Document 0783 DOCN M9550783 TI The Th1-Th2 hypothesis of HIV infection: new insights. DT 9505 AU Clerici M; Shearer GM; Cattedra di Immunologia, Universita degli Studi, Milano, Italy. SO Immunol Today. 1994 Dec;15(12):575-81. Unique Identifier : AIDSLINE MED/95151146 AB In their earlier, much quoted, viewpoint article, Mario Clerici and Gene Shearer examined the role of T helper 1 (Th1)- and Th2-type responses in immune dysregulation associated with human immunodeficiency virus (HIV) infection. In this article, they consider the complications of a Th1-Th2 model raised by the nomenclature, discuss the issue of cytokine production by non-T cells, and compare data obtained from T-cell clones with heterogeneous populations of leukocytes from patients. They define Th-cell responses and cytokine profiles as 'type 1' and 'type 2', and reemphasize the importance of strong cellular immune responses, along with the cytokines that augment and maintain such responses, in protective immunity against HIV infection and AIDS progression. Finally, they present a model of activation-induced, cytokine-modulated, programmed cell death as a major factor in the pathogenesis of HIV infection and AIDS. DE Apoptosis Cytokines/PHYSIOLOGY Human HIV Infections/*IMMUNOLOGY/THERAPY Models, Biological Support, Non-U.S. Gov't Th1 Cells/*PHYSIOLOGY Th2 Cells/*PHYSIOLOGY JOURNAL ARTICLE REVIEW REVIEW, TUTORIAL SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).