Journal
INFECTION AND IMMUNITY
Volume 70, Issue 8, Pages 4697-4700Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/IAI.70.8.4697-4700.2002
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- NEI NIH HHS [EY11648] Funding Source: Medline
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Wild-type Staphylococcus aureus was observed to be capable of invading human corneal epithelial cells (HCEC) in vitro. Internalization of S. aureus required expression of fibronectin-binding proteins (FnBPs); the capacity of an FnBP-deficient isogenic strain to invade HCEC was reduced by more than 99%. The binding of S. aureus to HCEC did not require viable bacteria, since UV-killed cells were observed to adhere efficiently. Invasion of HCEC by S. aureus involved active host cell mechanisms; uptake was nearly completely eliminated by cytochalasin D and genistein. These data suggest that FnBPs play a key role in host-parasite interactions and may serve as an important adhesin or invasin in ulcerative keratitis caused by S. aureus.
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