Deletion of two-component system QseBC weakened virulence of Glaesserella parasuis in a murine acute infection model and adhesion to host cells

Autor: Xuefeng Yan, Ke Dai, Congwei Gu, Zehui Yu, Manli He, Wudian Xiao, Mingde Zhao, Lvqin He
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: PeerJ, Vol 10, p e13648 (2022)
Druh dokumentu: article
ISSN: 2167-8359
DOI: 10.7717/peerj.13648
Popis: The widespread two-component system (TCS), QseBC, involves vital virulence regulators in Enterobacteriaceae and Pasteurellaceae. Here we studied the function of QseBC in Glaesserella parasuis. A ΔqseBC mutant was constructed using a Glaesserella parasuis serovar 11 clinical strain SC1401 by natural transformation. Immunofluorescence was used to evaluate cellular adhesion, the levels of inflammation and apoptosis. The ability of ΔqseBC and ΔqseC mutant strains to adhere to PAM and MLE-12 cells was significantly reduced. Additionally, by focusing on the clinical signs, H&E, and IFA for inflammation and apoptosis, we found that the ΔqseBC mutant weakened virulence in the murine models. Together, these findings suggest that QseBC plays an important role in the virulence of Glaesserella parasuis.
Databáze: Directory of Open Access Journals