Alpha-1-antitrypsin subtypes in Polish newborns

Area of Science:

• Genetics
• Biochemistry
• Population Studies

Background:

• Alpha-1-antitrypsin (AAT) deficiency is a genetic disorder that can lead to lung and liver disease.
• Understanding the distribution of AAT phenotypes is crucial for assessing genetic predisposition and informing public health strategies.
• Previous studies have established AAT allele frequencies in various European populations, but data for Poland were limited.

Purpose of the Study:

• To determine the frequencies of Alpha-1-antitrypsin (AAT) phenotypes in a cohort of 741 Polish newborns.
• To compare the observed AAT allele frequencies in Poland with those reported in other European populations.
• To contribute to the understanding of AAT genetic variation across Europe.

Main Methods:

• Umbilical cord serum samples from 741 Polish newborns were collected.
• Isoelectric focusing (IEF) was employed to analyze the Alpha-1-antitrypsin (AAT) phenotypes.
• Allele frequencies were calculated based on the IEF results.

Main Results:

• The most frequent AAT allele observed was PI*M1 (0.7199), followed by PI*M2 (0.1613) and PI*M3 (0.0965).
• Less common alleles included PI*S (0.0094), PI*Z (0.0067), and a group of rare variants (PI*Var(F,I,L)) (0.0060).
• The determined allele frequencies were compared with existing data from other European populations.

Conclusions:

• The study established the genetic profile of Alpha-1-antitrypsin (AAT) in a representative sample of the Polish newborn population.
• The findings suggest a distinct pattern of AAT allele frequencies in Poland compared to some other European regions.
• This data is valuable for epidemiological studies and clinical considerations related to AAT deficiency in Poland and Europe.