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KMID : 0360319950270061030
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Journal of Korean Cancer Research Association
1995 Volume.27 No. 6 p.1030 ~ p.1039
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Effects of 12-O-Tetradecanoylphorbol-13-Acetate on CD18 and Myeloperoxidase Genes Expression in HL-60 cells
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임규
이종남/권광인/이명선/권기량/윤완희/곽상태/황병두
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Abstract
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The CD18(β-subunit of integrin) is essential for expression of structural and functional CD11/CD18(a/β-subunic) complexes on the cell surface, and myeloperoxidase plays a role in the bacteriocidal action of granulocytes. Effects on CD18 and
myeloperoxidase genes expression have been investigated during TPA-induced differentiation of HL-60 cells. CD18 mRNA was induced at 24 hr and myeloperoxidase mRNA was rapidly reduced at 12 hr. The level of CD18 mRNA was induced and
myeloperoxidase
was
reduced in proportion to concentration of TPA. TPA-induced CD18 mRNA was slightly decreased and myeloperoxidase mRNA was no effect in cells treated with cycloheximide, respectively. On the other hand CD18 mRNA was completely reduced by
actinomycin
D
pretreatment. TPA-dependent stimulation of CD18 gene and repression of myeloperoxidase gene were completely restored by staurosporin pretreatment. These results suggest that phosphorylation of a protein is a crucial step for the induction of CD18
mRNA
and the repression of myeloperoxidase during TPA-induced differentiation of HL-60.
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