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Interaction of matrix metalloprotease-9 and Zpx in Cronobacter turicensis LMG 23827T mediated infections in the zebrafish model


Eshwar, Athmanya Konegadde; Wolfrum, Nina; Stephan, R; Fanning, Séamus; Lehner, Angelika (2018). Interaction of matrix metalloprotease-9 and Zpx in Cronobacter turicensis LMG 23827T mediated infections in the zebrafish model. Cellular Microbiology, 20(11):e12888.

Abstract

Bacteria belonging to the genus Cronobacter have been recognized as causative agents of life-threatening systemic infections primarily in premature and low-birthweight neonates. Validation of putative bacterial virulence components as well as host factors potentially involved in the response to infection has been hampered in the past by the availability of suitable neonatal animal models. In the current study, the zebrafish embryo model was employed to study the interaction of the zinc metalloproteinase Zpx present in Cronobacter turicensis LMG 23827T , with the eukaryotic MMP-9, a proteinase that functions to cleave extracellular matrix gelatin and collagen. Cleavage and activation of the human recombinant pro-MMP-9 by zpx-expressing C. turicensis cells were demonstrated in vitro, and the presence and increase of the processed, active form of zebrafish pro-MMP-9 were shown in vivo. We provided evidence that Zpx induces the expression of the mmp-9 but also increases the levels of processed MMP-9 during infection. The involvement of the MMP-9 in induction of the expression of the bacterial Zpx was shown in zebrafish mmp-9 morphant experiments. This study identified MMP-9 as a substrate of Zpx and demonstrated yet-undescribed mutual cross-talk between these two proteases in infections mediated by C. turicensis LMG 23827T .

Abstract

Bacteria belonging to the genus Cronobacter have been recognized as causative agents of life-threatening systemic infections primarily in premature and low-birthweight neonates. Validation of putative bacterial virulence components as well as host factors potentially involved in the response to infection has been hampered in the past by the availability of suitable neonatal animal models. In the current study, the zebrafish embryo model was employed to study the interaction of the zinc metalloproteinase Zpx present in Cronobacter turicensis LMG 23827T , with the eukaryotic MMP-9, a proteinase that functions to cleave extracellular matrix gelatin and collagen. Cleavage and activation of the human recombinant pro-MMP-9 by zpx-expressing C. turicensis cells were demonstrated in vitro, and the presence and increase of the processed, active form of zebrafish pro-MMP-9 were shown in vivo. We provided evidence that Zpx induces the expression of the mmp-9 but also increases the levels of processed MMP-9 during infection. The involvement of the MMP-9 in induction of the expression of the bacterial Zpx was shown in zebrafish mmp-9 morphant experiments. This study identified MMP-9 as a substrate of Zpx and demonstrated yet-undescribed mutual cross-talk between these two proteases in infections mediated by C. turicensis LMG 23827T .

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Institute of Food Safety and Hygiene
05 Vetsuisse Faculty > Institute of Veterinary Bacteriology
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Language:English
Date:4 July 2018
Deposited On:12 Feb 2019 15:34
Last Modified:12 Feb 2019 15:34
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:1462-5814
OA Status:Closed
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1111/cmi.12888
PubMed ID:29972620

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