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The role of surfactant protein D in the colonisation of the respiratory tract and onset of bacteraemia during pneumococcal pneumonia

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journal contribution
posted on 24.10.2012, 09:11 by R. Jounblat, H. Clark, P. Eggleton, S. Hawgood, P. W. Andrew, A. Kadioglu
We have shown previously that surfactant protein D (SP-D) binds and agglutinates Streptococcus pneumoniae in vitro. In this study, the role of SP-D in innate immunity against S. pneumoniae was investigated in vivo, by comparing the outcome of intranasal infection in surfactant protein D deficient (SP-D-/-) to wildtype mice (SP-D+/+). Deficiency of SP-D was associated with enhanced colonisation and infection of the upper and lower respiratory tract and earlier onset and longer persistence of bacteraemia. Recruitment of neutrophils to inflammatory sites in the lung was similar in both strains mice in the first 24 hrs post-infection, but different by 48 hrs. T cell influx was greatly enhanced in SP-D-/- mice as compared to SP-D+/+ mice. Our data provides evidence that SP-D has a significant role to play in the clearance of pneumococci during the early stages of infection in both pulmonary sites and blood.

History

Citation

Respiratory Research 2005, 6:126

Published in

Respiratory Research 2005

Publisher

BioMed Central

issn

1465-9921

eissn

1465-993X

Copyright date

2005

Available date

24/10/2012

Publisher version

http://respiratory-research.com/content/6/1/126

Language

English