Activation of telomerase by HPVs

Area of Science:

• Oncology
• Molecular Biology
• Virology

Background:

• Telomerase is crucial for maintaining chromosome ends and cellular immortality.
• Telomerase activation, specifically human telomerase reverse transcriptase (hTERT), is a hallmark of most HPV-associated cancers.
• High-risk HPV oncoproteins E6 and E7 are consistently implicated in telomerase regulation within these cancers.

Purpose of the Study:

• To review the multifaceted roles of high-risk HPV E6 and E7 in regulating telomerase.
• To elucidate the transcriptional, epigenetic, and post-transcriptional mechanisms involved in hTERT activation by HPV.
• To underscore the significance of telomerase activation as a key oncogenic pathway in HPV-driven cancers.

Main Methods:

• Literature review of seminal studies over the past two decades.
• Analysis of research on HPV E6 and E7 interactions with telomerase regulatory pathways.
• Synthesis of findings regarding transcriptional, epigenetic, and post-transcriptional regulation.

Main Results:

• High-risk HPV E6 and E7 proteins universally activate telomerase in HPV-associated cancers.
• These viral proteins employ diverse mechanisms, including transcriptional, epigenetic, and post-transcriptional alterations, to upregulate hTERT.
• Telomerase activation is a critical step enabling cellular immortalization and driving cancer development.

Conclusions:

• Telomerase activation is a pivotal oncogenic pathway in HPV-associated cancers, driven by HPV E6 and E7.
• Understanding these regulatory mechanisms provides insights into cancer development and potential therapeutic targets.
• Targeting telomerase or its regulators could offer strategies for treating HPV-driven malignancies.