Abstract
Although the prognostic and clinical significance of cell cycle kinetic studies in neoplastic diseases has been inconclusive at worst and controversial at best, new advances in techniques to study cell cycle characteristics have dramatically improved our ability to more accurately measure the parameters of labeling index (LI), S-phase time (Ts) and total cell cycle time (Tc), and subsequently to find any correlations which would enable us to use these as prognostic indicators. Data from 285 patients with acute myeloid leukemia (AML) who were given in-vivo infusion of the thymidine analogue bromodeoxyuridine (BrdU) prior to chemotherapy show differences in mean labeling indices derived from bone marrow aspirates versus biopsies-being 9.2% and 22.2% respectively. The Tc and Ts were obtained by double labeling the aspirates with tritiated thymidine in-vitro. In 102 uniformly treated patients with standard risk de novo AML, correlations between cell cycle parameters thus measured and clinical data were sought...
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