Abstract：
:A human acute lymphoblastic leukemia (ALL) cell line, BALM-9, was established from the peripheral blood specimen of a immunoglobin (lg) phenotype, the established BALM-9 cell line expressed both kappa and lambda light (L) chains simultaneously in a range of 30-80%. Two-color flow cytometric analysis demonstrated that there was a distinct population of kappa lambda double positive cells as well as kappa single, lambda single, and double negative populations. Therefore, subclones were obtained from each population by limiting dilution and were designated BALM-9KL (kappa+lambda+), BALM-9K (kappa+lambda-), BALM 9N (kappa-lambda-). Western blotting confirmed the results of the immunofluorescence test at the protein level. In BALM-9N, L chains were absent even in the cytoplasm as demonstrated by Western blotting. Evidence that the subclones have the same ancestry was provided both by cytogenetic analysis and by Southern blotting, which revealed the 14q32 chromosomal rearrangement as a common abnormality and the same IgH gene arrangement among the subclones. The existence of a kappa lambda positive B cell population suggests a transient stage of normal B cell maturation. These subclones might represent such a stage and thus provide a useful means of analyzing the mechanism of this double light chain expression.
journal_name
Leukemiajournal_title
Leukemiaauthors
Matsuo Y,Nakamura S,Ariyasu T,Terao R,Imajyo K,Tsubota T,Kuwahara K,Sakaguchi Nsubject
Has Abstractpub_date
1996-04-01 00:00:00pages
700-6issue
4eissn
0887-6924issn
1476-5551journal_volume
10pub_type
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