Treatment of cells with the polyamine analog N1,N11-diethylnorspermine retards S phase progression within one cell cycle

被引:37
作者
Alm, K
Berntsson, PSH
Kramer, DL
Porter, CW
Oredsson, SM
机构
[1] Univ Lund, Dept Anim Physiol, SE-22362 Lund, Sweden
[2] Roswell Pk Canc Inst, Grace Canc Drug Ctr, Buffalo, NY 14263 USA
来源
EUROPEAN JOURNAL OF BIOCHEMISTRY | 2000年 / 267卷 / 13期
关键词
bromodeoxyuridine; cell cycle; polyamines; polyamine analog; S phase;
D O I
10.1046/j.1432-1327.2000.01460.x
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
When Chinese hamster ovary cells were seeded in the presence of the spermine analog N-1,N-11-diethylnorspermine (DENSPM), cell proliferation ceased; this was clearly apparent by cell counting 2 days after seeding the cells. However, 1 day after seeding there was a slight difference in cell number between control and DENSPM-treated cultures. To investigate the reason for this easily surpassed slight difference, we used a sensitive bromodeoxyuridine/flow cytometry method. Cell cycle kinetics were studied during the first cell cycle after seeding cells in the absence or presence of DENSPM. Our results show that DENSPM treatment did not affect the progression of the cells through G(1) or the first G(1)/S transition that took place after seeding the cells. The first cell cycle effect was a delay in S phase as shown by an increase in the DNA synthesis time. The following G(2)/M transition was not affected by DENSPM treatment. DENSPM treatment inhibited the transient increases in putrescine, spermidine, and spermine pools that took place within 24 h after seeding. Thus, in conclusion, the first cell cycle phase affected by the inhibition of polyamine biosynthesis caused by DENSPM was the S phase. Prolongation of the other cell cycle phases occurred at later time points, and the G(1) phase was affected before the G(2)/M phase.
引用
收藏
页码:4157 / 4164
页数:8
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