Circulation:该睡不睡,心脏遭罪!我国学者发现打破昼夜节律致心脏病的机制

2022-01-19 医诺维 医诺维

昼夜节律,即生物钟,已得到科学家的广泛研究。昼夜节律赋予了人类行为和生理学的时间模式,使身体内在与外在环境的预期变化保持一致,被扰乱的昼夜节律会对健康产生影响。逆天而行的作息会增加代谢紊乱的风险。

昼夜节律,即生物钟,已得到科学家的广泛研究。昼夜节律赋予了人类行为和生理学的时间模式,使身体内在与外在环境的预期变化保持一致,被扰乱的昼夜节律会对健康产生影响。逆天而行的作息会增加代谢紊乱的风险,从代谢和心血管疾病的风险增加到精神疾病和癌症。

2022年1月17日,中国医学科学院心血管疾病研究中心和北京协和医学院、贝勒医学院等研究人员在《美国心脏学会》旗下" Circulation "期刊上发表了一篇题为" Myocardial Rev-erb-Mediated Diurnal Metabolic Rhythm and Obesity Paradox "的研究论文。

该研究表明,在睡眠期间和白天活动期间,心脏的代谢以不同的能量来源供给。心肌细胞中的Rev-erbα/β调控正常的代谢节律,去除Rev-erbα/β会破坏这种节律,降低心肌细胞在睡眠期间使用脂质的能力,导致进行性扩张型心肌病和致命的心力衰竭

在该研究中,研究人员分析了小鼠清醒和睡眠期间的基因和蛋白表达,以及一组全面的代谢物和脂质,发现Rev-erbα/β基因仅在睡眠时间内高度表达,其活性与脂肪和糖代谢有关。

对此,研究人员猜测,当Rev-erbα/β敲除,心脏在睡眠期间不能有效利用脂肪酸时,就没有足够的能量维持跳动,从而导致进行性扩张性心肌病

为了验证这一猜测,研究人员分析了敲除Rev-erbα/β的小鼠,通过对心肌细胞的分析发现,敲除Rev-erbα/β的小鼠在睡眠期间降低了脂肪利用率,相反,提高了糖的利用率。

结果表明,在睡眠阶段,心脏利用脂肪释放的脂肪酸作为主要的能量来源,敲除Rev-erbα/β,心脏会有代谢缺陷,在睡眠期间限制脂肪酸的使用,而在活动阶段会过度使用糖

敲除Rev-erbα/β可导致致命性心力衰竭

接下来,研究人员又分析了补充脂肪酸是否会改善这种情况。

研究人员给Rev-erbα/β基因敲除的两组小鼠分别喂食高脂肪食物。一组喂食高脂肪,另一组喂食高蔗糖饮食,类似于促进肥胖的人类饮食。

研究发现,高蔗糖饮食在一定程度上缓解了心脏缺陷,但高脂肪饮食没有

研究表明,心肌细胞中的Rev-erbα/β调控正常的代谢节律,在动物的睡眠期间,心脏以脂质作为能量来源。去除Rev-erbα/β会破坏这种节律,降低心肌细胞在睡眠期间使用脂质的能力,导致进行性扩张型心肌病和致命的心力衰竭。

重要的是,研究还表明,纠正代谢缺陷有助于改善病情。

高蔗糖饮食缓解了心脏缺陷

研究人员表示,这项研究具有三个临床意义。

首先,发现心脏昼夜节律与心脏扩张的严重程度相关

第二,肥胖和胰岛素抵抗,这两个长期被认为是导致心力衰竭的临床危险因素,却可以起到保护作用

最后,通过药物控制脂肪酸和糖代谢可以改善病情,但重要的是给药与相应代谢途径的内在昼夜节律一致

研究人员强调,该研究突出了时间疗法的重要性,即根据昼夜节律安排药物治疗,不仅在这项研究中如此,对许多其他药物也是如此,在安排用药时将昼夜节律考虑在内是非常重要的。

原始出处:

Shiyang Song , Chih-Liang Tien , Hao Cui, et al. Myocardial Rev-erb-Mediated Diurnal Metabolic Rhythm and Obesity Paradox. Circulation. 2022;0.

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    2022-01-20 ms8000001859380106

    以后不敢熬夜了

    0

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    2022-01-19 ms4000001513304915

    学习#学习#

    0

  4. [GetPortalCommentsPageByObjectIdResponse(id=2070630, encodeId=2f8b20e06301a, content=<a href='/topic/show?id=a13a54112f5' target=_blank style='color:#2F92EE;'>#我国学者#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=49, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=54112, encryptionId=a13a54112f5, topicName=我国学者)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=743b215, createdName=fusion, createdTime=Mon Jan 31 20:08:01 CST 2022, time=2022-01-31, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1186268, encodeId=dbab118626819, content=以后不敢熬夜了, beContent=null, objectType=article, channel=null, level=null, likeNumber=52, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b0686454051, createdName=ms8000001859380106, createdTime=Thu Jan 20 05:31:03 CST 2022, time=2022-01-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1186226, encodeId=146d11862265a, content=学习<a href='/topic/show?id=23e3454e353' target=_blank style='color:#2F92EE;'>#学习#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=45473, encryptionId=23e3454e353, topicName=学习)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a1646442901, createdName=ms4000001513304915, createdTime=Wed Jan 19 23:42:28 CST 2022, time=2022-01-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1186209, encodeId=a3f21186209ae, content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7c592194322, createdName=1209e435m98(暂无昵称), createdTime=Wed Jan 19 23:07:06 CST 2022, time=2022-01-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1186151, encodeId=c61a118615124, content=what, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210814/61deb584a399410ca9b720adee4e6850/71825fee35134aee90c3ed9dfe89b69f.jpg, createdBy=3cff5430616, createdName=云舒, createdTime=Wed Jan 19 20:28:57 CST 2022, time=2022-01-19, status=1, ipAttribution=)]
    2022-01-19 1209e435m98(暂无昵称)

    学习了,谢谢分享

    0

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    2022-01-19 云舒

    what

    0

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