Blood:促凝血因子VIIa(FVIIa),不仅促凝血,还可抗炎症!

2018-04-19 MedSci MedSci原创

近期研究表明内皮细胞蛋白C受体(EPCP),除了其已知蛋白C配体和活化的蛋白C(APC),还与多种配体存在互作。Vijay Kondreddy等人在早期的研究中发现促凝血因子VIIa(FVIIa)可与EPCP结合,并下调EPCP介导的抗凝作用,从而诱导内皮屏障的保护作用。现Vijay Kondreddy等人对FVIIa与EPCR互作对活体内皮细胞炎症和LPS诱导的炎性反应的影响进行深入研究。用FV

近期研究表明内皮细胞蛋白C受体(EPCP),除了其已知蛋白C配体和活化的蛋白C(APC),还与多种配体存在互作。

Vijay Kondreddy等人在早期的研究中发现促凝血因子VIIa(FVIIa)可与EPCP结合,并下调EPCP介导的抗凝作用,从而诱导内皮屏障的保护作用。现Vijay Kondreddy等人对FVIIa与EPCR互作对活体内皮细胞炎症和LPS诱导的炎性反应的影响进行深入研究。

用FVIIa处理内皮细胞可抑制TNFα和LPS诱导的细胞黏附分子的表达,进而减少单核细胞黏附到内皮细胞上。通过特异性抗体或siRNA抑制EPCR或蛋白酶激活受体1(PAR1),可消除FVIIa诱导的TNFα抑制和LPS诱导的细胞黏附分子和IL-6的表达抑制。沉默β-抑制蛋白-1可阻滞内皮细胞内的FVIIa诱导的抗炎症作用。

体内研究显示FVIIa治疗可显着抑制LPS诱导的炎性细胞因子和固有免疫细胞浸润野生型和EPCR过表达小鼠的肺,但对于EPCR缺陷性小鼠则无此效应。

机制研究表明FVIIa治疗抑制TNFα-诱导的ERK1/2、p38 MAPK、JNK、NF-κB和C-Jun活化,提示FVIIa介导的信号可阻断TNFα诱导的信号级联反应的上游信号。FVIIa治疗可阻止募集TNF受体相关因子2(TRAF2)到TNF受体1(TNFR1)信号复合体。

总体而言,本研究结果表明FVIIa与EPCR结合,通过PAR1-和β-抑制蛋白-1依赖性信号通路,发挥抗炎性作用。提示临床上多用于治疗大出血的FVIIa,或可有新的治疗潜能。

原始出处:

Vijay Kondreddy,et al.Factor VIIa induces anti-inflammatory signaling via EPCR and PAR1.Blood  2018  :blood-2017-10-813527;  doi: https://doi.org/10.1182/blood-2017-10-813527

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  2. [GetPortalCommentsPageByObjectIdResponse(id=1301013, encodeId=df33130101364, content=<a href='/topic/show?id=997b31316c5' target=_blank style='color:#2F92EE;'>#凝血因子#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=31316, encryptionId=997b31316c5, topicName=凝血因子)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=55f6293, createdName=lishizhe, createdTime=Sat Apr 21 01:21:00 CST 2018, time=2018-04-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=307295, encodeId=fb1c30e2952a, content=好因子 及万千优点于一身, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a35e76003, createdName=871538379, createdTime=Thu Apr 19 13:55:49 CST 2018, time=2018-04-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=307255, encodeId=2a8c30e25563, content=学习了.获益匪浅.感谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3zMoyicyo6ia9f4IuLQAwZoxD6Hx4ibd5CMcOCYhStY6oDibbKK6O2X8iaicldO5ib8j1iapOIobIKCGiczU2A/0, createdBy=56251941490, createdName=虈亣靌, createdTime=Thu Apr 19 11:13:04 CST 2018, time=2018-04-19, status=1, ipAttribution=)]
    2018-04-19 871538379

    好因子 及万千优点于一身

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  3. [GetPortalCommentsPageByObjectIdResponse(id=1301013, encodeId=df33130101364, content=<a href='/topic/show?id=997b31316c5' target=_blank style='color:#2F92EE;'>#凝血因子#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=31316, encryptionId=997b31316c5, topicName=凝血因子)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=55f6293, createdName=lishizhe, createdTime=Sat Apr 21 01:21:00 CST 2018, time=2018-04-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=307295, encodeId=fb1c30e2952a, content=好因子 及万千优点于一身, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a35e76003, createdName=871538379, createdTime=Thu Apr 19 13:55:49 CST 2018, time=2018-04-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=307255, encodeId=2a8c30e25563, content=学习了.获益匪浅.感谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3zMoyicyo6ia9f4IuLQAwZoxD6Hx4ibd5CMcOCYhStY6oDibbKK6O2X8iaicldO5ib8j1iapOIobIKCGiczU2A/0, createdBy=56251941490, createdName=虈亣靌, createdTime=Thu Apr 19 11:13:04 CST 2018, time=2018-04-19, status=1, ipAttribution=)]
    2018-04-19 虈亣靌

    学习了.获益匪浅.感谢分享

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