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| Registros recuperados: 14 | |
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| Said, S.A.. |
| Bioscreening guided fractionation of the extracts of soft corals Lobophytum crassum and L. rotundum using brine shrimp larvae cytotoxicity assay led to the isolation of a cembranolide diterpene (E,E,E)-6,10,14-trimethyl-3-methylene- 3a,4,7,8,11,12,15,15aoctahydrocylotetradeca [b]furan-2(3H)-one (1). This diterpene, identified as cembranolide compound 1, was found to be active against the multidrug-resistant and chloroquine-sensitive strains of Plasmodium falciparum malaria parasite in vitro. It also possessed cytotoxic properties. |
| Tipo: Journal Contribution |
Palavras-chave: Lobophytum crassum; L. rotundum; Plasmodium falciparum; Antimalarial; Soft corals; Cytotoxic; Cembranolide Parasites Coral reefs Brine shrimp eggs Parasites http://aims.fao.org/aos/agrovoc/c_5574. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1139 |
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| RÍOS-CHÁVEZ,PATRICIA; PEREZ-GONZALEZ,JORDY; SALGADO-GARCIGLIA,RAFAEL; RAMÍREZ-CHÁVEZ,ENRIQUE; MOLINA-TORRES,JORGE; MARTINEZ-TRUJILLO,MIGUEL; CARREON-ABUD,YAZMIN. |
| Abstract: This study evaluates the antibacterial, cytotoxic activities, and phytochemical composition, of Callistemon citrinus, Hibiscus rosa-sinensis and Plumbago auriculata leaves and flowers, three ornamental plants in Mexico. However, in other countries offers a range of other uses. Ethanol extracts of C. citrinus leaf and flower presented stronger antibacterial activity than the extracts obtained from the other two plants. C. citrinus leaf showed low cytotoxicity (LC50 <600 µg/mL) on the brine shrimp test, whereas the ethanol extracts of H. rosa-sinensis and P. auriculata leaves showed no cytotoxic activity. Flower extracts obtained from the three plants did no exhibit cytotoxicity. GC-MS analysis revealed that the ethanol extract of P. auriculata... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial; Artemia salina; Callistemon citrinus; Cytotoxic; Lupeol. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300611 |
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| ALENCAR,DANIEL B. DE; SILVA,SUZETE R. DA; PIRES-CAVALCANTE,KELMA M.S.; LIMA,REBECA L. DE; PEREIRA JÚNIOR,FRANCISCO N.; SOUSA,MÁRCIA B. DE; VIANA,FRANCISCO A.; NAGANO,CELSO S.; NASCIMENTO,KYRIA S. DO; CAVADA,BENILDO S.; SAMPAIO,ALEXANDRE H.; SAKER-SAMPAIO,SILVANA. |
| Natural antioxidants found in marine macroalgae are bioactive compounds known to play an important role in the prevention of diseases associated with aging cells protecting them against the oxidative damage. The purpose of this study was to evaluate the antioxidant and cytotoxic activity of ethanolic extracts of two species of red seaweeds, Amansia multifida and Meristiella echinocarpa. In vitro antioxidant activity was determined by DPPH radical scavenging assay, ferric-reducing antioxidant power (FRAP) assay, ferrous ion chelating (FIC) assay, β-carotene bleaching (BCB) assay and total phenolic content (TPC) quantification. Cytotoxicity was evaluated with the brine shrimp Artemia sp. lethality test. The TPC values observed in the present study indicated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant; Bioactive compounds; Cytotoxic; Phenolic compounds; Rhodophyta. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100251 |
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| Longeon, Arlette; Copp, Brent R.; Quevrain, Elodie; Roue, Melanie; Kientz, Betty; Cresteil, Thierry; Petek, Sylvain; Debitus, Cecile; Bourguet-kondracki, Marie-lise. |
| Indole derivatives including bromoindoles have been isolated from the South Pacific marine sponges Rhopaloeides odorabile and Hyrtios sp. Their structures were established through analysis of mass spectra and 1D and 2D NMR spectroscopic data. Their potential inhibitory phospholipase A(2) (PLA(2)), antioxidant and cytotoxic activities were evaluated. The new derivative 5,6-dibromo-L-hypaphorine (9) isolated from Hyrtios sp. revealed a weak bee venom PLA2 inhibition (IC50 0.2 mM) and a significant antioxidant activity with an Oxygen Radical Absorbance Capacity (ORAC) value of 0.22. The sesquiterpene aureol (4), also isolated from Hyrtios sp., showed the most potent antioxidant activity with an ORAC value of 0.29. |
| Tipo: Text |
Palavras-chave: Indole derivatives; Bromoindoles; Marine sponge; Rhopaloeides odorabile; Hyrtios sp.; PLA(2) inhibitor; Antioxidant; Cytotoxic. |
| Ano: 2011 |
URL: https://archimer.ifremer.fr/doc/00214/32485/30975.pdf |
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| Shirinzadeh,Hanif; Ghalia,Mohammed; Tascioglu,Alev; Adjali,Ferial Intissar; Gunesacar,Gulsen; Gurer-Orhan,Hande; Suzen,Sibel. |
| Melatonin (MLT) is a strong free radical scavenger that protects the body from the deleterious effects of excess oxidants. Synthesis of MLT analogue compounds with antioxidant potency has recently attracted the interest of researchers. In general, the strategy consists of modifying the groups in the different sites of the indole ring or replacing the indole ring with an analogue. As part of our ongoing research, the antioxidant capacity and cytotoxicity of newly synthesized MLT analogue naphthalene derivatives were evaluated. The radical scavenging activity was tested by a 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. Most of the synthesized compounds showed significant antioxidant activity in comparison to MLT. The structure-activity relationship was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant; Cytotoxic; Melatonin; MTT; DPPH. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100550 |
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| Machado,Michel M.; Oliveira,Luis F.S. de; Zuravski,Luisa; Souza,Raul O. de; Fischer,Paula; Duarte,Jonathaline A.; Rocha,Manoelly O.; Güez,Camila M.; Boligon,Aline A.; Athayde,Margareth L.. |
| ABSTRACT Euphorbia tirucalli (L.), commonly known as aveloz, has been indiscriminately used in popular medicine to treat various illnesses. However, some components can have devastating consequences. Injury to a cell's genetic material can cause mutations, cancer, and cell death. Our main goal in this work was to evaluate the genotoxic and cytotoxic effects of E. tirucalli extract on human leukocytes. For this purpose, we performed a phytochemical analysis to evaluate the plant's components. In the second step, we treated cultured human leukocytes with different concentrations of the dry extract of the plant and then evaluated the oxidative and genotoxic profiles of these leukocytes. We found that at 1% and 10% concentrations, the aveloz extract acted as a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aveloz; Euphorbia tirucalli; Leukocytes; Genotoxic; Cytotoxic. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100017 |
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| LIMA,LUCIANA A.R.S.; ALVES,TÂNIA M.A.; ZANI,CARLOS L.; SALES JÚNIOR,POLICARPO A.; ROMANHA,ALVARO J.; JOHANN,SUSANA; CISALPINO,PATRÍCIA S.; PIMENTA,LÚCIA P.S.; BOAVENTURA,MARIA AMÉLIA D.. |
| Annona cornifolia A. St. -Hil. is a small annual perennial tree found in the Brazilian savannah; their green fruit is popularly used in the treatment of ulcers. The acetogenins isolated from the seeds of Annona cornifolia previously showed to possess antioxidant activity. In continuation of our investigations on the biological activities of acetogenins, four binary mixtures and ten pure adjacent bis-tetrahydrofuran annonaceous acetogenins were evaluated: the cytotoxic (against three human tumor cell lines), antifungal (against Paracoccidioides brasiliensis), trypanocidal (against Trypanosoma cruzi) and leishmanicidal (against Leishmania amazonensis) activities. Acetogenins presented cytotoxic activity confirming their potential use in anti-cancer therapy.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Annona cornifolia; Acetogenins; Cytotoxic; Antifungal; Trypanocidal; Leishmanicidal. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200829 |
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| Hossain,Mohammad Mobarak; Ahamed,Sayed Koushik; Dewan,Syed Masudur Rahman; Hassan,Md Mahadi; Istiaq,Arif; Islam,Mohammad Safiqul; Moghal,Md Mizanur Rahman. |
| BACKGROUND: The study was conducted to evaluate the in vitro antimicrobial activity, cytotoxic, and membrane stabilization activities, and in vivo antiemetic and antipyretic potentials of ethanolic extract, n-hexane and ethyl acetate soluble fractions of Spilanthes paniculata leaves for the first time widely used in the traditional treatments in Bangladesh. RESULTS: In antipyretic activity assay, a significant reduction (P < 0.05) was observed in the temperature in the mice tested. At dose 400 mg/kg-body weight, the n-hexane soluble fraction showed the effect (36.7 ± 0.63°C ) as like as the standard (dose 150 mg/kg-body weight) after 5 h of administration. Extracts showed significant (P < 0.001) potential when tested for the antiemetic activity... |
| Tipo: Journal article |
Palavras-chave: Antiemetic; Anti-inflammatory; Antimicrobial activity; Brine shrimp lethality bioassay; Cytotoxic; Membrane stabilization; Spilanthes paniculata. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100045 |
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| ANDRADE,THALLITA C.B.; LIMA,SIDNEY G. DE; FREITAS,RIVELILSON M.; ROCHA,MÁRCIO S.; ISLAM,TOREQUL; SILVA,TERESINHA G. DA; MILITÃO,GARDENIA C.G.. |
| Croton zehntneri (Euphorbiaceae) is a native aromatic plant from Northeast region of Brazil. The monoterpenoid estragole (ESL) has been isolated by classical chromatographic methods from the essential oil (EO) of C. zehnteneri leaves and characterized by GC-FID and GC-MS, its antimicrobial and cytotoxic potentials being assessed. The analysis of the EO enabled the identification of 100% of the integrated constituents, of which yield was about 1.8%. The main components identified were: eucalyptol, estragole (84.7%) and spathulenol. The dosage of 50 μg/disk of ESL presented fairly significant zones of inhibition against Gram-positive bacteria and fungi. The ESL presented toxicity against Artemia salina with LC50 and LC90 of 4,54 and 8,47 μg mL-1. However, in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Croton zehntneri; Cytotoxic; Estragole. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100173 |
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| Silva,Isabel Cristina Vieira da; Oliveira,Pollyana Felix de; Barbosa,Gleyce Moreno; Wessjohann,Ludger A.; Cardozo-Filho,Lucio; Holandino,Carla; Muzitano,Michelle Frazão; Leal,Ivana Correa Ramos. |
| Cancer is one of the most prevalent diseases worldwide and the natural products could be a source of bioactive compounds. Passiflora mucronata (PM) belongs to a very known vegetal genus, although, there are no studies about cytotoxic activity or isolated compounds. Different extracts from PM were obtained by liquid-liquid partition (P), Soxhlet (Sox) and supercritical fluid (SFE1-5) extraction techniques, being compared concerning their yields, chemical profile and cytotoxicity. The Sox extracts showed the highest yields (6.03%: hexane; 2.51%: dichloromethane) followed by SFE (from 4.34 to 1.63%) and partitions (1.06 and 2.26%). The hexane partition (HP) showed the best cytotoxic activity against K562 cell line (IC50 = 18.72 µg.mL-1). From HP, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apoptosis; Cytotoxic; Passiflora mucronata; Stigmasterol; Triterpenes. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100510 |
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| Ananthi,Rajagopal; Chandra,Nallathambi; Santhiya,Sathiyavedu T.. |
| The aqueous extract of Hemidesmus indicus roots was investigated for its in vivo antigenotoxic effect against cisplatin-induced cytogenetic damage. Swiss albino mice were administered with various doses of the extract either singly (50, 100 and 200 mg/kg body weight) or as split doses (10, 20 and 40 mg/kg bw/day) for five consecutive days by oral gavage. As endpoints, chromosome aberrations, micronuclei in polychromatic erythrocytes, mitotic index and PCE/NCE ratio were estimated. The extract protected the bone marrow cells from cisplatin-induced genotoxicity in an inverse dose-dependent manner. However, the extract was cytotoxic at all doses. But, under split dose regime it conferred a higher level of genoprotection and was not cytotoxic at the lower two... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genoprotective; Cytotoxic; Chromosomal aberrations; Micronucleus; Mitotic index. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000100030 |
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| Registros recuperados: 14 | |
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