tailieunhanh - Báo cáo y học: " The prevalence of alpha-1 antitrypsin deficiency in Ireland"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học 'Respiratory Research cung cấp cho các bạn kiến thức về ngành y đề tài: " The prevalence of alpha-1 antitrypsin deficiency in Ireland. | Carroll et al. Respiratory Research 2011 12 91 http content 12 1 91 RESPIRATORY RESEARCH RESEARCH Open Access The prevalence of alpha-1 antitrypsin deficiency in Ireland 1 s 1 A z-s z- 11 2 2 Tomás P Carroll Catherine A O Connor Olwen Floyd Joseph McPartlin Dermot P Kelleher Geraldine O Brien1 Borislav D Dimitrov3 Valerie B Morris1 Clifford C Taggart4 and Noel G McElvaney1 Abstract Background Alpha-1 antitrypsin deficiency AATD results from mutations in the SERPINA1 gene and classically presents with early-onset emphysema and liver disease. The most common mutation presenting with clinical evidence is the Z mutation while the S mutation is associated with a milder plasma deficiency. AATD is an underdiagnosed condition and the World Health Organisation recommends targeted detection programmes for AATD in patients with chronic obstructive pulmonary disease COPD non-responsive asthma cryptogenic liver disease and first degree relatives of known AATD patients. Methods We present data from the first 3 000 individuals screened following ATS ERS guidelines as part of the Irish National Targeted Detection Programme INTDP . We also investigated a DNA collection of 1 100 individuals randomly sampled from the general population. Serum and DNA was collected from both groups and mutations in the SERPINA1 gene detected by phenotyping or genotyping. Results The Irish National Targeted Detection Programme identified 42 ZZ 44 SZ 14 SS 430 MZ 263 MS 20 IX and 2 rare mutations. Analysis of 1 100 randomly selected individuals identified 113 MS 46 MZ 2 SS and 2 SZ genotypes. Conclusion Our findings demonstrate that AATD in Ireland is more prevalent than previously estimated with Z and S allele frequencies among the highest in the world. Furthermore our targeted detection programme enriched the population of those carrying the Z but not the S allele suggesting the Z allele is more important in the pathogenesis of those conditions targeted by the detection .

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