KCNA4 Gene Variant is Auxiliary in Endurance Running Performance Level

Area of Science:

• Genetics
• Sports Science
• Human Physiology

Background:

• Endurance performance is a complex trait influenced by genetic and environmental factors.
• Identifying specific genes associated with elite athletic performance can provide insights into physiological adaptations.
• The potassium voltage-gated channel shaker related subfamily member 4 (KCNA4) gene is a potential candidate for influencing muscle function and energy metabolism.

Purpose of the Study:

• To investigate the association between the KCNA4 gene rs1323860 (C/T transition) polymorphism and endurance performance in Hispanic male marathon runners.
• To determine if genotypic and allelic frequencies of KCNA4 rs1323860 differ between elite and sub-elite marathon runners.

Main Methods:

• Observational genetic epidemiology study using a case-control design.
• Recruitment of 1876 Hispanic male marathon runners, categorized into fast (top 3rd percentile) and slow (lowest 3rd percentile) groups.
• Genomic DNA extraction from blood samples, followed by polymerase chain reaction amplification of the KCNA4 rs1323860 single nucleotide polymorphism (SNP).

Main Results:

• Genotype and allele frequencies of KCNA4 rs1323860 showed a statistically significant difference between fast and slow marathon runners (P<0.01).
• The C allele was found to be 1.33 times more prevalent in the fast marathon runner group (cases) compared to the slow group (controls) (95% CI; 1.17, 1.51; P<0.001).
• Observed genotype frequencies adhered to Hardy-Weinberg equilibrium in both groups.

Conclusions:

• The KCNA4 gene rs1323860 (C/T transition) is significantly associated with endurance running performance in Hispanic male marathon runners.
• This genetic variant appears to be an auxiliary factor in the complex phenotype of endurance performance.
• Findings suggest a potential role for KCNA4 in the genetic architecture of elite endurance athleticism.