Association between the Asp299Gly polymorphisms in the Toll-like receptor 4 and premature births in the Finnish population.

Abstract:

:Premature birth causes significant health risks of the neonate and increases the cost for neonatal care. Urogenital infection, often caused by Gram-negative bacteria, is a known risk factor. Toll-like receptor-4 (TLR4) is the major endotoxin-signaling receptor and as such is crucial for the initiation of the innate immune response against Gram-negative bacteria. Recently, a variant in the human TLR4 gene was shown to be associated with impaired receptor function and an increased likelihood of Gram-negative sepsis. In the present study, we determined whether the same polymorphism in TLR4 gene is associated with an increased risk for premature birth. We analyzed genotypes for a Finnish study population consisting of a total of 351 term infants and 440 premature infants (gestational age <35 wk; 282 singletons, 158 multiples) and 94 mothers for the presence of the TLR4 polymorphisms Asp299Gly and Thr399Ile. These polymorphisms were in linkage disequilibrium. The 299Gly allele frequencies were 10.6% (93 of 880) in premature infants and 8.3% (58 of 72) in term infants. Excluding multiple pregnancies that often result in premature births, 23.8% (67 of 282) of premature infants and 24.2% (15 of 62) of the mothers of premature infants compared with 15.9% (55 of 345) of term infants and 15.0% (3 of 20) of the mothers delivering at term were carriers of the TLR4 variant. The frequencies of 299Gly allele and Asp/Gly or Gly/Gly genotype carrier status in premature singleton infants were higher than in term singleton infants (p = 0.024, p = 0.028, respectively) or in premature multiples (p = 0.036, p = 0.044, respectively). According to the present results an allelic variation in the TLR4 receptor was associated with increased risk of premature birth.

journal_name

Pediatr Res

journal_title

Pediatric research

authors

Lorenz E,Hallman M,Marttila R,Haataja R,Schwartz DA

doi

10.1203/00006450-200209000-00011

subject

Has Abstract

pub_date

2002-09-01 00:00:00

pages

373-6

issue

3

eissn

0031-3998

issn

1530-0447

journal_volume

52

pub_type

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