AI Article Synopsis
- The study investigates the role of TRPC3, a non-selective cation channel, in regulating insulin secretion and glucose control through glucose-stimulated calcium pathways.
- Experimental methods included using pharmacological tools and Trpc3 mice to evaluate TRPC3's effect on insulin secretion in both human and animal islets, as well as its involvement in glucose uptake and calcium imaging.
- The findings suggest that TRPC3 is crucial for insulin secretion but not for glucose uptake, and its modulation may offer new therapeutic strategies for treating diabetes.
Article Abstract
Insulin release is tightly controlled by glucose-stimulated calcium (GSCa) through hitherto equivocal pathways. This study investigates TRPC3, a non-selective cation channel, as a critical regulator of insulin secretion and glucose control. TRPC3's involvement in glucose-stimulated insulin secretion (GSIS) is studied in human and animal islets. TRPC3-dependent in vivo insulin secretion is investigated using pharmacological tools and Trpc3 mice. TRPC3's involvement in islet glucose uptake and GSCa is explored using fluorescent glucose analogue 2-[N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl) amino]-2-deoxy-D-glucose and calcium imaging. TRPC3 modulation by a small-molecule activator, GSK1702934A, is evaluated in type 2 diabetic mice. TRPC3 is functionally expressed in human and mouse islet beta cells. TRPC3-controlled insulin secretion is K -independent and primarily mediated by diacylglycerol channel regulation of the cytosolic calcium oscillations following glucose stimulation. Conversely, glucose uptake in islets is independent of TRPC3. TRPC3 pharmacologic inhibition and knockout in mice lead to defective insulin secretion and glucose intolerance. Subsequently, TRPC3 activation through targeted small-molecule enhances insulin secretion and alleviates diabetes hallmarks in animals. This study imputes a function for TRPC3 at the onset of GSIS. These insights strengthen one's knowledge of insulin secretion physiology and set forth the TRPC3 channel as an appealing candidate for drug development in the treatment of diabetes.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9951314 | PMC |
| http://dx.doi.org/10.1002/advs.202204846 | DOI Listing |
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