首次发现父亲心理应激影响子代糖代谢

2016-02-24 李小英等 《细胞代谢》

上海交大医学院研究员陈学进课题组和瑞金医院教授李小英课题组合作,首次发现父亲的心理应激通过表观遗传等机制可调控子代的糖代谢状况,进一步证实了环境因素介导的跨代遗传调控作用。相关研究成果近日发表于《细胞代谢》。 大量人群流行病学研究表明,心理应激与多个疾病的发生发展密切相关。近来的研究表明,母亲的心理应激,尤其是妊娠期间的应激,可促进子代肥胖和Ⅱ型糖尿病的发生。但父亲应激能否影响或调控子代的糖

上海交大医学院研究员陈学进课题组和瑞金医院教授李小英课题组合作,首次发现父亲的心理应激通过表观遗传等机制可调控子代的糖代谢状况,进一步证实了环境因素介导的跨代遗传调控作用。相关研究成果近日发表于《细胞代谢》

大量人群流行病学研究表明,心理应激与多个疾病的发生发展密切相关。近来的研究表明,母亲的心理应激,尤其是妊娠期间的应激,可促进子代肥胖和Ⅱ型糖尿病的发生。但父亲应激能否影响或调控子代的糖代谢情况,却缺乏相关研究。

此次合作团队以C57BL/6小鼠为动物模型,探讨了这一跨代遗传现象及背后的分子机制。研究人员将压力组和控制组的两组小鼠分别与正常雌鼠交配,获得子代小鼠 (F1)。课题组详细观察了两组小鼠(控制组F1、压力组F1)的糖代谢表型后发现:压力组F1小鼠表现为血糖升高。在基因表达层面,压力组F1小鼠肝脏PEPCK的蛋白水平显著增加,提示PEPCK的表达可能受到转录后水平的调节。课题组还筛选出调节PEPCK表达的miRNA-466b-3p在压力组F1小鼠肝脏中显著下调。

课题组发现父亲应激后,血清糖皮质激素水平显著升高,引起精子miRNA-466b-3p启动子区域甲基化程度的增加,并遗传至子代小鼠,导致其肝脏中miR-466b-3p的表达下调,引起PEPCK蛋白表达的增加,从而引发子代小鼠糖异生增加,血糖升高。这项研究进一步证实了环境因素介导的跨代遗传调控作用。

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    2016-02-24 楚钟
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    2016-02-25 zz70
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    2016-02-24 糖果鱼塘

    哦了

    0

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