The relationship between left ventricular hypervoltage and CYP11B2 (344T/C) polymorphism in Keriyans

Area of Science:

• Human adaptation to extreme environments
• Human genetics
• Cardiovascular physiology

Background:

• The Keriyan population, or 'desert people', inhabit the extreme arid conditions of the Taklimakan Desert.
• Their physiological adaptations to this environment are not well understood.
• This study investigates a potential genetic adaptation related to cardiovascular function.

Purpose of the Study:

• To explore the association between the C-344T polymorphism in the aldosterone synthase gene (CYP11B2) promoter region and resting electrocardiogram (ECG) left ventricular hypervoltage.
• To understand the adaptive mechanisms of the Keriyan population in an extreme desert environment.

Main Methods:

• Recruited 503 Keriyans from the Taklimakan Desert and 237 Uighur controls.
• Compared physical fitness, ECGs, and biochemistry between groups.
• Genotyped the C-344T single nucleotide polymorphism (SNP) in the CYP11B2 promoter using PCR-RFLP and sequencing.

Main Results:

• Keriyans exhibited a significantly higher incidence of ECG left ventricular hypervoltage compared to controls (p < 0.001).
• The frequency of the 344T allele was higher in Keriyans (OR = 1.48).
• The 344T allele was associated with a higher odds ratio for ECG left ventricular hypervoltage in Keriyans (OR = 1.557).

Conclusions:

• The C-344T polymorphism in the CYP11B2 gene promoter is associated with ECG left ventricular hypervoltage in the Keriyan population.
• This suggests a potential genetic adaptation to the extreme desert environment.