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Acarbose improved survival for Apc+/Min mice.
Aging Cell ( IF 8.0 ) Pub Date : 2020-01-06 , DOI: 10.1111/acel.13088
Sherry G Dodds 1 , Manish Parihar 1 , Martin Javors 2 , Jia Nie 3 , Nicolas Musi 3, 4 , Zelton Dave Sharp 1, 3, 5 , Paul Hasty 1, 3, 5
Affiliation  

Acarbose blocks the digestion of complex carbohydrates, and the NIA Intervention Testing Program (ITP) found that it improved survival when fed to mice. Yet, we do not know if lifespan extension was caused by its effect on metabolism with regard to the soma or cancer suppression. Cancer caused death for ~80% of ITP mice. The ITP found rapamycin, an inhibitor to the pro‐growth mTORC1 (mechanistic target of rapamycin complex 1) pathway, improved survival and it suppressed tumors in Apc+/Min mice providing a plausible rationale to ask if acarbose had a similar effect. Apc+/Min is a mouse model prone to intestinal polyposis and a mimic of familial adenomatous polyposis in people. Polyp‐associated anemia contributed to their death. To address this knowledge gap, we fed two doses of acarbose to Apc+/Min mice. Acarbose improved median survival at both doses. A cross‐sectional analysis was performed next. At both doses, ACA fed mice exhibited reduced intestinal crypt depth, weight loss despite increased food consumption and reduced postprandial blood glucose and plasma insulin, indicative of improved insulin sensitivity. Dose‐independent and dose‐dependent compensatory liver responses were observed for AMPK and mTORC1 activities, respectively. Only mice fed the high dose diet exhibited reductions in tumor number with higher hematocrits. Because low‐dose acarbose improved lifespan but failed to reduced tumors, its effects seem to be independent of cancer. These data implicate the importance of improved carbohydrate metabolism on survival.

中文翻译:


阿卡波糖提高了 Apc+/Min 小鼠的存活率。



阿卡波糖会阻碍复杂碳水化合物的消化,NIA 干预测试计划 (ITP) 发现,将阿卡波糖喂给小鼠可以提高小鼠的存活率。然而,我们不知道寿命的延长是否是由于它对新陈代谢(与体细胞或癌症抑制有关)的影响所致。癌症导致约 80% 的 ITP 小鼠死亡。 ITP 发现雷帕霉素(一种促进生长的 mTORC1(雷帕霉素复合物 1 的机制靶标)途径的抑制剂)可提高Apc +/Min小鼠的存活率并抑制肿瘤,这为询问阿卡波糖是否具有类似作用提供了合理的理由。 Apc +/Min是一种容易患肠息肉病的小鼠模型,是人类家族性腺瘤性息肉病的模拟模型。息肉相关贫血导致了他们的死亡。为了解决这一知识差距,我们给Apc +/Min小鼠喂食两剂阿卡波糖。两种剂量的阿卡波糖均改善了中位生存期。接下来进行横断面分析。在这两种剂量下,喂食 ACA 的小鼠均表现出肠隐窝深度减少、尽管食物消耗增加但体重减轻、餐后血糖和血浆胰岛素降低,表明胰岛素敏感性改善。分别观察 AMPK 和 mTORC1 活性的剂量无关和剂量依赖性代偿性肝脏反应。只有喂食高剂量饮食的小鼠表现出肿瘤数量减少且血细胞比容较高。由于低剂量阿卡波糖可以延长寿命但无法减少肿瘤,因此其作用似乎与癌症无关。这些数据表明改善碳水化合物代谢对生存的重要性。
更新日期:2020-01-06
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