Aberrant mucin glycoprotein patterns of chronic rhinosinusitis patients with bacterial biofilms

Tan, Lorwai, Psaltis, Alkis, Baker, Leonie M., Mcguckin, Mike, Rousseau, Karine and Wormald, Peter-John (2010) Aberrant mucin glycoprotein patterns of chronic rhinosinusitis patients with bacterial biofilms. American Journal of Rhinology & Allergy, 24 5: 319-324.


Author Tan, Lorwai
Psaltis, Alkis
Baker, Leonie M.
Mcguckin, Mike
Rousseau, Karine
Wormald, Peter-John
Title Aberrant mucin glycoprotein patterns of chronic rhinosinusitis patients with bacterial biofilms
Journal name American Journal of Rhinology & Allergy   Check publisher's open access policy
ISSN 1945-8924
Publication date 2010-09
Sub-type Article (original research)
DOI 10.2500/ajra.2010.24.3504
Volume 24
Issue 5
Start page 319
End page 324
Total pages 6
Place of publication United States
Publisher OceanSide Publications, Inc.
Collection year 2011
Language eng
Formatted abstract Background:
Increasingly bacterial biofilms have been implicated in chronic rhinosinusitis (CRS), and conventional treatment methods have failed to completely eradicate biofilms. (1) Terminal sialic acids present on sinus mucosal glycoproteins are targets for bacterial adherence and biofilm formation. (2) A subpopulation of CRS patients is more susceptible to biofilm formation due to aberrant terminal sialic residue distribution patterns of glycoproteins on their mucosa. (3) The higher levels of sialyl transferase (ST)6Gal1 gene expression contribute to the overall aberrant glycosylation patterns on the host mucosa that predispose this patient cohort to developing biofilms. (4) Mucin glycoprotein MUC7 that has known bactericidal activity displays an overall reduced terminal sugar profile in biofilm positive CRS patients.

Methods:
Confocal scanning laser microscopy, glycoarray analysis, real-time polymerase chain reaction of ST6Gal1, neuraminidase assays and multivariate analysis were used to compare production of sialic acid - degrading enzymes in sinus biopsies from biofilm positive and negative CRS patients with mucosa from healthy controls.

Results:
Biofilm-positive CRS patients expressed aberrant glycoprotein patterns with terminal sialics of between 70 and 90 kD (stress value = 0.1414). The ST6Gal1 gene was upregulated, and bacteria isolated from these patients exhibit significantly higher neuraminidase activity (p = 0.0343). We detected a significant lack in the overall expression of terminal sugar residues of MUC7 (stress value = 0.088).

Conclusions:
We observed a strong positive correlation between the aberrant terminal sugar patterns in this sub group of CRS patients with biofilms. The innate immunity function of their MUC7 glycoprotein against bacterial invasion may be compromised in CRS patients. Copyright © 2010, OceanSide Publications, Inc., U.S.A.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Medicine Publications
 
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Created: Thu, 24 Feb 2011, 13:42:57 EST by Debbie Banks on behalf of School of Medicine