Ueda et al, Trafficking-defective HCN4 mutation in cardiac arrhythmia - 1 - Functional characterization of a trafficking-defective HCN4 mutation, D553N, associated with cardiac arrhythmia Running title: Trafficking-defective HCN4 mutation in cardiac arrhythmia

نویسندگان

  • Kazuo Ueda
  • Kazufumi Nakamura
  • Takeharu Hayashi
  • Natsuko Inagaki
  • Megumi Takahashi
  • Takuro Arimura
  • Hiroshi Morita
  • Yasushi Higashiuesato
  • Yuji Hirano
  • Michio Yasunami
  • Shuichi Takishita
  • Akira Yamashina
  • Tohru Ohe
  • Makoto Sunamori
  • Masayasu Hiraoka
  • Akinori Kimura
چکیده

1 Functional characterization of a trafficking-defective HCN4 mutation, D553N, associated with cardiac arrhythmia Running title: Trafficking-defective HCN4 mutation in cardiac arrhythmia Kazuo Ueda, Kazufumi Nakamura, Takeharu Hayashi, Natsuko Inagaki, Megumi Takahashi, Takuro Arimura, Hiroshi Morita, Yasushi Higashiuesato, Yuji Hirano, Michio Yasunami, Shuichi Takishita, Akira Yamashina, Tohru Ohe, Makoto Sunamori, Masayasu Hiraoka, and Akinori Kimura Department of Molecular Pathogenesis, Medical Research Institute, and Laboratory of Genome Diversity, School of Biomedical Science, Tokyo Medical and Dental University, Tokyo, Japan, Department of Cardiovascular Diseases, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan, Department of Thoracic and Cardiovascular Surgery, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan, Department of Cardiovascular Medicine, Okayama University, Graduate School of Medicine and Dentistry, Okayama, Japan, Second Department of Internal Medicine, Tokyo Medical University, Tokyo, Japan, Third Department of Internal Medicine, Faculty of Medicine, University of the Ryukyus, Okinawa, Japan

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The HCN4 channel mutation D553N associated with bradycardia has a C-linker mediated gating defect.

BACKGROUND/AIMS The D553N mutation located in the C-linker of the cardiac pacemaker channel HCN4 is thought to cause sino-atrial dysfunction via a pronounced dominant-negative trafficking defect. Since HCN4 mutations usually have a minor defect in channel gating, it was our aim to further characterize the disease causing mechanism of D553N. METHODS Fluorescence microscopy, FACS, TEVC and patc...

متن کامل

Familial inappropriate sinus tachycardia: a new chapter in the story of HCN4 channelopathies.

The sinoatrial node (SAN) contains a small number of pacemaker cells (PCs), specialized cardiomyocytes whose automatic firing triggers each heart beat. Autonomic and endocrine modulation of PC automaticity enables precise neurohormonal regulation of heart rate (HR) in accordance with physiological demand. While the cellular mechanisms that underlie HR regulation are complex and still actively d...

متن کامل

A novel mutation (T65P) in the PAS domain of the human potassium channel HERG results in the long QT syndrome by trafficking deficiency.

The congenital long QT syndrome is a cardiac disease characterized by an increased susceptibility to ventricular arrhythmias. The clinical hallmark is a prolongation of the QT interval, which reflects a delay in repolarization caused by mutations in cardiac ion channel genes. Mutations in the HERG (human ether-à-go-go-related gene KCNH2 can cause a reduction in I(Kr), one of the currents respon...

متن کامل

Point mutation in the HCN4 cardiac ion channel pore affecting synthesis, trafficking, and functional expression is associated with familial asymptomatic sinus bradycardia.

BACKGROUND The hyperpolarization-activated nucleotide-gated channel--HCN4 plays a major role in the diastolic depolarization of sinus atrial node cells. Mutant HCN4 channels have been found to be associated with inherited sinus bradycardia. METHODS AND RESULTS Sixteen members of a family with sinus bradycardia were evaluated. Evaluation included a clinical questionnaire, 12-lead ECGs, Holter ...

متن کامل

HCN4 provides a 'depolarization reserve' and is not required for heart rate acceleration in mice.

Cardiac pacemaking involves a variety of ion channels, but their relative importance is controversial and remains to be determined. Hyperpolarization-activated, cyclic nucleotide-gated (HCN) channels, which underlie the I(f) current of sinoatrial cells, are thought to be key players in cardiac automaticity. In addition, the increase in heart rate following beta-adrenergic stimulation has been a...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2004