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Infection and Immunity logoLink to Infection and Immunity
. 1984 Apr;44(1):117–123. doi: 10.1128/iai.44.1.117-123.1984

Antigenic analysis of Japanese encephalitis virus by using monoclonal antibodies.

Y Kobayashi, H Hasegawa, T Oyama, T Tamai, T Kusaba
PMCID: PMC263479  PMID: 6200438

Abstract

Hybridoma cells were produced by fusing P3X63Ag8.653 mouse myeloma cells with spleen cells from BALB/c mice immunized with Japanese encephalitis (JE) virus, Nakayama-RFVL strain. The resulting 26 clones produced hemagglutination inhibition antibodies against the homologous strain. The hemagglutination inhibition reactivity of each clone was tested against six flaviviruses: JE, Murray Valley encephalitis (MVE), Egypt 101 strain of West Nile (WN), St. Louis encephalitis (SLE), Russian spring summer encephalitis, and dengue type 1. The 26 monoclonal antibodies fell into four groups: 14 JE species-specific antibodies, 6 antibodies reactive to JE and MVE viruses, 3 antibodies to three or four viruses in the JE-MVE-WN-SLE subgroup, and 3 antibodies to all six flaviviruses. Furthermore, antigenic comparison of 27 strains of JE virus was carried out by using five JE species-specific monoclonal antibodies. Of these, 24 strains were isolated in various parts of Japan, and 3 strains came from Southeast Asia. In reactivity, the 27 strains were classified into at least four antigenic groups. The results showed that the Nakayama-Yakken strain is a mutant strain which lacks the Nakayama strain-specific antigen and that the recently isolated strains are immunologically different from Nakayama and JaGAr 01 strains. One clone (NARMA 13) produced a JE species-specific antibody which showed almost the same titer against 26 JE virus strains, whereas one clone (NARMA 5) produced a Nakayama strain-specific antibody which reacted only to the Nakayama-RFVL and Nakayama-Yoken strains.

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Selected References

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