Oxidative Stress and Catalase Gene.

Area of Science:

• Genetics
• Biochemistry
• Population Studies

Background:

• The catalase (CAT) gene plays a crucial role in cellular defense against oxidative stress.
• Polymorphisms in the CAT gene, such as the -262C>T variant (rs1001179), may influence enzyme activity and susceptibility to oxidative damage.
• Understanding ethnic variations in these polymorphisms is important for population genetics and health research.

Purpose of the Study:

• To investigate the allele and genotype frequencies of the CAT gene -262C>T polymorphism in Russian and Buryat adolescent populations.
• To examine the association between this CAT gene polymorphism and the concentration of diene conjugates, a marker of lipid peroxidation.

Main Methods:

• Genotyping of the CAT gene -262C>T polymorphism (rs1001179) using established molecular techniques.
• Quantification of diene conjugate levels in serum or plasma samples.
• Statistical analysis to compare allele/genotype frequencies between ethnic groups and to assess correlations.

Main Results:

• Significant differences in the frequency of the -262T allele were observed between Russian (28.31%) and Buryat (16.84%) adolescents (p<0.01).
• A significant correlation was found between the CAT gene -262C>T polymorphism and the concentration of diene conjugates in both ethnic groups.
• Individuals with the TT-genotype exhibited lower levels of diene conjugates compared to those with CT- and CC-genotypes.

Conclusions:

• The CAT gene -262C>T polymorphism exhibits distinct frequencies in Russian and Buryat adolescents.
• This polymorphism is associated with variations in diene conjugate levels, suggesting a potential role in oxidative stress modulation.
• The findings highlight the importance of considering ethnic background in genetic association studies related to oxidative stress markers.