The Role of E6 Spliced Isoforms (E6*) in Human Papillomavirus-Induced Carcinogenesis

Area of Science:

• Oncology
• Virology
• Molecular Biology

Background:

• Persistent infections with High Risk Human Papillomaviruses (HR-HPVs) are the primary cause of cervical cancer.
• HR-HPV E6 and E7 oncoproteins are crucial in cancer development, originating from a polycistronic pre-mRNA.
• Alternative splicing of this pre-mRNA generates various E6 spliced transcripts, known as E6*.

Purpose of the Study:

• To review the regulatory mechanisms of E6 splicing in HR-HPVs.
• To explore the diverse functions attributed to E6* proteins.
• To investigate the potential involvement of E6* proteins in the progression of HPV-induced carcinogenesis.

Main Methods:

• Literature review of studies on HR-HPV E6 splicing.
• Analysis of research on E6* protein functions.
• Examination of evidence linking E6* expression patterns to cancer development.

Main Results:

• Different E6/E6* transcriptional patterns are observed in pre-malignant lesions and HPV-related cancers.
• The precise association of these patterns with cancer development remains unclear.
• There is ongoing debate regarding the specific role of E6* proteins in cancer progression.

Conclusions:

• Understanding E6 splicing regulation is key to comprehending HPV carcinogenesis.
• Further research is needed to clarify the functional significance of E6* proteins.
• Elucidating the role of E6* in HPV-induced cancers may reveal new therapeutic targets.