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[Detection of alpha-1 antitrypsin deficiency: A study on patients diagnosed with chronic obstructive pulmonary disease in primary health care].
Semergen 2017 May
The prevalence of chronic obstructive pulmonary disease (COPD) in Spain is 10.2%. Although tobacco is the main aetiological factor, biomass smoke exposure and alpha-1 antitrypsin deficiency (AATD) have also been related to its development. AATD is a genetic condition which could be causing 2-3% of COPD cases. The aim of this cross-sectional descriptive study was to exclude the existence of AATD in a population of COPD patients from CS Culleredo, A Coruña. The thick blood drop test on blotting paper, as well as the analysis of the mutations PI*S and PI*Z of the gene SERPINA 1 by the analysis of denaturing gradients after simultaneous amplification related to PCR (polymerase chain reaction). The study population included 80 patients between 40-80 years old, of whom 30% were carriers of a deficient allele (heterozygous), and 80% of them were the allele PiS. Only one PiSZ (1.25%) individual and no PiZZ was detected. This represents an allelic frequency of 3.1% (PiZ), and 13.1% (PiS). The detected allelic frequencies are higher than previously reported in the Spanish population. Severe AATD has been excluded in 98.75% of the study population. The Pi*SZ patient has been diagnosed in an early stage of the disease. We have also achieved one of the quality indicators recommended by GesEPOC. Our area has shown a high PiS and PiZ frequency, thus our study could be used as a reference for further research in the Galician population.
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