Allogeneic Hematopoietic Stem Cell Transplantation in HIV-1 Infected Patients

The purpose of this study is to assess the impact of allogeneic hematopoietic stem cell transplantations (HSCT) in HIV infected patients on the persistence of HIV and the HIV immune response.

1. To assess the impact of HSCT on the immune response to HIV by measuring HIV specific antigens in peripheral blood (via immune assays such as ELISA and Western blot) longitudinally. 2. To measure the decay of persisting HIV by sequencing and quantitating HIV RNA in plasma, and HIV DNA and RNA in peripheral blood cells including CD4+ T cells and CD4+ T cell subsets, as well as in tissue cells derived from fine needle lymph node aspirates, and/or bone marrow aspirates, and/or rectal tissue. 3. To determine the presence of the CCR5 delta 32 allele in the patient prior to and following HSCT which will provide information regarding the presence of this gene in the donor cells. 4. To correlate these findings to the clinical outcome of the individuals enrolled in this study based on their clinical standard of care assessments following HSCT.