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Biochem Biophys Res Commun. 1995 Sep 25;214(3):771-80.

Activation of cyclin E-dependent kinase by DNA-damage signals during apoptosis.

Author information

1
Department of Pharmacology, University of Pittsburgh School of Medicine, PA, USA.

Abstract

Preexposure of HL-60 cells to a DNA-damaging agent, cytosine arabinoside (Ara-C), dramatically induced the levels of H1 kinase activities associated with cyclin E (CycE-H1K) but not cyclin A. This induction was cell cycle-independent and accompanied by loss of cell viability, a late event in apoptosis. When an Ara-C-resistant variant of HL-60 cells were treated with Ara-C at a low concentration, neither CycE-H1K nor apoptosis were observed. Both events were induced in the resistant cells but only after treatment with Ara-C at a much higher concentration for a longer period. The DNA-damage-induced CycE-H1K is proposed to be involved in a late apoptosis checkpoint.

PMID:
7575543
DOI:
10.1006/bbrc.1995.2353
[Indexed for MEDLINE]

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