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Hydrogen sulphide and vascular smooth muscle

M Cebová, M Košútová, O Pecháňová
Gasotransmitters represent a subfamily of the endogenous gaseous signaling molecules that include nitric oxide (NO), carbon monoxide (CO), and hydrogen sulphide (H(2)S). These particular gases share many common features in their production and function, but they fulfill their physiological tasks in unique ways that differ from those of classical signaling molecules found in tissues and organs. These gasotransmitters may antagonize or potentiate each other's cellular effects at the level of their production, their downstream molecular targets and their direct interactions...
October 24, 2016: Physiological Research
N-N Ping, S Li, Y-N Mi, L Cao, Y-X Cao
AIM: Hydrogen sulphide (H2S) exhibits a dual modulation of isolated artery tension. This study investigated the vasoconstrictive effect of sulphur sodium hydride (NaHS), a donor of gaseous H2S, on rat coronary artery. METHODS: The contractile response of isolated arteries was recorded using a wire myograph. Fluo-3/AM was used to load vascular smooth muscle, and intracellular calcium was determined using confocal laser microscopy. The protein expression of Rho kinase was examined using Western blot...
May 2015: Acta Physiologica
Jesus Prieto-Lloret, Yasin Shaifta, Jeremy P T Ward, Philip I Aaronson
An increase in the H2 S (hydrogen sulphide, hereafter sulphide) concentration in pulmonary artery smooth muscle cells (PASMCs) has been proposed to mediate hypoxic pulmonary vasoconstriction (HPV). We evaluated this hypothesis in isolated rat intrapulmonary arteries (IPAs) by examining the effects of the sulphide precursor cysteine and sulphide-synthesis blockers on HPV and also on normoxic pulmonary vasoconstriction (NPV) stimulated by prostaglandin F2α (PGF2α ) and by the drug LY83583, which causes contraction in IPAs by increasing cellular reactive oxygen species levels...
January 15, 2015: Journal of Physiology
Ioanna Andreadou, Efstathios K Iliodromitis, Tienush Rassaf, Rainer Schulz, Andreas Papapetropoulos, Péter Ferdinandy
Ischaemic heart disease is one of the leading causes of morbidity and mortality worldwide. The development of cardioprotective therapeutic agents remains a partly unmet need and a challenge for both medicine and industry, with significant financial and social implications. Protection of the myocardium can be achieved by mechanical vascular occlusions such as preconditioning (PC), when brief episodes of ischaemia/reperfusion (I/R) are experienced prior to ischaemia; postconditioning (PostC), when the brief episodes are experienced at the immediate onset of reperfusion; and remote conditioning (RC), when the brief episodes are experienced in another vascular territory...
March 2015: British Journal of Pharmacology
Isabel Castro-Piedras, Jose F Perez-Zoghbi
Hydrogen sulphide (H2S) is a signalling molecule that appears to regulate diverse cell physiological process in several organs and systems including vascular and airway smooth muscle cell (SMC) contraction. Decreases in endogenous H2S synthesis have been associated with the development of cardiovascular diseases and asthma. Here we investigated the mechanism of airway SMC relaxation induced by H2S in small intrapulmonary airways using mouse lung slices and confocal and phase-contrast video microscopy. Exogenous H2S donor Na2S (100 μm) reversibly inhibited Ca(2+) release and airway contraction evoked by inositol-1,4,5-trisphosphate (InsP3) uncaging in airway SMCs...
December 1, 2013: Journal of Physiology
Jun Han, Zhi-Wu Chen, Guo-Wei He
We investigated the effects of endothelium-derived hyperpolarizing factor (EDHF) and the role of hydrogen sulphide (H2S) in the cerebral vasorelaxation induced by acetylcholine (ACh) in global cerebral ischemia-reperfusion (CIR) rats. CIR was induced by occlusion of bilateral carotid and vertebral arteries. Isolated arterial segments from the cerebral basilar (CBA) and middle artery (MCA) of CIR rats were studied in a pressurized chamber. Transmembrane potential was recorded using glass microelectrodes to evaluate hyperpolarization...
2013: Journal of Pharmacological Sciences
A Martelli, L Testai, M C Breschi, K Lawson, N G McKay, F Miceli, M Taglialatela, V Calderone
Hydrogen sulphide (H2S) has been recently hypothesized to be an endogenous adipocyte-derived relaxing factor, evoking vasorelaxation of conductance and resistance vessels. Although the activation of ATP-sensitive potassium channels is known to play a central role in H2S-induced vasorelaxation, activation of vascular Kv7 voltage-gated potassium channels has also been suggested. To investigate this possibility, the ability of selective activators and blockers of distinct classes of potassium channels to affect vasodilation induced by the H2S-donor NaHS, as well as NaHS-induced Rb(+) efflux in endothelium-denuded rat aortic rings, was investigated...
April 2013: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
S Rashid, J K Heer, M J Garle, S P H Alexander, R E Roberts
BACKGROUND AND PURPOSE: Hydrogen sulphide (H2S) is an endogenous gasotransmitter. Although it has been shown to elicit responses in vascular and other smooth muscle preparations, a role for endogenously produced H2S in mediating airway tone has yet to be demonstrated. Therefore, the aim of this study was to determine whether H2S is produced within the airways and to determine the functional effect on airway tone. EXPERIMENTAL APPROACH: Small peripheral airways (<5 mm in diameter) from porcine lungs were set up in isolated tissue baths, pre-contracted with the muscarinic agonist carbachol, and then exposed to either the H2S donor sodium hydrosulphide (NaHS), or the precursor L-cysteine...
April 2013: British Journal of Pharmacology
Benjamin J O White, Paul A Smith, William R Dunn
BACKGROUND AND PURPOSE: Hydrogen sulphide (H(2)S) is a gas that has recently been shown to have biological activity. In the majority of blood vessels studied so far, H(2)S has been shown to cause vasorelaxation, although contractile responses have been reported. In the present study, we have made a pharmacological assessment of the effects of H(2)S in mesenteric small arteries isolated from rats. EXPERIMENTAL APPROACH: Rat mesenteric small arteries were studied using pressure myography...
February 2013: British Journal of Pharmacology
Nini Skovgaard, Anja Gouliaev, Mathilde Aalling, Ulf Simonsen
Recent research has shown that the endogenous gas hydrogen sulphide (H2S) is a signalling molecule of considerable biological potential and has been suggested to be involved in a vast number of physiological processes. In the vascular system, H2S is synthesized from cysteine by cystathionine-γ-lyase (CSE) in smooth muscle cells (SMC) and 3- mercaptopyruvate sulfuresterase (3MST) and CSE in the endothelial cells. In pulmonary and systemic arteries, H2S induces relaxation and/or contraction dependent on the concentration of H2S, type of vessel and species...
September 2011: Current Pharmaceutical Biotechnology
Sean Bryan, Guangdong Yang, Rui Wang, Neelam Khaper
BACKGROUND: Hydrogen sulphide (H(2)S) has recently emerged as a novel and important gasotransmitter in the cardiovascular system, where it is generated mainly by cystathionine gamma-lyase (CSE). Abnormal metabolism and functions of the CSE/H(2)S pathway have been linked to various cardiovascular diseases including atherosclerosis and hypertension. An important role for H(2)S in regulating the balance between cellular growth and death has been demonstrated whereby inhibition of the endogenous CSE/H(2)S pathway results in greater apoptosis of vascular smooth muscle cells (SMCs)...
2011: Experimental and Clinical Cardiology
Merve Denizalti, N Tugba Durlu-Kandilci, T Emrah Bozkurt, Inci Sahin-Erdemli
Hydrogen sulphide (H(2)S) is an endogenous mediator producing a potent relaxation response in vascular and non-vascular smooth muscles. While ATP-sensitive potassium channels are mainly involved in this relaxant effect in vascular smooth muscle, the mechanism in other smooth muscles has not been revealed yet. In the present study, we investigated how H(2)S relaxes non-vascular smooth muscle by using intact and β-escin permeabilized guinea-pig taenia caecum. In intact tissues, concentration-dependent relaxation response to H(2)S donor NaHS in carbachol-precontracted preparations did not change in the presence of a K(ATP) channel blocker glibenclamide, adenylate cyclase inhibitor SQ-22536, guanylate cyclase inhibitor ODQ, protein kinase A inhibitor KT-5720, protein kinase C inhibitor H-7, tetrodotoxin, apamin/charybdotoxin, NOS inhibitor L-NAME and cyclooxygenase inhibitor indomethacin...
May 11, 2011: European Journal of Pharmacology
Y K Gupta, A K Dahiya, K H Reeta
Research in the last two decades has transformed the way hydrogen sulphide (H2S) is perceived from a noxious gas to a gaso-transmitter with a vast potential in pharmacotherapy. H2S is synthesized in various body-systems using the enzymes cystathionine beta-synthase and cystathionine gamma-lyase; either of these being the predominat enzyme in a particular system. H2S may be one of the physiological modulators of blood pressure in humans. The gas relaxes the vascular smooth muscle cells by opening up K(ATP) channels...
November 2010: Indian Journal of Experimental Biology
Wai San Cheang, Wing Tak Wong, Bing Shen, Chi Wai Lau, Xiao Yu Tian, Suk Ying Tsang, Xiaoqiang Yao, Zhen Yu Chen, Yu Huang
The present study aimed at examining the role of potassium channels and endothelium in relaxations induced by sodium hydrogen sulphide (NaHS), which is the donor of gaseous hydrogen sulphide (H(2)S) and the effect of NaHS on endothelium-dependent relaxations in rat coronary arteries. Rat coronary arteries were suspended in a myograph for force measurement and changes of the membrane potential in arteries were determined by membrane potential-sensitive fluorescence dye. NaHS relaxed coronary arteries pre-contracted by U46619 and the relaxation was significantly less in high KCl-contracted rings...
September 2010: Vascular Pharmacology
Shiau Wei Lee, Yvonne Cheng, Philip K Moore, Jin-Song Bian
We investigated the role of hydrogen sulphide (H(2)S) in intracellular pH (pH(i)) regulation in vascular smooth muscle cells and its contribution on vasodilation. NaHS, a H(2)S donor, decreased pH(i) in a concentration-dependent manner ranging from 10 microM to 1mM. Neither inhibition of the Na(+)/H(+) exchanger with 5-(N-ethyl-N-isopropyl) amiloride, (EIPA, 10 microM), nor plasmalemmal Ca(2+)-ATPase with CdCl(2) (20nM) alters the effect of NaHS on pH(i). Blockade of the Cl(-)/HCO3- exchanger with 4,4'-diisothiocyanatostilbene-2,2'-disulfonic acid (DIDS) significantly attenuated the pH(i) lowering effect of NaHS...
July 13, 2007: Biochemical and Biophysical Research Communications
Ling Li, Madhav Bhatia, Philip K Moore
Hydrogen sulphide (H2S) is a naturally occurring gas synthesized from cysteine. It exhibits vasodilator activity (most probably by opening vascular smooth muscle K(ATP) channels), influences leucocyte chemotaxis and promotes vascular smooth muscle cell apoptosis. Increased biosynthesis of H2S has been demonstrated in animal models of septic/endotoxic and haemorrhagic shock, pancreatitis and carrageenan-evoked hindpaw oedema in the rat. In each case, pharmacological inhibition of H2S biosynthesis is anti-inflammatory...
April 2006: Current Opinion in Pharmacology
Madhav Bhatia
Gases such as nitric oxide (NO) and carbon monoxide (CO) play important roles both in normal physiology and in disease. The toxic effects of hydrogen sulphide (H2S) on living organisms have been recognized for nearly 300 years. In recent years, however, interest has been directed towards H2S as the third gaseous mediator, which has been shown to exhibit potent vasodilator activity both in vitro and in vivo most probably by opening vascular smooth muscle K(ATP) channels. Of the two enzymes, cystathionine-gamma-lyase (CSE) and cystathionine-beta-synthetase (CBS), which utilize L-cysteine as substrate to form H2S, CSE is believed to be the key enzyme which forms H2S in the cardiovascular system...
September 2005: IUBMB Life
M R Ebrahimkhani, A R Mani, K Moore
Cirrhosis is associated with the development of a hyperdynamic circulation, which is secondary to the presence of systemic vasodilatation. Several mechanisms have been postulated to be involved in the development of systemic vasodilatation, including increased synthesis of nitric oxide, hyperglucagonaemia, increased carbon monoxide synthesis, and activation of K(ATP) channels in vascular smooth muscle cells in the systemic and splanchnic arterial circulation. Hydrogen sulphide (H2S) has recently been identified as a novel gaseous transmitter that induces vasodilatation through activation of K(ATP) channels in vascular smooth muscle cells...
December 2005: Gut
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