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Non-Polar Chemical Constituents of Atemoya and Evaluation of the Cytotoxic and Antimicrobial Activity

Phyton-International Journal of Experimental Botany 2021年第3期90卷 921-931页

作者： Suzana Vieira Rabêlo Fernanda Granja da silva Oliveira Michele Miriam Calixto de Lira Livia Macedo Dutra Adilson Sartoratto Marta Cristina Teixeira Duarte Maria Claudia dos Santos Luciano Maria Francilene Souza silva Cláudia doÓPessoa Manoel Odorico de Moraes Filho Emmanoel Vilaça Costa jackson roberto guedes da silva almeida Post-Graduate Program in Biotechnology(RENORBIO) Federal Rural University of PernambucoRecifePernambuco52171-900Brazil Post-Graduate Program in Biotechnology State University of Feira de SantanaFeira de SantanaBahia44036-900Brazil Center for Studies and Research of Medicinal Plants(NEPLAME) Federal University of San Francisco ValleyPetrolinaPernambuco56304-205Brazil Multidisciplinary Center of Chemical Biological and Agricultural Research(CPQBA)Campinas State UniversityCampinasSão Paulo13083-970Brazil National Laboratory of Experimental Oncology(LabNOE) Federal University of CearáFortalezaCeará60020-181Brazil Departament of Chemistry Federal University of AmazonasManausAmazonas69067-005Brazil

This study aimed to identify the chemical composition of essential oil from fruits(EOAF)and the hexanic crude extract from aerial parts(At-Hex)of atemoya(Annona cherimola x Annona squamosa),a hybrid belonging to the Annonaceae *** and antimicrobial activity was also *** was obtained by hydrodistillation using a Clevenger apparatus,and their composition was analyzed by gas chromatography-mass spectrometry(GC-MS)*** was tested against human tumor cell lines HCT-116(colon carcinoma),SF-295(glioblastoma),OVCAR-8(ovarian carcinoma)and HL60(leukemia)using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide(MTT)assay,while antimicrobial activity was conducted by bioauthography method against eleven microorganisms ***-four compounds were identified in the EOAF and twenty-nine in *** monoterpenes linalool(25.70%),α-pinene(10.38%),β-pinene(9.12%),transocimene(7.43%),and the sesquiterpene bicyclogermacrene(12.58%)were the major constituents of EOAF,whereas the sesquiterpene spathulenol(13.91%)was the main compound of ***-Hex showed a high cytotoxicity against SF-295(glioblastoma).These findings show an important chemotaxonomic contribution for the Annonaceae family,mainly for the Annona *** proved to be a promising source of substances with potential cytotoxic activity.

关键词： Annona GC-MS volatile compounds terpenoids biologic activities

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Plant growth and metabolism of exotic and native Crotalaria species for mine land rehabilitation in the Amazon

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Journal of Forestry Research 2024年第1期35卷 143-154页

作者： Hemelyn Soares das Chagas Rafael silva guedes Markus Gastauer Paula Godinho Ribeiro Allan Klynger da silva Lobato Cecílio Frois Caldeira Fabrício William deÁvila AndréRodrigues dos Reis Silvio Junio Ramos Instituto Tecnológico Vale Rua Boaventura da Silva955BelémPA 66055-090Brazil Universidade Federal do Sul e Sudeste do Pará XinguaraPABrazil Núcleo de Pesquisa Vegetal Básica e Aplicada Universidade Federal Rural da AmazôniaParagominasPABrazil Departamento de Engenharia Florestal Universidade Estadual do Centro-Oeste/UNICENTROIratiPRBrazil School of Sciences and Engineering São Paulo State University(UNESP)TupãSP.CEP 17602-496Brazil

Despite its enormous benefits,mining is respon-sible for intense changes to vegetation and soil ***,after extraction,it is necessary to rehabilitate the mined areas,creating better conditions for the establishment of plant species which is *** study evaluated mineral and organic fertilization on the growth,and carbon and nitrogen(N)metabolism of two Crotalaria species[Cro-talaria spectabilis(exotic species)and Crotalaria maypu-rensis(native species from Carajás Mineral Province(CMP)]established on a waste pile from an iron mine in CMP.A control(without fertilizer application)and six fertilization mixtures were tested(i=NPK;ii=NPK+micronutrients;iii=NPK+micronutrients+organic compost;iv=PK;v=PK+micronutrients;vi=PK+micronutrients+organic compost).Fertilization contributed to increased growth of both species,and treatments with NPK and micronutrients had the best results(up to 257%***),while organic fertilization did not show *** Crotalaria had a greater number of nodules,higher nodule dry mass,chlorophyll a and b contents and showed free ammonium as the predominant N form,reflecting greater increments in biomass compared to native *** having lower growth,the use of this native species in the rehabilitation of mining areas should be considered,mainly because it has good development and meets current government legislation as an opportunity to restore local biodiversity.

关键词： Biological nitrogen fixation Mining Nitrogen metabolism Plant nutrition

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采用解析和数值方法分析浮动式矩形浮箱的波浪诱导载荷研究

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哈尔滨工程大学学报（英文版） 2024年第1期23卷 113-126页

作者： Sarat Chandra Mohapatra Iuri Baldaconi da silva Bispo Yuchan Guo C.guedes Soares Center for Marine Technology and Ocean Engineering(CENTEC) Instituto Superior TécnicoUniversidade de LisboaLisboa 1049-001Portugal

A three-dimensional mathematical hydrodynamic model associated with surface wave radiation by a floating rectangular box-type structure due to heave,sway,and roll motions in finite water depth is investigated based on small amplitude water wave theory and linear structural *** analytical expressions for the radiation potentials,wave forces,and hydrodynamic coefficients are presented based on matched eigenfunction expansion method(MEFEM).The correctness of the analytical results of wave forces is compared with the construction of a numerical model using the open-source boundary element method code *** addition,the present result is compared with the existing published experimental results available in the *** effects of the different design parameters on the floating box-type rectangular structure are studied by analyzing the vertical wave force,horizontal wave force,torque,added mass,and damping coefficients due to the heave,sway,and roll motions,and the comparison analysis between the forces is also analyzed in ***,the effect of reflection and transmission coefficients by varying the structural width and drafts are analyzed.

关键词： Mathematical model MEFEM Box-type structure BEM code NEMOH Wave forces

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Successful cetuximab rechallenge in metastatic colorectal cancer:A case report

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World Journal of Clinical Oncology 2024年第9期15卷 1232-1238页

作者： Alexandra guedes Sandra silva Sandra Custódio Andreia Capela Department of Medical Oncology Centro Hospitalar Gaia/EspinhoVila Nova de Gaia 4434-502Portugal

BACKGROUND Metastatic colorectal cancer(mCRC)treatment has been evolving and increasingly driven by tumor biology and gene expression *** with epidermal growth factor receptor(EGFR)inhibitors(anti-EGFR)represents a promising strategy for patients with RAS wild-type(RAS-wt)mCRC and circulating tumor DNA has emerged as a potential selection ***,we report the case of a RAS-wt mCRC patient who had a successful response to cetuximab *** SUMMARY Our patient was diagnosed with stage IV RAS-wt,microsatellite-stable rectosigmoid junction *** was started on first-line treatment with FOLFIRI and cetuximab and achieved partial response,allowing for a left hepatectomy(R0),followed by post-operative chemotherapy and an anterior resection;progression-free survival(PFS)of 16 months was *** to hepatic and nodal relapse,second-line treatment with FOLFOX and bevacizumab was started with partial response;metastasectomy was performed(R0),achieving a PFS of 11 *** a 15 months anti-EGFR-free interval,FOLFIRI and cetuximab were reintroduced upon disease progression,again with partial response and a PFS of 16 *** extensive hepatic relapse,cetuximab was reintroduced and a marked clinical and analytical improvement was seen,after only one *** status was confirmed on circulating tumor *** patient’s overall survival exceeded 5 *** Our case provides real-world data to support cetuximab rechallenge in later lines of RAS-wt mCRC treatment.

关键词： Metastatic colorectal cancer RAS mutation RAS wild type Anti-epidermal growth factor receptor Cetuximab Rechallenge Case report

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Immune response to inactivated bacterial vector carrying the recombinant K39 antigen of Leishmania infantum in mice

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Asian Pacific Journal of Tropical Biomedicine 2024年第5期14卷 199-206页

作者： Lucelina S.Araújo Bruno B.silva Eduarda N.F.N.Santos Arnaldo S.Bezerra Samuel S.Frota Assis R.Montenegro Eridan O.P.T.Florean Maurício Fvan Tilburg Maria Izabel F.guedes Laboratory of Biotechnology and Molecular Biology Northeast Biotechnology NetworkState University of CearáFortalezaBrazil Faculty of Veterinary Medicine State University of CearáFortalezaBrazil

Objective:To evaluate the immunological response elicited by an inactivated bacterial vector carrying the K39 antigen of Leishmania infantum,and a purified ***:Mice were subjected to the following treatments:(1)Purified recombinant K39(rK39)protein at a 20μg dose with complete Freund’s adjuvant;(2)Inactivated Escherichia coli(BL21 DE3)carrying the K39 protein at an equivalent total protein content of 200μg;(3)Inactivated bacteria lacking the K39 protein;(4)Non-immunized control *** monitoring was *** groups were challenged by intraperitoneal injection of 10^(7) Leishmania infantum *** euthanasia,the liver and spleen were collected to analyze the levels of TNF,IFN-γ,IL-12,IL-4,and ***:Mice immunized with purified rK39 or the inactivated bacterial vector carrying the K39 antigen of Leishmania infantum showed a long-lasting immune response with high levels of polyclonal antibodies specifically recognizing the recombinant *** IgG1 subclass was the predominant immunoglobulin;however,the induction of IgG2a and the profile of cytokines produced were indicative of the induction of a mixed-type ***:The inactivated bacterial vector carrying the K39 antigen,as well as the purified antigen can induce a long-lasting immune response in immunized mice,predominantly favouring a Th2 profile response.

关键词： Visceral leishmaniasis K39 Inactivated bacterial vector Vaccine Immune response Th1 Th2 Leishmania infantum

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Gangliosides in nervous system development,regeneration,and pathologies

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Neural Regeneration Research 2023年第1期18卷 81-86页

作者： Juliana F.Vasques Renata guedes de Jesus Gonçalves Almir Jordão da silva-Junior Robertta silva Martins Fernanda Gubert Rosalia Mendez-Otero Instituto de Ciências Biomédicas Universidade Federal do Rio de JaneiroRio de JaneiroBrazil Instituto de Biofísica Carlos Chagas Filho Universidade Federal do Rio de JaneiroRio de JaneiroBrazil Programa Redes de Pesquisa em Saúde no Estado do Rio de Janeiro Rio de JaneiroBrazil Programa Rede NanoSaúde do Estado do Rio de Janeiro Rio de JaneiroBrazil Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa Rio de JaneiroBrazil

Gangliosides,sialic acid-containing sphingolipids,are major constituents of neuronal *** to the number of sialic acids and the structure of the oligosaccharide chain,gangliosides can be classified as simple or complex and grouped in different *** of gangliosides have been identified in vertebrate cells,with different expression patterns during development and related to several physiological processes,especially in the nervous *** GD3 and its O-acetylated form,9acGD3,are highly expressed in early developmental stages,GM1,GD1a,GD1b,and GT1b are the most abundant ganglioside species in the mature nervous *** in enzymes involved in ganglioside metabolism can lead to the accumulation of specific species,a condition termed gangliosidosis and usually marked by severe neurological *** in ganglioside levels have also been described in several neurodegenerative diseases,such as Alzheimer’s and Parkinson’*** this review,we summarized recent information about the roles of GD3,9acGD3,GM1,GD1a,GD1b,GT1b,and other ganglioside species in nervous system development and regeneration,as well as clinical trials evaluating possible therapeutic applications of these molecules.

关键词： 9acGD3 gangliosides GD1a GD1b GD3 glycolipids GM1 GM2 GM3 GM4 GT1b

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Plant growth and metabolism of exotic and native Crotalaria species for mine land rehabilitation in the Amazon

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林业研究（英文版） 2024年第1期 147页

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Mesenchymal stem cell-and extracellular vesicle-based therapies for Alzheimer's disease:progress,advantages,and challenges

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Neural Regeneration Research 2023年第8期18卷 1645-1651页

作者： Renata guedes de Jesus Gonçalves Juliana Ferreira Vasques Almir Jordão da silva-Junior Fernanda Gubert Rosalia Mendez-Otero Instituto de Biofísica Carlos Chagas Filho Universidade Federal do Rio de JaneiroRio de JaneiroBrazil Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa Rio de JaneiroBrazil Plataformas Inovadoras em Terapias Avançadas Departamento de Ciência e Tecnologia-Ministério da Saúde(DECIT-MS)Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq)Brazil Programa Redes de Pesquisa em Saúde no Estado do Rio de Janeiro Rio de JaneiroBrazil Instituto de Ciências Biomédicas Universidade Federal do Rio de JaneiroRio de JaneiroBrazil Programa Redes de Pesquisa em Nanotecnologia no Estado do Rio de Janeiro Rio de JaneiroBrazil

Alzheimer's disease is a severe, highly disabling neurodegenerative disease, clinically characterized by a progressive decline in cognitive functions, and is the most common form of dementia in the elderly. For decades, the search for disease-modifying therapies has focused on the two main Alzheimer's disease histopathological hallmarks, seeking to prevent, mitigate, or clear the formation of extracellular aggregates of β-amyloid peptide and intracellular neurofibrillary tangles of tau protein, although without clinical success. Mesenchymal stem cell-based therapy has emerged as a promising alternative for the treatment of Alzheimer's disease, especially because it also targets other crucial players in the pathogenesis of the disease, such as neuroinflammation, synaptic dysfunction/loss, oxidative stress, and impaired neurogenesis. Herein, we review current knowledge of the therapeutic potential of mesenchymal stem cells and their extracellular vesicles for Alzheimer's disease, discussing the most recent findings in both preclinical and clinical trials as well as how advanced technologies have helped to overcome some limitations and contributed to stimulate the development of more effective treatments.

关键词： Alzheimer's disease amyloid-β cell therapy cell transplantation exosomes extracellular vesicles mesenchymal stem cell micro vesicles neuroinflammation tau protein

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Effect of rare-earth oxides on properties of silicon nitride obtained by normal sintering and sinter-HIP

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Journal of Rare Earths 2012年第11期30卷 1177-1183页

作者： Cecilia C.guedes-silva Flávio Machado de Souza Carvalho José Carlos Bressiani Nuclear and Energy Research Institute-IPEN/CNEN Geoscience Institute-IGC/USP

This paper presented the microstructure, mechanical properties and oxidation behavior of silicon nitride obtained by both conventional sintering and sintering followed by hot isostatic pressing （HIP）. Silicon nitride with additives such as 5 wt.% Al2O3 and 5 wt.% Ln203 （Ln= La, La concentrate, Gd or La＋Gd） were studied. The results revealed that Gd203 additions increased the formation of elongated grains of β-Si3N4, the fracture toughness and oxidation resistance. La2O3 additions led to higher densification and hardness values, while addition of La2O3 concentrate promoted the formation of materials with intermediate properties, compared to the other studied compositions. Hot isostatic pressing increased the hardness but decreased the fracture toughness of the material, mainly because it allowed residual pores to close and also reduced the average aspect ratio of β-Si3N4 grains.

关键词： rare earths silicon nitride properties normal sintering sinter-HIP

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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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