The participation of antibody in spontaneous and ...

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Title The participation of antibody in spontaneous and antibody-dependent cell-mediated cytotoxicity in the pig
Author(s) Arnost Cepica, J. B. Derbyshire
Journal Journal of Comparative Pathology
Date 1987
Volume 97
Issue 6
Start page 709
End page 713
Abstract Treatment of porcine lymphocytes with trypsin reduced their spontaneous cell-mediated cytotoxicity (SCMC) activity against target cells persistently infected with transmissible gastroenteritis virus (PK15-TGE cells), but had no effect on antibody-dependent cell-mediated cytotoxicity (ADCC). SCMC activity was partially restored to trypsin-treated lymphocytes by incubation in RPMI-1640 medium or in medium containing F(ab')2 fragments of rabbit anti-porcine immunoglobulin, but not by brief incubation in autologous serum. F(ab')2 fragments of anti-porcine immunoglobulin did not block the SCMC reaction, but ADCC was greatly reduced by this reagent. Thus SCMC and ADCC mediated by porcine lymphocytes against PK15-TGE target cells clearly involved two distinct mechanisms in terms of antibody participation and sensitivity to trypsin.

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