TY - JOUR
T1 - PLN-encoded phospholamban mutation in a large cohort of hypertrophic cardiomyopathy cases
T2 - Summary of the literature and implications for genetic testing
AU - Landstrom, Andrew P.
AU - Adekola, Babatunde A.
AU - Bos, J. Martijn
AU - Ommen, Steve R.
AU - Ackerman, Michael J.
N1 - Funding Information:
Cohort demographics, where appropriate, were expressed as mean ± SD. The analyses were performed with support from the Mayo Clinic Windland Smith Rice Comprehensive Sudden Cardiac Death Program , a Leducq Fondation program grant “Alliance for Calmodulin Kinase II Signaling in Heart Disease,” and the National Institutes of Health 1PO1HL094291 . The authors are solely responsible for the design and content of this study, all study analyses, the drafting and editing of the paper, and its final contents.
PY - 2011/1
Y1 - 2011/1
N2 - Background: Hypertrophic cardiomyopathy (HCM) is a major cause of sudden death in young athletes and one of the most common inherited cardiovascular diseases, affecting 1 in 500 individuals. Often viewed as a disease of the cardiac sarcomere, mutations in genes encoding myofilament proteins are associated with disease pathogenesis. Despite a clinically available genetic test, a significant portion of HCM patients remain genetically unexplained. We sought to determine the spectrum and prevalence of mutations in PLN-encoded phospholamban in a large cohort of HCM cases as a potential cause of mutation-negative HCM. Methods: Comprehensive genetic interrogation of the promoter and coding region of PLN was conducted using polymerase chain reaction, denaturing high-performance liquid chromatography, and direct DNA sequencing. Results: One L39X nonsense mutation was identified in 1 of 1,064 HCM proband cases with a family history of HCM, previously found to be negative for the current HCM genetic test panel. This mutation cosegregated with incidence of HCM in a multigenerational family. Compared with similar studies, we identified an overall yield of PLN-HCM mutations of 0.65%, similar to 3 genes that are part of current HCM genetic test panels. We did not observe any PLN coding sequence genetic variation in 600 reference alleles. Conclusions: Overall, mutations in PLN are rare in frequency, yet the small size of the genetic locus may make it amenable to inclusion on HCM gene test panels, especially because the frequency of background genetic variation among otherwise healthy subjects appears negligible. The exact role of mutations in PLN and other calcium-handling proteins in the development of HCM warrants further investigation.
AB - Background: Hypertrophic cardiomyopathy (HCM) is a major cause of sudden death in young athletes and one of the most common inherited cardiovascular diseases, affecting 1 in 500 individuals. Often viewed as a disease of the cardiac sarcomere, mutations in genes encoding myofilament proteins are associated with disease pathogenesis. Despite a clinically available genetic test, a significant portion of HCM patients remain genetically unexplained. We sought to determine the spectrum and prevalence of mutations in PLN-encoded phospholamban in a large cohort of HCM cases as a potential cause of mutation-negative HCM. Methods: Comprehensive genetic interrogation of the promoter and coding region of PLN was conducted using polymerase chain reaction, denaturing high-performance liquid chromatography, and direct DNA sequencing. Results: One L39X nonsense mutation was identified in 1 of 1,064 HCM proband cases with a family history of HCM, previously found to be negative for the current HCM genetic test panel. This mutation cosegregated with incidence of HCM in a multigenerational family. Compared with similar studies, we identified an overall yield of PLN-HCM mutations of 0.65%, similar to 3 genes that are part of current HCM genetic test panels. We did not observe any PLN coding sequence genetic variation in 600 reference alleles. Conclusions: Overall, mutations in PLN are rare in frequency, yet the small size of the genetic locus may make it amenable to inclusion on HCM gene test panels, especially because the frequency of background genetic variation among otherwise healthy subjects appears negligible. The exact role of mutations in PLN and other calcium-handling proteins in the development of HCM warrants further investigation.
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U2 - 10.1016/j.ahj.2010.08.001
DO - 10.1016/j.ahj.2010.08.001
M3 - Article
C2 - 21167350
AN - SCOPUS:78650272451
SN - 0002-8703
VL - 161
SP - 165
EP - 171
JO - American heart journal
JF - American heart journal
IS - 1
ER -