Mutations in Ribonucleic Acid Binding Protein Gene Cause Familial Dilated Cardiomyopathy

Katharine M. Brauch, Margaret L. Karst, Kathleen J. Herron, Mariza De Andrade, Patricia Pellikka, Richard J. Rodeheffer, Virginia V. Michels, Timothy Mark Olson

Research output: Contribution to journalArticle

159 Citations (Scopus)

Abstract

Objectives: We sought to identify a novel gene for dilated cardiomyopathy (DCM). Background: DCM is a heritable, genetically heterogeneous disorder that remains idiopathic in the majority of patients. Familial cases provide an opportunity to discover unsuspected molecular bases of DCM, enabling pre-clinical risk detection. Methods: Two large families with autosomal-dominant DCM were studied. Genome-wide linkage analysis was used to identify a disease locus, followed by fine mapping and positional candidate gene sequencing. Mutation scanning was then performed in 278 unrelated subjects with idiopathic DCM, prospectively identified at the Mayo Clinic. Results: Overlapping loci for DCM were independently mapped to chromosome 10q25-q26. Deoxyribonucleic acid sequencing of affected individuals in each family revealed distinct heterozygous missense mutations in exon 9 of RBM20, encoding ribonucleic acid (RNA) binding motif protein 20. Comprehensive coding sequence analyses identified missense mutations clustered within this same exon in 6 additional DCM families. Mutations segregated with DCM (peak composite logarithm of the odds score >11.49), were absent in 480 control samples, and altered residues within a highly conserved arginine/serine (RS)-rich region. Expression of RBM20 messenger RNA was confirmed in human heart tissue. Conclusions: Our findings establish RBM20 as a DCM gene and reveal a mutation hotspot in the RS domain. RBM20 is preferentially expressed in the heart and encodes motifs prototypical of spliceosome proteins that regulate alternative pre-messenger RNA splicing, thus implicating a functionally distinct gene in human cardiomyopathy. RBM20 mutations are associated with young age at diagnosis, end-stage heart failure, and high mortality.

Original languageEnglish (US)
Pages (from-to)930-941
Number of pages12
JournalJournal of the American College of Cardiology
Volume54
Issue number10
DOIs
StatePublished - Sep 1 2009

Fingerprint

Dilated Cardiomyopathy
Carrier Proteins
RNA
Mutation
Genes
Missense Mutation
Exons
Spliceosomes
Familial dilated cardiomyopathy
Cardiomyopathies
Serine
Sequence Analysis
Arginine
Heart Failure
Chromosomes
Genome
Mortality
DNA

Keywords

  • dilated cardiomyopathy
  • genetics
  • linkage analysis
  • mutation
  • RBM20

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Mutations in Ribonucleic Acid Binding Protein Gene Cause Familial Dilated Cardiomyopathy. / Brauch, Katharine M.; Karst, Margaret L.; Herron, Kathleen J.; De Andrade, Mariza; Pellikka, Patricia; Rodeheffer, Richard J.; Michels, Virginia V.; Olson, Timothy Mark.

In: Journal of the American College of Cardiology, Vol. 54, No. 10, 01.09.2009, p. 930-941.

Research output: Contribution to journalArticle

Brauch, Katharine M. ; Karst, Margaret L. ; Herron, Kathleen J. ; De Andrade, Mariza ; Pellikka, Patricia ; Rodeheffer, Richard J. ; Michels, Virginia V. ; Olson, Timothy Mark. / Mutations in Ribonucleic Acid Binding Protein Gene Cause Familial Dilated Cardiomyopathy. In: Journal of the American College of Cardiology. 2009 ; Vol. 54, No. 10. pp. 930-941.
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AU - Pellikka, Patricia

AU - Rodeheffer, Richard J.

AU - Michels, Virginia V.

AU - Olson, Timothy Mark

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