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CASE REPORT article

Front. Endocrinol., 08 May 2024
Sec. Clinical Diabetes

Case report: GLP1RA for the treatment of diabetes in liver transplanted people. Do they increase the risk of pancreatitis?

  • Endocrinology Unit, Fondazione IRCCS Ca’ Granda – Ospedale Maggiore Policlinico Milano, Milan, Italy

The incidence of acute pancreatitis (AP) in liver transplanted people is reported to be 1.5-8%. On the other hand, the evidence for a causal relationship between glucagon-like peptide 1 receptor agonists (GLP1RAs) and pancreatitis in people with type 2 diabetes is still weak. In addition, there are currently no data on a possible increased risk of AP in liver-transplanted individuals with diabetes treated with GLP1RAs. In a population of liver-transplanted individuals with diabetes receiving GLP1RA-based therapy, we reported an incidence of AP of 3.0% (two subjects). No cases were reported in liver-transplanted individuals with diabetes receiving SGLT2 inhibitors, insulin or metformin, neither in kidney or lung-transplanted patients treated with GLP1RAs. In both patients with AP, the only additional risk factor for its development was a history of re-transplantation (liver or combined kidney/liver). For this reason, we suggest particular caution when considering GLP1RAs-based therapies in liver transplanted patients with multiple risk factors for AP, such as a history of repeated and complex abdominal surgery.

Introduction

Acute pancreatitis (AP) is one of the most common gastrointestinal diseases (1, 2). Its incidence varies from 5-73 cases/10000 individuals (2, 3). Overall mortality is up to 5% (4) and gallstones, alcohol abuse, hypertriglyceridemia, endoscopic retrograde cholangiopancreatography (ERCP), genetics, drugs and pancreatic duct injuries (59) are well established risk factors. The epidemiology of AP is well characterized in the general population, but more conflicting data are available for solid organ transplanted individuals. Graham D. et al, in a recent review, reported an incidence of 1-35%, with the highest rates in kidney and intestinal transplantation in pediatric populations (10).

In organ transplanted patients, a lower age (11), hypercalcemia (12), alcohol consumption (13), gallstones (12), congenital abnormalities of the pancreas (12), viral infections (CMV; VZV; HBV) (12) and pre-transplant history of AP (11) have been reported as major risk factors. Moreover, several immunosuppressant therapies such as tacrolimus, cyclosporine, azathioprine, mycophenolate mofetil have been mentioned as possible risk factors (11, 1416).

Actually, the incidence of AP in liver transplanted people is reported to be 1.5-8% (1719) and a recent study by Hujova A. and colleagues reported, as well demonstrated risk factors, previous intra-abdominal surgery, HBV infection and post-transplant biliary complications needing ERCP (20).

GLP1 RAs have become first line treatments for DM2 in recent years, due to their widely recognized beneficial effects on glycemic control, their cardio-renal protection and weight loss (2126). For all these reasons mentioned above, the 2024 American Diabetes Association Guidelines suggest that, in adults with type 2 diabetes and established/high risk or atherosclerotic cardiovascular disease (ASCVD), the treatment plan should include a GLP1RA agent with proven cardiovascular protection (27).

In 2008, the US Food and Drug Administration (FDA) suggested a potential association between exenatide and AP referring to 30 case reports of AP (28). Since then, warnings about the risk of AP have continued to grow, resulting in a global discussion on this issue (29, 30). Several documents have been published discussing the possible risk of AP in people receiving incretin-based therapies (3135).

A potential link between GLP1RAs and AP was hypnotized basing on data from experimental studies on animals. The possible underlying mechanism proposed was that the chronic hyperstimulation of exocrine pancreas by GLP1RAs. Several pharmacovigilance reports have endorsed this hypothesis, while retrospective observational studies didn’t provide univocal answers on this topic, with the main part of studies disproving this relationship (36).

Actually, a causal association between incretin-based drugs and AP has not been definitively confirmed and a recent meta-analysis of 43 randomized controlled trials found no clear evidence of a strict relationship between AP in people with type 2 diabetes and GLP1RAs (37).

Despite the proven higher risk of AP in transplanted individuals and given the previous alerts on the relationship between GLP1RAs use and AP (although if never confirmed), no clear indications on the use of these drugs in liver-transplanted people with diabetes. Finally, no data are currently available on the potential increased risk of AP in liver-transplanted individuals with diabetes and treated with GLP1RAs.

On the one hand, such evidences could represent a relative contraindication to their use. On the other hand, abstention from it would deny the proven cardiovascular protection, offered by these drugs, in a high-risk population.

Data displayed in this case report are from our registry on liver transplanted patients, currently followed at our Clinic. The research protocol was approved by the 129 Ethics Committee of the IRCCS Ca’ Granda – Ospedale Maggiore Policlinico Foundation (Prot. n. 516) and has been registered on ClinicalTrials.gov (Identifier nr: NCT02038571).

Case report

251 liver transplanted individuals with diabetes were followed from 2016 to 2024 at the Endocrinology Unit of Fondazione IRCCS Ca’ Granda – Ospedale Maggiore Policlinico of Milan, Italy; among them, 66 patients started a GLP1RA-based therapy.

The choice of the therapeutic scheme was made according to current Standards of Care (27), and the most frequent reasons to start or switch to a GLP1RA-based therapy were the high cardio-vascular (CV) risk, a previous CV event or the need to lose weight in overweight/obese individuals. During this 8-years follow-up period, 2 patients from the GLP1RAs-treated group developed AP (3%).

A third patient, male, 66 years old, had to reduce the dose of dulaglutide from 1.5 to 0.75 mg/week because of a > 3-fold increase in pancreatic enzymes (amylase levels up to 166 UI/L lipase levels up to 249 UI/L).

Case 1: male, 66 years old

Patient nr.1 underwent liver transplantation for cirrhosis caused by secondary sclerosing cholangitis after echinococcosis in January 2016 and re-transplantation with Roux-en-Y hepaticojejunostomy technique for liver insufficiency after hepatic artery thrombosis (HAT) in April 2016. He developed post-transplant diabetes mellitus in the immediate post-transplant period and started insulin therapy by multiple daily injection scheme. In 2019, due to the presence of microalbuminuria, he was switched to basal insulin (degludec) 14 IU/day and canagliflozin 300 mg/day, as per guidelines, and in October 2022, dulaglutide 1.5 mg/week was added. He was on immunosuppressant therapy with tacrolimus and mycophenolate mofetil. Outpatient visits were performed every 6 months. At the visits, we monitored glucose profiles, HbA1c levels, renal function, lipid profile and amylase and lipase levels, which always remained within normal ranges. 10 months after starting GLP1RA-based therapy, the patient presented to the emergency department of our hospital with abdominal pain, fever and vomiting. A nasopharyngeal swab revealed a concomitant infection with Covid-19. During hospitalization, amylase and lipase levels increased from normal ranges to 219 UI/L and 298 UI/L, respectively. Computed tomography (CT) revealed an Intraductal Papillary Mucinous Neoplasm (IPMN) and magnetic resonance (MR) showed a typical pattern of AP.

Dulaglutide and Canagliflozin were discontinued and the patient was discharged on insulin therapy with an MDI regimen. At the last outpatient visit to our clinic amylase and lipase levels returned to normal ranges and canagliflozin was reintroduced.

Case 2: male, 61 years old

Patient nr.2 was affected by autosomal dominant polycystic kidney disease (ADPKD). He underwent left nephrectomy in 2002, kidney transplantation in 2007, right nephrectomy in 2009 and combined kidney-liver transplantation in January 2019. Liver transplantation was performed according to Starzl technique, with end-to-end anastomosis between the bile ducts.

He developed diabetes in 2019 and started insulin therapy by multiple daily injection scheme. He gradually reduced the total daily dose according to the steroid tapering. In 2022 he was switched to dulaglutide 1.5 mg weekly, due to the presence of macroalbuminuria and inadequate glomerular filtration rate for SGLT2 drugs (c-GFR, calculated according to the CKD-EPI formula: 19 mg/dl/m2) (38).

He was on immunosuppressant therapy with prednisone, tacrolimus and mycophenolate mofetil. Outpatient visits were performed every 6 months. As in Case 1, glucose profiles, HbA1c levels, lipid profile and amylase and lipase levels were continuously monitored and remained within normal ranges. After 22 months of GLP1RA-based therapy, the patient developed AP, with amylase and lipase levels rising from normal ranges to 433 UI/L and 1057 UI/L, respectively.

Dulaglutide was discontinued and the patient was discharged without any pharmacological treatment for diabetes. At his last outpatient visit to our clinic amylase and lipase levels returned to normal ranges and HBA1c was 45 mmol/mol so we didn’t start any additional therapy, despite the known proteinuria.

The timeline with the relevant data for each patient is shown in Figure 1.

Figure 1
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Figure 1 Timeline with the relevant clinical data for Case 1 and Case 2. M, male; OLT, orthotopic liver transplantation; DM, diabets mellitus; HbA1c, glycated hemoglobin; GFR, glomerular filtration rate; chol, cholesterol; HDL, high density lipoprotein; TX, transplantation.

Discussion

In our population of 66 liver transplant recipients with diabetes, we observed an incidence of AP of 3.0% in people taking a GLP1RA-based therapy. Conversely, we had no cases of AP among liver transplanted individuals who were managing their diabetes with SGLT2 inhibitors, metformin, insulin-based therapies or a combination of these molecules (42, 47, 51 and 38 individuals, respectively). Furthermore, 112 kidney-transplanted people with diabetes and 56 lung-transplanted people with diabetes regularly attend outpatients visits at our Clinic. We observed no cases of AP in kidney- and lung-transplanted individuals with diabetes who were on GLP1RA-based therapy (35 and 10 people, respectively).

We therefore investigated whether the coexistence of GLP1RAs-treated diabetes and liver transplantation could act synergistically as a risk factor for the development of AP.

As mentioned above, in both individuals with liver transplantation who developed AP, several conditions could be considered as potential risk factors for developing AP:

Surgical factors

Repeated surgical interventions on the abdominal cavity and potential injuries/ischemic damage to the pancreatic and peripancreatic tissues are known risk factors for the development of AP. In addition, the use of Roux-en-Y loop choledochojejunostomy has been associated with an increased risk of AP (18).

In our population, Case 1 underwent liver re-transplantation after first graft failure and underwent a Roux-en-Y loop choledochojejunostomy during the second transplantation.

Case 2 underwent a combined kidney-liver transplantation after a hesitant first kidney transplant with graft failure.

Infective causes

Infectious causes of AP, although rare, has been described in the general population; viral agents such as herpes virus and cytomegalovirus; bacterial agents as mycoplasma, legionella, leptospira, mycosis and parasitosis have been reported (39).

At the time of admission to our Hospital for AP, Case 1 presented with a positive nasopharyngeal swab for Covid-19: moreover, before transplantation, he suffered from secondary sclerosing cholangitis after echinococcosis and, during hospitalization for AP, he underwent lung biopsy with histopathological evidence of pulmonary echinococcosis.

Concomitant medications

Several immunosuppressant therapies have been reported to be potential causes of pancreatitis (16) but, actually, data about their role as a risk factor for drug-induced AP after liver transplantation are still conflicting (18, 40). In our population, however, the immunosuppressant regimens used for both clinical cases didn’t differ from other liver-transplanted patients.

Other risk factors

Alcoholic cirrhosis is one of the leading causes of liver transplantation in USA and Europe (41). Again, alcohol is the second most common risk factor for AP in the general population and the cause of 25% of post-liver transplant AP (42). In our case series, none of them had alcoholic cirrhosis and both reported total abstinence from alcohol.

Finally, hypertriglyceridemia is a further well demonstrated common cause of AP, and typically occurs in patients with concomitant uncontrolled diabetes, alterations in lipoprotein metabolism, alcohol abuse or concomitant medications (43). Despite concomitant immunosuppressant therapy with tacrolimus and the presence of diabetes and metabolic syndrome, both patients had normal lipid profiles and normal triglycerides levels (both patients were on statins and omega 3- based lipid-lowering therapy).

In Table 1 are schematically reported the potential additional risk factor for AP for each patient.

Table 1
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Table 1 Potential additional risk factor for AP for each patient.

In conclusion, in our liver-transplanted patients with diabetes treated with GLP1RAs, the incidence (3%) of AP didn’t differ from data reported in the current literature on the incidence of this complication in solid organ transplanted individuals or in people with diabetes receiving a GLP1RA based therapy. For this reason, and considering the powerful effect of GLP1RAs on cardiovascular protection beyond glycemic control, they should be proposed as first line therapy, as in type 2 diabetes. Particular caution should be taken in people with other risk factors for AP, such as a history of complex and repeated abdominal surgery.

Data availability statement

The raw data supporting the conclusions of this article will be made available by the authors, without undue reservation.

Ethics statement

The studies involving humans were approved by IRCCS Ca’ Granda – Ospedale Maggiore Policlinico Foundation. The studies were conducted in accordance with the local legislation and institutional requirements. The participants provided their written informed consent to participate in this study. Written informed consent was obtained from the individual(s) for the publication of any potentially identifiable images or data included in this article.

Author contributions

VG: Conceptualization, Data curation, Investigation, Supervision, Writing – original draft, Writing – review & editing. IC: Data curation, Investigation, Methodology, Writing – original draft, Writing – review & editing. AG: Data curation, Writing – review & editing. VR: Data curation, Writing – review & editing. EO: Data curation, Methodology, Validation, Writing – review & editing.

Funding

The author(s) declare that financial support was received for the research, authorship, and/or publication of this article. This study was (partially) supported by the Italian Ministry of Health (Ricerca Corrente 2023).

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.

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Keywords: GLP1RAs, pancreatitis, liver transplantation, incretin agents, acute pancreatitis

Citation: Grancini V, Cogliati I, Gaglio A, Resi V and Orsi E (2024) Case report: GLP1RA for the treatment of diabetes in liver transplanted people. Do they increase the risk of pancreatitis? Front. Endocrinol. 15:1392371. doi: 10.3389/fendo.2024.1392371

Received: 27 February 2024; Accepted: 22 April 2024;
Published: 08 May 2024.

Edited by:

Alessandro Cavarape, University of Udine, Italy

Reviewed by:

Jurij Dolensek, University of Maribor, Slovenia
Mark M. Smits, University of Copenhagen, Denmark

Copyright © 2024 Grancini, Cogliati, Gaglio, Resi and Orsi. 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: Valeria Grancini, dmFsZXJpYS5ncmFuY2luaUBwb2xpY2xpbmljby5taS5pdA==

Disclaimer: 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.