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Lipoteichoic acid from Staphylococcus aureus induced expression of MMP-9 in human middle ear epithelial cells

Authors
Park, HY; Song, JW; Hong, SP; In, SM; Kim, HJ
Citation
International journal of pediatric otorhinolaryngology, 76(4):475-479, 2012
Journal Title
International journal of pediatric otorhinolaryngology
ISSN
0165-58761872-8464
Abstract
OBJECTIVE: Change in matrix metalloproteinases (MMPs) and regulation of their tissue inhibitors of metalloproteinases (TIMPs) could play certain role in the pathogenesis of otitis media. This study was designed to evaluate the modulation of MMPs and TIMPs in middle ear epithelium by lipoteichoic acid (LTA) isolated from Staphylococcus aureus.



METHODS: Human middle ear epithelial (HMEE) cells were treated with LTA. MMP activities were examined by PCR, ELISA and zymography, and levels of TIMPs were measured by PCR and ELISA.



RESULTS: LTA isolated from S. aureus increased MMP-9 mRNA expression and secretion in HMEE cells, whereas no effect on the expressions of MMP-1, -2, -3, -7 and TIMP-1, -2 was observed.



CONCLUSIONS: LTA increased the activity of MMP-9, not TIMPs in middle ear epithelia, suggesting that disturbed balance between MMP-9 and TIMPs could play an active role in LTA-induced otitis media.
MeSH terms
Cell Culture TechniquesEar, Middle/*drug effects/metabolism/pathologyEpithelial Cells/*drug effects/metabolismHumansLipopolysaccharides/*pharmacologyMatrix Metalloproteinase 9/*metabolismOtitis Media/etiology*Staphylococcus aureusTeichoic Acids/*pharmacologyTissue Inhibitor of Metalloproteinases/*metabolism
DOI
10.1016/j.ijporl.2011.12.028
PMID
22305687
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Otolaryngology
AJOU Authors
박, 헌이김, 현준
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