Document 0065 DOCN M95A0065 TI Sunlight induced progression of AIDS. DT 9510 AU Vincek V; Department of Microbiology and Immunology, University of Miami; School of Medicine, FL 33101, USA. SO Med Hypotheses. 1995 Feb;44(2):119-23. Unique Identifier : AIDSLINE MED/95319349 AB Ultraviolet B (UVB) radiation in sunlight damages the cutaneous immune system of individuals primarily by converting trans-urocanic acid (UCA) to its cis isoform which in turn instigates excessive local, and eventually systemic, levels of tumor necrosis factor-alpha (TNF alpha). UVB radiation and TNF alpha have been found to activate HIV from the latent state, and TNF alpha has been implicated in the pathogenesis of several manifestations of the acquired immune deficiency syndrome (AIDS). We hypothesize that the immunosuppressant properties of TNF alpha and cis-UCA, released by intense sun exposure, can accelerate the onset and progression of AIDS in HIV-infected individuals. DE Acquired Immunodeficiency Syndrome/*PHYSIOPATHOLOGY Animal Disease Progression Epidermis/*IMMUNOLOGY/RADIATION EFFECTS Human HIV/GROWTH & DEVELOPMENT Immune Tolerance/RADIATION EFFECTS Immunocompetence/RADIATION EFFECTS Mice Models, Immunological Prostaglandins E/BIOSYNTHESIS Sunlight/*ADVERSE EFFECTS Support, Non-U.S. Gov't Th2 Cells/IMMUNOLOGY Tumor Necrosis Factor/*SECRETION Ultraviolet Rays/*ADVERSE EFFECTS Urocanic Acid/RADIATION EFFECTS Virus Activation JOURNAL ARTICLE REVIEW REVIEW, TUTORIAL SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).