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Hauerslev M, Mørk SR, Pryds K, Contractor H, Hansen J, Jespersen NR, Johnsen J, Heusch G, Kleinbongard P, Kharbanda R, Bøtker HE, Schmidt MR. Influence of long-term treatment with glyceryl trinitrate on remote ischemic conditioning. Am J Physiol Heart Circ Physiol 2018; 315:H150-H158. [PMID: 29569958 DOI: 10.1152/ajpheart.00114.2018] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Remote ischemic conditioning (RIC) protects against sustained myocardial ischemia. Because of overlapping mechanisms, this protection may be altered by glyceryl trinitrate (GTN), which is commonly used in the treatment of patients with chronic ischemic heart disease. We investigated whether long-term GTN treatment modifies the protection by RIC in the rat myocardium and human endothelium. We studied infarct size (IS) in rat hearts subjected to global ischemia-reperfusion (I/R) in vitro and endothelial function in healthy volunteers subjected to I/R of the upper arm. In addition to allocated treatment, rats were coadministered with reactive oxygen species (ROS) or nitric oxide (NO) scavengers. Rats and humans were randomized to 1) control, 2) RIC, 3) GTN, and 4) GTN + RIC. In protocols 3 and 4, rats and humans underwent long-term GTN treatment for 7 consecutive days, applied subcutaneously or 2 h daily transdermally. In rats, RIC and long-term GTN treatment reduced mean IS (18 ± 12%, P = 0.007 and 15 ± 5%, P = 0.002) compared with control (35 ± 13%). RIC and long-term GTN treatment in combination did not reduce IS (29 ± 12%, P = 0.55 vs. control). ROS and NO scavengers both attenuated IS reduction by RIC and long-term GTN treatment. In humans, I/R reduced endothelial function ( P = 0.01 vs. baseline). Separately, RIC and long-term GTN prevented the reduction in endothelial function caused by I/R; given in combination, prevention was lost. RIC and long-term GTN treatment both protect against rat myocardial and human endothelial I/R injury through ROS and NO-dependent mechanisms. However, when given in combination, RIC and long-term GTN treatment fail to confer protection. NEW & NOTEWORTHY Remote ischemic conditioning (RIC) and long-term glyceryl trinitrate (GTN) treatment protect against ischemia-reperfusion injury in both human endothelium and rat myocardium. However, combined application of RIC and long-term GTN treatment abolishes the individual protective effects of RIC and GTN treatment on ischemia-reperfusion injury, suggesting an interaction of clinical importance.
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Affiliation(s)
- Marie Hauerslev
- Department of Cardiology, Aarhus University Hospital , Aarhus , Denmark
| | - Sivagowry Rasalingam Mørk
- Department of Cardiology, Aarhus University Hospital , Aarhus , Denmark.,Department of Cardiovascular Medicine, University of Oxford , Oxford , United Kingdom
| | - Kasper Pryds
- Department of Cardiology, Aarhus University Hospital , Aarhus , Denmark.,Department of Cardiovascular Medicine, University of Oxford , Oxford , United Kingdom
| | - Hussain Contractor
- Department of Cardiovascular Medicine, University of Oxford , Oxford , United Kingdom
| | - Jan Hansen
- Department of Cardiology, Aarhus University Hospital , Aarhus , Denmark
| | | | - Jacob Johnsen
- Department of Cardiology, Aarhus University Hospital , Aarhus , Denmark
| | - Gerd Heusch
- Institute for Pathophysiology, West German Heart and Vascular Center, University School of Medicine Essen , Essen , Germany
| | - Petra Kleinbongard
- Institute for Pathophysiology, West German Heart and Vascular Center, University School of Medicine Essen , Essen , Germany
| | - Rajesh Kharbanda
- Department of Cardiovascular Medicine, University of Oxford , Oxford , United Kingdom
| | - Hans Erik Bøtker
- Department of Cardiology, Aarhus University Hospital , Aarhus , Denmark
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Wang Y, Yamamoto S, Miyakawa A, Sakurai T, Ibaraki K, Terakawa S. Intravital Oxygen Radical Imaging in Normal and Ischemic Rat Cortex. Neurosurgery 2010; 67:118-27; discussion 127-8. [DOI: 10.1227/01.neu.0000370055.99998.6b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Yong Wang
- Department of Neurosurgery, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Seiji Yamamoto
- Photon Medical Research Center, Department of Neurosurgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Atsuo Miyakawa
- Photon Medical Research Center, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Takashi Sakurai
- Photon Medical Research Center, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Kyoko Ibaraki
- Photon Medical Research Center, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Susumu Terakawa
- Photon Medical Research Center, Hamamatsu University School of Medicine, Hamamatsu, Japan
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Mechanism of S100b release from rat cortical slices determined under basal and stimulated conditions. Neurochem Res 2009; 35:429-36. [PMID: 19823932 DOI: 10.1007/s11064-009-0075-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/25/2009] [Indexed: 10/20/2022]
Abstract
Incubation of rat cortical slices in a medium that was not containing oxygen and glucose (oxygen-glucose deprivation, OGD) caused a 200% increase in the release of S100B. However, when slices were transferred to a medium containing oxygen and glucose (reoxygenation conditions, or REO), S100B release reached 500% of its control value. Neither inhibition of nitric oxide (NO) synthase by L-NAME nor addition of the NO donors sodium nitroprussid (SNP) or hydroxylamine (HA) to the medium altered basal S100B release. Similarly, the presence of SNP, HA or NO precursor L: -arginine in the medium, or inhibition of NO synthase by L-NAME also failed to alter OGD- and REO-induced S100B outputs. Moreover, individual inhibition of PKC, PLA(2) or PLC all failed to attenuate the S100B release determined under control condition or enhanced by either OGD or REO. Blockade of calcium channels with verapamil, chelating the Ca(+2) ions with BAPTA or blockade of sodium channels with tetrodotoxin (TTX) did not alter OGD- and REO-induced S100B release. In contrast to the pharmacologic manipulations mentioned above, glutamate and alpha-ketoglutarate added at high concentrations to the medium prevented both OGD- and REO-induced S100B outputs. These results indicate that neither NO nor the activation of PKC, PLA(2) or PLC seem to be involved in basal or OGD- and REO-induced S100B outputs. Additionally, calcium and sodium currents that are sensitive to verapamil and TTX, respectively, are unlikely to contribute to the enhanced S100B release observed under these conditions.
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Hasegawa M, Hada J, Abe T, Honda K, Shimizu A, Urade M. Theophylline attenuates hippocampal blood flow responses induced by tooth pulp stimulation in rats. Neurosci Res 2009; 65:156-9. [DOI: 10.1016/j.neures.2009.06.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2009] [Revised: 06/09/2009] [Accepted: 06/15/2009] [Indexed: 10/20/2022]
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Frade J, Barbosa R, Laranjinha J. Stimulation of NMDA and AMPA glutamate receptors elicits distinct concentration dynamics of nitric oxide in rat hippocampal slices. Hippocampus 2009; 19:603-11. [DOI: 10.1002/hipo.20536] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Huang CY, Yang HI, Chen SD, Shaw FZ, Yang DI. Protective effects of lipopolysaccharide preconditioning against nitric oxide neurotoxicity. J Neurosci Res 2008; 86:1277-89. [PMID: 18092358 DOI: 10.1002/jnr.21594] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We have characterized lipopolysaccharide (LPS) preconditioning-induced neuroprotective mechanisms against nitric oxide (NO) toxicity. Pretreatment of rat cortical cultures with LPS attenuated neurotoxicity of NO donors, including sodium nitroprusside (SNP) and diethylamine NONOate (NONOate). A transiently increased expression of endothelial nitric oxide synthase (eNOS) accompanied by an increase in NO production was observed during LPS preconditioning. Application of NOS inhibitors including L-N(5)-(1-iminoethyl)-ornithine (L-NIO) and L-nitroarginine methylester (L-NAME) abolished LPS-dependent protection against SNP toxicity. The LPS effect was also blocked by KT5823, an inhibitor of cGMP-dependent protein kinase (PKG). Consistently, application of 8-bromo-cyclic GMP (8-Br-cGMP), a slowly degradable cGMP analogue capable of PKG activation, was neuroprotective. LPS preconditioning resulted in a heightened neuronal expression of Bcl-2 protein that was abolished by L-NAME and KT5823, the respective inhibitors of NOS and PKG. Together, our results reveal the signaling cascade of "LPS --> eNOS --> NO --> cGMP/PKG --> Bcl-2" that might have contributed to the LPS protective effects in cortical neurons.
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Affiliation(s)
- Chia-Yen Huang
- Institute of Neuroscience, Tzu Chi University, Hualien, Taiwan
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