HPV42: From a Low-Risk Genotype to a Potentially Oncogenic Virus

Area of Science:

• Oncology
• Virology
• Dermatology

Background:

• Human papillomavirus 42 (HPV42) was traditionally classified as low-risk (LR), associated with benign lesions like anogenital warts.
• Emerging evidence reveals HPV42's significant oncogenic potential, challenging its prior classification.

Purpose of the Study:

• To review the clinicopathological features, oncogenic mechanisms, and epidemiological characteristics of HPV42-associated diseases.
• To discuss the diagnostic implications and the need for reclassifying HPV42's risk.
• To highlight the importance of understanding HPV42's pathogenic spectrum for clinical management.

Main Methods:

• Literature review synthesizing current evidence on HPV42.
• Analysis of clinicopathological data, molecular mechanisms, and epidemiological studies.
• Comparative analysis of HPV42's molecular hallmarks with high-risk (HR) HPV genotypes.

Main Results:

• HPV42 is implicated in digital papillary adenocarcinoma (DPA), high-grade squamous intraepithelial lesions (HSIL) of the cervix and anus, and oropharyngeal infections.
• Molecular pathways in HPV42-induced carcinogenesis show similarities to high-risk HPV types.
• Genomic integration and interaction with tumor suppressor pathways are key features of HPV42 oncogenesis.

Conclusions:

• HPV42 exhibits a broader pathogenic spectrum than previously recognized, including aggressive tumors.
• Re-evaluation of HPV42's risk classification is warranted.
• Comprehensive understanding of HPV42 is crucial for improved diagnosis, prevention, and treatment strategies.