Characterization of a monoclonal antibody identifying a CD45RA antigen on feline leukocytes

Nazareth Gengozian, James S. Foster, Daniel Kestler

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The antibody produced by a murine hybridoma obtained from the fusion of SP2/0 plasmacytoma cells with splenocytes of a mouse immunized with feline bone marrow was found to react with 60% of bone marrow cells and 80% of peripheral blood leukocytes (PBL); reactivity in the latter tissue was restricted almost entirely to mononuclear cells. Two-color FACScan analyses of this antibody with mAbs specific for feline lymphocytes revealed positive and negative populations of CD4 and CD8 cells. The reactivity for CD4 and CD8 cells was animal age dependent, binding to a higher percentage of the cells in young (2-9 months) versus older animals (>4 years). In a mitogen driven assay for IgG production by PBL the addition of this antibody to the cultures enhanced the suppressor activity of CD8 cells, a function attributed to activation of a CD4 suppressor-inducer population; removal of CD8 cells negated any induction of suppression. Mild papain digestion of bone marrow and PBL completely removed the antigen detected by this antibody while not affecting reactivity of a pan-T antibody. Western blot analysis showed binding of the antibody to polypeptides of approximately 200 kDa on feline bone marrow and PBL. The data suggest that this mAb is identifying the feline homologue of the leukocyte common antigen of cells with a functional specificity characteristic of a CD45RA isoform.

Original languageEnglish (US)
Pages (from-to)253-264
Number of pages12
JournalVeterinary Immunology and Immunopathology
Volume108
Issue number3-4
DOIs
StatePublished - Dec 15 2005

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CD45 Antigens
Felidae
leukocytes
monoclonal antibodies
Leukocytes
Monoclonal Antibodies
cats
antigens
antibodies
Antibodies
cells
bone marrow
Bone Marrow
blood
plasmacytoma
Plasmacytoma
Papain
hybridomas
papain
bone marrow cells

All Science Journal Classification (ASJC) codes

  • Immunology
  • veterinary(all)

Cite this

Characterization of a monoclonal antibody identifying a CD45RA antigen on feline leukocytes. / Gengozian, Nazareth; Foster, James S.; Kestler, Daniel.

In: Veterinary Immunology and Immunopathology, Vol. 108, No. 3-4, 15.12.2005, p. 253-264.

Research output: Contribution to journalArticle

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