首页> 外文期刊>Nature >Conserved mechanisms of glucose sensing and regulation by Drosophila corpora cardiaca cells
【24h】

Conserved mechanisms of glucose sensing and regulation by Drosophila corpora cardiaca cells

机译:果蝇心体细胞对葡萄糖的敏感调控机制

获取原文
获取原文并翻译 | 示例
           

摘要

Antagonistic activities of glucagon and insulin control metabolism in mammals, and disruption of this balance underlies diabetes pathogenesis. Insulin-producing cells (IPCs) in the brain of insects such as Drosophila also regulate serum glucose(1,2), but it remains unclear whether insulin is the sole hormonal regulator of glucose homeostasis and whether mechanisms of glucose-sensing and response in IPCs resemble those in pancreatic islets. Here we show, by targeted cell ablation, that Drosophila corpora cardiaca (CC) cells(3-5) of the ring gland are also essential for larval glucose homeostasis. Unlike IPCs, CC cells express Drosophila cognates of sulphonylurea receptor (Sur) and potassium channel (Ir), proteins that comprise ATP-sensitive potassium channels regulating hormone secretion by islets and other mammalian glucose-sensing cells(6-8). They also produce adipokinetic hormone, a polypeptide with glucagon-like functions. Glucose regulation by CC cells is impaired by exposure to sulphonylureas, drugs that target the Sur subunit. Furthermore, ubiquitous expression of an akh transgene reverses the effect of CC ablation on serum glucose. Thus, Drosophila CC cells are crucial regulators of glucose homeostasis and they use glucose-sensing and response mechanisms similar to islet cells.
机译:胰高血糖素和胰岛素的拮抗活性控制着哺乳动物的新陈代谢,这种平衡的破坏是糖尿病发病的基础。果蝇等昆虫大脑中的胰岛素产生细胞(IPC)也调节血清葡萄糖(1,2),但尚不清楚胰岛素是否是葡萄糖稳态的唯一激素调节剂,以及IPC中葡萄糖的感应和反应机制类似于胰岛中的胰岛。在这里,我们通过有针对性的细胞消融显示,环形果蝇的果蝇心脏(CC)细胞(3-5)对于幼虫葡萄糖稳态也是必不可少的。与IPC不同,CC细胞表达果蝇的磺酰脲受体(Sur)和钾通道(Ir)的蛋白质,这些蛋白质包含ATP敏感的钾通道,调节胰岛和其他哺乳动物葡萄糖敏感细胞的激素分泌(6-8)。它们还产生脂肪代谢激素,一种具有胰高血糖素样功能的多肽。暴露于磺脲类药物(靶向Sur亚基的药物)会损害CC细胞对葡萄糖的调节。此外,akh转基因的普遍表达逆转了CC消融对血清葡萄糖的作用。因此,果蝇CC细胞是葡萄糖稳态的关键调节剂,它们使用的葡萄糖感测和反应机制与胰岛细胞相似。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号