Falzano L, Quaranta MG, Travaglione S, Filippini P, Fabbri A, Viora M, Donelli G, Fiorentini C. Cytotoxic necrotizing factor 1 enhances reactive oxygen species-dependent transcription and secretion of proinflammatory cytokines in human uroepithelial cells.
Infect Immun 2003;
71:4178-81. [PMID:
12819113 PMCID:
PMC162030 DOI:
10.1128/iai.71.7.4178-4181.2003]
[Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2002] [Revised: 01/27/2003] [Accepted: 03/28/2003] [Indexed: 11/20/2022] Open
Abstract
Uropathogenic Escherichia coli strains frequently produce a Rho-activating protein toxin named cytotoxic necrotizing factor type 1 (CNF1). We herein report that CNF1 promotes transcription and release of tumor necrosis factor alpha, gamma interferon, interleukin-6 (IL-6), and IL-8 proinflammatory cytokines and increases the production of reactive oxygen species (ROS) in uroepithelial T24 cells. The antioxidant N-acetyl-L-cysteine counteracts these phenomena, a fact which suggests a role for ROS-mediated signaling in CNF1-induced proinflammatory cytokine production.
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