GIP mediates the incretin effect and glucose tolerance by dual actions on α cells and β cells.
GIP mediates the incretin effect and glucose tolerance by dual actions on α cells and β cells.
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GIP通过对α细胞和β细胞的双重作用介导肠促胰岛素效应和糖耐量。
DOI:
10.1126/sciadv.abf1948
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发表时间:
2021-03
期刊:
影响因子:
13.6
通讯作者:
Campbell JE
中科院分区:
文献类型:
--
作者:
El K;Gray SM;Capozzi ME;Knuth ER;Jin E;Svendsen B;Clifford A;Brown JL;Encisco SE;Chazotte BM;Sloop KW;Nunez DJ;Merrins MJ;D'Alessio DA;Campbell JE
GIPR activity in α cells is required for the complete metabolic response to a meal. Glucose-dependent insulinotropic polypeptide (GIP) communicates nutrient intake from the gut to islets, enabling optimal levels of insulin secretion via the GIP receptor (GIPR) on β cells. The GIPR is also expressed in α cells, and GIP stimulates glucagon secretion; however, the role of this action in the postprandial state is unknown. Here, we demonstrate that GIP potentiates amino acid–stimulated glucagon secretion, documenting a similar nutrient-dependent action to that described in β cells. Moreover, we demonstrate that GIP activity in α cells contributes to insulin secretion by invoking paracrine α to β cell communication. Last, specific loss of GIPR activity in α cells prevents glucagon secretion in response to a meal stimulus, limiting insulin secretion and driving glucose intolerance. Together, these data uncover an important axis by which GIPR activity in α cells is necessary to coordinate the optimal level of both glucagon and insulin secretion to maintain postprandial homeostasis.
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影响因子:
3
作者:
El K;Campbell JE
通讯作者:
Campbell JE
影响因子:
120.1
作者:
Drucker, Daniel J.
通讯作者:
Drucker, Daniel J.
影响因子:
15.9
作者:
NAUCK, MA;HEIMESAAT, MM;CREUTZFELDT, W
通讯作者:
CREUTZFELDT, W
影响因子:
8
作者:
Capozzi, Megan E.;Wait, Jacob B.;Campbell, Jonathan E.
通讯作者:
Campbell, Jonathan E.
影响因子:
--
作者:
OPARA, EC;GO, VLW
通讯作者:
GO, VLW