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Tang F, Yan HL, Wang LX, Xu JF, Peng C, Ao H, Tan YZ. Review of Natural Resources With Vasodilation: Traditional Medicinal Plants, Natural Products, and Their Mechanism and Clinical Efficacy. Front Pharmacol 2021; 12:627458. [PMID: 33867985 PMCID: PMC8048554 DOI: 10.3389/fphar.2021.627458] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 01/29/2021] [Indexed: 12/11/2022] Open
Abstract
For decades, chronic diseases including cardiovascular and cerebrovascular diseases (CCVDs) have plagued the world. Meanwhile, we have noticed a close association between CCVDs and vascular lesions, such as hypertension. More focus has been placed on TMPs and natural products with vasodilation and hypotension. TMPs with vasodilatory and hypotensive activities are mainly from Compositae, Lamiaceae, and Orchidaceae (such as V. amygdalina Del., T. procuinbens L., M. glomerata Spreng., K. galanga L., etc.) whereas natural products eliciting vasorelaxant potentials were primarily from flavonoids, phenolic acids and alkaloids (such as apigenin, puerarin, curcumin, sinomenine, etc.). Furthermore, the data analysis showed that the vasodilatory function of TMPs was mainly concerned with the activation of eNOS, while the natural products were primarily correlated with the blockage of calcium channel. Thus, TMPs will be used as alternative drugs and nutritional supplements, while natural products will be considered as potential therapies for CCVDs in the future. This study provides comprehensive and valuable references for the prevention and treatment of hypertension and CCVDs and sheds light on the further studies in this regard. However, since most studies are in vitro and preclinical, there is a need for more in-depth researches and clinical trials to understand the potential of these substances.
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Affiliation(s)
- Fei Tang
- State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Hong-Ling Yan
- State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Li-Xia Wang
- State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jin-Feng Xu
- State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Cheng Peng
- State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Hui Ao
- Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yu-Zhu Tan
- State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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Sánchez-Recillas A, Navarrete-Vázquez G, Hidalgo-Figueroa S, Bonilla-Hernández M, Ortiz-Andrade R, Ibarra-Barajas M, Yáñez-Pérez V, Sánchez-Salgado JC. Pharmacological characterization of the cardiovascular effect of Nibethione: ex vivo, in vivo and in silico studies. J Pharm Pharmacol 2020; 72:1186-1198. [PMID: 32500554 DOI: 10.1111/jphp.13295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/16/2020] [Accepted: 04/25/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVE This work describes the vasorelaxant and antihypertensive effects and the mechanism of action on vascular smooth muscle cells of Nibethione, a synthetic thiazolidinedione derivative. Additionally, evidence of its cytotoxicity is assessed. METHODS Nibethione (NB) was synthesized, and its vasorelaxant effect and mechanism of action were assessed through ex vivo experiments. Molecular docking studies were used to predict the mode of interaction with L-type Ca2+ channel, and in vivo antihypertensive activity was assayed on spontaneously hypertensive rats (SHR). The cytotoxicity potential was evaluated in porcine aortic endothelial cells (PAECs) from primary explants. KEY FINDINGS Nibethione vasorelaxant effect was efficient on KCl (80 mm) and NE-contraction. This effect was deleteriously modified in the presence of potassium channel block drugs, while the maximal contraction induced with NE was significantly decreased by NB; the CaCl2 -induced contraction was abolished entirely. In vivo experiments showed that NB decreased diastolic blood pressure in 20.3 % after its administration on SHR. The molecular docking showed that NB blocks L-type Ca2+ channel, and in vitro tests showed that NB did not produce cytotoxic activity on PAECs (IC50 >1000 µm). CONCLUSIONS Nibethione showed in vivo antihypertensive and ex vivo vasorelaxant effects with implication of voltage-dependent L-type Ca2+ channel blocking, and this may contribute to the research of novel antihypertensive drugs.
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Affiliation(s)
- Amanda Sánchez-Recillas
- Laboratorio de Farmacología, Facultad de Química, Universidad Autónoma de Yucatán, Mérida, México
| | - Gabriel Navarrete-Vázquez
- Laboratorio de Química Farmacéutica, Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, México
| | - Sergio Hidalgo-Figueroa
- CONACyT, IPICYT/Consorcio de Investigación, Innovación y Desarrollo para las Zonas Áridas, San Luis Potosí, México
| | | | - Rolffy Ortiz-Andrade
- Laboratorio de Farmacología, Facultad de Química, Universidad Autónoma de Yucatán, Mérida, México
| | - Maximiliano Ibarra-Barajas
- Unidad de Investigación en Biomedicina, Facultad de Estudios Superiores Iztacala, Universidad Autónoma de México, Tlalnepantla de Baz, México
| | - Víctor Yáñez-Pérez
- Laboratorio de Farmacología, Facultad de Química, Universidad Autónoma de Yucatán, Mérida, México
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Alba-Betancourt C, Sánchez-Recillas A, Alonso-Castro AJ, Esquivel-Juárez D, Zapata-Morales JR, Yáñez-Pérez V, Álvarez-Camacho D, Medina-Rivera YE, González-Chávez MM, Gasca-Martínez D, Ortiz-Andrade R. Antidiarrheal, vasorelaxant, and neuropharmacological actions of the diterpene tilifodiolide. Drug Dev Res 2019; 80:981-991. [PMID: 31343767 DOI: 10.1002/ddr.21578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 06/23/2019] [Accepted: 07/13/2019] [Indexed: 11/10/2022]
Abstract
Salvia tiliifolia is used in folk medicine as a relaxant agent and for the treatment of diarrhea and neurodegenerative diseases. Tilifodiolide (TFD) is a diterpene obtained from this plant. The purpose of this work was to evaluate the antidiarrheal, vasorelaxant, and neuropharmacological actions of TFD. These effects were selected based on the folk medicinal use of S. tiliifolia. The antidiarrheal activity of 1-50 mg/kg p.o. TFD was assessed with the castor oil related tests. The vasorelaxant effect of TFD (0.9-298 μM) was performed with smooth muscle tissues from rats, and its mechanism of action was evaluated using different inhibitors. The sedative, anxiolytic, and antidepressant effects of 1-100 mg/kg TFD were assessed. The possible mechanisms of action of the anxiolytic and antidepressant effects of TFD were evaluated using inhibitors. TFD exhibited antidiarrheal (ED50 = 10.62 mg/kg) and vasorelaxant (EC50 = 48 ± 3.51 μM) effects. The coadministration of TFD with N(ω)-nitro-L-arginine methyl ester (L-NAME) or 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one (ODQ), reverted the vasorelaxant action showed by TFD alone. TFD exerted anxiolytic actions (ED50 = 20 mg/kg) in the cylinder exploratory test, whereas TFD (50 mg/kg) showed antidepressant actions in the tail suspension test by 44%. The pretreatment with 2 mg/kg flumazenil partially reverted the anxiolytic actions of TFD, whereas the pretreatment with 1 mg/kg yohimbine abolished the antidepressant effects of TFD. In summary, TFD exerted antidiarrheal activity by decreasing the intestinal fluid accumulation and vasorelaxant effects mediated by nitric oxide and cyclic guanosine monophosphate. TFD showed anxiolytic and antidepressant effects by the partial involvement of gamma-Aminobutyric acid (GABA) receptors and the possible participation of α2-adrenoreceptors, respectively.
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Affiliation(s)
- Clara Alba-Betancourt
- Department of Pharmacy, Division of Natural and Exact Sciences, University of Guanajuato, Guanajuato, Mexico
| | | | - Angel J Alonso-Castro
- Department of Pharmacy, Division of Natural and Exact Sciences, University of Guanajuato, Guanajuato, Mexico
| | - David Esquivel-Juárez
- Department of Pharmacy, Division of Natural and Exact Sciences, University of Guanajuato, Guanajuato, Mexico
| | - Juan R Zapata-Morales
- Department of Pharmacy, Division of Natural and Exact Sciences, University of Guanajuato, Guanajuato, Mexico
| | | | - Daniel Álvarez-Camacho
- Department of Pharmacy, Division of Natural and Exact Sciences, University of Guanajuato, Guanajuato, Mexico
| | - Yessica E Medina-Rivera
- School of Chemical Sciences, Autonomus University of San Luis Potosi, San Luis Potosí, Mexico
| | - Marco M González-Chávez
- School of Chemical Sciences, Autonomus University of San Luis Potosi, San Luis Potosí, Mexico
| | - Deisy Gasca-Martínez
- Institut of Neurobiology, National Autonomous University of Mexico, Querétaro, Mexico
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Garín-Aguilar ME, Benavides-Catalán D, Segura Cobos D, Ramírez Sotelo G, Piña Guzmán AB, Valencia-Del Toro G. Spasmolytic effect of Alternanthera repens on isolated rat ileum. PHARMACEUTICAL BIOLOGY 2013; 52:479-485. [PMID: 24192401 DOI: 10.3109/13880209.2013.844716] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Abstract Context: Alternanthera repens (L.) Kuntze (Amaranthaceae) is widely used in Mexican traditional medicine for the treatment of gastrointestinal disorders that are mainly related to diarrhea. Objective: The aim of the present study was to investigate the spasmolytic effect of hexane (Hx), methanol (Me) and aqueous (Aq) extracts as well as chromatographic Me fractions (F1-F6) of A. repens in rat ileum. Materials and methods: Dried and powdered aerial parts were used to obtain the extracts. The rat ileum preparations were incubated in Tyrode's solution gassed (95% O2-5% CO2) at 37 °C. The effect on the contractile response of isolated ileum was evaluated by obtaining cumulative concentration-response curves to CaCl2, KCl, 5-HT and acetylcholine in the absence and presence of different doses of Aq (0.56-2.09 mg/mL), Me (0.24-0.91 mg/mL) and Hx (0.24-0.91 mg/mL) extracts, as well as six Me fractions of 0.66 mg/mL (F1 to F6). Results: The A. repens Me (0.24 mg/mL) caused an inhibitory response of the Ca2+-induced contractions, with IC50 values of 0.18 ± 0.061 and 0.67 ± 0.061 mM in the presence and absence of the Me, respectively. Me fractions F2 to F4 presented a significant inhibitory effect (F(3,8) = 60.17, p = 0.0001), causing a reduction in the CaCl2-induced contractions and shifting the Ca2+ (0.39 to 1.81 mM) concentration-response curves to the right. With respect to the effect on 5-HT-induced contractions, IC50 values Hx extract (0.24 mg/mL) were 5.44 ± 0.08 × 10-6 M and 3.38 ± 0.07 × 10-6 M in the presence and absence of the Hx, respectively. Discussion and conclusion: The spasmolytic effects induced by Me and Me fractions of A. repens may involve a serotonergic and Ca2+ influx blockade mechanisms, which may justify the use of A. repens extracts as an effective traditional treatment against diarrhea.
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Affiliation(s)
- María E Garín-Aguilar
- Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Los Reyes Iztacala , Tlalnepantla, Estado México , México and
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Rendón-Vallejo P, Hernández-Abreu O, Vergara-Galicia J, Millán-Pacheco C, Mejía A, Ibarra-Barajas M, Estrada-Soto S. Ex vivo study of the vasorelaxant activity induced by phenanthrene derivatives isolated from Maxillaria densa. JOURNAL OF NATURAL PRODUCTS 2012; 75:2241-2245. [PMID: 23234371 DOI: 10.1021/np300508v] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The phenanthrenes gymnopusin (1), fimbriol A (2), and erianthridin (3) from Maxillaria densa were found to induce significant relaxant effects in a concentration-dependent and endothelium-independent manner on aortic rings precontracted with norepinephrine (NE, 0.1 μM) and KCl (80 mM). Compound 1 was the most active and also inhibited the cumulative concentration-response contraction of NE or CaCl(2). Contractions induced by FPL 64176, an agonist of L-type voltage-dependent calcium channels, were blocked by 1. The potassium channel blockers glibenclamide and TEA (tetraethylammonium) reduced the relaxations induced by 1. Nevertheless, the effect of 1 was not modified by 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one, a specific soluble guanylate cyclase inhibitor. The functional results obtained suggest that 1 induces relaxation through an endothelium-independent pathway by the control of cationic channels (calcium channel blockade and potassium channel opening) in the myogenic response of rat aortic rings.
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Affiliation(s)
- Priscila Rendón-Vallejo
- Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Colonia Chamilpa, 62209. Cuernavaca, Morelos, México
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Estrada-Soto S, Sánchez-Recillas A, Navarrete-Vázquez G, Castillo-España P, Villalobos-Molina R, Ibarra-Barajas M. Relaxant effects of Artemisia ludoviciana on isolated rat smooth muscle tissues. JOURNAL OF ETHNOPHARMACOLOGY 2012; 139:513-518. [PMID: 22155473 DOI: 10.1016/j.jep.2011.11.041] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Revised: 11/19/2011] [Accepted: 11/22/2011] [Indexed: 05/29/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Artemisia ludoviciana spp. mexicana (Willd. Ex.) Spring D.D. Keck (Asteraceae), known as "estafiate" is employed for the treatment of diarrhea, dysentery, parasites, abdominal pain, vomiting, stomach ache, and also as antispasmodic agent. The aim of the present study was to evaluate the relaxant effect of hexanic (HEAl), dichloromethanic (DEAl) and methanolic (MEAl) extracts on isolated trachea, ileum and aorta rat rings, and to establish the tracheo-relaxant mode of action of DEAl. MATERIALS AND METHODS All extracts were investigated based on their capacity of to inhibit the rat ileum spontaneous contraction, to relax contraction induced by noradrenaline (0.1 μM) on endothelium-intact and endothelium-denuded thoracic aorta rat rings, and also to inhibit contraction provoked by carbachol (1 μM) on rat trachea. RESULTS Organic extracts had no spasmolytic action on ileum strips compared to positive control (papaverine, p<0.05). On the other hand, all extracts induced a significant concentration- and partial endothelium-dependent vasorelaxant activity. Extracts also showed significant relaxant effect on pre-contracted tracheal tissue in a concentration-dependent manner. In last two experiments, DEAl was the most potent and efficient extract; however, it was less potent than papaverine and theophylline, used as positive controls (p<0.05). In tracheal preparation, DEAl shifted to the right, in a parallel manner, the concentration-response curves induced by carbachol (p<0.05). Also, DEAl induced a significant relaxant effect on the contraction produced by potassium chloride (KCl, 80 mM). Pre-incubation with 1-H-[1,2,4]-oxadiazolo-[4,3a]-quinoxalin-1-one (ODQ, 10 μM), indomethacin (10 μM), N(ω)-nitro-L-arginine methyl ester (L-NAME, 10 μM), glibenclamide (10 μM) and 2-aminopyridine (2-AP, 100 μM) did not modify the DEAl-relaxant curves. CONCLUSIONS Functional experiments suggest that the most active extract, DEAl, induced its relaxant effect by possible muscarinic receptors antagonism and calcium channel blockade in tracheal rings. On the other hand, significant vasorelaxant activity showed by DEAl is partially endothelium-dependent. Finally, spasmolytic activity induced by the extracts in the rat ileum was not significant, which suggests that the antidiarrheic effect of the plant is related to antimicrobial and antiparasitic properties previously described.
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Affiliation(s)
- Samuel Estrada-Soto
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Morelos, Mexico.
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Estrada-Soto S, Rivera-Leyva J, Ramírez-Espinosa JJ, Castillo-España P, Aguirre-Crespo F, Hernández-Abreu O. Vasorelaxant effect of Valeriana edulis ssp. procera (Valerianaceae) and its mode of action as calcium channel blocker. J Pharm Pharmacol 2010; 62:1167-74. [DOI: 10.1111/j.2042-7158.2010.01146.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Abstract
Objectives
The aim was to evaluate the relaxant effect of extracts from Valeriana edulis and determine the possible mechanism of action of the hexanic extract as vasorelaxant agent.
Methods
Extracts from rhizomes obtained by maceration (hexanic (HEVe), dichloromethanic (DEVe), methanolic (MEVe) and hydroalcoholic (HAEVe) (3.03–500 µg/ml)) were evaluated on aortic rat rings with and without endothelium.
Key findings
Extracts induced a significant concentration-dependent and endothelium-independent relaxation on isolated rat aorta pre-contracted with noradrenaline (0.1 µm). HEVe, the most potent extract (0.15–50 µg/ml), induced relaxation in aortic rings pre-contracted with KCl (80 mm), with an IC50 value of 34.61 ± 1.41 µg/ml and Emax value of 85.0 ± 4.38%. Pretreatment with HEVe (30 µg/ml) also inhibited contractile responses to noradrenaline and CaCl2. HEVe (9.98 ± 2.0 µg/ml) reduced noradrenaline-induced transient contraction in Ca2+-free solution, and inhibited contraction induced by KCl (80 mm). In endothelium-denuded rings, the vasorelaxant effect of HEVe was not modified by 1-H-[1,2,4]-oxadiazolo-[4,3a]-quinoxalin-1-one (1 µm), tetraethylammonium (5 mm), glibenclamide (10 µm) or 2-aminopyridine (100 µm).
Conclusions
Our results suggest that HEVe induces relaxation through an endothelium-independent pathway, involving blockade of Ca2+ channels, and this effect could be related to the presence of valepotriates.
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Affiliation(s)
- Samuel Estrada-Soto
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | - Julio Rivera-Leyva
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | | | - Patricia Castillo-España
- Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | | | - Oswaldo Hernández-Abreu
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
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Xu Z, Wang X, Dai Y, Kong L, Wang F, Xu H, Lu D, Song J, Hou Z. (+/-)-Praeruptorin A enantiomers exert distinct relaxant effects on isolated rat aorta rings dependent on endothelium and nitric oxide synthesis. Chem Biol Interact 2010; 186:239-46. [PMID: 20433815 DOI: 10.1016/j.cbi.2010.04.024] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2010] [Revised: 04/16/2010] [Accepted: 04/19/2010] [Indexed: 01/04/2023]
Abstract
Praeruptorin A is a coumarin compound naturally occurring in the roots of Peucedanum praeruptorum Dunn., a commonly used traditional Chinese medicine for the treatment of certain respiratory diseases and hypertension. Although previous studies indicated the relaxant effects of (+/-)-praeruptorin A on tracheal and arterial preparations, little is known about the functional characteristics of the enantiomers. In the present study, the two enantiomers were successfully isolated and identified by using a preparative Daicel Chiralpak AD-H column, and their relaxant effects on aorta rings were observed and compared. (+)-Praeruptorin A showed more potent relaxation than (-)-praeruptorin A against KCl- and phenylephrine-induced contraction of rat isolated aortic rings with intact endothelium. Removal of the endothelium remarkably reduced the relaxant effect of (+)-praeruptorin A but not that of (-)-praeruptorin A. Pretreatment of aortic rings with N(omega)-nitro-L-arginine methyl ester (L-NAME, an inhibitor of nitric oxide synthase) or methylene blue (MB, a soluble guanylyl cyclase inhibitor) resulted in similar changes of the relaxant effects of the two enantiomers to endothelium removal. Molecular docking studies also demonstrated that (+)-praeruptorin A was in more agreement to nitric oxide synthase pharmacophores than (-)-praeruptorin A. On the other hand, the two enantiomers of praeruptorin A could slightly attenuate the contraction of rat aortic rings induced by internal Ca(2+) release from sarcoplasmic reticulum (SR). These findings indicated that (+)-praeruptorin A and (-)-praeruptorin A exerted distinct relaxant effects on isolated rat aorta rings, which might be mainly attributed to nitric oxide synthesis catalyzed by endothelial nitric oxide synthase.
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Affiliation(s)
- Zhao Xu
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, Jiangsu, China
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Vasorelaxant and antihypertensive effects of methanolic extract from roots of Laelia anceps are mediated by calcium-channel antagonism. Fitoterapia 2009; 81:350-7. [PMID: 19879929 DOI: 10.1016/j.fitote.2009.10.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2009] [Revised: 10/12/2009] [Accepted: 10/15/2009] [Indexed: 11/21/2022]
Abstract
RMELanc-induced relaxation in aortic rings precontracted with NE, 5-HT and KCl. It also reduced NE-induced transient contraction in Ca(2+)-free solution and inhibited contraction induced by increasing external calcium. Nevertheless, the vasorelaxant effect of RMELanc was not reduced by ODQ, 1-alprenolol, TEA, glibenclamide, and 2-AP. Oral administration of 100 mg/kg of RMELanc exhibited a significant decrease in systolic and diastolic blood pressures in SHR rats. HPLC analysis allowed us to detect the presence of 2,7-dihydroxy-3,4,9-trimethoxyphenantrene (1), which induced a significant relaxation effect. Therefore, our results suggest that RMELanc induces vasorelaxant and antihypertensive effects by blockade of Ca(2+) channels.
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Hernández-Abreu O, Castillo-España P, León-Rivera I, Ibarra-Barajas M, Villalobos-Molina R, González-Christen J, Vergara-Galicia J, Estrada-Soto S. Antihypertensive and vasorelaxant effects of tilianin isolated from Agastache mexicana are mediated by NO/cGMP pathway and potassium channel opening. Biochem Pharmacol 2009; 78:54-61. [PMID: 19447223 DOI: 10.1016/j.bcp.2009.03.016] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2009] [Revised: 03/11/2009] [Accepted: 03/17/2009] [Indexed: 10/21/2022]
Abstract
Current investigation was undertaken to elucidate the mode of action of tilianin, isolated from Agastache mexicana, as a vasorelaxant agent on in vitro functional rat thoracic aorta test and to investigate the in vivo antihypertensive effect on spontaneously hypertensive rats (SHR). Tilianin (0.002-933 microM) induced significant relaxation in a concentration- and endothelium-dependent and -independent manners in aortic rings pre-contracted with noradrenaline (NA, 0.1 microM), and serotonin (5-HT, 100 microM). Effect was more significant (p < 0.05) in endothelium-intact (+E) aorta rings than when endothelium was removed(E). Pre-treatment with N-nitro-L-arginine methyl ester (L-NAME; 10 microM) or 1-H-[1,2,4]-oxadiazolo-[4,3a]-quinoxalin-1-one (ODQ, 1 microM) produced a significant change of the relaxant response and activity was markedly inhibited, but not by indomethacin (10 microM) or atropine (1 microM). Furthermore, tilianin (130 microM) provoked a significant displacement to the left in the relaxation curve induced by sodium nitroprusside (SNP; 0.32 nM to 0.1 microM). Moreover, tilianin induced significant in vitro NO overproduction (1.49 +/- 0.86 microM of nitrites/g of tissue) in rat aorta compared with vehicle (p < 0.05). In addition, pre-treatment with tetraethylammonium (TEA, 5 mM) and 2-aminopyridine (2-AP, 0.1 microM) shifted to the right the relaxant curve induced by tilianin (p < 0.05). Finally, a single oral administration of tilianin (50 mg/kg) exhibited a significant decrease in systolic and diastolic blood pressures (p < 0.05) in SHR model. Results indicate that tilianin mediates relaxation mainly by an endothelium-dependent manner,probably due to NO release, and also through an endothelium-independent pathway by opening K+ channels, both causing the antihypertensive effect.
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Affiliation(s)
- Oswaldo Hernández-Abreu
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Colonia Chamilpa, 62209 Cuernavaca, Morelos, Mexico
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Vergara-Galicia J, Ortiz-Andrade R, Castillo-España P, Ibarra-Barajas M, Gallardo-Ortiz I, Villalobos-Molina R, Estrada-Soto S. Antihypertensive and vasorelaxant activities of Laelia autumnalis are mainly through calcium channel blockade. Vascul Pharmacol 2008; 49:26-31. [DOI: 10.1016/j.vph.2008.04.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2007] [Revised: 04/09/2008] [Accepted: 04/18/2008] [Indexed: 11/24/2022]
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Estrada-Soto S, Rodríguez-Avilez A, Castañeda-Avila C, Castillo-España P, Navarrete-Vázquez G, Hernández L, Aguirre-Crespo F. Spasmolytic action of Lepechinia caulescens is through calcium channel blockade and NO release. JOURNAL OF ETHNOPHARMACOLOGY 2007; 114:364-70. [PMID: 17913415 DOI: 10.1016/j.jep.2007.08.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2007] [Revised: 08/03/2007] [Accepted: 08/12/2007] [Indexed: 05/17/2023]
Abstract
The present study was undertaken to elucidate the mode of action of methanol extract from aerial parts of L. caulescens (TC-MELc) as spasmolytic agent on in vitro rat ileum test, and investigate the possible antibacterial activity of different extracts from the plant. TC-MELc induced a concentration-dependent (0.001 to 100microg/mL) antispasmodic effect on spontaneous contractions. TC-MELc also (IC50 11.2microg/mL) induced a marked depression on cumulative concentration-response curve for carbachol (Emax=2.3+/-0.3g vs. 0.66+/-0.1g) and serotonin (Emax=1.1+/-0.3g vs. -0.01+/-0.09g). Besides, extract decreased and displaced to the right KCl and CaCl2 concentration-response curves. Moreover, TC-MELc (11.2microg/mL) provoked a total relaxation when ileum strips were contracted with carbachol (1microM) in calcium-free Krebs solution. Pre-treatment with l-NAME (10microM) produced a significant change of the relaxant response and activity was markedly inhibited. Additionally, hexanic (HELc), dichloromethanic (DELc) and methanolic (MELc) extracts from aerial parts were studied to determine their antibacterial activity. DELc showed antibacterial activity on all bacterial strains assayed (<or=100.0microg/mL). Data indicate that L. caulescens contains antibacterial and spasmolytic constituents mediating their effect through blockade of Ca2+ influx and NO release, which may explain its traditional use against diarrhoea.
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Affiliation(s)
- Samuel Estrada-Soto
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Colonia Chamilpa, 62209 Cuernavaca, Morelos, Mexico.
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