Analysis of microdeletions in 22q11 in Colombian patients with congenital heart disease
Villegas, Victoria E.
Fonseca-Mendoza, Dora Janeth
Cardiac defects are the most frequent congenital malformations, with an incidence estimated between 4 and 12 per 1000 newborns. Their etiology is multifactorial and might be attributed to genetic predispositions and environmental factors. Since 1990 these types of pathologies have been associated with 22q11 microdeletion. In this study, the frequency of microdeletion 22q11 was determined in 61 patients with non-syndromic congenital heart disease. DNA was extracted from peripheral blood and TUPLE1 and STR D10S2198 genes were amplified by multiplex PCR and visualized in agarose gels. Gene content was quantified by densitometry. Three patients were found with microdeletion 22q11, representing a 4.9% frequency. This microdeletion was associated with two cases of Tetralogy of Fallot and a third case with atrial septal defect (ASD). In conclusion, the frequency for microdeletion 22q11 in the population analyzed was 4.9%. The cases that presented Teratology of Fallot had a frequency for this microdeletion of 7.4% and for ASD of 11.1%.
Article ; newborn ; congenital ; Chromosome deletion 22q11 ; atrial ; preschool ; human ; pair 22 ; Congenital heart disease ; Fallot tetralogy ; Genetic association ; Heart atrium septum defect ; Human ; Major clinical study ; Adolescent ; Adult ; Child ; Child ; Chromosome deletion ; Chromosomes ; Colombia ; Dna mutational analysis ; Female ; Gene frequency ; Genetic predisposition to disease ; Heart defects ; Heart septal defects ; Humans ; Infant ; Infant ; Male ; Tetralogy of fallot ; Young adult ; Atrial septal defects ; Congenital heart diseases ; Densitometry ; Microdeletion 22q11 ; Multiplex pcr ; Tetralogy of fallot ; Tuple 1 ;
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