Fig. 8

The “Receptor Depletion” hypothesis: The evolution of the transient receptor potential vanillin-1 (TRPV1) receptors in Type 2 Diabetes (T2DM). The transient receptor potential vanillin-1 (TRPV1) positive neurons containing CGRP can control the pancreatic β cells. They form a feedback loop formed which is affected by glial cells and inflammatory cytokines. After continuous chronic stimulation, β cell function was seriously impaired and insulin secretion decreased. At this time, TRPV1 receptor will be inactivated, affecting CGRP secretion and aggravating T2DM. INS, insulin; INsR, insulin receptor; CGRP, calcitonin gene-related peptide; GDNF, glial cell-derived neurotrophic factor; IL-1β, interleukin-1β; IL-10, interleukin-10