ABSTRACT
OBJECTIVE@#To explore the genetic basis for a patient with aortic root aneurysm and valve insufficiency.@*METHODS@#The patient was subjected to whole exome sequencing (WES) with a focus on the analysis of genes related to aortic aneurysm and other genetic diseases involving the cardiovascular system. Suspected pathogenic site was validated by Sanger sequencing of the patient and his family members.@*RESULTS@#WES has revealed a heterozygous c.830T>C variant (NM_001130916.3) in the patient, which was not detected among healthy members of his family. SIFT, PolyPhen2 and Mutation Taster predicted the variant to be disease causing, resulting in destruction of the structure and function of the TGFBR1 protein. Based on the American College of Medical Genetics and Genomics (ACMG) guidelines, the variant was predicted to be likely pathogenic (PM1+PM2+PM6+PP3+PP4).@*CONCLUSION@#The c.830T>C variant of the TGFBR1 gene probably underlay the disease in the proband. Above finding has enriched the spectrum of TGFBR1 gene variants in Chinese population.
Subject(s)
Humans , China , Echocardiography , Loeys-Dietz Syndrome/genetics , Mutation , Pedigree , Receptor, Transforming Growth Factor-beta Type I/genetics , Exome SequencingABSTRACT
El síndrome de Loeys-Dietz es una enfermedad genética autosómica dominante caracterizada por aneurismas aórticos, tortuosidad arterial generalizada, hipertelorismo y úvula bifida o paladar hendido. La complicación cardiovascular más grave es la disección aórtica. Se presentan cuatro casos familiares de este síndrome en tres generaciones, todos con dilatación aórtica grave, y se describen sus aspectos diagnósticos, indicación y tratamiento quirúrgico, como así también pautas de seguimiento.
Loeys-Dietz Syndrome is an autosomal dominant disease with aortic aneurysms, arterial tortuosity with hypertelorism and bifid uvula. We describe four familial cases within three generations. The diagnosis, surgical management and followup will be addressed.