The effect of Na + ‐Ca 2+ exchange on the recovery from Ca 2+ dependent inactivation of L‐type Ca 2+ channel in cardiomyocytes in pulmonary vein

نویسندگان
چکیده

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

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Effects of Phospholipase C on the Na + - Ca 2 + Exchange and Ca 2 + Permeability of Cardiac

We have examined the effects of phospholipase C pretreatment on Ca2+ transport in highly purified canine cardiac sarcolemmal vesicles. Na+-Ca2+ exchange, measured as Nai+-dependent Caz+ uptake, is stimulated when 10-70% of the membrane phospholipid has been hydrolyzed. Although the phospholipase C treatment also increases sarcolemmal passive Ca2+ flux, the membrane maintains a sufficient permea...

متن کامل

Na(+)/Ca(2+) exchange facilitates Ca(2+)-dependent activation of endothelial nitric-oxide synthase.

Recent evidence suggests the expression of a Na(+)/Ca(2+) exchanger (NCX) in vascular endothelial cells. To elucidate the functional role of endothelial NCX, we studied Ca(2+) signaling and Ca(2+)-dependent activation of endothelial nitric-oxide synthase (eNOS) at normal, physiological Na(+) gradients and after loading of endothelial cells with Na(+) ions using the ionophore monensin. Monensin-...

متن کامل

Na(+)-Ca(2+) exchange current and submembrane [Ca(2+)] during the cardiac action potential.

Na(+)-Ca(2+) exchange (NCX) is crucial in the regulation of [Ca(2+)](i) and cardiac contractility, but key details of its dynamic function during the heartbeat are not known. In the present study, we assess how NCX current (I(NCX)) varies during a rabbit ventricular action potential (AP). First, we measured the steady-state voltage and [Ca(2+)](i) dependence of I(NCX) under conditions when [Ca(...

متن کامل

Potential ] during the Cardiac Action 2+ Exchange Current and Submembrane [ca 2+ -ca + Na

Na -Ca exchange (NCX) is crucial in the regulation of [Ca ]i and cardiac contractility, but key details of its dynamic function during the heartbeat are not known. In the present study, we assess how NCX current (INCX) varies during a rabbit ventricular action potential (AP). First, we measured the steady-state voltage and [Ca ]i dependence of INCX under conditions when [Ca 2 ]i was heavily buf...

متن کامل

Enhanced Ca(2+)-activated Na(+)-Ca(2+) exchange activity in canine pacing-induced heart failure.

Defective excitation-contraction coupling in heart failure is generally associated with both a reduction in sarcoplasmic reticulum (SR) Ca(2+) uptake and a greater dependence on transsarcolemmal Na(+)-Ca(2+) exchange (NCX) for Ca(2+) removal. Although a relative increase in NCX is expected when SR function is impaired, few and contradictory studies have addressed whether there is an absolute in...

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

ژورنال

عنوان ژورنال: The FASEB Journal

سال: 2010

ISSN: 0892-6638,1530-6860

DOI: 10.1096/fasebj.24.1_supplement.595.1