Opposite Effects of SDF-1 on Human Immunodeficiency Virus Type 1 Replication

Opposite Effects of SDF-1 on Human Immunodeficiency Virus Type 1 Replication
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SDF-1 对人类免疫缺陷病毒 1 型复制的相反作用

DOI:
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发表时间:
1999
影响因子:
5.4
通讯作者:
O. Schwartz
O. Schwartz
中科院分区:
医学2区
文献类型:
--
作者:
V. Maréchal;F. Arenzana‐Seisdedos;J. Heard;O. Schwartz

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中文摘要α-趋化因子SDF-1与CXCR 4(人类免疫缺陷病毒1型(HIV-1)的辅助受体)结合,并抑制由该受体介导的病毒进入。由于趋化因子是有效的化学引诱剂和白细胞激活剂,我们研究了SDF-1对HIV靶细胞的刺激是否影响不同向性病毒的复制。我们观察到,SDF-1抑制X4株的进入,并增加携带嗜CCR 5的HIV-1包膜或水泡性口炎病毒G包膜的颗粒的感染性。与SDF-1对X4菌株的抑制作用(处于进入水平)相反,其刺激作用不涉及酶-受体相互作用或前病毒DNA合成。相反,我们观察到在趋化因子存在下,达特反式激活HIV-1长末端重复序列的能力增加。因此,SDF-1对HIV-1生命周期的影响可能是多重的和相反的,包括抑制病毒进入和刺激前病毒基因表达。
ABSTRACT The α-chemokine SDF-1 binds CXCR4, a coreceptor for human immunodeficiency virus type 1 (HIV-1), and inhibits viral entry mediated by this receptor. Since chemokines are potent chemoattractants and activators of leukocytes, we examined whether the stimulation of HIV target cells by SDF-1 affects the replication of virus with different tropisms. We observed that SDF-1 inhibited the entry of X4 strains and increased the infectivity of particles bearing either a CCR5-tropic HIV-1 envelope or a vesicular stomatitis virus G envelope. In contrast to the inhibitory effect of SDF-1 on X4 strains, which is at the level of entry, the stimulatory effect does not involve envelope-receptor interactions or proviral DNA synthesis. Rather, we observed an increased ability of Tat to transactivate the HIV-1 long terminal repeat in the presence of the chemokine. Therefore, the effects of SDF-1 on the HIV-1 life cycle can be multiple and opposite, including both an inhibition of viral entry and a stimulation of proviral gene expression.
DOI: --
发表时间: --
期刊: --
影响因子: --
作者:
A. Amara;S. Le Gall;Olivier Schwartz;Jean Salamero;Monica Montes;P. Loetscher;Marco Baggiolini;J. Virelizier;F. Arenzana‐Seisdedos;A. Amara;S. Le Gall
通讯作者: A. Amara;S. Le Gall;Olivier Schwartz;Jean Salamero;Monica Montes;P. Loetscher;Marco Baggiolini;J. Virelizier;F. Arenzana‐Seisdedos;A. Amara;S. Le Gall
人类 T 细胞系中 CXCR4 趋化因子受体的鉴定和表征:配体结合、生物活性和 HIV-1 感染性。
DOI: --
发表时间: 1998
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Hesselgesser,J;Liang,M;Hoxie,J;Greenberg,M;Brass,LF;Orsini,MJ;Taub,D;Horuk,R
通讯作者: Horuk,R
DOI: 10.1084/jem.184.3.1101
发表时间: 1996-09-01
期刊: The Journal of experimental medicine
影响因子: --
作者:
Bleul CC;Fuhlbrigge RC;Casasnovas JM;Aiuti A;Springer TA
通讯作者: Springer TA