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  • Journal
    Digital Access Springer v. 1-, 1999-
  • Article
    Lange Wantzin G.
    Scand J Haematol. 1979 May;22(5):375-85.
    The presence of DNA polymerase and primer-template DNA in lymphoblast nuclei by measuring the in vitro incorporation of 3H-thymidine-5'-triphosphate (3H-TTP) was studied in 10 patients with acute lymphoblastic leukemia. Protein synthesis and various other cytokinetic parameters were also studied. After prednisone (P) administration a marked decrease in 3H-TTP labelling index (3H-TTP LI) was apparent together with an inhibition of 3H-leucine incorporation (3H-LEU LI) into lymphoblasts. A moderate decrease in 3H-TDR labelling index (3H-TDR LI) and a later decrease in mitotic index (MI) were seen. Single cell DNA measurements showed a depletion of 3H-TDR labelled lymphoblasts in early part of S-phase apparent at 24 h lasting up to 54 h after P administration. Vncristine given as a flash injection later in the study period caused an immediate rise of the MI, at the same time the P induced decline in 3H-TTP LI, 3H-TDR LI and 3H-LEU LI were continued in most patients. P is thought to damage the cells both in and outside the cell cycle. In the cell cycle the effect of P is an arresting effect in G1.
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