Antenatal Testing for Cystic Fibrosis in Cuba, 1988-2011
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| Format: | Artículo científico |
| Sprache: | en |
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Medical Education Cooperation with Cuba
2014
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| _version_ | 1876429755437285376 |
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| author | Teresa Collazo |
| author_facet | Teresa Collazo |
| contents | Antenatal Testing for Cystic Fibrosis in Cuba, 1988-2011 Teresa Collazo Ixchel López Yulia Clark Yaixa Piloto Laura González Manuel Gómez Marileivis García Lidice Reyes Fidel Rodríguez Medicina Cuba CFTR protein Cystic fibrosis molecular markers antenatal diagnosis INTRODUCTION Cystic fibrosis is a multisystem autosomal recessive disease with wide variability in clinical severity. It is incurable and characterized by elevated and premature mortality, as well as poor quality of life. Its frequency, lethality and devastating impact on both the physical and psychological wellbeing of patients and their families, make it a serious health problem. Its frequency in Cuba is 1 in 9862 live births, where marked molecular heterogeneity of the CFTR gene makes molecular diagnosis difficult. Six mutations have been identified that together enable molecular characterization of only 55.5% of cystic fibrosis chromosomes. This paper presents national results of antenatal diagnostic testing, using direct and indirect methods, for detection of cystic fibrosis. OBJECTIVE Characterize the Cuban public health system’s experience with antenatal molecular testing for cystic fibrosis from 1988 through 2011. METHODS A retrospective descriptive study was conducted with results of antenatal diagnostic testing of amniotic fluid, performed nationwide from 1988 through 2011, for 108 fetuses of couples with some risk of having children affected by cystic fibrosis, who requested testing. Polymerase chain reaction detected mutations p.F508del, p.G542X, p.R1162X, p.R334W, p.R553X and c.3120+1G>A, and markers XV2C and KM19. Data were analyzed using absolute frequencies and percentages, and presented in tables. RESULTS For 93 cases (86.1%), testing for cystic fibrosis was done using direct analysis of mutations p.F508del, p.G542X, p.R1162X, p.R334W, p.R553X and c.3120+1G>A; five cases (4.6%) were tested indirectly using markers XV2C/Taq I and KM19/Pst I; and 10 (9.3%) were tested using a combination of the two methods. A total of 72 diagnoses (66.7% of studies done) were concluded, of which there were 20 healthy fetuses, 16 affected, 27 carrier, and 9 who were either healthy or carriers of an unknown mutation. CONCLUSIONS Direct or indirect molecular study was successfully used in over half of antenatal tests requested by couples throughout Cuba at risk of having children affected by cystic fibrosis, which is of great social value because of CF’s burden on affected persons and their families. 2014 artículo científico 1555-7960 https://www.redalyc.org/articulo.oa?id=437542098005 en http://www.redalyc.org/revista.oa?id=4375 MEDICC Review application/pdf Medical Education Cooperation with Cuba MEDICC Review (Estados Unidos de América) Num.3-4 Vol.16 |
| format | Artículo científico |
| id | redalyc_437542098005 |
| institution | Redalyc |
| language | en |
| publishDate | 2014 |
| publisher | Medical Education Cooperation with Cuba |
| spellingShingle | Antenatal Testing for Cystic Fibrosis in Cuba, 1988-2011 Teresa Collazo Medicina Cuba CFTR protein Cystic fibrosis molecular markers antenatal diagnosis Antenatal Testing for Cystic Fibrosis in Cuba, 1988-2011 Teresa Collazo Ixchel López Yulia Clark Yaixa Piloto Laura González Manuel Gómez Marileivis García Lidice Reyes Fidel Rodríguez Medicina Cuba CFTR protein Cystic fibrosis molecular markers antenatal diagnosis INTRODUCTION Cystic fibrosis is a multisystem autosomal recessive disease with wide variability in clinical severity. It is incurable and characterized by elevated and premature mortality, as well as poor quality of life. Its frequency, lethality and devastating impact on both the physical and psychological wellbeing of patients and their families, make it a serious health problem. Its frequency in Cuba is 1 in 9862 live births, where marked molecular heterogeneity of the CFTR gene makes molecular diagnosis difficult. Six mutations have been identified that together enable molecular characterization of only 55.5% of cystic fibrosis chromosomes. This paper presents national results of antenatal diagnostic testing, using direct and indirect methods, for detection of cystic fibrosis. OBJECTIVE Characterize the Cuban public health system’s experience with antenatal molecular testing for cystic fibrosis from 1988 through 2011. METHODS A retrospective descriptive study was conducted with results of antenatal diagnostic testing of amniotic fluid, performed nationwide from 1988 through 2011, for 108 fetuses of couples with some risk of having children affected by cystic fibrosis, who requested testing. Polymerase chain reaction detected mutations p.F508del, p.G542X, p.R1162X, p.R334W, p.R553X and c.3120+1G>A, and markers XV2C and KM19. Data were analyzed using absolute frequencies and percentages, and presented in tables. RESULTS For 93 cases (86.1%), testing for cystic fibrosis was done using direct analysis of mutations p.F508del, p.G542X, p.R1162X, p.R334W, p.R553X and c.3120+1G>A; five cases (4.6%) were tested indirectly using markers XV2C/Taq I and KM19/Pst I; and 10 (9.3%) were tested using a combination of the two methods. A total of 72 diagnoses (66.7% of studies done) were concluded, of which there were 20 healthy fetuses, 16 affected, 27 carrier, and 9 who were either healthy or carriers of an unknown mutation. CONCLUSIONS Direct or indirect molecular study was successfully used in over half of antenatal tests requested by couples throughout Cuba at risk of having children affected by cystic fibrosis, which is of great social value because of CF’s burden on affected persons and their families. 2014 artículo científico 1555-7960 https://www.redalyc.org/articulo.oa?id=437542098005 en http://www.redalyc.org/revista.oa?id=4375 MEDICC Review application/pdf Medical Education Cooperation with Cuba MEDICC Review (Estados Unidos de América) Num.3-4 Vol.16 |
| title | Antenatal Testing for Cystic Fibrosis in Cuba, 1988-2011 |
| topic | Medicina Cuba CFTR protein Cystic fibrosis molecular markers antenatal diagnosis |
| url | https://www.redalyc.org/articulo.oa?id=437542098005 |