ZINC and CANCER: How Enterotoxigenic Bacteroides fragilis (ETBF) Alters Zinc Transporter Dynamics Across Divergent Carcinomas

Title: Systemic Nutritional Immunity and Pathogenic Zinc Theft: How Enterotoxigenic Bacteroides fragilis (ETBF) Alters Zinc Transporter Dynamics Across Divergent Carcinomas.

 

Short Description: Why do some cancers hoard zinc while others completely purge it? This paper unmasks an unseen variable: systemic zinc-theft driven by the gut pathobiont ETBF. Because the bacterial toxin (BFT) is a zinc-dependent metalloprotease, the human host executes organ-specific "nutritional immunity" defenses to lock the mineral away. This creates a cellular paradox: breast cells hoard zinc to clear the extracellular space (causing tumor growth), while liver and prostate cells dump zinc (misfolding the p53 tumor suppressor). The paper outlines the biochemistry of this host-pathogen war, proves it via a diagnostic "chelation paradox," and introduces tailored, pathogen-shielded zinc treatments to tip the balance back to patient survival.