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B K Lawton et al.
British journal of anaesthesia, 108(6), 929-935 (2012-04-19)
Propofol acts as an L-type calcium channel (LTCC) antagonist to decrease peripheral resistance and initiate hypotension. This study investigated LTCC sensitivity/expression in hypertension and the role of LTCCs in exaggerated hypotension to propofol in this situation. Age-matched 12- to 15-week-old
J J Enyeart et al.
Molecular endocrinology (Baltimore, Md.), 4(5), 727-735 (1990-05-01)
Dihydropyridine (DHP) Ca2+ channel modulators were used to explore the relationship between voltage-gated Ca2+ channels and PRL secretion, synthesis, and mRNA in PRL-secreting pituitary cells. Optical isomers of the Ca2+ channel agonist Bay K 8644 produced stereospecific and opposing effects
Herbert Marini et al.
Frontiers in endocrinology, 3, 94-94 (2012-10-13)
Genistein aglycone, one of the soy isoflavones, has been reported to be beneficial in the treatment of menopausal vasomotor symptoms, osteoporosis, and cardiovascular diseases, as well as in a variety of cancers. However, issues of potential harm on thyroid function
Florian Jantschak et al.
Naunyn-Schmiedeberg's archives of pharmacology, 385(6), 595-603 (2012-03-01)
Enhanced pulmonary vasoconstriction in response to injuries of the central nervous system and hypoxia result in pulmonary edema due to increased sympathetic activation. This study aimed to characterize α(2)-adrenoceptor (AR)-mediated responses in porcine pulmonary arteries. α(2)-AR-mediated vasoconstriction was studied using
Sylvain Brunet et al.
The Journal of general physiology, 141(1), 85-94 (2012-12-20)
Increases in intracellular Mg(2+) (Mg(2+)(i)), as observed in transient cardiac ischemia, decrease L-type Ca(2+) current of mammalian ventricular myocytes (VMs). However, cardiac ischemia is associated with an increase in sympathetic tone, which could stimulate L-type Ca(2+) current. Therefore, the effect
Vítor S Fernandes et al.
Steroids, 77(5), 394-402 (2012-01-31)
Testosterone replacement therapy improves bladder capacity in urinary tract dysfunction. There is no information, however, about the role of this steroid hormone on the muscle tension of the bladder outflow region. The current study investigated the mechanisms underlying the testosterone-induced
Mercedes Segovia et al.
Cancer cell, 35(5), 767-781 (2019-05-16)
Although immune checkpoint blockers have yielded significant clinical benefits in patients with different malignancies, the efficacy of these therapies is still limited. Here, we show that disruption of transmembrane protein 176B (TMEM176B) contributes to CD8+ T cell-mediated tumor growth inhibition by
Paula Clancy et al.
Journal of atherosclerosis and thrombosis, 23(7), 773-791 (2016-03-08)
Matrix metalloproteinases (MMPs), angiotensin II (AII) and its receptors are implicated in atherosclerotic plaque instability, however the roles of the two receptor subtypes, ATR1 and ATR2, in MMP regulation remain uncertain. In this study, we investigated the effect of ATR1
[JSNP Excellent Presentation Award for AsCNP 2011: role of a novel molecule "shati" in animal model of dystonia].
E Saika et al.
Nihon shinkei seishin yakurigaku zasshi = Japanese journal of psychopharmacology, 32(2), 121-122 (2012-06-20)
J Chevalier et al.
The Journal of physiology, 586(7), 1963-1975 (2008-02-09)
The regulation of neuromediator expression by neuronal activity in the enteric nervous system (ENS) is currently unknown. Using primary cultures of ENS derived from rat embryonic intestine, we have characterized the regulation of tyrosine hydroxylase (TH), a key enzyme involved
Mariko Sekiguchi-Tonosaki et al.
American journal of physiology. Cell physiology, 296(5), C1195-C1206 (2009-02-27)
Retinal pigmented epithelial cells exchange their cellular phenotypes into lens cells and neurons, via depigmented and non-epithelial-shaped dedifferentiated intermediates. Because these dedifferentiated cells can either revert to pigmented epithelial cells or transdifferentiate into lens cells and/or neurons, they are recognized
A Das et al.
Pigment cell & melanoma research, 25(2), 200-212 (2012-01-21)
The expression of voltage-gated calcium channels (VGCCs) has not been reported previously in melanoma cells in spite of increasing evidence of a role of VGCCs in tumorigenesis and tumour progression. To address this issue we have performed an extensive RT-PCR
J Ferrante et al.
Biochemical and biophysical research communications, 158(1), 149-154 (1989-01-16)
The 1,4-dihydropyridine Ca2+ channel activator, (-) [3H]Bay K 8644, binds to cardiac membranes and polarized [5 mM K+] and depolarized [50 mM K+] cardiac cells. Binding to microsomal membranes at 25 degrees C indicates a single set of binding sites
Helena M Viola et al.
American journal of physiology. Heart and circulatory physiology, 304(6), H767-H775 (2013-01-22)
The L-type Ca(2+) channel is the main route for calcium entry into cardiac myocytes, and it is essential for contraction. Alterations in whole cell L-type Ca(2+) channel current and Ca(2+) homeostasis have been implicated in the development of cardiomyopathies. Cytoskeletal
Paula Clancy et al.
Atherosclerosis, 229(2), 331-337 (2013-07-25)
Angiotensin II (AII) receptor 1 (ATR1) and angiotensin converting enzyme 1 (ACE1) blockers have been shown to reduce acute cardiovascular events in patients, improve plaque stability and modify matrix metalloproteinase (MMP) expression. However, the role of the ACE1/AII/ATR1 axis in
Meng Xu et al.
Chinese medical journal, 124(21), 3455-3459 (2012-02-22)
It has been reported that endogenous or exogenous hydrogen sulfide (H(2)S) exerts physiological effects in the vertebrate cardiovascular system. We have also demonstrated that H(2)S acts as an important regulator of electrophysiological properties in guinea pig papillary muscles and on
Beth A McNally et al.
The Journal of physiology, 598(9), 1775-1790 (2019-06-10)
Circadian oscillations in spontaneous action potential firing in the suprachiasmatic nucleus (SCN) translate time-of-day throughout the mammalian brain. The ion channels that regulate the circadian pattern of SCN firing have not been comprehensively identified. Ca2+ channels regulate action potential activity
Toshihide Kashihara et al.
American journal of physiology. Heart and circulatory physiology, 302(8), H1645-H1654 (2012-02-07)
L-type Ca(2+) channels (LTCCs) play an essential role in the excitation-contraction coupling of ventricular myocytes. We previously found that t-tubular (TT) LTCC current density was halved by the activation of protein phosphatase (PP)1 and/or PP2A, whereas surface sarcolemmal (SS) LTCC
I N Iakovenko et al.
Ukrains'kyi biokhimichnyi zhurnal (1999 ), 84(5), 55-61 (2013-01-25)
Involvement of protein kinase CK2 (2.7.11.1) in modulation of live cells trans-plasma membrane electron transport was first discovered. Using human erythrocytes a decrease of plasma membrane redox system (PMRS) activity is shown under the action of specific protein kinase CK2
Milton Junio Cândido Bernardes et al.
Journal of ethnopharmacology, 145(1), 227-232 (2012-11-20)
Aspidosperma subincanum is a medicinal herb that is known to be useful for the treatment of cardiovascular-related illnesses. However, its effects and pharmacological mechanisms of action have not been studied. The aim of the present study was to determine the
Marvin G Chang et al.
Biophysical journal, 102(12), 2706-2714 (2012-06-28)
Early afterdepolarizations (EADs) are voltage oscillations that occur during the repolarizing phase of the cardiac action potential and cause cardiac arrhythmias in a variety of clinical settings. EADs occur in the setting of reduced repolarization reserve and increased inward-over-outward currents
Lei Zhang et al.
The Journal of neuroscience : the official journal of the Society for Neuroscience, 33(11), 5006-5016 (2013-03-15)
In rodents, adrenergic signaling by norepinephrine (NE) in the hippocampus is required for the retrieval of intermediate-term memory. NE promotes retrieval via the stimulation of β1-adrenergic receptors, the production of cAMP, and the activation of both protein kinase A (PKA)
Jeremy Mark Hernandez et al.
European journal of pharmacology, 696(1-3), 161-165 (2012-10-02)
Resistance arteries constrict in response to mechanical stress. This response is myogenic in nature, and reliant on membrane depolarization, activation of L-type Ca(2+) channels, Ca(2+)-induced Ca(2+)-release and large conductance Ca(2+)-dependent K(+) channels (BK(Ca)). Airway smooth muscle is also affected by
Joshua P Whitt et al.
The Journal of general physiology, 150(2), 259-275 (2017-12-15)
Large conductance K+ (BK) channels are expressed widely in neurons, where their activation is regulated by membrane depolarization and intracellular Ca2+ (Ca2+i). To enable this regulation, BK channels functionally couple to both voltage-gated Ca2+ channels (VGCCs) and channels mediating Ca2+
Ning Lü et al.
Journal of neuroscience research, 90(5), 1096-1104 (2012-02-09)
Tetanic stimulation of the sciatic nerve induces long-term potentiation (LTP) of C-fiber-evoked field potentials in the spinal dorsal horn and persistent pain, suggesting that spinal LTP may be a substrate for central sensitization of the pain pathway. However, its cellular
Grzegorz Grześk et al.
Molecular medicine reports, 5(6), 1469-1474 (2012-04-04)
Cyclosporine belongs to the group of the most commonly used immunosuppressants. Hypertension occurs in approximately 30% of patients treated with this drug. However, the pathogenesis of this occurrence has not been explained to date. The purpose of our study was
Hisao Yamamura et al.
The Journal of pharmacology and experimental therapeutics, 342(2), 486-496 (2012-05-17)
The involvement of inositol 1,4,5-trisphosphate (IP(3)) formation in the voltage-dependent regulation of intracellular Ca(2+) concentration ([Ca(2+)](i)) was examined in smooth muscle cells of the porcine coronary artery. Slow ramp depolarization from -90 to 0 mV induced progressive [Ca(2+)](i) increase. The
Amit Singhal et al.
Science translational medicine, 6(263), 263ra159-263ra159 (2014-11-21)
The global burden of tuberculosis (TB) morbidity and mortality remains immense. A potential new approach to TB therapy is to augment protective host immune responses. We report that the antidiabetic drug metformin (MET) reduces the intracellular growth of Mycobacterium tuberculosis
Gildenisson Araújo do Nascimento et al.
Arquivos brasileiros de cardiologia, 113(5), 925-932 (2019-09-05)
D-limonene (DL) is a monoterpene and is the major component in the essential oil of citrus fruit. It presents antihyperglycemic and vasodilatation activities. This study evaluated the cardiovascular effects and potential antiarrhythmic of DL in rats. Hemodynamic and electrocardiographic (ECG)
Young-Hwan Kim et al.
Biochemical and biophysical research communications, 418(1), 167-172 (2012-01-17)
We evaluated the effects of protease-activated receptor (PAR)-2 on spontaneous myometrial contraction (SMC) in isolated term pregnant myometrial strips of rat, and elucidated the cellular mechanisms of this effect using a conventional voltage-clamp method. In isometric tension measurements, trypsin and
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