نتایج جستجو برای: hyperpolarization activiated current if sino atrial node

تعداد نتایج: 1634876  

Journal: :British journal of pharmacology 1999
S Shibata K Ono T Iijima

1 The hyperpolarization-activated cation current (If) was recorded in single pacemaker cells of the porcine sino-atrial node, and the effects of genistein, an isoflavone inhibitor of tyrosine-specific protein kinases was investigated by the whole-cell patch clamp technique. 2 Genistein (20-500 microM) decreased If in a dose-dependent manner with an IC50 value of 62.3 microM and a maximum inhibi...

Journal: :Japanese Journal of Electrocardiology 1994

2016
Maria Novella Romanelli Laura Sartiani Alessio Masi Guido Mannaioni Dina Manetti Alessandro Mugelli Elisabetta Cerbai

Hyperpolarization-activated, cyclic nucleotide-gated (HCN) channels, the molecular correlate of the hyperpolarization-activated current (If/Ih), are membrane proteins which play an important role in several physiological processes and various pathological conditions. In the Sino Atrial Node (SAN) HCN4 is the target of ivabradine, a bradycardic agent that is, at the moment, the only drug which s...

Journal: :The Journal of General Physiology 2002
Annalisa Bucchi Mirko Baruscotti Dario DiFrancesco

"Funny" (f-) channels have a key role in generation of spontaneous activity of pacemaker cells and mediate autonomic control of cardiac rate; f-channels and the related neuronal h-channels are composed of hyperpolarization-activated, cyclic nucleotide-gated (HCN) channel subunits. We have investigated the block of f-channels of rabbit cardiac sino-atrial node cells by ivabradine, a novel heart ...

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