Aging Cell:长寿药物NAD+可以防止共济失调症中STING诱导的衰老

2021-03-28 haibei MedSci原创

衰老是由干扰素基因的刺激物(STING)介导的,并涉及异位细胞质DNA。研究人员进一步表明,用烟酰胺核苷(NR)提高细胞内NAD+水平可以通过促进PINK1依赖性的线粒体自噬来防止衰老和SASP。

ATM激酶由共济失调(ATM)基因编码,是DNA双链断裂修复反应的主调节因子,有助于保持细胞内的氧化还原平衡。在对DNA损伤的反应中,ATM通过自磷酸化被激活,然后磷酸化几个下游蛋白,增强DNA修复。

在人类中,ATM基因的丢失会导致共济失调症(A-T),这是一种罕见的遗传性常染色体隐性遗传病,其特征是癌症易感性、放射敏感性、神经变性、不育性和获得性免疫缺陷。A-T患者还表现出多种炎症表型,可能与T细胞和B细胞发育失败有关。虽然A-T的一些主要特征反映了DNA双链断裂修复效率低下,但目前,我们对于A-T中小脑萎缩的分子机制却知之甚少。

衰老表型和线粒体功能紊乱与衰老和早衰疾病有关,包括共济失调性疾病(A-T)。线粒体功能的丧失可以驱动大脑中与年龄相关的退行,但目前,我们对于改善线粒体稳态是否可以缓解衰老表型知之甚少。

最近,研究人员在Aging Cell发文证明,线粒体功能障碍,细胞衰老,以及衰老相关的分泌表型(SASP)可以在A-T患者成纤维细胞,以及ATM缺陷细胞和小鼠中被观察到。

衰老是由干扰素基因的刺激物(STING)介导的,并涉及异位细胞质DNA。研究人员进一步表明,用烟酰胺核苷(NR)提高细胞内NAD+水平可以通过促进PINK1依赖性的线粒体自噬来防止衰老和SASP

NR治疗还可以防止神经变性,抑制衰老和神经炎症,并改善Atm-/-小鼠的运动功能。

因此,该研究结果表明,线粒体功能障碍诱导的衰老在A-T发病机制中起着核心作用,而增强线粒体自噬可以作为一种潜在的治疗干预手段。

 

原始出处:

Beimeng Yang et al. NAD+ supplementation prevents STING‐induced senescence in ataxia telangiectasia by improving mitophagy. Aging Cell (2021). 

 

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    2021-12-01 cenghis
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    2021-12-15 维他命
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    2021-05-05 小小医者

    #共济失调#仍然仅仅是基础研究层面,临床不一定真有用

    0

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    2021-03-30 lxg955
  6. [GetPortalCommentsPageByObjectIdResponse(id=1872180, encodeId=538d18e2180a2, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Sun Feb 13 15:04:26 CST 2022, time=2022-02-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1941944, encodeId=d11719419441a, content=<a href='/topic/show?id=08ab96909c6' target=_blank style='color:#2F92EE;'>#长寿药#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=96909, encryptionId=08ab96909c6, topicName=长寿药)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=afa4194, createdName=cenghis, createdTime=Wed Dec 01 23:04:26 CST 2021, time=2021-12-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1962489, encodeId=532719624891c, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Wed Dec 15 05:04:26 CST 2021, time=2021-12-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=962901, encodeId=f79c96290180, content=<a href='/topic/show?id=b33d30019ae' target=_blank style='color:#2F92EE;'>#共济失调#</a>仍然仅仅是基础研究层面,临床不一定真有用, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=30019, encryptionId=b33d30019ae, topicName=共济失调)], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220519/c2ab253484ee4527a2d4e9589a4821ac/45de9bf494a54becb2ea4369c9d11e85.jpg, createdBy=7a3710, createdName=小小医者, createdTime=Wed May 05 21:08:55 CST 2021, time=2021-05-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1526813, encodeId=36d51526813f8, content=<a href='/topic/show?id=7f6b168088f' target=_blank style='color:#2F92EE;'>#STING#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=52, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16808, encryptionId=7f6b168088f, topicName=STING)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a9ca11763451, createdName=lxg955, createdTime=Tue Mar 30 06:04:26 CST 2021, time=2021-03-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1598506, encodeId=571915985065d, content=<a href='/topic/show?id=829b124e643' target=_blank style='color:#2F92EE;'>#NAD#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12476, encryptionId=829b124e643, topicName=NAD)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=1b0018615070, createdName=pandamao2016, createdTime=Tue Mar 30 06:04:26 CST 2021, time=2021-03-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=951974, encodeId=94389519e47a, content=nad+抗衰老个人感觉有待实验证明, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=18df2566800, createdName=妙酒, createdTime=Mon Mar 29 08:31:06 CST 2021, time=2021-03-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=951887, encodeId=f14d95188e31, content=好文章!, beContent=null, objectType=article, channel=null, level=null, likeNumber=79, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160806/IMG57A5698BDB0244113.jpg, createdBy=32a91358059, createdName=jyzxjiangqin, createdTime=Sun Mar 28 17:09:16 CST 2021, time=2021-03-28, status=1, ipAttribution=)]
    2021-03-30 pandamao2016
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    2021-03-29 妙酒

    nad+抗衰老个人感觉有待实验证明

    0

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    2021-03-28 jyzxjiangqin

    好文章!

    0

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