Phenotypic characterization of canine lymphoma, using monoclonal antibodies and a microlymphocytotoxicity assay
1988
Ladiges, W.C. | Keast, M. | Appelbaum, F. | Storb, R.
Cells acquired from lymph node biospy specimens obtained from 58 dogs scheduled to undergo chemotherapy for lymphoma were immunophenotyped, using a microlymphocytotoxicity (MLCT) assay comprising a panel of well-characterized monoclonal antibodies (MAB) specific for canine cell surface antigens. Cells from 54 of the dogs concurrently were tested cytofluorometrically, using surface immunoglobulin (SIg) as a marker for B cells and the MAB DT2 specific for peripheral blood T cells. The MLCT results indicated frequent coexpression of antigens identified by DT2 antibody and, to a lesser extent, by 1A1 antibody on SIg-positive cells, suggesting that these antigens may be associated with other types of less-differentiated lymphoid cells, in addition to being associated with mature T cells. Class-II major histocompatibility antigens, as recognized by MAB H81.98.71, HB10a, and H40.315.7, were detected on most SIg-positive cells, but generally were lacking on SIg-negative, DT2-negative cells. The MAB Wig4, reactive with canine monocytes, recognized relatively few cells (11 of 58). Response to chemotherapy was not correlated with reactivity to MAB DLy6 specific for resting lymphocytes or to MAB W3G10 specific for a polymorphic antigen associated with the canine major histocompatibility complex. The MLCT assay appears to be efficient, rapid, and inexpensive for immunophenotyping cells from lymphoma biopsy specimens.
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