Flow cytometric analysis of adherence of Porphyromonas gingivalis to oral epithelial cells.

Flow cytometric analysis of adherence of Porphyromonas gingivalis to oral epithelial cells. Research Abstract Details 

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Flow cytometric analysis of adherence of Porphyromonas gingivalis to oral epithelial cells. Abstract Text:

Rishi D Pathirana,Neil M O'Brien-Simpson,Kumar Visvanathan,John A Hamilton,Eric C Reynolds,

By using fluorescence microscopy, fluorescently labeled Porphyromonas gingivalis W50 was shown to adhere to oral epithelial (KB) cells as discrete cells or small cell aggregates, whereas P. gingivalis ATCC 33277 bound as large cell aggregates. Flow cytometric analysis showed that for P. gingivalis W50 there was a logarithmic relationship between the bacterial cell ratio (BCR), that is the number of bacterial cells to KB cells, and the percentage of KB cells with W50 cells attached. This percentage of KB cells with W50 attached reached a plateau of approximately 84% cells at a BCR of 500:1. In contrast, a quadratic relationship was observed between BCR and the percentage of KB cells with P. gingivalis ATCC 33277 attached, reaching a maximum of 47% at a BCR of 100:1 but decreasing to 7% at a BCR of 1,000:1. The lower binding of ATCC 33277 at high cell concentrations was attributed to autoaggregation. P. gingivalis W50 cells treated with an inhibitor (Nalpha-p-tosyl-L-lysine chloromethyl ketone [TLCK]) of its RgpA-Kgp proteinase-adhesin complex exhibited significantly reduced binding to KB cells than to untreated cells, suggesting a role for proteinase activity in binding to KB cells. Competitive inhibition with purified proteinase-active and TLCK-inactivated RgpA-Kgp complex significantly decreased the adherence of P. gingivalis W50 cells to KB cells. Furthermore, isogenic mutants of P. gingivalis W50 lacking the kgp gene product, but not the rgpA or rgpB gene products, exhibited significantly decreased adherence to KB cells compared to the wild type.

Flow cytometric analysis of adherence of Porphyromonas gingivalis to oral epithelial cells. Publishing Authors By Initials

RD Pathirana,NM O'Brien-Simpson,K Visvanathan,JA Hamilton,EC Reynolds,

For similar bacteria: bacteroidetes: bacteroidaceae: porphyromonas: porphyromonas gingivalis research abstracts see: bacteria: bacteroidetes: bacteroidaceae: porphyromonas: porphyromonas gingivalis research

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MEDLINE DATE:

Flow cytometric analysis of adherence of Porphyromonas gingivalis to oral epithelial cells. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Infection and immunity

VOLUME: 75

Page Numbers: 2484-92

Journal Abbreviation:

ISSN: 0019-9567

DAY: 5

MONTH: 03

YEAR: 2007

Flow cytometric analysis of adherence of Porphyromonas gingivalis to oral epithelial cells. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 246127

Flow cytometric analysis of adherence of Porphyromonas gingivalis to oral epithelial cells. Keywords Mesh Terms:

KEYWORDS: Porphyromonas gingivalis

MESH TERMS: physiology

Chemical & Substance for Abstract: Flow cytometric analysis of adherence of Porphyromonas gingivalis to oral epithelial cells. Information

Substance Name: argingipain, Porphyromonas gingivalis

Registry Number: EC 3.4.22.37

Grant and Affiliation Information for Flow cytometric analysis of adherence of Porphyromonas gingivalis to oral epithelial cells.

AFFILIATION: Cooperative Centre for Oral Health Science, School of Dental Science, The University of Melbourne, 720 Swanston Street, Melbourne, Victoria 3010, Australia.

Country: United States

AGENCY: United States NIDCR

GRANT: 1R01DE14198-01

ACRONYM: DE

MEDLINETA: Infect Immun

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