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Cabanillas B, Vásquez-Ocmín P, Zebiri I, Rengifo E, Sauvain M, Le H, Vaisberg A, Voutquenne-Nazabadioko L, Haddad M. A new 5-alkylresorcinol glucoside derivative fromCybianthus magnus. Nat Prod Res 2015; 30:293-8. [DOI: 10.1080/14786419.2015.1056188] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Rivaud M, Mendoza A, Sauvain M, Valentin A, Jullian V. Short synthesis and antimalarial activity of fagaronine. Bioorg Med Chem 2012; 20:4856-61. [PMID: 22766218 DOI: 10.1016/j.bmc.2012.05.061] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 05/22/2012] [Accepted: 05/25/2012] [Indexed: 10/28/2022]
Abstract
Herein, we report a new synthesis of fagaronine 1, inspired by the synthesis reported by Luo for nornitidine. The in vitro biological activity of fagaronine against malaria on several chloroquine-sensitive and resistant Plasmodium falciparum strains was confirmed, and the selectivity index compared to mammalian cells was calculated. Fagaronine was found to have very good antimalarial activity in vivo, comparable to the activity of the reference compound chloroquine. Therefore, fagaronine appears to be a good potential lead for the design of new antimalarial molecules.
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Affiliation(s)
- M Rivaud
- Université de Toulouse, UPS, UMR 152 (Laboratoire Pharmadev), Faculté de Pharmacie, 35, chemin des maraîchers, F-31062 Toulouse cedex 9, France
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Odonne G, Herbette G, Eparvier V, Bourdy G, Rojas R, Sauvain M, Stien D. Antileishmanial sesquiterpene lactones from Pseudelephantopus spicatus, a traditional remedy from the Chayahuita Amerindians (Peru). Part III. J Ethnopharmacol 2011; 137:875-9. [PMID: 21771652 DOI: 10.1016/j.jep.2011.07.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Revised: 06/22/2011] [Accepted: 07/03/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The study of traditional remedies used by the Chayahuita, an ethnic group from the Peruvian Amazonia, has prompted us to investigate in detail the ethanolic extract of Pseudelephantopus spicatus (Juss. ex Aubl.) C.F. Baker, which has demonstrated strong biological activity towards Leishmania amazonensis. Our goal was to discover the active compound of this plant-based remedy. MATERIALS AND METHODS A bioguided fractionation of the crude extract was undertaken based on the biological activity recorded against Leishmania amazonensis axenic amastigotes in in vitro bioassays. RESULTS Three strongly to moderately active compounds were isolated: two hirsutinolides (the 8,13-diacetyl-piptocarphol and the 8-acetyl-13-O-ethyl-piptocarphol) and ursolic acid. IC(50) against Leishmania amazonensis axenic amastigotes are respectively 0.2, 0.37 and 0.99 μM (while IC(50) of amphotericin B is 0.41 μM). These compounds have never been isolated from this plant species, and germacranolides have never been identified as potential antileishmanial agents. CONCLUSIONS The compounds isolated from Pseudelephantopus spicatus account for the antileishmanial activity of the plant, thus giving support to its use by the Chayahuita in Peru.
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Affiliation(s)
- G Odonne
- CNRS - UMR Ecofog, Université des Antilles et de la Guyane, BP792, 97337 Cayenne cedex, France.
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Odonne G, Bourdy G, Castillo D, Estevez Y, Lancha-Tangoa A, Alban-Castillo J, Deharo E, Rojas R, Stien D, Sauvain M. Ta'ta', Huayani: perception of leishmaniasis and evaluation of medicinal plants used by the Chayahuita in Peru. Part II. J Ethnopharmacol 2009; 126:149-58. [PMID: 19631728 DOI: 10.1016/j.jep.2009.07.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2009] [Revised: 06/10/2009] [Accepted: 07/12/2009] [Indexed: 05/16/2023]
Abstract
AIM OF THE STUDY A knowledge attitude and practice study centred on leishmaniasis and its treatment was performed among the Chayahuita, an Amazonian Peruvian ethnic group living in an endemic area. This study documents traditional Chayahuita plant's use and disease concepts. Also, activity of some medicinal plants used by the Chayahuita is highlighted and discussed. MATERIALS AND METHODS Ninety-three Chayahuita people were interviewed, following a semi-structured questionnaire focussed on disease knowledge and perception, personal attitude and healing practices. Simultaneously, a collection of plants was performed in different ecotopes, in order to make an extensive inventory of the pharmacopoeia. RESULTS For the Chayahuita, cutaneous (CL) and muco-cutaneous leishmaniasis (MCL) are considered as diseases of their own, with specific names, aetiologies, mode of transmission. Regarding CL, Chayahuita people consider that the humid characteristic of the skin ulcer is a discriminative fact orienting the diagnostic forTa'ta' (leishmaniasis). Forty-six different species were designated useful against LC and /or MCL (29 species by means of the questionnaire and 27 species when collecting in different ecotopes). Thirty-seven extracts corresponding to 31 species used medicinally were screened in vitro against Leishmania amazonensis axenic amastigotes, assessing their viability by the reduction of tetrazolium salt (MTT). Six species displayed a good activity (10 microg/ml<IC50<20 microg/ml): an undetermined hemi-epiphytic Clusiaceae, Cybianthus anthuriophyllus Pipoly (Myrsinaceae), two Piper, Piper sanguineispicum Trel., and Piper loretoanum Trel. (Piperaceae), Desmodium axillare Sw. DC. (Fabaceae), and Clibadium sylvestre (Aubl.) Baill. (Asteraceae). CONCLUSION Perception of leishmaniasis, attitude, treatments and diet prohibitions still largely reflects traditional Chayahuita cosmovision, even if some tentative of bio-medical re-interpretation is arising.
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Affiliation(s)
- G Odonne
- UMR EcoFoG, Université des Antilles et de la Guyane - CNRS, 2091 Route de Baduel - BP792, 97337, Cayenne Cedex, France
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Estevez Y, Castillo D, Pisango MT, Arevalo J, Rojas R, Alban J, Deharo E, Bourdy G, Sauvain M. Evaluation of the leishmanicidal activity of plants used by Peruvian Chayahuita ethnic group. J Ethnopharmacol 2007; 114:254-9. [PMID: 17889471 DOI: 10.1016/j.jep.2007.08.007] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2007] [Revised: 08/02/2007] [Accepted: 08/03/2007] [Indexed: 05/17/2023]
Abstract
AIM OF THE STUDY A total of 27 ethanolic plant extracts from 27 species were screened for leishmanicidal activity in vitro against Leishmania amazonensis. Most of the selected species (19) are traditionally used by the Chayahuitas, an Amazonian Peruvian ethnic group, to treat skin affections and/or leishmaniasis. MATERIAL AND METHODS A colorimetric method based on the reduction of tetrazolium salt (MTT) was used to measure the viability of Leishmania amazonensis promastigote and amastigote stages. RESULTS AND CONCLUSIONS Only the leaves of two species of the Piperaceae family (Piper hispidum Sw., and Piper strigosum Trel.) showed good leishmanicidal activities (IC(50)<10 microg/ml against amastigotes). Roots of Tabernaemontana sananho Ruiz & Pav. (Apocynaceae), together with bark of Vismia tomentosa Ruiz & Pav. (Clusiaceae), fruits of Solanum straminifolium var straminifolium Jacq. (Solanaceae), and stems of Zamia lindenii Regel ex André (Cycadaceae) showed low activity against amastigote stage (IC(50) around 50 microg/ml). Of those only Tabernaemontana sananho displayed also good activity on promastigotes (IC(50)<10 microg/ml). Results are discussed herein, in relation with the traditional use of the plants and compared with other data from the relevant literature.
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Affiliation(s)
- Y Estevez
- UMR 152 IRD-Université de Toulouse III, Mission IRD, Casilla 18, 1209 Lima 18, Peru
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Castillo D, Arevalo J, Herrera F, Ruiz C, Rojas R, Rengifo E, Vaisberg A, Lock O, Lemesre JL, Gornitzka H, Sauvain M. Spirolactone iridoids might be responsible for the antileishmanial activity of a Peruvian traditional remedy made with Himatanthus sucuuba (Apocynaceae). J Ethnopharmacol 2007; 112:410-4. [PMID: 17459622 DOI: 10.1016/j.jep.2007.03.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2006] [Revised: 03/12/2007] [Accepted: 03/18/2007] [Indexed: 05/15/2023]
Abstract
Extracts of seven medicinal plants used specifically against cutaneous leishmaniasis in the Madre de Dios region of Peru were evaluated in vitro against promastigote and axenic amastigote forms of Leishmania amazonensis. One of them showed interesting leishmanicidal activities (IC(50)=5 microg/ml in amastigotes). Bio-guided isolation of the stem bark's ethanol extract of Himatanthus sucuuba (Spruce ex Müll. Arg.) Woodson (Apocynaceae) afforded the spirolactone iridoids isoplumericin and plumericin. The latter showed a reduction of macrophage infection similar to that of the reference drug Amphotericin B (IC(50)=0.9 and 1 microM, respectively). These findings validate the traditional use of Himatanthus sucuuba in the treatment of cutaneous leishmaniasis (Uta) in Peru.
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Affiliation(s)
- D Castillo
- Instituto de Medicina Tropical "Alexander von Humboldt", Universidad Peruana Cayetano Heredia (UPCH), Av. Honorio Delgado 430, SMP, Lima, Peru
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Jullian V, Bourdy G, Georges S, Maurel S, Sauvain M. Validation of use of a traditional antimalarial remedy from French Guiana, Zanthoxylum rhoifolium Lam. J Ethnopharmacol 2006; 106:348-52. [PMID: 16504432 DOI: 10.1016/j.jep.2006.01.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2005] [Revised: 01/10/2006] [Accepted: 01/13/2006] [Indexed: 05/06/2023]
Abstract
Zanthoxylum rhoifolium bark (Rutaceae) is a medicinal plant, traditionally used in French Guiana to treat and prevent malaria. Bioassay-guided extractions of Zanthoxylum rhoifolium bark have shown that antiplasmodial activity is concentrated in the alkaloid fraction. Further fractionation of this extract has yielded seven benzophenanthridine alkaloids, dihydroavicine 1, dihydronitidine 2, oxyavicine 3, oxynitidine 4, fagaridine 5, avicine 6 and nitidine 7. Antimalarial activity of the last five compounds has been evaluated, and nitidine was the most potent, displaying an IC(50)<0.27microM against Plasmodium falciparum. Investigation of the traditional remedy, a trunk bark decoction in water, has shown that fagaridine 5, avicine 6 and nitidine 7 are also present in the decoction, therefore justifying the traditional use of Zanthoxylumrhoifolium bark as antimalarial.
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Affiliation(s)
- V Jullian
- Laboratoire de Pharmacochimie des Substances Naturelles et Pharmacophores Redox, UMR-152 IRD - Université Paul Sabatier, Centre IRD de Cayenne, BP 165, 97323 Cayenne, Guyane, France
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Deharo E, García RN, Oporto P, Gimenez A, Sauvain M, Jullian V, Ginsburg H. A non-radiolabelled ferriprotoporphyrin IX biomineralisation inhibition test for the high throughput screening of antimalarial compounds. Exp Parasitol 2002; 100:252-6. [PMID: 12128052 DOI: 10.1016/s0014-4894(02)00027-9] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Intraerythrocytic malaria parasites produce large amounts of toxic ferriprotoporphyrin IX (FP) during their digestion of host cell haemoglobin. The inhibition of biomineralisation of FP to haemozoin (or beta-haematin) by antimalarial drugs underlies their mode of action. We have developed an in vitro microassay for testing the inhibition of biomineralisation by drugs. It is based on the detection by optical density measurement of solubilised beta-haematin remaining after contact with drugs. The assay uses a 192-microM haemin chloride solution in dimethyl sulfoxide, 96-well filtration microplates as well as normal microplates; it lasts 18-24h and requires a spectrophotometer. We determined by this assay the IC(50) of chloroquine phosphate (28microM) and quinine base (324microM) and showed that unlike previous methods it is insensitive to inorganic anions. We also determined the activity of synthetic dyes and plant extract to determinate the interference of coloured compounds on the accuracy of the test. We found that methylene blue, thionine (IC(50) 38 and 87microM, respectively), and an extract of plants that contains quinoline derivatives, inhibited the biomineralisation of FP regardless of their intrinsic colour.
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Affiliation(s)
- E Deharo
- Institut de Recherche pour le Développement (I.R.D.), No. 5290, Av. Hernando Siles CP 9214 La Paz, Bolivia.
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Mitaine-Offer AC, Sauvain M, Valentin A, Callapa J, Mallié M, Zèches-Hanrot M. Antiplasmodial activity of aspidosperma indole alkaloids. Phytomedicine 2002; 9:142-145. [PMID: 11995947 DOI: 10.1078/0944-7113-00094] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The antiplasmodial activity of twelve alkaloids with an aspidospermane skeleton was estimated in vitro on chloroquine-resistant and sensitive strains of Plasmodium falciparum. Seven tetracyclic alkaloids possessing a free ethyl chain such aspidospermine, showed IC50 after incubation for 72 h between 3.2 and 15.4 microM. Moreover, four pentacyclic alkaloids with ethyl chain included in a tetrahydrofuran, such haplocine, showed a reduced activity, with IC50, after 72 h, between 22.6 and 52.6 microM. According to these results, a chloroquine-potentiating experiment was also performed with two of the most active compounds. Isobolograms were obtained and demonstrated a synergic effect of N-formyl-aspidospermidine and aspidospermine when associated with chloroquine. The cytotoxicity and the selectivity index of some alkaloids were also estimated.
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Affiliation(s)
- A C Mitaine-Offer
- Laboratoire de Pharmacognosie, Faculté de Pharmacie, Université de Reims Champagne-Ardenne, France.
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Abstract
The isolation of 14 known triterpenoids and phytosterols from the trunk bark of Maquira coriacea, and complete spectral data of a cardenolide, k-strophanthin-beta (1), are reported.
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Affiliation(s)
- A C Mitaine-Offer
- Laboratoire de Pharmacognosie, UMR 6013 CNRS, CPCBAI, Bât. 18, Moulin de la Housse, BP 1039, 51087, Reims cedex, France.
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Weniger B, Um BH, Valentin A, Estrada A, Lobstein A, Anton R, Maillé M, Sauvain M. Bioactive acridone alkaloids from Swinglea glutinosa. J Nat Prod 2001; 64:1221-1223. [PMID: 11575960 DOI: 10.1021/np0005762] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A new prenylated acridone alkaloid, 1,3,5-trihydroxy-2,8-bis(3-methylbut-2-enyl)-10-methyl-9-acridone (1), was isolated from the stembark of Swinglea glutinosa, along with three known acridone alkaloids, 5-hydroxynoracronycine (2), 1,3,5-trihydroxy-4-methoxy-2-(3-methylbut-2-enyl)-10-methyl-9-acridone (3), and 1,3,5-trihydroxy-4-methoxy-10-methylacridone (4). The isolated alkaloids were assessed in vitro against chloroquine-sensitive and -resistant Plasmodium falciparum strains and for cytotoxicity using HeLa cells.
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Affiliation(s)
- B Weniger
- UMR 7081, Faculté de Pharmacie, Université Louis Pasteur Strasbourg, BP 24, 67401 Illkirch Cedex, France.
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12
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Deharo E, Bourdy G, Quenevo C, Muñoz V, Ruiz G, Sauvain M. A search for natural bioactive compounds in Bolivia through a multidisciplinary approach. Part V. Evaluation of the antimalarial activity of plants used by the Tacana Indians. J Ethnopharmacol 2001; 77:91-98. [PMID: 11483383 DOI: 10.1016/s0378-8741(01)00270-7] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
One hundred and twenty-five extracts of 122 different plant species traditionally used by the Tacana, a native community living in lowland forest at the base of the last foothills of the Cordillera Oriental of the Bolivian Andes, were screened for antimalarial activity in vitro on Plasmodium falciparum chloroquine resistant (D2) and sensitive strains (F32), and were evaluated in vivo on rodent malaria Plasmodium berghei. Five ethanolic stembark extracts showed marked activity either in vitro or in vivo, and only one of them, Bowdichia virgilioides being traditionally used against malaria, was active in vitro (IC50=1 microg/ml on both strains) and in vivo (51% at 100 mg/kg). Other active extracts were from Caesalpinia pluviosa bark displaying activity in vitro against chloroquine resistant strain (IC50 8.3 microg/ml), traditionally used against dysentery; two Lauraceae bark extracts, Nectandra aff. hihua and Licaria canella respectively used for construction purposes and against stomach ache, both displaying activity in vitro against P. falciparum sensible and resistant strains (IC50 around 4 microg/ml); finally, the bark of a strongly aromatic Burseraceae, Protium glabrescens exuding an anti-inflammatory and analgesic resin, was active in vivo only (61% at 100 mg/kg). Results are discussed in relation with Tacana traditional medicine.
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Affiliation(s)
- E Deharo
- Institut de Recherche pour le Développement (IRD), CP 9214, La Paz, Bolivia.
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Bravo B JA, Sauvain M, Gimenez T A, Balanza E, Serani L, Laprévote O, Massiot G, Lavaud C. Trypanocidal withanolides and withanolide glycosides from Dunalia brachyacantha. J Nat Prod 2001; 64:720-725. [PMID: 11421731 DOI: 10.1021/np000527p] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Two new withanolide glycosides, (20R,22R)-O-(3)-alpha-L-rhamnopyranosyl(1-->4)-beta-D-glucopyranosyl-1 alpha,12 beta-diacetoxy-20-hydroxywitha-5,24-dienolide (3) and (20R,22R)-O-(3)-beta-D-xylopyranosyl(1-->3)-[beta-D-xylopyranosyl(1-->4)]-beta-D-glucopyranosyl-1 alpha-acetoxy-12 beta,20-dihydroxywitha-5,24-dienolide (4), were isolated from the leaves and root of Dunalia brachyacantha. Their aglycones, (20R,22R)-1 alpha,12 beta-diacetoxy-3 beta,20-dihydroxywitha-5,24-dienolide (or 1 alpha,12 beta-diacetyldunawithagenine) and (20R,22R)-1 alpha-acetoxy-3 beta,12 beta,20-trihydroxywitha-5,24-dienolide (or 1 alpha-acetyl-12 beta-hydroxydunawithagenine), are novel. The known 18-acetoxywithanolide D (1) and 18-acetoxy-5,6-deoxy-5-withenolide D (2) were also isolated from the leaves. These last two compounds were shown to be responsible for the trypanocidal, leishmanicidal, and bactericidal activities manifested by the crude ethanolic extract. The structures were deduced from spectroscopic data and on the basis of chemical evidence.
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Affiliation(s)
- J A Bravo B
- Laboratorio de Productos Naturales, Instituto de Investigaciones Químicas, CP 303, Universidad Mayor de San Andrés, La Paz, Bolivia
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Baelmans R, Deharo E, Muñoz V, Sauvain M, Ginsburg H. Experimental conditions for testing the inhibitory activity of chloroquine on the formation of beta-hematin. Exp Parasitol 2000; 96:243-8. [PMID: 11162377 DOI: 10.1006/expr.2000.4558] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Some antimalarial drugs act by inhibiting the process of ferriprotoporphyrin IX polymerization which protects the parasite against the noxious effect of this product of host cell hemoglobin digestion. As the quest for new drugs with a similar mode of action continues, high-throughput screening methods are needed. We demonstrate herein that such a recently described screening technique (Basilico et al., J. Antimicrob. Chemother. 42, 55-60, 1998) is considerably disturbed by certain ions. Thus, at the assay's pH 2.6, the phosphate ions are responsible for the inhibitory activity of chloroquine phosphate, rather than chloroquine itself. Using a combination of solubility tests and Fourier transform infrared spectrometry we also show that two alternative methods using higher pH's are also prone to salt effects and demonstrate that these can be minimized by extensive washing of the product with DMSO.
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Affiliation(s)
- R Baelmans
- Instituto Boliviano de Biologia de Altura (IBBA), Casilla 717, La Paz, Bolivia
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Baelmans R, Deharo E, Bourdy G, Muñoz V, Quenevo C, Sauvain M, Ginsburg H. A search for natural bioactive compounds in Bolivia through a multidisciplinary approach. Part IV. Is a new haem polymerisation inhibition test pertinent for the detection of antimalarial natural products? J Ethnopharmacol 2000; 73:271-275. [PMID: 11025165 DOI: 10.1016/s0378-8741(00)00330-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The search for new antimalarial agents in plant crude extracts using traditional screening tests is time-consuming and expensive. New in vitro alternative techniques, based on specific metabolic or enzymatic process, have recently been developed to circumvent testing of antimalarial activity in parasite culture. The haem polymerisation inhibition test (HPIA) was proposed as a possible routine in vitro assay for the detection of antimalarial activity in natural products. A total of 178 plant extracts from the Pharmacopeia of the Bolivian ethnia Tacana, were screened for their ability to inhibit the polymerisation of haematin. Five extracts from Aloysia virgata (Ruíz & Pavón) A.L. Jussieu (Verbenaceae), Bixa orellana L. (Bixaceae), Caesalpinia pluviosa D.C. (Caesalpiniaceae), Mascagnia stannea (Griseb) Nied. (Malpighiaceae) and Trichilia pleenea (Adr. Jussieu) (Meliaceae) demonstrated more than 70% inhibition of haematin polymerisation at 2.5 mg/ml. The extracts were also tested for antimalarial activity in culture against F32 strain (chloroquine-sensitive) and D2 strain (chloroquine-resistant) of Plasmodium falciparum and in vivo against P. berghei. The extract from Caesalpinia pluviosa was the only one that showed activity in HPIA and in the classical test in culture. The accuracy and pertinence of HPIA, applied to natural products is discussed.
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Affiliation(s)
- R Baelmans
- Instituto Boliviano de Biologia de Altura (IBBA), Casilla 717, La Paz, Bolivia
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Muñoz V, Sauvain M, Bourdy G, Arrázola S, Callapa J, Ruiz G, Choque J, Deharo E. A search for natural bioactive compounds in Bolivia through a multidisciplinary approach. Part III. Evaluation Of the antimalarial activity of plants used by Alteños Indians. J Ethnopharmacol 2000; 71:123-131. [PMID: 10904155 DOI: 10.1016/s0378-8741(99)00191-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A total of 40 plant extracts traditionally used by the Alteños Indians, a native community living between the Andean block and the tropical valleys of Bolivia, were screened for antimalarial activity in vitro on Plasmodium falciparum chloroquine resistant (Indo) strain, and in vivo on rodent malaria Plasmodium vinckei petteri. Eleven extracts displayed good or moderate activity in vivo, and ten extracts good or very good antimalarial activity in vitro. Results of the screening are discussed here, in relation with the traditional use of plants.
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Affiliation(s)
- V Muñoz
- Instituto Boliviano de Biologia de Altura (IBBA) CP641, La Paz, Bolivia
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Muñoz V, Sauvain M, Bourdy G, Callapa J, Rojas I, Vargas L, Tae A, Deharo E. The search for natural bioactive compounds through a multidisciplinary approach in Bolivia. Part II. Antimalarial activity of some plants used by Mosetene indians. J Ethnopharmacol 2000; 69:139-155. [PMID: 10687870 DOI: 10.1016/s0378-8741(99)00096-3] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Forty-six different species collected in the Mosetene ethnia, dwelling in the Andean Piedmont of Bolivia, were screened for antimalarial properties. Thirty-three extracts were screened for antimalarial activity in vitro on Plasmodium falciparum chloroquine resistant strain (Indo), and forty-seven extracts were evaluated in vivo on the rodent malaria P. vinckei petteri 279BY. Only two plants are specifically used in combination by the Mosetene against malaria attack (Hymenachne donacifolia and Tesseria integrifolia), but they did not display any activity in vivo at 1000 mg/kg. The in vivo most active extracts were Swietenia macrophylla bark, Trema micrantha bark and Triplaris americana bark, not all of them were used for antimalarial purposes by the Mosetene. The following extracts were moderately active: Jacaratia digitata inner bark and Momordica charantia aerial part (both traditionally used as febrifuge), Kalanchoe pinnate aerial part (used in inflammatory processes), Lunania parviflora twigs and leaves, Phyllanthus acuminatus (used as piscicide), Tynanthus schumannianus fruit (used against diarrhoea), Triumfetta semitrilobata (used as febrifuge, to alleviate kidney and gynecological pain) and finally Solanum mammosum fruit (used against scabies). We present here the results of this screening, emphazing on the in vivo antimalarial activity of the selected plants. The antimalarial in vivo activity of the selected species, in relation with their traditional Mosetene use is then discussed.
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Affiliation(s)
- V Muñoz
- Instituto Boliviano de Biologia Andina, Casilla, La Paz, Bolivia
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Muñoz V, Sauvain M, Bourdy G, Callapa J, Bergeron S, Rojas I, Bravo JA, Balderrama L, Ortiz B, Gimenez A, Deharo E. A search for natural bioactive compounds in Bolivia through a multidisciplinary approach. Part I. Evaluation of the antimalarial activity of plants used by the Chacobo Indians. J Ethnopharmacol 2000; 69:127-137. [PMID: 10687869 DOI: 10.1016/s0378-8741(99)00148-8] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Thirty extracts of plants traditionally used by the Chacobos, a native community living in the Amazonian part of Bolivia, were screened in vitro and/or in vivo for antimalarial activity. Two of the four species designated as antimalarial, Geissospermum laeve and Maquira coriacea, displayed rather good activity, corroborating their traditional uses. However, they did show a rather high toxicity in vivo. Among twelve species used to cure symptoms relevant to malaria, five showed good activity: Apuleia leiocarpa, Bauhinia guianensis, Nectandra cuspidata, Sparattanthelium amazonum, Tanaecium jaroba. Two species, Qualea paraensis and Sclerolobium aff. guianense, used to treat scabies, showed interesting antimalarial activity in vivo; three other species (Iryanthera laevis, Prunus amplifolia, Pterocarpus aff. amazonum) used for various medicinal purposes, apparently not related with a Plasmodium infection, also showed antimalarial activity. Finally, one species (Derris amazonica) used as a piscicide displayed good in vitro activity, in the same way as one Annonaceae, Guatteria aff. schomburgkiana, used for construction purposes.
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Affiliation(s)
- V Muñoz
- Instituto Boliviano de Biologia de Altura, La Paz, Bolivia
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19
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Muñoz V, Sauvain M, Mollinedo P, Callapa J, Rojas I, Gimenez A, Valentin A, Mallié M. Antimalarial activity and cytotoxicity of (-)-roemrefidine isolated from the stem bark of Sparattanthelium amazonum. Planta Med 1999; 65:448-449. [PMID: 10418333 DOI: 10.1055/s-2006-960808] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
(-)-Roemrefidine, an aporphine alkaloid isolated from Sparattanthelium amazonum Martius (Hernandiaceae) a vine from Bolivia, has been found to be active against both resistant and sensitive strains of Plasmodium falciparum in vitro and against P. berghei in mice. The compound demonstrated no cytotoxic activity against three cell lines (KB, HEp-2 and HeLa).
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Abstract
A new aminosteroid, 3beta-amino-22,26-epiminocholest-5-ene named sarachine (1), and two known flavonoids, eriodictyol (2) and 7-O-beta-D-glucopyranosyl-eriodictyol (3), were isolated from the leaves of Saracha punctata. The alkaloid was found to inhibit the growth of Leishmania braziliensis promastigotes (100% at 25 microM) and of Trypanosoma cruzi epimastigotes in culture (50% at 25 microM) and showed a strong in vitro antiplasmodial activity with an IC50 of 25 nM.
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Affiliation(s)
- C Moretti
- Institut Français de Recherche Scientifique pour le Développement en Coopération (ORSTOM), Unité de Recherche No. 45, 209-213 rue La Fayette 75480 Paris Cedex 10, France
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21
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Galarza Guzmán M, Peñaloza Imaña R, Echalar Afcha L, Aguilar Valerio M, Spielvogel H, Sauvain M. [Effects of coca chewing on the glucose tolerance test]. Medicina (B Aires) 1998; 57:261-4. [PMID: 9640756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The effects of coca chewing on the glucose tolerance test were measured. The subjects were 14 habitual coca chewers and 14 non-chewers. All were of Aymara ancestry and came from a rural community from the "Altiplano" close to the city of La Paz. The coca users chewed coca leaves during 3 1/2 hours of the test. The non-chewers showed a significant hypoglycemia at 120 minutes of the test. This effect was not observed in the coca chewers. The hormonal counter-regulation response to hypoglycemia worked perfectly in non-chewers, since glucose levels reached normal values at 180 minutes of the test. These results suggest that coca chewers, at high altitude do not present hypoglycemia, due to an antagonic action of coca metabolites on insulin; allowing a greater availability of glucose in the organism. This would have a positive effect on metabolism in an environment of hypobaric hypoxia, known to lead to situations of hypoglycemia.
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Affiliation(s)
- M Galarza Guzmán
- Laboratorio de Bioquímica, Instituto Boliviano de Biología de la Altura, Facultad de Medicina, Universidad Mayor de San Andrés, Orstom, Bolivia
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Mitaine AC, Weniger B, Sauvain M, Lucumi E, Aragón R, Zèches-Hanrot M. Indole alkaloids from the trunk bark of Aspidosperma megalocarpon. Planta Med 1998; 64:487. [PMID: 17253271 DOI: 10.1055/s-2006-957496] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Affiliation(s)
- A C Mitaine
- Faculté de Pharmacie, Laboratoire de Pharmacognosie, UPRES-A 6013, Reims, France
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23
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Sauvain M, Rerat C, Moretti C, Saravia E, Arrazola S, Gutierrez E, Lema AM, Muñoz V. A study of the chemical composition of Erythroxylum coca var. coca leaves collected in two ecological regions of Bolivia. J Ethnopharmacol 1997; 56:179-191. [PMID: 9201607 DOI: 10.1016/s0378-8741(97)00030-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Coca-Erythroxylum coca Lamarck var. coca-remains one of the most common plants of the folk medicine of Bolivia used as a general stimulant. Aymara and Quechua natives prefer to chew the sweeter coca leaves from the Yungas (tropical mountain forests of the eastern slopes of the Andes) rather than those from the Chapare lowlands. The contents in cocaine and minor constituents of leaf samples cultivated in these regions does not rationalize this choice.
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Affiliation(s)
- M Sauvain
- Institut Français de Recherche Scientifique pour le Développement en Coopération (ORSTOM), Département Santé, Paris, France
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24
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Rerat C, Sauvain M, Rop PP, Ruiz E, Bresson M, Viala A. Liquid chromatographic analysis of cocaine and benzoylecgonine in plasma of traditional coca chewers from Bolivia during exercise. J Ethnopharmacol 1997; 56:173-178. [PMID: 9201606 DOI: 10.1016/s0378-8741(97)00029-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The purpose of the present study was to determine the amount of cocaine and benzoylecgonine in the plasma of Aymara Indians from the Bolivian Andes after traditional chewing of coca leaves during exercise performance. The determination was carried out by high performance liquid chromatography after solid-liquid extraction. The results showed that such use of coca leaves is well correlated with pharmacologically active concentration of cocaine in plasma.
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Affiliation(s)
- C Rerat
- Instituto Boliviano de Biología de Altura, Universidad Mayor de San Andres, La Paz, Bolivia
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25
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Favier R, Caceres E, Guillon L, Sempore B, Sauvain M, Koubi H, Spielvogel H. Coca chewing for exercise: hormonal and metabolic responses of nonhabitual chewers. J Appl Physiol (1985) 1996; 81:1901-7. [PMID: 8941507 DOI: 10.1152/jappl.1996.81.5.1901] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
To determine the effects of acute coca use on the hormonal and metabolic responses to exercise, 12 healthy nonhabitual coca users were submitted twice to steady-state exercise (approximately 75% maximal O2 uptake). On one occasion, they were asked to chew 15 g of coca leaves 1 h before exercise, whereas on the other occasion, exercise was performed after 1 h of chewing a sugar-free chewing gum. Plasma epinephrine, norepinephrine, insulin, glucagon, and metabolites (glucose, lactate, glycerol, and free fatty acids) were determined at rest before and after coca chewing and during the 5th, 15th, 30th, and 60th min of exercise. Simultaneously to these determinations, cardiorespiratory variables (heart rate, mean arterial blood pressure, oxygen uptake, and respiratory gas exchange ratio) were also measured. At rest, coca chewing had no effect on plasma hormonal and metabolic levels except for a significantly reduced insulin concentration. During exercise, the oxygen uptake, heart rate, and respiratory gas exchange ratio were significantly increased in the coca-chewing trial compared with the control (gum-chewing) test. The exercise-induced drop in plasma glucose and insulin was prevented by prior coca chewing. These results contrast with previous data obtained in chronic coca users who display during prolonged submaximal exercise an exaggerated plasma sympathetic response, an enhanced availability and utilization of fat (R. Favier, E. Caceres, H. Koubi, B. Sempore, M. Sauvain, and H. Spielvogel. J. Appl. Physiol. 80: 650-655, 1996). We conclude that, whereas coca chewing might affect glucose homeostasis during exercise, none of the physiological data provided by this study would suggest that acute coca chewing in nonhabitual users could enhance tolerance to exercise.
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Affiliation(s)
- R Favier
- Instituto Boliviano de Biologia de Altura, Casilla, La Paz, Bolivia
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26
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Schmeda‐Hirschmann G, Razmilic I, Sauvain M, Moretti C, Muñoz V, Ruiz E, Balanza E, Fournet A. Antiprotozoal activity of Jatrogrossidione from
Jatropha grossidentata
and Jatrophone from
Jatropha isabellii
. Phytother Res 1996. [DOI: 10.1002/(sici)1099-1573(199608)10:5<375::aid-ptr847>3.0.co;2-#] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- G. Schmeda‐Hirschmann
- Departamento de Ciencias Biológicas, Universidad de Talca, Casilla 747, Talca, Chile
| | - I. Razmilic
- Departamento de Ciencias Biológicas, Universidad de Talca, Casilla 747, Talca, Chile
| | - M. Sauvain
- Institut Francais de Recherche Scientifique pour le Développement en Coopération (ORSTOM), CP 9214, La Paz, Bolivia
| | - C. Moretti
- Institut Francais de Recherche Scientifique pour le Développement en Coopération (ORSTOM), CP 9214, La Paz, Bolivia
| | - V. Muñoz
- Instituto Boliviano de Biología de Altura (IBBA), CP 717, La Paz, Bolivia
| | - E. Ruiz
- Instituto Boliviano de Biología de Altura (IBBA), CP 717, La Paz, Bolivia
| | - E. Balanza
- Instituto Boliviano de Biología de Altura (IBBA), CP 717, La Paz, Bolivia
| | - A. Fournet
- Institut Francais de Recherche Scientifique pour le Développement en Coopération (ORSTOM), CP 97, Asunción, Paraguay
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Favier R, Caceres E, Koubi H, Sempore B, Sauvain M, Spielvogel H. Effects of coca chewing on hormonal and metabolic responses during prolonged submaximal exercise. J Appl Physiol (1985) 1996; 80:650-5. [PMID: 8929611 DOI: 10.1152/jappl.1996.80.2.650] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The effects of coca chewing on prolonged submaximal exercise responses were investigated in chronic coca chewers and compared with a group of nonchewers. At rest, coca chewing during a 1-h period was followed by a significant increase in blood glucose, free fatty acid, and norepinephrine concentrations and a significant reduction in insulin plasma level. During prolonged (1-h) submaximal (65-70% peak O2 uptake) exercise, chewers displayed a significantly greater adrenergic activation (as evidenced by a higher level of plasma epinephrine) and an increased use of fat (as evidenced by a lower respiratory exchange ratio). The gradual increase in oxygen uptake (O2 drift) commonly observed during prolonged exercise was blunted in coca chewers. This blunting in O2 drift is not related to coca-induced changes in ventilatory or lactate responses to exercise but could possible be related to an enhanced glucose utilization by chewers during the late phase of exercise. The present results provide experimental evidence of the physiological effects of coca chewing that could explain the better ability of coca users to sustain strenuous work for an extended period of time.
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Affiliation(s)
- R Favier
- Instituto Boliviano de Biologia de Altura, La Paz, Bolivia
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Spielvogel H, Caceres E, Koubi H, Sempore B, Sauvain M, Favier R. Effects of coca chewing on metabolic and hormonal changes during graded incremental exercise to maximum. J Appl Physiol (1985) 1996; 80:643-9. [PMID: 8929610 DOI: 10.1152/jappl.1996.80.2.643] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
We examined the effects of 1 h of coca chewing on metabolic and hormonal responses during incremental exercise to exhaustion in traditional coca chewers (C; n = 8), and the results were compared with a group of nonchewers (n = 13). For 1 h, C chewed approximately 12 g of coca leaves that resulted in the apparition of cocaine in blood that reached 72 +/- 9 ng/ml. In resting conditions, even though sympathoadrenergic activity (as assessed by norepinephrine and epinephrine plasma levels) was similar in both groups, C displayed a higher level of plasma free fatty acids. Oxygen uptake measured at exhaustion and delta work efficiency during exercise were similar in both groups. During the incremental exercise, C displayed a significantly lower arterial oxygen saturation that cannot be explained by a reduced ventilatory response after coca chewing. In fact, even at maximal exercise, both ventilatory output and ventilatory equivalent were higher in C compared with nonchewers. It is concluded that the beneficial effects of coca chewing on exercise tolerance reported frequently by traditional coca users is not related to either an improved maximal exercise capacity or an increased work efficiency. However, during incremental exercise, coca chewing appeared to result in an increased free fatty acid availability that could be beneficial for prolonged submaximal exercise.
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Affiliation(s)
- H Spielvogel
- Instituto Boliviano de Biologia de Altura, La Paz, Bolivia
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Abstract
The stem-bark of Dictyoloma peruviana yielded two new piperidino [1,2-a] 4-quinolinones, dictyolomide A and dictyolomide B. Their structures were established by NMR spectroscopy.
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Affiliation(s)
- C Lavaud
- Laboratoire de Pharmacognosie, associé au CNRS-URA 492, Faculté de Pharmacie, Reims, France
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30
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Krugliak M, Deharo E, Shalmiev G, Sauvain M, Moretti C, Ginsburg H. Antimalarial effects of C18 fatty acids on Plasmodium falciparum in culture and on Plasmodium vinckei petteri and Plasmodium yoelii nigeriensis in vivo. Exp Parasitol 1995; 81:97-105. [PMID: 7628573 DOI: 10.1006/expr.1995.1097] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Following the demonstration of the antimalarial effect of the long chain saturated alcohol n-hentriacontanol ((CH2)29CH2OH), isolated from the Bolivian endemic solanaceous plant Cuatresia sp., we have tested the effect of the C18 fatty acids oleic, elaidic, linoleic, and linoleic on malaria parasites. These fatty acids inhibited the parasitemic development in mice infected with Plasmodium vinckei petteri or with Plasmodium yoelii nigeriensis in a 4-day suppressive test. To gain a deeper discernment of the antimalarial mode of action, the effects of these compounds were evaluated on Plasmodium falciparum growth in culture. Whereas n-hentriacontanol did not show any inhibition of this parasite, on the contrary, the C18 acids displayed a considerably inhibitory activity at < or = 200 micrograms/ml both in intact infected cells and in free parasites. In order to understand the mechanism of their antimalarial action, several tests were performed. No hemolysis of infected cells could be observed up to 500 microgram/ml. No effect on the lipid peroxidation, ATP levels, transport through the parasite-induced permeability pathways, or on the phagocytosis of the infected cells could be observed. The cytotoxic effect of the fatty acids was very rapid: full inhibition of nucleic acids and protein syntheses was observed in less than 30 min. This inhibition was not relieved by the addition of deferrioxamine or FeCl3, indicating that fatty acids (FA) do not act by facilitating the transport of iron. Inhibition was relieved in neither the presence of orotic acid or its methyl ester, indicating that FA do not act at the mitochondrial level of pyrimidine synthesis.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- M Krugliak
- Department of Biological Chemistry, Hebrew University, Jerusalem, Israel
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31
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Muñoz V, Moretti C, Sauvain M, Caron C, Porzel A, Massiot G, Richard B, Le Men-Olivier L. Isolation of bis-indole alkaloids with antileishmanial and antibacterial activities from Peschiera van heurkii (syn. Tabernaemontana van heurkii). Planta Med 1994; 60:455-459. [PMID: 7997477 DOI: 10.1055/s-2006-959531] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Extracts from leaves and stem bark of Peschiera van heurkii (Muell. Arg.) L. Allorge (syn. Tabernaemontana van heurkii Muell. Arg., Apocynaceae) have been assayed for antileishmanial and antibacterial activities. The activities were concentrated in the alkaloid fractions which yielded 20 indole and bisindole alkaloids. The strongest leishmanicidal and antibacterial activities were observed with the dimeric alkaloids conodurine (1), N-demethylconodurine (= gabunine) (2), and conoduramine (3). Weak toxicity towards macrophage host cells and strong activity against the intracellular amastigote form of Leishmania were observed for compounds 1 and 2. In vivo, 1 was less active than glucantime (= N-methylglucamine antimonate), the drug of reference, while 2 was devoid of activity at 100 mg/kg.
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Affiliation(s)
- V Muñoz
- Instituto Boliviano de Biologia de Altura (IBBA), La Paz, Bolivia
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Abstract
Cedronin was isolated from Simaba cedron Planchon (Simaroubaceae), a species popularly believed in South America to have antimalarial properties. It was examined for in vitro and in vivo antimalarial activities and for cytotoxicity against KB cells. Experimental results showed that cedronin was active against chloroquine-sensitive and resistant strain, with an IC50 of 0.25 micrograms/ml (0.65 mumol/ml). It was also found to be active in vivo against Plasmodium vinkei with an IC50 of 1.8 mg/kg (4.7 nM/kg) in the classic 4-day test. Cedronin belongs to the small group of quassinoids with a C19 basic skeleton and shows a rather low cytotoxicity against KB cells (IC50 = 4 micrograms/ml, 10.4 microM) as compared with C20 biologically active quassinoids; however its toxic/therapeutic ratio (10/1.8) remains lower than chloroquine (10/0.5).
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Affiliation(s)
- C Moretti
- Laboratorio de Farmacognosia, ORSTRM-IBBA, La Paz, Bolivia
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Abstract
In the pursuit of new leishmanicidal natural products, 5,7,4'-trihydroxyflavan [1] and the new product, 5,7-dihydroxy-4'-methoxyflavan [2], were isolated from the Guianian medicinal plant Faramea guianensis.
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Affiliation(s)
- M Sauvain
- Institut Français de Recherche Scientifique pour le Développement en Coopération (ORSTOM), La Paz, Bolivia
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34
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Moretti C, Debitus C, Fournet A, Sauvain M, Bourdy G, Laurent D. [Tropical biological diversity and therapeutic innovations. Research conducted by ORSTOM]. Ann Soc Belg Med Trop 1993; 73:169-78. [PMID: 8279864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- C Moretti
- Département Santé, ORSTOM, Paris, France
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35
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Deharo E, Sauvain M, Moretti C, Richard B, Ruiz E, Massiot G. [Antimalarial effect of n-hentriacontanol isolated from Cuatresia sp (Solanaceae)]. Ann Parasitol Hum Comp 1992; 67:126-7. [PMID: 1294019 DOI: 10.1051/parasite/1992674126] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The antimalarial activity of the fatty alcohol, n-hentriacontanol, isolated from the bolivian Solanaceae, Cuatresia sp, is investigated in vivo through a classical four-day suppressive test against Plasmodium berghei and P. vinckei in mice. This product markedly reduced the virulence of experimentally induced P. vinckei infection. n-Hentriacontanol belongs to a new class of antimalarial natural compounds to be exploited for therapeutic purposes.
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