alexa Long-term reduction in peripheral blood HIV type 1 reservoirs following reduced-intensity conditioning allogeneic stem cell transplantation.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Genetic Syndromes & Gene Therapy

Author(s): Henrich TJ, Hu Z, Li JZ, Sciaranghella G, Busch MP,

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Abstract BACKGROUND: The long-term impact of allogeneic hematopoietic stem cell transplantation (HSCT) on human immunodeficiency virus type 1 (HIV-1) reservoirs in patients receiving combination antiretroviral therapy (cART) is largely unknown. METHODS: We studied the effects of a reduced-intensity conditioning allogeneic HSCT from donors with wild-type-CCR5(+) cells on HIV-1 peripheral blood reservoirs in 2 patients heterozygous for the ccr5Δ32 mutation. In-depth analyses of the HIV-1 reservoir size in peripheral blood, coreceptor use, and specific antibody responses were performed on samples obtained before and up to 3.5 years after HSCT receipt. RESULTS: Although HIV-1 DNA was readily detected in peripheral blood mononuclear cells (PBMCs) before and 2-3 months after HSCT receipt, HIV-1 DNA and RNA were undetectable in PBMCs, CD4(+) T cells, or plasma up to 21 and 42 months after HSCT. The loss of detectable HIV-1 correlated temporally with full donor chimerism, development of graft-versus-host disease, and decreases in HIV-specific antibody levels. CONCLUSIONS: The ability of donor cells to engraft without evidence of ongoing HIV-1 infection suggests that HIV-1 replication may be fully suppressed during cART and does not contribute to maintenance of viral reservoirs in peripheral blood in our patients. HSCTs with wild-type-CCR5(+) donor cells can lead to a sustained reduction in the size of the peripheral reservoir of HIV-1.
This article was published in J Infect Dis and referenced in Journal of Genetic Syndromes & Gene Therapy

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