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Calcium channel blockers (CCB), calcium channel antagonists or calcium antagonists [2] are a group of medications that disrupt the movement of calcium (Ca 2+) through calcium channels. [3] Calcium channel blockers are used as antihypertensive drugs, i.e., as medications to decrease blood pressure in patients with hypertension.
An L-type calcium channel with its subunits labeled along with some drugs known to inhibit the channel. The L-type calcium channel (also known as the dihydropyridine channel, or DHP channel) is part of the high-voltage activated family of voltage-dependent calcium channel. [2] "L" stands for long-lasting referring to the length of activation.
L-type calcium channel blockers selectively inhibit these action potentials in smooth muscle which leads to dilation of blood vessels; this in turn corrects hypertension. [10] T-type calcium channel blockers are used to treat epilepsy. Increased calcium conductance in the neurons leads to increased depolarization and excitability.
Zalicus Presents Data on Novel, Oral, N- and T-Type Calcium Channel Blockers for the Treatment of Pain Preclinical Data on Z160 and Z944 Presented at the American Pain Society 2013 Annual Meeting ...
Venom of the Agelenopsis spider is a specific P-type calcium channel blocker. The two known blockers which are specific to P-type calcium channels are peptides derived from the spider venom of Agelenopsis aperta. The toxins from this venom which show selectivity for P-type channels are ω-agatoxin IVA and ω-agatoxin IVB.
High-voltage-gated calcium channels include the neural N-type channel blocked by ω-conotoxin GVIA, the R-type channel (R stands for Resistant to the other blockers and toxins, except SNX-482) involved in poorly defined processes in the brain, the closely related P/Q-type channel blocked by ω-agatoxins, and the dihydropyridine-sensitive L-type ...
Compared with certain other L-type calcium channel blockers (for example those of the phenylalkylamine class such as verapamil) that have significant action at the heart, the dihydropyridine calcium channel blockers lower blood pressure mainly by relaxing the smooth muscle of the blood vessel walls.
Prenylamine has two primary molecular targets in humans: calmodulin and myosin light-chain kinase 2, found in skeletal and cardiac muscle. [4] Pharmacologically, it decreases sympathetic stimulation on cardiac muscle, predominantly through partial depletion of catecholamines via competitive inhibition of reuptake by storage granules, [clarification needed] leading to further depletion due to ...