High-dose therapy plus autologous hematopoietic stem cell transplantation for human immunodeficiency virus (HIV)-related lymphoma: Results and impact on HIV disease

Background and Objectives. The aim of this study was to assess the feasibility of high-dose chemotherapy plus autologous hematopoietic stem cell transplantation (HDC/AHSCT) in AIDS-related lymphoma (ARL), and its long-term impact in patients with human immunodeficiency virus (HIV) treated with highly active antiretroviral therapy (HAART). Design and Methods. Fourteen patients with relapsed or resistant ARL (8 with non-Hodgkin's lymphoma and 6 with Hodgkin's disease) were treated with HDC/AHSCT while on HAART. HIV-1 proviral DNA load was quantified in 11 grafts. Results. Hematologic reconstitution was good. No toxic deaths occurred. Despite the large number of cells harboring HIV-1 proviral DNA (10⁵ to 10⁹) re-infused with the graft, HAART controlled HIV replication and led to CD4 cell reconstitution in 7 of the 8 patients who were still alive six months after AHSCT. Only two patients had opportunistic infections after AHSCT. There were no significant changes in viral load (VL) or CD4⁺ cell counts in most patients. One month after AHSCT, 10 patients were in complete remission (CR). Seven patients died from lymphoma between 1 and 10 months after AHSCT, and a further two patients died in CR (one from AIDS at 16 months, one from another tumor at 28 months). Five patients are alive: four are in CR, 14, 19, 32 and 49 months after AHSCT (median CD4⁺ cell count= 445/μL; undetectable VL in 3 patients), and one is being treated for relapsed lymphoma 36 months after AHSCT. Interpretations and Conclusions. HDC/AHSCT is feasible in AIDS-related lymphoma, in terms of harvesting, engraftment, adverse events and HIV control. It should be proposed to patients with poor-prognosis chemosensitive lymphoma.