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Younis W, Schini-Kerth VB, Junior AG, Nocchi SR, Silva DB, Roberts RE. Endothelium-independent vasorelaxant effect of Asphodelus tenuifolius Cav. via inhibition of myosin light chain kinase activity in the porcine coronary artery. J Ethnopharmacol 2021; 269:113693. [PMID: 33326818 DOI: 10.1016/j.jep.2020.113693] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 04/11/2020] [Accepted: 12/09/2020] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Asphodelus tenuifolius Cav. (Asphodelaceae), a wild, terrestrial, annual stemless herb, is widely used in traditional medicine for the treatment of hypertension, diabetes, atherosclerosis and circulatory problems. A previous research study from our laboratory revealed that A. tenuifolius has beneficial effects in reducing blood pressure and improves aortic endothelial dysfunction in chronically glucose fed rats. Despite the fact that A. tenuifolius reduces blood pressure and improves endothelial function in vivo, there are no detailed studies about its possible mechanism of action. AIM OF THE STUDY This study was designed to provide pharmacological basis and mechanism of action for the traditional use of A. tenuifolius in hypertension and circulatory problems. We explored the vasorelaxant effect of A. tenuifolius and its underlying vasorelaxation mechanism in porcine coronary artery rings. MATERIALS AND METHODS Aqueous methanolic crude extract of A. tenuifolius was prepared by maceration process and then activity guided fractionation was carried out by using different polarity based solvents. Phytochemical studies were carried out using LC-DAD-MS. Segments of porcine distal coronary artery were set up in a wire myograph for isometric force measurements. Extract/fractions of A. tenuifolius seeds were tested for vasodilator activity by measurement of changes in tone after pre-contraction with the thromboxane mimetic U46619 in the presence or absence of inhibitors of intracellular signaling cascades. RESULTS Crude extract/fractions of A. tenuifolius produced dose dependent endothelium independent vasorelaxant response in coronary rings, whereas, the butanol fraction of A. tenuifolius (BS-AT) produced the largest relaxation response with 100% relaxation at 1 mg/ml, therefore the mechanism of relaxation of this fraction was determined. The relaxation to BS-AT was unaffected by removal of the endothelium, pre-contraction with KCl, or the presence of the non-selective potassium channel blocker tetraethylammonium, indicating that the relaxation was endothelium-independent, and does not involve activation of potassium channels. BS-AT (1 mg/ml) inhibited the contractile response to calcium,the L-type calcium channel activator BAY K8664,and ionomycin, indicating that it inhibits calcium-induced contractions. The relaxation response to BS-AT was attenuated in the absence of extracellular calcium. However, relaxations to BS-AT were also reduced after deletion of calcium from intracellular stores with cyclopiazonic acid. Incubation with 1 mg/ml BS-AT also inhibited phosphorylation of myosin light chains in homogenates of coronary artery. CONCLUSION The butanol extract of Asphodelus tenuifolius produces a large endothelium-independent relaxation of the porcine coronary artery through inhibition of calcium-induced contractions. The effect appears to be downstream of calcium influx, possibly through inhibition of myosin light chain kinase. This study supports previous studies demonstrating that A. tenuifolius reduces blood pressure. Future studies will aim to determine the active compounds underlying this response.
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Affiliation(s)
- Waqas Younis
- Laboratory of Cardiovascular Research and Integrative Pharmacology, College of Pharmacy, University of Sargodha, Sargodha, 40100, Pakistan; Pharmacology Research Group, School of Life Sciences, University of Nottingham Medical School, Queen's Medical Centre, Nottingham, NG7 2UH, United Kingdom
| | - V B Schini-Kerth
- UMR 1260 INSERM Nanomédecine Régénérative Faculté de Pharmacie, Université de Strasbourg, Illkirch, France
| | - Arquimedes Gasparotto Junior
- Laboratory of Electrophysiology and Cardiovascular Pharmacology, Federal University of Grande Dourados (UFGD), P.O. Box 533, 79.804-970, Dourados, MS, Brazil
| | - Samara Requena Nocchi
- Laboratório de Produtos Naturais e Espectrometria de Massas (LaPNEM), Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição (FACFAN), Universidade Federal do Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - Denise Brentan Silva
- Laboratório de Produtos Naturais e Espectrometria de Massas (LaPNEM), Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição (FACFAN), Universidade Federal do Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - Richard E Roberts
- Pharmacology Research Group, School of Life Sciences, University of Nottingham Medical School, Queen's Medical Centre, Nottingham, NG7 2UH, United Kingdom.
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Matera MG, Calzetta L, Gritti G, Gallo L, Perfetto B, Donnarumma G, Cazzola M, Rogliani P, Donniacuo M, Rinaldi B. Role of statins and mevalonate pathway on impaired HDAC2 activity induced by oxidative stress in human airway epithelial cells. Eur J Pharmacol 2018; 832:114-119. [PMID: 29782855 DOI: 10.1016/j.ejphar.2018.05.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 05/17/2018] [Accepted: 05/17/2018] [Indexed: 01/04/2023]
Abstract
In patients with chronic obstructive pulmonary disease (COPD) the inflammatory response is often steroid-resistant, likely since oxidative stress and cigarette smoking impair histone deacetylase 2 (HDAC2) activity. Since it has been demonstrated that statins may restore the HDAC2 activity in cultured human endothelial cells, the aim of this study was to investigate the effects of statins in reversing the steroid-resistance induced by oxidative stress. We evaluated the effects of simvastatin and dexamethasone on HDAC2 expression and activity, and the role of mevalonate and Rho/ROCK pathways in A549 cells, a human lung type II epithelial cell line stressed with H2O2. Our results documented that H2O2 significantly reduced the HDAC2 expression and activity. In H2O2 treated cells dexamethasone was unable to restore the activity of HDAC2, whereas simvastatin restored both the expression and the activity of this enzyme. Our data also showed that mevalonate reduced the activity of HDAC2 whereas Y27632, a Rho/ROCK inhibitor, had no effect on HDAC2 activity when co-administered with simvastatin. Our data suggest that statins could have the potential to restore corticosteroid sensitivity in A549 cells. The evidences of this study suggest that, although both mevalonate and Rho/ROCK pathways are involved in the detrimental effect elicited by oxidative stress, statins may restore the function and expression of depleted HDAC2 via modulating the mevalonate cascade, at least in A549 cells. In conclusion, the modulation of histone acetyltransferase/deacetylase activity may lead to the development of novel anti-inflammatory approaches to inflammatory lung diseases that are currently difficult to treat.
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Affiliation(s)
- Maria Gabriella Matera
- Department of Experimental Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Luigino Calzetta
- Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, Rome, Italy.
| | - Giulia Gritti
- Department of Experimental Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Laura Gallo
- Department of Experimental Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Brunella Perfetto
- Department of Experimental Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Giovanna Donnarumma
- Department of Experimental Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Mario Cazzola
- Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, Rome, Italy
| | - Paola Rogliani
- Department of Experimental Medicine and Surgery, University of Rome Tor Vergata, Rome, Italy
| | - Maria Donniacuo
- Department of Experimental Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Barbara Rinaldi
- Department of Experimental Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
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Sari-Hassoun M, Clement MJ, Hamdi I, Bollot G, Bauvais C, Joshi V, Toma F, Burgo A, Cailleret M, Rosales-Hernández MC, Macias Pérez ME, Chabane-Sari D, Curmi PA. Cucurbitacin I elicits the formation of actin/phospho-myosin II co-aggregates by stimulation of the RhoA/ROCK pathway and inhibition of LIM-kinase. Biochem Pharmacol 2015; 102:45-63. [PMID: 26707799 DOI: 10.1016/j.bcp.2015.12.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 12/15/2015] [Indexed: 12/11/2022]
Abstract
Cucurbitacins are cytotoxic triterpenoid sterols isolated from plants. One of their earliest cellular effect is the aggregation of actin associated with blockage of cell migration and division that eventually lead to apoptosis. We unravel here that cucurbitacin I actually induces the co-aggregation of actin with phospho-myosin II. This co-aggregation most probably results from the stimulation of the Rho/ROCK pathway and the direct inhibition of the LIMKinase. We further provide data that suggest that the formation of these co-aggregates is independent of a putative pro-oxidant status of cucurbitacin I. The results help to understand the impact of cucurbitacins on signal transduction and actin dynamics and open novel perspectives to use it as drug candidates for cancer research.
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Affiliation(s)
- Meryem Sari-Hassoun
- Institut National de la Santé et de la Recherche Médicale, UMR1204, Laboratoire Structure-Activité des Biomolécules Normales et Pathologiques, Université d'Evry-Val d'Essonne, Evry 91025, France; Laboratoire des Produits Naturels, LAPRONA, Université Abou Bekr Belkaid, Tlemcen 13000, Algeria
| | - Marie-Jeanne Clement
- Institut National de la Santé et de la Recherche Médicale, UMR1204, Laboratoire Structure-Activité des Biomolécules Normales et Pathologiques, Université d'Evry-Val d'Essonne, Evry 91025, France
| | - Imane Hamdi
- Institut National de la Santé et de la Recherche Médicale, UMR1204, Laboratoire Structure-Activité des Biomolécules Normales et Pathologiques, Université d'Evry-Val d'Essonne, Evry 91025, France
| | | | | | - Vandana Joshi
- Institut National de la Santé et de la Recherche Médicale, UMR1204, Laboratoire Structure-Activité des Biomolécules Normales et Pathologiques, Université d'Evry-Val d'Essonne, Evry 91025, France
| | - Flavio Toma
- Institut National de la Santé et de la Recherche Médicale, UMR1204, Laboratoire Structure-Activité des Biomolécules Normales et Pathologiques, Université d'Evry-Val d'Essonne, Evry 91025, France
| | - Andrea Burgo
- Institut National de la Santé et de la Recherche Médicale, UMR1204, Laboratoire Structure-Activité des Biomolécules Normales et Pathologiques, Université d'Evry-Val d'Essonne, Evry 91025, France
| | - Michel Cailleret
- Institut National de la Santé et de la Recherche Médicale, UMR1204, Laboratoire Structure-Activité des Biomolécules Normales et Pathologiques, Université d'Evry-Val d'Essonne, Evry 91025, France
| | - Martha Cecilia Rosales-Hernández
- Laboratorio de Biofísica y Biocatalisis, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, Casco de Santo Tomás, México D.F. 11340, México
| | - Martha Edith Macias Pérez
- Laboratorio de Biofísica y Biocatalisis, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, Casco de Santo Tomás, México D.F. 11340, México
| | - Daoudi Chabane-Sari
- Laboratoire des Produits Naturels, LAPRONA, Université Abou Bekr Belkaid, Tlemcen 13000, Algeria
| | - Patrick A Curmi
- Institut National de la Santé et de la Recherche Médicale, UMR1204, Laboratoire Structure-Activité des Biomolécules Normales et Pathologiques, Université d'Evry-Val d'Essonne, Evry 91025, France.
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Rousset M, Cens T, Menard C, Bowerman M, Bellis M, Brusés J, Raoul C, Scamps F, Charnet P. Regulation of neuronal high-voltage activated Ca(V)2 Ca(2+) channels by the small GTPase RhoA. Neuropharmacology 2015; 97:201-9. [PMID: 26044639 DOI: 10.1016/j.neuropharm.2015.05.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 05/12/2015] [Accepted: 05/16/2015] [Indexed: 11/29/2022]
Abstract
High-Voltage-Activated (HVA) Ca(2+) channels are known regulators of synapse formation and transmission and play fundamental roles in neuronal pathophysiology. Small GTPases of Rho and RGK families, via their action on both cytoskeleton and Ca(2+) channels are key molecules for these processes. While the effects of RGK GTPases on neuronal HVA Ca(2+) channels have been widely studied, the effects of RhoA on the HVA channels remains however elusive. Using heterologous expression in Xenopus laevis oocytes, we show that RhoA activity reduces Ba(2+) currents through CaV2.1, CaV2.2 and CaV2.3 Ca(2+) channels independently of CaVβ subunit. This inhibition occurs independently of RGKs activity and without modification of biophysical properties and global level of expression of the channel subunit. Instead, we observed a marked decrease in the number of active channels at the plasma membrane. Pharmacological and expression studies suggest that channel expression at the plasma membrane is impaired via a ROCK-sensitive pathway. Expression of constitutively active RhoA in primary culture of spinal motoneurons also drastically reduced HVA Ca(2+) current amplitude. Altogether our data revealed that HVA Ca(2+) channels regulation by RhoA might govern synaptic transmission during development and potentially contribute to pathophysiological processes when axon regeneration and growth cone kinetics are impaired.
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Affiliation(s)
- Matthieu Rousset
- IBMM, CNRS UMR 5247, Université de Montpellier, 1919 route de Mende, 34293 Montpellier, France
| | - Thierry Cens
- IBMM, CNRS UMR 5247, Université de Montpellier, 1919 route de Mende, 34293 Montpellier, France
| | - Claudine Menard
- IBMM, CNRS UMR 5247, Université de Montpellier, 1919 route de Mende, 34293 Montpellier, France
| | - Melissa Bowerman
- Institut des Neurosciences, INSERM U1051, 80 rue Augustin Fliche, 34091 Montpellier, France
| | - Michel Bellis
- IBMM, CNRS UMR 5247, Université de Montpellier, 1919 route de Mende, 34293 Montpellier, France
| | - Juan Brusés
- Department of Natural Sciences, Mercy College, Dobbs Ferry, NY 10522, USA; Institute for Cell Biology and Neuroscience (CONICET-UBA), Buenos Aires, Argentina
| | - Cedric Raoul
- Institut des Neurosciences, INSERM U1051, 80 rue Augustin Fliche, 34091 Montpellier, France
| | - Frédérique Scamps
- Institut des Neurosciences, INSERM U1051, 80 rue Augustin Fliche, 34091 Montpellier, France
| | - Pierre Charnet
- IBMM, CNRS UMR 5247, Université de Montpellier, 1919 route de Mende, 34293 Montpellier, France.
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Verstrepen L, Beyaert R. Receptor proximal kinases in NF-κB signaling as potential therapeutic targets in cancer and inflammation. Biochem Pharmacol 2014; 92:519-29. [PMID: 25449604 DOI: 10.1016/j.bcp.2014.10.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2014] [Revised: 10/30/2014] [Accepted: 10/30/2014] [Indexed: 01/12/2023]
Abstract
Many signaling pathways leading to activation of transcription factors and gene expression are characterized by phosphorylation events mediated by specific kinases. The transcription factor NF-κB plays a key role in multiple cellular processes, including immune signaling, inflammation, development, proliferation and survival. Dysregulated NF-κB activation is associated with autoimmunity, chronic inflammation and cancer. Activation of NF-κB requires IκB kinase (IKK)α or β, the activity of which is regulated via phosphorylation by specific IKK kinases and by autophosphorylation. Receptor specificity is further obtained by the use of multiple upstream receptor proximal kinases. We review the identities of several IKK regulatory kinases as well as the proposed molecular mechanisms. In addition, we discuss the potential for therapeutic targeting of some of these kinases in the context of inflammatory diseases and cancer.
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Affiliation(s)
- Lynn Verstrepen
- Inflammation Research Center, Unit of Molecular Signal Transduction in Inflammation, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Rudi Beyaert
- Inflammation Research Center, Unit of Molecular Signal Transduction in Inflammation, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
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