Opposite Effects of SDF-1 on Human Immunodeficiency Virus Type 1 Replication
Opposite Effects of SDF-1 on Human Immunodeficiency Virus Type 1 Replication
复制标题
SDF-1 对人类免疫缺陷病毒 1 型复制的相反作用
作者:
V. Maréchal;F. Arenzana‐Seisdedos;J. Heard;O. Schwartz
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.
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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
DOI:
10.1073/pnas.90.17.8033
发表时间:
1993-09-01
影响因子:
11.1
作者:
BURNS, JC;FRIEDMANN, T;YEE, JK
通讯作者:
YEE, JK
DOI:
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发表时间:
1998
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
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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:
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作者:
Bleul CC;Fuhlbrigge RC;Casasnovas JM;Aiuti A;Springer TA
通讯作者:
Springer TA