Gut endocrine cell development.

Gut endocrine cell development.
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DOI:
10.1016/j.mce.2009.12.009
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发表时间:
2010-07-08
影响因子:
4.1
通讯作者:
Kaestner KH
Kaestner KH
中科院分区:
医学2区
文献类型:
--
作者:
May CL;Kaestner KH

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内分泌细胞散布在从胃到结肠的整个胃肠粘膜中,构成体内最大的内分泌系统之一。嗜铬粒蛋白A标记的肠内分泌细胞约占胃肠道所有上皮细胞的1%,其周围是胃中的粘液细胞、头细胞和壁细胞,以及肠内的肠细胞、杯状细胞和潘氏细胞(图1)。肠内分泌系统由至少15种不同的细胞类型组成,可根据其主要激素产物及其分泌颗粒的超微结构进行分类(Rindi等人,2004年)。特定的肠内分泌细胞分泌一种或多种激素或类似激素的物质,这些物质直接释放到固有层,并扩散到毛细血管。这些激素包括胃泌素、组胺、5-羟色胺、胆囊收缩素(CCK)、生长抑素和胰升糖素样肽(GLP1和GLP2)(Rindi等人,2004年)。虽然肠内分泌细胞非常稀少,但它们是消化、肠道运动、食欲和新陈代谢的重要调节器。
Endocrine cells are scattered throughout the gastrointestinal mucosa from the stomach to the colon and constitute one of the largest endocrine systems in the body. Enteroendocrine cells labeled by chromogranin A comprise about 1% of all epithelial cells in the gastrointestinal tract and are surrounded by mucus, chief, and parietal cells in the stomach, and enterocyte, goblet and Paneth cells in the intestine (Fig. 1). The enteroendocrine system consists of at least 15 different cell types that can be classified based on their main hormonal products and on the ultrastructure of their secretory granules (Rindi et al., 2004). A given enteroendocrine cell secretes one or more hormone or hormone-like substance, which is released directly into the lamina propria and diffuses into the capillaries. These hormones include gastrin, histamine, serotonin, cholecystokinin (CCK), somatostatin and glucagon-like peptides (GLP1 and GLP2)(Rindi et al., 2004). Although enteroendocrine cells are very scarce, they are essential regulators of digestion, gut motility, appetite, and metabolism.
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