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影响因子: 1.841 5年影响因子: 1.927 SJR: 0.649 SNIP: 0.516 CiteScore™: 1.96

ISSN 打印: 1045-4403
ISSN 在线: 2162-6502

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DOI: 10.1615/CritRevEukaryotGeneExpr.v14.i3.30
20 pages

Regulation of Cell Cycle Progression and Apoptosis by the Papillomavirus E6 Oncogene

Xueli Fan
Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, Worcester, MA 01605-2324
Jason J. Chen
Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, Worcester, MA 01605-2324

ABSTRACT

Infection with human papillomaviruses (HPV) is strongly associated with the development of cervical cancer. The HPV E6 gene is essential for the oncogenic potential of HPV. E6 abrogates multiple cell cycle checkpoints and modulates apoptosis. Loss of cell cycle checkpoints contributes to genomic instability, a hallmark of cancer cells. Cancer cells also show reduced propensity for apoptotic cell death. Inactivation of the tumor suppressor p53 by E6 is an important mechanism by which E6 promotes cell growth. The molecular basis for apoptosis modulation by E6 is poorly understood. Although it is expected that inactivation of p53 by E6 should lead to a reduction in cellular apoptosis, numerous studies showed that E6 could in fact sensitize cells to apoptosis. In this article, we present an overview of observations and current understanding of the molecular basis for E6-induced cell proliferation and apoptosis.


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