Details

Autor(en) / Beteiligte

• Le Scouarnec, Solena
• Bhasin, Naina
• Vieyres, Claude
• Hund, Thomas J
• Cunha, Shane R
• Koval, Olha
• Marionneau, Celine
• Chen, Biyi
• Wu, Yuejin
• Demolombe, Sophie
• Song, Long-Sheng
• Le Marec, Hervé
• Probst, Vincent
• Schott, Jean-Jacques
• Anderson, Mark E
• Mohler, Peter J

Titel

Dysfunction in ankyrin-B-dependent ion channel and transporter targeting causes human sinus node disease

Ist Teil von

• Proceedings of the National Academy of Sciences - PNAS, 2008-10, Vol.105 (40), p.15617-15622

Ort / Verlag

United States: National Academy of Sciences

Erscheinungsjahr

2008

Quelle

MEDLINE

Beschreibungen/Notizen

• The identification of nearly a dozen ion channel genes involved in the genesis of human atrial and ventricular arrhythmias has been critical for the diagnosis and treatment of fatal cardiovascular diseases. In contrast, very little is known about the genetic and molecular mechanisms underlying human sinus node dysfunction (SND). Here, we report a genetic and molecular mechanism for human SND. We mapped two families with highly penetrant and severe SND to the human ANK2 (ankyrin-B/AnkB) locus. Mice heterozygous for AnkB phenocopy human SND displayed severe bradycardia and rate variability. AnkB is essential for normal membrane organization of sinoatrial node cell channels and transporters, and AnkB is required for physiological cardiac pacing. Finally, dysfunction in AnkB-based trafficking pathways causes abnormal sinoatrial node (SAN) electrical activity and SND. Together, our findings associate abnormal channel targeting with human SND and highlight the critical role of local membrane organization for sinoatrial node excitability.