title: Cytogenetic studies of hairy cell leukemia.
abstract: Mononuclear cells from peripheral blood and spleen of four patients with hairy cell leukemia (HCL) were cultured for 1 to 10 days with and without phytohemagglutinin (PHA) stimulation. Blastogenesis and mitoses were not observed in the unstimulated cells cultured for up to 3 days. Prolonging the culture time of unstimulated cells to 7 days produced blastogenic response; a further increase in culture time to 10 days showed transformed cells but not mitoses. Poor PHA response was noted in the cultures stimulated for 3 days, but cells cultured for 7 days and then stimulated with PHA entered mitosis. Surface immunoglobulins were exhibited in 78-94% of the cells in the blood and spleen of patients. In addition, these cells had tartarate-resistant acid phosphatase and were able to phagocytize latex particles by which properties they were identified as hairy cell leukemia cells. Chromosome abnormalities were present in a proportion of cells of each patient, none of them, however, were clonal.
mesh_terms: D000328:Adult; D000368:Aged; D001773:Blood Cells / Q000032:analysis; D002478:Cells, Cultured; D002869:Chromosome Aberrations; D005260:Female; D006801:Humans; D007943:Leukemia, Hairy Cell / Q000235:genetics* / Q000276:immunology*; D008214:Lymphocytes / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D010835:Phytohemagglutinins / Q000494:pharmacology; D011947:Receptors, Antigen, B-Cell / Q000032:analysis; D013154:Spleen / Q000166:cytology; D013997:Time Factors
chemical_list: D010835:Phytohemagglutinins; D011947:Receptors, Antigen, B-Cell