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Int J Radiat Biol:低剂量电离辐射危害心血管健康

2017-07-16 佚名 来宝网

近日在《the International Journal of Radiation Biology》期刊发表的一项研究显示,电离辐射(比如x-射线)在低剂量的情况下,对心血管系统也有负面影响。

近日在《the International Journal of Radiation Biology》期刊发表的一项研究显示,电离辐射(比如x-射线)在低剂量的情况下,对心血管系统也有负面影响。

总所周知,人暴露于医疗设备或环境中的电离辐射中心血管系统都会有不适的感觉或症状,由此提示,电离辐射可增加心血管疾病的风险。该研究显示,暴露于低剂量的电离辐射(大约为5Gy,相当于反复进行CT扫描)也会显着增加心血管损伤的风险。由此而产生了这样的问题,自然环境中存在的低剂量电离辐射会不会对人的心血管系统产生影响。

来自德国环境健康研究中心的Soile Tapio医生和Omid Azimzadeh医生进行了相关的研究。他们研究了在0.5Gy的电离辐射下,人冠状动脉内皮细胞的变化,结果发现这些内皮细胞产生了若干个永久的变化,这种变化对维持冠状动脉内皮细胞的功能十分不利。

内皮细胞形成血管的内层,在低剂量电离辐射下,内皮细胞产生的一氧化氮的量减少,一氧化氮是维持若干生理过程的必要分子(比如血管收缩)。之前有研究显示,高剂量辐射(16Gy)可持续减少小鼠血清中一氧化氮的水平。本研究是第一项显示在低剂量辐射的作用下也会削弱一氧化氮作用的研究。

研究还发现在低剂量的电离辐射下,内皮细胞还会产生更多的活性氧(ROS)。ROS是正常的氧代谢的副产物,在细胞信号通路中有重要的作用。ROS水平升高可导致DNA和蛋白质损伤。

此外,研究者还发现,暴露于低剂量电离辐射的内皮细胞降解被氧化的蛋白质的能力下降,并且会提前衰老。低剂量的电离辐射对内皮细胞的这种伤害并不会马上出现(1天内),而是一种长期损伤(1-2个星期内出现)。心脏内皮细胞在机体中并不是快速分裂的细胞类型,因此实验中观察到的这种损伤会长期影响机体的功能。

原始出处:
Azimzadeh O, Subramanian V, Stnder S,et al, Proteome analysis of irradiated endothelial cells reveals persistent alteration in protein degradation and the RhoGDI and NO signalling pathways, Int J Radiat Biol. 2017 Jul 11:1-9. doi: 10.1080/09553002.2017.1339332.

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    2018-05-28 sunylz
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    2017-07-18 jiyangfei
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  7. [GetPortalCommentsPageByObjectIdResponse(id=1767179, encodeId=f1b21e671796c, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Wed Feb 07 11:12:00 CST 2018, time=2018-02-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1917570, encodeId=cc0f191e57033, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Mon May 28 23:12:00 CST 2018, time=2018-05-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1637933, encodeId=bad1163e93371, content=<a href='/topic/show?id=afda591646' target=_blank style='color:#2F92EE;'>#DIA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5916, encryptionId=afda591646, topicName=DIA)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=987022654425, createdName=ms9608593228839890, createdTime=Tue May 15 20:12:00 CST 2018, time=2018-05-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1662470, encodeId=95f016624e09b, content=<a href='/topic/show?id=ae61e014686' target=_blank style='color:#2F92EE;'>#电离辐射#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=84, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=70146, encryptionId=ae61e014686, topicName=电离辐射)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=9a4e25405553, createdName=ms2536978994064944, createdTime=Fri Jun 01 05:12:00 CST 2018, time=2018-06-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1349340, encodeId=7510134934063, content=<a href='/topic/show?id=838593e35b2' target=_blank style='color:#2F92EE;'>#辐射#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=93735, encryptionId=838593e35b2, topicName=辐射)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8e4c53, createdName=jiyangfei, createdTime=Tue Jul 18 03:12:00 CST 2017, time=2017-07-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1480452, encodeId=a6341480452e8, content=<a href='/topic/show?id=647d2615939' target=_blank style='color:#2F92EE;'>#低剂量#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=26159, encryptionId=647d2615939, topicName=低剂量)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=97b17641126, createdName=ms1292405679162969, createdTime=Tue Jul 18 03:12:00 CST 2017, time=2017-07-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=222933, encodeId=b31e22293396, content=学习了,涨知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=89, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220115/46bcf39c32de4aa6b45c5f9d66c8ee77/6cb4a20c55bb4b7691122f47747bfca2.jpg, createdBy=9dad1662329, createdName=1ddf0692m34(暂无匿称), createdTime=Sun Jul 16 14:13:33 CST 2017, time=2017-07-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=222925, encodeId=eb54222925ce, content=注意接触环境,避免长期电辐射。, beContent=null, objectType=article, channel=null, level=null, likeNumber=98, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://q.qlogo.cn/qqapp/1103841572/C3426ED027FF661B0C576A5B3127C2E8/40, createdBy=39dc1706090, createdName=QQ25ed180f, createdTime=Sun Jul 16 13:35:38 CST 2017, time=2017-07-16, status=1, ipAttribution=)]
    2017-07-16 1ddf0692m34(暂无匿称)

    学习了,涨知识

    0

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    2017-07-16 QQ25ed180f

    注意接触环境,避免长期电辐射。

    0

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