Circulation:早上容易动脉梗阻,晚上容易静脉梗阻

2019-09-26 MedSci MedSci原创

急性心血管并发症的发生率与时间高度相关。但缺血性血管事件节律性的潜在机制尚不明确。虽然白细胞数量增多与心血管并发症风险的增加有关,但对不同血管床中节律性白细胞粘附的作用尚不明确。研究人员采用实时多通道活体荧光显微镜评估肿瘤坏死因子诱导型急性炎症模型小鼠动静脉和微循环中的白细胞募集情况。辅以遗传、外科和药物消融交感神经或肾上腺素能受体,来评估其与节律性白细胞粘附的相关性。此外,研究人员还通过靶向生物

急性心血管并发症的发生率与时间高度相关。但缺血性血管事件节律性的潜在机制尚不明确。虽然白细胞数量增多与心血管并发症风险的增加有关,但对不同血管床中节律性白细胞粘附的作用尚不明确。

研究人员采用实时多通道活体荧光显微镜评估肿瘤坏死因子诱导型急性炎症模型小鼠动静脉和微循环中的白细胞募集情况。辅以遗传、外科和药物消融交感神经或肾上腺素能受体,来评估其与节律性白细胞粘附的相关性。此外,研究人员还通过靶向生物钟基因Bmal1来分析白细胞震荡和血管壁成分在该过程中的作用。

急性炎症的体内定量成像分析显示,小鼠大血管和微血管的白细胞募集具有24小时节律。动静脉白细胞黏附峰值时间不一致,动脉中最高是在早上,静脉中最高是在晚上。这种相移受节律性微环境和血管类型特异性振荡模式的调控。破坏交感神经后,小细胞黏附分子和白细胞黏附的差异消失,提示交感神经和β肾上腺素受体信号在该过程中具有至关重要的作用。敲除白细胞、内皮细胞或动脉壁细胞的生物钟基因Bmal1会影响血管类型特异性方式的震荡。粘附白细胞的血管内反应的节律性导致早晨动脉中血小板的相互作用和晚上静脉中血小板之间的相互作用增强,因此在不同时间更容易发生不同血管的急性血栓形成。

总而言之,本研究结果揭示了动脉相关性交感神经支配在控制动静脉血管炎症节律性中的重要作用,以及其对时间依赖性血管类型特异性血栓事件的潜在影响。

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    2021-07-24 ms2000000182667314

    学到了

    0

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    2020-03-27 fusion
  3. [GetPortalCommentsPageByObjectIdResponse(id=1002255, encodeId=361a100225518, content=学到了, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a0a85549889, createdName=ms2000000182667314, createdTime=Sat Jul 24 16:57:08 CST 2021, time=2021-07-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1697976, encodeId=a606169e976d7, content=<a href='/topic/show?id=f2399910109' target=_blank style='color:#2F92EE;'>#静脉#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=99101, encryptionId=f2399910109, topicName=静脉)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=0bc129907796, createdName=fusion, createdTime=Fri Mar 27 00:34:00 CST 2020, time=2020-03-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=373234, encodeId=a5d33e323457, content=学习了,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzTetibytbqFDmFITWHyBWbxU7S9MYibgPSqvu0sYteH0N6zXqbU0Kf3Mbdb7yWM1Kud3zPgYBibE2SZ/0, createdBy=da7696924, createdName=qingfengqishi5, createdTime=Thu Sep 26 21:33:53 CST 2019, time=2019-09-26, status=1, ipAttribution=)]
    2019-09-26 qingfengqishi5

    学习了,学习了

    0