Browsing by Autor "Eric Deharo"
Now showing 1 - 20 of 23
- Results Per Page
- Sort Options
Item type: Item , A New Diterpene from Tanaecium jaroba(Thieme Medical Publishers (Germany), 2002) Anne‐Claire Mitaine‐Offer; Michel Sauvain; Eric Deharo; Victoria Muñoz; Monique Zèches-HanrotOne new diterpene, 2 alpha-hydroxy-12beta-hydroxy-isopimara-8(14), 15-diene, and six known compounds as triterpenes, sterols and fatty acid, were isolated from the stem bark of Tanaecium jaroba (Bignoniaceae), a Bolivian plant used in traditional medicine. Their structures were established mainly by 1D and 2D NMR (COSY, HMQC, HMBC, ROESY) and their antiplasmodial activities were evaluated in vitro against Plasmodium falciparum.Item type: Item , A non-radiolabelled ferriprotoporphyrin IX biomineralisation inhibition test for the high throughput screening of antimalarial compounds(Elsevier BV, 2002) Eric Deharo; Rory Nelson García; P Oporto; A. Giménez; Michel Sauvain; Valérie Jullian; H. GinsburgItem type: Item , A search for natural bioactive compounds in Bolivia through a multidisciplinary approach(Elsevier BV, 2004) Geneviève Bourdy; P Oporto; A. Giménez; Eric DeharoItem type: Item , A search for natural bioactive compounds in Bolivia through a multidisciplinary approach(Elsevier BV, 2000) Verónica Francisca Loewe Muñoz; Michel Sauvain; Geneviève Bourdy; S Arrázola; Jorgia Callapa; Grace Ruiz; J Choque; Eric DeharoItem type: Item , A search for natural bioactive compounds in Bolivia through a multidisciplinary approach(Elsevier BV, 2000) R. Baelmans; Eric Deharo; Geneviève Bourdy; Verónica Francisca Loewe Muñoz; C. Quenevo; Michel Sauvain; H. GinsburgItem type: Item , 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(Elsevier BV, 2001) Eric Deharo; Geneviève Bourdy; C. Quenevo; Verónica Francisca Loewe Muñoz; Grace Ruiz; Michel SauvainItem type: Item , Actividad antipalúdica y potenciación de la cloroquina con alcaloides aporfínicos in vitro(2001) Muñoz; Michel Sauvain; André Fournet; Bernard Weniger; A. Valentín; M. Mallié; Jorgia Callapa; Eric Deharo; Pierre‐Marie DuretItem type: Item , Activité antipaludique du n-hentriacontanol isolé de<i>Cuatresia</i>sp (Solanaceae)(EDP Sciences, 1992) Eric Deharo; Michel Sauvain; Costanzo Moretti; Bernard Richard; E. Ruiz; Georges MassiotL’activité antipaludique de l’alcool gras n-hentriacontanol isolé d’une Solanacée bolivienne Cuatresia sp. est appréciée in vivo, par le test classique du traitement de 4 jours, sur Plasmodium berghei et P. vinckei chez la souris. Le produit réduit nettement la virulence de l’infection à P. vinckei. Le n-hentriacontanol appartient à une nouvelle classe de composés naturels antimalariques exploitables en thérapeutique.Item type: Item , Aminothiol Multidentate Chelators against Chagas Disease(Elsevier BV, 2000) Eric Deharo; Mark Loyevsky; Christy S. John; Elfride Balanza; Grace Ruiz; Victoria Muñoz; Victor R. GordeukItem type: Item , Anti-infective assessment of <i>Senecio smithioides</i> (Asteraceae) and isolation of 9-oxoeuryopsin, a furanoeremophilane-type sesquiterpene with antiplasmodial activity(Taylor & Francis, 2015) Patricia Mollinedo; José L. Vila; Hugo Arando; Michel Sauvain; Eric Deharo; José A. BravoThe search for anti-infective activity in the antipyretic plant Senecio smithioides was conducted. Petroleum ether (PE), dichloromethane (CH<sub>2</sub>Cl<sub>2</sub>), ethyl acetate (EtOAc) and hydroethanolic (96% EtOH) extracts, and compounds 9-oxoeuryopsin (1), epoxydecompostin (2) and senecionine (3) were obtained from the aerial parts. All extracts and 1 were tested against chloroquine-resistant strain of Plasmodium falciparum (ref. chloroquine), Trypanosoma cruzi (ref. nifurtimox), Leishmania braziliensis, Leishmania amazonensis and Leishmania donovani (ref. pentamidine), Staphylococcus aureus and Escherichia coli (ref. gentamicin) and, Neurospora crassa and Candida albicans (ref. ketoconazole). The PE extract exhibited the strongest in vitro activity against Plasmodium falciparum IC<sub>50</sub> < 1.0 μg/mL. 1 was established as a potent antiplasmodial compound with an IC<sub>50</sub> = 1.2 μg/mL, 5.2 μM. Other antiparasitic activities were recorded for all extracts and 1. Antibacterial and antifungal activity was negligible.Item type: Item , Anti-Trypanosoma activity of some natural stilbenoids and synthetic related heterocyclic compounds(Elsevier BV, 2001) Esther del Olmo; Marlon Garcı́a Armas; José Luis López‐Pérez; Grace Ruiz; Fernando F. Vargas; Alberto Giménez; Eric Deharo; Arturo San FelicianoItem type: Item , Antimalarial activity of cedronin(Elsevier BV, 1994) Christian Moretti; Eric Deharo; Michel Sauvain; Claude Jardel; Pedroza-Escobar David; M. GasquetItem type: Item , Antimalarial activity of some Colombian medicinal plants(Elsevier BV, 2006) Giovanny Garavito; Julio Rincon; L. Arteaga; Yoshie Hata; Geneviève Bourdy; A. Giménez; R. Pinzón; Eric DeharoItem type: Item , Antiprotozoal activities of Colombian plants(Elsevier BV, 2001) Bernard Weniger; Sara M. Robledo; Gabriel Jaime Murillo Arango; Eric Deharo; Raúl Aragón; Victoria Muñoz; Jorgia Callapa; Annelise Lobstein; Robert AntonItem type: Item , Experimental Conditions for Testing the Inhibitory Activity of Chloroquine on the Formation of β-Hematin(Elsevier BV, 2000) R. Baelmans; Eric Deharo; Verónica Francisca Loewe Muñoz; Michel Sauvain; H. GinsburgItem type: Item , In vitro immunomodulatory activity of plants used by the Tacana ethnic group in Bolivia(Elsevier BV, 2004) Eric Deharo; R. Baelmans; A. Giménez; C. Quenevo; Geneviève BourdyItem type: Item , Leishmanicidal activity of some stilbenoids and related heterocyclic compounds(Elsevier BV, 2001) Esther del Olmo; Marlon Garcı́a Armas; José Luis López‐Pérez; Victoria Muñoz; Eric Deharo; Arturo San FelicianoItem type: Item , Medicinal plants uses of the Tacana, an Amazonian Bolivian ethnic group(Elsevier BV, 2000) Geneviève Bourdy; Saara J. DeWalt; Lia R. ChÁvez de Michel; Andrea Roca; Eric Deharo; Verónica Francisca Loewe Muñoz; L. Balderrama; C. Quenevo; A. GiménezItem type: Item , New Pudicinae (Trichostrongylina, Heligmosomoidea) coparasites of<i>Proechimys longicaudatus</i>(Caviomorpha) from Bolivia.I - Description of<i>Pudica ginsburgi</i>n. sp. and<i>Heligmostrongylus chiarae</i>n. sp.(EDP Sciences, 2001) M.-C. Durette-Desset; Eric Deharo; J.L Santivañez-Galarza; A. G. ChabaudTwo new Pudicinae (Trichostrongylina, Heligmosomoidea, Heligmonellidae) coparasites of Proechimys longicaudatus (Caviomorph rodent) from Bolivia are described: Pudica ginsburgi n. sp. is differentiated from all the other species of the genus by the great length of the spicules and of the vestibule and by a different ratio of the length of the spicules on the length of the body. Heligmostrongylus chiarae n. sp. has very developed rays 4, strongly divergent from rays 5 as occurs in three other species, H. almeidai (Durette-Desset & Tcheprakoff, 1969), a parasite of Trichomys apereoides (= Cercomys cunicularius) from Brazil, H. squamastrongylus (Travassos, 1937), a parasite of Proechimys oris from Brazil and H. proechimysi Durette-Desset, 1970, a parasite of Proechimys semispinosus from Columbia. The specimens from Bolivia are differentiated from the three species by the division of the dorsal ray (anterior half versus posterior half) and by a different ratio of the length of the spicules on the length of the body.Item type: Item , New Types of Potentially Antimalarial Agents: Epidioxy‐substituted norditerpene and norsesterpenes from the marine sponge <i>Diacarnus levii</i>(Wiley, 1998) Michele D’Ambrosio; Antonio Guerriero; Eric Deharo; Cécile Debitus; Victoria Muñoz; Francesco PietraAbstract Natural free carboxylic acids from the hadromerid sponge Diacarnus levii (Kelly‐Borges and Vacelet) were esterified to yield the new cyclic norditerpene peroxides ent ‐muqubilin benzyl ester (= (α R ,3 S ,6 R )‐α,6‐dimethyl‐6‐[( E )‐4‐methyl‐6‐(2,6,6‐trimethyl‐cyclohex‐1‐en‐1‐yl)hex‐3‐enyl]‐1,2‐dioxan‐3‐acetic acid benzyl ester; 6 , diacarnoate B methyl ester(= (α S ,3 R ,6 R )‐α,6‐dimethyl‐6‐{2‐(4a S ,8a S )‐3,4,4a,5,6,7,8,8a‐octahydro‐3‐oxo‐2,5,5,8a‐tetramethylnaphthalen‐1‐yl)ethyl}‐1,2‐dioxan‐3‐acetic acid methyl ester; 9 ), and deoxydiacarnoate B benzyl ester (= (α S ,3 R ,6 R )‐α,6‐dimethyl‐6‐{2‐[(4a S ,8a S )‐3,4,4a,5,6,7,8,8a‐octahydro‐2,5,5,8a‐tetramethyl‐1‐naphthalenyl]ethyl}‐1,2‐dioxan‐3‐acetic acid benzyl ester; 10 ), which were isolated following extensive chromatography. The relative configuration of the peroxide/α‐methylacetate moiety of 6 , 9 , and 10 , was directly determined from their NMR spectra. The absolute configurations of the peroxide/α‐methylacetate moiety was deduced from comparative 1 H‐NMR data of the ( S )‐ and ( R )‐phenylglycine methyl ester derivatives 7 and 8 as well as 11 / 13 and 12 / 14 , all obtained from a mixture of the precursors of 3 , 6 , and 10 . The absolute configuration at the carbobicyclic moiety of enone 9 and of 10 , is identical, as established by chemical interconversion, 9 and 10 belong to the normal labdane series according to empirical CD rules, applied either directly to 9 or to the parent (+)‐sclareolide‐derived enone 20 . In contrast, molar rotation additivity rules suggest the ent ‐labdane configuration for 9 and 10 . The epidioxides 1 – 3 , 6 , and 10 proved active in vitro against the malaria parasite Plasmodium falciparum ; especially the previously isolated methyl 3‐epinuapapuanoate ( 2 ) was active against a chloroquine‐resistant strain, and this with a good security index.