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Pakoussi T, Mouzou AP, Metowogo K, Aklikokou KA, Gbeassor M. How do Spondias mombin L ( Anacardiaceae) leaves extract increase uterine smooth muscle contractions to facilitate child birth in parturient women? Afr Health Sci 2018; 18:235-243. [PMID: 30602948 PMCID: PMC6306990 DOI: 10.4314/ahs.v18i2.6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Background Spondias mombin L. (Anacardiaceae) leaves were used in Togolese folk to treat dystocia, expel placenta and manage post-partum hemorrhage during child birth. Objectives This study aimed to establish how the extract of S. mombin leaves increase uterine smooth muscle contractions relevant to its traditional use to facilitate child birth. Methods Tests were performed on uterus muscle strips from Sprague-Dawley rats. Central portion of uterine horns were dissected, cleaned of surrounding fat and loose connective tissue, and cut longitudinally into strips which were placed in the organ bath for isometric tension record in presence of different substances. Results S. mombin leaves extract increased uterine spontaneous contractions. This effect was reduced by indomethacin (2 × 10-6 M), yohimbine (2 × 10-6 M) and 2-aminoethoxydiphenyl borate (2-APB) (5 × 10-5 M), but not by atropine (3.45 × 10-8 M) and cholesterol (2.5 mg/ml). Conclusion The pharmacological justification for the traditional use of S. mombin leaves to treat dystocia and expel placenta was that its hydro-ethanolic extract induced prostaglandins release, α2-adrenoceptors stimulation, calcium release from internal stores and lifted inhibitory effect of cholesterol on uterine contractions in order to increase uterine smooth muscle contractions.
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Affiliation(s)
- Tcha Pakoussi
- Laboratory of Physiology/Pharmacology, Faculty of Sciences, University of Lomé-Togo
| | - Aklesso P Mouzou
- Laboratory of Physiology/Pharmacology, Faculty of Sciences, University of Lomé-Togo
| | - Kossi Metowogo
- Laboratory of Physiology/Pharmacology, Faculty of Sciences, University of Lomé-Togo
| | - Kodjo A Aklikokou
- Laboratory of Physiology/Pharmacology, Faculty of Sciences, University of Lomé-Togo
- Research and Formation Center on Medicinal Plants (CERFOPLAM), University of Lomé-Togo
| | - Messanvi Gbeassor
- Laboratory of Physiology/Pharmacology, Faculty of Sciences, University of Lomé-Togo
- Research and Formation Center on Medicinal Plants (CERFOPLAM), University of Lomé-Togo
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D'Ocón P, Blázquez MA, Bermejo A, Anselmi E. Tetrandrine and Isotetrandrine, Two Bisbenzyltetrahydroisoquinoline Alkaloids from Menispermaceae, with Rat Uterine Smooth Muscle Relaxant Activity. J Pharm Pharmacol 2011; 44:579-82. [PMID: 1357138 DOI: 10.1111/j.2042-7158.1992.tb05468.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Abstract
The effects of two bisbenzyltetrahydroisoquinoline alkaloids, 1S, 1′S tetrandrine and its isomer 1R, 1′S isotetrandrine, were investigated in rat isolated uterus in order to identify the mechanism of relaxant action and to study the influence of the absolute configuration on the activity of these alkaloids. Both inhibited the uterine contraction induced by high K+, acetylcholine and oxytocin. In Ca2+-free medium, isotetrandrine relaxed the sustained contraction induced by oxytocin but tetrandrine did not. The relaxant effects of the alkaloids may be due to blockade of calcium influx through specific channels. Tetrandrine and isotetrandrine modify the calcium channel in a nonreversible manner whilst only isotetrandrine acts intracellularly. Tetrandrine shows a more specific relaxant activity as a calcium entry blocker.
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Affiliation(s)
- P D'Ocón
- Departamento de Farmacología, Facultad de Farmacia, Universidad de Valencia, Spain
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Anselmi E, Fayos G, Blasco R, Candenas L, Cortes D, D'Ocon P. Selective Inhibition of Calcium Entry Induced by Benzylisoquinolines in Rat Smooth Muscle. J Pharm Pharmacol 2011; 44:337-43. [PMID: 1355547 DOI: 10.1111/j.2042-7158.1992.tb03617.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Abstract
The mechanism of relaxant activity of six benzylisoquinolines was examined in order to determine the minimal structural requirements that enable these compounds to have either a non-specific action like papaverine or an inhibitory activity on calcium entry via potential-operated channels. All the alkaloids tested totally or partially relaxed KCl-depolarized rat uterus and inhibited oxytocin-induced rhythmic contractions. Only glaucine and laudanosine inhibited K+-induced uterine contractions more than oxytocin-induced uterine contractions. In Ca+-free medium, sustained contractions induced by oxytocin or vanadate were relaxed by the alkaloids tested except for glaucine and laudanosine indicating no inhibitory effect on intracellular calcium release. Those alkaloids containing an unsaturated heterocyclic ring (papaverine, papaverinol, papaveraldine, N-methylpapaverine and dehydropapaverine) exhibited a more specific activity than those with a tetrahydroisoquinoline ring.
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Affiliation(s)
- E Anselmi
- Departamento de Farmacologia, Facultad de Farmacia, Universidad de Valencia, Spain
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4
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Ohashi Y, Sumikura H, Tateda T. Inhibitory effect of alprostadil against sevoflurane-induced myometrial relaxation in rats. J Anesth 2007; 21:361-6. [PMID: 17680189 DOI: 10.1007/s00540-007-0536-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2006] [Accepted: 04/11/2007] [Indexed: 10/23/2022]
Abstract
PURPOSE For anesthetic management of cesarean sections, regardless of the use of regional or general anesthesia, it is crucial to achieve sufficient uterine contraction immediately following the delivery of an infant in order to reduce excessive bleeding. No previous study has investigated the ability of alprostadil, a synthesized prostaglandin, to inhibit myometrial relaxation induced by volatile anesthetics. The aim of the present study was to investigate the inhibitory effects of alprostadil on sevoflurane-induced myometrial relaxation using myometrial strips isolated from pregnant rats. METHODS Myometrial strips were isolated from Sprague-Dawley rats (300-400 g) in the late stage of gestation (19-21 days). The time course of changes in spontaneous myometrium contraction was studied in the presence and absence of sevoflurane. Additionally, alprostadil was titrated at three different concentrations during continuous introduction of sevoflurane 2%, and myometrium contraction was studied. As an index of contraction, the area under the contraction curve was used, and data were analyzed by repeated measure one-way analysis of variance. RESULTS We have shown a significant decrease in myometrium contraction as a result of the use of sevoflurane (2%). Additionally, alprostadil has been shown to inhibit myometrial relaxation induced by sevoflurane in a dose-dependent manner. The areas under the contraction curve were 87%, 87%, 129%, and 172% of the baseline value for the control and at low, medium, and high concentrations of alprostadil, respectively. CONCLUSION The ability of alprostadil to inhibit myometrial relaxation induced by sevoflurane suggests that the use of alprostadil during general anesthesia for cesarean section may be advantageous for the reduction of postpartum bleeding.
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Affiliation(s)
- Yayoi Ohashi
- Department of Anesthesiology, St. Marianna University School of Medicine Hospital, 2-16-1 Sugao, Kawasaki, Kanagawa 216-8511, Japan
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Campos M, Oropeza M, Ponce H, Fernández J, Jimenez-Estrada M, Torres H, Reyes-Chilpa R. Relaxation of uterine and aortic smooth muscle by glaucolides D and E from Vernonia liatroides. Biol Pharm Bull 2003; 26:112-5. [PMID: 12520187 DOI: 10.1248/bpb.26.112] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Vernonia spp. (Asteraceae) are used in herbolaria in Latin America in menstrual and stomach disorders, suggesting smooth muscle relaxing properties of some of their chemical constituents. For pharmacological support for this belief, sesquiterpene lactones glaucolides D and E were assayed on isolated rat smooth muscle. Glaucolide E proved more potent than glaucolide D to relax high KCl- or noradrenaline-induced contractions in aorta and to relax the high KCl-contraction in uterus. Hirsutinolide-type sesquiterpene lactone also was tested but displayed no effect. Relaxation of smooth muscle by structurally related sesquiterpene lactone parthenolide has been attributed mainly to the alpha-methylene gamma-lactone moiety; because glaucolides D and E lack this functional group, their relaxant properties may rely on other alkylating sites such as C10 of the germacra-1(10),4-diene-4-epoxide skeleton.
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Affiliation(s)
- María Campos
- Unit of Medical Research in Pharmacology, National Medical Center S. XXI, Mexican Institute of Social Security, San Francisco 350-502, Col. Del Valle, Mexico City 03100, Mexico.
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Chang KJ, Kim JW, Im WB, Kang HM, Kwon HB. Differential effects of gonadotropin and orthovanadate on oocyte maturation, ovulation, and prostaglandin synthesisby Rana ovarian follicles in vitro. ACTA ACUST UNITED AC 1997. [DOI: 10.1002/(sici)1097-010x(19970201)277:2<155::aid-jez7>3.0.co;2-o] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Perez-Guerrero C, Herrera MD, Marhuenda E. Relaxant effect of tetrazepam on rat uterine smooth muscle: role of calcium movement. J Pharm Pharmacol 1996; 48:1169-73. [PMID: 8961167 DOI: 10.1111/j.2042-7158.1996.tb03915.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Tetrazepam is a benzodiazepine derivative clinically used as a muscle relaxant. The aim of the present work was to examine its effect on uterine smooth muscle of the rat in estrus. Tetrazepam required micromolar concentrations to relax contractile responses induced by KCl and acetylcholine in Ca2+ solution, but not oxytocin-induced contraction. In Ca(2+)-free solution, tetrazepam inhibited Ca(2+)-induced contractions in depolarized uterus and vanadate-induced contractions. We suggest that tetrazepam relaxes contractile responses induced by activation of voltage-sensitive calcium channels and receptor-operated calcium channels with little selectivity or that it antagonizes the effect of calcium at subsequent steps, possibly intracellular stores sensitive to vanadate but not sensitive to oxytocin. The inhibition of contraction of rat uterus is not related to high-affinity peripheral benzodiazepine binding sites.
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Affiliation(s)
- C Perez-Guerrero
- Departamento de Farmacologia, Facultad de Farmacia, Universidad de Sevilla, España
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8
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Blázquez MA, Catret M, Zafra-Polo MC. Effects on rat uterine and aorta strip smooth muscle of Thymus leptophyllus extract. JOURNAL OF ETHNOPHARMACOLOGY 1995; 45:59-66. [PMID: 7739228 DOI: 10.1016/0378-8741(94)01197-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The diethylether extract from Thymus leptophyllus was found to be more active on uterine smooth muscle than on aorta strips. Rat uterus experiments with and without extracellular calcium, yielded similar IC50 values. A nonspecific mechanism for the relaxant activity can therefore be postulated. In rat aorta and in the presence of extracellular calcium the extract inhibited the contractile response induced by K+ depolarizing solution and had a less inhibitory effect on noradrenaline (NA) contraction. In a Ca(2+)-free solution the extract strongly reduced the Ca(2+)-release induced by NA, but it did not affect the transient contraction caused by caffeine (CAF).
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Affiliation(s)
- M A Blázquez
- Departamento de Farmacología, Facultat de Farmacia, Universitat de València, Spain
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Maggi M, Baldi E, Susini T. Hormonal and local regulation of uterine activity during parturition: Part II--The prostaglandin and adrenergic systems. J Endocrinol Invest 1994; 17:757-70. [PMID: 7868821 DOI: 10.1007/bf03347772] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- M Maggi
- Clinical Physiopathology Dept., University of Florence, Italy
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10
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Zafra-Polo MC, Tormos MJ, Cortes D, Anselmi E. Comparative study of the rat uterine smooth muscle relaxant activity of three bisbenzyltetrahydroisoquinolines with tetrandrine. J Pharm Pharmacol 1993; 45:563-6. [PMID: 8103106 DOI: 10.1111/j.2042-7158.1993.tb05599.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The relaxant activity of three bisbenzyltetrahydroisoquinolines--obaberine, popisonine and lindoldhamine--was examined in rat isolated uterus and their inhibitory potencies were compared with that of tetrandrine. All alkaloids tested relaxed KCl-depolarized rat uterus and totally or partially inhibited oxytocin-induced rhythmic contractions. The degree of methylation of the free phenolic hydroxy groups and the loss of one diarylether bridge influence the potency of relaxant action of these alkaloids. Only alkaloids with absolute configuration 1R,1'S or 1R1'R acted intracellularly, promoting relaxation of contractile responses induced by oxytocin or vanadate in a Ca(2+)-free medium.
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Affiliation(s)
- M C Zafra-Polo
- Departamento de Farmacologia, Facultad de Farmacia, Universidad de Valencia, Spain
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Ivorra MD, Martinez F, Serrano A, D'Ocon P. Different mechanism of relaxation induced by aporphine alkaloids in rat uterus. J Pharm Pharmacol 1993; 45:439-43. [PMID: 8099963 DOI: 10.1111/j.2042-7158.1993.tb05572.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We have examined the uterine relaxant action of three aporphine molecules (S-glaucine, S-boldine and R-apomorphine) in two experimental conditions, with and without calcium in the bathing solution, and compared these effects with those obtained with the calcium antagonists verapamil and diltiazem. The present study shows that the alkaloids relax the uterine muscle but with different mechanisms of action. In Ca(2+)-containing solution all three alkaloids relaxed the uterus previously contracted by KCl or acetylcholine, but in Ca(2+)-free medium only R-apomorphine was able to relax oxytocin-induced contraction. The calcium antagonists, verapamil and diltiazem, relaxed KCl- or acetylcholine-induced contraction in Ca(2+)-containing solution, whereas they only relaxed oxytocin-induced contraction in Ca(2+)-free medium at much higher doses. These results suggest that glaucine and boldine behave as specific calcium entry blockers without affecting the contractile machinery or intracellular Ca2+ levels as apomorphine does. The absolute configuration (S-glaucine and S-boldine vs R-apomorphine) may account for this different action.
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Affiliation(s)
- M D Ivorra
- Department de Farmacologia, Facultat de Farmacia, Universitat de Valencia, Spain
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12
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Ivorra MD, Cercós A, Zafra-Polo MC, Perez-Prieto J, Sáez J, Cortes D, D'Ocon P. Selective chiral inhibition of Ca2+ entry promoted by bisbenzyltetrahydroisoquinolines in rat uterus. Eur J Pharmacol 1992; 219:303-9. [PMID: 1425956 DOI: 10.1016/0014-2999(92)90310-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The effects of diltiazem and six bisbenzyltetrahydroisoquinoline alkaloids (antioquine, 7-O-methylantioquine, dimethylantioquine, monterine, granjine and cordobimine) were studied in rat isolated uterus in order to clarify the mechanisms of their relaxant actions. All the compounds tested completely relaxed KCl-induced contractions and totally or partially inhibited oxytocin-induced rhythmic contractions. Only alkaloids with absolute configurations (1R,1'S or 1R,1'R) acted intracellularly, promoting relaxation of contractile responses induced by oxytocin in a Ca(2+)-free medium, as does papaverine. Alkaloids of the antioquine series (1S,1'R) selectively inhibited Ca2+ entry. The great rigidity of these structures and their stereoselective action make these alkaloids useful in studies of the conformational features of the Ca2+ channel.
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Affiliation(s)
- M D Ivorra
- Department de Farmacologia, Facultat de Farmacia, Universitat de València, Spain
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13
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D'Ocon P, Blasco R, Candenas L, Ivorra D, López S, Villaverde C, Castedo L, Cortes D. Inhibition of calcium entry induced by cularines and isocrasifoline in uterine smooth muscle. Eur J Pharmacol 1991; 196:183-7. [PMID: 1874285 DOI: 10.1016/0014-2999(91)90426-q] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The effects of nifedipine, papaverine and four benzylisoquinoline alkaloids (cularine, cularidine, celtisine and isocrasifoline) were studied in isolated rat uterus in order to clarify the mechanism of their relaxant action. All the compounds tested completely relaxed KCl-induced contractions and totally or partially inhibited oxytocin-induced rhythmic contractions. Only papaverine acted intracellularly, promoting relaxation of contractile responses induced by oxytocin or vanadate in a Ca(2+)-free medium. In spite of the structural relationship between papaverine and the other alkaloids, the mechanism of their relaxant action is not the same. The activities of cularine derivatives and of isocrasifoline were similar to that of nifedipine.
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Affiliation(s)
- P D'Ocon
- Departamento de Farmacología y Farmacotecnia, Facultad de Farmacia, Universidad de Valencia, Spain
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Missiaen L, Kanmura Y, Eggermont JA, Casteels R. TPA- and agonist-induced force development in myometrium from pregnant and non-pregnant rats. Biochem Biophys Res Commun 1989; 158:302-6. [PMID: 2912451 DOI: 10.1016/s0006-291x(89)80212-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
In myometrium from pregnant rats, 100 nM-TPA elevated resting tension and initially slightly enhanced the contraction induced by 138 mM-KCl. After 20 min this force development significantly declined. In saponin-treated skinned myometrial cells from pregnant rats, 100 nM-TPA enhanced the contraction induced by 0.3 microM-Ca2+, but reduced that induced by 1 microM-Ca2+. These findings suggest that the excitatory and inhibitory actions of TPA on the myometrium are probably due to its action on the contractile proteins. In myometrium from non-pregnant rats, TPA affected neither the resting tension, nor the amplitude of the evoked contractions, nor the Ca2+-induced contractions in skinned myometrium. While TPA only affected tension development in pregnant rats, both 1 mM-carbachol and 90 nM-oxytocin induced a tonic contraction in Ca-free solution independently of the hormonal status of the rats. The latter finding makes it unlikely that activation of protein kinase C is involved in the agonist-induced tonic force development in Ca-free solution.
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Affiliation(s)
- L Missiaen
- Laboratorium of Physiology, K.U.Leuven Campus Gasthulsberg, Belgium
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