RESUMO
In order to analyze the effect of the two different versions of the cluster of differentiation 14 (CD14) receptor recognizing gene on survival, we determined the -260C>T single nucleotide polymorphism (SNP) frequencies in 514 critically ill patients. We compared the -260TT homozygotes with -260C allele carriers (-260CC and -260CT genotypes) and we demonstrated--260TT patients had the highest survival rate (82% vs 64%; p < 0.001; OR = 2.52, 95% CI = 1.43-4.46). We performed binary logistic regression, incorporating both -260C>T genotype groups and the main clinical predictors to exclude other risk factors that could influence the outcome from critical illness: higher age, APACHE II score, and length of stay at hospital, and the occurrence of sepsis and septic shock were risk factors to Intensive Care Unit (ICU) patient's mortality, but the -260TT genotype was protective factor toward survival (p = 0.001; OR = 3.08 95%CI = 1.54-5.98). Among septic and septic shock patients, -260TT genotype was also protective factor toward survival (p = 0.001; OR = 3.11 95%CI = 1.63-6.66 to septic patients, and p = 0.001; OR = 3.80 95%CI = 1.68-8.58 to patients with septic shock). Our results and our hypothesis suggest that the higher -260TT genotype frequency in ICU survivor patients is possibly explained by a beneficial effect on innate immunity signaling.