Up-regulation of human deoxyribonuclease II gene expression during myelomonocytic differentiation of HL-60 and THP-1 cells

被引:15
作者
Chou, SF
Chen, HL
Lu, SC [1 ]
机构
[1] Natl Taiwan Univ, Coll Med, Dept Biochem & Mol Biol, Taipei 10018, Taiwan
[2] Natl Taiwan Univ Hosp, Hepatitis Res Ctr, Taipei, Taiwan
关键词
DNase II; HL-60; THP-1; macrophage; PMA;
D O I
10.1016/S0006-291X(02)00835-5
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Several recent studies have suggested that intracellular deoxyribonuclease II (DNase II) is responsible for the degradation of DNA from apoptotic cells that are engulfed by macrophages. In this study, we studied DNase II expression during the phorbol 12-myristate-13-acetate (PMA)-induced differentiation of HL-60 and THP-1 cells. Basal levels of DNase II mRNA and protein were low, with expression being up-regulated approximately 15- and 7-fold, respectively, in HL-60 and THP-1 cells 72h after PMA treatment. Nuclear run-on and luciferase reporter assays showed that transcription of DNase II gene was increased in PMA-treated cells. Together, these results demonstrate that DNase II gene transcription is increased during myelomonocytic differentiation, resulting in increased levels of mRNA and protein. This increase in DNase II levels in differentiated HL-60 and THP-1 cells suggests that it may play an important role in macrophages. (C) 2002 Elsevier Science (USA). All rights reserved.
引用
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页码:48 / 53
页数:6
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