Blood:导致遗传性血小板减少症的PTPRJ功能性突变

2019-01-22 MedSci MedSci原创

遗传性血小板减少症(ITs)是一种以低血小板计数为特征的异质性疾病,可导致出血倾向。尽管对其遗传因素的研究获得了一定进展,但近50%的家族性血小板减少症患者的病因仍不明确。现Caterina Marconi等人对两对常染色体隐形血小板减少症的兄弟姐妹进行外显子测序,在PTPRJ基因上鉴定出两个等位基因功能丧失性突变。该基因编码受体样蛋白酪氨酸磷酸酶——PTPRJ(或CD148),在血小板和巨核细胞

遗传性血小板减少症(ITs)是一种以低血小板计数为特征的异质性疾病,可导致出血倾向。尽管对其遗传因素的研究获得了一定进展,但近50%的家族性血小板减少症患者的病因仍不明确。

现Caterina Marconi等人对两对常染色体隐形血小板减少症的兄弟姐妹进行外显子测序,在PTPRJ基因上鉴定出两个等位基因功能丧失性突变。该基因编码受体样蛋白酪氨酸磷酸酶——PTPRJ(或CD148),在血小板和巨核细胞中大量表达。与预测效应一致,两个先证者的PTPRJ mRNA和蛋白都几乎完全缺失。

为进一步研究PTPRJ缺陷在体内造血作用中的致病作用,研究人员采用CRISPR/Case9敲除斑马鱼的ptprja(人PTPTJ的同源基因),导致活体CD41+血小板的数量显著降低。而且,在体外,患者的巨核细胞的成熟和先证者的SDF1驱动的迁移、血小板前体形成均受损。沉默人巨核细胞系的PTPRJ可再现在患者巨核细胞中所观察到的功能缺陷。

该基因由PTPRJ突变引起,表现为一种非综合征性的血小板减少症,特征为自发性出血、小血小板、血小板对GPVI激动剂胶原和convulxin的反应受损。上述血小板功能缺陷可归因于Src家族激酶的活化减少。

综上所述,本研究揭示了一种新的IT形成形式以及PTPRJ在血小板生成中的基本作用。


原始出处:

Caterina Marconi, et al. A new form of inherited thrombocytopenia caused by loss-of-function mutations in PTPRJ. Blood 2018 :blood-2018-07-859496; doi: https://doi.org/10.1182/blood-2018-07-859496

本文系梅斯医学(MedSci)原创编译,转载需授权!

评论区 (6)
#插入话题
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    2019-07-05 hxzhang

    #PTPRJ#

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    2019-02-26 般若傻瓜

    #遗传性#

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    2019-10-29 xlxchina

    #功能性#

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    2019-01-23 lingaifan
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    2019-01-23 1e1c07bdm01(暂无匿称)

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1999171, encodeId=31af19991e12e, content=<a href='/topic/show?id=ddba14864d1' target=_blank style='color:#2F92EE;'>#PTPRJ#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14864, encryptionId=ddba14864d1, topicName=PTPRJ)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4f9e287, createdName=hxzhang, createdTime=Fri Jul 05 21:17:00 CST 2019, time=2019-07-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1860067, encodeId=f356186006ea3, content=<a href='/topic/show?id=cc73951054b' target=_blank style='color:#2F92EE;'>#遗传性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=95105, encryptionId=cc73951054b, topicName=遗传性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ad9f79, createdName=般若傻瓜, createdTime=Tue Feb 26 12:17:00 CST 2019, time=2019-02-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1915501, encodeId=3dbd191550175, content=<a href='/topic/show?id=22a1328e7e5' target=_blank style='color:#2F92EE;'>#功能性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=32877, encryptionId=22a1328e7e5, topicName=功能性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=570f404, createdName=xlxchina, createdTime=Tue Oct 29 02:17:00 CST 2019, time=2019-10-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1302810, encodeId=c1611302810d8, content=<a href='/topic/show?id=9c72890153c' target=_blank style='color:#2F92EE;'>#血小板减少#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=89015, encryptionId=9c72890153c, topicName=血小板减少)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e07307, createdName=lingaifan, createdTime=Wed Jan 23 15:17:00 CST 2019, time=2019-01-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=358972, encodeId=bec03589e26a, content=好, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6d551998554, createdName=1e1c07bdm01(暂无匿称), createdTime=Wed Jan 23 06:43:06 CST 2019, time=2019-01-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=358844, encodeId=6fd63588444b, content=好好好好好好好好, beContent=null, objectType=article, channel=null, level=null, likeNumber=119, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://cdnapi.center.medsci.cn/medsci/head/2017/08/29/bbc5cc0eed9b8d17623d2fd49dbdf19a.jpg, createdBy=79522135794, createdName=yjs木玉, createdTime=Tue Jan 22 05:43:22 CST 2019, time=2019-01-22, status=1, ipAttribution=)]
    2019-01-22 yjs木玉

    好好好好好好好好

    0