• Register
Forgot Password

If you have forgotten your password you can enter your email here and get a temporary password sent to your email.


Leaving Community

Are you sure you want to leave this community? Leaving the community will revoke any permissions you have been granted in this community.


Human cardiomyopathy mutations induce myocyte hyperplasia and activate hypertrophic pathways during cardiogenesis in zebrafish.

To assess the effects during cardiac development of mutations that cause human cardiomyopathy, we modeled a sarcomeric gene mutation in the embryonic zebrafish. We designed morpholino antisense oligonucleotides targeting the exon 13 splice donor site in the zebrafish cardiac troponin T (tnnt2) gene, in order to precisely recapitulate a human TNNT2 mutation that causes hypertrophic cardiomyopathy (HCM). HCM is a disease characterized by myocardial hypertrophy, myocyte and myofibrillar disarray, as well as an increased risk of sudden death. Similar to humans with HCM, the morphant zebrafish embryos displayed sarcomere disarray and there was a robust induction of myocardial hypertrophic pathways. Microarray analysis uncovered a number of shared transcriptional responses between this zebrafish model and a well-characterized mouse model of HCM. However, in contrast to adult hearts, these embryonic hearts developed cardiomyocyte hyperplasia in response to this genetic perturbation. The re-creation of a human disease-causing TNNT2 splice variant demonstrates that sarcomeric mutations can alter cardiomyocyte biology at the earliest stages of heart development with distinct effects from those observed in adult hearts despite shared transcriptional responses.

Pubmed ID: 21245263


  • Becker JR
  • Deo RC
  • Werdich AA
  • Panàkovà D
  • Coy S
  • MacRae CA


Disease models & mechanisms

Publication Data

May 11, 2011

Associated Grants

  • Agency: NHLBI NIH HHS, Id: K08 HL098361
  • Agency: NHLBI NIH HHS, Id: K08 HL098361-01A1
  • Agency: NHLBI NIH HHS, Id: K08 HL098361-02
  • Agency: NHLBI NIH HHS, Id: R01 HL109264
  • Agency: NHLBI NIH HHS, Id: R21 HL098938
  • Agency: NHLBI NIH HHS, Id: T32HL007208

Mesh Terms

  • Alternative Splicing
  • Amino Acid Sequence
  • Animals
  • Calcium
  • Cardiomyopathy, Hypertrophic
  • Embryo, Nonmammalian
  • Gene Expression Regulation, Developmental
  • Heart
  • Heart Ventricles
  • Humans
  • Hyperplasia
  • Mice
  • Molecular Sequence Data
  • Mutation
  • Myocardial Contraction
  • Myocytes, Cardiac
  • Oligonucleotides, Antisense
  • Organogenesis
  • Sarcomeres
  • Transcription, Genetic
  • Troponin T
  • Zebrafish
  • Zebrafish Proteins