Use of a Small Molecule CCR5 Inhibitor in Macaques to Treat Simian Immunodeficiency Virus Infection or Prevent Simian-human Immunodeficiency Virus Infection
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General Medicine
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Human immunodeficiency virus type 1 (HIV-1) fuses with cells after sequential interactions between its envelope glycoproteins, CD4 and a coreceptor, usually CC chemokine receptor 5 (CCR5) or CXC receptor 4 (CXCR4). CMPD 167 is a CCR5-specific small molecule with potent antiviral activity in vitro. We show that CMPD 167 caused a rapid and substantial (4-200-fold) decrease in plasma viremia in six rhesus macaques chronically infected with simian immunodeficiency virus (SIV) strains SIVmac251 or SIVB670, but not in an animal infected with the X4 simian-human immunodeficiency virus (SHIV), SHIV-89.6P. In three of the SIV-infected animals, viremia reduction was sustained. In one, there was a rapid, but partial, rebound and in another, there was a rapid and complete rebound. There was a substantial delay (>21 d) between the end of therapy and the onset of full viremia rebound in two animals. We also evaluated whether vaginal administration of gel-formulated CMPD 167 could prevent vaginal transmission of the R5 virus, SHIV-162P4. Complete protection occurred in only 2 of 11 animals, but early viral replication was significantly less in the 11 CMPD 167-recipients than in 9 controls receiving carrier gel. These findings support the development of small molecule CCR5 inhibitors as antiviral therapies, and possibly as components of a topical microbicide to prevent HIV-1 sexual transmission.
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Jasinska A, Pandrea I, Apetrei C Front Immunol. 2022; 13:835994.
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Galectins as potential therapeutic targets in STIs in the female genital tract.
Lujan A, Croci D, Rabinovich G, Damiani M Nat Rev Urol. 2022; 19(4):240-252.
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Loss of CXCR6 coreceptor usage characterizes pathogenic lentiviruses.
Wetzel K, Yi Y, Yadav A, Bauer A, Bello E, Romero D PLoS Pathog. 2018; 14(4):e1007003.
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Wetzel K, Yi Y, Elliott S, Romero D, Jacquelin B, Hahn B J Virol. 2016; 91(4).
PMID: 27903799 PMC: 5286873. DOI: 10.1128/JVI.01626-16.