Genetic Variability of Inflammation and Oxidative Stress Genes Affects Onset, Progression of the Disease and Survival of Patients with Amyotrophic Lateral Sclerosis.

Inflammation and oxidative stress are recognized as important contributors to amyotrophic lateral sclerosis (ALS) disease pathogenesis. Our aim was to evaluate the impact of selected single-nucleotide polymorphisms in genes involved in inflammation and oxidative stress on ALS susceptibility and modification. One-hundred-and-eighty-five ALS patients and 324 healthy controls were genotyped for nine polymorphisms in seven antioxidant and inflammatory genes using competitive allele-specific PCR. Logistic regression; nonparametric tests and survival analysis were used in the statistical analysis. Investigated polymorphisms were not associated with ALS susceptibility. Carriers of at least one polymorphic rs4880 T or rs1071676 C allele more often had bulbar ALS onset ( = 0.036 and = 0.039; respectively). rs1071676 was also associated with a higher rate of disease progression ( = 0.015). After adjustment for clinical parameters; carriers of two polymorphic rs1071676 C alleles had shorter survival (HR = 5.02; 95% CI = 1.92-13.16; = 0.001); while carriers of at least one polymorphic rs1001179 T allele had longer survival (HR = 0.68; 95% CI = 0.47-0.99; = 0.046). Our data suggest that common genetic variants in the antioxidant and inflammatory pathways may modify ALS disease. Such genetic information could support the identification of patients that may be responsive to the immune or antioxidant system-based therapies.