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Related Concept Videos

Initiation of Translation02:33

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Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
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Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
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RNAscope for In situ Detection of Transcriptionally Active Human Papillomavirus in Head and Neck Squamous Cell Carcinoma
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HPV16 E6 upregulates Aurora A expression.

Yi Guo1, Jiaming Ma2, Yahong Zheng1

  • 1Department of Gynecology, First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China.

Oncology Letters
|July 23, 2016
PubMed
Summary
This summary is machine-generated.

Human papillomavirus (HPV) 16 E6 protein interacts with Aurora A kinase, stabilizing its expression. This interaction inhibits apoptosis, contributing to cancer development and highlighting Aurora A as a potential target for oncogenic viruses.

Keywords:
Aurora AE6gene regulationhuman papillomavirus

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Area of Science:

  • Oncology
  • Virology
  • Molecular Biology

Background:

  • Aurora A kinase overexpression is linked to cancer, causing chromosome instability and p53 degradation.
  • High-risk human papillomavirus (HPV) 16 E6 oncoprotein drives cell immortalization and transformation.
  • HPV16 E6 interacts with cellular factors to promote tumorigenesis.

Purpose of the Study:

  • To investigate the interaction between HPV16 E6 and Aurora A kinase.
  • To elucidate the mechanism by which HPV16 E6 influences Aurora A expression and cell apoptosis.
  • To identify a novel mechanism for HPV16 E6 in carcinogenesis.

Main Methods:

  • Co-immunoprecipitation and glutathione S-transferase pull-down assays to confirm binding.
  • Immunostaining to visualize protein localization.
  • Western blotting and reverse transcription-polymerase chain reaction to assess protein and gene expression levels.

Main Results:

  • HPV16 E6 and Aurora A were shown to bind physically both in vivo and in vitro.
  • HPV16 E6 binding led to the stabilization of Aurora A expression.
  • Stabilization of Aurora A by HPV16 E6 inhibited cell apoptosis, suggesting a role in carcinogenesis.

Conclusions:

  • HPV16 E6 directly interacts with and stabilizes Aurora A kinase.
  • This stabilization mechanism contributes to HPV-mediated carcinogenesis by inhibiting apoptosis.
  • Aurora A kinase may represent a common target for oncogenic viruses involved in cellular carcinogenesis.