Life sciences · Journal article
Biomedicines · September 11, 2026
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Hepatocellular carcinoma (HCC) is the most common primary liver malignancy and a leading cause of cancer-related mortality worldwide. Despite advances in diagnosis and therapy, the prognosis for advanced HCC remains poor due to late-stage diagnosis, high recurrence rates, therapeutic resistance, and pronounced molecular heterogeneity. HCC development is driven by complex somatic gene alterations, epigenetic reprogramming, dysregulated signaling pathways, metabolic changes, and an immunosuppressive tumor microenvironment. Molecular profiling studies have identified key oncogenic pathways involved in HCC progression, including MAPK/ERK (mitogen-activated protein kinase/extracellular signal-regulated kinase), Wnt/β-catenin, PI3K/AKT/mTOR (Phosphoinositide 3-kinase/Protein Kinase B/mechanistic Target of Rapamycin), Hippo-YAP/TAZ, (Yes-associated protein/transcriptional co-activator with PDZ-binding motif) cell cycle regulators, and p53-mediated tumor suppression. These pathways coordinate critical cellular processes such as proliferation, survival, metabolism, invasion, and genomic stability. Emerging mechanisms, including cancer stem cell plasticity, immune evasion, epigenetic dysregulation, and steroid receptor coactivator (SRC)-dependent transcriptional regulation, further contribute to tumor progression and therapeutic resistance. Additionally, recent bioinformatic analyses suggest a potential role for progesterone-mediated oocyte maturation pathways in HCC, although their functional relevance remains unclear. A thorough understanding of these interconnected mechanisms could lead to novel therapeutic targets and the development of more effective, personalized treatment strategies for HCC. This review discusses key signaling pathways and emerging mechanisms in HCC and their roles in disease development and treatment.