A role of single nucleotide polymorphism in TNF, NOS3 and MMP9 genes at the risk of developing neonatal pneumonia

Abstract

Neonatal pneumonia is one of the most common causes of infant mortality. Moreover, the diagnosis of this pathology represents a difficult task and requires to seek for additional solutions in clinical and laboratory practice. One of the current and promising ways to diagnose rerlies on search of predictive markers among the innate and adaptive immunity genes involved in disease pathogenesis. We used bioinformatics analysis to select genes playing essential role developing neonatal pneumonia. Next, cord blood samples collected from 234 newborns were examined by real-time polymerase chain reaction for nine polymorphic markers in the TNF, IL10, IL17A, IL17F, IL6, NOS3, and MMP9 genes. The results of statistical analysis showed that heterozygous genotypes in the MMP9 and TNF genes were associated with the risk of developing early neonatal pneumonia, and also the protective role of homozygotes AA in the MMP9 gene and GG in the TNF gene. A search for associations with a risk of intrauterine pneumonia revealed an unfavorable role for heterozygous genotypes in the NOS3 and MMP9 genes. Thus, due to difficulties in diagnosis or in case of developing neonatal pneumonia, it may be recommended to add genetic analysis for assessing polymorphic markers in the MMP9 (rs17576), TNF (rs1800629) and NOS3 (rs1549758) genes along with standard test assays.