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1.
Chinese Journal of Biotechnology ; (12): 580-592, 2021.
Article in Chinese | WPRIM | ID: wpr-878583

ABSTRACT

A novel β-glucosidase BglD2 with glucose and ethanol tolerant properties was screened and cloned from the deep-sea bacterium Bacillus sp. D1. The application potential of BglD2 toward polydatin-hydrolyzing was also evaluated. BglD2 exhibited the maximal β-glucosidase activity at 45 °C and pH 6.5. BglD2 maintained approximately 50% of its origin activity after incubation at 30 °C and pH 6.5 for 20 h. BglD2 could hydrolyze a variety of substrates containing β (1→3), β (1→4), and β (1→6) bonds. The activity of β-glucosidase was enhanced to 2.0 fold and 2.3 fold by 100 mmol/L glucose and 150 mmol/L xylose, respectively. BglD2 possessed ethanol-stimulated and -tolerant properties. At 30 °C, the activity of BglD2 enhanced to 1.2 fold in the presence of 10% ethanol and even remained 60% in 25% ethanol. BglD2 could hydrolyze polydatin to produce resveratrol. At 35 °C, BglD2 hydrolyzed 86% polydatin after incubation for 2 h. Thus, BglD2 possessed glucose and ethanol tolerant properties and can be used as the potential candidate of catalyst for the production of resveratrol from polydatin.


Subject(s)
Enzyme Stability , Glucose , Glucosides/pharmacology , Hydrogen-Ion Concentration , Stilbenes/pharmacology , Substrate Specificity , Temperature , Xylose , beta-Glucosidase/genetics
2.
Arq. bras. med. vet. zootec. (Online) ; 72(2): 295-304, Mar./Apr. 2020. tab
Article in English | ID: biblio-1128154

ABSTRACT

The objectives of this study were to evaluate goat sperm sorting in continuous Percoll® density gradients and gamete freezability, in the presence or absence of phenolic antioxidants. For this, semen pools were sorted, frozen, and evaluated. The non-selected group (NSg) presented lower progressive motility (PM), linearity (LIN), straightness (STR), and wobble (WOB) than the selected groups, and straight line velocity (VSL) compared to those with catechin or resveratrol. The amplitude of lateral head displacement (ALH) was higher in NSg, and quercetin reduced the mitochondrial membrane potential (MMP). After thawing, the NSg presented lower PM than the selected groups, VSL and VAP (average path velocity) than the selected group with or without catechin, LIN and WOB than the selected with or without catechin or resveratrol, and STR than the selected with catechin. Moreover, NSg presented higher ALH and BCF than the samples selected with or without catechin. Plasma membrane integrity and intact and living cells were higher in the selected groups, and MMP was lower in the NSg and the selected group with quercetin. Thus, centrifugation in Percoll® continuous density gradients is a viable methodology to select goat sperm compatible with the freezing, especially in the presence of catechin or resveratrol.(AU)


Objetivou-se avaliar a separação de espermatozoides caprinos em gradientes de densidade contínuos de Percoll® e a congelabilidade espermática, com ou sem antioxidantes fenólicos. Para tal, pools seminais foram selecionados, congelados e avaliados. O grupo não selecionado (gNS) apresentou menor motilidade progressiva (MP), linearidade (LIN), retilinearidade (STR) e oscilação (WOB) do que os selecionados, bem como menor velocidade linear progressiva (VSL) do que os com catequina ou resveratrol. A amplitude de deslocamento lateral de cabeça (ALH) foi maior no gNS e a quercetina reduziu o potencial de membrana mitocondrial (PMM). Após a descongelação, o gNS manifestou menor MP do que os selecionados, menor VSL e VAP (velocidade média da trajetória) do que os com ou sem catequina, menor LIN e WOB do que os com ou sem catequina ou resveratrol, e menor STR do que os com catequina, além de maior ALH e BCF do que os com ou sem catequina. A integridade da membrana plasmática e as células intactas e vivas foram maiores nas amostras selecionadas e o PMM foi inferior no gNS e no selecionado com quercetina. Portanto, a centrifugação em gradientes contínuos de densidade de Percoll® é uma metodologia viável para selecionar espermatozoides caprinos compatíveis com a congelação, especialmente na presença de catequina ou resveratrol.(AU)


Subject(s)
Animals , Male , Semen , Spermatozoa , Stilbenes/administration & dosage , Ruminants/physiology , Cryopreservation/veterinary , Phenolic Compounds/analysis , Oxidative Stress , Antioxidants
3.
Chinese Medical Journal ; (24): 2905-2909, 2020.
Article in English | WPRIM | ID: wpr-877912

ABSTRACT

BACKGROUND@#Benvitimod cream, a novel synthetic small molecule, was effective in treating mild-to-moderate plaque psoriasis. We conducted a phase III clinical trial to assess the efficacy and safety of benvitimod cream in patients with mild-to-moderate plaque psoriasis.@*METHODS@#We randomly assigned 686 patients (2:1:1) to receive 1% benvitimod cream, 0.005% calcipotriol ointment or placebo twice a day for 12 weeks. The primary efficacy end points were the percentage of patients with a 75% or greater reduction from baseline in the psoriasis area and severity index (PASI 75) score and with a score of 0 or 1 in static physician's global assessment (sPGA) at week 12.@*RESULTS@#The results showed that 50.4% of patients in the benvitimod group achieved PASI 75, which was significantly higher than that in the calcipotriol (38.5%, P < 0.05) and placebo (13.9%, P < 0.05) groups. The proportion of patients achieving an sPGA score 0 or 1 was 66.3% in the benvitimod group and 63.9% in the calcipotriol group, which were both significantly higher than that in the placebo group (34%, P < 0.05). In the long-term follow-up study, 50.8% of patients experienced recurrence. After retreatment with 1% benvitimod, 73.3% of patients achieved an sPGA score of 0 or 1 again at week 52. Adverse events included application site irritation, follicular papules, and contact dermatitis. No systemic adverse reactions were reported.@*CONCLUSION@#During this 12-week study, benvitimod cream was demonstrated with high effectiveness and safety in patients with mild-to-moderate plaque psoriasis.@*TRIAL REGISTRATION@#Chinese Clinical Trial Registry (ChiCTR), ChiCTR-TRC-13003259; http://www.chictr.org.cn/showprojen.aspx?proj=6300.


Subject(s)
Double-Blind Method , Follow-Up Studies , Humans , Ointments , Psoriasis/drug therapy , Resorcinols , Severity of Illness Index , Stilbenes , Treatment Outcome
4.
Article in Chinese | WPRIM | ID: wpr-827964

ABSTRACT

Stilbenes is a class of natural polyphenols with 1,2-diphenylethylene as the skeleton structure which have structural and active diversity. However, there are fewer studies on their metabolic process, which limits the in-depth research and development of such components. An UPLC-MS/MS method simultaneously determining contents of ten stilbenes was firstly established in this study and applied to study the ten stilbenes of peony seed coats in the serum of C57 mice.Piceatannol was the internal standard, and methanol was used for protein precipitation, UPLC-MS/MS with negative ion mode was used for analysis, and the method was validated.The serum samples were collected and detected after mice being oral administered with 800 mg·kg~(-1) peony seed coat extracts for 8 weeks. The results showed that suffruticosol A, suffruticosol B, suffruticosol C, trans-ε-viniferin, cis-gnetin H, trans-suffruticosol D and trans-gnetin H were detected in serum samples, and the highest is suffruticosol A. The method is simple and quick with high specificity and sensitivity, and it is suitable for quantitative determination of ten stilbenes in the serum of mice.


Subject(s)
Animals , Chromatography, High Pressure Liquid , Chromatography, Liquid , Mice , Paeonia , Reproducibility of Results , Seeds , Chemistry , Stilbenes , Tandem Mass Spectrometry
5.
Article in English | WPRIM | ID: wpr-776892

ABSTRACT

Antifungal drug resistance is a significant clinical problem, and antifungal agents that can evade resistance are urgently needed. In infective niches, resistant organisms often co-existed with sensitive ones, or a subpopulation of antibiotic-susceptible organisms may evolve into resistant ones during antibiotic treatment and eventually dominate the whole population. In this study, we established a co-culture assay in which an azole-resistant Candida albicans strain was mixed with a susceptible strain labeled with green fluorescent protein to mimic in vivo conditions and screen for antifungal drugs. Fluconazole was used as a positive control to verify the validity of this co-culture assay. Five natural molecules exhibited antifungal activity against both susceptible and resistant C. albicans. Two of these compounds, retigeric acid B (RAB) and riccardin D (RD), preferentially inhibited C. albicans strains in which the efflux pump MDR1 was activated. This selectivity was attributed to greater intracellular accumulation of the drugs in the resistant strains. Changes in sterol and lipid compositions were observed in the resistant strains compared to the susceptible strain, and might increase cell permeability to RAB and RD. In addition, RAB and RD interfered with the sterol pathway, further aggregating the decrease in ergosterol in the sterol synthesis pathway in the MDR1-activated strains. Our findings here provide an alternative for combating resistant pathogenic fungi.


Subject(s)
ATP-Binding Cassette Transporters , Genetics , Metabolism , Antifungal Agents , Chemistry , Metabolism , Pharmacology , Azoles , Pharmacology , Biosynthetic Pathways , Genetics , Candida albicans , Chemistry , Metabolism , Cell Membrane , Chemistry , Metabolism , Coculture Techniques , Drug Resistance, Fungal , Ergosterol , Metabolism , Fungal Proteins , Genetics , Metabolism , Lipids , Chemistry , Molecular Structure , Permeability , Phenyl Ethers , Chemistry , Metabolism , Pharmacology , Sterols , Chemistry , Metabolism , Stilbenes , Chemistry , Metabolism , Pharmacology , Triterpenes , Chemistry , Metabolism , Pharmacology
6.
Natural Product Sciences ; : 244-247, 2019.
Article in English | WPRIM | ID: wpr-760565

ABSTRACT

A new isoprenylated stilbene, flavestinK (1) together with two known isoprenylated stilbenes, flavestin B (2), flavestin G (3), and two isoprenilated flavanones, 4-O-methyl-8-isoprenylnaringenin (4) and 8-isoprenyl-5,7-dihydroxyflavanone (5) were isolated from the leaves of Macaranga recurvata Gage. All of the structures have been determined based on HRESIMS, 1D and 2D NMR spectral data. All of the isolated compounds were evaluated for their cytotoxicity against three human cancer cells (HeLa, T47D and WiDr). Compound 1 showed higher activity than doxorubicin against HeLa cells with IC₅₀ value of 13.1 µg/mL.


Subject(s)
Doxorubicin , Euphorbiaceae , Flavanones , HeLa Cells , Humans , Stilbenes
7.
Braz. j. med. biol. res ; 52(12): e8834, 2019. graf
Article in English | LILACS | ID: biblio-1055472

ABSTRACT

Polydatin (PD), a monocrystalline polyphenolic drug mainly found in the roots of Polygonum cuspidatum, has various pharmacological activities. Long non-coding RNAs (lncRNA) DiGeorge syndrome critical region gene 5 (DGCR5) was found to participate in the suppression of multiple cancers. Here, we proposed to study the effect of PD on myocardial infarction (MI) by inducing DGCR5. CCK-8 assay was performed to detect the viability of H9c2 cells. Flow cytometry was utilized to test apoptosis of H9c2 cells. These results determined the optimal concentration and effect time of hypoxia as well as PD. Si-DGCR5 was transfected into cells and the expression level was determined by qRT-PCR. Western blot was utilized to evaluate the expression of apoptosis-related proteins, Bcl-2, Bax, and cleaved-caspase-3, as well as autophagy-associated proteins including Beclin-1, p62, and LC3-II/LC3-I. As a result, PD efficiently attenuated hypoxia-induced apoptosis and autophagy in H9c2 cells. The expression of DGCR5 was down-regulated by hypoxia and up-regulated by PD. Besides, knocking-down the expression of DGCR5 inhibited the protection of PD in H9c2 cells. In addition, PD up-regulated the accumulation of DGCR5, DGCR5 decreased the expression of Bcl-2 and p62, raised the expression of Bax and cleaved-caspase-3, and the proportion of LC3-II/LC3-I. PD stimulated the PI3K/AKT/mTOR and MEK/ERK signaling pathways via up-regulating the expression of DGCR5. Our data demonstrated that PD reduced cell apoptosis and autophagy induced by hypoxia in cardiomyocytes. Moreover, PD activated PI3K/AKT/mTOR and MEK/ERK signaling pathways by up-regulating the expression of DGCR5.


Subject(s)
Animals , Rats , Stilbenes/pharmacology , Cell Hypoxia/drug effects , Apoptosis/drug effects , Myocytes, Cardiac/drug effects , Cell Proliferation/drug effects , RNA, Long Noncoding/drug effects , Glucosides/pharmacology , Signal Transduction , Up-Regulation/drug effects , Cell Line , Cytoprotection , Myocytes, Cardiac/metabolism , Myocytes, Cardiac/pathology
8.
Int. j. morphol ; 36(2): 391-394, jun. 2018. tab, graf
Article in English | LILACS | ID: biblio-954126

ABSTRACT

Resveratrol in cell culture media increases osteoblastic markers. Also results from previous studies provide evidence for resveratrol positive effects on bone healing and bone production. In this preclinical study we investigated bone healing in rats by resveratrol systemic application. 30 Wistar male rats were divided into two groups (study group and control group). At first, maxillary second molars of rats were extracted. The rats were kept in laboratory for next 28 days. Study group received resveratrol 20 mg/kg by abdominal injection every day. The control group received placebo in the same manner that study group. Rats were sacrificed after 28 days and bone samples were collected from center of maxillary second molar socket. Samples were evaluated histologically for new bone formation, inflammation, necrosis, fibrosis and foreign body reaction. The mean difference of new bone formation in control group (28.30 %) and study group (45 %) were statistically significant (P=0.014). There were no significant differences in inflammation, fibrosis, necrosis and foreign body reaction (P>0.05). Resveratrol has positive effects on bone healing but more evidence needed from more clinical and animal studies.


El resveratrol en los medios de cultivo celular aumenta los marcadores osteoblásticos. Los resultados de estudios anteriores proporcionan evidencia de efectos positivos del resveratrol sobre la curación ósea y la producción ósea. En este estudio preclínico, investigamos la curación ósea en ratas mediante la aplicación sistémica de resveratrol. Se dividieron 30 ratas macho Wistar en dos grupos (estudio y control). Inicialmente se extrajeron los segundos molares maxilares de las ratas y los animales se mantuvieron en el laboratorio durante los siguientes 28 días. El grupo de estudio recibió todos los días resveratrol 20 mg/kg por inyección abdominal . El grupo control recibió placebo de la misma manera que el grupo estudio. Las ratas fueron sacrificadas después de 28 días y se recogieron muestras de hueso del centro del segundo molar maxilar. Las muestras se evaluaron histológicamente para la formación de hueso nuevo, inflamación, necrosis, fibrosis y reacción de cuerpo extraño. La media de formación de hueso nuevo en el grupo control (28,30 %) y en el grupo estudio (45 %) fueron estadísticamente significativas (P=0,014). No hubo diferencias significativas en la inflamación, fibrosis, necrosis y reacción al cuerpo extraño (P>0,05). El resveratrol tiene efectos positivos sobre la curación de los huesos, pero aún es necesario realizar más pruebas de estudios clínicos, como también en animales.


Subject(s)
Animals , Rats , Osteoblasts/drug effects , Osteoclasts/drug effects , Stilbenes/pharmacology , Bone Development/drug effects , Osteogenesis/drug effects , Rats, Wistar , Dietary Supplements
9.
Int. j. morphol ; 36(2): 584-591, jun. 2018. tab, graf
Article in English | LILACS | ID: biblio-954158

ABSTRACT

Among the neurodegenerative disorders, Parkinson disease (PD) is ranked as second most common. The pathological hallmark is selective degeneration of the dopaminergic neurons in the nigro-striatal regions of brain with appearance of the Lewy bodies. Present study explores the neuro-protective potential of polydatin in terms of amelioration of degeneration of dopaminergic neurons in nigro-striatal regions of brain and distorted neuromotor behavior in the rotenone model of Parkinson's disease. Thirty-six male Sprague Dawley rats were divided into three groups. Group A (control), Group B (rotenone treated) and Group C (rotenone+polydatin treated). Rotenone was administrated intraperitoneally (i.p) at a dose of 3 mg/kg/body weight while polydatin was given i.p. at a dose of 50 mg/ kg/body weight for four weeks. Then, animals were sacrificed; substantia nigra (SN) & striatum isolated from brain and five micron thick sections were prepared. Cresyl violet (CV), H&E and Immuno-histochemical staining using anti-TH antibody was done. Motor behavior was assessed weekly throughout the experiment using five different methods. Rotenone treated parkinsonian animals showed deterioration of motor behavior, weight loss, loss of dopaminergic neurons and diminished immune-reactivity in the sections from the nigrostriatal regions of these animals Polydatin+rotenone treatment showed contradicting effects to parkinsonism, with amelioration in weight loss, neuro-motor behavior, dopaminergic loss and immune-reactivity against dopaminergic neurons. Present study revealed a neuro-protective potential of polydatin in animal model of PD by ameliorating the neuro-motor abnormalities and degeneration of dopaminergic neurons in nigrostriatal regions.


Entre los trastornos neurodegenerativos, la enfermedad de Parkinson (EP) se clasifica como la segunda más común. El sello patológico es la degeneración selectiva de las neuronas dopaminérgicas en las regiones nigro-estriatales del cerebro, con la aparición de los cuerpos de Lewy. El presente estudio explora el potencial de protección neuronal de la polidatina en términos de la mejora de la degeneración de las neuronas dopaminérgicas en las regiones nigro-estriatales del cerebro y el comportamiento neuromotor distorsionado en el modelo de rotenona de la enfermedad de Parkinson. Treinta y seis ratas macho Sprague Dawley se dividieron en tres grupos: Grupo A (control), Grupo B (tratado con rotenona) y Grupo C (tratamiento con rotenona + polidatina). La rotenona se administró por vía intraperitoneal (i.p.) a una dosis de 3 mg/kg/peso corporal, mientras que la polidatina se administró i.p. a una dosis de 50 mg/kg/ peso corporal durante cuatro semanas. Posteriormente, los animales fueron sacrificados. Se aislaron la substantia nigra (SN) y cuerpo estriado de los cerebros y se realizaron secciones de cinco micras de espesor. Se realizó una tinción de violeta de cresilo (CV), H&E y tinción inmunohistoquímica usando anticuerpo anti-TH. El comportamiento motriz se evaluó semanalmente durante todo el experimento utilizando cinco métodos diferentes. Los animales parkinsonianos tratados con rotenona mostraron deterioro del comportamiento motriz, pérdida de peso, pérdida de neuronas dopaminérgicas y disminución de la reactividad inmune en las secciones de las regiones nigroestriadas. El tratamiento con polidatina + rotenona mostró efectos contrarios al parkinsonismo, con mejoría en la pérdida de peso, en el comportamiento motor, en la pérdida dopaminérgica y en la reactividad inmune contra las neuronas dopaminérgicas. El presente estudio reveló un potencial de protección neuronal de la polidatina en el modelo animal de la EP al mejorar las anomalías neuro-motoras y la degeneración de las neuronas dopaminérgicas en las regiones nigroestriatales.


Subject(s)
Animals , Male , Rats , Parkinson Disease/drug therapy , Stilbenes/administration & dosage , Glucosides/administration & dosage , Parkinson Disease/pathology , Rotenone/toxicity , Immunohistochemistry , Dopamine , Rats, Sprague-Dawley , Neuroprotective Agents , Disease Models, Animal , Movement Disorders/prevention & control , Nerve Degeneration/prevention & control
10.
Electron. j. biotechnol ; 33: 11-16, May. 2018. ilus, tab, graf
Article in English | LILACS | ID: biblio-1022822

ABSTRACT

Background: The plant secondary metabolite pinosylvin is a polyphenol from the stilbene family, which have positive effects on human health. Biotechnological production is an attractive alternative for obtaining this stilbene. In Escherichia coli, malonyl-CoA is the precursor for both stilbene and fatty acid syntheses. In this study, with the aim of increasing pinosylvin production, we evaluated a novel approach that is based on reducing the expression of the gene fabI, which encodes the enzyme enoyl-acyl carrier protein reductase that is involved in fatty acid synthesis. Results: A recombineering method was employed to eliminate the chromosomal -35 promoter sequence and the upstream region of the gene fabI in E. coli strain W3110. Analysis, employing RT-qPCR, showed that such modification caused a 60% reduction in the fabI transcript level in the mutant strain W3110Δ-35fabI::Cm compared to the wild type W3110. Synthetic genes encoding a mutant version of 4-coumaroyl-CoA ligase from Streptomyces coelicolor A3 with improved catalytic activity employing cinnamic acid as substrate and a stilbene synthase from Vitis vinifera were cloned to generate the plasmid pTrc-Sc4CL(M)-VvSTS. The production performance of strains W3110Δ-35fabI::Cm/pTrc-Sc4CL(M)-VvSTS and W3110/pTrc-Sc4CL(M)- VvSTS was determined in shake flask cultures with Luria-Bertani medium supplemented with 10 g/L glycerol and 3 mM cinnamic acid. Under these conditions, the strain W3110Δ-35fabI::Cm/pTrc-Sc4CL(M)-VvSTS produced 52.67 mg/L pinosylvin, a level 1.5-fold higher than that observed with W3110/pTrc-Sc4CL(M)-VvSTS. Conclusion: A reduction in the transcript level of fabI caused by the elimination of the -35 and upstream promoter sequences is a successful strategy to improve pinosylvin production in E. coli.


Subject(s)
Stilbenes/metabolism , Escherichia coli/metabolism , Enoyl-(Acyl-Carrier-Protein) Reductase (NADH)/genetics , Biological Products , Coenzyme A Ligases , Fatty Acids , Metabolic Engineering
11.
Chinese Journal of Lung Cancer ; (12): 931-936, 2018.
Article in Chinese | WPRIM | ID: wpr-772340

ABSTRACT

Pterostilbene (3,5-dimethoxy-4'-hydroxystilbene) is a polyphenolic compound primarily found in blueberries, grapes, and a tree wood, pterocarpus marsupium. Studies demonstrate that pterostilbene inhibits a variety of cancers, such as lung, breast, stomach, colon, etc. The anti-cancer activities are related to the regulation of several hallmarks of cancer. Moreover, pterostilbene exhibits much greater bioavailability and bioactivity than resveratrol which warrants further investigation in the anti-cancer functions and mechanisms.
.


Subject(s)
Animals , Antineoplastic Agents, Phytogenic , Chemistry , Pharmacology , Humans , Neoplasms , Drug Therapy , Plant Extracts , Chemistry , Pharmacology , Stilbenes , Chemistry , Pharmacology
12.
Natural Product Sciences ; : 266-271, 2018.
Article in English | WPRIM | ID: wpr-741631

ABSTRACT

Five new prenylated stilbenes (1 – 5), along with the known compounds cudraflavone C, trans-4-isopentenyl-3,5,2′,4′-terahydroxystilbene, trans-4-(3-methyl-E-but-1-enyl)-3,5,2′,4′-tetrahydroxystilbene, pannokin G, cycloartobiloxanthone, artonin P, morusin, artocarpin, artonin E, kuwanon C, artobiloxanthone, and artoindonesianin C (6 – 17) were isolated from the stem bark of the tropical tree Artocarpus communis. The structures were established by NMR spectroscopic analysis, MS studies, and comparison with spectral data reported in the literature.


Subject(s)
Artocarpus , Moraceae , Stilbenes , Trees
13.
Braz. j. med. biol. res ; 51(4): e6867, 2018. graf
Article in English | LILACS | ID: biblio-889068

ABSTRACT

Polydatin, a small molecule from Polygonum cuspidatum, has many biological functions, particularly anti-cancer effects. However, the anti-cancer effects of polydatin in hepatocellular carcinoma (HCC) have not been examined yet. In the present study, MTT assay, BrdU assay, transwell invasion assay, and wound healing assay were performed to determine cell proliferation, invasion and migration. Flow cytometry and TUNEL assay were used to measure cell apoptosis. Quantitative real-time PCR and western blotting assays were used to determine mRNA and protein expression levels. Xenograft experiment was performed to determine the in vivo anti-tumor effect of polydatin. Immunostaining was performed to analyze the expression of caspase-3 and Ki-67. Our results showed that polydatin inhibited cell proliferation in a concentration-dependent and time-dependent manner in the HCC cell lines. Polydatin also induced cell apoptosis in a concentration-dependent manner possibly via increasing the caspase-3 activity, and up-regulating the protein expression of caspase-3, caspase-9, Bax, and down-regulating the protein expression of Bcl-2. In addition, polydatin treatment had an inhibitory effect on cell proliferation, invasion and migration in HCC cell lines. Polydatin treatment also suppressed the Wnt/beta-catenin signaling activities in HCC cells. Polydatin treatment significantly reduced tumor growth in nude mice inoculated with HepG2 cells, suppressed the expression of Ki-67, and increased caspase-3 expression and TUNEL activity. Our data indicated the important role of polydatin for the suppression of HCC progression.


Subject(s)
Animals , Male , Mice , Stilbenes/pharmacology , Cell Movement/drug effects , Apoptosis/drug effects , Carcinoma, Hepatocellular/drug therapy , Cell Proliferation/drug effects , Glucosides/pharmacology , Liver Neoplasms, Experimental/drug therapy , Drugs, Chinese Herbal , Blotting, Western , Carcinoma, Hepatocellular/pathology , Cell Line, Tumor , Real-Time Polymerase Chain Reaction , Flow Cytometry , Liver Neoplasms, Experimental/pathology , Mice, Inbred BALB C , Mice, Nude , Neoplasm Invasiveness
14.
Article in English | WPRIM | ID: wpr-715288

ABSTRACT

The aim of the current study was to demonstrate the potential therapeutic efficacy of resveratrol in oral cancer patients. Lysophosphatidic acid (LPA) intensifies cancer cell invasion and metastasis, whereas resveratrol, a natural polyphenolic compound, possesses antitumor activity, suppressing cell proliferation and progression in various cancer cell lines (ovarian, gastric, oral, pancreatic, colon, and prostate cancer cells). In addition, resveratrol has been identified as an inhibitor of LPA-induced proteolytic enzyme expression and ovarian cancer invasion. Furthermore, resveratrol was shown to inhibit oral cancer cell invasion by downregulating hypoxia-inducible factor 1α and vascular endothelial growth factor expression. Recently, we demonstrated that LPA is important for the expression of transcription factors TWIST and SLUG during epithelial-mesenchymal transition (EMT) in oral squamous carcinoma cells. In this study, we treated serum-starved cultures of oral squamous carcinoma cell line YD-10B with resveratrol for 24 hours prior to stimulation with LPA. To identify an optimal resveratrol concentration that does not induce apoptosis in oral squamous carcinoma cells, we determined the toxicity of resveratrol in YD-10B cells by assessing their viability using the MTT assay. Another assay was performed using Matrigel-coated cell culture inserts to detect oral cancer cell invasion activity. Immunoblotting was applied for analyzing protein expression of SLUG, TWIST1, E-cadherin, and GAPDH. We demonstrated that resveratrol efficiently inhibited LPA-induced oral cancer cell EMT and invasion by downregulating SLUG and TWIST1 expression. Therefore, resveratrol may potentially reduce oral squamous carcinoma cell invasion and metastasis in oral cancer patients, improving their survival outcomes. In summary, we identified new targets for the development of therapies against oral cancer progression and characterized the therapeutic potential of resveratrol for the treatment of oral cancer patients.


Subject(s)
Apoptosis , Cadherins , Carcinoma, Squamous Cell , Cell Culture Techniques , Cell Line , Cell Proliferation , Colon , Epithelial-Mesenchymal Transition , Gastropoda , Humans , Immunoblotting , Lysophospholipids , Mouth Neoplasms , Neoplasm Metastasis , Ovarian Neoplasms , Prostatic Neoplasms , Stilbenes , Transcription Factors , Vascular Endothelial Growth Factor A
15.
Int. j. morphol ; 35(4): 1342-1347, Dec. 2017. tab, graf
Article in English | LILACS | ID: biblio-893139

ABSTRACT

SUMMARY: Morphine is one of the naturally occurring phenanthrene alkaloids of opium that induces adverse effects on male reproductive system. Resveratrol is a phytoestrogen and antioxidant of red grape. The main goal is to investigate whether resveratrol could inhibit adverse effects of morphine on sperm cell viability, count, motility as well as testis histology, testosterone hormone and nitric oxide levels in mice. In the present study, 48 male rats were randomly divided into 8 groups (n=6) and were treated intraperitoneally for 14 days with normal saline, resveratrol (2, 8, 20 mg/kg/day), morphine (20 mg/kg/day) and morphine (20 mg/kg/day) + resveratrol (2, 8, 20 mg/kg/day). At the end of experiments, sperm parameters (sperm cell viability, count, motility and morphology), testis weight, the diameter of seminiferous tubules, testosterone hormone level and nitric oxide were analyzed. The data were analyzed by SPSS software for windows (version 20) using one-way ANOVA test followed by Tukey's post hoc test, and P<0.05 was considered significant. The results indicated that morphine administration significantly decreased testosterone level, count, viability and motility of sperm cells and testis weight and increased nitric oxide compared to the saline group (P=0.000). Administration of resveratrol and resveratrol plus morphine significantly increased motility, count and viability of sperm cells, somniferous tubule diameter and testosterone, while it decreased nitric oxide level compared to morphine group (P=0.025). It seems that resveratrol administration could increase the quality of spermatozoa and prevented morphine-induced adverse effects on sperm parameters.


RESUMEN: La morfina es uno de los alcaloides fenantreno del opio que induce efectos adversos en el sistema reproductivo masculino. El resveratrol es un fitoestrógeno y antioxidante de la uva roja. El objetivo principal de este trabajo fue investigar si el resveratrol puede inhibir los efectos adversos de la morfina sobre la viabilidad celular de los espermatozoides, el recuento y la motilidad, así como la histología de los testículos, la hormona testosterona y los niveles de óxido nítrico en ratones. Se dividieron, aleatoriamente, 48 ratas machos en 8 grupos (n = 6) y se trataron de forma intraperitoneal durante 14 días con solución salina normal, resveratrol (2, 8, 20 mg / kg / día), morfina (20 mg / kg / día ) y morfina (20 mg / kg / día) + resveratrol (2, 8, 20 mg / kg / día). Al final de los experimentos, se analizaron los parámetros espermáticos (viabilidad celular, recuento, motilidad y morfología), el peso de los testículos, el diámetro de los túbulos seminíferos, el nivel de la hormona testosterona y el óxido nítrico. Los datos fueron analizados con el software de SPSS para Windows (versión 20) usando una prueba de ANOVA de una vía seguida de la prueba post hoc de Tukey, y P <0,05 se consideró significativo. Los resultados indicaron que la administración de morfina disminuyó significativamente el nivel de testosterona, el recuento, la viabilidad y la motilidad de los espermatozoides y el peso de los testículos, además del aumento de óxido nítrico en comparación con el grupo salino (p = 0,000). La administración de resveratrol y resveratrol más morfina aumentó significativamente la motilidad, el recuento y la viabilidad de los espermatozoides, el diámetro de los túbulos seminíferos y la testosterona, mientras que disminuyó el nivel de óxido nítrico comparado con el grupo morfina (p = 0,025). En conclusión, la administración de resveratrol podría aumentar la calidad de los espermatozoides y prevenir los efectos adversos inducidos por la morfina sobre los parámetros espermáticos.


Subject(s)
Animals , Male , Rats , Stilbenes/administration & dosage , Genitalia, Male/drug effects , Morphine/toxicity , Sperm Motility , Spermatogenesis/drug effects , Testis/drug effects , Testosterone/blood , Nitric Oxide/blood
16.
Int. j. morphol ; 35(4): 1409-1415, Dec. 2017. graf
Article in English | LILACS | ID: biblio-893150

ABSTRACT

SUMMARY: Morphine produces free radicals and cause apoptosis in some cell. Resveratrol (RSV) is a stilbenoid, a type of natural phenol, and a phytoalexin produced by several plants in response to injury. 48 male mice were randomly assigned to 8 groups. In this study, various doses of RSV (2, 8 and 20 mg/kg) and RSV plus Morphine (2, 8 and 20 mg/kg) were administered intraperitoneally to male mice for 20 consequent days and weight of kidneys, biochemical characteristics, morphometric markers and blood serum nitric oxide level were studied. The results indicated that morphine administration significantly increased the mean diameter of glomerulus and distal and proximal convoluted tubule, Lactate dehydrogenase (LDH), Blood urea nitrogen (BUN), creatinine and nitric oxide levels compared to the saline group (P<0.05). However, RSV and RSV plus morphine in all doses significantly decreased glomeruli number and LDH, BUN, creatinine and nitric oxide levels compared to morphine groups (p<0.05). Thus, it seems that resveratrol improved kidney damages induced by morphine in mice.


RESUMEN: La morfina produce radicales libres y causa apoptosis en algunas células. El resveratrol (RSV) es un tipo de fenol natural y una fitoalexina producida por varias plantas en respuesta a una lesión. Se asignaron al azar 48 ratones machos a 8 grupos. En este estudio se administraron varias dosis de RSV (2, 8 y 20 mg/kg) y RSV más morfina (2, 8 y 20 mg/kg) intraperitoneal en ratones machos durante 20 días consecutivos y se estudió el peso de los riñones, las características bioquímicas, los marcadores morfométricos y el nivel de óxido nítrico en suero sanguíneo. Los resultados indicaron que la administración de morfina aumentó significativamente el diámetro medio del glomérulo y de los túbulos distal y proximal, los niveles de lactato deshidrogenasa (LDH), nitrógeno ureico en sangre (BUN), la creatinina y el óxido nítrico en comparación con el grupo salino (p <0,05). Sin embargo, el RSV y el RSV más morfina en todas las dosis redujeron significativamente el número de glomérulos y LDH, BUN, la creatinina y el óxido nítrico en comparación con los grupos de morfina (p <0,05). Por lo tanto, los resultados podrían indicar que el resveratrol mejoró el daño renal inducido por la morfina en ratones.


Subject(s)
Animals , Male , Mice , Stilbenes/administration & dosage , Kidney/drug effects , Morphine/toxicity , Creatinine/blood , Kidney Glomerulus/drug effects , Mice, Inbred BALB C , Nitric Oxide/blood
17.
Acta cir. bras ; 32(3): 194-202, Mar. 2017. tab, graf
Article in English | LILACS | ID: biblio-837694

ABSTRACT

Abstract Purpose: To investigate the effects of lycopene and resveratrol pretreatment on hepatic hyperplasia in partially hepatectomized rats. Methods: The lycopene group and the resveratrol group received 40 mg/kg/day of lycopene or resveratrol, respectively (dissolved in olive oil or in saline solution, respectively) and administered via a gastric tube for 30 days. The partially hepatectomzed (PH) control groups received saline or olive oil via a gastric tube for 30 days, respectively, and the normal control group received no treatment. Liver tissue and intracardiac blood samples were obtained 24, 36 or 48 h after PH. Results: No areas of fibrosis were detected. No significant changes in mitotic index, in the number of apoptosis events or in aspartate aminotransferase and alanine aminotransferase levels were observed. Conclusions: Lycopene and resveratrol pretreatment did not interfere on hepatic hyperplasia in partially hepatectomized rats.


Subject(s)
Animals , Male , Stilbenes/pharmacology , Carotenoids/pharmacology , Hepatectomy/methods , Liver/surgery , Liver/drug effects , Antioxidants/pharmacology , Aspartate Aminotransferases/blood , Time Factors , Reproducibility of Results , Treatment Outcome , Rats, Wistar , Apoptosis/drug effects , Oxidative Stress/drug effects , Alanine Transaminase/blood , Liver/enzymology , Liver/pathology , Liver Regeneration/drug effects , Mitotic Index
18.
Arq. bras. cardiol ; 108(2): 116-121, Feb. 2017. tab, graf
Article in English | LILACS | ID: biblio-838695

ABSTRACT

Abstract Background: Despite knowing that resveratrol has effects on blood vessels, blood pressure and that phytostrogens can also improve the endothelium-dependent relaxation/vasodilation, there are no reports of reveratrol's direct effect on the endothelial function and blood pressure of animals with estrogen deficit (mimicking post-menopausal increased blood pressure). Objective: To verify the effect of two different periods of preventive treatment with resveratrol on blood pressure and endothelial function in ovariectomized young adult rats. Methods: 3-month old female Wistar rats were used and distributed in 6 groups: intact groups with 60 or 90 days, ovariectomized groups with 60 or 90 days, and ovariectomized treated with resveratrol (10 mg/kg of body weight per day) for 60 or 90 days. The number of days in each group corresponds to the duration of the experimental period. Vascular reactivity study was performed in abdominal aortic rings, systolic blood pressure was measured and serum nitric oxide (NO) concentration was quantified. Results: Ovariectomy induced blood pressure increase 60 and 90 days after surgery, whereas the endothelial function decreased only 90 days after surgery, with no difference in NO concentration among the groups. Only longer treatment (90 days) with resveratrol was able to improve the endothelial function and normalize blood pressure. Conclusion: Our results suggest that 90 days of treatment with resveratrol is able to improve the endothelial function and decrease blood pressure in ovariectomized rats.


Resumo Fundamentos: Apesar de se saber que o resveratrol apresenta efeitos sobre a pressão arterial e os vasos sanguíneos, e que os fitoestrógenos podem melhorar o relaxamento/vasodilatação dependente do endotélio, não há relatos do efeito direto do resveratrol sobre a pressão arterial e a função endotelial em animais com deficiência de estrógeno (mimetizando a pressão arterial aumentada pós-menopausa). Objetivo: Verificar o efeito de dois diferentes períodos de tratamento preventivo com resveratrol sobre a pressão arterial e a função endotelial em ratas adultas jovens ovariectomizadas. Métodos: Foram utilizadas ratas Wistar com 3 meses de idade, distribuídas em 6 grupos: grupos intactas com 60 ou 90 dias, grupos ovariectomizadas com 60 ou 90 dias, grupos ovariectomizadas e tratadas com resveratrol na dose de 10mg/kg de massa corporal por dia, durante 60 ou 90 dias, sendo o número de dias em cada grupo relativo à duração do período experimental. Foi realizado um estudo de reatividade vascular em anéis da aorta abdominal, mensurada a pressão arterial sistólica e quantificada a concentração sérica de óxido nítrico (NO). Resultados: A ovariectomia induziu aumento da pressão arterial 60 e 90 dias após a cirurgia, enquanto a função endotelial decaiu apenas após 90 dias, e não houve diferença na concentração de NO entre os grupos. Apenas o tratamento prolongado com resveratrol (90 dias) foi capaz de melhorar a função endotelial e normalizar a pressão arterial. Conclusão: Nossos resultados sugerem que o tratamento por 90 dias com resveratrol é capaz de melhorar a função endotelial e diminuir a pressão sanguínea em ratas ovariectomizadas.


Subject(s)
Animals , Female , Stilbenes/pharmacology , Blood Pressure/drug effects , Endothelium, Vascular/drug effects , Ovariectomy , Antioxidants/pharmacology , Reference Values , Stilbenes/therapeutic use , Time Factors , Blood Pressure/physiology , Endothelium, Vascular/physiology , Reproducibility of Results , Treatment Outcome , Rats, Wistar , Estrogens/deficiency , Resveratrol , Hypertension/metabolism , Hypertension/drug therapy , Nitrates/blood , Nitric Oxide/blood , Antioxidants/therapeutic use
19.
Electron. j. biotechnol ; 25: 43-49, ene. 2017. ilus, tab, graf
Article in English | LILACS | ID: biblio-1008576

ABSTRACT

Background: Gnetum parvifolium stems and roots have been used for a long time in traditional Chinese medicines. Stilbenes are bioactive compounds present in G. parvifolium plants, and they possess antioxidative and anticancer properties. However, little is known about the responses of G. parvifolium stilbene biosynthetic pathways to stress conditions. Therefore, we investigated stilbene biosynthesis, including the expression of relevant genes, in G. parvifolium exposed to high-temperature and ultraviolet-C treatments. Results: High temperatures did not influence the accumulation of total stilbenes in stems but decreased stilbene concentrations in roots at 3 h, with a subsequent restoration to control levels. In contrast, ultraviolet irradiation induced the accumulation of total stilbenes in stems but not in roots. We also observed that high temperatures inhibited the production of resveratrol and piceatannol in G. parvifolium stems and roots, whereas ultraviolet treatments initially inhibited their accumulation (up to 6 h) but induced their production at later time points. Analyses of specific genes (i.e., PAL, C4H, 4CL, STS, and CYP) revealed that their expression levels generally increased in stress-treated stems and roots, although there was some variability in the expression profiles during treatments. Conclusions: Our results indicated that high temperatures and ultraviolet irradiation differentially affect the biosynthesis of specific stilbenes in G. parvifolium stems and roots. Therefore, cultivating G. parvifolium seedlings under optimal stress conditions may increase the biosynthesis of specific stilbene compounds.


Subject(s)
Stilbenes/analysis , Gnetum/metabolism , Stilbenes/radiation effects , Stilbenes/metabolism , Ultraviolet Rays , Reverse Transcriptase Polymerase Chain Reaction , Gnetum/radiation effects , Gnetum/genetics , Seedlings , Polyphenols/analysis , Polyphenols/radiation effects , Polyphenols/metabolism , Hot Temperature
20.
Article in Chinese | WPRIM | ID: wpr-351392

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the host-defense role of short palate, lung, and nasal epithelium clone 1 (SPLUNC1) in Streptococcus pneumoniae (SP) infection and the effect of resveratrol (Res) on SPLUNC1 expression, and to provide new thoughts for the treatment of diseases caused by SP infection.</p><p><b>METHODS</b>According to the multiplicity of infection (MOI), BEAS-2B cells with SP infection were divided into control group, MOI20 SP group, and MOI50 SP group. According to the different concentrations of Res, the BEAS-2B cells with MOI20 SP infection pretreated by Res were divided into 12.5Res+SP group, 25Res+SP group, and 50Res+SP group (the final concentrations of Res were 12.5, 25, and 50 μmol/L, respectively). Cell Counting Kit-8 was used to measure cell activity and determine the optimal concentration and action time of SP and Res. In the formal experiment, the cells were divided into control group, Res group, SP group, and Res+SP group. Real-time PCR and ELISA were used to measure the mRNA and protein expression of SPLUNC1.</p><p><b>RESULTS</b>Over the time of SP infection, cell activity tended to decrease. Compared with the control group and the MOI20 SP group, the MOI50 SP group had a reduction in cell activity. Compared with the MOI20 SP group, the 25Res+SP group had increased cell activity and the 50Res+SP group had reduced cell activity (P<0.05). MOI20 SP bacterial suspension and 25 μmol/L Res were used for the formal experiment. Over the time of SP infection, the mRNA expression of SPLUNC1 in BEAS-2B cells firstly increased and then decreased in the SP group and the Res+SP group (P<0.05). Compared with the SP group, the Res+SP group had significant increases in the mRNA and protein expression of SPLUNC1 at all time points (P<0.05). Compared with the control group, the Res group had no significant changes in the mRNA and protein expression of SPLUNC1 (P>0.05).</p><p><b>CONCLUSIONS</b>SP infection can induce SPLUNC1 expression and the host-defense role of SPLUNC1. Res can upregulate SPLUNC1 expression during the development of infection and enhance cell protection in a concentration- and time-dependent manner.</p>


Subject(s)
Bronchi , Metabolism , Cells, Cultured , Cytoprotection , Epithelial Cells , Metabolism , Glycoproteins , Genetics , Physiology , Humans , Phosphoproteins , Genetics , Physiology , RNA, Messenger , Stilbenes , Pharmacology , Streptococcus pneumoniae , Virulence
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