Blood:miR-125a-5p通过肌动蛋白结合蛋白L-Plastin调节血小板前体的形成

2020-07-17 MedSci原创 MedSci原创

巨核细胞miR-125a-5p通过靶向肌动蛋白结合蛋白L-plastin正向调节血小板前体的形成和血小板数量。L-plastin调节巨核细胞迁移、血小板分支、足突形成和内陷膜系统发育。

个体间血小板计数存在遗传变异,更好理解其调控遗传因素或可解析血小板的生成过程。MicroRNAs (miRs)参与调控正常情况和多种疾病的基因表达,miRs缺乏的巨核细胞(MKs)和血小板计数较低,但是关于miRs在正常人MK和血小板生成中的作用尚不明确。

通过全基因组miR谱分析,Bhatlekar等观察到人骨髓MK、血小板和分化的脐带血来源的MK培养物之间存在很强的相关性,并明确MK的miR-125a-5p与人的血小板数量有关,但与白细胞或血红蛋白水平无关。

过表达和敲低试验显示,在体外,miR-125a-5p可正性调控人MK血小板前体(PP)的形成。抑制体内的miR-125a-5p可降低小鼠血小板计数。

对MK和血小板的转录组进行分析发现,LCP1是miR-125a-5p的靶点。LCP1编码肌动蛋白结合蛋白,L-plastin,既往未在MK中研究过。研究人员发现miR-125a-5p直接靶向并降低MK L-plastin的表达。

过表达和敲低试验显示,L-plastin可促进MK前体细胞迁移,但与人血小板计数负相关,L-plastin还可抑制MK PP形成。

本研究表明,miR-125a-5p与血小板计数密切相关,并首次证明了肌动蛋白结合蛋白L-plastin,是人MK PP形成的调节因子。miR-125a-5p和L-plastin可能是增加体外血小板生成及治疗血小板缺陷相关疾病的靶标。

原始出处:

Seema Bhatlekar,et al. miR-125a-5p Regulates Megakaryocyte Proplatelet Formation Via the Actin Bundling Protein L-Plastin. Blood. July 7,2020

版权声明:
本网站所有内容来源注明为“梅斯医学”或“MedSci原创”的文字、图片和音视频资料,版权均属于梅斯医学所有。非经授权,任何媒体、网站或个人不得转载,授权转载时须注明来源为“梅斯医学”。其它来源的文章系转载文章,或“梅斯号”自媒体发布的文章,仅系出于传递更多信息之目的,本站仅负责审核内容合规,其内容不代表本站立场,本站不负责内容的准确性和版权。如果存在侵权、或不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
在此留言
评论区 (4)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=1930784, encodeId=9d631930e84e8, content=<a href='/topic/show?id=22f61180211' target=_blank style='color:#2F92EE;'>#miR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11802, encryptionId=22f61180211, topicName=miR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a27288, createdName=smallant2002, createdTime=Fri May 14 22:46:48 CST 2021, time=2021-05-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1992845, encodeId=0eee1992845b2, content=<a href='/topic/show?id=1c5780908fc' target=_blank style='color:#2F92EE;'>#肌动蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=80908, encryptionId=1c5780908fc, topicName=肌动蛋白)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ca6a2500099, createdName=more is better!, createdTime=Wed Mar 31 11:46:48 CST 2021, time=2021-03-31, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1712488, encodeId=55771e1248898, content=<a href='/topic/show?id=9a1c289680' target=_blank style='color:#2F92EE;'>#AST#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2896, encryptionId=9a1c289680, topicName=AST)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=8b9831894722, createdName=ms24272190615788285182, createdTime=Sun Apr 04 03:46:48 CST 2021, time=2021-04-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1811932, encodeId=570b1811932b4, content=<a href='/topic/show?id=98838902198' target=_blank style='color:#2F92EE;'>#血小板前体#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=89021, encryptionId=98838902198, topicName=血小板前体)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2726119, createdName=july_975, createdTime=Mon Jul 27 21:46:48 CST 2020, time=2020-07-27, status=1, ipAttribution=)]
    2021-05-14 smallant2002
  2. [GetPortalCommentsPageByObjectIdResponse(id=1930784, encodeId=9d631930e84e8, content=<a href='/topic/show?id=22f61180211' target=_blank style='color:#2F92EE;'>#miR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11802, encryptionId=22f61180211, topicName=miR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a27288, createdName=smallant2002, createdTime=Fri May 14 22:46:48 CST 2021, time=2021-05-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1992845, encodeId=0eee1992845b2, content=<a href='/topic/show?id=1c5780908fc' target=_blank style='color:#2F92EE;'>#肌动蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=80908, encryptionId=1c5780908fc, topicName=肌动蛋白)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ca6a2500099, createdName=more is better!, createdTime=Wed Mar 31 11:46:48 CST 2021, time=2021-03-31, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1712488, encodeId=55771e1248898, content=<a href='/topic/show?id=9a1c289680' target=_blank style='color:#2F92EE;'>#AST#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2896, encryptionId=9a1c289680, topicName=AST)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=8b9831894722, createdName=ms24272190615788285182, createdTime=Sun Apr 04 03:46:48 CST 2021, time=2021-04-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1811932, encodeId=570b1811932b4, content=<a href='/topic/show?id=98838902198' target=_blank style='color:#2F92EE;'>#血小板前体#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=89021, encryptionId=98838902198, topicName=血小板前体)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2726119, createdName=july_975, createdTime=Mon Jul 27 21:46:48 CST 2020, time=2020-07-27, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=1930784, encodeId=9d631930e84e8, content=<a href='/topic/show?id=22f61180211' target=_blank style='color:#2F92EE;'>#miR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11802, encryptionId=22f61180211, topicName=miR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a27288, createdName=smallant2002, createdTime=Fri May 14 22:46:48 CST 2021, time=2021-05-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1992845, encodeId=0eee1992845b2, content=<a href='/topic/show?id=1c5780908fc' target=_blank style='color:#2F92EE;'>#肌动蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=80908, encryptionId=1c5780908fc, topicName=肌动蛋白)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ca6a2500099, createdName=more is better!, createdTime=Wed Mar 31 11:46:48 CST 2021, time=2021-03-31, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1712488, encodeId=55771e1248898, content=<a href='/topic/show?id=9a1c289680' target=_blank style='color:#2F92EE;'>#AST#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2896, encryptionId=9a1c289680, topicName=AST)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=8b9831894722, createdName=ms24272190615788285182, createdTime=Sun Apr 04 03:46:48 CST 2021, time=2021-04-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1811932, encodeId=570b1811932b4, content=<a href='/topic/show?id=98838902198' target=_blank style='color:#2F92EE;'>#血小板前体#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=89021, encryptionId=98838902198, topicName=血小板前体)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2726119, createdName=july_975, createdTime=Mon Jul 27 21:46:48 CST 2020, time=2020-07-27, status=1, ipAttribution=)]
  4. [GetPortalCommentsPageByObjectIdResponse(id=1930784, encodeId=9d631930e84e8, content=<a href='/topic/show?id=22f61180211' target=_blank style='color:#2F92EE;'>#miR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11802, encryptionId=22f61180211, topicName=miR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a27288, createdName=smallant2002, createdTime=Fri May 14 22:46:48 CST 2021, time=2021-05-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1992845, encodeId=0eee1992845b2, content=<a href='/topic/show?id=1c5780908fc' target=_blank style='color:#2F92EE;'>#肌动蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=80908, encryptionId=1c5780908fc, topicName=肌动蛋白)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ca6a2500099, createdName=more is better!, createdTime=Wed Mar 31 11:46:48 CST 2021, time=2021-03-31, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1712488, encodeId=55771e1248898, content=<a href='/topic/show?id=9a1c289680' target=_blank style='color:#2F92EE;'>#AST#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2896, encryptionId=9a1c289680, topicName=AST)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=8b9831894722, createdName=ms24272190615788285182, createdTime=Sun Apr 04 03:46:48 CST 2021, time=2021-04-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1811932, encodeId=570b1811932b4, content=<a href='/topic/show?id=98838902198' target=_blank style='color:#2F92EE;'>#血小板前体#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=89021, encryptionId=98838902198, topicName=血小板前体)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2726119, createdName=july_975, createdTime=Mon Jul 27 21:46:48 CST 2020, time=2020-07-27, status=1, ipAttribution=)]

相关资讯

Blood:ECM-整合素受体轴在原发性骨髓纤维化巨核细胞异常增殖中的作用

整合素a5b1的a5亚基在PMF的JAK2V617F+巨核细胞中表达上调,导致对纤连蛋白的粘附性增强。 无论是在体内还是体外,抗体介导的a5亚基抑制均可阻止JAK2V617F+巨核细胞谱系扩增。

Blood:Scl和Lyl1在血小板产生和功能中发挥相同的作用

干细胞白血病(Scl或Tal1)蛋白是正常巨核细胞生成过程中所必需的多聚转录因子复合体的一部分。但与该复合物的其他成员如Gata1、Fli1和Runx1不同,尚未发现Scl突变能引发遗传性血小板减少症。Chiu等人推测与其关系密切的家族成员淋巴细胞白血病1 (Lyl1)的功能冗余或可解释了这现象。为了明确在巨核细胞生成过程中,Lyl1是否可以替代Scl,研究人员检测了巨核细胞缺乏一种或两种因子的小

Blood:血小板特异性抗体检测的新方法

在人体内,血小板膜糖蛋白多态性具有免疫原性,是引起新生儿同种免疫性血小板减少症等疾病的重要临床免疫反应的原因。来源于携带罕见多态性个体的血小板通常难以获得,使得诊断性检测和输注匹配的血小板具有挑战性。I类HLA抗体经常出现在母体血清中,对血小板反应性同种抗体的检测带来额外的干扰。检测人血小板抗原(HPA) 3和9的同种异体抗体尤其具有挑战性,部分原因是由于位于多态氨基酸附近的细胞类型特异性聚糖的存

Blood:巨核细胞钙网蛋白与SOCE的互作异常促进骨髓增生性肿瘤的发生发展

约1/4的原发性血小板增多症或原发性骨髓纤维化患者携带CALR(钙网蛋白的编码基因)的体细胞突变。最常见的突变是缺失52bp(I型突变)和插入5bp(II型突变)。CALR突变导致骨髓增殖表型的机制尚未完全明确。研究人员对健康人和CALR突变型骨髓增生性肿瘤患者来源的巨核细胞中的钙网蛋白和储存操作的钙(Ca2+)进入(SOCE)机制之间的相互作用进行研究。

Blood:PDK1对血小板前体形成必不可少!

在血小板生成过程中,巨核细胞(MKs)在骨髓(BM)中形成血小板前体,并将血小板释放到BM血窦中。磷酸肌醇依赖性蛋白激酶-1 (PDK1)是Ca2+依赖性血小板活化所必需的,但其在MK发展和血小板产生调节中的作用仍不明确。本研究采用MK/血小板特异性敲除方法,研究了PDK1在血栓形成过程中MK成熟和极化调控中的作用。与野生型小鼠(Pdk1fl/fl)相比,Pdk1缺陷小鼠(Pdk1-/-)表现出明

Blood:一种新的红细胞生成调节模式

巨核细胞TGFβ1将造血干细胞和祖细胞(HSPCs)的数量与对红细胞的需求联系起来;干扰巨核细胞TGFβ1轴可使红细胞生成对低剂量的促红细胞生成素敏感并增加红细胞的输出。