A New SERPINA-1 Missense Mutation Associated with Alpha-1 Antitrypsin Deficiency and Bronchiectasis.
Lung
; 195(5): 679-682, 2017 10.
Article
in En
| MEDLINE
| ID: mdl-28668972
ABSTRACT
Alpha-1-antitrypsin deficiency (AATD) is a genetic condition caused by SERPINA1 mutations, which culminates into lower protease inhibitor activity in the serum and predisposes to emphysema. Clinical manifestations of AATD are often associated to ZZ (p.Glu342Lys) and SZ (p.Glu264Val) genotypes and less frequently to rare deficiency or null alleles in heterozygous and homozygous states. We report a case of a 52-year-old woman with bronchiectasis without other potential causes other than an electrophoresis that showed a decrease of alpha-1 globin band and AAT levels below the normal value (78 mg/dl; v.n. 90-200 mg/dl). No S or Z mutation was identified, but sequencing analysis found a novel missense variant Ile74Asn (c.221T > A) in heterozygous state on an M3 allele (Glu400Asp) in the exon 2 of the SERPINA-1gene, probably leading to a dysfunctional protein. This mutation has never been previously identified, and it is interesting to note the association with bronchiectasis in the absence of emphysema.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bronchiectasis
/
Alpha 1-Antitrypsin
/
Alpha 1-Antitrypsin Deficiency
/
Mutation, Missense
/
Lung
Type of study:
Diagnostic_studies
/
Prognostic_studies
/
Risk_factors_studies
Limits:
Female
/
Humans
/
Middle aged
Language:
En
Journal:
Lung
Year:
2017
Document type:
Article
Affiliation country:
Italia