Claire Gourzones
Caroline Bret1,2,3
Jerome Moreaux- 1IGH, CNRS, Univ Montpellier, France
- 2Department of Biological Hematology, CHU Montpellier, Montpellier, France
- 3Univ Montpellier, UFR de Médecine, Montpellier, France
- 4Institut Universitaire de France, Paris, France
Multiple myeloma (MM) is a malignancy characterized by accumulation of malignant plasma cells within the bone marrow (BM). MM is considered mostly without definitive treatment because of the inability of standard of care therapies to overcome drug-resistant relapse. Genotoxic agents are used in the treatment of MM and exploit the fact that DNA double-strand breaks are highly cytotoxic for cancer cells. However, their mutagenic effects are well-established and described. According to these effects, chemotherapy could cause harmful DNA damage associated with new driver genomic abnormalities providing selective advantage, drug resistance, and higher relapse risk. Several mechanisms associated with MM cell (MMC) resistance to genotoxic agents have been described, underlining MM heterogeneity. The understanding of these mechanisms provides several therapeutic strategies to overcome drug resistance and limit mutagenic effects of treatment in MM. According to this heterogeneity, adopting precision medicine into clinical practice, with the development of biomarkers, has the potential to improve MM disease management and treatment.
Introduction
Multiple myeloma (MM) is the second most common hematological malignancy, with an incidence ranging from 4 to 6 per 100,000/year in the United States (Braggio et al., 2015). Malignant plasma cells display prominent genomic abnormalities arising during tumorigenesis and accumulating during disease progression. This series of complex molecular events involved in MM development includes chromosomal abnormalities, oncogene activation, and cellular communication signals dysregulation. MM treatment strategies have significantly evolved during the last decades with an expanding arsenal of anti-MM therapies. This was associated with a three-fold improvement in median survival. According to these significant advances, long-term side effects and harmful effects of treatment are an important issue with the development of drug-resistant subclones and formation of therapy-related cancers caused by lesions they create in normal cells. Thus, understanding the DNA damages induced by anti-MM therapies and DNA damage response is important to improve patient survival and reduce harmful effects related to treatment.
Genomic Instability in Multiple Myeloma
Genome integrity is constantly assailed by diverse arrays of insults. These include genotoxic agents of exogenous origin and endogenous sources of DNA damage, such as reactive oxygen species, collisions between DNA replication and transcription, and programmed genomic rearrangements (Aguilera and Gomez-Gonzalez, 2008). B cells are particularly challenged in this regard. During their maturation, B lymphocytes are subjected different to genetic alterations, including V, D and J immunoglobulin genes recombination, Ig class switch recombination (CSR), and somatic hypermutation (SHM). To prevent immune deficiency, autoimmunity, or cancer, these biological processes should be tightly regulated (Gennery et al., 2000). MM cells are characterized by genomic instability, including chromosomal instability, mutations, and microsatellite instability. Recent genome sequencing studies of MM cells have uncovered the major genomic instability and molecular and subclonal heterogeneity of the disease (Lohr et al., 2014; Vikova et al., 2019).
DNA-Damaging Agents Used in Multiple Myeloma Treatment
Melphalan DNA-damaging agent was introduced for the treatment of MM in 1962. Several combinations have been developed to the improve outcome of patients, including other DNA-damaging agents (Table 1). The high-dose melphalan regimen combined with autologous hematopoietic stem cell transplant (ASCT) has long been considered frontline therapy for newly diagnosed patients. Melphalan is a nitrogen mustard known to induce mono-alkylation of adenine and guanine together with interstrand DNA crosslinks (Osborne et al., 1995). Monoadducts represent 95% of the lesions, whereas 5% are interstrand DNA crosslinks (ICLs) (Muniandy et al., 2010). In MM cells, ICL number is correlated with the melphalan concentration used (Spanswick et al., 2002). ICLs are highly toxic for MM cells.
Table 1 DNA-damaging chemotherapeutic drugs used in MM.
Results from studies with a long-term follow-up of patients treated with high-dose chemotherapy and ASCT demonstrated that 10%–15% of the patients remain alive after more than 10 years without relapse (Barlogie et al., 2006; van de Velde et al., 2007; Martinez-Lopez et al., 2011), demonstrating the efficacy of this strategy in MM (van Rhee et al., 2014). The novel drugs such as immunomodulatory agents (IMiDs) and proteasome inhibitors (PIs) used during induction, consolidation, and maintenance stages have significantly improved the outcome of the patients (Barlogie et al., 2006; Cavo et al., 2010; Ladetto et al., 2010; Moreau et al., 2011; Neben et al., 2012; Sonneveld et al., 2012).
Other genotoxic drugs are used to treat patients with MM, including cyclophosphamide, doxorubicin, busulfan, vincristine, etoposide, cisplatin, bendamustine, lyposomal doxorubicin, and melphalan flufenamide hydrochloride. Use of chemotherapeutic agents without cross-resistance could enhance peripheral blood stem cell collection and improve patient outcome related to better antitumor efficacy before ASCT. Cyclophosphamide is an alkylating agent inducing ICLs. Doxorubicin induces DNA double-strand DNA breaks (DSBs) related to intercalation into DNA and inhibition of topoisomerase II (TopII). Doxorubicin can also induce DNA adducts, free radicals release, and formaldehyde-dependent ICL formation (Bret et al., 2013). Etoposide is a DNA-damaging agent that induces DNA damage and inhibits DNA replication by suppressing the relaxation activity of TopIIA topoisomerase (Dobbelstein and Sorensen, 2015). Busulfan is a bifunctional alkylating agent. Vincristine is a microtubule-targeting agent that was demonstrated to increase DNA damage induced by DNA-damaging agents (Poruchynsky et al., 2015). Cisplatin is a platinum compound that modifies DNA, leading to the formation of intrastrand or interstrand crosslinks between bases. Cisplatin is used in DCEP regimen in combination with dexamethasone, etoposide, and cyclophosphamide (Dadacaridou et al., 2007; Park et al., 2014). Pegylated liposomal doxorubicin is a formulation of doxorubicin in liposomes with a prolonged circulation time (Voorhees et al., 2015). Bendamustine combines bifunctional alkylating nitrogen mustard group and a purine-like benzamidazol nucleus and was shown to overcome melphalan resistance in human myeloma cell lines (Cives et al., 2013). Melphalan flufenamide hydrochloride is a lipophilic alkylator characterized by intracellular hydrolysis after cellular uptake and release of active melphalan (Ray et al., 2016).
Drug Resistance Mechanisms to DNA-Damaging Agents
Drug Efflux, Cell Communication Signals, and Drug Metabolism
An important mechanism of multidrug resistance in cancer is the overexpression of ATP-binding cassette (ABC) transporters (Kathawala et al., 2015) (Figure 1). This family of transmembrane proteins use the energy generated by ATP hydrolysis to efflux cytotoxic compounds. The most studied ABC is dependent efflux pump P-glycoprotein (P-gp) coded by the MDR1/ABCB1 gene. In MM, no significant expression of P-gp was detected in newly diagnosed MM and in patients treated with melphalan (Grogan et al., 1993). P-gp overexpression was demonstrated to be associated with resistance to glucocorticoid, etoposide, doxorubicin, and vincristine (Dalton, 1997). VAD treatment (vincristine, doxorubicin, and dexamethasone) was associated with P-gp overexpression in MM patients (Sonneveld et al., 2001; Yang et al., 2003). However, a clinical trial with ABCB1 inhibitor (Zosuquidar) did not show any benefit in progression-free or overall survival in refractory MM patients when combined with vincristine, doxorubicin, and dexamethasone (Friedenberg et al., 2006).
Figure 1 Mechanisms involved in DNA-damaging drug resistance in MM. Overview of mechanisms contributing to resistance to DNA-damaging agents in MM, including cellular extrusion of the drugs by ATP-dependent pumps, decreased drug influx, increased drug inactivation by metabolism, inactivation of apoptotic pathways, enhanced DNA repair, and altered cell cycle checkpoints and cell communication signals provided by the microenvironment.
The behavior of MM cells is determined not only by their genetic or epigenetic background but also by their BM microenvironment. The majority of myeloma growth factors (MGFs) is secreted by the BM environment compared to autocrine MGFs (Mahtouk et al., 2010). Several studies have provided a comprehensive overview of MGF expression in the different BM cell subpopulations of MM patients (Podar et al., 2009; Mahtouk et al., 2010). Interactions between MM cells and bone marrow microenvironment could also play a role in DNA-damaging agents drug resistance (Figure 1). We have documented the rise of large concentrations of IL-6 9 days after high-dose melphalan in patients (Condomines et al., 2010). This large concentration of IL-6 will facilitate melphalan-resistant MMCs to survive within the BM. Patients treated with high-dose melphalan, stem cell transplantation, and anti-IL-6 antibody had a survival advantage when mixed with a large cohort of matched patients treated with melphalan and stem cell transplantation alone (Rossi et al., 2005). Cell adhesion-mediated drug resistance to doxorubicin, vincristine, and melphalan was described using human myeloma cell lines and primary MM cells from patients (Damiano et al., 1999; Noborio-Hatano et al., 2009; Neri et al., 2011a; Di Marzo et al., 2016). Bortezomib could overcome cell adhesion-mediated drug resistance through VLA-4 downregulation and inhibition of MM cell adhesion to stroma (Noborio-Hatano et al., 2009; Neri et al., 2011a). Cell adhesion-mediated drug resistance could also protect MM cells from etoposide toxicity (Hazlehurst et al., 2000). Targeting cell-to-cell communication between MM cells and BM microenvironment could improve current therapeutic strategies using DNA-damaging agents.
In vivo, drugs could be metabolized (Figure 1) through a number of reactions occurring through two distinct consecutive phases: phase I and phase II drug metabolism. Phase I drug metabolizing enzymes consist primarily of oxidases, reductases, and dehydrogenases, and phase II enzymes play an important role in biotransformation and inactivation of drugs. A study reported that MMCs of patients with a favorable outcome after treatment with high-dose therapy and ASCT are characterized by an overexpression of genes coding for xenobiotic receptors and their downstream targets, including phase I and phase II drug metabolism enzymes and transporters (Hassen et al., 2014). At the opposite, high-risk patients were characterized by overexpression of genes involved in Nrf2 and ARNT pathways (Hassen et al., 2014). These data underline a role of drug metabolism in chemotherapy resistance in MM and suggest that inhibitors targeting these pathways could open new perspectives to alleviate or overcome drug resistance.
DNA-Damaging Agents and DNA Repair Pathways
The fact that DNA double-strand breaks are highly cytotoxic is exploited by DNA-damaging agents used in the treatment of MM. According to the type of DNA damage, specific DNA repair pathways will be used to cope with DNA insults. For nucleotide lesions occurring on single strands, base excision repair (BER), nucleotide excision repair (NER), and mismatch repair (MMR) will be involved. For DSBs, there are two major pathways, including nonhomologous end-joining (NHEJ) and homologous recombination (HR) DNA repair. The DNA damage response (DDR) sensor proteins will be involved in the detection of damaged DNA, leading to cellular response activation, including one or more DNA repair pathways. For DSBs, Ku proteins and MRN complex are the predominant sensors. Fanconi anemia proteins, Poly (ADP -ribose) polymerase (PARP), mismatch repair proteins (including MSH2, MSH3, MSH6, PMS2, and MLH1), and NER proteins (including XPC, CSA, and DDB2) are other DNA-damage sensors (Brown et al., 2017).
Single-Strand Damage DNA Repair
Nucleotide Excision Repair
Nucleotide excision repair (NER) removes helix-distorting adducts on DNA that could be caused by UV or radiation and participates in the repair of ICLs44 (Figures 2 and 3A). NER can be coupled to transcription [transcription-coupled nucleotide excision repair (TC-NER)] opposed to global genome nucleotide excision repair (GG-NER) (Friedberg, 2001; Hanawalt and Spivak, 2008). In cancer cells exposed to genotoxic agents, NER plays a key role in removal and repair of the DNA damage (Kirschner and Melton, 2010). It has been demonstrated that NER is a major DNA repair mechanism that removes cisplatin-induced DNA damage. In solid tumors, high expression of ERCC1, involved in NER, is associated with resistance to platinum-based therapy. NER removes helix-distorting adducts participating in the ICL repair. ERCC1 and XP proteins play major roles in the repair of DNA adducts and ICLs (Figure 3A). Furthermore, deficiency in NER was associated with higher sensitivity to platinum agents and a reduced capacity to repair ICLs (Kirschner and Melton, 2010).
Figure 2 DNA single-strand damage repair. Base damages are repaired by base excision repair, bulky adducts by nucleotide excision repair, and base mismatch by mismatch repair pathway.
Figure 3 DNA interstrand crosslink repair. ICL repair can be initiated either at a stalled RNA polymerase (A) or at a replication fork (B). (A) ICLs in DNA will stall RNA polymerase during transcription. The RNA polymerase will either backtrack or be degraded during subsequent repair involving translesion (TLS) polymerases and NER pathway. (B) The removal of ICL during S and G2 phases involves the Fanconi anemia pathway, with sensing of ICL by FANCM, and then recruitment of protein complex, resulting in ICL removal, creation of DSB, which is repaired by homologous recombination.
Base Excision Repair
The base excision repair (BER) pathway repairs DNA damaged bases (Lindahl, 1993) (Figure 2). Conventional BER is initiated by specific DNA glycosylases that will hydrolyze N-glycosylic bond between the damaged base and the sugar phosphate backbone. This process is followed by end processing mechanism, repair synthesis, and ligation (Caldecott, 2008). However, different mechanisms could participate in BER pathways, depending on the physiological state of cancer cells and the type of DNA glycosylase involved (Caldecott, 2008).
Mismatch DNA Repair
Mismatch DNA repair (MMR) is involved in the repair of replication errors associated with nucleotide deletion or insertion or causing incorporation of a wrong nucleotide (Figure 2). MSH2-MSH6 defects in MMR are associated with drug resistance to temozolomide, nucleoside analogs, and platinum agents in solid cancers and Acute myeloid leukemia (AML) (Karran and Bignami, 1994; Fordham et al., 2011).
DSBs DNA Repair
DSBs can be generated during ICLs repair, by ROS, by DNA damaging used in MM treatment and during DNA replication when cells progress in S phase before completing single-strand DNA damage repair (Ciccia and Elledge, 2010; Deans and West, 2011). Several partially independent sensors can detect DSBs, including Ku70/Ku80, PARP, MRN, and RPA. Homologous recombination operates in the S and G2 phases of the cell cycle. Homologous recombination pathway is conservative and requires a homologous DNA template (Figure 4). At the opposite, NHEJ is nonconservative with direct ligation of DSB ends (Figure 4).
Figure 4 DNA double strand break repair. DSB are repaired by NHEJ or HRR pathways. NHEJ initiates with broken ends bound by Ku, which protects ends, leading to repair with partial resection and ligation of DNA ends. Alt-NHEJ is an alternative less accurate pathway. HRR is an accurate pathway. The DNA ends of the lesion are resected to allow invasion of the single strand into the sister chromatid used as a template for precise resynthesis of damaged DNA part. SSA is used only when two homologous regions flank the DSB site and is inaccurate.
Homologous Recombination DNA Repair
The homologous recombination DNA repair (HRR) pathway is complex and occurred during S and G2 phases of the cell cycle (Ciccia and Elledge, 2010; Deans and West, 2011; Gourzones-Dmitriev et al., 2013). The DNA ends of the lesion are resected to allow invasion of the single strand into the sister chromatid used as a template for precise resynthesis of damaged DNA part. HRR plays an important role in genomic stability (Curtin, 2012; Curtin, 2013). The MRN complex (MRE11-RAD50-NBS1) recognizes DSBs, and CtIP recruits RPA (Williams et al., 2007; Jasin and Rothstein, 2013). BRCA1 interacts also with MRN and CtIP and promotes HRR and single-strand annealing (SSA). The resulting 3′ ssDNA tails are bound by RPA, which is replaced with Rad51. The reaction is mediated by Rad52, Rad55, and Rad57. The RAD51 nucleoprotein filament promotes homology search. This is followed by exchange strand between the intact sister chromatid and the broken duplex and strand extension by DNA polymerase (Figure 4). HRR repairs DSBs, which occurs through exposure to topoisomerase inhibitors and DNA crosslinking agents used in MM treatment, including etoposide and doxorubicin. HRR plays a major role in stalled replication fork restart and ICL repair in association with the Fanconi anemia (FA) pathway (Figure 3B). HRR is more active in MM cells compared to normal plasma cells (Shammas et al., 2009; Roddam et al., 2010). Higher expressions of RAD50 and RAD51 proteins involved in HRR have been reported in primary MM cells and MM cell lines compared to normal plasma cells in association with increased HRR activity (Shammas et al., 2009; Roddam et al., 2010). The proliferation assessment based on propidium iodide incorporation (plasma cell labeling index) (San Miguel et al., 1995) or the assessment of Ki-67-expressing cells of malignant plasma cells (Alexandrakis et al., 2004) has been shown to be a powerful and independent predictor of survival in MM. (Greipp et al., 1988) The role of HRR in drug resistance of the small fraction of proliferating MM cells may be of particular importance in MM.
Single-Strand Annealing
SSA is used only when two homologous regions flank the DSB site. In this context, the homologous regions are exposed, and after annealing and cleavage of the DNA overhang, ligation of the ends results in the deletion of the intervening region (Figure 4). According to this process, SSA is inaccurate. Translocations induced by SSA have been reported when DSBs are located in repeats on different chromosomes (Hartlerode and Scully, 2009; Ciccia and Elledge, 2010).
NHEJ DNA Repair
NHEJ does not use significant homology at the broken ends. DSBs are sensed by Ku70/Ku80 that bind and activate DNA-PKcs protein kinase, leading to the recruitment and activation of DNA end-processing enzymes, such as ARTEMIS, template-independent polymerases (polymerases λ and μ), and XLF-XRCC4-DNA ligase 4 complex (Figure 4). More recently, several new accessory NHEJ factors, including PAXX/XLS and CYREN/MRI, have been described. These factors have been reported to be required for DNA ligation. PAXX/XLS is an accessory related to NHEJ pathway and presenting overlapping functions with XLF (Tadi et al., 2016). CYREN is a cell cycle-dependent inhibitor of NHEJ pathway, promoting repair by HR pathway (Arnoult et al., 2017; Hung et al., 2018). A correlation between polymorphisms or aberrant expressions of XRCC4, XRCC5 (encoding Ku80), XRCC6 (encoding Ku70), ARTEMIS, and LIG4 (encoding DNA ligase 4) genes and risk of MM development has been reported (Roddam et al., 2002; Hayden et al., 2007; Roddam et al., 2010). Interestingly, high expression of XRCC5 and ARTEMIS genes was associated with a poor prognosis in MM patients (Calimeri et al., 2012). A recent study investigated the functionality of DSB repair in MM cells and identified upregulation of ARTEMIS, DNA-PKcs, and XRCC4 proteins in MM cells (Herrero et al., 2015). NHEJ activity was also significantly elevated in MM cells compared to a normal lymphoblastoid cell line (Herrero et al., 2015). Furthermore, MMSET was recently identified to be involved in DNA damage response as a sensor (Hajdu et al., 2011). MMSET, like RIF1, is an ATM-dependent DDR factor. MMSET accumulates at DSBs, leading to recruitment of 53BP1. Recruitment of 53BP1 to DSBs is dependent on histone H4 methylation by MMSET (Pei et al., 2011). However, two other groups demonstrated that MMSET had no effect on 53BP1 foci formation and H4K20 methylation (Hsiao and Mizzen, 2013; Tuzon et al., 2014). During B-cell development, MMSET is also involved in class-switch recombination accumulating at immunoglobulin gene-switch regions with H3K36me2 and γH2AX. Furthermore, MMSET depletion led to defects in class-switch recombination (Pei et al., 2013). DSBs generated during CSR modifications of B-lymphocyte Ig genes are mainly repaired by NHEJ (Lieber, 2010). H3K36 methylation, induced by MMSET and other histone methyltransferases, can also influence DNA repair pathway choice (Fnu et al., 2011; Aymard et al., 2014; Carvalho et al., 2014; Pfister et al., 2014). More recently, it was shown that MMSET is necessary for efficient NHEJ and HRR (Shah et al., 2016). MMSET depletion resulted in decreased expression of DNA repair genes and significant reduction in the recruitment of DNA repair proteins at DNA damage sites. MMSET overexpression is associated with increased DNA repair efficiency. Loss of MMSET combined with melphalan treatment leads to decreased tumor mass and increased survival in mice (Shah et al., 2016). MMSET-overexpressing cells demonstrate increased γH2AX after treatment with DNA-damaging agents, suggesting a role in drug resistance through accelerated DNA repair (Shah et al., 2016). Given the association of t(4;14), involving MMSET, with poor outcome in MM, this potential perturbation of DNA repair may prove highly relevant to disease progression and drug resistance. More recently, Wang and Goldstein (2016) demonstrated that Dicer- and Drosha-dependent diRNAs play a role in guiding molecules to promote the recruitment of MMSET and other proteins to DSB sites. Several groups have demonstrated that H3K36 is the main target of MMSET without effect on H4K20 (Li et al., 2009; Martinez-Garcia et al., 2010; Popovic et al., 2014). Several studies reported that H3K36 mark favors NHEJ as DNA repair pathway choice (Fnu et al., 2011; Aymard et al., 2014; Carvalho et al., 2014; Pai et al., 2014; Pfister et al., 2014). H3K36me2 increase and H3K27me3 decrease in MMSET-overexpressing cells are associated with a more open chromatin state (Martinez-Garcia et al., 2010; Popovic et al., 2014). This chromatin state is associated with an increased DNA damage when cells are treated with a DNA-damaging agent (Shah et al., 2016). However, DNA repair proteins could access more easily to chromatin and facilitate efficient DNA repair (Ransom et al., 2010; Soria et al., 2012), as observed in cells with high MMSET expressions (Shah et al., 2016).
Alternative NHEJ DNA Repair
Alt-NHEJ is an alternative end-joining pathway that is detected when the classical NHEJ pathway is impaired (Nussenzweig and Nussenzweig, 2007; Mladenov and Iliakis, 2011) (Figure 4). Alt-NHEJ is less accurate, requires more extensive end resection, and frequently uses microhomology. DNA ends are resected up to regions of microhomology, annealed, and ligated by XRCC1/ligases 1 and 3 (Ciccia and Elledge, 2010; Shaheen et al., 2011; Simsek et al., 2011; Boboila et al., 2012). The 53BP1 protein protects DNA ends from nucleolytic degradation and thereby prevents microhomology mediated repair (Bothmer et al., 2010). Moreover, it has been implicated in the chromosomal translocation process involved in lymphoid tumorigenesis (Nussenzweig and Nussenzweig, 2007; Kotnis et al., 2009). Overexpression of proteins involved in alt-NHEJ, including DNA ligase 3, was also reported in MM cells (Herrero et al., 2015). Activity of this highly mutagenic pathway was identified in MM cells through detection of largest deletions and higher sequence microhomology at DNA lesion sites and could be decreased by alt-NHEJ inhibition (Herrero et al., 2015).
DNA Repair and Resistance to DNA-Damaging Agents in Multiple Myeloma
Cyclophosphamide is a genotoxic agent inducing ICLs. Melphalan is also a nitrogen mustard that induces ICLs. The vast majority of the lesions induced by melphalan are monoadducts and 5% ICLs (Osborne et al., 1995; Muniandy et al., 2010). The ICL number induced by melphalan in MM cells is correlated with the concentration used (Spanswick et al., 2002). Doxorubicin induces DNA adducts, DSB, free radicals release, and formaldehyde-dependent ICL formation. A study reported that MM cells from patients previously treated by melphalan are able to repair ICLs in vitro, whereas MM cells from untreated patients could not (Spanswick et al., 2002). Furthermore, melphalan-induced DNA damage, in vitro, in peripheral blood mononuclear cells is a predictor for clinical outcome in patients treated by high-dose melphalan and ASCT (Dimopoulos et al., 2007). A significant association between polymorphisms of genes involved in DNA repair and melphalan resistance was identified in MM (Dumontet et al., 2010). In a cohort of MM patients treated with high-dose melphalan and ASCT, polymorphisms of PARP, RAD51, PCNA, OGG1, XPC, BRCA1, ERCC1, BARD1, and TP53BP1 are associated with the outcome and overall survival of patients (Dumontet et al., 2010). These genes are significantly enriched in genes involved in HRR and NER necessary for ICL repair. NER removes helix-distorting adducts on DNA and contributes to the repair of ICLs. Furthermore, reduced capacity to repair ICL has been associated with NER deficiency (Figure 3A) together with higher sensitivity to platinum agents (Kirschner and Melton, 2010) ERCC2 and XRCC3 gene polymorphisms are associated with treatment outcome and drug resistance in patients treated with high-dose melphalan and ASCT (Vangsted et al., 2007). In MM cell lines resistant to melphalan, overexpression or BRCA1, BRCA2, FANCA, FANCC, FANCF, FANCL, and RAD51C; upregulation of HRR; and Fanconi pathways were identified. Depletion of FANCF could overcome melphalan resistance, and FANCF overexpression protects MM cells from melphalan toxicity (Chen et al., 2005). FA pathway appears as a key player in DNA-damaging agent resistance. NF-κB, constitutively activated in MM (Demchenko and Kuehl, 2010; Chapman et al., 2011), was shown to transcriptionally regulate FA pathway genes (Yarde et al., 2009). According to that, proteasome inhibitors affect DNA repair pathways in MM through several mechanisms. Proteasome inhibitors block NF-kB-mediated transcriptional activation of FA genes (Yarde et al., 2009). PIs also inhibit the decrease in FANCD2 monoubiquitination and the expression of FANC proteins (Jacquemont and Taniguchi, 2007). PIs also target HRR by blocking NBS1, BRCA1, phospho-ATM, and Rad51 recruitment (Murakawa et al., 2007). PI treatment reduces the pool of available nuclear ubiquitin and impede FANCD2 and H2AX ubiquination (Neri et al., 2011b). Bortezomib treatment may prevent DNA resection through inhibiting proteasomal degradation of proteins involved in chromatin relaxation (Jacquemont and Taniguchi, 2007; Murakawa et al., 2007). This mechanism impedes the recruitment of RPA onto ssDNA (Jacquemont and Taniguchi, 2007; Murakawa et al., 2007). This effect of PIs on DNA repair could explain the synergistic activity of PI treatment with high-dose melphalan before ASCT (Roussel et al., 2010). MMSET was also involved in melphalan drug resistance through significant increases of DNA repair efficiency (Shah et al., 2016). Several studies demonstrated a role of BER in DNA-damaging agent resistance in MM. APE1 depletion was reported to sensitize MM cells to melphalan treatment (McNeill et al., 2009). More recently, gene expression profile analyses revealed a prognostic value of genes involved in FA (RMI1, FANCI, and FANCA), NER (PCNA, RPA3, LIG3, POLD3, ERCC4, POMD1, ERCC1, and ERCC5), NHEJ [WHSC1 (MMSET), RIF1, XRCC5 (Ku80), PNKP, and POLL], MMR (EXO1 and MSH2), and HRR (EXO1, BLM, RPA3, RAD51, MRE11A, and ATM) pathways in MM (Kassambara et al., 2014). Based on these prognostic genes, NHEJ, HRR, FA, and NER gene-based risk scores were created, allowing identification of high-risk MM patients in two independent cohorts of patients treated with high-dose melphalan and ASCT (Kassambara et al., 2014). Furthermore, a DNA repair risk score, incorporating all of the 22 DNA repair prognostic genes presented a strong prognostic value for both event-free survival and overall survival in two independent cohorts of MM patients. This gene-based DNA repair score remained an independent prognostic factor when tested together with known prognostic factors, including previously published gene expression profiling (GEP)-based risk scores, t(4;14), del17p and with standard clinical prognostic factors, ISS, b2m, and albumin. These DNA repair scores represent powerful tools to develop synthetic lethality approaches and exploit the addiction of MM cells to a specific DNA repair pathway (Kassambara et al., 2014).
RECQ helicases playing a role in repair of damaged replication forks, DNA damage response, and homologous recombination are also involved in cancer cell drug resistance (Futami et al., 2008a; Futami et al., 2008b; Arai et al., 2011; Viziteu et al., 2016). In MM, high RECQ1 expression is associated with resistance to genotoxic agents and poor prognostic value in several independent cohorts of MM patients (Viziteu et al., 2017). MM cells overexpressing RECQ1 are able to repair DNA breaks induced by genotoxic agents more efficiently, conferring drug resistance (Viziteu et al., 2017). Interestingly, the abnormal overexpression of RECQ1 in MM is linked to aberrant methylation of miR-203. DNA methylation inhibitor treatment induces upregulation of miR-203 followed by RECQ1 downregulation and hypersensitivity to treatments (Viziteu et al., 2017).
In MM patients characterized by 1q21 amplification, high expression of ILF2 has also been reported to participate in resistance to genotoxic agents through regulation of DNA repair gene splicing transcription (Marchesini et al., 2017).
Mutagenic Effects of Chemotherapy in Multiple Myeloma
Genotoxic agents can induce mutagenic effects. DNA alkylating agents and intercalating agents have been associated with mutations signatures (Szikriszt et al., 2016). According to these effects, chemotherapy could cause harmful DNA damage associated with new driver genomic abnormalities, providing selective advantage, drug resistance, and higher relapse risk (Weinhold et al., 2016). Alkylating agents also modify the redox potential of cancer cells. This mechanism has been reported for melphalan and bendamustine that increase the level of reactive oxygen species (ROS), inhibit the activity of thioredoxin reductase, and activate p53 pathway (Witte et al., 2005; Surget et al., 2014). Interestingly, reduced glutathione (GSH) protects MM cells from melphalan-induced toxicity without affecting the ability of melphalan to induce DNA damage (Gourzones et al., 2019). Deregulation of genes involved in response to oxidative stress is associated with a poor outcome and Melphalan resistance in MM (Gourzones et al., 2019). The DNA damage accumulation resulting from survival advantage mediated by the redox system upregulation could participate in new genomic driver events and poor outcome in MM (Gourzones et al., 2019). In this context, the selective pressure of chemotherapy may result in new driver mutations associated with MM cell subclonal selection and drug resistance, as illustrated with double hit events involving tumor suppressor genes, including TP53 and FAM46C in MM patients at relapse (Weinhold et al., 2016). Overexpression of DNA repair machinery could also result in new genomic events especially if nonaccurate pathways like alt-NHEJ are involved (Gourzones-Dmitriev et al., 2013; Viziteu et al., 2017).
Synthetic Lethality Therapeutic Strategies to Overcome Drug Resistance
DNA repair pathways and other pathways are deregulated in many MM patients to provide adaptive mechanisms and support drug resistance. Targeting DNA repair pathways may potentiate the efficacy of current drugs and overcome drug resistance and represents an opportunity to develop synthetic lethality approaches. Synthetic lethal strategies are currently developed in the context of the DNA damage response with the finding that PARP inhibitors are specifically toxic to HRR defective cancer cells (Bryant et al., 2005; Farmer et al., 2005). Because PI treatment was reported to induce BRCAness in MM cells, (Neri et al., 2011b) this strategy was used for MM cells. Cotreatment of MMCs with bortezomib and PARP1 inhibitor resulted in DSB accumulation and MMC killing (Neri et al., 2011b). Novel compounds targeting DNA repair pathways are being clinically evaluated in patients with cancer to induce synthetic lethality (Shaheen et al., 2011; O’Connor, 2015) (Table 2). These inhibitors targeting DNA repair pathways or cell cycle checkpoints (PARP1, DNA-PK, ATM, Ataxia telangiectasia and Rad3 related (ATR), MGMT, APE, CHK1, CHK2) could be useful to target MMCs in combination with DNA-damaging drugs and reverse drug resistance. The choice of which DNA repair inhibitor combine with the different DNA-damaging agents used in MM is related to align the DNA damage induced by the DNA-damaging agent with the DDR repair mechanism. PARP inhibitor was shown to reverse melphalan resistance in human myeloma cell lines, and combination with melphalan has synergistic association to FA and HRR pathways (Xiong et al., 2015). ATR inhibitor also demonstrated significant anti-MM toxicity in the context of MYC-induced replicative stress (Cottini et al., 2015). Interestingly, combination of ATR inhibitor with piperlongumine, a compound increasing ROS levels, exacerbates oncogene-induced DNA damage and shows a synergistic effect (Cottini et al., 2015). CHK1/2 inhibitor AZD7762 was shown to potentiate the effects of melphalan, bendamustine, and doxorubicin in p53-deficient MM cell lines (Landau et al., 2012). Cyclin-dependent kinase (CDK) inhibitors have been identified to impair HRR and sensitize cancer cells to DNA-damaging agents (Jorda et al., 2011; Raghavan et al., 2012). CDK1 and 2 phosphorylate BRCA1 with an important role in the formation of BRCA1 and RAD51 foci and HRR (Ruffner et al., 1999; Johnson et al., 2011). CDK deregulation is a hallmark of MM, and CDK inhibitors are currently under clinical evaluation in MM (Bergsagel et al., 2005; Kumar et al., 2015; Niesvizky et al., 2015). Alagpulinsa et al. (2016) demonstrated that dinaciclib, an inhibitor of CDK, impairs HRR in MM cells and sensitizes them to PARP inhibitor without toxicity to normal B cells. Maes et al. (2014) reported DNA damage induction by DNA methyltransferase inhibitor decitabine in MM cells and stimulation of HRR and NHEJ pathways. Interestingly, combination with HDAC inhibitor or RAD51 inhibitor significantly enhances decitabine-mediated toxicity (Maes et al., 2014). These combinations could be of therapeutic interest in MM with conventional DNA-damaging agents. Several other epigenetic drugs have been shown to enhance the effect of DNA repair inhibitors in other cancers (Orta et al., 2014; Wu et al., 2015). Histone lysine methyltransferase inhibitors could prevent the BRCA1/BARD1 complex at DSBs (Wu et al., 2015).
Table 2 DNA damage response inhibitors in clinical development.
Achieving success in the clinic with targeted DNA repair inhibitors in combination with DNA-damaging agents will need identification of the MM cell-specific deregulation associated with susceptibility to a DNA repair inhibitor. The GEP-based DNA repair scores recently reported could be of interest in stratifying MM patients and target the addiction of malignant plasma cells to a specific DNA repair pathway. In addition, maximizing the therapeutic window by identifying the correct dose and schedule will be important. In this context, persistence of viable malignant MM cells, within bone marrow, 7 days after high-dose melphalan and ASCT has been reported in two thirds of the patients (Caraux et al., 2012). This therapeutic window could be exploited for residual MM cell eradication before ASCT, taking advantage of new immune therapies presenting favorable toxicity profiles. Furthermore, modulating the redox system would be of therapeutic interest to optimize the use of genotoxic agents in MM (Gourzones et al., 2019).
Conclusion
Genotoxic agents cause DNA damage that can be recognized by DNA damage response pathways. The accumulation of unrepaired DNA lesions is associated with MM cell apoptosis. MM cells evading DNA damage-induced apoptosis may acquire new genomic alterations that could confer selective advantage and drug resistance. Several mechanisms associated with MMC resistance to genotoxic agents have been described, underlining the MM’s endemic heterogeneous landscape. These findings provide several therapeutic strategies to overcome drug resistance and limit mutagenic effects of genotoxic agents in MM. According to this heterogeneity, adopting precision medicine into clinical practice has the potential to improve MM disease management and treatment. Furthermore, another limitation arises from adverse toxicity on normal cells and tissues, underlining the need to better understand the drug’s mode of action to optimize between efficacy and harmful effects.
Author Contributions
CG and CB participated in the writing of the paper. JM supervised the writing of the paper.
Funding
This work was supported by grants from the Institut National du Cancer, INCA, Paris, France, PLBIO15-256, and PLBIO18; 2018-160, ANR (TIE-Skip; 2017-CE15-0024-01), FFRMG, AF3M, Institut Universitaire de France and SIRIC Montpellier (INCa-DGOS-Inserm 6045).
Conflict of Interest Statement
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
References
Aguilera, A., Gomez-Gonzalez, B. (2008). Genome instability: a mechanistic view of its causes and consequences. Nat. Rev. Genet. 9 (3), 204–217. doi: 10.1038/nrg2268
Alagpulinsa, D. A., Ayyadevara, S., Yaccoby, S., Shmookler Reis, R. J. (2016). A Cyclin-Dependent Kinase Inhibitor, Dinaciclib, Impairs Homologous Recombination and Sensitizes Multiple Myeloma Cells to PARP Inhibition. Mol. Cancer Ther. 15 (2), 241–250. doi: 10.1158/1535-7163.MCT-15-0660
Alexandrakis, M. G., Passam, F. H., Kyriakou, D. S., Dambaki, K., Niniraki, M., Stathopoulos, E. (2004). Ki-67 proliferation index: correlation with prognostic parameters and outcome in multiple myeloma. Am. J. Clin. Oncol. 27 (1), 8–13. doi: 10.1097/01.coc.0000045810.91816.41
Arai, A., Chano, T., Futami, K., Furuichi, Y., Ikebuchi, K., Inui, T., et al. (2011). RECQL1 and WRN proteins are potential therapeutic targets in head and neck squamous cell carcinoma. Cancer Res. 71 (13), 4598–4607. doi: 10.1158/0008-5472.CAN-11-0320
Arnoult, N., Correia, A., Ma, J., Merlo, A., Garcia-Gomez, S., Maric, M., et al. (2017). Regulation of DNA repair pathway choice in S and G2 phases by the NHEJ inhibitor CYREN. Nature 49 (7673), 548–552. doi: 10.1038/nature24023
Aymard, F., Bugler, B., Schmidt, C. K., Guillou, E., Caron, P., Briois, S., et al. (2014). Transcriptionally active chromatin recruits homologous recombination at DNA double-strand breaks. Nat. Struct. Mol. Biol. 21 (4), 366–374. doi: 10.1038/nsmb.2796
Barlogie, B., Tricot, G., Rasmussen, E., Anaissie, E., Van Rhee, F., Zangari, M., et al. (2006). Total therapy 2 without thalidomide in comparison with total therapy 1: role of intensified induction and posttransplantation consolidation therapies. Blood. 107 (7), 2633–2638. doi: 10.1182/blood-2005-10-4084
Barlogie, B., Tricot, G. J., Van Rhee, F., Angtuaco, E., Walker, R., Epstein, J., et al. (2006). Long-term outcome results of the first tandem autotransplant trial for multiple myeloma. Br. J. Haematol. 135 (2), 158–164. doi: 10.1111/j.1365-2141.2006.06271.x
Bergsagel, P. L., Kuehl, W. M., Zhan, F., Sawyer, J., Barlogie, B., Shaughnessy, J., Jr. (2005). Cyclin D dysregulation: an early and unifying pathogenic event in multiple myeloma. Blood. 106 (1), 296–303. doi: 10.1182/blood-2005-01-0034
Boboila, C., Oksenych, V., Gostissa, M., Wang, J. H., Zha, S., Zhang, Y., et al. (2012). Robust chromosomal DNA repair via alternative end-joining in the absence of X-ray repair cross-complementing protein 1 (XRCC1). Proc. Natl. Acad. Sci. U.S.A. 109 (7), 2473–2478. doi: 10.1073/pnas.1121470109
Bothmer, A., Robbiani, D. F., Feldhahn, N., Gazumyan, A., Nussenzweig, A., Nussenzweig, M. C. (2010). 53BP1 regulates DNA resection and the choice between classical and alternative end joining during class switch recombination. J. Exp. Med. 207 (4), 855–865. doi: 10.1084/jem.20100244
Braggio, E., Kortum, K. M., Stewart, A. K. (2015). SnapShot: multiple myeloma. Cancer Cell. 28 (5), 678 e671. doi: 10.1016/j.ccell.2015.10.014
Bret, C., Klein, B., Moreaux, J. (2013). Nucleotide excision DNA repair pathway as a therapeutic target in patients with high-risk diffuse large B cell lymphoma. Cell Cycle 12 (12), 1811–1812. doi: 10.4161/cc.25115
Brown, J. S., O’Carrigan, B., Jackson, S. P., Yap, T. A. (2017). Targeting DNA repair in cancer: beyond PARP Inhibitors. Cancer Discov. 7 (1), 20–37. doi: 10.1158/2159-8290.CD-16-0860
Bryant, H. E., Schultz, N., Thomas, H. D., Parker, K. M., Flower, D., Lopez, E., et al. (2005). Specific killing of BRCA2-deficient tumours with inhibitors of poly(ADP-ribose) polymerase. Nature 434 (7035), 913–917. doi: 10.1038/nature03443
Caldecott, K. W. (2008). Single-strand break repair and genetic disease. Nat. Rev. Genet. 9 (8), 619–631. doi: 10.1038/nrg2380
Calimeri, T., Fulciniti, M., Lin, J., Samur, M. K., Calkins, A. S., Vahia, A. V., et al. (2012). Aberrant non-homologous end joining in multiple myeloma: a role in genomic instability and as potential prognostic marker. Blood. 120 (21), 2932–2932.
Caraux, A., Vincent, L., Bouhya, S., Quittet, P., Moreaux, J., Requirand, G., et al. (2012). Residual malignant and normal plasma cells shortly after high dose melphalan and stem cell transplantation. Highlight of a putative therapeutic window in Multiple Myeloma? Oncotarget 3 (11), 1335–1347. doi: 10.18632/oncotarget.650
Carvalho, S., Vitor, A. C., Sridhara, S. C., Martins, F. B., Raposo, A. C., Desterro, J. M., et al. (2014). SETD2 is required for DNA double-strand break repair and activation of the p53-mediated checkpoint. eLife. 3, e02482. doi: 10.7554/eLife.02482
Cavo, M., Tacchetti, P., Patriarca, F., Petrucci, M.T., Pantani, L., Galli, M., et al. (2010). Bortezomib with thalidomide plus dexamethasone compared with thalidomide plus dexamethasone as induction therapy before, and consolidation therapy after, double autologous stem-cell transplantation in newly diagnosed multiple myeloma: a randomised phase 3 study. Lancet 376 (9758), 2075–2085. doi: 10.1016/S0140-6736(10)61424-9
Chapman, M. A., Lawrence, M. S., Keats, J. J., Cibulkis, K., Sougnez, C., Schinzel, A. C., et al. (2011). Initial genome sequencing and analysis of multiple myeloma. Nature 471 (7339), 467–472. doi: 10.1038/nature09837
Chen, Q., Van der Sluis, P. C., Boulware, D., Hazlehurst, L. A., Dalton, W. S. (2005). The FA/BRCA pathway is involved in melphalan-induced DNA interstrand cross-link repair and accounts for melphalan resistance in multiple myeloma cells. Blood. 106 (2), 698–705. doi: 10.1182/blood-2004-11-4286
Ciccia, A., Elledge, S. J. (2010). The DNA damage response: making it safe to play with knives. Mol. Cell. 40 (2), 179–204. doi: 10.1016/j.molcel.2010.09.019
Cives, M., Ciavarella, S., Rizzo, F. M., De Matteo, M., Dammacco, F., Silvestris, F. (2013). Bendamustine overcomes resistance to melphalan in myeloma cell lines by inducing cell death through mitotic catastrophe. Cell Signal. 25 (5), 1108–1117. doi: 10.1016/j.cellsig.2013.01.020
Condomines, M., Veyrune, J. L., Larroque, M., Quittet, P., Latry, P., Lugagne, C., et al. (2010). Increased plasma-immune cytokines throughout the high-dose melphalan-induced lymphodepletion in patients with multiple myeloma: a window for adoptive immunotherapy. J. Immunol. 184 (2), 1079–1084. doi: 10.4049/jimmunol.0804159
Cottini, F., Hideshima, T., Suzuki, R., Tai, Y. T., Bianchini, G., Richardson, P. G., et al. (2015). Synthetic Lethal Approaches Exploiting DNA Damage in Aggressive Myeloma. Cancer Discov. 5 (9), 972–987. doi: 10.1158/2159-8290.CD-14-0943
Curtin, N. J. (2012). DNA repair dysregulation from cancer driver to therapeutic target. Nat. Rev Cancer 12 (12), 801–817. doi: 10.1038/nrc3399
Curtin, N. J. (2013). Inhibiting the DNA damage response as a therapeutic manoeuvre in cancer. Br. J. Pharmacol. 169 (8), 1745–1765. doi: 10.1111/bph.12244
Dadacaridou, M., Papanicolaou, X., Maltesas, D., Megalakaki, C., Patos, P., Panteli, K., et al. (2007). Dexamethasone, cyclophosphamide, etoposide and cisplatin (DCEP) for relapsed or refractory multiple myeloma patients. J. BUON. 12 (1), 41–44.
Dalton, W. S. (1997). Detection of multidrug resistance gene expression in multiple myeloma. Leukemia 11 (7), 1166–1169. doi: 10.1038/sj.leu.2400724
Damiano, J. S., Cress, A. E., Hazlehurst, L. A., Shtil, A. A., Dalton, W. S. (1999). Cell adhesion mediated drug resistance (CAM-DR): role of integrins and resistance to apoptosis in human myeloma cell lines. Blood. 93 (5), 1658–1667.
Deans, A. J., West, S. C. (2011). DNA interstrand crosslink repair and cancer. Nat. Rev Cancer 11 (7), 467–480. doi: 10.1038/nrc3088
Demchenko, Y. N., Kuehl, W. M. (2010). A critical role for the NFkB pathway in multiple myeloma. Oncotarget 1 (1), 59–68. doi: 10.18632/oncotarget.109
Di Marzo, L., Desantis, V., Solimando, A. G., Ruggieri, S., Annese, T., Nico, B., et al. (2016). Microenvironment drug resistance in multiple myeloma: emerging new players. Oncotarget. 7, 60698–60711 doi: 10.18632/oncotarget.10849
Dimopoulos, M. A., Souliotis, V. L., Anagnostopoulos, A., Bamia, C., Pouli, A., Baltadakis, I., et al. (2007). Melphalan-induced DNA damage in vitro as a predictor for clinical outcome in multiple myeloma. Haematologica 92 (11), 1505–1512. doi: 10.3324/haematol.11435
Dobbelstein, M., Sorensen, C. S. (2015). Exploiting replicative stress to treat cancer. Nat. Rev. Drug Discov. 14 (6), 405–423. doi: 10.1038/nrd4553
Dumontet, C., Landi, S., Reiman, T., Perry, T., Plesa, A., Bellini, I., et al. (2010). Genetic polymorphisms associated with outcome in multiple myeloma patients receiving high-dose melphalan. Bone Marrow Transplant 45 (8), 1316–1324. doi: 10.1038/bmt.2009.335
Farmer, H., Mccabe, N., Lord, C. J., Tutt, A. N., Johnson, D. A., Richardson, T. B., et al. (2005). Targeting the DNA repair defect in BRCA mutant cells as a therapeutic strategy. Nature 434 (7035), 917–921. doi: 10.1038/nature03445
Fnu, S., Williamson, E. A., De Haro, L. P., Brenneman, M., Wray, J., Shaheen, M., et al. (2011). Methylation of histone H3 lysine 36 enhances DNA repair by nonhomologous end-joining. Proc. Natl. Acad. Sci. U.S.A. 108 (2), 540–545. doi: 10.1073/pnas.1013571108
Fordham, S. E., Matheson, E. C., Scott, K., Irving, J. A., Allan, J. M. (2011). DNA mismatch repair status affects cellular response to Ara-C and other anti-leukemic nucleoside analogs. Leukemia 25 (6), 1046–1049. doi: 10.1038/leu.2011.38
Friedberg, E. C. (2001). How nucleotide excision repair protects against cancer. Nat. Rev. Cancer 1 (1), 22–33. doi: 10.1038/35094000
Friedenberg, W. R., Rue, M., Blood, E. A., Dalton, W. S., Shustik, C., Larson, R. A., et al. (2006). Phase III study of PSC-833 (valspodar) in combination with vincristine, doxorubicin, and dexamethasone (valspodar/VAD) versus VAD alone in patients with recurring or refractory multiple myeloma (E1A95): a trial of the Eastern Cooperative Oncology Group. Cancer 106 (4), 830–838. doi: 10.1002/cncr.21666
Futami, K., Kumagai, E., Makino, H., Goto, H., Takagi, M., Shimamoto, A., et al. (2008a). Induction of mitotic cell death in cancer cells by small interference RNA suppressing the expression of RecQL1 helicase. Cancer Sci. 99 (1), 71–80. doi: 10.1111/j.1349-7006.2007.00647.x
Futami, K., Kumagai, E., Makino, H., Sato, A., Takagi, M., Shimamoto, A., et al. (2008b). Anticancer activity of RecQL1 helicase siRNA in mouse xenograft models. Cancer Sci. 99 (6), 1227–1236. doi: 10.1111/j.1349-7006.2008.00794.x
Gennery, A. R., Cant, A. J., Jeggo, P. A. (2000). Immunodeficiency associated with DNA repair defects. Clin. Exp. Immunol. 121 (1), 1–7. doi: 10.1046/j.1365-2249.2000.01257.x
Gourzones, C., Bellanger, C., Lamure, S., Gadacha, O. K., De Paco, E. G., Vincent, L., et al. (2019). antioxidant defenses confer resistance to high dose melphalan in multiple myeloma cells. Cancers (Basel) 11 (4): E439. doi: 10.3390/cancers11040439
Gourzones-Dmitriev, C., Kassambara, A., Sahota, S., Reme, T., Moreaux, J., Bourquard, P., et al. (2013). DNA repair pathways in human multiple myeloma: role in oncogenesis and potential targets for treatment. Cell Cycle 12 (17), 2760–2773. doi: 10.4161/cc.25951
Greipp, P. R., Katzmann, J. A., O’Fallon, W. M., Kyle, R. A. (1988). Value of beta 2-microglobulin level and plasma cell labeling indices as prognostic factors in patients with newly diagnosed myeloma. Blood. 72 (1), 219–223.
Grogan, T. M., Spier, C. M., Salmon, S. E., Matzner, M., Rybski, J., Weinstein, R. S., et al. (1993). P-glycoprotein expression in human plasma cell myeloma: correlation with prior chemotherapy. Blood. 81 (2), 490–495.
Hajdu, I., Ciccia, A., Lewis, S. M., Elledge, S. J. (2011). Wolf-Hirschhorn syndrome candidate 1 is involved in the cellular response to DNA damage. Proc. Natl. Acad. Sci. U.S.A. 108 (32), 13130–13134. doi: 10.1073/pnas.1110081108
Hanawalt, P. C., Spivak, G. (2008). Transcription-coupled DNA repair: two decades of progress and surprises. Nat. Rev. Mol. Cell. Biol. 9 (12), 958–970. doi: 10.1038/nrm2549
Hartlerode, A. J., Scully, R. (2009). Mechanisms of double-strand break repair in somatic mammalian cells. Biochem. J. 423 (2), 157–168. doi: 10.1042/BJ20090942
Hassen, W., Kassambara, A., Reme, T., Sahota, S., Seckinger, A., Vincent, L., et al. (2014). Drug metabolism and clearance system in tumor cells of patients with multiple myeloma. Oncotarget. 6, 6431–6447 doi: 10.18632/oncotarget.3237
Hayden, P. J., Tewari, P., Morris, D. W., Staines, A., Crowley, D., Nieters, A., et al. (2007). Variation in DNA repair genes XRCC3, XRCC4, XRCC5 and susceptibility to myeloma. Hum. Mol. Genet. 16 (24), 3117–3127. doi: 10.1093/hmg/ddm273
Hazlehurst, L. A., Damiano, J. S., Buyuksal, I., Pledger, W. J., Dalton, W. S. (2000). Adhesion to fibronectin via beta1 integrins regulates p27kip1 levels and contributes to cell adhesion mediated drug resistance (CAM-DR). Oncogene 19 (38), 4319–4327. doi: 10.1038/sj.onc.1203782
Herrero, A. B., San Miguel, J., Gutierrez, N. C. (2015). Deregulation of DNA double-strand break repair in multiple myeloma: implications for genome stability. PLoS One 10 (3), e0121581. doi: 10.1371/journal.pone.0121581
Hsiao, K. Y., Mizzen, C. A. (2013). Histone H4 deacetylation facilitates 53BP1 DNA damage signaling and double-strand break repair. J. Mol. Cell Biol. 5 (3), 157–165. doi: 10.1093/jmcb/mjs066
Hung, P. J., Johnson, B., Chen, B. R., Byrum, A. K., Bredemeyer, A. L., Yewdell, W. T., et al. (2018). MRI Is a DNA Damage Response Adaptor during Classical Non-homologous End Joining. Mol. Cell. 71 (2), 332–342 e338. doi: 10.1016/j.molcel.2018.06.018
Jacquemont, C., Taniguchi, T. (2007). Proteasome function is required for DNA damage response and fanconi anemia pathway activation. Cancer Res. 67 (15), 7395–7405. doi: 10.1158/0008-5472.CAN-07-1015
Jasin, M., Rothstein, R. (2013). Repair of strand breaks by homologous recombination. Cold Spring Harb. Perspect. Biol. 5 (11), a012740. doi: 10.1101/cshperspect.a012740
Johnson, N., Li, Y. C., Walton, Z. E., Cheng, K. A., Li, D., Rodig, S. J., et al. (2011). Compromised CDK1 activity sensitizes BRCA-proficient cancers to PARP inhibition. Nat. Med. 17 (7), 875–882. doi: 10.1038/nm.2377
Jorda, R., Havlicek, L., Mcnae, I. W., Walkinshaw, M. D., Voller, J., Sturc, A., et al. (2011). Pyrazolo[4,3-d]pyrimidine bioisostere of roscovitine: evaluation of a novel selective inhibitor of cyclin-dependent kinases with antiproliferative activity. J. Med. Chem. 54 (8), 2980–2993. doi: 10.1021/jm200064p
Karran, P., Bignami, M. (1994). DNA damage tolerance, mismatch repair and genome instability. Bioessays 16 (11), 833–839. doi: 10.1002/bies.950161110
Kassambara, A., Gourzones-Dmitriev, C., Sahota, S., Reme, T., Moreaux, J., Goldschmidt, H., et al. (2014). A DNA repair pathway score predicts survival in human multiple myeloma: the potential for therapeutic strategy. Oncotarget 5 (9), 2487–2498. doi: 10.18632/oncotarget.1740
Kathawala, R. J., Gupta, P., Ashby, C. R., Jr., Chen, Z. S. (2015). The modulation of ABC transporter-mediated multidrug resistance in cancer: a review of the past decade. Drug Resist Updat. 18, 1–17. doi: 10.1016/j.drup.2014.11.002
Kirschner, K., Melton, D. W. (2010). Multiple roles of the ERCC1-XPF endonuclease in DNA repair and resistance to anticancer drugs. Anticancer Res. 30 (9), 3223–3232.
Kotnis, A., Du, L., Liu, C., Popov, S. W., Pan-Hammarstrom, Q. (2009). Non-homologous end joining in class switch recombination: the beginning of the end. Philos. Trans. R. Soc. Lond. B Biol. Sci. 364 (1517), 653–665. doi: 10.1098/rstb.2008.0196
Kumar, S. K., Laplant, B., Chng, W. J., Zonder, J., Callander, N., Fonseca, R., et al. (2015). Dinaciclib, a novel CDK inhibitor, demonstrates encouraging single-agent activity in patients with relapsed multiple myeloma. Blood 125 (3), 443–448. doi: 10.1182/blood-2014-05-573741
Ladetto, M., Pagliano, G., Ferrero, S., Cavallo, F., Drandi, D., Santo, L., et al. (2010). Major tumor shrinking and persistent molecular remissions after consolidation with bortezomib, thalidomide, and dexamethasone in patients with autografted myeloma. J. Clin. Oncol. 28 (12), 2077–2084. doi: 10.1200/JCO.2009.23.7172
Landau, H. J., Mcneely, S. C., Nair, J. S., Comenzo, R. L., Asai, T., Friedman, H., et al. (2012). The checkpoint kinase inhibitor AZD7762 potentiates chemotherapy-induced apoptosis of p53-mutated multiple myeloma cells. Mol. Cancer Ther. 11 (8), 1781–1788. doi: 10.1158/1535-7163.MCT-11-0949
Li, Y., Trojer, P., Xu, C. F., Cheung, P., Kuo, A., Drury, W. J., et al. (2009). The target of the NSD family of histone lysine methyltransferases depends on the nature of the substrate. J. Biol. Chem. 284 (49), 34283–34295. doi: 10.1074/jbc.M109.034462
Lieber, M. R. (2010). NHEJ and its backup pathways in chromosomal translocations. Nat. Struct. Mol. Biol. 17 (4), 393–395. doi: 10.1038/nsmb0410-393
Lindahl, T. (1993). Instability and decay of the primary structure of DNA. Nature 362 (6422), 709–715. doi: 10.1038/362709a0
Lohr, J. G., Stojanov, P., Carter, S. L., Cruz-Gordillo, P., Lawrence, M. S., Auclair, D., et al. (2014). Widespread genetic heterogeneity in multiple myeloma: implications for targeted therapy. Cancer Cell. 25 (1), 91–101. doi: 10.1016/j.ccr.2013.12.015
Maes, K., De Smedt, E., Lemaire, M., De Raeve, H., Menu, E., Van Valckenborgh, E., et al. (2014). The role of DNA damage and repair in decitabine-mediated apoptosis in multiple myeloma. Oncotarget 5 (10), 3115–3129. doi: 10.18632/oncotarget.1821
Mahtouk, K., Moreaux, J., Hose, D., Reme, T., Meissner, T., Jourdan, M., et al. (2010). Growth factors in multiple myeloma: a comprehensive analysis of their expression in tumor cells and bone marrow environment using Affymetrix microarrays. BMC Cancer. 10, 198. doi: 10.1186/1471-2407-10-198
Marchesini, M., Ogoti, Y., Fiorini, E., Aktas Samur, A., Nezi, L., D'anca, M., et al. (2017). ILF2 Is a Regulator of RNA Splicing and DNA Damage Response in 1q21-Amplified Multiple Myeloma. Cancer Cell. 32 (1), 88–100 e106. doi: 10.1016/j.ccell.2017.05.011
Martinez-Garcia, E., Popovic, R., Min, D. J., Sweet, S. M., Thomas, P. M., Zamdborg, L., et al. (2010). The MMSET histone methyl transferase switches global histone methylation and alters gene expression in t(4;14) multiple myeloma cells. Blood 117, 211–220 doi: 10.1182/blood-2010-07-298349
Martinez-Lopez, J., Blade, J., Mateos, M. V., Grande, C., Alegre, A., Garcia-Larana, J., et al. (2011). Long-term prognostic significance of response in multiple myeloma after stem cell transplantation. Blood 118 (3), 529–534. doi: 10.1182/blood-2011-01-332320
McNeill, D. R., Lam, W., DeWeese, T. L., Cheng, Y. C., Wilson, D. M. 3rd. (2009). Impairment of APE1 function enhances cellular sensitivity to clinically relevant alkylators and antimetabolites. Mol. Cancer Res. 7 (6), 897–906. doi: 10.1158/1541-7786.MCR-08-0519
Mladenov, E., Iliakis, G. (2011). Induction and repair of DNA double strand breaks: the increasing spectrum of non-homologous end joining pathways. Mutation Res. 711 (1-2), 61–72. doi: 10.1016/j.mrfmmm.2011.02.005
Moreau, P., Avet-Loiseau, H., Facon, T., Attal, M., Tiab, M., Hulin, C., et al. (2011). Bortezomib plus dexamethasone versus reduced-dose bortezomib, thalidomide plus dexamethasone as induction treatment before autologous stem cell transplantation in newly diagnosed multiple myeloma. Blood. 118 (22), 5752–5758. doi: 10.1182/blood-2011-05-355081
Muniandy, P. A., Liu, J., Majumdar, A., Liu, S. T., Seidman, M. M. (2010). DNA interstrand crosslink repair in mammalian cells: step by step. Crit. Rev. Biochem. Mol. Biol. 45 (1), 23–49. doi: 10.3109/10409230903501819
Murakawa, Y., Sonoda, E., Barber, L. J., Zeng, W., Yokomori, K., Kimura, H., et al. (2007). Inhibitors of the proteasome suppress homologous DNA recombination in mammalian cells. Cancer Res. 67 (18), 8536–8543. doi: 10.1158/0008-5472.CAN-07-1166
Neben, K., Lokhorst, H. M., Jauch, A., Bertsch, U., Hielscher, T., Van Der Holt, B., et al. (2012). Administration of bortezomib before and after autologous stem cell transplantation improves outcome in multiple myeloma patients with deletion 17p. Blood. 119 (4), 940–948. doi: 10.1182/blood-2011-09-379164
Neri, P., Ren, L., Azab, A. K., Brentnall, M., Gratton, K., Klimowicz, A. C., et al. (2011a). Integrin beta7-mediated regulation of multiple myeloma cell adhesion, migration, and invasion. Blood. 117 (23), 6202–6213. doi: 10.1182/blood-2010-06-292243
Neri, P., Ren, L., Gratton, K., Stebner, E., Johnson, J., Klimowicz, A., et al. (2011b). Bortezomib-induced “BRCAness” sensitizes multiple myeloma cells to PARP inhibitors. Blood. 118 (24), 6368–6379. doi: 10.1182/blood-2011-06-363911
Niesvizky, R., Badros, A. Z., Costa, L. J., Ely, S. A., Singhal, S. B., Stadtmauer, E. A., et al. (2015). Phase 1/2 study of cyclin-dependent kinase (CDK)4/6 inhibitor palbociclib (PD-0332991) with bortezomib and dexamethasone in relapsed/refractory multiple myeloma. Leuk. Lymphoma. 56 (12), 3320–3328. doi: 10.3109/10428194.2015.1030641
Noborio-Hatano, K., Kikuchi, J., Takatoku, M., Shimizu, R., Wada, T., Ueda, M., et al. (2009). Bortezomib overcomes cell-adhesion-mediated drug resistance through downregulation of VLA-4 expression in multiple myeloma. Oncogene 28 (2), 231–242. doi: 10.1038/onc.2008.385
Nussenzweig, A., Nussenzweig, M. C. (2007). A backup DNA repair pathway moves to the forefront. Cell 131 (2), 223–225. doi: 10.1016/j.cell.2007.10.005
O’Connor, M. J. (2015). Targeting the DNA Damage Response in Cancer. Mol. Cell. 60 (4), 547–560. doi: 10.1016/j.molcel.2015.10.040
Orta, M. L., Hoglund, A., Calderon-Montano, J. M., Dominguez, I., Burgos-Moron, E., Visnes, T., et al. (2014). The PARP inhibitor Olaparib disrupts base excision repair of 5-aza-2’-deoxycytidine lesions. Nucleic Acids Res. 42 (14), 9108–9120. doi: 10.1093/nar/gku638
Osborne, M. R., Wilman, D. E., Lawley, P. D. (1995). Alkylation of DNA by the nitrogen mustard bis(2-chloroethyl)methylamine. Chem. Res. Toxicol. 8 (2), 316–320. doi: 10.1021/tx00044a018
Pai, C. C., Deegan, R. S., Subramanian, L., Gal, C., Sarkar, S., Blaikley, E. J., et al. (2014). A histone H3K36 chromatin switch coordinates DNA double-strand break repair pathway choice. Nat. Commun. 5, 4091. doi: 10.1038/ncomms5091
Park, S., Lee, S. J., Jung, C. W., Jang, J. H., Kim, S. J., Kim, W. S., et al. (2014). DCEP for relapsed or refractory multiple myeloma after therapy with novel agents. Ann. Hematol. 93 (1), 99–105. doi: 10.1007/s00277-013-1952-5
Pei, H., Zhang, L., Luo, K., Qin, Y., Chesi, M., Fei, F., et al. (2011). MMSET regulates histone H4K20 methylation and 53BP1 accumulation at DNA damage sites. Nature 470 (7332), 124–128. doi: 10.1038/nature09658
Pei, H., Wu, X., Liu, T., Yu, K., Jelinek, D. F., Lou, Z. (2013). The histone methyltransferase MMSET regulates class switch recombination. J. Immunol. 190 (2), 756–763. doi: 10.4049/jimmunol.1201811
Pfister, S. X., Ahrabi, S., Zalmas, L. P., Sarkar, S., Aymard, F., Bachrati, C. Z., et al. (2014). SETD2-dependent histone H3K36 trimethylation is required for homologous recombination repair and genome stability. Cell Rep. 7 (6), 2006–2018. doi: 10.1016/j.celrep.2014.05.026
Podar, K., Chauhan, D., Anderson, K. C. (2009). Bone marrow microenvironment and the identification of new targets for myeloma therapy. Leukemia 23 (1), 10–24. doi: 10.1038/leu.2008.259
Popovic, R., Martinez-Garcia, E., Giannopoulou, E. G., Zhang, Q., Zhang, Q., Ezponda, T., et al. (2014). Histone methyltransferase MMSET/NSD2 alters EZH2 binding and reprograms the myeloma epigenome through global and focal changes in H3K36 and H3K27 methylation. PLoS Genet. 10 (9), e1004566. doi: 10.1371/journal.pgen.1004566
Poruchynsky, M. S., Komlodi-Pasztor, E., Trostel, S., Wilkerson, J., Regairaz, M., Pommier, Y., et al. (2015). Microtubule-targeting agents augment the toxicity of DNA-damaging agents by disrupting intracellular trafficking of DNA repair proteins. Proc. Natl. Acad. Sci. U.S.A. 112 (5), 1571–1576. doi: 10.1073/pnas.1416418112
Raghavan, P., Tumati, V., Yu, L., Chan, N., Tomimatsu, N., Burma, S., et al. (2012). AZD5438, an inhibitor of Cdk1, 2, and 9, enhances the radiosensitivity of non-small cell lung carcinoma cells. Int. J. Radiat. Oncol. Biol. Phys. 84 (4), e507–e514. doi: 10.1016/j.ijrobp.2012.05.035
Ransom, M., Dennehey, B. K., Tyler, J. K. (2010). Chaperoning histones during DNA replication and repair. Cell 140 (2), 183–195. doi: 10.1016/j.cell.2010.01.004
Ray, A., Ravillah, D., Das, D. S., Song, Y., Nordstrom, E., Gullbo, J., et al. (2016). A novel alkylating agent Melflufen induces irreversible DNA damage and cytotoxicity in multiple myeloma cells. Br. J. Haematol. 174 (3), 397–409. doi: 10.1111/bjh.14065
Roddam, P. L., Rollinson, S., O’Driscoll, M., Jeggo, P. A., Jack, A., Morgan, G. J. (2002). Genetic variants of NHEJ DNA ligase IV can affect the risk of developing multiple myeloma, a tumour characterised by aberrant class switch recombination. J. Med. Genet. 39 (12), 900–905. doi: 10.1136/jmg.39.12.900
Roddam, P. L., Allan, J. M., Dring, A. M., Worrillow, L. J., Davies, F. E., Morgan, G. J. (2010). Non-homologous end-joining gene profiling reveals distinct expression patterns associated with lymphoma and multiple myeloma. Br. J. Haematol. 149 (2), 258–262. doi: 10.1111/j.1365-2141.2010.08088.x
Rossi, J. F., Fegueux, N., Lu, Z. Y., Legouffe, E., Exbrayat, C., Bozonnat, M. C., et al. (2005). Optimizing the use of anti-interleukin-6 monoclonal antibody with dexamethasone and 140 mg/m2 of melphalan in multiple myeloma: results of a pilot study including biological aspects. Bone Marrow Transplant 36 (9), 771–779. doi: 10.1038/sj.bmt.1705138
Roussel, M., Moreau, P., Huynh, A., Mary, J. Y., Danho, C., Caillot, D., et al. (2010). Bortezomib and high-dose melphalan as conditioning regimen before autologous stem cell transplantation in patients with de novo multiple myeloma: a phase 2 study of the Intergroupe Francophone du Myelome (IFM). Blood. 115 (1), 32–37. doi: 10.1182/blood-2009-06-229658
Ruffner, H., Jiang, W., Craig, A. G., Hunter, T., Verma, I. M. (1999). BRCA1 is phosphorylated at serine 1497 in vivo at a cyclin-dependent kinase 2 phosphorylation site. Mol. Cell. Biol. 19 (7), 4843–4854. doi: 10.1128/MCB.19.7.4843
San Miguel, J. F., Garcia-Sanz, R., Gonzalez, M., Moro, M. J., Hernandez, J. M., Ortega, F., et al. (1995). A new staging system for multiple myeloma based on the number of S-phase plasma cells. Blood 85 (2), 448–455.
Shah, M. Y., Martinez-Garcia, E., Phillip, J. M., Chambliss, A. B., Popovic, R., Ezponda, T., et al. (2016). MMSET/WHSC1 enhances DNA damage repair leading to an increase in resistance to chemotherapeutic agents. Oncogene. 35, 5905–5915 doi: 10.1038/onc.2016.116
Shaheen, M., Allen, C., Nickoloff, J. A., Hromas, R. (2011). Synthetic lethality: exploiting the addiction of cancer to DNA repair. Blood 117 (23), 6074–6082. doi: 10.1182/blood-2011-01-313734
Shammas, M. A., Shmookler Reis, R. J., Koley, H., Batchu, R. B., Li, C., Munshi, N. C. (2009). Dysfunctional homologous recombination mediates genomic instability and progression in myeloma. Blood 113 (10), 2290–2297. doi: 10.1182/blood-2007-05-089193
Simsek, D., Brunet, E., Wong, S. Y., Katyal, S., Gao, Y., Mckinnon, P. J., et al. (2011). Crucial role for DNA ligase III in mitochondria but not in Xrcc1-dependent repair. Nature 471 (7337), 245–248. doi: 10.1038/nature09794
Sonneveld, P., Schmidt-Wolf, I. G., Van Der Holt, B., El Jarari, L., Bertsch, U., Salwender, H., et al. (2001). Cyclosporin A combined with vincristine, doxorubicin and dexamethasone (VAD) compared with VAD alone in patients with advanced refractory multiple myeloma: an EORTC-HOVON randomized phase III study (06914). Br. J. Haematol. 115 (4), 895–902. doi: 10.1046/j.1365-2141.2001.03171.x
Sonneveld, P., Suciu, S., Weijermans, P., Beksac, M., Neuwirtova, R., Solbu, G., et al. (2012). Bortezomib induction and maintenance treatment in patients with newly diagnosed multiple myeloma: results of the randomized phase III HOVON-65/GMMG-HD4 trial. J. Clin. Oncol. 30 (24), 2946–2955. doi: 10.1200/JCO.2011.39.6820
Soria, G., Polo, S. E., Almouzni, G. (2012). Prime, repair, restore: the active role of chromatin in the DNA damage response. Mol. Cell. 46 (6), 722–734. doi: 10.1016/j.molcel.2012.06.002
Spanswick, V. J., Craddock, C., Sekhar, M., Mahendra, P., Shankaranarayana, P., Hughes, R. G., et al. (2002). Repair of DNA interstrand crosslinks as a mechanism of clinical resistance to melphalan in multiple myeloma. Blood 100 (1), 224–229. doi: 10.1182/blood.V100.1.224
Surget, S., Lemieux-Blanchard, E., Maiga, S., Descamps, G., Le Gouill, S., Moreau, P., et al. (2014). Bendamustine and melphalan kill myelomrough reactive oxygen species production and activation of the p53 pathway and do not overcome resistance to each other. Leuk. Lymphoma. 55 (9), 2165–2173. doi: 10.3109/10428194.2013.871277
Szikriszt, B., Poti, A., Pipek, O., Krzystanek, M., Kanu, N., Molnar, J., et al. (2016). A comprehensive survey of the mutagenic impact of common cancer cytotoxics. Genome Biol. 17, 99. doi: 10.1186/s13059-016-0963-7
Tadi, S. K., Tellier-Lebegue, C., Nemoz, C., Drevet, P., Audebert, S., Roy, S., et al. (2016). PAXX Is an Accessory c-NHEJ Factor that Associates with Ku70 and Has Overlapping Functions with XLF. Cell Rep. 17 (2), 541–555. doi: 10.1016/j.celrep.2016.09.026
Tuzon, C. T., Spektor, T., Kong, X., Congdon, L. M., Wu, S., Schotta, G., et al. (2014). Concerted activities of distinct H4K20 methyltransferases at DNA double-strand breaks regulate 53BP1 nucleation and NHEJ-directed repair. Cell Rep. 8 (2), 430–438. doi: 10.1016/j.celrep.2014.06.013
van de Velde, H. J., Liu, X., Chen, G., Cakana, A., Deraedt, W., Bayssas, M. (2007). Complete response correlates with long-term survival and progression-free survival in high-dose therapy in multiple myeloma. Haematologica 92 (10), 1399–1406. doi: 10.3324/haematol.11534
van Rhee, F., Giralt, S., Barlogie, B. (2014). The future of autologous stem cell transplantation in myeloma. Blood 124 (3), 328–333. doi: 10.1182/blood-2014-03-561985
Vangsted, A., Gimsing, P., Klausen, T. W., Nexo, B. A., Wallin, H., Andersen, P., et al. (2007). Polymorphisms in the genes ERCC2, XRCC3 and CD3EAP influence treatment outcome in multiple myeloma patients undergoing autologous bone marrow transplantation. Int. J. Cancer. 120 (5), 1036–1045. doi: 10.1002/ijc.22411
Vikova, V., Jourdan, M., Robert, N., Requirand, G., Boireau, S., Bruyer, A., et al. (2019). Comprehensive characterization of the mutational landscape in multiple myeloma cell lines reveals potential drivers and pathways associated with tumor progression and drug resistance. Theranostics 9 (2), 540–553. doi: 10.7150/thno.28374
Viziteu, E., Klein, B., Basbous, J., Lin, Y. L., Hirtz, C., Gourzones, C., et al. (2016). RECQ helicases are deregulated in hematological malignancies in association with a prognostic value. Biomark Res. 4, 3. doi: 10.1186/s40364-016-0057-4
Viziteu, E., Klein, B., Basbous, J., et al. (2017). RECQ1 helicase is involved in replication stress survival and drug resistance in multiple myeloma. Leukemia 10, 2104–2113. doi: 10.1038/leu.2017.54
Voorhees, P. M., Orlowski, R. Z., Mulkey, F., Watson, P., Geyer, S., Sanford, B. L., et al. (2015). Long-term outcomes for newly-diagnosed multiple myeloma patients treated with pegylated liposomal doxorubicin and bortezomib: final results of CALGB (Alliance) 10301, a multicentre phase II study. Br. J. Haematol. 171 (3), 373–377. doi: 10.1111/bjh.13592
Wang, Q., Goldstein, M. (2016). Small RNAs recruit chromatin-modifying enzymes MMSET and Tip60 to reconfigure damaged DNA upon double-strand break and Facilitate Repair. Cancer Res. 76 (7), 1904–1915. doi: 10.1158/0008-5472.CAN-15-2334
Weinhold, N., Ashby, C., Rasche, L., Chavan, S. S., Stein, C., Stephens, O. W., et al. (2016). Clonal selection and double-hit events involving tumor suppressor genes underlie relapse in myeloma. Blood 128 (13), 1735–1744. doi: 10.1182/blood-2016-06-723007
Williams, R. S., Williams, J. S., Tainer, J. A. (2007). Mre11-Rad50-Nbs1 is a keystone complex connecting DNA repair machinery, double-strand break signaling, and the chromatin template. Biochem. Cell Biol. 85 (4), 509–520. doi: 10.1139/O07-069
Witte, A. B., Anestal, K., Jerremalm, E., Ehrsson, H., Arner, E. S. (2005). Inhibition of thioredoxin reductase but not of glutathione reductase by the major classes of alkylating and platinum-containing anticancer compounds. Free Radic. Biol. Med. 39 (5), 696–703. doi: 10.1016/j.freeradbiomed.2005.04.025
Wu, W., Nishikawa, H., Fukuda, T., Vittal, V., Asano, M., Miyoshi, Y., et al. (2015). Interaction of BARD1 and HP1 Is Required for BRCA1 Retention at Sites of DNA Damage. Cancer Res. 75 (7), 1311–1321. doi: 10.1158/0008-5472.CAN-14-2796
Xiong, T., Wei, H., Chen, X., Xiao, H. (2015). PJ34, a poly(ADP-ribose) polymerase (PARP) inhibitor, reverses melphalan-resistance and inhibits repair of DNA double-strand breaks by targeting the FA/BRCA pathway in multidrug resistant multiple myeloma cell line RPMI8226/R. Int. J. Oncol. 46 (1), 223–232. doi: 10.3892/ijo.2014.2726
Yang, H. H., Ma, M. H., Vescio, R. A., Berenson, J. R. (2003). Overcoming drug resistance in multiple myeloma: the emergence of therapeutic approaches to induce apoptosis. J. Clin. Oncol. 21 (22), 4239–4247. doi: 10.1200/JCO.2003.06.001
Keywords: multiple myeloma, DNA damage, genomic instability, drug resistance, genotoxic agents
Citation: Gourzones C, Bret C and Moreaux J (2019) Treatment May Be Harmful: Mechanisms/Prediction/Prevention of Drug-Induced DNA Damage and Repair in Multiple Myeloma. Front. Genet. 10:861. doi: 10.3389/fgene.2019.00861
Received: 26 April 2019; Accepted: 19 August 2019;
Published: 18 September 2019.
Edited by:
Meral Beksac, Ankara University, TurkeyReviewed by:
Anders Waage, Norwegian University of Science and Technology, NorwaySergio Roa, University of Navarra, Spain
Copyright © 2019 Gourzones, Bret and Moreaux. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Jerome Moreaux, jerome.moreaux@igh.cnrs.fr