Bacteria as anticancer agents: bioactive metabolites, engineered platforms, and translational mechanisms

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ID: 315841
2026
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Abstract
Bacteria represent a vast and underexplored reservoir of bioactive compounds with significant anticancer potential. Numerous bacterial taxa, particularly actinomycetes, Bacillus, Pseudomonas, and marine-derived species, produce structurally diverse metabolites exhibiting cytotoxic, cytostatic, pro-apoptotic, immunomodulatory, and anti-angiogenic activities against cancer cells. Clinically established agents such as actinomycin D and bleomycin highlight the therapeutic relevance of bacterial natural products, while recent discoveries continue to expand the repertoire of bioactive polyketides, peptides, alkaloids, and proteins. These compounds act through multiple mechanisms, including DNA intercalation, induction of apoptosis, cell cycle arrest, metabolic disruption, and modulation of the tumor microenvironment. Advances in metagenomics, genome mining, and synthetic biology have enabled the identification and activation of previously silent biosynthetic gene clusters, significantly enhancing drug discovery potential. In addition to metabolite-based anticancer agents, advances in synthetic biology have enabled the development of engineered bacterial platforms capable of selectively colonizing tumors, delivering therapeutic molecules, and activating prodrug therapies within the tumor microenvironment. Despite ongoing challenges related to toxicity, limited yield, selectivity, and clinical translation, bacterial-derived compounds remain a promising frontier in oncology. This review summarizes bacterial sources, bioactive metabolites, molecular mechanisms, preclinical and clinical applications, and future prospects for developing effective and safe anticancer strategies.
Reference Key
openalex_W7163559282 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Manel Gharbi, Mohamed Salah Abbassi
Journal letters in applied microbiology
Year 2026
DOI
10.1093/lambio/ovag050
URL
https://doi.org/10.1093/lambio/ovag050
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