Advanced search
Start date
Betweenand

Function of type VI secretion systems of pathogenic bacteria in the interaction with eukaryotic cells

Grant number: 17/02178-2
Support type:Research Grants - Young Investigators Grants
Duration: March 01, 2018 - February 28, 2023
Field of knowledge:Biological Sciences - Microbiology - Biology and Physiology of Microorganisms
Principal researcher:Ethel Bayer Santos
Grantee:Ethel Bayer Santos
Home Institution: Instituto de Ciências Biomédicas (ICB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Assoc. researchers:Cristiane Rodrigues Guzzo Carvalho ; Robson Francisco de Souza
Associated scholarship(s):21/03400-6 - Development of a universal pipeline for genomic context analysis from different sources of data., BP.TT
21/02536-1 - Identification of new effectors secreted by the Salmonella T6SS using in silico approaches and functional characterization of a candidate, BP.MS
20/15389-4 - Cloning and antibacterial activity of novel Salmonella T6SS effectors, BP.IC
+ associated scholarships 19/27644-1 - Contribution of HCPs to the SPI-6 T6SS-dependent pathogenesis of Salmonella Typhimurium, BP.MS
19/22715-8 - Function of Salmonella bongori SPI-22 T6SS in bacterial competitions and interactions with phagocytic host cells, BP.MS
18/25316-4 - Function of SPI-6 T6SS and SPI-19 T6SS of Salmonella during competition with the gut microbiota, BP.IC
18/13819-1 - Analysis of the activation dynamics of the type 6 secretion system of Salmonella during infection of eukaryotic cells, BP.IC
18/04553-8 - Function of type VI secretion systems of pathogenic bacteria in the interaction with eukaryotic cells, BP.JP - associated scholarships

Abstract

Bacterial secretion systems are versatile structures that secrete proteins and DNA in the extracellular medium or into prokaryotic and eukaryotic cells. Many pathogenic bacteria rely on secretion systems to modulate hosts responses or to defend themselves against competing organisms and predators. The type VI secretion system (T6SS) is present in several animal and plant pathogens. Serotypes of Salmonella enteric comprise facultative intracellular Gram-negative bacteria responsible for causing infections in various vertebrates. Most Salmonella serotypes encode a T6SS in the pathogenicity island SPI-6. However, some serotypes encode a T6SS in SPI-19, and a few examples encode two T6SS (SPI-6 and SPI-19). Deletion of essential T6SS genes reduced bacterial virulence in models of systemic mice and chicken infection, indicating that T6SS plays an important role during infection. However, the function of T6SS during infection of eukaryotic cells was not clarified. In this context, the main goal of this project is to study the function of both Salmonella T6SSs (SPI-6 and SPI-19) during interactions with eukaryotic cells. We will investigate the role of Salmonella T6SS during infection of mammalian cells and free-living amoeba, identifying the proteins secreted, and the molecular mechanisms that regulate the function of these proteins inside eukaryotic cells. There are a few research groups worldwide focused on studying the role of T6SS in the interaction of bacteria with eukaryotic cells and most groups have their attention on bacterial competitions. Since none of these groups are in Brazil, we intend to develop an innovative research field with great international insertion due to its pioneering potential. (AU)

Articles published in Agência FAPESP Newsletter about the research grant:
Articles published in other media outlets (0 total):
More itemsLess items
VEICULO: TITULO (DATA)
VEICULO: TITULO (DATA)

Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SIBINELLI-SOUSA, STEPHANIE; DE ARAUJO-SILVA, ANDRE LUIZ; HESPANHOL, JULIA TAKUNO; ETHEL, BAYER-SANTOS. Revisiting the steps of Salmonella gut infection with a focus on antagonistic interbacterial interactions. FEBS Journal, OCT 2021. Web of Science Citations: 0.
SIBINELLI-SOUSA, STEPHANIE; HESPANHOL, JULIA TAKUNO; BAYER-SANTOS, ETHEL. Targeting the Achilles' Heel of Bacteria: Different Mechanisms To Break Down the Peptidoglycan Cell Wall during Bacterial Warfare. Journal of Bacteriology, v. 203, n. 7 APR 2021. Web of Science Citations: 0.
SIBINELLI-SOUSA, STEPHANIE; HESPANHOL, JULIA T.; NICASTRO, GIANLUCCA G.; MATSUYAMA, BRUNO Y.; MESNAGE, STEPHANE; PATEL, ANKUR; DE SOUZA, ROBSON F.; GUZZO, CRISTIANE R.; BAYER-SANTOS, ETHEL. A Family of T6SS Antibacterial Effectors Related to L,D-Transpeptidases Targets the Peptidoglycan. CELL REPORTS, v. 31, n. 12 JUN 23 2020. Web of Science Citations: 0.
BAYER-SANTOS, ETHEL; CENENS, WILLIAM; MATSUYAMA, BRUNO YASUI; OKA, GABRIEL UMAJI; DI SESSA, GIANCARLO; MININEL, IZABEL DEL VALLE; ALVES, TIAGO LUBIANA; FARAH, CHUCK SHAKER. The opportunistic pathogen Stenotrophomonas maltophilia utilizes a type IV secretion system for interbacterial killing. PLOS PATHOGENS, v. 15, n. 9 SEP 2019. Web of Science Citations: 1.
BAYER-SANTOS, ETHEL; CESETI, LUCAS DE MORAES; FARAH, CHUCK SHAKER; ALVAREZ-MARTINEZ, CRISTINA ELISA. Distribution, Function and Regulation of Type 6 Secretion Systems of Xanthomonadales. FRONTIERS IN MICROBIOLOGY, v. 10, JUL 17 2019. Web of Science Citations: 0.
SGRO, GERMAN G.; OKA, GABRIEL U.; SOUZA, DIORGE P.; CENENS, WILLIAM; BAYER-SANTOS, ETHEL; MATSUYAMA, BRUNO Y.; BUENO, NATALIA F.; DOS SANTOS, THIAGO RODRIGO; ALVAREZ-MARTINEZ, CRISTINA E.; SALINAS, ROBERTO K.; FARAH, CHUCK S. Bacteria-Killing Type IV Secretion Systems. FRONTIERS IN MICROBIOLOGY, v. 10, MAY 21 2019. Web of Science Citations: 2.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.