Case-finding for alpha1-antitrypsin deficiency in Kazakh patients with COPD

Ardak N. Zhumagaliyeva, Stefania Ottaviani, Timm Greulich, Marina Gorrini, Claus Franz Vogelmeier, Ludmila Karazhanova, Gulmira Nurgazina, Annalisa De Silvestri, Victor Kotke, Valentina Barzon

3 more authors

Michele Zorzetto, Angelo Guido Corsico, Ilaria Ferrarotti

2017

Full text Open access: Gold Metadata (CSL-JSON)
DOI 10.1186/s40248-017-0104-5
Data confidence 70 medium
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Abstract

BACKGROUND: Alpha-1-antitrypsin deficiency (AATD) is an under-diagnosed condition in patients with chronic obstructive pulmonary disease (COPD). The aim of this study was to screen for AATD in Kazakh patients with COPD using dried blood spot specimens. METHODS: The alpha1-antitrypsin (AAT) concentration was determined by nephelometry, PCR was used to detect PiS and PiZ alleles; and isoelectric focusing was used to confirm questionable genotype results and detect rare AAT variants. RESULTS: To this aim, 187 Kazakh subjects with COPD were recruited. Blood samples were collected as dried blood spot. Genotyping of 187 samples revealed 3 (1.6%) PI*MZ and 1 (0.53%) PI*MS, Phenotyping identified also two sample (1.1%) with phenotype PiMI. Allelic frequencies of pathological mutations Z, S and I resulted 0.8%, 0.3%, 0.5%, respectively, in COPD Kazakh population. CONCLUSION: This study proved that AATD is present in the Kazakh population. These results support the general concept of targeted screening for AAT deficiency in countries like Kazakhstan, with a large population of COPD patients and low awareness among care-givers about this genetic condition.