Antioxid Redox Signal:研究发现高血压血管僵硬和弹性结构异常的机制

2017-09-05 MedSci MedSci原创

血管僵硬、结构弹性异常和氧化应激增加是高血压的特征。赖氨酰氧化酶(LOX)是一种弹性蛋白交联酶,可产生副产物过氧化氢。本演技探究了LOX、氧化应激、血管僵硬和弹性蛋白之间的相互作用。将血管紧张素Ⅱ(Ang II)注射到高血压小鼠和自发性高血压大鼠(SHR)后发现,小鼠血管内LOX的表达增加、血管硬度增加,弹性结构异常。血管平滑肌细胞过表达LOX的小鼠(TgLOX)与高血压小鼠表现出相似的力学和弹性

血管僵硬、结构弹性异常和氧化应激增加是高血压的特征。赖氨酰氧化酶(LOX)是一种弹性蛋白交联酶,可产生副产物过氧化氢。本演技探究了LOX、氧化应激、血管僵硬和弹性蛋白之间的相互作用。

将血管紧张素Ⅱ(Ang II)注射到高血压小鼠和自发性高血压大鼠(SHR)后发现,小鼠血管内LOX的表达增加、血管硬度增加,弹性结构异常。血管平滑肌细胞过表达LOX的小鼠(TgLOX)与高血压小鼠表现出相似的力学和弹性蛋白的改变。使用β-氨基丙腈(BAPN)抑制LOX可减小TgLOX小鼠、血管紧张素II注入小鼠及SHR的机械和弹性蛋白改变。来自TgLOX小鼠、Ang II注入小鼠,和/或SHR的动脉H2O2和O2的表达水平增加,NADPH氧化酶的活性增加,和/或线粒体功能障碍也增加。BAPN可防止高血压小鼠较高氧化应激的发生。


使用线粒体靶向超氧化物歧化酶模拟物mito-TEMPO、抗氧化剂或过氧化氢清除剂聚乙二醇共轭过氧化氢酶(PEG过氧化氢酶)治疗TgLOX和AngⅡ注入小鼠和SHR,可降低氧化应激、血管硬度和弹性蛋白的改变。BAPN、mito-TEMPO或PEG-catalase可防止Ang II-infused 和 TgLOX小鼠血管p38丝裂原活化蛋白激酶(p38MAPK)活性的增加。p38MAPK抑制剂SB203580可恢复TgLOX小鼠正常饿血管硬度及血管弹性结构。

该研究确定了LOX是一种新的血管活性氧来源,是高血压血管僵硬和弹性重塑的新途径。总之,该研究发现,LOX表达上调与氧化应激增强有关,可促进p38丝裂原活化蛋白激酶的活化,弹性蛋白结构的改变,以及血管硬化。此通路可导致高血压患者的血管异常。

原始出处:

Sonia Martínez-Revelles, Ana B. García-Redondo, et al., Lysyl Oxidase Induces Vascular Oxidative Stress and Contributes to Arterial Stiffness and Abnormal Elastin Structure in Hypertension: Role of p38MAPK. Antioxid Redox Signal. 2017 Sep 1; 27(7): 379–397. Published online 2017 Sep 1. doi: 10.1089/ars.2016.6642.

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    2018-02-02 yaanren
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    2018-02-25 楚秀娟
  5. [GetPortalCommentsPageByObjectIdResponse(id=1793980, encodeId=390f1e939804b, content=<a href='/topic/show?id=7b3d1630617' target=_blank style='color:#2F92EE;'>#Signal#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16306, encryptionId=7b3d1630617, topicName=Signal)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=102a153, createdName=yaanren, createdTime=Fri Feb 02 19:46:00 CST 2018, time=2018-02-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2055201, encodeId=d19a2055201b6, content=<a href='/topic/show?id=54e38951616' target=_blank style='color:#2F92EE;'>#血管僵硬#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=89516, encryptionId=54e38951616, topicName=血管僵硬)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/TnzXXl41yf6V8fHrDb5JdtxOgpaY6vplUhHtL8BzDh1xMtcap9H1IOlE8umxPGovhIuVkeGTY26eNUFCFaOheQ/132, createdBy=29702500197, createdName=ms6279672939590805, createdTime=Tue May 08 13:46:00 CST 2018, time=2018-05-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1753280, encodeId=53081e53280f2, content=<a href='/topic/show?id=6a57e33772b' target=_blank style='color:#2F92EE;'>#研究发现#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73377, encryptionId=6a57e33772b, topicName=研究发现)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=7e1736602208, createdName=hanhaisha2020, createdTime=Sun Dec 24 01:46:00 CST 2017, time=2017-12-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2036155, encodeId=a3a42036155f7, content=<a href='/topic/show?id=ae7816304dc' target=_blank style='color:#2F92EE;'>#Sign#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=16304, encryptionId=ae7816304dc, topicName=Sign)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e9ed371, createdName=楚秀娟, createdTime=Sun Feb 25 02:46:00 CST 2018, time=2018-02-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=240751, encodeId=4336240e515a, content=非常好的文章.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7LIiaRZTzJ3SEfiauCzTMPW7YvPPYLNJBXG9oh6Al1icq2VQQkIHWxqXehcicTS62YKJVBhxeth3wggw/0, createdBy=7ce01621306, createdName=天涯183, createdTime=Tue Sep 05 14:05:48 CST 2017, time=2017-09-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=240741, encodeId=ea54240e41ab, content=学习了.值得分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, 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=Tue Sep 05 13:09:40 CST 2017, time=2017-09-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=240723, encodeId=0813240e231c, content=谢谢分享.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/Q3auHgzwzM4o2XVpJ6449yqDsjibydI5HnJ8MibGxNn4HZiaZib0bdfibbwoz3KQrIyN9AGxq36ZlZRNicYlPfOOWMtwgsajY6mGNFiaPclFdowjD0/0, createdBy=97bd1338592, createdName=清风拂面, createdTime=Tue Sep 05 12:20:23 CST 2017, time=2017-09-05, status=1, ipAttribution=)]
    2017-09-05 天涯183

    非常好的文章.学习了

    0

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    2017-09-05 1ddf0692m34(暂无匿称)

    学习了.值得分享

    0

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    2017-09-05 清风拂面

    谢谢分享.学习了

    0

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