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Cited by 230

The DOI matches its Crossref record; 11 of the 11 references it cites were found in a registry or an index.

Global Changes in Staphylococcus aureus Gene Expression in Human Blood

Open access
Malachowa, Natalia, Whitney, Adeline R., Kobayashi, Scott D., Sturdevant, Daniel E., Kennedy, Adam D., Braughton, Kevin R., Shabb, Duncan W., Diep, Binh An, Chambers, Henry F., Otto, Michael, DeLeo, Frank R.·2011·PLoS ONE

Abstract

Staphylococcus aureus is a leading cause of bloodstream infections worldwide. In the United States, many of these infections are caused by a strain known as USA300. Although progress has been made, our understanding of the S. aureus molecules that promote survival in human blood and ultimately facilitate metastases is incomplete. To that end, we analyzed the USA300 transcriptome during culture in human blood, human serum, and trypticase soy broth (TSB), a standard laboratory culture media. Notably, genes encoding several cytolytic toxins were up-regulated in human blood over time, and hlgA, hlgB, and hlgC (encoding gamma-hemolysin subunits HlgA, HlgB, and HlgC) were among the most highly up-regulated genes at all time points. Compared to culture supernatants from a wild-type USA300 strain (LAC), those derived from an isogenic hlgABC-deletion strain (LACΔhlgABC) had significantly reduced capacity to form pores in human neutrophils and ultimately cause neutrophil lysis. Moreover, LACΔhlgABC had modestly reduced ability to cause mortality in a mouse bacteremia model. On the other hand, wild-type and LACΔhlgABC strains caused virtually identical abscesses in a mouse skin infection model, and bacterial survival and neutrophil lysis after phagocytosis in vitro was similar between these strains. Comparison of the cytolytic capacity of culture supernatants from wild-type and isogenic deletion strains lacking hlgABC, lukS/F-PV (encoding PVL), and/or lukDE revealed functional redundancy among two-component leukotoxins in vitro. These findings, along with a requirement of specific growth conditions for leukotoxin expression, may explain the apparent limited contribution of any single two-component leukotoxin to USA300 immune evasion and virulence.

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Metadata

Authors
Malachowa, N., Whitney, A. R., Kobayashi, S. D., Sturdevant, D. E., Kennedy, A. D., Braughton, K. R., Shabb, D. W., Diep, B. A., Chambers, H. F., Otto, M., & DeLeo, F. R.
Venue
PLoS ONE
Published
2011-04-15
Volume
6
Issue
4
Pages
e18617
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2048580389
Cited by
230
References
11
FWCI
13.61
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Global Changes in Staphylococcus aureus Gene Expression in Human Blood. https://app.cochat.ai/papers/10.1371/journal.pone.0018617
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Malachowa, N., Whitney, A. R., Kobayashi, S. D., Sturdevant, D. E., Kennedy, A. D., Braughton, K. R., Shabb, D. W., Diep, B. A., Chambers, H. F., Otto, M., & DeLeo, F. R. (2011). Global Changes in Staphylococcus aureus Gene Expression in Human Blood. PLoS ONE. https://doi.org/10.1371/journal.pone.0018617

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