Alterations in polyamine levels induced by phorbol diesters and other agents that promote differentiation in human promyelocytic leukemia cells
Polyamine levels were evaluated in human HL-60 promyelocytic leukemia cells after treatment with inducers of terminal differentiation. Differentiation in these cells was determined by increases in the percentage of morphologically mature cells and in lysozyme activity. Treatment of the HL-60 cells with phorbol 12-myristate-13-acetate (PMA), phorbol 12,13-didecanoate or other inducers of terminal differentiation such as dimethylsulfoxide and retinoic acid resulted in increased levels of putrescine. However, no increase in putrescine could be detected after PMA treatment of a HL-60 cell variant that exhibited a decreased susceptibility to PMA-induced terminal differentiation. Similarly, no increase in putrescine was observed with two nontumor-promoters (phorbol 12,13-diacetate and 4-O-methyl-PMA) or with anthralin, a non-phorbol tumor promoter. In addition to enhancing putrescine levels, PMA also increased the amount of spermidine and decreased the amount of spermine. The increase in putrescine and spermidine preceded the expression of the various differentiation markers. Unlike the changes observed in the polyamine levels after PMA treatment, the activities of ornithine and S-adenosylmethionine decarboxylases, which are polyamine biosynthetic enzymes, did not significantly change. ..cap alpha..-Methylornithine and ..cap alpha..-difluoromethylornithine and methylglyoxal bis(guanylhydrazone), which are inhibitors of the polyamine biosynthetic enzymes, did not affect differentiation in control or PMA-treated cells. Because of these observations, we suggest that the change in polyamine levels involve biochemical pathways other than the known biosynthetic ones. By-products of these pathways may perhaps be the controlling factors involved in the induction of terminal differentiation in the HL-60 and other cell types as well.
- Research Organization:
- Oak Ridge National Lab., TN
- OSTI ID:
- 6357294
- Journal Information:
- Proc. Natl. Acad. Sci. U.S.A.; (United States), Journal Name: Proc. Natl. Acad. Sci. U.S.A.; (United States) Vol. 78:2; ISSN PNASA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
550300 -- Cytology
59 BASIC BIOLOGICAL SCIENCES
AMINES
AMINO ACIDS
ANIMAL CELLS
ANIMALS
BIOLOGICAL EFFECTS
BIOLOGICAL PATHWAYS
CARBOXYLIC ACIDS
CELL CULTURES
CELL DIFFERENTIATION
DATA
DISEASES
DMSO
ESTERS
EXPERIMENTAL DATA
GROWTH
HEMIC DISEASES
INFORMATION
LEUKEMIA
MAMMALS
MAN
NEOPLASMS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
ORNITHINE
PRIMATES
PROMOTERS
PUTRESCINE
SPERMIDINE
SULFOXIDES
TUMOR PROMOTERS
VERTEBRATES