Maternal Genetic Variants and Gestational Duration: A Replication Study in a Japanese Cohort

Area of Science:

• Human Genetics
• Reproductive Biology
• Population Studies

Background:

• Gestational duration is a critical factor in maternal and infant health outcomes.
• Previous studies identified maternal genetic variants associated with gestational duration in European populations.
• The generalizability of these findings to other ancestries, such as Japanese populations, remains largely unexplored.

Purpose of the Study:

• To investigate whether maternal genetic variants previously linked to gestational duration in European-ancestry populations are also associated with gestational duration in Japanese women.
• To explore potential population-specific genetic effects on pregnancy length.

Main Methods:

• Analysis of 347 Japanese women from a community-based cohort.
• Genotyping of four single-nucleotide polymorphisms (SNPs): rs2946169 (near EBF1), rs2955117 (EEFSEC), rs12037376 (WNT4), and rs9861425 (ADCY5).
• Linear regression analysis adjusted for maternal age, with a Bonferroni correction for multiple testing (p < 0.0125).

Main Results:

• The mean gestational age at first delivery was 39.4 weeks.
• A nominal association was observed between the rs2946169 T allele (near EBF1) and shorter gestation (p = 0.021), but this did not meet the Bonferroni-corrected significance threshold.
• No significant associations were found for the other three SNPs (rs2955117, rs12037376, rs9861425).

Conclusions:

• Suggestive evidence indicates a potential relationship between maternal genetic variation at the EBF1 locus and gestational duration in Japanese women.
• The observed association requires further validation in larger studies due to the lack of statistical significance after multiple-testing correction.
• Clarifying population-specific genetic influences on gestational duration is crucial for a comprehensive understanding.