Cell Research:断食疗法有助减肥的生物学证明

2017-10-18 小通 生物通

不用控制卡路里摄入,16周间歇禁食有助于抵抗肥胖和代谢紊乱。根据学术期刊《Cell Research》(影响因子15.6)最新一篇文章,间歇进食的好处最快6周显现。


不用控制卡路里摄入,16周间歇禁食有助于抵抗肥胖和代谢紊乱。根据学术期刊《Cell Research》(影响因子15.6)最新一篇文章,间歇进食的好处最快6周显现。

加拿大疾病儿童医院Hoon-Ki Sung课题组找到了“瑜伽禁食”、“道家辟谷”益于保持体形的生物基础,文章作者Kyoung-Han Kim和Yun Hye Kim的研究证明,间歇性禁食有助于小鼠启动新陈代谢,提高体温燃烧脂肪。

不健康的饮食习惯、久坐等不良生活方式与许多代谢疾病有关,如糖尿病、心脏病和肥胖症。根据最新研究,间歇性禁食,例如断食疗法,有助于这些情况的治疗。

研究小组希望在分子水平上细致了解禁食触发了哪些反应。

长达16周内,让实验小鼠经历“进食两天,断食一天”的循环治疗,总卡路里摄入不经调整。4个月后,对比摄入相同食物数量的对照组小鼠,禁食组小鼠体重减轻。

体重下降并不是唯一好处。在高脂食谱中,这种短周期禁食能减少小鼠体内“有害”的白色脂肪,增加“有益”的棕色脂肪。小鼠血糖和胰岛素系统也更加稳定。
进一步实验表明,这种益处在禁食的第六周即可显现。

通过基础生物学分析,研究人员发现间歇性禁食使脂肪产生免疫反应,免疫系统和炎症反应的某些基因通路发生了变化,一种在抗炎症反应中起重要作用的白细胞被激发了。这种抗炎巨噬细胞刺激脂肪细胞燃烧储存的脂质或脂肪来促进产热。

在禁食期间,由于血管生长因子(vascular growth factor,VEGF)水平上调,帮助了抗炎巨噬细胞激活以及血管形成。

“在不减少卡路里摄入的前提下,间歇性禁食可以预防和治疗肥胖和代谢性疾病,”Kyoung-Han Kim说。

“更引人注目的是,单次24小时为周期的断食就能刺激血管细胞生长变化,以及之后的免疫变化。当小鼠再次禁食时,情况则立即发生反转。”Yun Hye Kim补充道。

原始出处:

Kyoung-Han Kim1,12,*, Yun Hye Kim2,*, Joe Eun Son,et al.Intermittent fasting promotes adipose thermogenesis and metabolic homeostasis via VEGF-mediated alternative activation of macrophage.Cell research.Volume 27, No 7, Jul 2017


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    2018-06-30 xugumin
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    2017-11-20 维他命
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    2017-10-20 yangshch
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