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Effects of amylin-related peptides on food intake, meal patterns, and gastric emptying in rats.

机译:胰岛淀粉样多肽相关肽对大鼠食物摄入,进食方式和胃排空的影响。

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We previously demonstrated that amylin inhibits food intake and gastric emptying in rats with half-maximal effective doses (ED(50)s) of 8 and 3 pmol x kg(-1) x min(-1) and maximal inhibitions of 78 and 60%, respectively. In this study of identical design, rats received intravenous infusions of salmon calcitonin (sCT), rat calcitonin (rCT), rat calcitonin gene-related peptide (rCGRP), and rat adrenomedullin (rADM) for 3 h at dark onset, and food intake was measured for 17 h or for 15 min and gastric emptying of saline was measured during the final 5 min. sCT, rCGRP, and rADM inhibited food intake with estimated ED(50)s of 0.5, 26, and 35 pmol x kg(-1) x min(-1) and maximal inhibitions of 88, 90, and 49%, respectively. rCT was not effective at doses up to 100 pmol x kg(-1) x min(-1). sCT, rCGRP, rADM, and rCT inhibited gastric emptying with ED(50)s of 1, 130, 160, and 730 pmol x kg(-1) x min(-1) and maximal inhibitions of 60, 66, 60, and 33%, respectively. These results suggest that amylin and sCT may act by a common mechanism to decrease food intake, which includes inhibition of gastric emptying.
机译:我们以前证明胰岛淀粉样多肽抑制大鼠最大半有效剂量(ED(50)s为8和3 pmol x kg(-1)x min(-1)的食物摄取和胃排空,最大抑制量为78和60 %, 分别。在相同设计的这项研究中,大鼠在黑暗发作时接受了鲑鱼降钙素(sCT),大鼠降钙素(rCT),大鼠降钙素基因相关肽(rCGRP)和大鼠肾上腺髓质素(rADM)静脉输注3小时,并进食了食物测量17小时或15分钟,并在最后5分钟内测量胃的盐水排空。 sCT,rCGRP和rADM抑制食物摄入,估计的ED(50)s为0.5、26和35 pmol x kg(-1)x min(-1),最大抑制分别为88%,90%和49%。 rCT在高达100 pmol x kg(-1)x min(-1)的剂量下无效。 sCT,rCGRP,rADM和rCT抑制胃排空,ED(50)为1,130、160和730 pmol x kg(-1)x min(-1),最大抑制为60、66、60和分别为33%。这些结果表明胰岛淀粉样多肽和sCT可能通过减少食物摄入的共同机制起作用,其中包括抑制胃排空。

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