Results 301 to 310 of about 503,305 (349)

Calcium, calcium channels, and calcium channel antagonists

Canadian Journal of Physiology and Pharmacology, 1990
Voltage-dependent Ca2+ channels are an important pathway for Ca2+ influx in excitable cells. They also represent an important site of action for a therapeutic group of agents, the Ca2+ channel antagonists. These drugs enjoy considerable use in the cardiovascular area including angina, some arrhythmias, hypertension, and peripheral vascular disorders ...
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Calcium channels

Current Opinion in Nephrology and Hypertension, 1994
A key step in renal calcium reabsorption is dihydropyridine-sensitive calcium entry across the apical membrane of the distal tubule. Electrophysiologic studies have confirmed the existence of calcium channels that may mediate this pathway. Molecular studies of voltage-dependent calcium channels have revealed a surprising degree of heterogeneity.
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Calcium channels and calcium channel antagonists

Annals of Neurology, 1987
AbstractChanges in free intracellular Ca2+ levels provide signals that allow nerve and muscle cells to respond to a host of external stimuli. A major mechanism for elevating the level of intracellular Ca2+ is the influx of extracellular Ca2+ through voltage‐dependent channels in the cell membrane.
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Calcium channel blockers and calcium channels

2004
In 1883, Ringer showed that to get isolated hearts to contract, it was necessary to have Ca2+ ions in the perfusion medium [421]. This was the first demonstration of the critical role of calcium in cellular activity. Remarkably, a hundred years passed before the importance of calcium was recognized in processes other than muscle contraction, and almost
Eric Ertel, Théophile Godfraind
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Calcium channel activation stabilizes a neuronal calcium channel mRNA

Nature Neuroscience, 1999
We have identified a calcium-dependent pathway in neurons that regulates expression levels of the alpha1B subunit and N channel current. When neurons are depolarized and voltage-gated calcium channels activated, the half-life of cellular N channel alpha1B mRNA is prolonged.
S, Schorge, S, Gupta, Z, Lin, M W, McEnery, D, Lipscombe   +4 more
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Calcium Channel Blockers

AACN Advanced Critical Care, 1992
Calcium channel blockers are widely used in the treatment of ischemic heart disease, hypertension, and supraventricular tachycardia. The prototype agents, verapamil, nifedipine, and diltiazem, represent three classes of calcium channel blockers, each of which has different pharmacologic effects.
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Calcium Channelopathies: Voltage-Gated Calcium Channels

2007
Since the initial identification of native calcium currents, significant progress has been made towards our understanding of the molecular and cellular contributions of voltage-gated calcium channels in multiple physiological processes. Moreover, we are beginning to comprehend their pathophysiological roles through both naturally occurring ...
P J, Adams, T P, Snutch
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Calcium channel modulators and calcium channels.

Biochemical Society symposium, 1986
In recent years calcium has become recognized as an important 'second messenger', in that an increase in free intracellular calcium ion concentration is involved in many aspects of cellular activation. In excitable cells such as smooth muscle or cardiac tissue an influx of extracellular calcium ions through voltage sensitive calcium channels plays a ...
R, Towart, M, Schramm
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Calcium channel diversity: multiple roles of calcium channel subunits

Current Opinion in Neurobiology, 2009
Until recently we held the simple view that voltage-gated calcium channels consisted of an alpha1 subunit, usually associated with auxiliary beta subunits and alpha(2)delta subunits and that skeletal muscle calcium channels were also associated with a gamma subunit.
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Capacitative calcium entry channels

BioEssays, 1999
In the phospholipase C signaling system, Ca(2+) is mobilized from intracellular stores by an action of inositol 1,4,5-trisphosphate. The depletion of intracellular calcium stores activates a calcium entry mechanism at the plasma membrane called capacitative calcium entry.
J W, Putney, R R, McKay
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