Apolipoprotein A-IV polymorphism in Singapore ethnic groups

Area of Science:

• Biochemistry
• Population Genetics
• Human Genetics

Background:

• Apolipoprotein A-IV (Apo A-IV) plays a role in lipid metabolism.
• Understanding Apo A-IV polymorphism is crucial for population-specific health insights.

Purpose of the Study:

• To investigate and compare serum Apo A-IV genetic polymorphism frequencies.
• To analyze ethnic variations in Apo A-IV allele distribution among Chinese, Indian, and Malay populations.

Main Methods:

• Serum samples from 627 individuals (455 Chinese, 127 Dravidian Indians, 45 Malays) were analyzed.
• Apo A-IV polymorphism was determined using established genetic techniques.
• Allele frequencies were calculated and compared across the ethnic groups.

Main Results:

• The Apo A-IV*2 allele frequency was significantly higher in Dravidian Indians (0.043) compared to Chinese (0.010) and Malays (0.011) (p < 0.001).
• Apo A-IV*3 frequency was approximately 0.02 across all studied ethnic groups.
• Apo A-IV*4 was observed at low frequencies (<0.01) in Chinese and Indian subjects.
• Phenotypic distribution for Apo A-IV was in Hardy-Weinberg equilibrium within each ethnic group.

Conclusions:

• Significant ethnic differences exist in Apo A-IV*2 allele frequencies.
• These findings contribute to understanding the genetic landscape of lipid-associated proteins in Asian populations.
• Apo A-IV polymorphism data can inform future research on cardiovascular health disparities.