Beta Human Papillomavirus and Associated Diseases.

Area of Science:

• Dermatology
• Oncology
• Virology

Background:

• Cutaneous human papillomaviruses (HPVs), primarily from the beta- and gamma-genera, are widespread on human skin and may be commensal flora.
• Associations between beta-HPVs and cutaneous squamous cell carcinoma (cSCC) are noted in specific conditions like Epidermodysplasia verruciformis and in immunosuppressed individuals.

Purpose of the Study:

• To investigate the role of beta-HPVs as co-carcinogens in the development of cutaneous squamous cell carcinoma (cSCC).
• To explore the mechanisms by which beta-HPVs may facilitate skin carcinogenesis, particularly in conjunction with ultraviolet radiation (UVR).

Main Methods:

• Review of epidemiological studies on beta-HPV biomarkers and cSCC in immunocompetent individuals.
• Analysis of in vivo and in vitro experimental data on the transforming activities of beta-HPV E6 and E7 proteins.

Main Results:

• Beta-HPVs are implicated as co-carcinogens in cSCC, potentially facilitating UVR-induced DNA mutations in early carcinogenesis stages.
• Evidence suggests specific beta-HPV E6 and E7 proteins possess transforming activities, collaborating with environmental factors in carcinogenesis.

Conclusions:

• Beta-HPVs are significant co-factors in skin cancer development, working alongside UVR and other environmental factors.
• Further research is essential to fully elucidate the pathological roles of ubiquitous cutaneous beta-HPVs.