AGING CELL:热量限制是如何发挥其抗炎作用的?

2019-04-03 海北 MedSci原创

已有的研究显示,卡路里限制(CR)延长了许多机体的寿命,并且其与中度过度的肾上腺皮质激素,以及炎症的减轻有关。

已有的研究显示,卡路里限制(CR)延长了许多机体的寿命,并且其与中度过度的肾上腺皮质激素,以及炎症的减轻有关。考虑到糖皮质激素的抗炎作用,最近,研究人员测试了CR的超肾上腺皮质激素有助于其减弱炎症反应的假设。

研究人员使用促肾上腺皮质激素释放激素敲除(CRHKO)小鼠,该小鼠糖皮质激素不足。该实验共有四个对照组:CRHKO小鼠和野生型(WT)同窝小鼠,分别使其自由采食(AL)或进行CR(60%AL食物摄入)。研究人员设置了三个实验组:(a)给予皮质酮的AL喂养的CRHKO小鼠( CORT),在它们的饮用水中滴定皮质酮,以匹配AL喂养的WT小鼠的综合24小时血浆CORT水平,(b)CR喂养的CRHKO小鼠,给予CORT,以匹配AL喂养的WT小鼠的24小时CORT水平,和(c)CR喂养的CHRKO小鼠,给予CORT,以匹配CR喂养的WT小鼠的24小时CORT水平。

此外,研究人员通过角叉菜胶注射诱导的足垫水肿体积测量炎症。

如先前所观察到的,CR减弱WT小鼠的足垫水肿。在CORT缺陷的CR喂养的CRHKO小鼠中,这种减弱被显着阻断。将CR喂养的CRHKO小鼠中的CORT替换为在CR喂养的WT小鼠中观察到的升高水平,但未达到在AL喂养的WT小鼠中观察到的水平,恢复CR的抗炎作用。

这些结果表明,CR的超肾上腺皮质激素有助于其抗炎作用,这可能反过来有助于其延长寿命的作用。


原始出处:

Brian D. Allen et al. Hyperadrenocorticism of calorie restriction contributes to its anti‐inflammatory action in mice. AGING CELL, 2019; doi: https://doi.org/10.1111/acel.12944


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    2019-12-04 维他命
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    2019-04-03 王秀

    学习了,涨知识了!

    0

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    2019-04-03 蝴蝶A

    肾上腺素,延长生命

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