VAMP8 Is an Endosomal v-SNARE That Supports GLP-1 Receptor Recycling in Pancreatic β-Cells.

Liu, Liangwen; Marshall, Misty; Chadeuf, Emmanuel; Saras, Jan; Barg, Sebastian · Diabetes · 2025

basic_science · Level V

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Abstract

Vesicle-associated membrane protein 8 (VAMP8) localizes to endosomal vesicles and mediates their exocytosis in pancreatic β-cells. VAMP8-dependent vesicle fusion delivers glucagon-like peptide 1 receptor and GLUT2 to the plasma membrane. VAMP8 overexpression inhibits insulin granule exocytosis. "Newcomer" exocytosis likely involves endosomal compartments, not insulin granules.

Medical subject headings