Immunologic reconstitution in the acquired immunodeficiency syndrome.

Although effective therapies are available for many of the infections and tumors that occur in patients with the acquired immunodeficiency syndrome (AIDS), no therapy exists for the underlying immunodeficiency. Three approaches used to treat this immunodeficiency have included wholescale immune replacement through lymphocyte transfers, bone marrow transplantation, and thymic implantation; immunologic enhancement with biologic-response modifiers, such as gamma interferon, interleukin-2, and some drugs; and antiretroviral therapy. Because of the persistence of the etiologic virus, both immune replacement and enhancement will probably be ineffective unless effective strategies are developed against the virus. Agents that have shown antiviral activity in vitro which are currently in clinical trials include suramin, heteropolyanion-23 (HPA-23), ribavirin, and alpha interferon. Foscarnet and monoclonal antibodies have yet to enter clinical trials in the United States. It is still too early to tell if any of the antiviral agents will prove of value in the management of patients with AIDS.