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A study published in Pharmacological Research (2023) investigated how berberine affects breast cancer cells under hypoxic conditions, which are commonly found in tumor microenvironments. Using both in vitro and in vivo models, researchers found that berberine significantly altered the composition and diversity of gut microbiota in treated mice, which was associated with improved survival rates. Metabolomic analysis using LC-MS/MS also showed that berberine regulates several endogenous metabolites, especially L-palmitoylcarnitine, suggesting that metabolic modulation may contribute to its anticancer effects.Further experiments demonstrated that berberine inhibited the proliferation of several breast cancer cell lines, including MDA-MB-231, MCF-7, and 4T1, under hypoxic conditions. Functional assays such as wound healing and trans-well invasion tests revealed that berberine suppressed the migration and invasion of breast cancer cells. Molecular analysis indicated that berberine reduced the expression of hypoxia-inducible factor-1α (HIF-1α) at both gene and protein levels, which is a key regulator of tumor growth in low-oxygen environments. Overall, the findings suggest that berberine can effectively suppress breast carcinoma growth and metastasis by influencing gut microbiota, endogenous metabolites, and hypoxia-related signaling pathways, highlighting its potential as a promising anti-neoplastic agent.PMID: 37315824