Cinobufagin as a Potential Intervention Against Liver Cancer—A Comprehensive Review

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Abstract
Liver cancer remains a significant global health challenge, with hepatocellular carcinoma (HCC) being the most prevalent form. Despite advancements in treatment, high recurrence rates and the limited efficacy of conventional therapies highlight the need for novel interventions. Cinobufagin (CB), a bufadienolide extracted from the parotid secretion of Bufo gargarizans and B. melanostictus, has emerged as a promising compound with multiple antitumor mechanisms. This comprehensive review assesses the current evidence regarding CB and its containing medicine, cinobufacini, in liver cancer models. Cinobufacini is a traditional Chinese medicine extract, whereas CB refers specifically to one of its active components. The pharmacodynamic actions of CB include induction of apoptosis, DNA damage, inhibition of proliferation and migration, and modulation of key oncogenic pathways such as PI3K/Akt/mTOR, Akt/ERK, and AURKA-mTOR-eIF4E. Additionally, CB disrupts tumor metabolism and induces oxidative stress. Preclinical studies, both in vitro and in vivo, demonstrate significant antitumor efficacy. However, concerns remain regarding CB’s toxicity profile at high doses. This review emphasizes the therapeutic potential of CB in HCC treatment and advocates for further translational research to optimize its clinical applicability, dosage, and safety.

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