ATVB:VEGF-A调节清道夫受体BI的细胞定位及HDL跨内皮转运

2017-04-19 MedSci MedSci原创

低密度脂蛋白和高密度脂蛋白(LDL和HDL)必须通过内皮层,在血管壁内分别发挥促进和抑制动脉粥样硬化作用。然而,限制脂蛋白跨内皮转运速率的因素尚不清楚。因此,本研究用激酶药物抑制剂做高通量筛选,以鉴定跨内皮转运LDL和HDL的调节剂。用141种激酶抑制药物和荧光标记的LDL或HDL孵育人主动脉内皮细胞,继而进行基于显微镜的高通量筛选。血管内皮生长因子受体(VEGFR)的抑制剂显着抑制HDL而不是L

低密度脂蛋白和高密度脂蛋白(LDL和HDL)必须通过内皮层,在血管壁内分别发挥促进和抑制动脉粥样硬化作用。然而,限制脂蛋白跨内皮转运速率的因素尚不清楚。因此,本研究用激酶药物抑制剂做高通量筛选,以鉴定跨内皮转运LDL和HDL的调节剂。

用141种激酶抑制药物和荧光标记的LDL或HDL孵育人主动脉内皮细胞,继而进行基于显微镜的高通量筛选。血管内皮生长因子受体(VEGFR)的抑制剂显着抑制HDL而不是LDL的摄取。敲低VEGFR 2显着降低125I-HDL而不是125I-LDL的细胞结合、偶联和跨内皮转运。使用RNA干扰VEGFR1或VEGFR3并无影响。在VEGF-A缺失的细胞培养基中,HDL而非LDL的结合、摄取和转运显着降低,再给予VEGF-A可恢复这一现象。 VEGF-A对HDL的内皮结合、摄取和转运的恢复作用可被磷脂酰肌醇3激酶/蛋白激酶B或p38丝裂原活化蛋白激酶抑制,也可被清道夫受体BI敲低而消除。此外,发现VEGF-A存在是清道夫受体BI在内皮细胞质膜中定位的先决条件。

VEGF作为HDL而非LDL的跨内皮转运的调节因子,说明内皮是脂蛋白进入血管壁的特异性、可药用的屏障。

原始出处:


Velagapudi S, Yalcinkaya M, et al. VEGF-A Regulates Cellular Localization of SR-BI as Well as Transendothelial Transport of HDL but Not LDL.Arterioscler Thromb Vasc Biol. 2017 Mar 30. pii: ATVBAHA.117.309284.

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    2017-10-09 gongliu
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    2018-01-19 yzh409
  3. [GetPortalCommentsPageByObjectIdResponse(id=1977951, encodeId=4a2119e795131, content=<a href='/topic/show?id=20411e958de' target=_blank style='color:#2F92EE;'>#TVB#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17958, encryptionId=20411e958de, topicName=TVB)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1a5a149, createdName=gongliu, createdTime=Mon Oct 09 13:00:00 CST 2017, time=2017-10-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1696274, encodeId=cfb716962e497, content=<a href='/topic/show?id=0107934e0a5' target=_blank style='color:#2F92EE;'>#转运#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=93470, encryptionId=0107934e0a5, topicName=转运)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=47c429881595, createdName=yzh409, createdTime=Fri Jan 19 16:00:00 CST 2018, time=2018-01-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1316424, encodeId=98421316424b4, content=<a href='/topic/show?id=73f386080a' target=_blank style='color:#2F92EE;'>#HDL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8608, encryptionId=73f386080a, topicName=HDL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7fb6449, createdName=ZGMFX24A, createdTime=Thu Apr 20 15:00:00 CST 2017, time=2017-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1368473, encodeId=ccde13684e36b, content=<a href='/topic/show?id=25aa1833e88' target=_blank style='color:#2F92EE;'>#VEGF#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=18337, encryptionId=25aa1833e88, topicName=VEGF)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=80ca273, createdName=fanweitanzhen, createdTime=Thu Apr 20 15:00:00 CST 2017, time=2017-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=188767, encodeId=3272188e67b6, content=好的,科研好的发展好, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160718/IMG578C993D395567540.jpg, createdBy=59b81918946, createdName=flysky120, createdTime=Wed Apr 19 10:07:54 CST 2017, time=2017-04-19, status=1, ipAttribution=)]
    2017-04-20 ZGMFX24A
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    2017-04-19 flysky120

    好的,科研好的发展好

    0

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