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Lakdawala, Neal K., MD; Funke, Birgit H., PhD; Baxter, Samantha, MS, CGC; Cirino, Allison L., MS, CGC; Roberts, Amy E., MD; Judge, Daniel P., MD; Johnson, Nicole, MS, CGC; Mendelsohn, Nancy J., MD; Morel, Chantal, MD; Care, Melanie, MS, CGC; Chung, Wendy K., MD; Jones, Carolyn, MD, PhD; Psychogios, Apostolos, MD; Duffy, Elizabeth; Rehm, Heidi L., PhD; White, Emily, MS; Seidman, J.G., PhD; Seidman, Christine E., MD; Ho, Carolyn Y., MD
Journal of cardiac failure, 04/2012, Letnik: 18, Številka: 4Journal Article
Abstract Background Familial involvement is common in dilated cardiomyopathy (DCM) and >40 genes have been implicated in causing disease. However, the role of genetic testing in clinical practice is not well defined. We examined the experience of clinical genetic testing in a diverse DCM population to characterize the prevalence and predictors of gene mutations. Methods and Results We studied 264 unrelated adult and pediatric DCM index patients referred to 1 reference lab for clinical genetic testing. Up to 10 genes were analyzed ( MYH7 , TNNT2 , TNNI3 , TPM1 , MYBPC3 , ACTC , LMNA , PLN , TAZ , and LDB3 ), and 70% of patients were tested for all genes. The mean age was 26.6 ± 21.3 years, and 52% had a family history of DCM. Rigorous criteria were used to classify DNA variants as clinically relevant (mutations), variants of unknown clinical significance (VUS), or presumed benign. Mutations were found in 17.4% of patients, commonly involving MYH7 , LMNA , or TNNT2 (78%). An additional 10.6% of patients had VUS. Genetic testing was rarely positive in older patients without a family history of DCM. Conversely in pediatric patients, family history did not increase the sensitivity of genetic testing. Conclusions Using rigorous criteria for classifying DNA variants, mutations were identified in 17% of a diverse group of DCM index patients referred for clinical genetic testing. The low sensitivity of genetic testing in DCM reflects limitations in both current methodology and knowledge of DCM-associated genes. However, if mutations are identified, genetic testing can help guide family management.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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