Neha Gogia
Meghana Tare
Ramakrishnan Kannan
Amit Singh- 1Department of Genetics, Yale School of Medicine, Yale University, New Haven, CT, United States
- 2Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, India
- 3Boyer Centre of Molecular Medicine, Yale School of Medicine, Yale University, New Haven, CT, United States
- 4Department of Biology, University of Dayton, Dayton, OH, United States
- 5Premedical Program, University of Dayton, Dayton, OH, United States
- 6Center for Tissue Regeneration and Engineering at Dayton (TREND), University of Dayton, Dayton, OH, United States
- 7The Integrative Science and Engineering Center, University of Dayton, Dayton, OH, United States
- 8Center for Genomic Advocacy (TCGA), Indiana State University, Terre Haute, IN, United States
Editorial on the Research Topic
Protein misfolding, altered mechanisms and neurodegeneration
Neurodegenerative diseases (NDs) like Alzheimer's disease (AD), Parkinson's disease (PD), Amyotrophic lateral sclerosis (ALS), Frontotemporal lobe degeneration (FTLD), Polyglutamine diseases such as Huntington's disease (HD), Spinocerebellar ataxias (SCAs) etc., are a group of debilitating disorders that affects millions of people worldwide and have no cure to-date. Despite the advancement in our understanding of molecular and genetic mechanisms underlying these NDs, only a limited symptom-based treatment options are available. As the life expectancy increases there is an increase in the number of ND patients, which will seriously challenge the availability of resources and will impact a nation's economy. There is an urgent need to develop an affordable healthcare system and find effective treatment options to provide better clinical regimens to cure these diseases. NDs affect neurons, neuronal connections associated with memory, cognition, thinking, strength, sensation, movements, learning, co-ordination, and other abilities. Although the causative factors of NDs varies from one to another and the differences in the disease symptoms could be many, these diseases share some common features. One of the common pathological hallmarks among the most NDs is aggregation or deposition of misfolded proteins. Compelling evidence from neuropathological, genetic, animal models studies, and other approaches have strongly supported the fact that accumulation of misfolded protein aggregates triggers a series of detrimental events, which results in synaptic alterations, neuronal cell loss, and significantly contributes toward disease pathogenesis.
This Research Topic highlights the new approaches employed to develop therapeutics, which can effectively block or slow down the onset or progression of these fatal NDs. This manuscripts collection highlights the current advances in the field of neurodegenerative disorders, which may help in addressing some of the unanswered questions pertaining to this Research Topic. This collection of manuscripts is divided into three vital categories: (1) Disease mechanisms, (2) Therapeutic perspectives, and (3) Animal model(s). We hope that this topic may help discern the gaps, connect the missing links, improve our current understanding, knowledge related to this topic and open new avenues of research focuses to improve current treatments options against these deadly yet incurable disorders.
Disease mechanisms
Among the many fatal NDs, Alzheimer's Disease (AD) is the most prevalent neurological disorder that affects around 6.5 million Americans of age group 65 and older today (2022). This number is expected to increase to 13.8 million by the year 2060, unless proper therapeutics to cure, prevent, or slow down the progression of AD are not developed (2022). Current understanding of the field is that AD occurs due to the presence of aggregates as observed in the brain parenchyma of the dementia patients described by Dr. Alois Alzheimer in his pioneering work (Alzheimer et al., 1995). These aggregates are now known as extracellular deposition of Amyloid-beta (Aβ) plaques, neurofibrillary tangles (NFT), intracellular accumulation of hyper-phosphorylated tau (p-tau) proteins (Selkoe, 2004; Small and Cappai, 2006; Yeates et al., 2019). Though the tau biology has been extensively studied in the field of AD and other NDs, such as, FTLD, however, our current understanding about the precise role of tau in the nucleus and especially the mechanism by which the tau modulates the transcription function has remain limited. In this context, a recent investigation utilized human and mouse brains tissue samples to investigate the effect of changes in the transcriptomic and alternative polyadenylation profiles, modulated by wild-type (WT) and mutant P301L tau protein (Montalbano et al.). The study suggested that tau modulates the gene expression of the transcripts associated with chromatin remodeling and splicing complexes (Montalbano et al.). The WT and mutant P301L tau were found to differentially regulate the transcription and alternative polyadenylation (APA) profiles; and P301L mutation was found to affect the transcription mediated by tau protein (Montalbano et al.).
Another age-associated protein misfolding disorder and a common motor neuron disease is the Amyotrophic Lateral Sclerosis (ALS). Dominant missense mutation in superoxide dismutase 1 (SOD1) and aggregation of misfolded mutant SOD1 has been associated with ALS pathogenesis (Deng et al., 1993; Rosen et al., 1993). Previously it has been shown that the turnover of mutant SOD1 protein(s) is more rapid as compared to the wild-type SOD1 (Hoffman et al., 1996). However, the exact effect of aggregation of SOD1 protein on turnover rate of SOD1 protein is yet to be explored fully. A previous study conducted to examine the rate of SOD1 turnover using mouse spinal cord reported no difference with respect to the amount of aggregation and level of disease progression (Farr et al., 2011). However, the rate of turnover in individual cells containing inclusions of aggregates also remained unexplored. Farrawell and Yerbury utilized NSC-34 cells and investigated this aspect. Based on the findings from their study, the group supported the notion that turnover of mutant SOD1 is faster in comparison to the wild-type SOD1 (Farrawell and Yerbury). However, the study also reported that the turnover and synthesis of SOD1 is impaired in the cells containing insoluble SOD1A4V aggregates following impairment of ubiquitin–proteasome system (UPS), and thereby highlighted the role of UPS dysfunction in ALS pathogenesis (Farrawell and Yerbury).
In this Research Topic, a review by Wodrich et al. provides deeper insights into the physiology of unfolded protein response of endoplasmic reticulum (UPRER) and mitochondrial UPR (UPRmt). The review discusses the crucial roles played by UPRER and UPRmt signaling and changes in context of aging and neurodegeneration (Wodrich et al.). Furthermore, the review also highlights the therapeutic strategies targeting UPRER and UPRmt, that may help improve human health conditions (Wodrich et al.).
Another review in this Research Topic by de Mena et al. highlighted the complex interplay between TAR DNA binding protein-43 (TDP-43, a nuclear RNA/DNA-binding protein) and endoplasmic reticulum (ER) stress. TDP-43 proteinopathy is a major pathological hallmark of ALS and FTLD (Arai et al., 2006; Neumann et al., 2006; Kabashi et al., 2008; Sreedharan et al., 2008; Borroni et al., 2009). Though our current understanding on the physiological roles played by TDP-43 has significantly increased, however, the exact molecular mechanism(s) of action that imparts pathogenic nature to TDP-43, has remained unclear. An in-depth review by de Mena et al., focuses on TDP-43 models and carefully investigates the available literature for the data associated with ER stress and TDP-43 pathology. This group highlighted and discussed the role of TDP-43 WT or mutant overexpression, mislocalization in the activation of UPR and provide rigorous insights on the implications of UPR activation in TDP-43 proteinopathies (de Mena et al.). The review points out the underexplored research areas, highlights the key mechanistic and therapeutic questions which are worthy of investigation. Furthermore, the review also discusses the effect of ER stress and UPR activation in TDP-43 aggregation, post-translational modifications and its interest as potential therapeutic target (de Mena et al.).
Therapeutic perspectives
A general notion in the field of AD is that the insoluble protein fibrils contribute toward AD etiology and pathophysiology. However, some studies have also suggested that the soluble oligomers or protofibrils can also be toxic, which makes them a target for future disease modifying therapies that can effectively treat AD (Usenovic et al., 2015; Siddiqi et al., 2019). Use of molecules that can dissolve these oligomers or protofibrils, insoluble mature fibrils may potentially help in blocking the onset or progression of AD. Taking this into consideration, Kaku et al. utilized a 179 amino acid long, 20-kDa, cytosolic, mammalian protein (highly conserved) known as Fas Apoptosis Inhibitory Molecule (FAIM) (Schneider et al., 1999). In a study conducted earlier by the same group in year 2020, showed that FAIM decreases the aggregation of mutant SOD1 (ALS associated) (Kaku et al., 2020), however, whether this activity of FAIM is limited to ALS or can also be extrapolated to other NDs (especially AD) remained uncertain. Kaku et al. thus investigated the effect of FAIM on pathogenic Aβ oligomers/fibrils (AD associated) using in vitro and cell free system. Results from their study showed that FAIM knockout (KO) cells accumulates the insoluble Aβ fibrils/aggregates (Kaku et al.). Their study also reported that recombinant human FAIM solubilizes the amyloid-β fibrils, generate monomers and suppresses the protein fibrillization/aggregation in a cell free system (Kaku et al.). The recombinant human FAIM was observed to prevent Aβ fibrils, as evidenced from Neuro 2A cells (Kaku et al.). Altogether, the study suggested that FAIM (a single and unique metazoan ATP independent protein) prevents aggregation, induces dissociation of aggregated proteins and is an attractive possibility for therapeutic intervention to treat AD or related dementias (Kaku et al.).
Another common neurological disorder, Parkinson's Disease (or PD, age-associated ND) was initially characterized by Dr. James Parkinson in the year 1817 (Parkinson, 1817). Alpha-synuclein (α-synuclein) misfolding and intracellular aggregates formation are well-known to be associated with PD pathology (Spillantini et al., 1997). Accumulation of a-synuclein and loss of dopaminergic neurons in the substantia nigra pars compacta (SNpc) of the brain are the characteristics neuropathological hallmarks of PD (Kholodilov et al., 1999). An efficient drug delivery to the brain with the drug possessing the capacity to effectively cross the blood brain barrier (BBB) is one of the greatest challenges in NDs, including PD. Use of nanoparticles has gained lot of attention of the researchers in this context. However, the exact effects or implications of using the nanoparticles on α-synuclein aggregates, remained unclear. Previous studies have shown that the recombinant soluble α-synuclein can be induced to form aggregates in the presence of nanoparticles in salt solution (Alvarez et al., 2013; Mohammadi and Nikkhah, 2017; Tahaei Gilan et al., 2019). Thus, to investigate whether the nanoparticles would show a similar effect in vitro, Jiang et al. utilized the cell culture model of PD. Results from their study showed that nanoparticles could induce the formation of α-synuclein inclusions that is in part could be dependent on the endo-lysosomal impairment and affinity of α-synuclein to the nanoparticles. Overall, the study suggested that caution should be used while using the nanoparticles to treat PD (Jiang et al.).
Animal model(s)
Besides understanding the disease mechanisms, another arduous challenge for the researchers studying the human NDs is to recapitulate the exact life stage-matched animal models. Several excellent animal models have been developed and extensively utilized by the researchers to study NDs (Singh and Irvine, 2012). Among them, Drosophila melanogaster (a.k.a. fruit fly), an invertebrate insect model, has proved to be an excellent model to study NDs. This versatility of Drosophila model is due to its fully sequenced genome, shorter life cycle, conservation of the basic genetic machinery, less genetic redundancy, presence of orthologs, or homologs of human disease genes etc. Drosophila has been used to model NDs like AD (Tare et al., 2011; Cutler et al., 2015; Sarkar et al., 2018; Deshpande et al., 2019, 2021; Yeates et al., 2019; Irwin et al., 2020), PD (Dawson et al., 2010), ALS (Casci and Pandey, 2015; Gogia et al., 2020), HD (Marsh et al., 2003) etc. Keeping in mind the pathological hallmarks of PD and the importance of using relevant animal models to study PD, Ayajuddin et al., developed and utilized an adult life stage-specific rotenone mediated fly model of PD. It is noteworthy that, the vulnerability of PD is exacerbated by aging, genetic basis, or exposure to the environmental toxins such as pesticides: paraquat and rotenone (Tanner et al., 2011). The Drosophila model of PD by Ayajuddin et al., exhibited mobility defects, showed inhibition of mitochondrial complex I activity and dysfunction of dopaminergic (DAergic) neurons. The study also reported reduction in the synthesis of rate limiting enzyme: tyrosine hydroxylase (TH), alterations in the levels of dopamine (DA), as well as its metabolites in the brain (Ayajuddin et al.). Overall, this study indicated that the PD-associated phenotypes validate the robustness of their fly model of PD and that this model would offer great help in discovering the life stage-specific genetic targets of small molecules that can offer DAergic neuroprotection (Ayajuddin et al.). This may potentially help in the development of therapeutics that can effectively treat PD in future (Ayajuddin et al.). Additionally, an another study conducted by Rai and Tapadia also utilized fruit fly model to establish the functional link between heat shock cognate (Hsc70), innate immune response (NF-kB) and neurodegeneration under polyQ conditions.
Conclusion
In conclusion, the research aimed at elucidating the cellular and molecular commonalities among the NDs and targeting them for therapeutics development, holds great potential. Being a common hallmark among the many NDs, it is important to deeply understand the complex biology behind protein misfolding and the cross talk between misfolded proteins, neurodegeneration, and NDs. The articles (including research and reviews) that build up this Research Topic provides deeper insights into the mechanisms that contribute toward NDs. Articles presented in the therapeutics section discusses the new, effective target(s), and compelling strategies for therapeutic intervention that may help in early diagnosis or treatment of diseases. Findings from these studies may potentially be extrapolated from laboratory setting to the translational or clinical research. Lastly, this Research Topic also covers an article pertaining to the use of an interesting in vivo (fly) model of PD that recapitulates the pathological features of PD and may offer great hope to the development of future therapeutics. This Research Topic in Frontiers in molecular neuroscience emphasizes the need of detailed understanding of protein aggregation biology required for the development of efficient therapeutics that may either cure or help slow down the onset or progression of NDs and may substantially contribute toward improving the quality life of ND patients.
Altogether, we strongly believe that this collection will help us appreciate and acknowledge the new developments in the field of NDs and how new strategies can help find the cure for these fatal diseases. We hope that the readers enjoy the broad spectrum of topics covered in this collection.
Author contributions
NG and AS developed the concept and contributed to manuscript writing and editing. MT and RK were involved in reviewing, editing, and providing comments on the manuscript. All authors approved the final version of the manuscript for publication.
Funding
AS was supported by 1RO1EY032959-01, 3RO1EY032959-02S1 from the National Institutes of Health, Schuellein Chair Endowment Fund, and start-up support from the University of Dayton.
Acknowledgments
We would like to thank the team of Frontiers in Molecular Neuroscience for the invitation to host and guest edit this Research Topic, as well as for their constant support throughout this project. This issue would not have been possible without the contributions of all the authors who very generously agreed and submitted their manuscripts in accordance with the area of interest of this topic. We are also extremely grateful to all the reviewers for their time in peer-reviewing all the manuscripts that make up this topic.
Conflict of interest
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.
Publisher's note
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.
References
(2022). Alzheimer's disease facts and figures. Alzheimers Dement. 18, 700–789. doi: 10.1002/alz.12638
Alvarez, Y. D., Fauerbach, J. A., Pellegrotti, J. V., Jovin, T. M., Jares-Erijman, E. A., Stefani, F. D., et al. (2013). Influence of gold nanoparticles on the kinetics of alpha-synuclein aggregation. Nano Lett. 13, 6156–6163. doi: 10.1021/nl403490e
Alzheimer, A., Stelzmann, R. A., Schnitzlein, H. N., and Murtagh, F. R. (1995). An English translation of Alzheimer's 1907 paper, “Uber eine eigenartige Erkankung der Hirnrinde”. Clin. Anat. 8, 429–431. doi: 10.1002/ca.980080612
Arai, T., Hasegawa, M., Akiyama, H., Ikeda, K., Nonaka, T., Mori, H., et al. (2006). TDP-43 is a component of ubiquitin-positive tau-negative inclusions in frontotemporal lobar degeneration and amyotrophic lateral sclerosis. Biochem. Biophys. Res. Commun. 351, 602–611. doi: 10.1016/j.bbrc.2006.10.093
Borroni, B., Bonvicini, C., Alberici, A., Buratti, E., Agosti, C., Archetti, S., et al. (2009). Mutation within TARDBP leads to frontotemporal dementia without motor neuron disease. Hum. Mutat. 30, E974–983. doi: 10.1002/humu.21100
Casci, I., and Pandey, U. B. (2015). A fruitful endeavor: modeling ALS in the fruit fly. Brain Res. 1607, 47–74. doi: 10.1016/j.brainres.2014.09.064
Cutler, T., Sarkar, A., Moran, M., Steffensmeier, A., Puli, O. R., Mancini, G., et al. (2015). Drosophila eye model to study neuroprotective role of CREB binding protein (CBP) in Alzheimer's disease. PLoS ONE 10, e0137691. doi: 10.1371/journal.pone.0137691
Dawson, T. M., Ko, H. S., and Dawson, V. L. (2010). Genetic animal models of Parkinson's disease. Neuron 66, 646–661. doi: 10.1016/j.neuron.2010.04.034
Deng, H. X., Hentati, A., Tainer, J. A., Iqbal, Z., Cayabyab, A., Hung, W. Y., et al. (1993). Amyotrophic lateral sclerosis and structural defects in Cu,Zn superoxide dismutase. Science 261, 1047–1051. doi: 10.1126/science.8351519
Deshpande, P., Gogia, N., Chimata, A. V., and Singh, A. (2021). Unbiased automated quantitation of ROS signals in live retinal neurons of Drosophila using Fiji/ImageJ. BioTechniques 71, 416–424. doi: 10.2144/btn-2021-0006
Deshpande, P., Gogia, N., and Singh, A. (2019). Exploring the efficacy of natural products in alleviating Alzheimer's disease. Neural Regen. Res. 14, 1321–1329. doi: 10.4103/1673-5374.253509
Farr, G. W., Ying, Z., Fenton, W. A., and Horwich, A. L. (2011). Hydrogen-deuterium exchange in vivo to measure turnover of an ALS-associated mutant SOD1 protein in spinal cord of mice. Protein Sci. 20, 1692–1696. doi: 10.1002/pro.700
Gogia, N., Sarkar, A., Mehta, A. S., Ramesh, N., Deshpande, P., Kango-Singh, M., et al. (2020). Inactivation of Hippo and cJun-N-terminal Kinase (JNK) signaling mitigate FUS mediated neurodegeneration in vivo. Neurobiol. Dis. 140, 104837. doi: 10.1016/j.nbd.2020.104837
Hoffman, E. K., Wilcox, H. M., Scott, R. W., and Siman, R. (1996). Proteasome inhibition enhances the stability of mouse Cu/Zn superoxide dismutase with mutations linked to familial amyotrophic lateral sclerosis. J. Neurol. Sci. 139, 15–20. doi: 10.1016/0022-510X(96)00031-7
Irwin, M., Tare, M., Singh, A., Puli, O. R., Gogia, N., Riccetti, M., et al. (2020). A positive feedback loop of hippo- and c-jun-amino-terminal kinase signaling pathways regulates amyloid-beta-mediated neurodegeneration. Front. Cell. Dev. Biol. 8, 117. doi: 10.3389/fcell.2020.00117
Kabashi, E., Valdmanis, P. N., Dion, P., Spiegelman, D., McConkey, B. J., Vande Velde, C., et al. (2008). TARDBP mutations in individuals with sporadic and familial amyotrophic lateral sclerosis. Nat. Genet. 40, 572–574. doi: 10.1038/ng.132
Kaku, H., Ludlow, A. V., Gutknecht, M. F., and Rothstein, T. L. (2020). FAIM opposes aggregation of mutant SOD1 that typifies some forms of familial amyotrophic lateral sclerosis. Front. Neurosci. 14, 110. doi: 10.3389/fnins.2020.00110
Kholodilov, N. G., Neystat, M., Oo, T. F., Lo, S. E., Larsen, K. E., Sulzer, D., et al. (1999). Increased expression of rat synuclein in the substantia nigra pars compacta identified by mRNA differential display in a model of developmental target injury. J. Neurochem. 73, 2586–2599. doi: 10.1046/j.1471-4159.1999.0732586.x
Marsh, J. L., Pallos, J., and Thompson, L. M. (2003). Fly models of Huntington's disease. Hum. Mol. Genet. 12, R187–R193. doi: 10.1093/hmg/ddg271
Mohammadi, S., and Nikkhah, M. (2017). TiO2 nanoparticles as potential promoting agents of fibrillation of alpha-synuclein, a parkinson's disease-related protein. Iran. J. Biotechnol. 15, 87–94. doi: 10.15171/ijb.1519
Neumann, M., Sampathu, D. M., Kwong, L. K., Truax, A. C., Micsenyi, M. C., Chou, T. T., et al. (2006). Ubiquitinated TDP-43 in frontotemporal lobar degeneration and amyotrophic lateral sclerosis. Science 314, 130–133. doi: 10.1126/science.1134108
Rosen, D. R., Siddique, T., Patterson, D., Figlewicz, D. A., Sapp, P., Hentati, A., et al. (1993). Mutations in Cu/Zn superoxide dismutase gene are associated with familial amyotrophic lateral sclerosis. Nature 362, 59–62. doi: 10.1038/362059a0
Sarkar, A., Gogia, N., Glenn, N., Singh, A., Jones, G., Powers, N., et al. (2018). A soy protein Lunasin can ameliorate amyloid-beta 42 mediated neurodegeneration in Drosophila eye. Sci. Rep. 8, 13545. doi: 10.1038/s41598-018-31787-7
Schneider, T. J., Fischer, G. M., Donohoe, T. J., Colarusso, T. P., and Rothstein, T. L. (1999). A novel gene coding for a Fas apoptosis inhibitory molecule (FAIM) isolated from inducibly Fas-resistant B lymphocytes. J. Exp. Med. 189, 949–956. doi: 10.1084/jem.189.6.949
Selkoe, D. J. (2004). Alzheimer disease: mechanistic understanding predicts novel therapies. Ann. Intern. Med. 140, 627–638. doi: 10.7326/0003-4819-140-8-200404200-00047
Siddiqi, M. K., Majid, N., Malik, S., Alam, P., and Khan, R. H. (2019). Amyloid oligomers, protofibrils and fibrils. Subcell. Biochem. 93, 471–503. doi: 10.1007/978-3-030-28151-9_16
Singh, A., and Irvine, K. D. (2012). Drosophila as a model for understanding development and disease. Dev. Dyn. 241, 1–2. doi: 10.1002/dvdy.23712
Small, D. H., and Cappai, R. (2006). Alois Alzheimer and Alzheimer's disease: a centennial perspective. J. Neurochem. 99, 708–710. doi: 10.1111/j.1471-4159.2006.04212.x
Spillantini, M. G., Schmidt, M. L., Lee, V. M., Trojanowski, J. Q., Jakes, R., Goedert, M., et al. (1997). Alpha-synuclein in Lewy bodies. Nature 388, 839–840. doi: 10.1038/42166
Sreedharan, J., Blair, I. P., Tripathi, V. B., Hu, X., Vance, C., Rogelj, B., et al. (2008). TDP-43 mutations in familial and sporadic amyotrophic lateral sclerosis. Science 319, 1668–1672. doi: 10.1126/science.1154584
Tahaei Gilan, S. S., Yahya Rayat, D., Mustafa, T. A., Aziz, F. M., Shahpasand, K., Akhtari, K., et al. (2019). alpha-synuclein interaction with zero-valent iron nanoparticles accelerates structural rearrangement into amyloid-susceptible structure with increased cytotoxic tendency. Int. J. Nanomedicine 14, 4637–4648. doi: 10.2147/IJN.S212387
Tanner, C. M., Kamel, F., Ross, G. W., Hoppin, J. A., Goldman, S. M., Korell, M., et al. (2011). Rotenone, paraquat, and Parkinson's disease. Environ. Health Perspect. 119, 866–872. doi: 10.1289/ehp.1002839
Tare, M., Modi, R. M., Nainaparampil, J. J., Puli, O. R., Bedi, S., Fernandez-Funez, P., et al. (2011). Activation of JNK signaling mediates amyloid-ss-dependent cell death. PLoS ONE 6, e24361. doi: 10.1371/journal.pone.0024361
Usenovic, M., Niroomand, S., Drolet, R. E., Yao, L., Gaspar, R. C., Hatcher, N. G., et al. (2015). Internalized tau oligomers cause neurodegeneration by inducing accumulation of pathogenic tau in human neurons derived from induced pluripotent stem cells. J. Neurosci. 35, 14234–14250. doi: 10.1523/JNEUROSCI.1523-15.2015
Keywords: Protein misfolding, disease mechanisms, neurodegeneration, human neurodegenerative diseases, proteinopathies, therapeutics, animal models, Drosophila
Citation: Gogia N, Tare M, Kannan R and Singh A (2023) Editorial: Protein misfolding, altered mechanisms and neurodegeneration. Front. Mol. Neurosci. 16:1134855. doi: 10.3389/fnmol.2023.1134855
Received: 31 December 2022; Accepted: 16 January 2023;
Published: 01 February 2023.
Edited and reviewed by: Kameswara Rao Badri, Morehouse School of Medicine, United States
Copyright © 2023 Gogia, Tare, Kannan and Singh. 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: Amit Singh, 
YXNpbmdoMSYjeDAwMDQwO3VkYXl0b24uZWR1; Neha Gogia, bmVoYS5nb2dpYSYjeDAwMDQwO3lhbGUuZWR1