| Full text | |
| Author(s): |
Bueris, Vanessa
[1]
;
Huerta-Cantillo, Jazmn
[2]
;
Navarro-Garcia, Fernando
[2]
;
Ruiz, Renato M.
[1]
;
Cianciarullo, Aurora M.
[3]
;
Elias, Waldir P.
[1]
Total Authors: 6
|
| Affiliation: | [1] Inst Butantan, Bacteriol Lab, Sao Paulo - Brazil
[2] CINVESTAV IPN, Ctr Invest & Estudios Avanzados IPN, Dept Cell Biol, Mexico City, DF - Mexico
[3] Inst Butantan, Genet Lab, Sao Paulo - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Infection and Immunity; v. 83, n. 1, p. 379-388, JAN 2015. |
| Web of Science Citations: | 8 |
| Abstract | |
Enteropathogenic Escherichia coli (EPEC) is classified as typical (tEPEC) or atypical (aEPEC) based on the presence or absence of the E. coli adherence factor plasmid (pEAF), respectively. The hallmark of EPEC infection is the formation of the attaching and effacing (A/E) lesions on the gut mucosa. We compared the kinetics of A/E lesion formation induced by aEPEC and tEPEC. The examination of infected HEp-2 cells clearly demonstrated delayed A/E lesion formation by aEPEC in comparison to tEPEC. This delay was associated with the expression of locus of enterocyte effacement (LEE)-encoded virulence factors (i.e., intimin and EspD). Indeed, the insertion of a plasmid containing perABC, a transcriptional regulator of virulence factors involved in A/E formation, into aEPEC strains increased and accelerated the formation of A/E lesions. Interestingly, the enhanced expression and translocation of LEE-encoded proteins, such as those expressed in LEE5 (intimin) and LEE4 (EspD), in aEPEC (perABC) was independent of bacterial adhesion. The secretion kinetics of these two proteins representing LEE5 and LEE4 expression correlated with A/E lesion formation. We conclude that the lack of Per in the regulation network of virulence genes is one of the main factors that delay the establishment of A/E lesions induced by aEPEC strains. (AU) | |
| FAPESP's process: | 04/12136-5 - Atypical enteropathogenetic Escherichia coli (atypical EPEC) |
| Grantee: | Waldir Pereira Elias Junior |
| Support Opportunities: | Research Projects - Thematic Grants |