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1.
Article in English | WPRIM | ID: wpr-888776

ABSTRACT

Honokiol is the dominant biphenolic compound isolated from the Magnolia tree, and has long been considered as the active constituent of the traditional Chinese herb, 'Houpo', which is widely used to treat symptoms due to 'stagnation of qi'. Pharmacological studies have shown that honokiol possesses a wide range of bioactivities without obvious toxicity. Honokiol protects the liver, kidneys, nervous system, and cardiovascular system through reducing oxidative stress and relieving inflammation. Moreover, honokiol shows anti-diabetic property through enhancing insulin sensitivity, and anti-obese property through promoting browning of adipocytes. In vivo and in vitro studies indicated that honokiol functions as an anti-cancer agent through multiple mechanisms: inhibiting angiogenesis, promoting cell apoptosis, and regulating cell cycle. A variety of therapeutic effects of honokiol may be associated with its physiochemical properties, which make honokiol readily cross the blood brain barrier and the blood-cerebrospinal fluid barrier, with high bioavailability. In the future, more clinical researches on honokiol are needed to fully authenticate its therapeutic values.


Subject(s)
Apoptosis , Biphenyl Compounds/pharmacology , Drugs, Chinese Herbal/pharmacology , Humans , Lignans/pharmacology , Magnolia
2.
Article in Chinese | WPRIM | ID: wpr-828094

ABSTRACT

OBJECTIVE@#To study the effects of honokiol on proliferation, migration and apoptosis of human tongue carcinoma CAL-27 cells.@*METHODS@#Routinely cultured CAL-27 cells were treated with 20, 40, or 60 μmol/L honokiol and the changes in cell proliferation were assessed with MTT assay. The scratch wound healing assay was used to assess the migration ability of the treated cells, and the cell apoptosis was detected with Hoechst33342 fluorescence staining and annexin V-FITC/PI method. The protein expression levels of p-Pi3k, p-Fak, Fak, MMP-2, MMP-9, p-Akt, Akt, Bax, Bcl-2 and cleaved-caspase-3 in the treated cells were detected using Western blotting.@*RESULTS@#Treatment with honokiol at 20, 40, and 60 μmol/L for 24 h significantly lowered the proliferation and migration ability of CAL-27 cells. The number of apoptotic cells increased with the increase of honokiol concentration, which resulted in a cell apoptosis rate of (15.24±2.06)% at 20 μmol/L, (35.03±2.42)% at 40 μmol/L, and (48.13±4.61)% at 60 μmol/L, as compared with (6.53±1.80)% in the control group. The expressions of p-Pi3k, p-Fak, MMP-2, MMP-9, p-Akt and BCL-2 decreased and those of Bax and cleaved-caspase-3 increased significantly in the cells after the treatment ( < 0.01).@*CONCLUSIONS@#Honokiol can inhibit the proliferation and migration and induce apoptosis of CAL-27 cells possibly by regulating the expressions of p-Pi3k, p-Fak, MMP-2, MMP-9, p-Akt, Bax, Bcl-2 and cleaved-caspase-3.


Subject(s)
Apoptosis , Biphenyl Compounds , Cell Line, Tumor , Cell Proliferation , Humans , Lignans , Tongue Neoplasms
3.
Bol. latinoam. Caribe plantas med. aromát ; 18(6): 544-554, nov. 2019. tab, ilus
Article in English | LILACS | ID: biblio-1102238

ABSTRACT

In this work, the inhibitory activity of a wide range of polysaccharide extracts from two Iranian and French strains of Agaricus subrufescens were evaluated toward acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). Among them, two extracts S9 and S'7 obtained from Iranian and French strains under different extraction conditions showed selective AChE inhibitory activity with IC50 values of 154.63 and 145.43 µg/mL, respectively. It should be noted that all extracts from both strains demonstrated no BChE inhibitory activity. S9 and S'7 were also tested for their effect on amyloid beta (Aß) aggregation, antioxidant activity, and neuroprotectivity. Their activity against Aß aggregation was comparable to that of donepezil as the reference drug but they induced moderate antioxidant activity by DPPH radical scavenging activity and negligible neuroprotectivity against Aß-induced damage.


En este trabajo, se evaluó la actividad inhibitoria de acetilcolinesterasa (AChE) y butirilcolinesterasa (BChE) para varios extractos de polisacáridos de dos cepas iraníes y francesas de Agaricus subrufescens. Los extractos más potentes mostraron valores de IC50 de 154,63 y 145 µg/ml para las cepas iraní (S9) y francesa (S'7), respectivamente, las cuales se obtuvieron de diferentes condiciones de extracción; sin embargo, todos los extractos no mostraron actividad inhibitoria de BChE. Además, S9 y S'7 se probaron para determinar su efecto sobre la agregación de beta-amiloide (Aß), así como su actividad antioxidante y neuroprotectora. Su actividad inhibitoria de la agregación de Aß fue comparable con donepezil, fármaco de referencia, pero indujeron una actividad antioxidante moderada, medida mediante la captación de radicales DPPH, y una neuroprotectora insignificante contra el daño inducido por Aß.


Subject(s)
Agaricus/chemistry , Alzheimer Disease/drug therapy , Amyloid/drug effects , Antioxidants/pharmacology , Picrates , Biphenyl Compounds , Butyrylcholinesterase , Cholinesterase Inhibitors/pharmacology , Neuroprotective Agents , Alzheimer Disease/enzymology , Fungal Polysaccharides/pharmacology
4.
Bol. latinoam. Caribe plantas med. aromát ; 18(6): 577-585, nov. 2019. ilus, tab
Article in English | LILACS | ID: biblio-1102645

ABSTRACT

Pineapple peels has several beneficial properties including antioxidant activity. We investigated the antioxidant effect of five different peels of pineapple lyophilized extracts, not adsorbed and adsorbed onto Amberlite. They were examined using total phenolic contents (TPC), antioxidant effect by 1,1-diphenyl-2-picryl hydrazyl (DPPH) radical scavenging and ferric reducing antioxidant power (FRAP). In addition, we analyzed the chemical composition by HPLC-ESI-QTOF-MS/MS. The main constituents of pineapple peels were tentatively identified as quercetin glycosides and N,N'-diferuloylspermidine. We conclude that the antioxidant activity in pineapple peels from District of Poroto, Province of Trujillo, Region of La Libertad, can be associated with the presence of flavonoid and spermidines.


Las cáscaras de piña tienen varias propiedades beneficiosas, incluida la actividad antioxidante. Investigamos el efecto antioxidante de cinco exfoliaciones diferentes de extracto liofilizado de piña, no adsorbidas y adsorbidas en Amberlita. Se examinaron utilizando los contenidos fenólicos totales (TPC), el efecto antioxidante mediante la eliminación del radical 1,1-difenil-2-picril-hidrazilo (DPPH) y el poder férrico antioxidante reductor (FRAP). Además, analizamos la composición química por HPLC-ESI-QTOF-MS/MS. Los principales constituyentes de las cáscaras de piña se identificaron tentativamente como glucósidos de quercetina y N,N'- diferuloylspermidina. Concluimos que la actividad antioxidante en las cáscaras de piña del Distrito de Poroto, Provincia de Trujillo, Región de La Libertad, puede estar asociada con la presencia de flavonoides y espermidinas.


Subject(s)
Ananas/chemistry , Antioxidants/pharmacology , Peru , Phenols/analysis , Picrates , Biphenyl Compounds , Ferric Compounds , Chromatography, High Pressure Liquid , Tandem Mass Spectrometry , Antioxidants/chemistry
6.
Article in English | WPRIM | ID: wpr-776899

ABSTRACT

In the present study, two new acetylene conjugate compounds, dibutyl (2Z, 6Z)-octa-2, 6-dien-4-yne dioate (1), and dibutyl (2E, 6E)- octa-2, 6-dien-4-yne dioate (2), were isolated from the dry stem leaves of Viscum album, along with nine known compounds (3 - 11). Their structures were confirmed on the basis of spectroscopic data. Compounds 1 and 8 showed antioxidant activity against xanthine oxidase (XOD) and 1,1-diphenyl-2-picrylhydrazyl radical 2,2-diphenyl-1-(2,4,6-trinitrophenyl) hydroxyl (DPPH), with the IC of 1.22 and 1.33 μmol·L, and the SC of 4.34 and 8.22 μmol·L, respectively.


Subject(s)
Acetylene , Chemistry , Antioxidants , Chemistry , Pharmacology , Biphenyl Compounds , Chemistry , Molecular Structure , Picrates , Chemistry , Plant Extracts , Chemistry , Pharmacology , Plant Leaves , Chemistry , Viscum album , Chemistry , Xanthine Oxidase , Chemistry
7.
Article in Chinese | WPRIM | ID: wpr-773676

ABSTRACT

Magnoliae Officinalis Cortex( MOC),the stem bark of Magnolia officinalis( MO) and M. officinalis var. biloba( MOB),is a main ingredient in more than 200 types of Chinese formulae commonly used in clinics. MO and MOB are widely distributed in China,from Sichuan of the west to Zhejiang province of the east and from Shannxi province in the north to Guangxi province in the south. This review summarizes new findings on geo-heralism of MOC concerning textual research,plants taxonomy,genetic study,chemical study,and pharmacological activity,resulting in the following views. ①The original plants of MOC are suggested to be divided into three geographic clans according to the form of leave and the result of genetic research; ②Concentrations of magnolol,honokiol,magnoloside A,magnoloside B,magnoflorine,and β-eudesmol in samples collected from different geographic areas are varied;③Samples of MOC produced in Hubei and Sichuan were traditionally regarded as Dao-di herbs,which were called Chuanpo,and the pure haplotype of MOC produced in Hubei may become a genetic index.


Subject(s)
Biphenyl Compounds , China , Drugs, Chinese Herbal , Lignans , Magnolia , Chemistry , Phytochemicals
8.
Arch. cardiol. Méx ; 88(4): 287-297, oct.-dic. 2018. tab, graf
Article in Spanish | LILACS | ID: biblio-1124150

ABSTRACT

Resumen Introducción: Se revisará la evolución del tratamiento farmacológico de la insuficiencia cardiaca (IC) en los últimos 25 an˜os, desde el concepto de tratamiento con vasodilatadores, pasando por el bloqueo o inhibición del sistema renina-angiotensina-aldosterona y la inhibición betaadrenérgica y su importante contribución en la disminución de la morbimortalidad por IC, el papel de los péptidos natriuréticos y, finalmente, se conocerá uno de los estudios más importantes en el área cardiológica y específicamente en el manejo de la IC, en el cual se demuestra un enfoque modulador de los sistemas neuro humorales que se activan en estos pacientes. Objetivos: La IC constituye la etapa final de la mayoría de las enfermedades cardiovasculares, con una alta tasa de hospitalización y de morbimortalidad cardiovascular, siendo, por lo tanto, de interés constante la necesidad de encontrar un agente terapéutico innovador que disminuya significativamente estas complicaciones y también que mejore la calidad de vida de los que la presentan. Metodología: Se realizará una descripción del PARADIGM-HF Clinical Trial, que utilizó un compuesto sacubitrilo/valsartán para el manejo de la IC con un mecanismo modulador diferente del concepto de bloqueador de sistemas deletéreos que se activan cuando un paciente presenta síntomas y signos de IC. Conclusiones: La muerte por causas cardiovasculares u hospitalización por IC (el punto final primario) se produjo en 914 pacientes (21.8%) en el grupo sacubitrilo/valsartán y 1,117 pacientes (26.5%) en el grupo de enalapril (razón de riesgo en el grupo sacubitrilo/valsartán, 0.80; intervalo de confianza (IC) del 95%: 0.73 a 0.87; p < 0.001 (exacta p = 4.0 × 10 - 7)). De los pacientes que recibieron sacubitrilo/valsartán, 537 (12.8%) fueron hospitalizados por IC, en comparación con los 658 pacientes (15.6%) que recibieron enalapril (razón de riesgo, 0.79; IC del 95%, 0.71 a 0.89; p < 0.001). Un total de 711 pacientes (17.0%) en el grupo sacubitrilo/valsartán y 835 pacientes (19.8%) en el grupo de enalapril murió (razón de riesgo de muerte por cualquier causa, 0.84; IC del 95%, 0.76 a la 0.93; p < 0.001).


Abstract Introduction: A review is presented on the evolution of the pharmacological treatment of heart failure (HF) in the last 25 years, from the concept of treatment with vasodilators to the blocking or inhibition of the renin angiotensin aldosterone system. Beta-adrenergic inhibition and its important contribution in the reduction of morbidity and mortality due to HF will be discussed along with the role of the natriuretic peptides. One of the most important studies in the cardiology area, and specifically in the management of HF, is presented, in which an approach is demonstrated of the modulator of the neurohumoral systems that are activated in these patients. Objectives: HF is the final stage of most cardiovascular diseases, and has a high rate of hospital admission, as well as cardiovascular morbidity and mortality. Therefore, there is constant interest in the need to find an innovative therapeutic agent that significantly reduces these complications and that improves the quality of life of those who suffer from it. Methods: A description will be presented of the PARADIGM-HF Clinical Trial using a sacubitril/valsartán compound for the management of HF with a modulating mechanism different from the concept of a deleterious system blocker that is activated when a patient has symptoms and signs of heart failure. Conclusions: Death due to cardiovascular causes, or hospital admission due to heart failure (the primary endpoint) occurred in 914 patients (21.8%) in the Sacubitril / valsartán group, and 1117 patients (26.5%) in the enalapril group (risk ratio in the sacubitril / valsartán group, 0.80, with a 95% confidence interval [CI]: 0.73 to 0.87, P<0.001 ;exact P= 4.0 × 10 --7;). Of the patients receiving sacubitril / valsartán, 537 (12.8%) were hospitalised due to heart failure, compared with 658 patients (15.6%) receiving enalapril (hazard ratio 0.79, 95% CI: 0.71 to 0.89, P<.001). A total of 711 patients (17.0%) in the sacubitril / valsartán group, and 835 patients (19.8%) in the enalapril group, died (all-cause death rate, 0.84, 95% CI: 0.76 to 0.93, P<.001)


Subject(s)
Humans , Tetrazoles/therapeutic use , Enalapril/therapeutic use , Aminobutyrates/therapeutic use , Heart Failure/drug therapy , Quality of Life , Systole , Tetrazoles/pharmacology , Biphenyl Compounds , Angiotensin-Converting Enzyme Inhibitors/pharmacology , Enalapril/pharmacology , Drug Combinations , Angiotensin Receptor Antagonists/therapeutic use , Angiotensin Receptor Antagonists/pharmacology , Valsartan , Aminobutyrates/pharmacology , Heart Failure/physiopathology , Hospitalization/statistics & numerical data
9.
Bol. latinoam. Caribe plantas med. aromát ; 17(6): 566-574, nov. 2018. tab, ilus
Article in English | LILACS | ID: biblio-1007336

ABSTRACT

The composition of the essential oil obtained by hydrodistillation from Minthostachys mollis Griseb (Lamiaceae) aerial parts was determined by GC and GC/MS. Menthone (13.2%), pulegone (12.4%), cis-dihydrocarvone (9.8%) and carvacrol acetate (8.8%) were the main essential oil components. The cytotoxic activity of the essential oil was in vitro measured using the MTT colorimetric assay. IC50 values were calculated on healthy non-tumor cells (HEK-293) and three human cancer cell lines (T24, DU-145 and MCF-7). In such latter cells, the estimated values were around 0.2 mg/mL. In addition, the antioxidant activity was determined by interaction with the stable free radical 2,2"-diphenyl-1-picrylhydrazyl. The essential oil was almost devoid of antioxidant activity indicating that its anti-proliferative action relies on other unknown mechanism.


La composición del aceite esencial obtenido por hidrodestilación a partir de partes aéreas de Minthostachys mollis Griseb (Lamiaceae) se determinó mediante GC y GC/MS. Mentona (13.2%), pulegona (12.4%), junto con cis-dihidrocarvona (9.8%) y acetato de carvacrol (8.8%) fueron los principales componentes del aceite esencial. La actividad citotóxica del aceite esencial se midió in vitro utilizando el ensayo colorimétrico MTT tanto en células sanas no tumorales (HEK-293) como en tres líneas celulares de cáncer humano (T24, DU-145 y MCF-7). Los valores de IC50 calculados fueron de alrededor de 0.2 mg/mL. Además, se determinó la actividad antioxidante por su interacción con el radical libre 2,2"-difenil-1-picrilhidrazilo. El aceite esencial tiene baja actividad antioxidante, lo que indica que su acción antiproliferativa depende de otro mecanismo desconocido.


Subject(s)
Oils, Volatile/pharmacology , Lamiaceae , Cell Line, Tumor/drug effects , Antioxidants/pharmacology , Peru , Picrates , Terpenes/analysis , Biological Assay , Biphenyl Compounds , Calorimetry , Oils, Volatile/chemistry , Cell Survival/drug effects , Free Radical Scavengers , Gas Chromatography-Mass Spectrometry , Antioxidants/chemistry
10.
Braz. j. biol ; 78(2): 248-254, May-Aug. 2018. tab, graf
Article in English | LILACS | ID: biblio-888871

ABSTRACT

Abstract This study was carried out to assess the antibacterial, cytotoxic and antioxidant activities of extracts of Morus nigra L. HPLC was used to determine the fingerprint chromatogram of the crude ethanolic extract (Mn-EtOH). The antibacterial effect was assessed through the method of microdilution. The cytotoxicity was tested against human tumour cell lines using the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay. The total phenolic and flavonoid contents were also assessed through the Folin-Ciocalteu and aluminum chloride methods, respectively. Antioxidant activities of the extracts were evaluated by using 2,2-diphenyl-1-picrylhydrazil (DPPH) radical scavenging and β-carotene-linoleic acid bleaching methods. The presence of phenolic compounds in Mn-EtOH was confirmed using HPLC. The extracts showed activity against most microorganisms tested. The extracts did not show any expressive antiproliferative effect in the assessment of cytotoxicity. The most significant total phenolic content was 153.00 ± 11.34 mg of gallic acid equivalent/g to the ethyl acetate extract (AcOEt). The total flavonoid content was 292.50 ± 70.34 mg of catechin equivalent/g to the AcOEt extract, which presented the best antioxidant activity (IC50 50.40 ± 1.16 μg/mL) for DPPH scavenging. We can conclude that this species shows strong antibacterial and antioxidant activities, as well as weak cytotoxic effects.


Resumo Este estudo foi realizado para avaliar as atividades antibacteriana, citotóxica e antioxidante de extratos de Morus nigra L. HPLC foi utilizado para determinar o perfil de compostos fenólicos do extrato etanólico bruto (Mn-EtOH). O efeito antibacteriano foi avaliado através do método de microdiluição. A citotoxicidade foi testada contra linhagens celulares de tumores humanos utilizando o ensaio do brometo de 3-(4,5-dimetil-2-tiazolil)-2,5-difenil-2H-tetrazólio (MTT). O conteúdo total de compostos fenólicos e flavonoides também foi avaliado por meio dos métodos de Folin-Ciocalteu e cloreto de alumínio, respectivamente. A atividade antioxidante dos extratos foi avaliada por meio do sequestro do radical livre 2,2-difenil-1-picrilhidrazil (DPPH) e co-oxidação do sistema β-caroteno-ácido linoleico. A presença de compostos fenólicos em Mn-EtOH foi confirmada utilizando HPLC. Os extratos mostraram atividade contra a maioria dos microrganismos testados. Os extratos não mostraram qualquer efeito antiproliferativo expressivo na avaliação da citotoxicidade. O conteúdo fenólico total mais significativo foi de 153,00 ± 11,34 mg de equivalente de ácido gálico/g para o extrato acetato de etila (AcOEt). O conteúdo de flavonoides totais foi de 292,50 ± 70,34 mg de equivalente de catequina/g para o extrato AcOEt, que apresentou a melhor atividade antioxidante (IC50 50,40 ± 1,16 mg/mL) para o sequestro do DPPH. Podemos concluir que esta espécie apresenta forte atividade antibacteriana e antioxidante, bem como fraca atividade citotóxica.


Subject(s)
Humans , Plant Extracts/pharmacology , Morus/chemistry , Anti-Bacterial Agents/pharmacology , Antioxidants/pharmacology , Phenols/analysis , Picrates/metabolism , Flavonoids/analysis , Biphenyl Compounds/metabolism , Plant Extracts/toxicity , Plant Extracts/chemistry , Cell Survival/drug effects , Cell Line, Tumor , Anti-Bacterial Agents/toxicity , Anti-Bacterial Agents/chemistry , Antioxidants/toxicity , Antioxidants/chemistry
11.
Braz. j. biol ; 78(1): 53-60, Feb. 2018. tab
Article in English | LILACS | ID: biblio-888834

ABSTRACT

Abstract The essential oils are extracted from plant compounds and can present activities antimicrobial and antioxidant properties. The goals of the present study were: (a) to determine the chemical composition of the essential oil of Guarea kunthiana A. Juss using the method of gas chromatography coupled to mass spectrometry (GC-MS); (b) to evaluate the antimicrobial potential of this oil using the broth microdilution method against different microorganisms: five Gram-negative bacteria, four Gram-positive bacteria and a yeast and (c) to determine the antioxidant activity of the oil using the DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical assay. The GC-MS analyses allowed identifying 13 constituents, representing 96.52% of the essencial oil composition. The main compounds identified were α-zingiberene (34.48%), β-sesquiphellandrene (22.90%), and α-curcumene (16.17%). With respect to the antimicrobial activity, the essential oil was effective against all the microorganisms tested, except for the bacteria E. coli and K. pneumoniae, which were resistant to the action of the oil. From a general point of view, Gram-positive bacteria were more susceptible to the action of the essential oil than Gram-negative bacteria. The essential oil exhibited antioxidant potential.


Resumo Os óleos essenciais são compostos extraídos de plantas e podem apresentar propriedades antimicrobianas e antioxidantes. O objetivo deste trabalho foi (a) determinar a composição química do óleo essencial de Guarea kunthiana A. Juss pelo método de cromatografia gasosa acoplada à espectrometria de massas (CG-EM); (b) avaliar o potencial antimicrobiano deste óleo pelo método de microdiluição em caldo frente a diferentes micro-organismos, sendo cinco bactérias Gram-negativas, quatro Gram-positivas uma levedura e (c) por fim, determinar a atividade antioxidante do óleo pelo método de captura do radical livre 2,2-difenil-1-picril hidrazil (DPPH). As análises de CG-EM resultaram na identificação de 13 constituintes, representando 96,52% da composição do óleo essencial. Os principais compostos identificados foram α-Zingibereno (34,48%), β-Sesquifelandreno (22,90%) e α-Curcumeno (16,17%). Em relação à atividade antimicrobiana, o óleo essencial foi efetivo frente a todos os micro-organismos testados exceto para as bactérias E. coli e K. pneumoniae, as quais se apresentaram resistentes à ação do óleo. Em geral, as bactérias Gram-positivas foram mais suscetíveis à ação do óleo essencial em relação às Gram-negativas. O óleo essencial apresentou potencial.


Subject(s)
Oils, Volatile/pharmacology , Oils, Volatile/chemistry , Meliaceae/chemistry , Anti-Infective Agents/pharmacology , Anti-Infective Agents/chemistry , Antioxidants/pharmacology , Antioxidants/chemistry , Picrates , Bacteria/drug effects , Biphenyl Compounds
12.
Braz. oral res. (Online) ; 32: e116, 2018. tab, graf
Article in English | LILACS | ID: biblio-974442

ABSTRACT

Abstract The aim of this study was to analyze the efficiency of experimental light-curing resin cements (ERCs) with a ternary photo-initiator system containing diphenyliodonium hexafluorphosphate (DPI) and different amines on retention of glass-fiber posts to dentin (GFP). ERCs formulations: a 1:1 mass ratio of 2,2-bis[4-(2-hydroxy-3-methacryloxypropoxy)phenylpropane and triethyleneglycol dimethacrylate. Camphorquinone was used as initiator. Six experimental groups were established according to the amine used: [ethyl-4-(dimethylamino)benzoate-EDMAB or 2-(dimethylamino)ethyl methacrylate-DMAEMA] and the concentration of DPI (0, 0.5 mol%, 1 mol%). The resin cements Variolink II (dual- and light-cured versions) were used as commercial reference. Eighty recently extracted bovine incisors (n = 10) were selected for this study. The roots were prepared and the fiber posts were cemented with the resin cement specified for each experimental group. Specimens from coronal, middle, and apical thirds of the root were subjected to push-out bond strength test 24 hours after bonding. Data were subjected to split-plot ANOVA and the Tukey test (p = 0.05). ERCs containing DPI showed statistically significant higher bond strengths compared with ERCs without DPI. ERCs containing DPI were statistically similar to VARIOLINK II - dual-cured and superior to VARIOLINK II - light-cured (except for EDMAB - 1DPI in the medium third and DMAEMA - 1DPI in the coronal third). Different amines did not influence post retention. The apical root region showed the lowest bond strength for the groups EDAB-0DPI, DMAEMA-0DPI and VARIOLINK II light-cured. Light-cured ERCs containing DPI were efficient for GFP retention to radicular dentin, with similar behaviour to that of dual-curing commercial resin cement.


Subject(s)
Onium Compounds/chemistry , Biphenyl Compounds/chemistry , Post and Core Technique , Tooth Apex/drug effects , Resin Cements/chemistry , Dentin/drug effects , Light-Curing of Dental Adhesives/methods , Photoinitiators, Dental/chemistry , Onium Compounds/radiation effects , Time Factors , Tooth Fractures , Biphenyl Compounds/radiation effects , Materials Testing , Analysis of Variance , Tooth Apex/radiation effects , Resin Cements/radiation effects , Dentin/radiation effects , Curing Lights, Dental , Photoinitiators, Dental/radiation effects , Polymerization , para-Aminobenzoates/radiation effects , para-Aminobenzoates/chemistry , Glass/radiation effects , Glass/chemistry , Methacrylates/radiation effects , Methacrylates/chemistry
13.
Bauru; s.n; 2018. 98 p. ilus, graf, tab.
Thesis in Portuguese | LILACS, BBO | ID: biblio-885097

ABSTRACT

O osteossarcoma (OS) é o tumor maligno primário mais comum do tecido ósseo, caracterizado pela formação de osteócitos anormais. Apesar do avanço nas terapias convencionais (quimioterapia e retirada do tumor), essas não conseguem eliminar totalmente as células tumorais e impedir a progressão da doença. Recentemente, agentes derivados de fontes naturais ganharam considerável atenção por causa de sua segurança, eficácia e disponibilidade imediata. Nesse sentido, a apocinina, inibidor do complexo NADPH-oxidase, vem sendo estudada como agente antitumoral em alguns tipos de câncer como: pâncreas, próstata, pulmão e mama. Apocinina é um pró-fármaco e sua ação parece estar relacionada à sua conversão produzindo a diapocinina, a qual se mostrou mais efetiva do que a apocinina. Portanto, o objetivo desse estudo é avaliar, in vitro, o potencial antitumoral da apocinina e diapocinina em células de osteossarcoma humano. Para isso, foram utilizados osteoblastos humanos normais (HOb) e osteossarcoma humano imortalizadas (SaOS-2) tratados ou não com apocinina e diapocinina em diversas concentrações. Foram realizados os ensaios de viabilidade celular, alterações morfológicas, apoptose celular, produção de espécies reativas de oxigênio (EROs), formação de colônias, migração, invasão e expressão do fator indutor de hipóxia-1alfa (HIF-1). Também foram conduzidos ensaios para verificar a atividade de metaloproteinase de matriz (MMP) 2 e 9. Os resultados em SaOS-2 mostraram que o tratamento com apocinina nas concentrações de 1,5 e 3 mM; e diapocinina nas concentrações de 0,75 e 1,5 mM reduziram a viabilidade; aumentaram o número de células em apoptose e diminuíram a produção de EROs; sem causar danos às células HOb. Além disso, essas mesmas concentrações inibiram a migração e invasão celular; diminuíram a expressão de HIF-1; e reduziram a atividade de MMP-2 em SaOS-2. Considerando os resultados obtidos, concluímos que a apocinina e diapocinina podem atuar como possíveis moduladores de células tumorais, sendo que a diapocinina mostrou ser mais efetiva nos parâmetros testados.(AU)


Osteosarcoma (OS) is the most common primary malignant tumor of bone tissue, characterized by the formation of abnormal osteocytes. Despite advances in conventional therapies (chemotherapy and surgery) they cannot completely eliminate tumor cells and prevent the progression of the disease. Recently, agents derived from natural sources have achieved considerable attention because of their safety, efficacy and immediate availability of therapies. In this way, apocynin, an inhibitor of the NADPH-oxidase complex, has been studied as an antitumor agent in some types of cancer, such as pancreas, prostate, lung and breast. Apocynin is a prodrug and its action indicate to be related to its conversion to diapocynin, which has been shown to be more efficient than apocynin itself. Thus, the aim of this study is to evaluate, in vitro, the antitumor potential of apocynin and diapocynin in human osteosarcoma cells. For this, normal human osteoblasts (HOb) and immortalized human osteosarcoma cells (SaOS-2) were treated or no-treated with apocynin and diapocynin in various concentrations. Cell viability assay, morphological alterations, cellular apoptosis, reactive oxygen species (ROS) production, colony formation, migration, invasion and expression of hypoxia-inducible factor-1 alpha (HIF-1) were performed. We also performed assays to verify the activity of matrix metalloproteinase (MMP) 2 and 9. The results in SaOS-2 showed that treatment with apocynin at concentrations of 1,5 e 3 mM; and diapocynin at concentrations of 0,75 e 1,5 mM reduced cell viability; increased the number of cells in apoptosis and decreased the production of ROS; without damaging HOb cells. Moreover, these same concentrations inhibited cell migration and invasion; decreased HIF-1 expression; and reduced MMP 2 activity in SaOS-2. Considering the results, we suggest that apocynin and diapocynin may act as possible modulators of tumor cells, and diapocynin has been shown to be more effective.(AU)


Subject(s)
Humans , Acetophenones/pharmacology , Antineoplastic Agents/pharmacology , Biphenyl Compounds/pharmacology , Osteosarcoma/drug therapy , Apoptosis/drug effects , Cell Movement/drug effects , Cell Survival/drug effects , Matrix Metalloproteinase 2/drug effects , Matrix Metalloproteinase 9/drug effects , Osteoblasts/drug effects , Reactive Oxygen Species/analysis , Reproducibility of Results , Tumor Cells, Cultured
14.
Journal of Integrative Medicine ; (12): 358-366, 2018.
Article in English | WPRIM | ID: wpr-691054

ABSTRACT

<p><b>OBJECTIVE</b>Myanmar has a long history of using medicinal plants for treatment of various diseases. To the best of our knowledge there are no previous reports on antiglycation activities of medicinal plants from Myanmar. Therefore, this study was aimed to evaluate the antioxidant, antiglycation and antimicrobial properties of 20 ethanolic extracts from 17 medicinal plants indigenous to Myanmar.</p><p><b>METHODS</b>In vitro scavenging assays of 2,2-diphenyl-1-picrylhydrazyl (DPPH), nitric oxide (NO), superoxide (SO) radicals were used to determine the antioxidant activities. Folin-Ciocalteu's method was performed to determine the total phenolic content. Antiglycation and antimicrobial activities were detected by bovine serum albumin-fluorescent assay and agar well diffusion method.</p><p><b>RESULTS</b>Terminalia chebula Retz. (Fruit), containing the highest total phenolic content, showed high antioxidant activities with inhibition of 77.98% ± 0.92%, 88.95% ± 2.42%, 88.56% ± 1.87% and 70.74%± 2.57% for DPPH, NO, SO assays and antiglycation activity respectively. It also showed the antimicrobial activities against Staphylococcus aureus, Bacillus cereus, Escherichia coli, Pseudomonas aeruginosa and Candida albicans with inhibition zone of 19, 18, 17, 25 and 15 mm, respectively. Garcinia mangostana Linn. showed the strongest activities for SO and antiglycation assays with inhibition of 93.68% ± 2.63% and 82.37% ± 1.78%. Bark of Melia sp. was the best NO radical scavenger with inhibition rate of 89.39%± 0.60%.</p><p><b>CONCLUSION</b>The results suggest that these plants are potential sources of antioxidants with free radical-scavenging and antiglycation activities and could be useful for decreasing the oxidative stress and glycation end-product formation in glycation-related diseases.</p>


Subject(s)
Anti-Bacterial Agents , Pharmacology , Anti-Infective Agents , Pharmacology , Antioxidants , Pharmacology , Bacteria , Biphenyl Compounds , Metabolism , Candida albicans , Fruit , Garcinia , Chemistry , Glycation End Products, Advanced , Metabolism , Humans , Magnoliopsida , Chemistry , Medicine, Traditional , Melia , Chemistry , Myanmar , Nitric Oxide , Metabolism , Oxidative Stress , Phenols , Pharmacology , Phytotherapy , Picrates , Metabolism , Plant Bark , Plant Extracts , Chemistry , Pharmacology , Plants, Medicinal , Superoxides , Terminalia , Chemistry
15.
Article in Chinese | WPRIM | ID: wpr-775294

ABSTRACT

OBJECTIVE@#To investigate the effects of Honokiol on cognitive function in mice with epilepsy.@*METHODS@#Kainic acid (38 mg/kg) was intraperitoneally injected in 5 weeks old male ICR mice to induce epilepsy. Honokiol at dose of 3, 10, 30 mg/kg was given to epilepic mice by intraperitoneal injection for 10 days. Fluoro-Jade B staining was used to assess neuronal death; Morris water maze and Y maze tests were used to measure cognitive function such as learning and memory; Western blot was performed to detect the expression of acetylated superoxide dismutase (SOD), microtubule associated protein 1 light chain 3-Ⅱ (LC3-Ⅱ) and P62 in hippocampus tissue; thiobarbituric acid and WST-1 methods were used to detect malondialdehyde (MDA) and SOD.@*RESULTS@#Compared with control group, the levels of acetylated-SOD, MDA, LC3-Ⅱ, P62 and neuronal death increased, cognitive function and SOD decreased in model group (<0.05 or <0.01). Honokiol at the dose of 10 mg/kg and 30 mg/kg decreased SOD acetylation, MDA content, expression of LC3-Ⅱ and P62, as well as neuronal death, and the cognitive function was improved (<0.05 or <0.01), especially in 30 mg/kg Honokiol group.@*CONCLUSIONS@#Honokiol alleviates oxidative stress and autophagy degradation disorder, decreases neuronal death, and therefore improves cognitive function in epilepsy mice.


Subject(s)
Animals , Biphenyl Compounds , Pharmacology , Cognition , Epilepsy , Gene Expression Regulation , Hippocampus , Kainic Acid , Lignans , Pharmacology , Male , Malondialdehyde , Maze Learning , Mice , Mice, Inbred ICR , Neurons , Superoxide Dismutase , Genetics
16.
Article in Chinese | WPRIM | ID: wpr-813205

ABSTRACT

To explore the therapeutic effect of honokiol on particulate matter 2.5 (PM2.5)-induced lung injury in asthmatic mice and the possible mechanisms.
 Methods: A total of 32 BALB/C mice were randomly divided into four groups: a normal saline group, a model group, a PM2.5 group and a honokiol group (n=8 in each group). The asthma mouse model was established by ovalbumin treatment. The mice were treated with physiological saline, ovalbumin, PM2.5 and honokiol, respectively. Lung tissues and serum were collected. The pathological changes of lung tissues were evaluated. The levels of inflammatory cytokines in bronchoalveolar lavage fluid (BALF) and serum were measured and the expressions of Toll like receptor 4 (TLR4), nuclear factor kappa B (NF-κB), retinoid-related orphan receptor gamma-t (RORγt) and forkhead box protein 3 (Foxp3) in lung tissues were detected.
 Results: 1) The lung tissues of mice in the asthma group showed obvious pathological changes and inflammatory state, suggesting that the asthma model was established successfully. PM2.5 could aggravate the pathological condition of inflammatory injury in lung tissues in asthmatic mice. 2) Compared to the PM2.5 group, the pathological symptoms in the lung tissues were alleviated in the honokiol group and the percentage of inflammatory cells in BALF and the levels of inflammatory cytokines in BALF and serum were significantly reduced (all P<0.05). 3) Compared to the PM2.5 group, the expressions of TLR4, NF-κB (p-p65) and RORγt in lung tissues were significantly decreased, while the expression of Foxp3 was increased; the ratio of RORγt/Foxp3 was also decreased in the honokiol group (all P<0.05).
 Conclusion: Honokiol can resist lung injury induced by PM2.5 in asthmatic mice. These effects are through inhibiting TLR4-NF-κB pathway-mediated inflammatory response or regulating the balance of Th17/Treg cells.


Subject(s)
Animals , Asthma , Biphenyl Compounds , Pharmacology , Bronchoalveolar Lavage Fluid , Chemistry , Cytokines , Disease Models, Animal , Drugs, Chinese Herbal , Pharmacology , Inflammation Mediators , Lignans , Pharmacology , Lung , Metabolism , Pathology , Lung Injury , Drug Therapy , Metabolism , Pathology , Mice , Mice, Inbred BALB C , NF-kappa B , Metabolism , Ovalbumin , Particulate Matter , Toxicity , Random Allocation , Toll-Like Receptor 4 , Metabolism
17.
Article in Chinese | WPRIM | ID: wpr-813151

ABSTRACT

To explore the effects of honokiol (HKL) on pulmonary microvascular endothelial cells in lipopolysaccharide (LPS)-induced acute respiratory distress syndrome (ARDS) and the underlying mechanisms.
 Methods: In animal experiment, a total of 40 C57BL/6J mice were randomly divided into a control group (Con group), a LPS intervention group (LPS group), a LPS+honokiol (HKL) intervention group (HKL group) and a LPS+HKL+nicotinamide (NAM) intervention group (NAM group) (n=10 in each group). In the cell experiment, the experiment cells were divided into a control group (Con group), a LPS intervention group (LPS group), a LPS+HKL intervention group (HKL group), a LPS+HKL+NAM intervention group (NAM group), and a LPS+HKL+compound C (CMC) intervention group (CMC group). The pathological changes of the lung tissues were evaluated by hematoxylin and eosin (HE) staining; the protein concentration, total cells and neutrophils in the bronchoalveolar lavage fluid (BALF) and myeloperoxidase (MPO) activity in the lung tissues were detected; the changes of pulmonary microvascular permeability were determined by Evans blue assay; the effect of HKL on the vitality of human pulmonary microvascular endothelial cells were examined by cell counting kit-8 (CCK-8); the inhibitors including NAM and CMC were applied to explore the molecular mechanism of the protective effects of HKL. The expression levels of Sirt3, caspase-3, cleaved caspase-3, Bcl-2, Bax, p-adenosine monophosphate activated protein kinase (p-AMPK) and AMPK in lung tissues or cells were detected by Western blot.
 Results: In animal models, compared with the Con group, the mice in the LPS group displayed typical ARDS pathological changes, and the ratio of lung wet/dry weight (W/D) and MPO activity in the lung tissues, protein concentration, total cells and neutrophils in BALF, Evans blue leaking index (ELI), expression levels of cleaved caspase-3 were significantly increased (all P<0.05), while the expression levels of Sirt3 was obviously decreased (P<0.05). Compared with the LPS group, the above changes in the LPS group were significantly improved in the HKL group (all P<0.05); Compared with the HKL group, the curative effect of HKL intervention could be partly inhibited in the NAM group (P<0.05). In cell experiments, compared with the LPS group, the HPMECs viability in the HKL group was markedly improved (P<0.05), while the expression levels of Bcl-2 and Sirt3 were significantly upregulated (P<0.05), and the expression levels of Bax and cleaved caspase-3 were significantly downregulated (P<0.05), accompanied by the activation of AMPK pathway (P<0.05) in the HKL group. Compared with the HKL group, the curative effect of HKL intervention was partly inhibited in the CMC group (P<0.05).
 Conclusion: HKL can significantly attenuate LPS-induced lung injury and inhibit the apoptosis of pulmonary microvascular endothelial cells through regulation of Sirt3/AMPK pathway.


Subject(s)
AMP-Activated Protein Kinases , Metabolism , Acute Lung Injury , Drug Therapy , Animals , Biphenyl Compounds , Pharmacology , Therapeutic Uses , Humans , Lignans , Pharmacology , Therapeutic Uses , Lipopolysaccharides , Lung , Mice , Mice, Inbred C57BL , Mitochondria , Metabolism , Signal Transduction , Sirtuin 3 , Metabolism
18.
Arch. cardiol. Méx ; 87(4): 316-325, oct.-dic. 2017. tab, graf
Article in English | LILACS | ID: biblio-887542

ABSTRACT

Abstract: Objective: To evaluate efficacy and safety of 60 mg and 120 mg Fimasartan (FMS) alone or combined with 12.5 mg hydrochlorothiazide (HCTZ) in a Mexican population. Methods: A six month, treat-to-target, open study was conducted on subjects with grade 1-2 hypertension. The subjects were initially treated with 60 mg FMS once daily. In week 8, those with Diastolic Blood Pressure (DBP) <90 mmHg continued on the same FMS dose during the rest of the study, while those with DBP ≥90 mmHg were randomised to either 120 mg FMS or 60 mg FMS + 12.5 mg HCTZ once daily. In week 12, randomised subjects with DBP ≥90 mmHg received 120 mg FMS + 12.5 mg HCTZ, while those achieving target continued with their assigned treatment until the end of the study. Results: FMS 60 mg (n = 272) decreased both DBP and Systolic Blood Pressure (SBP) by 11.3 ± 8.9 (p<.0001) and 16.0 ± 14.1 (p<.0001) mmHg, respectively, with 75.4% of subjects reaching the treatment target. Subjects assigned to FMS 120 mg, FMS 60 mg + HCTZ 12.5 mg, or FMS 120 mg + HCTZ 12.5 mg once daily, showed significant reductions in DBP and SBP with their assigned treatment. At the end of the study, 237/272 subjects (87.1%) achieved a DBP < 90 mmHg and an SBP<140 mmHg. The most frequently reported adverse reactions included headache (3.7%), dry mouth (1.1%), transient liver enzyme increase (1.1%), and dizziness (0.7%). Conclusion: Fimasartan is safe and effective in Mexican subjects with grade 1-2 essential hypertension.


Resumen: Objetivo: Evaluar la eficacia y la seguridad de 60 y 120 mg de fimasartán (FMS) solo o combinado con 12.5 mg de hidroclorotiazida (HCTZ) en población mexicana. Métodos: Estudio abierto, de 24 semanas, con tratamiento escalado hasta el objetivo terapéutico en sujetos hipertensos grados 1-2. Tratamiento inicial: FMS 60 mg una vez al día; en la semana 8, los sujetos con presión arterial diastólica (PAD) <90 mmHg mantuvieron su tratamiento inicial durante el estudio, mientras que los sujetos con PAD ≥90 mmHg fueron aleatorizados a 120 mg de FMS o a 60 mg de FMS + 12.5 mg de HCTZ. En la semana 12, los sujetos aleatorizados con PAD ≥90 mmHg recibieron 120 mg de FMS + 12.5 mg de HCTZ; quienes alcanzaron el objetivo terapéutico mantuvieron su tratamiento asignado hasta finalizar el estudio. Resultados: FMS 60 mg (n = 272) disminuyó la PAD y la presión arterial sistólica (PAS) en 11.3 ± 8.9 (p < 0.0001) y 16.0 ± 14.1 (p < 0.0001) mmHg, respectivamente, con logro del objetivo de tratamiento en el 75.4% de los sujetos. Los sujetos asignados a 120 mg de FMS, a 60 mg de FMS + 12.5 mg de HCTZ 12.5 y a 120 mg de FMS + 12.5 mg de HCTZ mostraron reducciones significativas de PAD y PAS; al final del estudio, 237/272 sujetos (87.1%) lograron PAD <90 y PAS <140 mmHg. Las reacciones adversas más frecuentemente reportadas fueron: cefalea (3.7%), boca seca (1.1%), incremento de enzimas hepáticas (1.1%) y mareo (0.7%). Conclusión: FMS es seguro y eficaz en sujetos mexicanos con hipertensión esencial de grados 1-2.


Subject(s)
Humans , Male , Female , Middle Aged , Pyrimidines/administration & dosage , Tetrazoles/administration & dosage , Biphenyl Compounds/administration & dosage , Essential Hypertension/drug therapy , Hydrochlorothiazide/administration & dosage , Antihypertensive Agents/administration & dosage , Pyrimidines/adverse effects , Tetrazoles/adverse effects , Biphenyl Compounds/adverse effects , Severity of Illness Index , Prospective Studies , Treatment Outcome , Drug Therapy, Combination , Mexico , Antihypertensive Agents/adverse effects
19.
An. acad. bras. ciênc ; 89(3): 1671-1681, July-Sept. 2017. tab, graf
Article in English | LILACS | ID: biblio-886765

ABSTRACT

ABSTRACT Fatty acid methyl esters (FAMEs) were obtained from vegetable oils of soybean, corn and sunflower. The current study was focused on evaluating the antifungal activity of FAMEs mainly against Paracoccidioides spp., as well as testing the interaction of these compounds with commercial antifungal drugs and also their antioxidant potential. FAMEs presented small IC50 values (1.86-9.42 μg/mL). All three FAMEs tested showed antifungal activity against isolates of Paracoccidioides spp. with MIC values ranging from 15.6-500 µg/mL. Sunflower FAMEs exhibited antifungal activity that extended also to other genera, with an MIC of 15.6 μg/mL against Candida glabrata and C. krusei and 31.2 μg/mL against C. parapsilosis. FAMEs exhibited a synergetic effect with itraconazole. The antifungal activity of the FAMEs against isolates of Paracoccidioides spp. is likely due to the presence of methyl linoleate, the major compound present in all three FAMEs. The results obtained indicate the potential of FAMEs as sources for antifungal and antioxidant activity.


Subject(s)
Paracoccidioides/drug effects , Picrates/pharmacology , Soybeans/chemistry , Biphenyl Compounds/pharmacology , Plant Oils/pharmacology , Zea mays/chemistry , Helianthus/chemistry , Antifungal Agents/pharmacology , Picrates/isolation & purification , Biphenyl Compounds/isolation & purification , Plant Oils/chemistry , Microbial Sensitivity Tests , Drug Resistance, Fungal , Lethal Dose 50 , Gas Chromatography-Mass Spectrometry , Antifungal Agents/isolation & purification
20.
An. acad. bras. ciênc ; 89(2): 1111-1120, Apr.-June 2017. tab, graf
Article in English | LILACS | ID: biblio-886682

ABSTRACT

ABSTRACT Myrciaria floribunda (H. West ex Willd.) O. Berg, Myrtaceae, is a native plant species of the Atlantic Rain Forest, from north to south of Brazil. The lyophilized ethyl acetate extract from the leaves of M. floribunda was investigated for its antiproliferative activity in tumor cell lines, antioxidant capacity and its total phenolic, flavonoid and tannin contents. Antiproliferative activity was tested in vitro against seven human cancer cells and against immortalized human skin keratinocytes line (HaCat, no cancer cell). Antioxidant activity was determined using 1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging and oxygen radical absorbing capacity (ORAC) assays and total phenolic, flavonoid and tannin contents were determined by spectrophotometric techniques. Ethyl acetate extract of M. floribunda exhibited antiproliferative activity against cancer cell lines with total growth inhibition (TGI) between 69.70 and 172.10 µg/mL. For HaCat cell, TGI value was 213.60 µg/mL. M. floribunda showed a strong antioxidant potential: EC50 of 45.89±0.42 µg/mL and 0.55±0.05 mmol TE/g for DPPH and ORAC, respectively. Total phenolic content was 0.23±0.013g gallic acid equivalents (GAE)/g extract and exhibited 13.10±1.60% of tannins content. The content of flavonoid was 24.08±0.44% expressed as rutin equivalents. These results provide a direction for further researches about the antitumoral potential of M. floribunda.


Subject(s)
Humans , Phenols/analysis , Flavonoids/analysis , Myrtaceae/chemistry , Cell Proliferation/drug effects , Antioxidants/pharmacology , Picrates , Biphenyl Compounds , Brazil , Cell Line, Tumor , Oxygen Radical Absorbance Capacity , Indicators and Reagents , Acetates/pharmacology , Acetates/chemistry
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