Biological Psychiatry:早期检测阿尔兹海默病研究进展

2017-04-14 申勇 生物帮

2017年3月27日,国际精神病学《Biological Psychiatry》杂志在线发表了中国科学技术大学申勇教授实验室联合法国巴黎皮埃尔居里大学的 Harald Hampel教授,瑞典哥德堡大学临床神经科学中心的Kaj Blennow,美国佛罗里达州罗斯坎特老年医学研究所李人教授以及美国Emory大学阿尔兹海默病研究中心的Allan Levey 教授等共同发表了题为(Increased

2017年3月27日,国际精神病学《Biological Psychiatry》杂志在线发表了中国科学技术大学申勇教授实验室联合法国巴黎皮埃尔居里大学的 Harald Hampel教授,瑞典哥德堡大学临床神经科学中心的Kaj Blennow,美国佛罗里达州罗斯坎特老年医学研究所李人教授以及美国Emory大学阿尔兹海默病研究中心的Allan Levey 教授等共同发表了题为(Increased Plasma Beta-Secretase 1 May Predict Conversion to Alzheimer's Disease Dementia in Individuals With Mild Cognitive Impairment) 的研究论文。该研究主要在血液中检测了β-分泌酶活性。该酶在血中的酶活性可以在早期临床阶段,即轻度认知损害状态预测阿尔茨海默病(AD)的发生发展。

阿尔兹海默病又称老年痴呆病是指人在老的时候大脑的认知功能减退,包括在发病初期症记忆力下降,情绪异常,逐渐丧失生活自理能力,不仅病人痛苦不堪,也给家庭和社会带来沉重的负担。目前,对其病因不清楚,也尚无有效治疗AD的方法。因此该病也称之为世纪之难病。寻找早期有效的诊断标记物为早期为病人及家属做好各方面准备以及为今后有效的治疗药物的鉴定 已迫在眉睫。

一般来说,β-分泌酶(BACE1)被认为在AD病理和生理学中起着重要的作用。在发育过程中,以及在患阿尔兹海默病脑内的神经元中高度表达。通过这种酶剪切的淀粉样前体蛋白(APP)参与将前体蛋白剪切成β-淀粉样蛋白(Aβ),促进助痴呆大脑中Aβ蛋白的产生和淀粉样斑块的形成。

申勇教授说:我们的研究揭示了阿尔兹海默病早期也就是轻度认知障碍(MCI)患者和阿尔兹海默病(AD)患者的血中BACE1蛋白表达水平和其酶活性均比对照组健康老年人上升很多,而且BACE1的酶活性也随着疾病严重发展程度成正比。申勇博士还继续说道“我们的研究是第一个使用淀粉蛋白合成及限速酶,BACE1,的酶活性用作于血液的生物标记物,并且能够跟踪阿尔兹海默病的病情发展,而且其酶活性和疾病严重程度成正比。想强调的是我们的研究还有一个亮点,不但揭示了阿尔兹海默病早期也就是轻度认知障碍(MCI)AD的早期阶段,而且我们发现轻度认知障碍转化成阿尔兹海默病的病人血中的BACE1酶活性就高,而没有转化成阿尔兹海默病的轻度认知障碍患者的血BACE1酶活性就不高。也就是血的酶活性可以预测轻度认知障碍是否向阿尔兹海默病的转换。

李人教授评论道:血中BAce1的酶活性可能成为阿尔兹海默病病程发展的一个有效的生物标志物,这也可能可以用于目前临床治疗阿尔兹海默病病程发展的药物试验的一个有用检测的工具。特别引人注意的是阿尔兹海默病病患者和健康老年人组之间的BACE1活性的差异是非常大的,而且有意思的是,随着时间的推移,血中的BACE1酶的活性随着疾病病程发展越趋增加”。

他们发现,血液(血浆)BACE1活性在MCI显着增加,主要是在个人发展为AD,并可能AD。在AD病人BACE1活性增高者也对AD的临床认知评分恶化相关,即简易精神状态检查表(MMSE)评分。“我们的研究结果表明,BACE1活性可补充早期诊断AD的生物标志物的变化的阵列,诊断和剖析广告可以是一个强大的工具来跟踪疾病的进展”,该研究的资深作者Harald Hampel博士说,彼埃尔和玛丽居里大学,巴黎,法国。汉佩尔博士还说,“baca1作为血液生物标志物也可以作为对BACE抑制剂在AD目前的试验结果,因此优化关键的治疗试验的设计来提高成功的机会”。

法国巴黎皮埃尔居里大学神经病学研究所所长以及大学医院神经科医生及教授Harald Hampel 博士这样评论道:“这是令人振奋的研究!也是一个对阿尔兹海默病早期诊断上非常有前途的生物标志物,而不是用病人的作为阿尔兹海默病脑脊液的诊断。这项研究的一个优势就是疾病病情的严重程度的发展和有关的血液生物的变化提供了相关的独特的变化。显示出其监测疾病进展的潜力,有可能用于评估药物治疗疗效的一个关键的指标,尤其是最近的多个阿尔兹海默病临床试验的失败,部分原因就是缺少客观有效的评估手段和指标。

申勇接着说“如果治疗效果能反映出减缓神经退行性变过程和BACE1酶活性的变化水平的变化成为一个动态过程 ,那么监测血中BACE1酶活性可能就是一个潜在的临床药物试验的药效学指标”

目前,中国科大的申勇和法国皮埃尔居里大学的Harald Hampel,以及德国、瑞典、美国的同事们正在扩大他们的临床样本 。我们将利用淀粉PET分层 技术进行纵向观察那些目前无症状的临床风险的病人,结合这些病人的表型基因型生物标志物研究收集血液和脑脊液样本从阿尔兹海默病患者和轻度认知障碍受试者每六至十二个月对他们的知和行为症状进行评估。看看我们能否用病人的BACE1活性预测疾病的起始、进展和转换为最早出现的临床症状以及脑功能下降率 。美国佛罗丽达的罗斯坎特研究所的李人博士说:“BACE1活性高低可能是“对家族性阿尔兹海默病的病人有用的先行指标”。Harald Hampel博士最后说:“在血里BACE1将会成为我们新成立的“阿尔兹海默病精准医学计划”候选生物标记 和相关的队列,并且同时对药物的成功开发起到促进作用“。
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  1. [GetPortalCommentsPageByObjectIdResponse(id=1917431, encodeId=52e2191e431aa, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Fri Feb 02 10:49:00 CST 2018, time=2018-02-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1792038, encodeId=c0f21e9203877, content=<a href='/topic/show?id=696a14818df' target=_blank style='color:#2F92EE;'>#Psychiatry#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14818, encryptionId=696a14818df, topicName=Psychiatry)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c192448, createdName=diushouji, createdTime=Tue Apr 25 09:49:00 CST 2017, time=2017-04-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=216311, encodeId=0e3021631188, content=可以学习了。, 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/NUyjXTCJjo5WdRCZb0Hs1YiaOB88m23a0oYulDm9Z0Es2N8rk8dmG1tkgXOibgBGBTMpwlof4aic6HdrIeR2zF09okwsgRbedK0/0, createdBy=72f41927023, createdName=Johnson_zhangdr, createdTime=Wed Jun 28 11:18:51 CST 2017, time=2017-06-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767092, encodeId=00c71e67092db, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, 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=Thu Apr 20 22:49:00 CST 2017, time=2017-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1380772, encodeId=e9701380e72bb, content=<a href='/topic/show?id=9281e34519b' target=_blank style='color:#2F92EE;'>#研究进展#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=21, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73451, encryptionId=9281e34519b, topicName=研究进展)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f13d475, createdName=mashirong, createdTime=Sun Apr 16 01:49:00 CST 2017, time=2017-04-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1402713, encodeId=14921402e13e7, content=<a href='/topic/show?id=60ca9e761ce' target=_blank style='color:#2F92EE;'>#阿尔兹海默#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97761, encryptionId=60ca9e761ce, topicName=阿尔兹海默)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=be952422716, createdName=habb, createdTime=Sun Apr 16 01:49:00 CST 2017, time=2017-04-16, status=1, ipAttribution=)]
    2018-02-02 sunylz
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    2017-06-28 Johnson_zhangdr

    可以学习了。

    0

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