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  • Title: Antibody mediated suppression of secondary IgM response in nude mice against vesicular stomatitis virus.
    Author: Charan S, Zinkernagel RM.
    Journal: J Immunol; 1986 Apr 15; 136(8):3057-61. PubMed ID: 3007610.
    Abstract:
    Nude mice immunized with either of the two serotypes of vesicular stomatitis virus (VSV), VSV Indiana (VSV-Ind) or VSV-New Jersey (VSV-NJ), showed an early T cell independent immunoglobulin (Ig) M antibody response comparable with normal euthymic mice. Unlike euthymic mice, however, nude mice reinjected with the homologous serotype were unable to mount a second measurable serum neutralizing (SN) antibody response; a second injection with the heterologous serotype induced a normal primary type of SN antibody response. The serotype-specific refractoriness to a second challenge recovered at about 10 wk after primary infection. When antibody responses were assayed by enzyme-linked immunoabsorbent assay (ELISA), suppressive effects by previous immunization could be observed even after challenge with the heterologous serotypes; this finding probably reflects the known existence of common nonneutralizing determinants shared between the two serotypes. A weak 2-mercaptoethanol (2-ME)-resistant anti-VSV IgG SN antibody response was noticed during the primary response in nude mice and was also found in ELISA; after second infections, this 2-ME-resistant response did not develop. Serum transfer studies in nude and +/+ mice confirmed that the serotype-specific transitory refractoriness of a second response in nude mice was mediated through the anti-VSV-specific IgM antibodies.
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