ISSN:
0021-9541
Keywords:
Life and Medical Sciences
;
Cell & Developmental Biology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
,
Medicine
Notes:
Four T-cell and two B-cell lines from patients with lymphoblastic leukemia were examined with a panel of monoclonal antibodies for a variety of lineage and differentiation stage-associated antigens during growth in liquid suspension. In five of the lines, markers normally associated with the granulopoietic lineage were found and the level of expression of these markers varied during culture. The sixth line, MOLT-3, was examined in more detail. Using clonal selection it was found that phenotypic heterogeneity could readily be obtained and that subclones could be acquired that expressed a wide range of markers, typically in reproducible kinetic patterns, that were not detected on the parent clone. Previous results were confirmed showing that treatment with the drug 5-azacytidine (5-aza) prior to selection promoted the expression of the granulopoietic lineage associated antigen 80H.5 on MOLT-3 subclones; however, treatment with 5-aza appeared to inhibit substantially the expression of other novel markers by subclones following a second selection compared to untreated controls. It appears that the expression of markers normally associated with other lineages on leukemic lymphoblasts (lineage infidelity) may be characteristic of such lines and that phenotypically variant subclones expressing lineage infidelity can readily be obtained by clonal selection.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jcp.1041270207
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