Gut:丁酸通过肠脑神经网络降低食欲并激活棕色脂肪组织

2017-11-07 zhangfan MedSci原创

研究认为,丁酸作用于肠脑神经网络通过降低食欲、激活棕色脂肪、提高脂肪氧化等方式加速能力代谢

丁酸对小鼠和人类代谢有益的机制尚不清楚。近日研究人员考察了丁酸对食欲和能量消耗的影响。

研究通过小鼠灌胃或静脉丁酸注射,考察其对食欲的影响;在高脂饮食喂养小鼠中,添加丁酸或安慰剂考察丁酸对代谢的影响;通过切断迷走神经的小鼠模型考察丁酸对肠道的机械运动和脑神经电路的影响。

研究发现,口服而非静脉注射丁酸可降低小鼠食欲,抑制小鼠下丘脑食欲神经元的表达和神经肽Y活性,降低脑干中孤束核和迷走背核复合体神经元活性。通过减少食物摄入,长期慢性丁酸添加可防止饮食引起的肥胖、高胰岛素血症、高甘油三酯血症和肝脂肪变性。丁酸可促进脂肪氧化并激活棕色脂肪组织,增加血浆甘油三酯脂肪酸的利用率,该效果不是减少食物摄入量导致的,可能是通过刺激交感神经导致的。膈下迷走神经切断后,丁酸降低食欲和激活棕色脂肪组织的效果消失。

研究认为,丁酸作用于肠脑神经网络通过降低食欲、激活棕色脂肪、提高脂肪氧化等方式加速能力代谢。

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    2018-04-09 siiner
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    2017-11-09 虈亣靌

    谢谢分享谢谢分享

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