RESUMO
Ochrocephalamines B-D (1-3), composed of fused quinolizidine and octahydroquinoline rings, were isolated from Oxytropis ochrocephala Bunge. Ochrocephalamine B (1) has a unique bridged tetracyclic ring skeleton fused with a lactam ring. The structures of 1-3 were elucidated using spectroscopic and computational approaches. Ochrocephalamine C (2) and D (3) demonstrated potent anti-HBV activities and are more potent against the secretion of HBeAg than that of HBsAg.
Assuntos
Alcaloides/química , Oxytropis/química , Modelos Moleculares , Conformação MolecularRESUMO
Three indole alkaloid glycosides, strobilanthosides A-C (1-3), two known indole alkaloid glucosides (4 and 5), and five phenylethanoid glycosides (8-10) were isolated from the aerial parts of Strobilanthes cusia. The structures of the new compounds were elucidated by spectrometric analysis, and the absolute configurations of 1 and 2 were established by ECD spectrocsopy. N'-ß-d-Glucopyranosylindirubin (5) showed weak antibacterial activity (MIC 62.5-125 µM) against Staphylococcus aureus.
Assuntos
Acanthaceae/química , Antibacterianos/isolamento & purificação , Medicamentos de Ervas Chinesas/isolamento & purificação , Glicosídeos/isolamento & purificação , Alcaloides Indólicos/isolamento & purificação , Antibacterianos/química , Antibacterianos/farmacologia , Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/farmacologia , Glicosídeos/química , Glicosídeos/farmacologia , Alcaloides Indólicos/química , Alcaloides Indólicos/farmacologia , Testes de Sensibilidade Microbiana , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Staphylococcus aureus/efeitos dos fármacosRESUMO
AIM: To study the bufadienolides in the Chinese traditional drug "Ch'an Su" and their cytotoxic activity. METHOD: Various chromatographic techniques were used to isolate the constituents, and their structures were elucidated through physical and spectroscopic data. RESULTS: Twenty compounds were isolated, and eighteen were evaluated in vitro for their cytotoxic activity against A-549 and K-562 cells. CONCLUSION: Compound 1 (bufalin 3ß-acrylic ester) was a new bufadienolide and exhibited the most potent activity against the two tumor cell lines with IC50 values of 7.16 and 6.83 nmol · L(-1). The relationships between structure and activity are discussed.
Assuntos
Venenos de Anfíbios/uso terapêutico , Antineoplásicos/uso terapêutico , Produtos Biológicos/uso terapêutico , Bufanolídeos/uso terapêutico , Neoplasias/tratamento farmacológico , Venenos de Anfíbios/química , Venenos de Anfíbios/farmacologia , Antineoplásicos/química , Antineoplásicos/isolamento & purificação , Antineoplásicos/farmacologia , Produtos Biológicos/química , Produtos Biológicos/farmacologia , Bufanolídeos/química , Bufanolídeos/isolamento & purificação , Bufanolídeos/farmacologia , Humanos , Concentração Inibidora 50 , Células K562 , Medicina Tradicional Chinesa , Estrutura Molecular , Relação Estrutura-AtividadeRESUMO
Two diarylheptanoids, musaitinerins A and B, one heterodimeric phenylphenalenone musaitinerone and four known phenylphenalenones, identified as 4-hydroxy-2-methoxy-9-phenyl-1H-phenalen-1-one, musanolone E, hydroxyanigorufone and irenolone were isolated from the fruits of Musa itinerans Cheesm. Their structures were elucidated using spectroscopic analyses. The antimicrobial activity of these compounds was evaluated against Escherichia coli, Staphylococcus aureus and Candida albicans; the cytotoxic activity of these compounds was also evaluated against human erythromyeloblastoid leukemia (K562) and human alveolar carcinoma epithelial (A549) cell lines, respectively. Musaitinerone and musanolone E exhibited weak effects against the A549 cell line, as compared with adriamycin. However, these two compounds did not exhibit any growth inhibition against K562 cells, S. aureus, E. coli or C. albicans. The other compounds were inactive against all of the tested cell lines and microorganisms, even at concentrations as high as 50 µM.
Assuntos
Diarileptanoides/química , Diarileptanoides/farmacologia , Frutas/química , Musa/química , Fenalenos/química , Fenalenos/farmacologia , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Anti-Infecciosos/química , Anti-Infecciosos/farmacologia , Antineoplásicos Fitogênicos , Candida albicans/efeitos dos fármacos , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Escherichia coli/efeitos dos fármacos , Humanos , Staphylococcus aureus/efeitos dos fármacosRESUMO
OBJECTIVE: To understand the dynamic status of schistosomiasis epidemic situation and Oncomelania hupensis snail status before and after the schistosomiasis transmission interrupted in the mountainous areas of Yunnan Province. METHODS: The data of schistosomiasis epidemic situation and snail status were collected and analyzed statistically in Jianchuan County from 10 years before the schistosomiasis transmission interrupted to 2008. RESULTS: The schistosomiasis control began in Jianchuan County from 1954. In 1976, the criteria of schistosomiasis endemic controlled were reached, and the infection rate of population was 0.65% and the infection rate of snails was 0.40%. In 1981, the criteria of schistosomiasis transmission controlled were reached, and the infection rate of population was 0.34% and the infection rate of snails was 1.41%. In 1993, the criteria of schistosomiasis transmission interrupted were reached, and the infection rate of population was 0 and the infection rate of snails was 0. There was a fluctuation in the schistosomiasis epidemic situation and snail status during the whole control duration, but the trend was decreasing. CONCLUSION: The time from schistosomiasis endemic controlled to transmission controlled is relatively short, but the time from transmission controlled to transmission interrupted is relatively long. In the original schistosomiasis endemic areas, there might be some areas where there is no the disease bud there still are snails.
Assuntos
Doenças dos Bovinos/epidemiologia , Esquistossomose/epidemiologia , Esquistossomose/veterinária , Adolescente , Adulto , Idoso , Animais , Bovinos , Doenças dos Bovinos/parasitologia , Doenças dos Bovinos/prevenção & controle , China/epidemiologia , Reservatórios de Doenças/parasitologia , Doenças Endêmicas/prevenção & controle , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Schistosoma/fisiologia , Esquistossomose/parasitologia , Esquistossomose/prevenção & controle , Caramujos/crescimento & desenvolvimento , Caramujos/parasitologia , Adulto JovemRESUMO
Two new mono- and four new dimeric alkenylphenols, namely sarmentosumols A to F (1-6), were isolated from the aerial parts of Piper sarmentosum. The structures of these compounds were determined through a detailed analysis of NMR and MS data. Their antimicrobial activity against Escherichia coli, Staphyloccocus aureus, and Candida albicans, and their cytotoxic activity against human myeloid leukemia (K562) and human lung adenocarcinoma (A549) cell lines were also evaluated. Except for sarmentosumol A (1), whose MIC on S. aureus was reported to be 7.0 µg/mL, none of the other newly discovered compounds exhibited antimicrobial property. The studied compounds did not possess any cytotoxic property.
Assuntos
Anti-Infecciosos/isolamento & purificação , Fenóis/isolamento & purificação , Piper/química , Anti-Infecciosos/química , Anti-Infecciosos/farmacologia , Linhagem Celular Tumoral , Dimerização , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Espectroscopia de Ressonância Magnética , Testes de Sensibilidade Microbiana , Fenóis/química , Fenóis/farmacologia , Espectrometria de Massas por Ionização por ElectrosprayRESUMO
A new complex natural product with a C39 skeleton, named nudibaccatumone, and the known sesquiterpenes (+)-spathulenol, (-)-4ß,10α-aromadendranediol, and ent-T-muurolol, as well as the phenylpropanoid hydroxychavicol, were isolated from the aerial parts of Piper nudibaccatum. The structure and absolute configuration of nudibaccatumone were elucidated using spectroscopic methods and ECD calculations. A 1,8-Michael addition reaction and an intermolecular, inverse electron demand Diels-Alder reaction are proposed as the key steps in the biosynthesis of nudibaccatumone.
Assuntos
Medicamentos de Ervas Chinesas/isolamento & purificação , Fenilpropionatos/isolamento & purificação , Piper/química , Sesquiterpenos/isolamento & purificação , Candida albicans/efeitos dos fármacos , Ensaios de Seleção de Medicamentos Antitumorais , Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/farmacologia , Escherichia coli/efeitos dos fármacos , Humanos , Testes de Sensibilidade Microbiana , Estrutura Molecular , Fenilpropionatos/química , Fenilpropionatos/farmacologia , Sesquiterpenos/química , Sesquiterpenos/farmacologia , Sesquiterpenos de Guaiano , Staphylococcus aureus/efeitos dos fármacos , TerpenosRESUMO
OBJECTIVE: To investigate the chemical constituents of Euphorbia helioscopia and their antitumor activities. METHODS: Normal phase silica gel, RP-18 silica gel and Sephadex LH-20 column chromatographies combined with recrystallization were used to isolate and purify the constituents. Their structures were identifided by spectroscopic methods, including 1H-NMR, 13C-NMR, ESI-MS and EI-MS. And the antitumor activities of some of chemical constituents in vitro were detected by sulphorhodamine B protein staining. RESULTS: Nine compounds were isolated and their structures were identified as euphohelioscopin A (1), euphoscopin (2), 9, 19-cyclolanost-23E-ene-3, 25-diol (3), euphoscopin C (4), euphornin A (5), euphoheliosnoid A (6), ent-kaurane-3-oxo-16beta, 17-diol (7), 9, 19-cyclolanost-25-ene-3beta, 22-diol (8) and helioscopinolide A(9) Compound 9 showed effect on inhibiting the cell proliferations of MCF-7 cell line. CONCLUSION: Compounds 3, 7, 8 and 9 are obtained from this plant for the first time, and compound 9 shows the potential antitumor activity.
Assuntos
Abietanos/isolamento & purificação , Abietanos/farmacologia , Medicamentos de Ervas Chinesas/isolamento & purificação , Medicamentos de Ervas Chinesas/farmacologia , Euphorbia/química , Abietanos/química , Antineoplásicos Fitogênicos/isolamento & purificação , Antineoplásicos Fitogênicos/farmacologia , Neoplasias da Mama/patologia , Proliferação de Células/efeitos dos fármacos , Medicamentos de Ervas Chinesas/química , Feminino , Humanos , Células MCF-7 , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Plantas Medicinais/químicaRESUMO
Twelve isoquinoline alkaloids including two new nitro-containing tetrahydroprotoberberines, (-)-2,9-dihydroxyl-3,11-dimethoxy-1,10-dinitrotetrahydroprotoberberine (1) and (+)-4-nitroisoapocavidine (2), were isolated from the whole plant of Corydalis saxicola Bunting. The structures of the new compounds were established by spectroscopic analysis and chemical evidence. The inhibitory activity of these isolates against cholinesterase and canine parvovirus were evaluated. Compounds 1 and 1A, (+)-1-nitroapocavidine (5), berberine (8), palmatine (9), dehydrocavidine (10), and sanguinarine (11) showed potent inhibitory activity against acetylcholinesterase with IC(50) values of less than 10 µM, while only compound 1 possessed weak activity against canine parvovirus. Structure-activity studies demonstrated that the nitro substituents at ring A in the tetrahydroprotoberberines led to an increase in the anti-acetylcholinesterase activity.
Assuntos
Alcaloides de Berberina/farmacologia , Inibidores da Colinesterase/farmacologia , Corydalis/química , Parvovirus/efeitos dos fármacos , Extratos Vegetais/farmacologia , Acetilcolinesterase/metabolismo , Animais , Antivirais/química , Antivirais/isolamento & purificação , Antivirais/farmacologia , Alcaloides de Berberina/química , Alcaloides de Berberina/isolamento & purificação , Inibidores da Colinesterase/química , Inibidores da Colinesterase/isolamento & purificação , Cães , Estrutura Molecular , Extratos Vegetais/química , Relação Estrutura-AtividadeRESUMO
In a bioassay-guided search for acetylcholinesterase (AChE) inhibitors from Chinese natural resources, eight isoquinoline alkaloids, tetrahydropalmatine (1), corydaline (2), protopine (3), berberine (4), palmatine (5), jatrorrhizine (6), coptisine (7) and dehydrocorydaline (8), were isolated from the methanolic extract of the tubers of Corydalis yanhusuo. Structures of these compounds were identified by spectroscopic techniques. Compounds 4-8 inhibited AChE activity in a dose-dependent manner, and the IC50 values were 0.47 ± 0.01, 0.74 ± 0.06, 2.08 ± 0.09, 1.01 ± 0.03 and 0.62 ± 0.05 µM, respectively. Structure-activity relationship analysis suggested that aromatisation at ring C, as well as substitutions at C-2, C-3, C-9, C-10 and C-13 affect the AChE activity of protoberberine alkaloids.
Assuntos
Acetilcolinesterase/efeitos dos fármacos , Inibidores da Colinesterase/farmacologia , Corydalis/química , Bioensaio , Inibidores da Colinesterase/química , Inibidores da Colinesterase/isolamento & purificação , Cromatografia em Camada Fina , Relação Dose-Resposta a Droga , Concentração Inibidora 50 , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Espectrometria de Massas por Ionização por ElectrosprayRESUMO
Phytochemical study of the roots of Trigonostemon thyrsoideum led to the isolation of four new oxygenated daphnane-type diterpenoids, trigonosins A-D (1-4), and two new modified daphnanes, trigonosins E and F (5 and 6). The structures and relative configurations were elucidated on the basis of extensive spectroscopic analysis, including 1D and 2D NMR experiments. All compounds isolated were evaluated for their cytotoxicity against HL-60, A549, and MCF-7 human cancer cell lines.
Assuntos
Antineoplásicos Fitogênicos/isolamento & purificação , Antineoplásicos Fitogênicos/farmacologia , Diterpenos/isolamento & purificação , Diterpenos/farmacologia , Medicamentos de Ervas Chinesas/isolamento & purificação , Medicamentos de Ervas Chinesas/farmacologia , Euphorbiaceae/química , Antineoplásicos Fitogênicos/química , Diterpenos/química , Ensaios de Seleção de Medicamentos Antitumorais , Medicamentos de Ervas Chinesas/química , Células HL-60 , Humanos , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Raízes de Plantas/químicaRESUMO
Palhinine A, a novel C(16)N-type Lycopodium alkaloid with a unique 5/6/6/9 tetracyclic ring system, was isolated from the whole plant of Palhinhaea cernua L. (Lycopodiaceae). Its structure was elucidated by spectroscopic methods, and the absolute configuration was determined by single-crystal X-ray diffraction analysis using the Flack parameter. Palhinine A is reported as the first example of Lycopodium alkaloids of which C-16 is fused to a new ring through a C-16-C-4 lingkage.
Assuntos
Alcaloides/química , Alcaloides/isolamento & purificação , Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/isolamento & purificação , Lycopodium/química , Acetilcolinesterase/efeitos dos fármacos , Alcaloides/farmacologia , Antineoplásicos Fitogênicos/farmacologia , Cristalografia por Raios X , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Células K562 , Conformação Molecular , Estrutura Molecular , Ressonância Magnética Nuclear BiomolecularRESUMO
Eight new pyrrolidinoindoline alkaloids (1-8) were isolated from the whole plant of Selaginella moellendorfii. Their structures were determined by mass spectrometry, 1D and 2D NMR spectroscopy, and chemical interconversions. These alkaloids have a 3-carboxybut-2-enyl group at C-3a and two methyl groups at N-8. The possible biogenetic route from selaginellic acid (1) to neoselaginellic acid (6) was postulated and chemically mimicked. Tautomerization between 6 and 6a was observed. Selected compounds were evaluated for antibacterial, cytotoxic, and acetylcholinesterase inhibitory activities.
Assuntos
Medicamentos de Ervas Chinesas/isolamento & purificação , Alcaloides Indólicos/isolamento & purificação , Pirrolidinas/isolamento & purificação , Selaginellaceae/química , Inibidores da Colinesterase/química , Inibidores da Colinesterase/isolamento & purificação , Inibidores da Colinesterase/farmacologia , Ensaios de Seleção de Medicamentos Antitumorais , Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/farmacologia , Escherichia coli/efeitos dos fármacos , Humanos , Alcaloides Indólicos/química , Alcaloides Indólicos/farmacologia , Testes de Sensibilidade Microbiana , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Pirrolidinas/química , Pirrolidinas/farmacologia , Staphylococcus aureus/efeitos dos fármacosRESUMO
Hostasinine A (1), a benzylphenethylamine alkaloid with an unprecedented skeleton featuring a C-4-C-6 linkage and a nitrone moiety, was isolated from Hosta plantaginea. Its structure was established on the basis of spectroscopic data, and was further confirmed by single-crystal X-ray diffraction. The alkaloid was postulated biogenetically from haemanthidine via N-oxidation and aza-aldol-type condensation and was synthesized biomimetically. The inhibitory activities of 1 on acetylcholinesterase (AChE) and two tumor cell lines (K562 and A549) were also evaluated.
Assuntos
Alcaloides/química , Benzeno/química , Materiais Biomiméticos/síntese química , Hosta/química , Fenetilaminas/química , Ácidos/química , Materiais Biomiméticos/química , Estrutura Molecular , Fenetilaminas/síntese químicaRESUMO
Five new benzylphenethylamine alkaloids, hostasine (1), 8-demethoxyhostasine, 8-demethoxy-10-O-methylhostasine, 10-O-methylhostasine, and 9-O-demethyl-7-O-methyllycorenine, along with 12 known compounds, were isolated from Hosta plantaginea by bioassay-guided fractionation. The structures of the new alkaloids were established by means of extensive spectroscopic methods, and the relative configuration of 1 was further confirmed by single-crystal X-ray diffraction. 7-Deoxy-trans-dihydronarciclasine (IC(50) = 1.80 microM), a known alkaloid, showed strong activity against tobacco mosaic virus by the half-leaf method. Some of these alkaloids were also evaluated for their inhibitory activity against acetylcholinesterase. 8-Demethoxy-10-O-methylhostasine was found to possess significant activity, with an IC(50) of 2.32 microM.
Assuntos
Acetilcolinesterase/efeitos dos fármacos , Antivirais/isolamento & purificação , Antivirais/farmacologia , Inibidores da Colinesterase/isolamento & purificação , Inibidores da Colinesterase/farmacologia , Hosta/química , Plantas Medicinais/química , Vírus do Mosaico do Tabaco/efeitos dos fármacos , Antivirais/química , Inibidores da Colinesterase/química , Cristalografia por Raios X , Conformação Molecular , Estrutura MolecularRESUMO
Four new trijugin-type limonoids, cipatrijugins A-D (1-4), together with the known cipadesin A (5), were isolated from the leaves of Cipadessa cinerascens, and their structures were elucidated on the basis of spectroscopic and computational methods. The ability of compounds 1-5 to inhibit the growth of the A549 and K562 tumor cell lines was evaluated.
Assuntos
Antineoplásicos Fitogênicos/isolamento & purificação , Medicamentos de Ervas Chinesas/isolamento & purificação , Limoninas/isolamento & purificação , Meliaceae/química , Plantas Medicinais/química , Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/farmacologia , Ensaios de Seleção de Medicamentos Antitumorais , Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/farmacologia , Humanos , Limoninas/química , Limoninas/farmacologia , Estrutura Molecular , Folhas de Planta/químicaRESUMO
Group IIA phospholipase A(2) (PLA(2)) are major components in Viperidae/Crotalidae venom. In the present study, a novel PLA(2) named promutoxin with Arg at the site 49 has been purified from the venom of Protobothrops mucrosquamatus by chromatography. It consists of 122 amino acid residues with a molecular mass of 13,656 Da assessed by MALDI-TOF. It has the structural features of snake venom group IIA PLA(2)s, but has no PLA(2) enzymatic activity. Promutoxin shows higher amino acid sequence identity to the K49 PLA(2)s (72-95%) than to D49 PLA(2)s (52-58%). Promutoxin exhibits potent myotoxicity in the animal model with as little as 1 microg of promutoxin causing myonecrosis and myoedema in the gastrocnemius muscle of mice. Promutoxin is also able to stimulate the release of IL-12, TNFalpha, IL-6 and IL-1beta from human monocytes, and induce IL-2, TNFalpha and IL-6 release from T cells, indicating that this snake venom group IIA PLA(2) is actively involved in the inflammatory process in man caused by snake venom poisoning.
Assuntos
Venenos de Crotalídeos/enzimologia , Citocinas/metabolismo , Fosfolipases A/química , Fosfolipases A/farmacologia , Sequência de Aminoácidos , Animais , Antibacterianos/farmacologia , Arginina , Sequência de Bases , Humanos , Dados de Sequência Molecular , Peso Molecular , Monócitos/efeitos dos fármacos , Monócitos/imunologia , Fosfolipases A/isolamento & purificação , Ratos , Ratos Wistar , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz , Linfócitos T/efeitos dos fármacos , Linfócitos T/imunologiaRESUMO
The purpose of this pilot project was to establish a discharge-planning model and evaluate its effectiveness. Orthopedic patients who scored 7 or above on a high-risk screening form were recruited for the project. Case managers served as discharge planners, and handled the following procedures: screening of patients, drawing up of the discharge plan, providing pre-discharge instructions, coordinating resources and services, and telephone follow-up. Results showed that discharge planning improved both the completion rate of pre-discharge instructions and patient satisfaction with discharge planning. It is suggested that, in future research, experimental studies could be used to examine the effectiveness of discharge planning. The study showed the importance of dedicated case managers for improving the effectiveness of discharge planning.