Non-coding RNAs and liquid biopsies: Emerging biomarkers for cervical cancer.

Cervical cancer (CC) is the fourth most common malignancy among women worldwide, highlighting the urgent need for improved predictive, diagnostic and prognostic biomarkers to enhance disease management and patient outcomes. Non-coding RNAs (ncRNAs), including long non-coding RNAs (lncRNAs), circular RNAs (circRNAs) and microRNAs (miRNAs), perform various functions in transcriptional, translational and post-translational regulation. Aberrant expression of ncRNAs in CC has been closely associated with disease initiation and progression, underscoring their potential as key regulators of cervical tumorigenesis. Several lncRNAs, such as HOTAIR and PVT1, contribute to cervical tumorigenesis by promoting cell proliferation, migration and invasion. Likewise, circRNAs, such as circ_0018289, act as miRNA sponges, leading to the dysregulation of key target genes. Moreover, specific miRNAs, such as miR-20a and miR-21, promote CC progression (oncogenic miRNAs), whereas others, including miR-214 and miR-218, exhibit a tumor suppressor role. Importantly, many ncRNAs are detectable in body fluids, representing stable and minimally invasive biomarkers suitable for liquid biopsy. Thus, in this comprehensive narrative review, we map the range of candidate ncRNAs reported in the literature and discuss their predictive, diagnostic, prognostic and therapeutic value, including their potential as circulating biomarkers in CC. We also highlight, as a future perspective, how integrated profiling approaches could guide research and support the development of non-invasive strategies for diagnosis, prognostic assessment, and therapy monitoring in CC.