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Stamatiou R, Paraskeva E, Vasilaki A, Hatziefthimiou A. The muscarinic antagonist gallamine induces proliferation of airway smooth muscle cells regardless of the cell phenotype. Pharmacol Rep 2018; 71:225-232. [PMID: 30785060 DOI: 10.1016/j.pharep.2018.10.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 10/04/2018] [Accepted: 10/19/2018] [Indexed: 01/03/2023]
Abstract
BACKGROUND Muscarinic receptor antagonists are a usual treatment for chronic airway diseases, with increased bronchoconstriction, like asthma and chronic obstructive pulmonary disease. These diseases are usually accompanied by airway remodeling, involving airway smooth muscle cell (ASMC) proliferation. The purpose of this study was to examine the effect of the muscarinic receptor modulator gallamine on rabbit tracheal ASMC proliferation. METHODS ASMCs were incubated with gallamine (1 nM-10 mM), atropine (1 fM-10 mM), and/or acetylcholine (1 nM-1 mM), in the presence or absence of FBS (1% or 10%). Cell proliferation was estimated by incorporation of radioactive thymidine, the Cell Titer AQueous One Solution method and cell number counting after Trypan blue exclusion. The mechanisms mediating cell proliferation were studied using the PI3K and MAPK inhibitors LY294002 (20 μM) and PD98059 (100 μM), respectively. Cell phenotype was studied by indirect immunofluorescence for α-actin, Myosin Heavy Chain and desmin. RESULTS ASMC incubation with the muscarinic receptor allosteric modulator gallamine or the muscarinic receptor antagonist atropine increased methyl-[3H]thymidine incorporation and cell number in a dose-dependent manner. ASMC proliferation was mediated via PI3K and MAPK activation and was transient. Gallamine antagonized the mitogenic effect of 1% FBS. Furthermore, gallamine had a similar effect on contractile ASMCs, without synergizing with or affecting acetylcholine induced proliferation, or altering the percentage of ASMCs expressing contractile phenotype marker proteins. CONCLUSIONS Gallamine, in the absence of any agonist, has a transient mitogenic effect on ASMCs, regardless of the cell phenotype, mediated by the PI3K and the MAPK signaling pathways.
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Affiliation(s)
- Rodopi Stamatiou
- Laboratory of Physiology, Department of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, Larissa, Greece.
| | - Efrosini Paraskeva
- Laboratory of Physiology, Department of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, Larissa, Greece.
| | - Anna Vasilaki
- Laboratory of Pharmacology, Department of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, Larissa, Greece.
| | - Apostolia Hatziefthimiou
- Laboratory of Physiology, Department of Medicine, School of Health Sciences, University of Thessaly, BIOPOLIS, Larissa, Greece.
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Menezes PMN, Brito MC, de Paiva GO, Dos Santos CO, de Oliveira LM, de Araújo Ribeiro LA, de Lima JT, Lucchese AM, Silva FS. Relaxant effect of Lippia origanoides essential oil in guinea-pig trachea smooth muscle involves potassium channels and soluble guanylyl cyclase. JOURNAL OF ETHNOPHARMACOLOGY 2018; 220:16-25. [PMID: 29609011 DOI: 10.1016/j.jep.2018.03.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 03/17/2018] [Accepted: 03/29/2018] [Indexed: 06/08/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Lippia origanoides H.B.K. is an aromatic species used in folk medicine to treat respiratory diseases, including asthma. AIM OF THE STUDY The aim of this work was to evaluate the relaxing potential and mechanism of action of the L. origanoides (LOO) essential oil in isolated guinea-pig trachea. MATERIALS AND METHODS Leaves from L. origanoides were collected at experimental fields under organic cultivation, at the Forest Garden of Universidade Estadual de Feira de Santana. Essential oil was extracted by hydrodistillation, analyzed by GC/FID and GC/MS and the volatile constituents were identified. Spasmolytic activity and relaxant mechanism of LOO were assayed in isolated guinea-pig trachea contracted with histamine, carbachol or hyperpolarizing KCl. RESULTS Chemical analysis revealed the presence of carvacrol (53.89%) as major constituent. LOO relaxed isolated guinea-pig trachea pre-contracted with KCl 60 mM [EC50 = 30.02 μg/mL], histamine 1 µM [EC50 = 9.28 μg/mL] or carbachol 1 µM [EC50 = 51.80 μg/mL]. The pre-incubation of glibenclamide, CsCl, propranolol, indomethacin, hexamethonium, aminophylline or L-NAME in histamine-induced contractions did not alter significantly the relaxant effect of LOO. However, the presence of 4-aminopyridine, tetraethylammonium or methylene blue reduced LOO effect, while the presence of dexamethasone or atropine potentialized the LOO relaxant effect. LOO pre-incubation inhibited carbachol-evoked contractions, with this effect potentialized in the presence of sodium nitroprusside and blocked in the presence of ODQ. CONCLUSIONS The relaxant mechanism of LOO on the tracheal smooth muscle possibly involves stimulating of soluble guanylyl cyclase with consequent activation of the voltage-gated and Ca2+-activated K+ channels.
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Affiliation(s)
| | - Mariana Coelho Brito
- Colegiado de Farmácia, Universidade Federal do Vale do São Francisco (UNIVASF), Brazil.
| | | | | | - Lenaldo Muniz de Oliveira
- Horto Florestal, Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana (UEFS), Brazil.
| | - Luciano Augusto de Araújo Ribeiro
- Pós-graduação em Recursos Naturais do Semiárido, Universidade Federal do Vale do São Francisco (UNIVASF), Brazil; Colegiado de Farmácia, Universidade Federal do Vale do São Francisco (UNIVASF), Brazil.
| | - Julianeli Tolentino de Lima
- Pós-graduação em Recursos Naturais do Semiárido, Universidade Federal do Vale do São Francisco (UNIVASF), Brazil; Colegiado de Farmácia, Universidade Federal do Vale do São Francisco (UNIVASF), Brazil.
| | - Angélica Maria Lucchese
- Laboratório de Química de Produtos Naturais e Bioativos, Departamento de Ciências Exatas, Universidade Estadual de Feira de Santana (UEFS), Brazil.
| | - Fabrício Souza Silva
- Pós-graduação em Recursos Naturais do Semiárido, Universidade Federal do Vale do São Francisco (UNIVASF), Brazil; Colegiado de Farmácia, Universidade Federal do Vale do São Francisco (UNIVASF), Brazil.
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Abraham G. The importance of muscarinic receptors in domestic animal diseases and therapy: Current and future perspectives. Vet J 2016; 208:13-21. [DOI: 10.1016/j.tvjl.2015.10.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 10/06/2015] [Accepted: 10/08/2015] [Indexed: 01/24/2023]
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Mastromatteo-Alberga P, Placeres-Uray F, Alfonzo-González MA, Alfonzo RGD, Becemberg ILD, Alfonzo MJ. A novel PDE1A coupled to M2AChR at plasma membranes from bovine tracheal smooth muscle. J Recept Signal Transduct Res 2015; 36:278-87. [PMID: 26513204 DOI: 10.3109/10799893.2015.1101136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Muscarinic antagonists, via muscarinic receptors increase the cAMP/cGMP levels at bovine tracheal smooth muscle (BTSM) through the inhibition of phosphodiesterases (PDEs), displaying a similar behavior of vinpocetine (a specific-PDE1 inhibitor). The presence of PDE1 hydrolyzing both cyclic nucleotides in BTSM strips was revealed. Moreover, a vinpocetine and muscarinic antagonists inhibited PDE1 located at plasma membranes (PM) fractions from BTSM showing such inhibition, an M(2)AChR pharmacological profile. Therefore, a novel Ca(2+)/CaM dependent and vinpocetine inhibited PDE1 was purified and characterized at PM fractions from BTSM. This PDE1 activity was removed from PM fractions using a hypotonic buffer and purified some 38 fold using two columns (Q-Sepharose and CaM-agarose). This PDE1 was stimulated by CaM and inhibited by vinpocetine showing two bands in PAGE-SDS (56, 58 kDa) being the 58 kDa identified as PDE1A by Western blotts. This PDE1A activity was assayed with [(3)H]cGMP and [(3)H]cAMP exhibiting a higher affinity as Km (μM) for cGMP than cAMP but being close values with V(max) cAMP/cGMP ratio of 1.5. The co-factor Mg(2+) showed similar K(A) (mM) for both cyclic nucleotides. Vinpocetine showed similar inhibition concentration 50% (IC(50) of 4.9 and 4.6 μM) for cAMP and cGMP, respectively. CaM stimulated the cyclic nucleotides hydrolysis by PDE1A exhibiting similar activation constant as K(CaM), in nM range. The original finding was the identification and purification of a vinpocetine and muscarinic antagonist-inhibited and CaM-activated PM-bound PDE1A, linked to M(2)AChR. A model of this novel signal transducing cascade for the regulation of cyclic nucleotides levels at BTSM is proposed.
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Affiliation(s)
- Patrizzia Mastromatteo-Alberga
- a Sección de Biomembranas, Facultad de Medicina, Universidad Central de Venezuela, Instituto de Medicina Experimental , Caracas , Venezuela
| | - Fabiola Placeres-Uray
- a Sección de Biomembranas, Facultad de Medicina, Universidad Central de Venezuela, Instituto de Medicina Experimental , Caracas , Venezuela
| | - Marcelo A Alfonzo-González
- a Sección de Biomembranas, Facultad de Medicina, Universidad Central de Venezuela, Instituto de Medicina Experimental , Caracas , Venezuela
| | - Ramona Gonzalez de Alfonzo
- a Sección de Biomembranas, Facultad de Medicina, Universidad Central de Venezuela, Instituto de Medicina Experimental , Caracas , Venezuela
| | - Itala Lippo de Becemberg
- a Sección de Biomembranas, Facultad de Medicina, Universidad Central de Venezuela, Instituto de Medicina Experimental , Caracas , Venezuela
| | - Marcelo J Alfonzo
- a Sección de Biomembranas, Facultad de Medicina, Universidad Central de Venezuela, Instituto de Medicina Experimental , Caracas , Venezuela
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Torres KJ, Göttle P, Kremer D, Rivera JF, Aguirre-Cruz L, Corona T, Hartung HP, Küry P. Vinpocetine inhibits oligodendroglial precursor cell differentiation. Cell Physiol Biochem 2012; 30:711-22. [PMID: 22854710 DOI: 10.1159/000341451] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/04/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND In multiple sclerosis during periods of remission a limited degree of myelin repair can be observed mediated by oligodendroglial precursor cells. Phosphodiesterase inhibitors act as anti-inflammatory agents and might hold promise for future multiple sclerosis treatment. AIMS To investigate whether phosphodiesterase inhibitors could also influence myelin repair. METHODS We stimulated primary oligodendroglial precursor cells with cilostazol, rolipram and vinpocetine and assessed their effects on repair related cellular processes. RESULTS We found that vinpocetine exerted a strong negative effect on myelin expression while cilostazol and rolipram did not show such effects. In addition, vinpocetine decreased morphological complexities suggesting an overall negative impact on oligodendroglial cell maturation. We provide evidence that this is not mediated via a blockade of phosphodiesterase-1 but rather by inhibition of IĸB kinase. CONCLUSION These findings suggest that vinpocetine via IĸB inhibition exerts a strong negative impact on oligodendroglial cell maturation and may therefore provide the rationale to restrict its application during periods of remission in multiple sclerosis patients. This is of particular interest since vinpocetine is widely used as a health supplement thought to act as a cognitive and memory enhancer for healthy people and patients with neurological or muscle diseases.
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Affiliation(s)
- Klintsy Julieta Torres
- Heinrich-Heine-University, Medical Faculty, Department of Neurology, Düsseldorf, Germany
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Shah AJ, Gilani AH. Bronchodilatory effect of Acorus calamus (Linn.) is mediated through multiple pathways. JOURNAL OF ETHNOPHARMACOLOGY 2010; 131:471-477. [PMID: 20643200 DOI: 10.1016/j.jep.2010.07.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Revised: 07/07/2010] [Accepted: 07/09/2010] [Indexed: 05/29/2023]
Abstract
AIM OF THE STUDY This study was undertaken to provide a pharmacological basis for traditional use of Acorus calamus in airways disorders. MATERIALS AND METHODS Isolated guinea-pig trachea and atria were suspended in organ baths bubbled with carbogen and mechanisms were found using different parameters. RESULTS In isolated guinea-pig tracheal segments, crude extract of Acorus calamus was more effective than carbachol in causing relaxation of high K(+) (80 mM) precontractions, similar to verapamil, suggesting blockade of calcium channels. The n-hexane fraction was equipotent against both precontractions, similar to papaverine, while ethylacetate fraction was more potent against carbachol precontractions but had a negligible dilator effect against K(+), similar to atropine and or rolipram. Pretreatment of tracheal preparations with n-hexane or ethylacetate fractions potentiated isoprenaline-induced inhibitory concentration-response curves, similar to papaverine or rolipram. Pretreatment of tracheal preparations with ethylacetate fraction caused a rightward parallel shift in carbachol response curve at lower concentration (0.003 mg/mL) similar to atropine and a non-parallel shift at higher concentrations (0.01 mg/mL), with reduction of maximum response, similar to rolipram. In isolated guinea-pig atrial preparations, crude extracts, its fractions and papaverine inhibited force and rate of contractions at higher concentrations than the smooth muscle while verapamil was equipotent. CONCLUSION These data indicate the presence of unique combination of airways relaxant constituents in crude extract of Acorus calamus, a papaverine-like dual inhibitor of calcium channels and phosphodiesterase in n-hexane fraction and a novel combination of anticholinergic, rolipram-like phosphodiesterase4 inhibitor in ethylacetate fraction and associated cardiac depressant effect, provide a pharmacological basis for traditional use of Acorus calamus in disorders of airways.
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Affiliation(s)
- Abdul Jabbar Shah
- Department of Biological and Biomedical Sciences, Aga Khan University Medical College, Karachi, Pakistan
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Uray FP, de Alfonzo RG, de Becemberg IL, Alfonzo MJ. Muscarinic agonists acting through M2 acetylcholine receptors stimulate the migration of an NO-sensitive guanylyl cyclase to the plasma membrane of bovine tracheal smooth muscle. J Recept Signal Transduct Res 2010; 30:10-23. [PMID: 19911949 DOI: 10.3109/10799890903325585] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Muscarinic agonists acting on bovine tracheal smooth muscle (BTSM) induce two separate cGMP signals, one at 20 sec associated with NO-sensitive-soluble-guanylyl-cyclase (NO-sGC) and another at 60 sec, linked to natriuretic-peptide-GC. The 20-sec-cGMP novel cascade starts with mAChRs, via unknown components, activates an NO-sGC. To unravel this cascade, in crude membranes isolated from intact BTSM strips exposed to muscarinic agonists, we detected GC activities increments at 20 sec and 60 sec. The 20-sec-GC is a NO-sensitive-GC, identified as alpha(1)beta(1)-heterodimer. In reconstitution experiments with purified plasma membranes and cytosol, muscarinic agonists induced an NO-sGC migration in a dose-dependent manner, being inhibited by muscarinic antagonists displaying an M(2)AChR profile and blocked by PTX, suggesting the involvement of G(o)/G(i) proteins. The NO-sGC related to migration was isolated and identified as an alpha(1)beta(1)-heterodimer. This work shows that muscarinic agonists in BTSM induce a massive and selective alpha(1)beta(1)-NO-sGC migration from cytoplasm to plasma membranes being responsible for the 20-sec-cGMP signal.
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Affiliation(s)
- Fabiola Pláceres Uray
- Sección de Biomembranas, Instituto de Medicina Experimental, Cátedra de Patología General y Fisiopatología, Escuela Luís Razetti, Facultad de Medicina. Universidad Central de Venezuela, Caracas, Venezuela
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