Glucose sensing in L cells: a primary cell study.
Glucose sensing in L cells: a primary cell study.
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DOI:
10.1016/j.cmet.2008.11.002
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发表时间:
2008-12
期刊:
影响因子:
29
通讯作者:
Gribble FM
中科院分区:
文献类型:
--
作者:
Reimann F;Habib AM;Tolhurst G;Parker HE;Rogers GJ;Gribble FM
Glucagon-like peptide-1 (GLP-1) is an enteric hormone that stimulates insulin secretion and improves glycaemia in type 2 diabetes. Although GLP-1-based treatments are clinically available, alternative strategies to increase endogenous GLP-1 release from L cells are hampered by our limited physiological understanding of this cell type. By generating transgenic mice with L cell-specific expression of a fluorescent protein, we studied the characteristics of primary L cells by electrophysiology, fluorescence calcium imaging, and expression analysis and show that single L cells are electrically excitable and glucose responsive. Sensitivity to tolbutamide and low-millimolar concentrations of glucose and α-methylglucopyranoside, assessed in single L cells and by hormone secretion from primary cultures, suggested that GLP-1 release is regulated by the activity of sodium glucose cotransporter 1 and ATP-sensitive K+ channels, consistent with their high expression levels in purified L cells by quantitative RT-PCR. These and other pathways identified using this approach will provide exciting opportunities for future physiological and therapeutic exploration.
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影响因子:
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作者:
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通讯作者:
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DOI:
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