Viola HM, Davies SM, Filipovska A, Hool LC. The L-type Ca channel contributes to alterations in mitochondrial calcium handling in the mdx ventricular myocyte. Am J Physiol Heart Circ Physiol 304: H767–H775, 2013. First published January 18, 2013; doi:10.1152/ajpheart.00700.2012.—The L-type Ca channel is the main route for calcium entry into cardiac myocytes, and it is essential for contraction....

Title: T/L-type calcium channel blocker reduces composite ranking for relative risk according to new KDIGO guidelines in patients with chronic kidney disease

Insulin-like growth factor-1 (IGF-1) promotes the survival of cerebellar granule neurons by enhancing calcium influx through L-type calcium channels, whereas NMDA receptor-mediated calcium influx can lead to excitotoxic death. Here we demonstrate that L and NMDA receptor channel activities differentially regulate the transcription factor C/EBPbeta to control neuronal survival. Specifically, we ...

In human hypertrophic cardiomyopathy and hypertension associated ventricular hypertrophy, chronic use of calcium channel blockers results in a significant regression of hypertrophy. The main objective of this study was to test the hypothesis that modulation of calcium influx through the voltage-sensitive L-type Ca2+ channel directly affects myocardial hypertrophy. Agents that modified calcium i...

We have investigated the effects of etomidate 4.4 mumol litre-1, 1.0 mg litre-1 and 27.4 mumol litre-1, 6.25 mg litre-1 on whole-cell and single L-type calcium channel currents in myocytes from guineapig ventricles. For whole-cell recordings, the cells were voltage-clamped and step depolarizations were applied from holding potential of -40 mV to various potentials to elicit L-type calcium curre...

The dihydropyridine-sensitive calcium channel of the rabbit skeletal muscle is the first voltage-gated calcium channel which has been purified and biochemically characterized. The alpha 1-subunit, a 165 kDa protein, of the purified dihydropyridine receptor contains all regulatory sites of a L-type calcium channel and the calcium conducting unit. The purpose of this review is to summarize and di...

Calcium influx is an absolute requirement for the physiological acrosome reaction in sperm from all sources examined, both invertebrate and mammalian. Pharmacological studies suggest that the major channel in the sperm head plasma membrane responsible for modulating calcium entry and intracellular ionized calcium levels could be either an L-type (a class of high voltage-activated) or a T-type (...

Calcium-induced calcium release (CICR) has been observed in cardiac myocytes as elementary calcium release events (calcium sparks) associated with the opening of L-type Ca 2 1 channels. In heart cells, a tight coupling between the gating of single L-type Ca 2 1 channels and ryanodine receptors (RYRs) underlies calcium release. Here we demonstrate that L-type Ca 2 1 channels activate RYRs to pro...

L-type calcium channels play only a minor role in basal neurotransmitter release in brain neurons but contribute significantly after induction of plasticity. Very little is known about mechanisms that enable L-type calcium channel participation in neurotransmitter release. Here, using mouse primary cortical neurons, we found that inhibition of Erk1/2 (extracellular signal-regulated kinases 1 an...

Neuronal voltage-gated calcium channels provide a pathway for calcium influx that is required for processes ranging from intracellular signaling to alterations in cellular excitability. In hippocampal neurons, we have characterized a subtype of dihydropyridine-sensitive L-type calcium channels (Lp channel) that shows multiple kinds of voltage-dependent potentiation of its activity. One type of ...