Please use this identifier to cite or link to this item:
Title: Role of heparan sulphate proteoglycans as potential receptors for non-piliated Pseudomonas aeruginosa adherence to non-polarised airway epithelial cells
Authors: Plotkowski, M. C.
Costa, A. O.
Morandi, V
Barbosa, H. S.
Nader, Helena Bonciani [UNIFESP]
De Bentzmann, S.
Puchelle, E.
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Federal de São Paulo (UNIFESP)
Issue Date: 1-Feb-2001
Publisher: Lippincott Williams & Wilkins
Citation: Journal Of Medical Microbiology. Philadelphia: Lippincott Williams & Wilkins, v. 50, n. 2, p. 183-190, 2001.
Abstract: Tight junctions seal polarised surface epithelial respiratory cells so as to prevent the passage of bacteria and toxins through the epithelial sheet. Disruption of tight junctions, which may occur during injury and repair processes of airway epithelium, favours potential bacterial interaction with receptors from cell basolateral membranes. Earlier studies reported that non-polarised and untight epithelial respiratory cells are highly susceptible to Pseudomonas aeruginosa adherence and internalisation, As heparan sulphate proteoglycans (HSP) from cell basolateral membranes in epithelial cells without tight junctions may become accessible to bacterial ligands, the present study investigated their role as potential receptors for non-piliate P. aeruginosa ligands, Treatment of cells with heparitinase I and II significantly reduced (51.2% and 51.7%, respectively) P. aeruginosa adherence to epithelial respiratory cells without tight junctions, The internalisation of bacteria was not affected by treatment,vith heparitinases, Treatment of the bacteria with heparin and heparan sulphate also significantly reduced their adherence to respiratory cells (34.3% and 43.7%, respectively). Treatment of cells with other enzymes (trypsin, lipase and chondroitinase ABC) or treatment of bacteria with chondroitin-4-sulphate did not modify the adherence to respiratory cells significantly. Both affinity chromatography and Western blotting assays showed the interaction of different P. aeruginosa outer-membrane proteins (OMPs) with heparin, Several bacterial strains showed differences in their profile of heparin-binding OMPs, but all exhibited low mol, wt (< 30 kDa) reactive proteins. Reactivity of whole bacterial cells with heparin was also observed by transmission electron microscopy, These results suggest that HSP are potential receptors for P. aeruginosa adherence to non-polarised and untight epithelial respiratory cells.
ISSN: 0022-2615
Other Identifiers:
Appears in Collections:Artigo

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.