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Antigenic and Functional Characterization Of Rinderpest Virus Envelope Proteins Using Monoclonal Antibodies

¹ Department of Veterinary Public Health, Faculty of Agriculture, Gifu University, 1-1 Yanagido, Gifu 501-11
² National Veterinary Assay Laboratory, Kokubunji, Tokyo 185
³ Fundamental Research Laboratory, Tonen Corporation, Ohimachi, Saitama 354
⁴ Tokyo Metropolitan Institute of Medical Science, Bunkyo-ku, Tokyo 113
and⁵ Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108, Japan

A total of 24 monoclonal antibodies (MAbs) against the haemagglutinin (H) and the fusion protein (F) of rinderpest virus (RPV) were used to characterize their antigenic structure and biological properties, and to analyse natural variation in the envelope proteins of morbilliviruses. The anti-H and anti-F MAbs defined seven and three distinct antigenic sites, respectively. The MAbs to six sites on H were able to neutralize the infectivity of RPV. The addition of guinea-pig complement or anti-mouse immunoglobulin increased the virus-neutralizing antibody titre of most of the anti-H MAbs, including those lacking neutralizing activity. One of the antigenic sites on H was conserved among morbilliviruses and the MAbs to this site had haemagglutination inhibition activity against measles virus (MV). The remaining sites were specific for RPV and varied antigenically between strains of RPV. The anti-F MAbs lacked neutralizing activity, but two of the five MAbs did show activity in the presence of complement or anti-mouse immunoglobulin. On the whole, the antigenic sites on F were conserved in some strains of MV, but not in canine distemper virus. All of the sites on the surface proteins were sensitive to SDS and, although those on F were not affected by 2-mercaptoethanol, five of the seven sites on H were destroyed by it. These results suggest that the epitopes on the envelope proteins are conformation-dependent.

Received 29 January 1991; accepted 22 April 1991.

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				M. Sugiyama, N. Ito, N. Minamoto, and S. Tanaka Identification of Immunodominant Neutralizing Epitopes on the Hemagglutinin Protein of Rinderpest Virus J. Virol., February 15, 2002; 76(4): 1691 - 1696. [Abstract] [Full Text] [PDF]