Document 0782 DOCN M9590782 TI Evidence that measles virus hemagglutinin initiates modulation of leukocyte function-associated antigen 1 expression. DT 9509 AU Nagendra AR; Smith CW; Wyde PR; Department of Microbiology and Immunology, Baylor College of; Medicine, Houston, Texas 77030, USA. SO J Virol. 1995 Jul;69(7):4357-63. Unique Identifier : AIDSLINE MED/95287491 AB Measles virus (MV), human immunodeficiency virus, Epstein-Barr virus, and other leukotropic viruses can modulate the expression of leukocyte function antigen 1 (LFA-1) on the surface of infected and nearby leukocytes. This ability to induce changes in LFA-1 expression may play an important role in the pathogenesis of these viruses. However, the mechanism(s) involved in virus-mediated regulation of LFA-1 is unknown. Evidence is presented in this report that it is the MV hemagglutinin (H) protein that initiates up-regulation of LFA-1 expression in leukocyte cultures infected with this virus. Indeed, comparison of the abilities of different MV strains to modulate LFA-1 expression, examination of published nucleotide sequences for the H proteins of different vaccine strains, and competitive inhibition assays using oligopeptides homologous or heterologous to a region of the H protein gene encompassing amino acid 116 (from the amino terminus) all suggest that it is this portion of the H protein that is responsible for MV-induced alteration of LFA-1. These comparisons also support the hypothesis that there is a relationship between the abilities of different MV strains to alter LFA-1 expression and their pathogenic potentials. DE Amino Acid Sequence Animal Antibodies, Monoclonal/IMMUNOLOGY Cell Aggregation Cells, Cultured Cercopithecus aethiops Hemagglutinins, Viral/GENETICS/*PHYSIOLOGY Human Lymphocyte Function-Associated Antigen-1/*ANALYSIS Measles Virus/*PHYSIOLOGY Molecular Sequence Data Oligopeptides/PHARMACOLOGY Support, U.S. Gov't, P.H.S. Vero Cells JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).