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Neurology:常规的血液测试或可预测卒中发作风险

2016-03-08 佚名 生物谷

一项关于缺血性卒中的新发现可能允许医生们利用常见的血液测试和病人的基因特征来预测他们第二次卒中发作风险。 研究人员已发现高水平的C反应蛋白(C-Reactive Protein, CRP)---血液中发现的一种酶---与复发的缺血性卒中风险增加存在关联。CRP是由于肝脏对炎症作出反应而产生的,而且人们已经通过检测它来测量病人患上冠状动脉疾病的风险。这项新的研究提示着对缺血性卒中病

一项关于缺血性卒中的新发现可能允许医生们利用常见的血液测试和病人的基因特征来预测他们第二次卒中发作风险。

研究人员已发现高水平的C反应蛋白(C-Reactive Protein, CRP)---血液中发现的一种酶---与复发的缺血性卒中风险增加存在关联。CRP是由于肝脏对炎症作出反应而产生的,而且人们已经通过检测它来测量病人患上冠状动脉疾病的风险。这项新的研究提示着对缺血性卒中病人而言,它可能也是一种有用的工具。

美国弗吉尼亚大学医学院研究员Stephen Williams博士说,“对已经历卒中发作的病人而言,死亡的最大风险是卒中再次发作。因此,非常重要的事情就是能够寻找卒中再次发作风险最高的那些人。”

缺血性卒中风险

缺血性卒中是由于流向大脑中的血液受阻而产生的,大约占了85%的卒中病例;剩下的卒中病例是出血性卒中(hemorrhagic stroke),是由于血管破裂后血液流进大脑中而产生的。

为了更好地理解缺血性卒中,Williams和他的同事们着手确定我们的基因如何影响我们血液中诸如CRP之类的生物标志物的水平。他们不仅发现上升的CRP水平提示着增加的卒中风险,而且他们还鉴定出促进这种风险提高的基因变异:他们在2100名参与维他命介入卒中预防临床试验(Vitamin Intervention for Stroke Prevention Trial, VISP)的人当中,检测到CRP基因单核苷酸多态性(SNP)与血液中的CRP水平存在关联,其中最为关联的CRP SNP就是rs2592902;他们还鉴定出AKR1D1基因座位上的一个SNP:rs2589998也与CRP水平存在关联;而且他们还鉴定出之前已被发现的FGB基因和LEPR基因上的SNP与血液中的纤维蛋白原(fibrinogen)水平存在关联。最后,他们发现在这些VISP参与者中,CRP相关性SNP和CRP水平与缺血性卒中和复发性卒中显著相关联;纤维蛋白原水平而不是纤维蛋白原相关性SNP也与复发性卒中存在关联。相关研究结果近期发表在Neurology期刊上,论文标题为“Shared genetic susceptibility of vascular-related biomarkers with ischemic and recurrent stroke”。

Williams说道,他们发现这些影响CRP水平的基因变异会增加复发性卒中发作风险,而且这种相同的遗传易感性不仅与增加的CRP水平相关联,而且也与增加的卒中风险相关联。

Williams畅想着有那么一天:医生们可能根据病人的CRP水平和基因特征确定病人的第二次卒中发作的整体风险。不过,即便仅仅是CRP水平也可能是一种有用的评估初次卒中发作后复发性卒中发作风险的工具。Williams说,“测量一个人的CRP水平非常简单。只需采集一下血液即可。你不必做一些诸如活组织检测之类的事情,这是因为病人可能不愿意做。不过,当与基因信息结合在一起时,我们可能有更大的能力鉴定出有更大风险的病人。”

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  2. [GetPortalCommentsPageByObjectIdResponse(id=1951117, encodeId=c9ba195111e42, content=<a href='/topic/show?id=580a89302c6' target=_blank style='color:#2F92EE;'>#血液测试#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=89302, encryptionId=580a89302c6, topicName=血液测试)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e12a151, createdName=yangeasy, createdTime=Fri May 06 12:06:00 CST 2016, time=2016-05-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=105853, encodeId=0b95105853ed, content=这篇资讯带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=102, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzUn81b5CF5ibVPib8jWI92iciaxmqGHlwruOnK4SVZykd4iahqo1hicklIibyZoxm55X7EM8BW9eX1h1hQ2/0, createdBy=8aa81937526, createdName=李东泽, createdTime=Sat Aug 27 22:07:00 CST 2016, time=2016-08-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1999658, encodeId=1dcf19996580d, content=<a href='/topic/show?id=d5df12695e6' target=_blank style='color:#2F92EE;'>#Neurol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12695, encryptionId=d5df12695e6, topicName=Neurol)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8217292, createdName=yinhl1978, createdTime=Sun Nov 27 20:06:00 CST 2016, time=2016-11-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=69461, encodeId=9b9569461f2, content=CRP真的很神奇, beContent=null, objectType=article, channel=null, level=null, likeNumber=166, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=80c31700233, createdName=MDSC, createdTime=Mon Mar 14 22:54:00 CST 2016, time=2016-03-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=69460, encodeId=8a81694603e, content=CRP真的很神奇, beContent=null, objectType=article, channel=null, level=null, likeNumber=199, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=80c31700233, createdName=MDSC, createdTime=Mon Mar 14 22:53:00 CST 2016, time=2016-03-14, status=1, ipAttribution=)]
    2016-08-27 李东泽

    这篇资讯带给我们新知识,启发新思维,不论是科研还是临床工作都有很大的帮助。。。

    0

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    2016-11-27 yinhl1978
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    2016-03-14 MDSC

    CRP真的很神奇

    0

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    2016-03-14 MDSC

    CRP真的很神奇

    0

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Nature:从血液入手早期确诊癌症之王

根据德克萨斯大学MD安德森癌症中心的一项研究,存在于癌症外泌体(exosomes)上的glypican-1 (GPC1)基因编码蛋白,或许可以作为一种潜在非侵入性诊断和筛查工具的组成部分,用来检测有可能尚处于适合手术治疗阶段的早期胰腺癌。这项研究工作发布在6月24日的《自然》(Nature)杂志上。 外泌体是由癌细胞分泌的一种微型病毒样大小的颗粒,其中包含着DNA、RNA和蛋白质。科学家们从

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