Planar cell polarity controls pancreatic beta cell differentiation and glucose homeostasis.

Planar cell polarity controls pancreatic beta cell differentiation and glucose homeostasis.
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DOI:
10.1016/j.celrep.2012.10.016
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发表时间:
2012-12-27
期刊:
影响因子:
8.8
通讯作者:
Grapin-Botton A
Grapin-Botton A
中科院分区:
生物学1区
文献类型:
--
作者:
Cortijo C;Gouzi M;Tissir F;Grapin-Botton A

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平面细胞极性(PCP)是指细胞在上皮平面内的集体取向。我们发现,形成胚胎胰腺导管的祖细胞表达PCP蛋白,并表现出活跃的PCP途径。在胚胎11.5天,平面极性蛋白的获得与胰腺祖细胞的根尖基极化同步。PCP的两个核心成分Celsr2和Celsr3的功能丧失表明,它们控制着内分泌细胞从极化的祖细胞分化而来,对产生胰岛素的β细胞具有普遍的影响。这会导致葡萄糖清除量降低。Celsr2和3的缺失导致前体细胞Jun磷酸化减少,这反过来又减少了内分泌前体细胞与β细胞的分化。这些结果强调了PCP通路在脊椎动物细胞分化中的重要性。此外,他们揭示了胰腺上皮细胞的三维组织和集体交流是产生适当数量的内分泌细胞所必需的。
Planar cell polarity (PCP) refers to the collective orientation of cells within the epithelial plane. We show that progenitor cells forming the ducts of the embryonic pancreas express PCP proteins and exhibit an active PCP pathway. Planar polarity proteins are acquired at embryonic day 11.5 synchronously to apicobasal polarization of pancreas progenitors. Loss of function of the two PCP core components Celsr2 and Celsr3 shows that they control the differentiation of endocrine cells from polarized progenitors, with a prevalent effect on insulin-producing beta cells. This results in a decreased glucose clearance. Loss of Celsr2 and 3 leads to a reduction of Jun phosphorylation in progenitors, which, in turn, reduces beta cell differentiation from endocrine progenitors. These results highlight the importance of the PCP pathway in cell differentiation in vertebrates. In addition, they reveal that tridimensional organization and collective communication of cells are needed in the pancreatic epithelium in order to generate appropriate numbers of endocrine cells.
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