Human Papillomavirus Type 16 E6 and E7 Cause Polyploidy in Human Keratinocytes and Up-Regulation of G2-M-phase Proteins

Daksha Patel, A. Incassati, N. Wang, Dennis McCance

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Human papillomavirus type 16 proteins E6 and E7 have been shown to cause centrosome amplification and lagging chromosomes during mitosis. These abnormalities during mitosis can result in missegregation of the chromosomes, leading to chromosomal instability. Genomic instability is thought to be an essential part of the conversion of a normal cell to a cancer cell. We now show that E6 and E7 together cause polyploidy in primary human keratinocytes soon after these genes are introduced into the cells. Polyploidy seems to result from a spindle checkpoint failure arising from abrogation of the normal functions of p53 and retinoblastoma family members by E6 and E7, respectively. In addition, E6 and E7 cause deregulation of cellular genes such as Plk1, Aurora-A, cdk1, and Nek2, which are known to control the G2-M-phase transition and the ordered progression through mitosis.
Original languageEnglish
Pages (from-to)1299-1306
Number of pages8
JournalCancer Research
Volume64(4)
Issue number4
DOIs
Publication statusPublished - 15 Feb 2004

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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