A variety of cell lines have been prepared by fusion of the @entity19 WEH1 3B cell line with peripheral blood leukocytes from a @entity1 with @entity1860 . Fusion products were selected for their ability to produce a @entity1778 -associated antigen (CAMAL) previously described. One such line which originally produced CAMAL subsequently lost this ability and was used as a negative control. A number of antibodies were conjugated to @entity3838 (HP) and tested for their ability to bind to cell lines as detected by either fluorescence or by their ability to kill cells after light activation. The antibodies used were: rabbit anti-Hu (a conventional rabbit antiserum raised to membrane preparations from normal @entity1 peripheral blood leukocytes which served as a positive control); CAMAL-1 (a monoclonal gamma 1 antibody with specificity for the CAMAL antigen); and L1210 (an irrelevant monoclonal gamma 1 antibody). HP was conjugated to the antibodies by a @entity26408 procedure. When labeled cells were examined by fluorescence microscopy, it was apparent that both the rabbit antibody and CAMAL-1:HP showed positive labeling. The ability of the antibody:HP conjugates to kill labeled cells following light activation was tested. It was shown that rabbit anti-Hu:HP and CAMAL-1:HP conjugates were capable of killing significant numbers of cells when HP concentrations were as low @entity19 ng/10(6) cells, whereas similarly treated cells exposed to either L1210:HP or HP alone did not exhibit significant killing until concentrations reached 240 and 120 ng/10(6) cells, respectively. Further experiments in which other cell lines were tested, all at HP concentrations of 12 ng/10(6) cells, demonstrated that those lines producing CAMAL were killed, whereas negative lines were not.

Ability of specific monoclonal antibodies and conventional antisera conjugated to XXXX to label and kill selected cell lines subsequent to light activation.

@entity1 :: ('9606', 'Species') :: ['human', 'patient'] @entity26408 :: ('CHEBI:53091', 'Chemical') :: ['carbodiimide'] @entity19 :: ('10090', 'Species') :: ['as 1.2', 'murine'] @entity3838 :: ('MESH:D006415', 'Chemical') :: ['hematoporphyrin'] @entity1778 :: ('MESH:D007938', 'Disease') :: ['leukemia'] @entity1860 :: ('MESH:D015464', 'Disease') :: ['chronic granulocytic leukemia']
@entity3838 :: (MESH:D006415,Chemical) :: ['hematoporphyrin']
