Journal: Antibiotics
Article Title: Antimicrobial and Cytoprotective Effects of Tea Extracts Against Escherichia coli -Producing Colibactin Toxin Infections
doi: 10.3390/antibiotics14090886
Figure Lengend Snippet: Proposed mechanism of action by which tea extracts (green, oolong, and black tea) and tea compounds (catechin and caffeine) inhibit E. coli colibactin toxin infection in colon cells. Tea extracts and compounds showed strong antimicrobial activity against colibactin-producing E. coli . They protected Caco-2 cells from cytopathic effects (megalocytosis, cell debris), improved cell viability, and reduced colibactin-induced DNA damage. E. coli infection downregulated CDK-1 and upregulated CDK-2 , causing cell cycle arrest and DNA damage. Tea extracts and compounds restored normal cell cycle regulation (↑ CDK-1 , ↓ CDK-2 ) and catechin promoted cell proliferation via Ki-67 expression.
Article Snippet: In terms of the cell cycle, the study revealed that E. coli ATCC 25922 downregulated CDK-1 and upregulated CDK-2 in Caco-2 cells, leading to cell cycle arrest and increased DNA damage.
Techniques: Infection, Activity Assay, Expressing