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Title in Portuguese: Intestinal cell migration damage induced by enteropathogenic Escherichia coli strains
Author: Cavalcante, P. A.
Prata, M. M. G.
Medeiros, P. H. Q. S.
Silva, A.V. Alves da
Quetz, J. S.
Reyes, M. A. V.
Rodrigues, T. S.
Santos, A. K. S.
Ribeiro, S. A.
Veras, H. N.
Bona, M. D.
Amaral, M. S. M. G.
Rodrigues, F. A. P.
Lima, I. F. N.
Havt, A.
Lima, A. A. M. L
Keywords: Escherichia coli Enteropatogênica
Enteropathogenic Escherichia coli
Células Epiteliais
Epithelial Cells
Issue Date: Jul-2018
Publisher: Brazilian Journal of Medical and Biological Research
Citation: CAVALCANTE, P. A. et al. Intestinal cell migration damage induced by enteropathogenic Escherichia coli strains. Braz J Med Biol Res, Ribeirão Preto, v. 51, n.10, e7423, jul. 2018.
Abstract: Epithelial cell migration is an essential response to enteric pathogens such as enteropathogenic Escherichia coli (EPEC). This study aimed to investigate the effects of EPEC infection on intestinal epithelial cell migration in vitro, as well as the involvement of type III secretion system (T3SS) and Rho GTPases. Crypt intestinal epithelial cells (IEC-6) were infected with EPEC strains (E2348/69, DescF, and the LDI001 strain isolated from a malnourished Brazilian child) and commensal E. coli HS. Wound migration and cell death assays were performed at different time-points. Transcription and expression of Rho GTPases were evaluated using real-time PCR and western blotting. Overall, EPEC E2348/69 reduced migration and increased apoptosis and necrosis levels compared to EPEC LDI001 and E. coli HS strains. Moreover, EPEC LDI001 impaired cell migration at a higher level than E. coli HS and increased necrosis after 24 hours compared to the control group. The different profiles of virulence genes between the two wild-type EPEC strains, characterized by the absence of espL and nleE genes in the LDI001, might explain the phenotypic results, playing significant roles on cell migration impairment and cell death-related events. Moreover, the type III secretion system is determinant for the inhibition of intestinal epithelial cell migration by EPEC 2348/69, as its deletion prevented the effect. Active Rac1 concentrations were increased in E2348/69 and LDI001-infected cells, while the T3SS-deficient strain did not demonstrate this activation. This study contributes with valuable insight to characterize the mechanisms involved in the impairment of intestinal cell migration induced by EPEC.
metadata.dc.type: Artigo
ISSN: On-line 1414-431X
Appears in Collections:PPGF - Artigos publicados em revistas científica

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