RT Journal Article
T1 GPR41 and GPR43 modulate rodent pancreatic alpha-cell function and growth.
A1 Sánchez-Roncero, Alicia
A1 Fernández Marcelo, Tamara
A1 Pérez-Serna, AA
A1 Martínez-Oca, Paula
A1 Alberquilla-Fernández, Omaira
A1 Sánchez-Domínguez, Rebeca
A1 Segovia, Jose Carlos
A1 Escrivá Pons, Fernando
A1 González Gálvez, Beatriz
A1 Álvarez Escolá, Carmen
A1 Marroqui, Laura
A1 Fernández Millán, Elisa
AB Objective: While SCFA receptors GPR41 and GPR43 regulate β-cell insulin secretion, their role in α-cells remains unknown despite hyperglucagonemia in type 2 diabetes (T2D). Thus, the current study aims to investigate the ability of synthetic GPR41 and GPR43 agonists to modulate α-cell physiology and responsiveness to nutrient challenge.Methods: Using αTC1.9 cells and primary rat islets we investigated the role of SCFA receptors in glucagon expression and secretion under physiological and insulin resistant conditions associated with high-fat feeding (HFD) and lactation (L). The specific agonists AR420626 (AR) and (S)-2-(4-chlorophenyl)-3,3-dimethyl-N-(5-phenylthiazol-2-yl) butanamide (PA) were employed to study the mechanisms involved.Results: Histological and flow cytometry analysis of islets demonstrated that GPR41 and GPR43 localized in α-cells. Treatment of αTC1.9 cells with the GPR41-agonist AR or GPR43-agonist PA increased Gcg expression and glucagon secretion at low glucose, while AR also potentiated glucagon release at high glucose. This effect was recapitulated in isolated islets demonstrating pertussis toxin sensitivity for both agonist effects. HFD-fed animals showed glucose intolerance, early fasting hyperglucagonemia and islet resistance to glucose inhibition of glucagon secretion together with enhanced expression of islet Gpr41/43. Stimulation of HFD islets with the synthetic agonists further increased Gcg expression. Pancreatic Gpr41/43 levels were also transiently induced during lactation although only GPR41 activation of lactating rat islets up-regulated Gcg expression via Gαi andα-cell replication.Conclusions: These findings position GPR41 as a promising therapeutic target for modulating hyperglucagonemia and improving glycemic control in T2D, supporting its translational relevance in diabetes intervention strategies.
PB Elsevier
YR 2025
FD 2025-08
LK https://hdl.handle.net/20.500.14352/125744
UL https://hdl.handle.net/20.500.14352/125744
LA eng
NO Sánchez-Roncero A, Fernández-Marcelo T, Pérez-Serna AA, Martínez-Oca P, Alberquilla-Fernández O, Sánchez-Domínguez R, et al. GPR41 and GPR43 modulate rodent pancreatic α-cell function and growth. Life Sciences [Internet]. octubre de 2025 [citado 5 de noviembre de 2025];379:123913. Disponible en: https://linkinghub.elsevier.com/retrieve/pii/S002432052500548X
NO Ministerio de Ciencia, Innovación y Universidades
NO European Commission-ERC
DS Docta Complutense
RD 31 mar 2026