Journal article
MntABC and MntH Contribute to Systemic Staphylococcus aureus Infection by Competing with Calprotectin for Nutrient Manganese
Infection and immunity, Vol.81(9), pp.3395-3405
09/01/2013
DOI: 10.1128/IAI.00420-13
PMCID: PMC3754211
PMID: 23817615
Abstract
During infection, vertebrates limit access to manganese and zinc, starving invading pathogens, such as
Staphylococcus aureus
, of these essential metals in a process termed “nutritional immunity.” The manganese and zinc binding protein calprotectin is a key component of the nutrient-withholding response, and mice lacking this protein do not sequester manganese from
S. aureus
liver abscesses. One potential mechanism utilized by
S. aureus
to minimize host-imposed manganese and zinc starvation is the expression of the metal transporters MntABC and MntH. We performed transcriptional analyses of both
mntA
and
mntH
, which revealed increased expression of both systems in response to calprotectin treatment. MntABC and MntH compete with calprotectin for manganese, which enables
S. aureus
growth and retention of manganese-dependent superoxide dismutase activity. Loss of MntABC and MntH results in reduced staphylococcal burdens in the livers of wild-type but not calprotectin-deficient mice, suggesting that these systems promote manganese acquisition during infection. During the course of these studies, we observed that metal content and the importance of calprotectin varies between murine organs, and infection leads to profound changes in the anatomical distribution of manganese and zinc. In total, these studies provide insight into the mechanisms utilized by bacteria to evade host-imposed nutrient metal starvation and the critical importance of restricting manganese availability during infection.
Details
- Title: Subtitle
- MntABC and MntH Contribute to Systemic Staphylococcus aureus Infection by Competing with Calprotectin for Nutrient Manganese
- Creators
- Thomas E. Kehl-Fie - Vanderbilt UniversityYaofang Zhang - Vanderbilt UniversityJessica L. Moore - Vanderbilt UniversityAllison J. Farrand - Vanderbilt UniversityM. Indriati Hood - Vanderbilt UniversitySubodh Rathi - Vanderbilt UniversityWalter J. Chazin - Vanderbilt UniversityRichard M. Caprioli - Vanderbilt UniversityEric P. Skaar - Vanderbilt University
- Resource Type
- Journal article
- Publication Details
- Infection and immunity, Vol.81(9), pp.3395-3405
- Publisher
- American Society for Microbiology
- DOI
- 10.1128/IAI.00420-13
- PMID
- 23817615
- PMCID
- PMC3754211
- ISSN
- 0019-9567
- eISSN
- 1098-5522
- Language
- English
- Date published
- 09/01/2013
- Academic Unit
- Microbiology and Immunology
- Record Identifier
- 9984618640502771
Metrics
3 Record Views