title: Incorporation of nucleic acid and protein precursors in enriched populations of proliferating normal and leukemic cells.
abstract: Nucleic acid and protein synthesis was determined in immature myeloid cells isolated from seven normal bone marrow samples and compared to blasts from nine patients with fullblown acute non-lymphocytic leukemia. Samples obtained from normal bone marrow contained a mean of 82% immature myeloid cells with 29.9% S-phase cells. These cells incorporated [3H]thymidine with a mean of 17,500 counts/min [3H]uridine with a mean of 24,000 counts/min and [3H]leucine with a mean of 2100 counts/min per 0.2 x 10(6) cells. Leukemic bone marrow cells could be separated in fractions with different proliferative activities. Leukemic samples with a mean of 3.6% S-phase cells incorporated [3H]thymidine with a mean of 1100 counts/min, [3H]uridine with a mean of 15,700 counts/min and ]3H]leucine with a mean of 2600 counts/min per 0.2 x 10(6) cells. For leukemic samples with a mean of 30.6% S-phase cells these values were: [3H]thymidine 22,200 counts/min, [3H]uridine 49,700 counts/min and [3H]leucine 6700 counts min per 0.2 x 10(6) cells. The incorporation studies were carried out for the first time in normal and leukemic cells with a comparable proliferative activity. Non-lymphocytic leukemic blastic cells showed a two-fold increase in RNA synthesis and a three-fold increase in protein synthesis compared to enriched samples of normal early myeloid cells with the same proliferative activity.
mesh_terms: D001853:Bone Marrow / Q000378:metabolism*; D002455:Cell Division; D002478:Cells, Cultured; D006801:Humans; D007938:Leukemia / Q000378:metabolism*; D009696:Nucleic Acids / Q000096:biosynthesis*; D014176:Protein Biosynthesis; D012313:RNA / Q000096:biosynthesis
chemical_list: D009696:Nucleic Acids; D012313:RNA