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Bacterial neuraminidase facilitates mucosal infection by participating in biofilm production

Show simple item record Soong, Grace en_US Muir, Amanda en_US Gomez, Marisa I. en_US Waks, Jonathan en_US Reddy, Bharat en_US Planet, Paul en_US Singh, Pradeep en_US Kanetko, Yukihiro en_US Wolfgang, Matthew C. en_US Hsiao, Yu-Shan en_US Tong, Liang en_US Prince, Alice en_US 2010-05-06T20:06:24Z 2010-05-06T20:06:24Z 2006-08-01 en_US
dc.identifier.citation Soong G, Muir A, Gomez MI, et al. Bacterial neuraminidase facilitates mucosal infection by participating in biofilm production. J Clin Invest. 2006;116(8):2297-2305. en_US
dc.identifier.other 10.1172/JCI27920 en_US
dc.identifier.uri en_US
dc.description.abstract Many respiratory pathogens, including Hemophilus influenzae, Streptococcus pneumoniae, and Pseudomonas aeruginosa, express neuraminidases that can cleave α2,3-linked sialic acids from glycoconjugates. As mucosal surfaces are heavily sialylated, neuraminidases have been thought to modify epithelial cells by exposing potential bacterial receptors. However, in contrast to neuraminidase produced by the influenza virus, a role for bacterial neuraminidase in pathogenesis has not yet been clearly established. We constructed a mutant of P. aeruginosa PAO1 by deleting the PA2794 neuraminidase locus (Δ2794) and tested its virulence and immunostimulatory capabilities in a mouse model of infection. Although fully virulent when introduced i.p., the Δ2794 mutant was unable to establish respiratory infection by i.n. inoculation. The inability to colonize the respiratory tract correlated with diminished production of biofilm, as assessed by scanning electron microscopy and in vitro assays. The importance of neuraminidase in biofilm production was further demonstrated by showing that viral neuraminidase inhibitors in clinical use blocked P. aeruginosa biofilm production in vitro as well. The P. aeruginosa neuraminidase has a key role in the initial stages of pulmonary infection by targeting bacterial glycoconjugates and contributing to the formation of biofilm. Inhibiting bacterial neuraminidases could provide a novel mechanism to prevent bacterial pneumonia. en_US
dc.description.sponsorship NIH grant R01 DK39693. en_US
dc.language.iso en_US en_US
dc.title Bacterial neuraminidase facilitates mucosal infection by participating in biofilm production en_US

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