The Role of microRNA Expression and DNA Methylation in HPV-Related Cervical Cancer: A Systematic Review.

Human papillomavirus (HPV) infection is a major etiologic factor in cervical cancer, a major cause of cancer-related morbidity and mortality among women worldwide. The role of microRNA (miRNA) dysregulation in cervical carcinogenesis is still largely unknown, but epigenetic changes, including DNA methylation and miRNA regulation, are crucial factors. The integration of HPV DNA into the host genome can lead to alterations in DNA methylation patterns and miRNA expression, contributing to the progression from normal epithelium to cervical intraepithelial neoplasia and, ultimately, to cervical cancer. This review aimed to examine the relationship between epigenetic changes in the development and progression of HPV associated with cervical cancer. A systematic literature search was conducted in major databases using predefined inclusion and exclusion criteria. Studies that investigated the expression, function, and clinical significance of miRNAs, DNA methylation, and the expression of oncoproteins in HPV-related cervical cancer were included. Data extraction, quality assessment, and synthesis were performed to provide a comprehensive overview of the current state of knowledge. We provide an overview of the studies investigating miRNA expression in relation to cervical cancer progression, highlighting their common outcomes and their weaknesses/strengths. To achieve this, we systematically searched the Pubmed database for all articles published between January 2018 and December 2023. Our systematic review revealed a substantial body of evidence supporting the pivotal role of miRNA dysregulation in the pathogenesis of HPV-related cervical cancer and related oncoproteins. From the 28 studies retrieved, miR-124, FAM194/miR-124-2, and DNA methylation are the most frequently down- or up-regulated in CC progression. Notably, FAM194/miR-124-2 and DNA methylation emerged as a promising molecular marker for distinguishing between cases requiring immediate surgical intervention and those amenable to a more conservative wait-and-see approach. This systematic review underscores the critical involvement of microRNA in the context of HPV-related cervical cancer and sheds light on the potential clinical utility of FAM194/miR-124-2 and DNA methylation as a discriminatory tool for guiding treatment decisions. The identification of patients who may benefit from early surgical intervention versus those suitable for observation has important implications for personalized and targeted management strategies in the era of precision medicine.