title: Cell membrane enzymes. II. Alkaline phosphatase and alkaline phosphodiesterase I in normal and leukaemic lymphocytes.
abstract: The distribution of two cell membrane enzymes, alkaline phosphatase and alkaline phosphodiesterase I has been studied in normal and leukaemic lymphocytes. No reduction in the level of activity of either enzyme was found in the chronic or acute B- and T-cell leukaemias. Alkaline phosphatase activity was elevated in the lymphocytes from T-CLL, cord blood and tonsils and the blast cells from Null-ALL. Alkaline phosphodiesterase was elevated in lymphocytes from cord blood and tonsils and the blast cells from Null-ALL. As findings in Null-ALL were based on only two cases, they need confirmation in a larger series. The significance of these results is discussed in relation to current theories of maturation and differentiation in the lymphoproliferative disorders.
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism*; D002462:Cell Membrane / Q000201:enzymology*; D005312:Fetal Blood / Q000201:enzymology; D006801:Humans; D007938:Leukemia / Q000201:enzymology*; D008214:Lymphocytes / Q000201:enzymology*; D009503:Neutropenia / Q000201:enzymology; D014066:Palatine Tonsil / Q000201:enzymology; D010727:Phosphoric Diester Hydrolases / Q000378:metabolism*
chemical_list: D000469:Alkaline Phosphatase; D010727:Phosphoric Diester Hydrolases