Cardiovasc Res:钙结合蛋白, S100A1,有望成为新的肺动脉高压(PAH)治疗靶点

2015-03-10 沐晴 译 MedSci原创

S100A1 是一种10-kD的Ca+结合蛋白,表达于血管内皮细胞,与内皮型一氧化氮合酶(eNOS)相结合。S100A1的缺失与NO的生成受损和轻度高血压有关。临床和实验研究证明,内皮细胞功能紊乱可以引起肺血管高压,最近,有研究验证了去除小鼠的S100A1,对肺血流动力学、内皮细胞功能、NO的产生及相关的信号途径和内皮细胞凋亡的影响。研究结果显示,与野生型小鼠(WT组)相比,S100A1基因敲出小

S100A1 是一种10-kD的Ca+结合蛋白,表达于血管内皮细胞,与内皮型一氧化氮合酶(eNOS)相结合。S100A1的缺失与NO的生成受损和轻度高血压有关。临床和实验研究证明,内皮细胞功能紊乱可以引起肺血管高压,最近,有研究验证了去除小鼠的S100A1,对肺血流动力学、内皮细胞功能、NO的产生及相关的信号途径和内皮细胞凋亡的影响。


研究结果显示,与野生型小鼠(WT组)相比,S100A1基因敲出小鼠(KO组)表现出右心室重量/体重的比值增加,且在左心室充盈压不变的情况下,右心室的压力升高。与WT组相比,在KO组离体肺组织中,基础NO水平降低,对乙酰胆碱的剂量反应性减弱,基础的和由血管紧张素(AII)诱导的肺血管阻力增加。对KO组使用S100A1预处理,可以减弱AII诱导的肺动脉压和肺血管阻力的增加。与WT组相比,KO组的肺血管内皮细胞中,S100A1诱导的eNOS, Akt, and ERK1/2的磷酸化作用减弱。与WT组相比,KO组基础的和TNF诱导的内皮细胞的凋亡增加,使用S100A1治疗后,细胞的存活率增加。

最终,研究者认为,S100A1的缺失可能导致肺血管高压。修复S100A1的正常功能,可以通过Akt/ERK1/2信号途径,感应eNOS的活性和NO的水平,来提高肺血管内皮细胞的功能,并且促进内皮细胞的存活。外源性的应用S100A1可以治疗S100A1缺失的基因型疾病,有可能成为一个新的肺动脉高压(PAH)的治疗靶点。

原始出处:

Teichert-Kuliszewska K, Tsoporis JN, Desjardins JF, et.al.Absence of the calcium binding protein, S100A1, confers pulmonary hypertension in mice associated with endothelial dysfunction and apoptosis. Cardiovasc Res. 2015 Jan 1;105(1):8-19. doi: 10.1093/cvr/cvu241. Epub 2014 Nov 12PMID:25395393[PubMed - in process ]

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    2015-08-21 quxin068
  4. [GetPortalCommentsPageByObjectIdResponse(id=1895314, encodeId=582c18953140a, content=<a href='/topic/show?id=18ae64e21d3' target=_blank style='color:#2F92EE;'>#治疗靶点#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=64721, encryptionId=18ae64e21d3, topicName=治疗靶点)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=80c5136, createdName=drj2003, createdTime=Thu May 28 08:01:00 CST 2015, time=2015-05-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1925127, encodeId=a59e192512ee7, content=<a href='/topic/show?id=26d633354c9' target=_blank style='color:#2F92EE;'>#动脉高压#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=33354, encryptionId=26d633354c9, topicName=动脉高压)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=44a360, createdName=jklm09, createdTime=Mon Mar 23 10:01:00 CST 2015, time=2015-03-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1938466, encodeId=62b919384665d, content=<a href='/topic/show?id=1c292818fd' target=_blank style='color:#2F92EE;'>#ASC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2818, encryptionId=1c292818fd, topicName=ASC)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=74808, createdName=quxin068, createdTime=Fri Aug 21 16:01:00 CST 2015, time=2015-08-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1460189, encodeId=22401460189d3, content=<a href='/topic/show?id=1519136e641' target=_blank style='color:#2F92EE;'>#PAH#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13676, encryptionId=1519136e641, topicName=PAH)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=87966261195, createdName=hb2010ye, createdTime=Thu Mar 12 01:01:00 CST 2015, time=2015-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=18083, encodeId=6ba51808382, content=好的,了解了, beContent=null, objectType=article, channel=null, level=null, likeNumber=89, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=hbwang006, createdTime=Tue Mar 10 20:27:00 CST 2015, time=2015-03-10, status=1, ipAttribution=)]
    2015-03-12 hb2010ye
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    2015-03-10 hbwang006

    好的,了解了

    0