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.
复制标题

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
复制
发表时间:
2021-03
期刊:
影响因子:
13.6
通讯作者:
Campbell JE
Campbell JE
中科院分区:
综合性期刊1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

文献摘要

参考文献

被引文献

相似文献

α细胞中的GIPR活性是对膳食的完全代谢反应所必需的。葡萄糖依赖型胰岛素多肽(GIP)将营养摄入从肠道传递到胰岛,通过β细胞上的GIP受体(GIPR)使胰岛素分泌达到最佳水平。GIPR也在α细胞中表达,刺激胰高血糖素分泌;然而,这种作用在餐后状态中的作用尚不清楚。在这里,我们证明了GIP增强氨基酸刺激的胰高血糖素分泌,记录了与β细胞相似的营养依赖作用。此外,我们证明了α细胞中的GIP活性通过激活旁分泌α到β细胞的通讯来促进胰岛素分泌。最后,α细胞中GIPR活性的特异性丧失阻止了胰高血糖素在食物刺激下的分泌,限制了胰岛素分泌并导致葡萄糖耐受不良。总之,这些数据揭示了一个重要的轴,通过这个轴,α细胞中的GIPR活性是协调胰高血糖素和胰岛素分泌的最佳水平以维持餐后体内平衡所必需的。
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.
DOI: 10.1016/j.peptides.2019.170213
发表时间: 2020-03
期刊: Peptides
影响因子: 3
作者:
El K;Campbell JE
通讯作者: Campbell JE
DOI: 10.1038/s41573-019-0053-0
发表时间: 2020-04-01
影响因子: 120.1
作者:
Drucker, Daniel J.
通讯作者: Drucker, Daniel J.
DOI: 10.1172/jci116186
发表时间: 1993-01-01
影响因子: 15.9
作者:
NAUCK, MA;HEIMESAAT, MM;CREUTZFELDT, W
通讯作者: CREUTZFELDT, W
DOI: 10.1172/jci.insight.129954
发表时间: 2019-08-22
期刊: JCI INSIGHT
影响因子: 8
作者:
Capozzi, Megan E.;Wait, Jacob B.;Campbell, Jonathan E.
通讯作者: Campbell, Jonathan E.
DOI: 10.1016/0167-0115(91)90035-f
发表时间: 1991-02-01
影响因子: --
作者:
OPARA, EC;GO, VLW
通讯作者: GO, VLW