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Application of Long-term cultured Interferon-γ Enzyme-linked Immunospot Assay for Assessing Effector and Memory T Cell Responses in Cattle
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Epitopes of the T19 lymphocyte surface antigen are extensively conserved in ruminants

W R Hein1, L Dudler, M F Beya

  • 1Basel Institute for Immunology, Switzerland.

Veterinary Immunology and Immunopathology
|January 1, 1991
PubMed

The reactivity of five monoclonal antibodies (mAbs SBU-T19, 197, IL-A29, CC-15 and CC-39) specific for the T19 molecule on sheep and cattle CD4-CD8- T cells was compared. MAbs SBU-T19 and 197 were shown to recognise separate epitopes on T19. All mAbs reacted with lymphocytes from several different ruminant species and the tissue distribution and frequency of positive cells was similar in each case. None of the mAbs reacted with horse, pig or camel lymphocytes. The extensive conservation of T19 epitopes in ruminants during the mammalian radiation could indicate an important role for this molecule in the ruminant immune system.

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