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Alpha1 antitrypsin phenotypes in Northern Ireland
Annals of Human Genetics
|January 1, 1975
Summary
This study analyzed alpha1 antitrypsin (AAT) levels and phenotypes in 1000 Northern Irish adults. Phenotype M was most common, with varying AAT levels across different phenotypes, showing significant overlap.
Area of Science:
- Biochemistry
- Human Genetics
- Population Health
Background:
- Alpha1 antitrypsin (AAT) is a crucial proteinase inhibitor.
- Understanding AAT phenotypes and serum levels is vital for population health studies.
- Genetic variations in AAT can impact health outcomes.
Purpose of the Study:
- To determine the prevalence of different alpha1 antitrypsin (AAT) phenotypes in a healthy Northern Irish adult population.
- To analyze the correlation between AAT phenotypes and serum AAT levels.
- To identify any anomalous AAT patterns in the studied cohort.
Main Methods:
- Serum samples were collected from 1000 healthy adults in Northern Ireland.
- Alpha1 antitrypsin (AAT) phenotypes were identified.
- Serum AAT levels were quantified and compared across different phenotypes.
Main Results:
- The Pi phenotype M was predominant (87.8%), followed by Pi MS (7.3%) and Pi MZ (3.5%).
- Rarer phenotypes (FM, IM, SZ, Z--) were found at lower frequencies.
- Significant overlap in AAT levels was observed across phenotypes, though mean levels varied (e.g., Pi MS at 81%, Pi MZ at 61% of Pi M).
- Two anomalous patterns were detected in ten subjects.
Conclusions:
- The study establishes baseline AAT phenotype frequencies in Northern Ireland.
- AAT serum levels show a quantitative relationship with phenotype, despite overlap.
- Further investigation into anomalous AAT patterns is warranted.
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