title: Phenotypes of alpha-1-antitrypsin in intrinsic asthma and ASA-triad patients.
abstract: The frequency of presence of various phenotypes of alpha 1-antitrypsin was studied in 31 patients with intrinsic asthma and 11 with ASA-Triad, and compared to a group of 200 people representative of the general population. The MZ and SZ phenotype is more frequent in intrinsic asthmatics (p < 0.00001) and MZ in ASA-Triad (p < 0.0005) than in the control group. No differences were found between the intrinsic asthmatics and ASA-Triad. All the patients were divided into groups according to their clinical characteristics and an increase of the MZ phenotype was observed (p < 0.001) in patients with: nasal polyposis, intolerance to non-steroidal anti-inflammatories, a family history of atopy and peripheral eosinophilia (p < 0.01). Alpha-1-antitrypsin deficiency could be important in the pathogenesis of inflammatory processes and in the clinical manifestations characteristic of patients with intrinsic asthma and ASA-Triad.
authors.affiliation: Allergy Treatment Unit, Mérida Hospital, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Prados
authors.forename: F J
authors.initials: FJ
authors.lastname: Monteseirín
authors.forename: M I
authors.initials: MI
authors.lastname: Carranco
authors.forename: R
authors.initials: R
authors.lastname: Aragón
authors.forename: A
authors.initials: A
authors.lastname: Conde
authors.forename: J
authors.initials: J
authors.lastname: Conde
mesh_terms: D000328:Adult; D000368:Aged; D000483:Alleles; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects*; D001249:Asthma / Q000235:genetics*; D004802:Eosinophilia / Q000150:complications; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D006969:Hypersensitivity, Immediate / Q000150:complications; D008297:Male; D008875:Middle Aged; D009298:Nasal Polyps / Q000235:genetics*; D010641:Phenotype; D013577:Syndrome; D000515:alpha 1-Antitrypsin / Q000235:genetics*; D019896:alpha 1-Antitrypsin Deficiency
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D000515:alpha 1-Antitrypsin