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- Document 0727
- DOCN M9620727
- TI The restricted IgG1 antibody response to maedi visna virus is seen
- following infection but not following immunization with recombinant gag
- protein.
- DT 9602
- AU Bird P; Reyburn HT; Blacklaws BA; Allen D; Nettleton P; Yirrell DL; Watt
- N; Sargan D; McConnell I; Department of Veterinary Pathology, University
- of Edinburgh, UK.
- SO Clin Exp Immunol. 1995 Nov;102(2):274-80. Unique Identifier : AIDSLINE
- MED/96069875
- AB Maedi-visna (MVV) is a retrovirus of the subfamily lentivirinae which
- includes HIV, simian immunodeficiency virus (SIV) and feline
- immunodeficiency virus (FIV). Infection of its natural host, the sheep,
- does not cause overt immunodeficiency, but rather a chronic inflammatory
- disease. However, subtle immunological changes following infection have
- been reported including a sheep IgG1 subclass-restricted
- MVV-neutralizing antibody. Here we demonstrate by Western blotting that
- there is no IgG2 serum antibody response to any MVV antigen after MVV
- infection, in contrast to infection with the parapox virus Orf, when
- serum IgG2 anti-Orf antibody is readily detected. By ELISA, the IgG1
- antibody titres to Orf are higher than to MVV, but the minimum MVV serum
- antibody IgG1/IgG2 ratio is significantly raised compared with that for
- Orf virus antibody in the same sheep, indicating that the IgG2 defect in
- MVV infection cannot be accounted for by differences in the sensitivity
- of the Orf and MVV ELISA. Serum IgG2 anti-MVV gag p. 25 can be detected
- in both normal and MVV-infected sheep following immunization with
- purified recombinant MVV gag p 25 protein in Freund's complete adjuvant.
- The failure to make an IgG2 MVV-specific antibody indicates that
- immunological dysfunction can arise with macrophage tropic lentiviruses,
- and it may aid viral persistence.
- DE Animal Antibodies, Viral/*BIOSYNTHESIS Antigens, Viral/IMMUNOLOGY
- Gene Products, gag/*IMMUNOLOGY IgG/*BIOSYNTHESIS Immunization
- Immunoglobulin Isotypes/IMMUNOLOGY Orf Virus/IMMUNOLOGY Recombinant
- Proteins/IMMUNOLOGY Sheep Sheep Diseases/IMMUNOLOGY Support, Non-U.S.
- Gov't Time Factors Visna/*IMMUNOLOGY Visna-Maedi Virus/*IMMUNOLOGY
- JOURNAL ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
-
-