Bovine papillomavirus E1 protein affects the host cell cycle phase fractions.

Bovine papillomavirus E1 protein affects the host cell cycle phase fractions.
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牛乳头瘤病毒 E1 蛋白影响宿主细胞周期阶段分数。

DOI:
10.1002/cyto.990160206
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发表时间:
1994
期刊:
Cytometry
影响因子:
--
通讯作者:
Wilson,V
Wilson,V
中科院分区:
--
文献类型:
--
作者:
Belyavskyi,M;Miller,J;Wilson,V

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用牛乳头瘤病毒E1蛋白表达载体电穿孔C127鼠成纤维细胞,并通过流式细胞术进行检查。通过使用抗E1血清和荧光素偶联的第二抗体进行免疫荧光染色,将总细胞群中的E1表达细胞(E1+)与非表达细胞(E1-)区分开来。在第一和第二抗体饱和的条件下,特异性绿色荧光反映了细胞内E1蛋白的水平。用DNA特异性染料碘化丙啶(PI)同时染色,可以确定E1+和E1−细胞群的细胞周期分布。结果发现,与E1−亚群相比,E1+亚群中G1期细胞的百分比减少,G2+M期细胞的百分比增加。在E1+与E1-群体中,总体倍增时间或非周期细胞百分比没有显著差异,表明细胞周期分布的变化不是由于E1对细胞生长的一般激活或抑制。细胞周期时相分数的直接测量证实,在E1表达细胞中,G1期减少,G2+M期增加。由于这些观察是在没有其他病毒蛋白或病毒DNA复制的情况下进行的,因此表明E1蛋白对宿主细胞的作用与其在病毒DNA复制中的直接作用无关。因此,E1可以直接与宿主细胞周期调控机制相互作用。© 1994 Wiley‐利斯公司
C127 murine fibroblast cells were electroporated with a bovine papillomavirus E1 protein expression vector and examined by flow cytometry. E1 expressing cells (E1+) within the total cell population were distinguished from nonexpressing cells (E1−) by immunofluorescent staining with anti‐E1 serum and a fluorescein‐conjugated second antibody. Under conditions of saturation with the first and second antibodies, the specific green fluorescence reflected the level of intracellular E1 protein. Simultaneous staining with a DNA‐specific dye, propidium iodide (PI), enabled the cell cycle distributions for the E1+and E1−cell populations to be determined. It was found that the E1+subpopulation had a reduced percentage of cells in G1 phase and an increased percentage of G2+M phase cells, compared to the E1−subpopulation. There was no significant difference in overall doubling time or percentage of noncycling cells in the E1+vs. E1−populations, indicating that the change in cell cycle distribution was not due to a general activation or inhibition of cell growth by E1. Direct measurement of cell cycle phase fractions confirmed that the G1 phase was decreased and the G2+M phase was increased in E1 expressing cells. As these observations were made in the absence of other viral proteins or viral DNA replication, it suggests that the E1 protein exerts an effect on the host cell independent of its direct role in viral DNA replication. Thus, E1 may interact directly with the host cell cycle regulatory machinery. © 1994 Wiley‐Liss, Inc.
牛乳头瘤病毒 1 型 E1 复制缺陷突变体的转录调控发生改变
DOI: --
发表时间: 1988
影响因子: 5.4
作者:
P. Lambert;P. Howley
通讯作者: P. Howley
牛乳头瘤病毒 E1 相关蛋白与牛乳头瘤病毒 DNA 特异性结合
DOI: --
发表时间: 1991
影响因子: 5.4
作者:
Van G. Wilson;John H. Ludes
通讯作者: John H. Ludes
牛乳头瘤病毒 (BPV) 编码的 E2 蛋白增强 E1 蛋白与 BPV 复制起点的结合。
DOI: 10.1073/pnas.90.7.2865
发表时间: 1993
影响因子: 11.1
作者:
Seo,YS;Müller,F;Lusky,M;Gibbs,E;Kim,HY;Phillips,B;Hurwitz,J
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DOI: 10.1016/0022-5193(72)90157-9
发表时间: 1972-01-01
影响因子: 2
作者:
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通讯作者: KAUFFMAN, SA
DOI: 10.1073/pnas.87.7.2770
发表时间: 1990-04-01
影响因子: 11.1
作者:
FURUKAWA, Y;DECAPRIO, JA;GRIFFIN, JD
通讯作者: GRIFFIN, JD