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In vitro antileishmanial effects of Physalis angulata root extract on Leishmania infantum

Journal of Integrative Medicine 2018年第6期16卷 404-410页

作者： Bruno Jose Martins da silva Sandro Wilson Gomes pereira Ana Paula Drummond Rodrigues Jose Luiz Martins Do Nascimento Edilene Oliveira silva Laboratory of Structural Biology Institute of Biological SciencesFederal University of PardBelemPard 66075-110Brazil National Institute of Science and Technology in Structural Biology and Bioimaging(INCT-INBEB) Rio de Janeiro 21941-901Brazil Laboratory of Electron Microscopy Department of Health SurveillanceMinistry of HealthEvandro Chagas InstituteBelemPard 66087-082Brazil Laboratory of Molecular and Cellular Neurochemistry Institute of Biological SciencesFederal University of PardBelemPard 66075-110Brazil National Institute of Science and Technology in Neuroimmunomodulation(INCT-NIM) Rio de Janeiro 21040-360Brazil

Objective： In the present study, we evaluated the effects of the aqueous extract of Physalis angulata root （AEPa） on Leishmania infanturn proliferation, morphology, and the driving mechanism in leishmanicidal activity and modulatory action on macrophages. Methods： I., infantum promastigotes were treated with 50 and 100 μg/mL AEPa for 72 h and then antipro- mastigote assay was performed by counts in a Newbauer chamber, morphological changes were analyzed by transmission electron microscopy and the mechanism of the leishmanicidal activity was detected. In addition, macrophages were infected with L. infantum and were used to evaluate anti-amastigote activity of AEPa and effects of AEPa on cytokine secretion after 72-hour treatment. Results： Treatment with AEPa reduced the numbers ofL infantum promastigotes （50% inhibitory concen- tration （ICso） = 65.9μg/mL; selectivity index （SI）= 22.1） and amastigotes （ICso = 37.9 μg/mL; SI = 38.5） compared with the untreated control. Amphotericin B reduced 100% of the promastigote numbers after 72 h of treatment （IC50 = 0.2μg/mL）. AEPa induced several morphological changes and increased the production of reactive oxygen species and apoptotic death in promastigotes after treating for 72 h. AEPa （100 μg/mL） promoted tumor necrosis factor-α secretion in macrophages infected with L. infantum after 72 h of treatment, but did not induce an increase in this cytokine in noninfected macrophages. In addition, AEPa showed no cytotoxic effect on J774-A1 cells （50% cytotoxic concentration 〉1000μg/mL）. Conclusion： AEPa presented antileishmanial activity against the promastigotes and amastigotes of I.. infantum without macrophage cytotoxicity; these results show that natural products such as P. angulata have leishmanicidal potential and in the future may be an alternative treatment for leishmaniasis.

关键词： Leishmanicidal activity Leishmania infantum Reactive oxygen species Apoptosis Physalis angulata

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Antiglycation and antioxidant activities of the crude extract and saponin fraction of Tribulus terrestris before and after microcapsule release

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Journal of Integrative Medicine 2022年第2期20卷 153-162页

作者： Célia Cristina Malaguti Figueiredo Amanda da Costa Gomes Filipe Oliveira Granero Joao Luiz Bronzel Junior Luciana pereira silva Valdecir Farias Ximenes Regildo Márcio Goncalves da silva Institute of Chemistry São Paulo State UniversityAraraquaraSão Paulo 14800-060Brazil Educational Foundation of the City of Assis AssisSão Paulo 19807-130Brazil Department of Chemistry School of SciencesSão Paulo State UniversityBauruSão Paulo 17033-360Brazil Department of Biotechnology School of SciencesHumanities and LanguagesSão Paulo State UniversityAssisSão Paulo 19806-900Brazil

Objective:The present study investigated antiglycation and antioxidant activities of crude dry extract and saponin fraction of Tribulus *** also developed a method of microencapsulation and evaluated antiglycation and antioxidant activities of crude dry extract and saponin fraction before and after microcapsule ***:Antiglycation activity was determined by relative electrophoretic mobility(REM),free amino groups and inhibition of advanced glycation end-product(AGE)*** activity was determined by 2,2-diphenyl-1-picrylhydrazyl(DPPH),ferric ion-reducing antioxidant power(FRAP),nitric oxide(NO)and thiobarbituric acid reactive species(TBARS)*** were prepared using maltodextrin as wall material and freeze-drying as encapsulation *** characterization of microcapsules was evaluated by scanning electron microscopy,and encapsulation efficiency and microcapsule release were determined by total saponins *** and antioxidant assays were performed using crude dry extract and saponin fraction of *** before and after ***:Saponin fraction showed an increase of 32.8%total ***-performance liquid chromatography-mass spectrometry analysis showed the presence of saponins in the obtained *** evaluation by REM demonstrated that samples before and after release presented antiglycation activity similar to bovine serum albumin treated with ***,samples inhibited AGE formation,highlighting treatment with saponin fraction after release(89.89%).Antioxidant tests demonstrated antioxidant activity of the *** dry extract before encapsulation presented the highest activities in DPPH(92.00%)and TBARS(32.49%)*** fraction before encapsulation in FRAP test(499μmol Trolox equivalent per gram of dry sample)and NO test(15.13μmol nitrite formed per gram of extract)presented the highest ***:This study presen

关键词： Glycation Microencapsulation Oxidative stress Saponins Tribulus terrestris

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Antidiabetic effects of galactomannans from Adenanthera pavonina *** streptozotocin-induced diabetic mice

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Asian Pacific Journal of Tropical Medicine 2018年第2期11卷 116-122页

作者： Icaro Gusmao Pinto Vieira Francisca Noelia pereira Mendes Sabrina Cesar da silva Raquel Teixeira Terceiro Paim Bruno Bezerra da silva Stephen Rathinaraj Benjamin Eridan Orlando pereira Tramontina Florean Maria Izabel Florindo Guedes Technological Development Park(PADETEC) Federal University of CearaPici Campus60455-970FortalezaCearaBrazil Department of Health and Nutrition State University of CearaAv.Dr.Silas Munguba 1700Itaper campus60714-903ForalezaCearaBrazil

Objective: To evaluate the antidiabetic effect of galactomannans extracted from Adenanthera pavonina's ***(GAP) in streptozotocin(STZ) induced diabetic ***:The preliminary galactomannan yield from Adenanthera pavonina *** and extraction products composition were *** chemical characterization methods like thin layer chromatography, Fourier transform infrared spectroscopy, ~1H and ^(13)C nuclear magnetic resonance, and molecular weight by gel permeation chromatography have been employed to characterize the extracted *** mice were divided in four groups: Normal control, diabetic control, GAP(1% and 2%) treated and standard drug treated *** mice received treatment daily for 30 *** was induced by STZ at a single dose of 120 mg/*** weight, water and food intake, fasting blood glucose, total cholesterol and triglycerides were *** analysis of pancreas and liver were performed to evaluate STZ-induced tissue ***: The isolated and extracted galactomannan from Adenanthera pavonina was confirmed by various chemical characterization *** exhibited a 1.46:1 mannose: galactose ratio, and high molar *** GAP enriched food decreased glycaemia, total cholesterol and *** didn't interfere on food intakes or body weight, although it increased water ***, the relative liver weight indicated toxic galactomannan effects on the histopathological changes of the pancreas in STZ induced ***: It is concluded that GAP is a natural product that contains potent galactomannan and is useful in preventing and treating diabetes.

关键词： Adenanthera pavonina Galactomannans Diabetes Glycaemia Total cholesterol Triacylglycerol

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Indirect printing of hierarchical patient-specific scaffolds for meniscus tissue engineering

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Bio-Design and Manufacturing 2019年第4期2卷 225-241页

作者： Joao BCosta Joana silva-Correia Sandra Pina Alain da silva Morais Sílvia Vieira Hélder pereira Joao Espregueira-Mendes Rui LReis Joaquim M.Oliveira B′s Research Group I3Bs-Research Institute on BiomaterialsBiodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineAveParkZona Industrial da Gandra4805-017 Barco GmrPortugal ICVS/3B’s-PT Government Associate Laboratory Braga/GuimaraesPortugal The Discoveries Centre for Regenerative and Precision Medicine Headquarters at University of MinhoAvepark4805-017 BarcoGuimar'sPortugal Ripoll y De Prado Sports Clinic:Murcia-Madrid FIFA Medical Centre of Excellence MurciaSpain Orthopedic Department Centro Hospitalar Póvoa de Varzim Vila do CondePortugal Clínica do Dragao Espregueira-Mendes Sports CentreFIFA Medical Centre of ExcellencePortoPortugal Dom Henrique Research Centre PortoPortugal Orthopedic Department University of MinhoBragaPortugal

The complex meniscus tissue plays a critical role in the knee. The high susceptibility to injury has led to an intense pursuit for better tissue engineering regenerative strategies, where scaffolds play a major role. In this study, indirect printed hierarchical multilayered sca ffolds composed by a silk fibroin (SF) upper layer and an 80/20 (w/w) ratio of SF/ionic-doped β-tricalcium phosphate (TCP) bottom layer were developed. Furthermore, a comparative analysis between two types of sca ffolds pro- duced using di fferent SF concentrations, i.e., 8% (w/v) (Hi8) and 16% (w/v) (Hi16) was performed. In terms of architecture and morphology, the produced sca ffolds presented homogeneous porosity in both layers and no di fferences were observed when comparing both sca ffolds. A decrease in terms of mechanical performance of the sca ffolds was observed when SF concentration decreased from 16 to 8% (w/v). Hi16 revealed a static compressive modulus of 0.66 ± 0.05 MPa and dynamical mechanical properties ranging from 2.17 ± 0.25 to 3.19 ± 0.38 MPa. By its turn, Hi8 presented a compressive modulus of 0.27 ± 0.08 MPa and dynamical mechanical properties ranging from 1.03 ± 0.08 MPa to 1.56 ± 0.13 MPa. In vitro bioactivity studies showed formation of apatite crystals onto the surface of Hi8 and Hi16 bottom layers. Human meniscus cells (hMCs) and human primary osteoblasts were cultured separately onto the top layer (SF8 and SF16) and bottom layer (SF8/TCP and SF16/TCP) of the hierarchical sca ffolds Hi8 and Hi16, respectively. Both cell types showed good adhesion and proliferation as denoted by the live/dead staining, Alamar Blue assay and DNA quanti fication analysis. Subcutaneous implantation in mice revealed weak in flammation and sca ffold’s integrity. The hierarchical indirect printed SF sca ffolds can be promising candidate for meniscus TE sca ffolding applications due their suitable mechanical properties, good biological performance and possibility of being applied in a patie

关键词： Patient-specific Indirect printing Hierarchical Silk fibroin Enzymatic-cross-linking Meniscus

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Soil texture prediction through stratification of a regional soil spectral library

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Pedosphere 2022年第2期32卷 294-306页

作者： José Janderson Ferreira COSTA élvio GIASSON Elisangela Benedet da silva Tales TIECHER Antonny Francisco Sampaio DE SENA Ryshardson Geovane pereira de Oliveira E silva Department of Soil Science Faculty of AgronomyUniversity of Rio Grande do SulBento Gonçalves Avenue 7712Porto Alegre 91540-000Brazil Agricultural Research and Rural Extension Corporation of Santa Catarina Rodovia Admar Gonzaga 1347FlorianópolisSanta Catarina 88034-901Brazil

Knowing the spatial distribution of soil texture,which is a physical property,is essential to support agricultural and environmental decision *** texture can be estimated using visible,near infrared,and shortwave infrared(Vis-NIR-SWIR)***,the performance of spectroscopic models is variable because of soil ***,few studies address the effects of soil sample variability on the performance of the models,especially for larger spectral libraries that include soils that are more ***,the objectives of this study were to:i)apply Vis-based color parameters on the stratification of a regional soil spectral library;ii)evaluate the performance of the predictive models generated from the spectral library stratification;iii)compare the performance of stratified models(SMs)and the model without stratification(WSM),and iv)explain possible changes in prediction accuracy based on the ***,a regional soil spectral library with 1535 samples from the State of Santa Catarina,Brazil was *** reflectance data were obtained by Vis-NIR-SWIR spectroscopy in the laboratory using a spectroradiometer covering the 350–2500 nm spectral ***,silt,and clay fractions were determined using the pipette ***-two components of color parameters were derived from the Vis spectrum using the colorimetric models.A cubist regression algorithm was used to assess the accuracy of the applicability of the initial models(SMs and WSM)and of the validation between the *** order derivatives(FODs)at 0.5,1.5,and 2 intervals were used to explain possible changes in the performance of the *** SMs with higher contents of clay and iron oxides obtained the highest accuracy,and the most important spectral bands were identified,mainly in the 480–550 and 850–900 nm ranges and the 1400,1900,and 2200 nm ***,stratification of soil spectral libraries is a good strategy to improve regional assessments of soil resou

关键词： color parameters cubist regression fractional order derivatives soil spectroscopy spectroscopic model stratified model Vis-NIR-SWIR

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Experimental investigation on variability in properties of Amazonian wood species Muiracatiara ( Astronium lecointei ) and Maçaranduba ( Manilkara huberi ) focusing guitar fingerboards manufacturing

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Journal of Bioresources and Bioproducts 2021年第1期6卷 33-38页

作者： Roseli Felix da silva Ribeiro JoséFlávio Silveira Feiteira Jayme pereira de Gouvê Alexandre Furtado Ferreira Federal Fluminense University PPGEMVolta RedondaRJBrazil Federal Fluminense University PGMECVolta RedondaRJBrazil

In face of scarcity in the supply of non-traditional Brazilian woods properly treated for use in high quality musical instruments,pieces of Amazonian wood species muiracatiara(Astronium lecointei)and maçaranduba(Manilkara huberi)purchased in the common internal Brazilian timber market were *** species were pre-selected for use in fingerboards of acoustic and electric guitars due to similar properties with ebony(Diospyros crassiflora).Variabilities of elastic modulus parallel to grain and density were investigated inside wooden *** addition,referred parameters were used in calculation of speed of *** tests were performed in order to compare both species and revealed inequality for variances of dynamic elastic modulus(E_(d))and speed of sound,but equality for *** of means was also examined via unequal variance *** color differences,lower variability of *** led to the indication of this species as likely capable to substitute satisfactorily ebony in fingerboards manufacturing.

关键词： Mechanical properties variability Wood grain slope Experimental analysis Impulse excitation technique F-test

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Synthesis, crystal structure, magnetic properties and second harmonic generation of a new noncentrosymmetric coordination compound：Triaqua(4-amino-6-methoxypyrimidine) cuprate(Ⅱ)sulfate

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Chinese Chemical Letters 2016年第6期27卷 896-900页

作者： Mahjouba Ben Nasr Kamel Kaabi Matthias Zeller Wataru Fujita Pedro Sidónio pereira da silva Cherif Ben Nasr Laboratoire de Chimie des Materiaux Universite de Carthage Facultedes Sciences de Bizerte 7021 Zarzouna Tunisia Department of Chemistry Youngstown State University One University Plaza Youngstown OH 44555-3663 USA Graduate School of Natural Science Nagoya City University Yamanohata Mizuho-cho Mizuho-ku Nagoya 467-8501 Japan CFisUC Department of Physics University of Coimbra 3004-516 Coimbra Portugal

The chemical preparation, crystal structure and infrared spectroscopic characterization of the triaqua（4-amino-6-methoxypyrimidine） cuprate（II） sulfate, [Cu（C5H7N3）（H2O）3]SO4, is reported. The compound crystallizes in the noncentrosymmetric orthorhombic space group P212121 with lattice parameters a = 7.9025（3）, b = 11.1189（4）, c = 12.9720（4） , V = 1139.81（7） ~3 and Z = 4. The Cu（II） cation is fivecoordinated, in an early half-way between square pyramidal and trigonal bipyramidal fashion, by two nitrogen atoms of the 4-amino-6-methoxypyrimidine ligand and three water oxygen atoms. In the atomic arrangement, the organic ligands and the 5-connected Cu centers are linked with each other to give a 1-D corrugated hybrid chain running along the b-axis direction. The chains are interconnected by the SO4^（2-） anions via O–H...O, O–H...S, C–H...O and N–H...O hydrogen bonds to form layers spreading parallel to the（011） plane. The vibrational absorption bands were identified by infrared spectroscopy. Quantitative measurements of the second harmonic generation（SHG） of a powdered sample at 1064 nm were performed and a relative efficiency of 5.2 times the KDP standard was observed. Magnetic properties were also defined to characterize the complex. Magnetic measurements revealed that this material had a onedimensional antiferromagnetic character. The magnetic parameters were g = 2.11 and 2J/k B = -36 K.

关键词： Square pyramid Cu(II) complex X-ray diffraction Magnetic properties Second harmonic generation

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Production of bio-fertilizer from Ascophyllum nodosum and Sargassum muticum (Phaeophyceae)

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Journal of Oceanology and Limnology 2019年第3期37卷 918-927页

作者： silva Luís daniel BAHCEVANDZIEV Kiril pereira Leonel Faculty of Science and Technology University of CoimbraCoimbra 3000-456Portugal Polytechnic Institute of Coimbra Agricultural CollegeⅡA-Institute of Applied ResearchCERNAS-Research Centre for Natural ResourcesEnvironmentand SocietyBencantaCoimbra 3045-601Portugal Faculty of Science and Technology University of CoimbraCoimbra 3000-548Portugal

Oceans and seas form a large body of water that contains a natural *** humans,represents a resource,which makes this a point of interest,from researches to improve the *** produce many compounds and secondary metabolites that can be used in different fi elds of industry such as food,agricultural,pharmaceutical and *** though seaweeds are ancestral resources,recently it was notorious a global interest in knowing more about its potentials,where biotechnology plays an important role in *** showed that seaweed has many bioactive compounds benefi cial to plant development,giving them a great potential as an agricultural *** seaweeds to the soil provides organic matter,minerals,trace elements,growth plant regulator,metabolites,vitamins,and amino acids and it can work as a soil *** Portugal,the use of seaweeds for agriculture is important since long time *** the past,populations that lived near coastal zone depended on the seaweeds as a family subsistence but,throughout the years,synthetic fertilizers replaced *** work aimed to assess the potential of the extracts obtained from Ascophyllum nodosum and from Sargassum muticum as an agricultural *** evaluation was carried out with rice plants(Oryza sativa)and lettuce(Lactuca sativa),in germination bioassays,the culture of rice and lettuce plants in pots,and culture of lettuce plants in *** that,seaweed liquid extracts were used in different concentrations in different *** show that extracts obtained from two seaweeds,*** and ***,can be promissory plant biofertilizer at a concentration of 25% and had a positive effect on seed germination,plant development,and production.

关键词： fertilizer bioactive compounds Ascophyllum nodosum Sargassum muticum Oryza sativa Lactuca sativa

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Diet as an epigenetic factor in inflammatory bowel disease

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World Journal of Gastroenterology 2023年第41期29卷 5618-5629页

作者： Karina Marangoni Gilson Dorneles daniella Miranda da silva Letícia pereira Pinto Carina Rossoni Sabrina Alves Fernandes Egas Moniz School of Health and Science Caparica-AlmadaPortugalCaparica 2820-062Portugal National Institute of Sciences and Technology-Theranostics and Nanobiotechnology Federal University of Uberlandia-MGBrazilUberlândia 38400-902Brazil Corporate Social Responsibility Hospital Moinhos de VentoPorto Alegre 90035-004Brazil Postgraduate Program in Gastroenterology Universidade Federal do Rio Grande do SulPorto Alegre 91540-000Brazil Department of Nutrition Uniasselvi-Group VitruSanta Catarina 89082-262Brazil Postgraduate Program in Hepatology Universidade Federal de Ciências da Saúde de Porto AlegrePorto Alegre 90050-170Brazil Master in Physical Activity and Health Polytechnic Institute of BejaBeja 7800-000Portugal Degree in Nutrition Sciences Lusófona UniversityLisboa 1749-024Portugal

Inflammatory bowel disease(IBD)has as a main characteristic the exacerbation of the immune system against enterocytes,compromising the individual’s intestinal *** inflammatory cascade causes several nutritional deficiencies,which further compromise immunological functioning and,as a result,worsen the *** vicious cycle can be interrupted as the patient’s dietary pattern meets their needs according to their clinical condition,acting directly on the inflammatory process of IBD through the interaction of food,intestinal microbiota,and *** nutritional intervention for IBD has a crucial role in preventing and managing disease *** review addresses epigenetic modifications through dietary compounds as a mechanism for modulating the intestinal microbiota of patients with IBD.

关键词： Inflammatory bowel disease Epigenetics Nutrition Nutrigenetics

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Iron toxicity resistance strategies in tropical grasses:The role of apoplastic radicular barriers

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Journal of Environmental Sciences 2019年第4期31卷 257-266页

作者： Advanio Inacio Siqueira-silva Camilla Oliveira Rios Eduardo Gusmao pereira Institute of Biological and Health Sciences Federal University of Vicosa (UFV)Campus Florestal Minas Gerais Brazil Federal University of Western Para (UFOPA) University Campus of JurutiPara Brazil Postgradute Program in Management and Conservation of Natural and Agrarian Ecosystems UFV Campus Florestal Florestal Minas Gerais Brazil

The revegetation of mined areas poses a great challenge to the iron ore mining *** initial recovery process in degraded areas might rely on the use of Fe-resistant *** grasses, such as Paspalum densum and Echinochloa crus-galli, show different resistance strategies to iron toxicity; however, these mechanisms are poorly *** Fe-resistance mechanisms and direct iron toxicity as a function of root apex removal were investigated. To achieve this purpose, both grass species were grown for up to 480 hr in a nutrient solution containing 0.019 or 7 mmol/L Fe-EDTA after the root apices had been removed or maintained. Cultivation in the presence of excess iron-induced leaf bronzing and the formation of iron plaque on the root surfaces of both grass species, but was more significant on those plants whose root apex had been removed. Iron accumulation was higher in the roots, but reached phytotoxic levels in the aerial parts as well. It did not hinder the biosynthesis of chloroplastidic pigments. No significant changes in gas exchange and chlorophyll a fluorescence occurred in either grass when their roots were kept intact; the contrary was true for plants with excised root apices. In both studied grasses, the root apoplastic barriers had an important function in the restriction of iron translocation from the root to the aerial plant parts, especially in E. crus-galli. Root apex removal negatively influenced the iron toxicity resistance mechanisms(tolerance in P. densum and avoidance in E. crus-galli).

关键词： Paspalum densum Echinochloa crus-galli Apoplastic barrier Iron toxicity

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