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Disease Markers
Volume 22, Issue 5-6, Pages 303-308
http://dx.doi.org/10.1155/2006/865890

TLR-4 and CD14 Polymorphisms in Respiratory Syncytial Virus Associated Disease

Beena Puthothu,1 Johannes Forster,1,2 Andrea Heinzmann,1 and Marcus Krueger1

1University Children’s Hospital, University of Freiburg, Mathildenstrasse 1, D-79106 Freiburg, Germany
2St. Josef’s Hospital, Sautier Str. 1, D-79104 Freiburg, Germany

Received 18 January 2007; Accepted 18 January 2007

Copyright © 2006 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Respiratory syncytial virus (RSV) is the most common viral respiratory pathogen during infancy world wide. It induces innate and adaptive immune response in host cells. The toll like receptor 4 (TLR4)/CD14 complex is particularly important for the initiation of an innate immune response to RSV. Thus we were interested whether an association exists between severe RSV associated diseases and polymorphisms within TLR4 and CD14.

We genotyped the CD14 promotor polymorphism -C159T and the two common TLR4 amino acid variants (D259G, and T359I) in 131 infants with severe RSV associated diseases and 270 controls. Statistical analyses of single polymorphisms made use of the Armitage’s trend test, haplotypes were calculated by FAMHAP, FASTEHPLUS and Arlequin.

All polymorphisms were in Hardy Weinberg Equilibrium. We found marginal association between amino acid exchange D259G in TLR4 with RSV infection p = 0.0545). Furthermore, haplotypes analysis of the two TLR4 polymorphisms by three independent programs revealed association of haplotypes with severe RSV infection (p ≤ 0.0010). In contrast, the promotor polymorphism within CD14 was not associated with susceptibility to RSV disease. We conclude from our study, that TLR4 polymorphisms, and particularly the haplotypes, may influence the genetic predisposition to severe RSV infection.