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Virology:牙周炎可激活休眠HIV!

2015-02-10 sunshine 译 MedSci原创

短链脂肪酸可通过激活P-TEFb和修饰多种组蛋白唤醒T细胞中的休眠HIV-1摘要:尽管接受了有效的治疗,伴有重度牙周炎的HIV患者其唾液和血浆中的残余病毒的水平仍然较高(HAART)。牙周致病因子中的多个短链脂肪酸(SCFAs)激活Jurkat细胞和休眠的原代T细胞。SCFAs不仅能激活正转录延伸因子b(Tat必不可少的细胞辅助因子),而且还能通过诱导修饰组蛋白来反向染色体。SCFAs能同时通过抑


短链脂肪酸可通过激活P-TEFb和修饰多种组蛋白唤醒T细胞中的休眠HIV-1

摘要:

尽管接受了有效的治疗,伴有重度牙周炎的HIV患者其唾液和血浆中的残余病毒的水平仍然较高(HAART)。牙周致病因子中的多个短链脂肪酸(SCFAs)激活Jurkat细胞和休眠的原代T细胞。SCFAs不仅能激活正转录延伸因子b(Tat必不可少的细胞辅助因子),而且还能通过诱导修饰组蛋白来反向染色体。SCFAs能同时通过抑制1/2类组蛋白去乙酰化酶(HDACs)来提高组蛋白乙酰化,下调3类HDAC SIRT1来降低组蛋白三甲基化的表达。

引言:

牙周致病原和病毒,如HIV,在口腔环境中相互作用促进了疾病的进展。牙周病是由牙周致病原如牙龈卟啉单胞菌(Pg)感染所引起的,并且与慢性炎症有关。相比于HIV阴性的牙周炎患者HIV阳性的牙周炎患者牙菌斑中能发现大量牙周致病菌,而且HIV阳性患者其牙周病的患病率也高,患病程度也重。HIV感染可导致系统免疫缺陷,因此可使机体较易发生慢性牙周炎,而牙周致病菌又可以提高口腔中HIV的感染和病毒的复制,由此形成一个恶性循环。

革兰阴性厌氧菌如Pg和Fn能产生至少5种不同的SCFAs代谢产物。重度牙周炎患者的龈沟液中可发现不同毫摩尔水平的SCFAs,而健康个体的龈沟液中却检测不到SCFAs。其中一种SCFAs—丁酸,在培养的Pg和Fn的上清液中最先发现,丁酸是刺激HIV-1转录的转录分子。丁酸抑制组蛋白去乙酰化酶,导致组蛋白乙酰化,诱导病毒基因表达和复制。

本研究中,我们研究的是不同的SCFAs是否都可以诱导T细胞中休眠的HIV-1转录。首先,静息T细胞包含较低水平的P-TEFb,这是HIV转录蛋白Tab必不可少的辅助因子。其次,由于组蛋白去乙酰化酶未表达,组蛋白甲基转移酶和DNA甲基化大大延迟了转录起始时间。最后,转录起始因子NF- κB 和NFAT隐藏在细胞质内,可反转录染色体的前病毒。尽管诸多限制,通过细胞因子或T细胞受体的激活刺激记忆T细胞,可使HIV转录、复制和传播。

结果:

培养的牙周致病菌其上清液可强烈诱导HIV-1转录;牙周致病原产生多种SCFAs可诱导休眠的HIV-1转录;SCFAs诱导休眠T细胞模型中HIV-1转录;SCFAs激活 P-TEFb使得原代细胞中前病毒活化;重度牙周炎患者唾液中含有较高水平的SCFAs,并可以诱导休眠的HIV-1前病毒转录;

SCFAs抑制1/2类 HDACs活性;SCFAs下调3类 HDAC SIRT1,抑制组蛋白甲基转移酶EZH2和SUV39H1;SIRT1 和EZH2在HIV-1 LTR 中作为复合体表达;敲除或抑制SIRT1诱导HIV-1表达。

结论:

我们已经证明牙周致病菌的多种SCFAs代谢产物可作为激活休眠HIV-1转录的潜在的激活剂。我们的研究揭示了一个新的机制:这些细菌代谢物通过上调P-TEFb和下调其表观表达以创造出适宜HIV转录的环境。这些新的发现为慢性牙周炎与口腔中HIV转录水平的提高之间的流行病学关系提供了新的见解,并且强调了对HIV感染患者治疗牙周病的重要性。

原始出处:

Das B1, Dobrowolski C1, Shahir AM2, Feng Z3, Yu X3, Sha J3, Bissada NF2, Weinberg A3, Karn J4, Ye F5.Short chain fatty acids potently induce latent HIV-1 in T-cells by activating P-TEFb and multiple histone modifications.Virology. 2015 Jan 1;474:65-81. doi: 10.1016/j.virol.2014.10.033. Epub 2014 Nov 14.

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    2016-09-13 1e10c84am36(暂无匿称)

    好文章,还会关注

    0

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  3. [GetPortalCommentsPageByObjectIdResponse(id=125419, encodeId=1d74125419f2, content=好文章,还会关注, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzdAIB7UwTkHt6fQkBP8ictliaXtc5gCUmYdAW1sAETC2nhO3q6YjRHkUibyOCtP8ibmXNObTyd63A076/0, createdBy=d4111948983, createdName=1e10c84am36(暂无匿称), createdTime=Tue Sep 13 14:37:00 CST 2016, time=2016-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2077350, encodeId=676820e7350fe, content=<a href='/topic/show?id=cb141845040' target=_blank style='color:#2F92EE;'>#Virol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=18450, encryptionId=cb141845040, topicName=Virol)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/FGFAawy0kQNXbuvUuLtUVrx5aKhOIkwqJwyxu0QlpLFIDSb1Ht19ptXvYBjuAoNBubibnNF3iazdpico7gJlbBVQg/132, createdBy=edaf2500125, createdName=ms3892185887221420, createdTime=Mon Mar 16 16:39:00 CST 2015, time=2015-03-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1668055, encodeId=c9501668055c5, content=<a href='/topic/show?id=902125e1351' target=_blank style='color:#2F92EE;'>#休眠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=25713, encryptionId=902125e1351, topicName=休眠)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=34e226239625, createdName=yese, createdTime=Mon Oct 19 03:39:00 CST 2015, time=2015-10-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=15799, encodeId=d57015e9927, content=以阅, beContent=null, objectType=article, channel=null, level=null, likeNumber=149, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c68e1614119, createdName=windmilL1989, createdTime=Mon Feb 16 14:06:00 CST 2015, time=2015-02-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1450379, encodeId=765114503e913, content=<a href='/topic/show?id=f0476e49582' target=_blank style='color:#2F92EE;'>#牙周#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=67495, encryptionId=f0476e49582, topicName=牙周)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ab585558129, createdName=liuyong2982, createdTime=Thu Feb 12 00:39:00 CST 2015, time=2015-02-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=15319, encodeId=a1a3153190d, content=HIV患者牙周组织表现很明显, beContent=null, objectType=article, channel=null, level=null, likeNumber=233, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=ixiaochengdudu, createdTime=Tue Feb 10 10:24:00 CST 2015, time=2015-02-10, status=1, ipAttribution=)]
    2015-10-19 yese
  4. [GetPortalCommentsPageByObjectIdResponse(id=125419, encodeId=1d74125419f2, content=好文章,还会关注, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzdAIB7UwTkHt6fQkBP8ictliaXtc5gCUmYdAW1sAETC2nhO3q6YjRHkUibyOCtP8ibmXNObTyd63A076/0, createdBy=d4111948983, createdName=1e10c84am36(暂无匿称), createdTime=Tue Sep 13 14:37:00 CST 2016, time=2016-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2077350, encodeId=676820e7350fe, content=<a href='/topic/show?id=cb141845040' target=_blank style='color:#2F92EE;'>#Virol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=18450, encryptionId=cb141845040, topicName=Virol)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/FGFAawy0kQNXbuvUuLtUVrx5aKhOIkwqJwyxu0QlpLFIDSb1Ht19ptXvYBjuAoNBubibnNF3iazdpico7gJlbBVQg/132, createdBy=edaf2500125, createdName=ms3892185887221420, createdTime=Mon Mar 16 16:39:00 CST 2015, time=2015-03-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1668055, encodeId=c9501668055c5, content=<a href='/topic/show?id=902125e1351' target=_blank style='color:#2F92EE;'>#休眠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=25713, encryptionId=902125e1351, topicName=休眠)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=34e226239625, createdName=yese, createdTime=Mon Oct 19 03:39:00 CST 2015, time=2015-10-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=15799, encodeId=d57015e9927, content=以阅, beContent=null, objectType=article, channel=null, level=null, likeNumber=149, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c68e1614119, createdName=windmilL1989, createdTime=Mon Feb 16 14:06:00 CST 2015, time=2015-02-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1450379, encodeId=765114503e913, content=<a href='/topic/show?id=f0476e49582' target=_blank style='color:#2F92EE;'>#牙周#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=67495, encryptionId=f0476e49582, topicName=牙周)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ab585558129, createdName=liuyong2982, createdTime=Thu Feb 12 00:39:00 CST 2015, time=2015-02-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=15319, encodeId=a1a3153190d, content=HIV患者牙周组织表现很明显, beContent=null, objectType=article, channel=null, level=null, likeNumber=233, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=ixiaochengdudu, createdTime=Tue Feb 10 10:24:00 CST 2015, time=2015-02-10, status=1, ipAttribution=)]
    2015-02-16 windmilL1989

    以阅

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=125419, encodeId=1d74125419f2, content=好文章,还会关注, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzdAIB7UwTkHt6fQkBP8ictliaXtc5gCUmYdAW1sAETC2nhO3q6YjRHkUibyOCtP8ibmXNObTyd63A076/0, createdBy=d4111948983, createdName=1e10c84am36(暂无匿称), createdTime=Tue Sep 13 14:37:00 CST 2016, time=2016-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2077350, encodeId=676820e7350fe, content=<a href='/topic/show?id=cb141845040' target=_blank style='color:#2F92EE;'>#Virol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=18450, encryptionId=cb141845040, topicName=Virol)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/FGFAawy0kQNXbuvUuLtUVrx5aKhOIkwqJwyxu0QlpLFIDSb1Ht19ptXvYBjuAoNBubibnNF3iazdpico7gJlbBVQg/132, createdBy=edaf2500125, createdName=ms3892185887221420, createdTime=Mon Mar 16 16:39:00 CST 2015, time=2015-03-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1668055, encodeId=c9501668055c5, content=<a href='/topic/show?id=902125e1351' target=_blank style='color:#2F92EE;'>#休眠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=25713, encryptionId=902125e1351, topicName=休眠)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=34e226239625, createdName=yese, createdTime=Mon Oct 19 03:39:00 CST 2015, time=2015-10-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=15799, encodeId=d57015e9927, content=以阅, beContent=null, objectType=article, channel=null, level=null, likeNumber=149, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c68e1614119, createdName=windmilL1989, createdTime=Mon Feb 16 14:06:00 CST 2015, time=2015-02-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1450379, encodeId=765114503e913, content=<a href='/topic/show?id=f0476e49582' target=_blank style='color:#2F92EE;'>#牙周#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=67495, encryptionId=f0476e49582, topicName=牙周)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ab585558129, createdName=liuyong2982, createdTime=Thu Feb 12 00:39:00 CST 2015, time=2015-02-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=15319, encodeId=a1a3153190d, content=HIV患者牙周组织表现很明显, beContent=null, objectType=article, channel=null, level=null, likeNumber=233, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=ixiaochengdudu, createdTime=Tue Feb 10 10:24:00 CST 2015, time=2015-02-10, status=1, ipAttribution=)]
  6. [GetPortalCommentsPageByObjectIdResponse(id=125419, encodeId=1d74125419f2, content=好文章,还会关注, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzdAIB7UwTkHt6fQkBP8ictliaXtc5gCUmYdAW1sAETC2nhO3q6YjRHkUibyOCtP8ibmXNObTyd63A076/0, createdBy=d4111948983, createdName=1e10c84am36(暂无匿称), createdTime=Tue Sep 13 14:37:00 CST 2016, time=2016-09-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2077350, encodeId=676820e7350fe, content=<a href='/topic/show?id=cb141845040' target=_blank style='color:#2F92EE;'>#Virol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=18450, encryptionId=cb141845040, topicName=Virol)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/FGFAawy0kQNXbuvUuLtUVrx5aKhOIkwqJwyxu0QlpLFIDSb1Ht19ptXvYBjuAoNBubibnNF3iazdpico7gJlbBVQg/132, createdBy=edaf2500125, createdName=ms3892185887221420, createdTime=Mon Mar 16 16:39:00 CST 2015, time=2015-03-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1668055, encodeId=c9501668055c5, content=<a href='/topic/show?id=902125e1351' target=_blank style='color:#2F92EE;'>#休眠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=25713, encryptionId=902125e1351, topicName=休眠)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=34e226239625, createdName=yese, createdTime=Mon Oct 19 03:39:00 CST 2015, time=2015-10-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=15799, encodeId=d57015e9927, content=以阅, beContent=null, objectType=article, channel=null, level=null, likeNumber=149, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c68e1614119, createdName=windmilL1989, createdTime=Mon Feb 16 14:06:00 CST 2015, time=2015-02-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1450379, encodeId=765114503e913, content=<a href='/topic/show?id=f0476e49582' target=_blank style='color:#2F92EE;'>#牙周#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=67495, encryptionId=f0476e49582, topicName=牙周)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ab585558129, createdName=liuyong2982, createdTime=Thu Feb 12 00:39:00 CST 2015, time=2015-02-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=15319, encodeId=a1a3153190d, content=HIV患者牙周组织表现很明显, beContent=null, objectType=article, channel=null, level=null, likeNumber=233, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=ixiaochengdudu, createdTime=Tue Feb 10 10:24:00 CST 2015, time=2015-02-10, status=1, ipAttribution=)]
    2015-02-10 ixiaochengdudu

    HIV患者牙周组织表现很明显

    0

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