Alpha-1 Antitrypsine - Testing for S and Z variants of the SERPINA1 gene
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A1BM
Synonyms
- Genotyping of S and Z alpha-1-antitrypsin variants
- OMIM code : #613490 / *107400
- p.Glu264Val mutation and p.Glu342Lys mutation
- Pi - Protease inhibitor - genotyping
Specialty
Genetics
Clinical significance
Alpha-1-antitrypsin (A1AT) is an inflammatory glycoprotein which serves to limit the amount of cell damage and death at the focus of the reaction. A set of different isoenzymes exist which constitute the Pi (Protease inhibitor) system and which can be distinguished on the basis of isoelectric focusing. Phenotype M is the most common and certain variants (S and to an even greater extent Z) are associated with A1AT deficiency which can lead to the development of panacinar emphysema and liver disease.
Preanalytics
- 5 mL :
- 5 mL EDTA whole blood: chilled and 1 mL serum: chilled
- A tube specifically for this analysis : No
Further information
According to regulation, each request must ALWAYS be accompanied by a consent form signed by the patient and the prescribing pathologist
Sample must be refrigerated if transport is > 48 hours
Enclose the specific B12-INTGB request form: Molecular Genetics
Documents to download
Methodology
LAMP PCR
Turnaround time
18 days
Biomnis Lyon