Aging Cell:淋巴瘤药物依鲁替尼可以缓解AD表型

2021-03-13 haibei MedSci原创

阿尔茨海默病(AD)是一种神经退行性疾病,发病后通常进展缓慢,逐渐恶化。尽管目前关于AD的研究众多,但AD的确切病理机制和有效的治疗策略仍不清楚。

阿尔茨海默病(AD)是一种神经退行性疾病,发病后通常进展缓慢,逐渐恶化。尽管目前关于AD的研究众多,但AD的确切病理机制和有效的治疗策略仍不清楚。

AD以两种神经病理症状为特征:淀粉样蛋白β(Aβ)斑块和神经纤维缠结(NFTs)。Aβ是由淀粉样β前体蛋白(APP)的蛋白分解加工产生的,Aβ的积累会损害记忆力,减少树突棘的形成,增加神经炎症和tau病。

在正常的单体形式下,蛋白tau在稳定微管方面起着重要作用。然而,在病理条件下,高磷酸化的tau从微管上脱落,被泛素化,并聚集成成对的螺旋纤维结构(PHFs)。PHFs可以造成神经毒性和突触NFTs,导致树突棘丢失、认知功能障碍,最后进展为神经退行性疾病。

尽管目前,Aβ和NFTs影响突触和认知功能的分子机制尚未完全阐明,但抑制和/或防止Aβ积累和tau的高磷酸化的药物可能对AD的靶向治疗有用

已有的报道显示,细胞淋巴瘤药物依鲁替尼(ibrutinib)可以在体外和体内调节LPS诱导的神经炎症,但其对阿尔茨海默病(AD)病理和认知功能的影响尚未研究。最近,研究人员探究了依鲁替尼在两种AD小鼠模型中的影响。

在5xFAD小鼠中,注射依鲁替尼可以通过促进APP裂解的非淀粉样蛋白生成途径,显著降低Aβ斑块水平,减少Aβ诱导的神经炎症反应,并通过降低磷酸化环蛋白依赖性激酶-5(p-CDK5)的水平,显著下调tau的磷酸化。

重要的是,在PS19小鼠中注射依鲁替尼也缓解了tau介导的神经炎症和tau磷酸化。

在5xFAD小鼠中,依鲁替尼改善了长期记忆和树突棘数量,而在PS19小鼠中,依鲁替尼没有改变短期和长期记忆,但促进了树突棘的生成。有趣的是,依鲁替尼对树突棘发生的诱导依赖于磷酸肌苷3-激酶(PI3K)的磷酸化。

总的来说,该研究结果表明,依鲁替尼可以调节AD相关病理和认知功能,可能是AD的潜在疗法。

 

原始出处:

Hyun‐ju Lee et al. Ibrutinib modulates Aβ/tau pathology, neuroinflammation, and cognitive function in mouse models of Alzheimer's disease. Aging Cell (2021). 

 

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    2021-04-22 维他命
  3. [GetPortalCommentsPageByObjectIdResponse(id=1872166, encodeId=bced18e216666, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Thu Jun 03 00:55:28 CST 2021, time=2021-06-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1962475, encodeId=24fa19624e5be, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Thu Apr 22 13:55:28 CST 2021, time=2021-04-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1535298, encodeId=93da1535298f9, content=<a href='/topic/show?id=099f9020145' target=_blank style='color:#2F92EE;'>#表型#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=90201, encryptionId=099f9020145, topicName=表型)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=9b6412593156, createdName=tastas, createdTime=Mon Mar 15 02:55:28 CST 2021, time=2021-03-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=947881, encodeId=041c94e8812a, content=棒, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b4261949275, createdName=1e10d85fm69(暂无匿称), createdTime=Sat Mar 13 15:17:28 CST 2021, time=2021-03-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=947873, encodeId=9e0d94e873e6, content=好文章!, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160806/IMG57A5698BDB0244113.jpg, createdBy=32a91358059, createdName=jyzxjiangqin, createdTime=Sat Mar 13 14:47:34 CST 2021, time=2021-03-13, status=1, ipAttribution=)]
    2021-03-15 tastas
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    2021-03-13 jyzxjiangqin

    好文章!

    0

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