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[T cell differentiation model based on the expression of T cell receptor chains and genes--study in the human leukemia/lymphoma cell lines].

A total of 33 human leukemia/lymphoma cell lines were classified into 4 groups with respect to the pattern of cell membrane (sm) expression of the CD3 and T cell receptor (TCR) molecules; (i) smCD3+TCR alpha beta (16 cell lines), (ii) smCD3+TCR beta delta (1 cell line), (iii) smCD3+TCR gamma delta (3 cell lines) amd (iv) smCD3-TCR- (13 cell lines), respectively. Using monoclonal antibodies (MoAbs) specific to CD3 (NU-T3), TCR alpha chain (alpha F1), TCR beta chain (beta F1), and TCR gamma chain (C gamma M1), respectively, cytoplasmic (cy) expression of these molecules was determined by immunofluorescence test. Expression of cyCD3 was present in all cell lines regardless of groups. In group (i), all 16 cell lines expressed both TCR alpha and beta chains. While only TCR beta chain was expressed in group (ii), TCR gamma chain was expressed in all 3 cell lines of group (iii). One (PEER) of the three in group (iii) expressed TCR beta chain as well. In group (iv), we found 8 cell lines with cyTCR alpha expression, 11 cell lines with cyTCR beta expression, and 10 cell lines with cyTCR gamma expression, respectively. For TCR genes, except 1 cell line all cell lines were found to present rearranged C beta gene and its mRNA, including all 3 TCR gamma/delta cell lines of group (iii). One of the TCR alpha beta cell lines exhibited rearranged C delta and J delta genes as well as its mRNA. Two cell lines of the 13 CD3-TCR- of group (iv) exhibited rearranged C delta and J delta and its mRNA. An NK-like activity and IL-2 production were induced in the TCR beta delta and gamma delta cell lines [group (ii) and (iii)] by treatment with PHA and PMA.