title: Expression of immunoglobulin lambda light chain by the promyelocytic cell line HL-60.
abstract: The HL-60 cell line, established from a patient with acute promyelocytic leukemia, can be induced to undergo differentiation along the granulocyte or monocyte/macrophage line, depending on the particular inducer that is used. In this communication we provide evidence that HL-60 cells also have B lymphoid characteristics because by flow cytometry and clonal excess calculations, these cells are found to express immunoglobulin (Ig) lambda light chains on their surface. Furthermore, HL-60 cells contain poly(A)+ RNA that hybridizes with a DNA fragment encoding the constant region of Ig lambda chains and comigrates with lambda mRNA on RNA blots. Treatment of HL-60 cells with a phorbol ester that induces monocyte/macrophage differentiation resulted in the loss of surface Ig lambda chains and lambda RNA.
mesh_terms: D000912:Antibodies, Neoplasm / Q000096:biosynthesis*; D001402:B-Lymphocytes / Q000276:immunology; D002454:Cell Differentiation / Q000187:drug effects; D002460:Cell Line; D005786:Gene Expression Regulation / Q000187:drug effects; D006801:Humans; D007147:Immunoglobulin Light Chains / Q000096:biosynthesis*; D015470:Leukemia, Myeloid, Acute / Q000276:immunology* / Q000473:pathology; D008297:Male; D011061:Poly A / Q000096:biosynthesis; D012333:RNA, Messenger / Q000096:biosynthesis; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D000912:Antibodies, Neoplasm; D007147:Immunoglobulin Light Chains; D012333:RNA, Messenger; D011061:Poly A; D013755:Tetradecanoylphorbol Acetate