Abstract
Introduction
Bariatric surgery including the Roux-en-Y gastric bypass (RYGB) and the laparoscopic sleeve gastrectomy (LSG) is a well-established therapeutic option for patients with morbid or severe obesity. Metabolic modifications observed after bariatric surgery are thought to be, at least partly, linked to hormonal changes. While variation of several proglucagon-derived peptides during bariatric surgery is well documented, little is known about glicentin. The aim of this study was to investigate circulating glicentin variations after bariatric surgery.
Material and Methods
Thirty patients eligible for bariatric surgery (18 RYGB and 12 LSG procedures) were prospectively included in the University Hospital of Nice. Clinical data and fasting biological parameters were recorded preoperatively, at 3, 6, and 12 months after bariatric surgery.
Results
The median age of patients was 51 years (35–56) with 33.3% men. Fasting glicentin concentration increased progressively after bariatric surgery from 6 months and was more marked at 12 months (14 ± 3.6 pmol/L at baseline vs 19.7 ± 2.7 pmol/L at 12 months for RYGB and 12.5 ± 1.4 vs 16.4 ± 1.8 pmol/L for LSG, respectively). Compared to preoperative values, the fold increase of glicentin at 12 months was 2 ± 0.2 in the RYGB group and 1.6 ± 0.3 in the LSG group. Glicentin variation after surgery did not correlate with anthropometric, glycemic, or lipid parameter modifications.
Conclusion
Fasting glicentin level increases after bariatric surgery suggesting the potential interest of this peptide as a player and/or a marker of physiological changes after bariatric surgery.



Abbreviations
- ALT:
-
Aspartate aminotransferase
- AST:
-
Alanine aminotransferase
- BMI:
-
Body mass index
- GGT:
-
Gamma glutamyltransferase
- GLP-1:
-
Glucagon-like peptide-1
- GLP-2:
-
Glucagon-like peptide-2
- HDL:
-
High-density lipoprotein
- HOMA-IR:
-
Homeostasis model assessment for insulin resistance
- LDL:
-
Low-density lipoprotein
- LSG:
-
Laparoscopic sleeve gastrectomy
- RYGB:
-
Roux-en-Y gastric bypass
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Acknowledgements
Teams of the Departments of Endocrinology, Bariatric, and Visceral Surgery and of the Clinical Chemistry Laboratory (University Hospital of Nice) are acknowledged for their help in collecting samples and data. M. Kacimi (Mercodia®) is acknowledged for providing glicentin ELISA kits.
Author Contributions
All authors contributed to the design, conducted, collected, analyzed, and interpreted the data. All authors contributed to the intellectual content of this article and approved the final version.
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The authors declare that they have no conflict of interest.
Statement of Informed Consent
Informed consent was obtained from all individual participants included in the study.
Statement of Human and Animal Rights
All procedures performed in studies involving human participants were done in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
Funding
This study was supported by the Université Côte d’Azur and the University Hospital of Nice.
Electronic Supplementary Material
Figure S1:
Anthropometric measures before and at 3, 6 and 12 months after bariatric surgery, expressed as means ± SEM. (a) Body mass index (kg/m2), (b) Weight loss (%), (c) Fat mass (%), (d) Abdominal circumference (cm). a: p < 0.05 vs pre-operative value. b: p < 0.05 vs 3 months value. c: p < 0.05 vs 6 months value. Pre-op: pre-operative ; 3 M: 3 months after surgery ; 6 M: 6 months after surgery ; 12 M: 12 months after surgery
Figure S2: Glycemic parameters before and at 3, 6 and 12 months after bariatric surgery, expressed as means ± SEM. (a) Glycemia (mmol/L), (b) HbA1c (%), (c) Insulinemia (mU/l), (d) C-peptide (pmol/L), (E) HOMA-IR. a: p < 0.05 vs pre-operative value. Pre-op: pre-operative ; 3 M: 3 months after surgery ; 6 M: 6 months after surgery ; 12 M: 12 months after surgery
Figure S3: Lipid parameters before and at 3, 6 and 12 months after bariatric surgery, expressed as means ± SEM. (a) Triglyceride (g/L), (b) Total cholesterol (g/L), (c) LDL-cholesterol (g/L), (d) HDL-cholesterol (g/L). a: p < 0.05 vs pre-operative value. b: p < 0.05 vs 3 months value. Pre-op: pre-operative ; 3 M: 3 months after surgery ; 6 M: 6 months after surgery ; 12 M: 12 months after surgery (DOCX 238 kb)
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Raffort, J., Panaïa-Ferrari, P., Lareyre, F. et al. Fasting Circulating Glicentin Increases After Bariatric Surgery. OBES SURG 27, 1581–1588 (2017). https://doi.org/10.1007/s11695-016-2493-5
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DOI: https://doi.org/10.1007/s11695-016-2493-5