Corantes naturais: uma alternativa aos indicadores de pH “convencionais”

Descrece-se a obtenção de extractos de diferentes vegetais, plantas e frutos e estabelece-se, para cada um, a respectiva escala de pH.Fundação para a Ciência e Tecnologi

Synthesis of esters derived from 2,3,4-tri-O-benzyl-alpha-D-methylglucoside

The synthesis of a set of esters obtained from the D-glucose derivative by reaction with several carboxylic acids: benzoic, phenylacetic, acetylsalicylic, 2-(3-bromopropoxy)benzoic acid and 4-(toluene-4- sulfonylamino)benzoic acid.FCT (Fundação para a Ciência e Tecnologia) and FEDER for financial support. The Bruker Avance III 400 spectrometer is part of the National NMR network and was purchased under the framework of the National Programme for Scientific Reequipment, contract REDE/1517/RMN/2005, with funds from POCI 2010 (FEDER) and (FCT). We are also grateful for research grant VZ MSMT- 0021627501, Czech Republic

Synthesis of esters derived from [4-(2-hydroxyethyl)-[1,2,3]triazol-1-yl]-2,3,4,6-tetra-O-acetyl-β-D-glucopyranose

The synthesis of six novel esters containing a triazole ring and an acetylated glucose residue are presentedFCT and FEDER, for National NMR Network (Bruker Avance II 400). We are also grateful for research grant VZ MSMT-0021627501, Czech Republi

Synthesis of esters derived from [4-(2-hydroxy-ethyl)-[1,2,3]triazol-1-YL-2,3,4,6-tetra-o-acetylglucopyranose

2,3,4-Tri-O-benzyl-alpha-D-methylglucoside was prepared and reacted with several acids: benzoic, phenylacetic, 2-(3-bromo-propoxy)-benzoic, acetylsalicylic and 4-(toluene-4-sulfonylamino)-benzoic. The products were isolated with low to fair yields and fully characterized by usual analytical techniquesFundação para a Ciência e Tecnologia and FEDER, for National NMR Network (Bruker Avance III 400). We are also grateful for research grant VZ MSMT-0021627501, Czech Republic

Estudio epidemiológico de cáncer en la adolescencia en centro de referencia

OBJECTIVE: To analyze the epidemiological characteristics of adolescents with cancer referred to an oncologic center, between 2000 and 2006. METHODS: A retrospective descriptive study was carried out in order to evaluate the epidemiological data of patients aged between ten and 19 years at diagnosis and admitted at the Institute of Oncology (IOP/Graacc) of Universidade Federal de São Paulo (UNIFESP), Brazil, between 2000 and 2006. RESULTS: Among 2,362 patients admitted during this period with a diagnosis of cancer, 629 (26.6%) were adolescents. Mean age was 13.7 years, being 56.8% male. Regarding race, 60.7% of the patients were white, 30% mulattoes, 6.5% blacks, and 2.5% of patients had no characterization of race in the medical records. The most frequent types of tumors were: central nervous system tumors (22.1%), osteosarcoma (14.6%), lymphoma (14.5%), and leukemia (14.5%). The overall survival at five years was 73.7%. Adolescents with the diagnosis of rhabdomyosarcoma presented disseminated disease and histology of worse prognosis, which contributed for increasing the mortality rate of this group of patients. CONCLUSIONS: Adolescents with cancer are a group of patients with distinct characteristics when compared to other cancer groups. Our results show differences in the prevalence of tumors during adolescence and childhood, in the later leukemias and central nervous system tumors predominate. It is crucial to facilitate the access of adolescents to oncologic centers in order to provide early diagnosis and proper treatment.OBJETIVO: Analizar las características epidemiológicas de los adolescentes portadores de neoplasias encaminados al Instituto de Oncología Pediátrica (IOP/GRAACC) de la Universidad Federal de São Paulo, entre los años 2000 a 2006. MÉTODOS: Se trata de un estudio retrospectivo descriptivo, en el que fueron evaluados los datos epidemiológicos de los pacientes, con edad entre 10 y 19 años al diagnóstico, admitidos entre los años de 2000 y 2006 en el IOP/GRAACC. RESULTADOS: Del total de 2.362 pacientes admitidos en ese periodo con diagnóstico de cáncer, 629 (26,6%) eran adolescentes. El promedio de edad fue de 13,8 años, siendo la mayoría del sexo masculino (56,8%). Respecto a la raza, 60,7% de los pacientes eran blancos. Los tipos de tumores más frecuentes fueron: tumores de sistema nervioso central (22,1%), osteosarcoma (14,6%), linfomas (14,5%) y leucemias (14,5%). La sobrevida global en cinco años de los 629 pacientes de este estudio fue de 73,7%. Se subraya que los adolescentes con rabdomiosarcoma admitidos al presente estudio presentaban enfermedad diseminada e histología de peor prognosis, contribuyendo al aumento en la tasa de mortalidad de este grupo de pacientes. CONCLUSIONES: Los adolescentes con cáncer corresponden a un grupo de pacientes que presenta características peculiares si comparados a otros grupos oncológicos. Hay diferencia histológica de los tumores de los adolescentes con los de la infancia, en que predominan leucemias y tumores del sistema nervioso central. En ese contexto, es fundamental facilitar el acceso de esos pacientes a centros especializados y ofrecer medios apropiados al diagnóstico temprano y tratamiento adecuado.OBJETIVO: Analisar as características epidemiológicas dos adolescentes portadores de neoplasias encaminhados para o Instituto de Oncologia Pediátrica (IOP/GRAACC) da Universidade Federal de São Paulo (UNIFESP), entre os anos de 2000 a 2006. MÉTODOS: Trata-se de um estudo retrospectivo descritivo, em que foram avaliados os dados epidemiológicos dos pacientes, com idade entre dez e19 anos ao diagnóstico, admitidos do ano 2000 a 2006 no IOP/Graacc. RESULTADOS: Do total de 2.362 pacientes admitidos neste período com diagnóstico de câncer, 629 (26,6%) eram adolescentes. A idade média encontrada foi de 13,8 anos, sendo a maioria do sexo masculino (56,8%). Em relação à raça, 60,7% dos pacientes eram brancos. Os tipos de tumores mais frequentes foram: tumores de sistema nervoso central (22,1%), osteossarcoma (14,6%), linfomas (14,5%) e leucemias (14,5%). A sobrevida global, em cinco anos, dos 629 pacientes deste estudo foi de 73,7%. Destaca-se que os adolescentes com rabdomiossarcoma apresentavam doença disseminada e histologia de pior prognóstico, contribuindo para o aumento na taxa de mortalidade deste grupo de pacientes. CONCLUSÕES: Os adolescentes com câncer correspondem a um grupo de pacientes que apresenta características peculiares quando comparado a outros grupos oncológicos. Há diferença histológica dos tumores dos adolescentes com os da infância, em que predominam leucemias e tumores do sistema nervoso central. Nesse contexto, é fundamental facilitar o acesso desses pacientes a centros especializados e oferecer meios apropriados para o diagnóstico precoce e tratamento adequado.Universidade Federal de São Paulo (UNIFESP), Escola Paulista de Medicina (EPM)UNIFESP Instituto de Oncologia Pediátrica Grupo de Apoio ao Adolescente e a Criança com CâncerUNIFESP, EPMUNIFESP, Instituto de Oncologia Pediátrica Grupo de Apoio ao Adolescente e a Criança com CâncerSciEL

Naphthotriazole derivatives : synthesis and fluorescence properties

Eight fluorescent compounds containing a naphthotriazole moiety substituted at position 2 by a (vinylsulfonyl)aryl group or its precursors, containing hydroxyl or sulphonic groups or N-methylglycine, were prepared and characterized. The products were recovered in moderate yields after column chromatography or recrystallization and identified by proton and carbon nuclear magnetic resonance spectroscopy. Double resonance, heteronuclear multiple quantum coherence and heteronuclear multiple bond correlation experiments were carried out for complete assignment of proton and carbon signals. Absorption and emission spectra were obtained, in acetonitrile, for all the compounds and the fluorescence quantum yields determined. All compounds are promising fluorescent probes due to their high fluorescence quantum yields.Research grant VZ MSMT-0021627501, Czech RepublicFundação para a Ciência e a Tecnologia (FCT) - REEQ/ 630/QUI/2005; REDE/1517/RMN/2005FEDER - REEQ/ 630/QUI/2005; REDE/1517/RMN/200

Antiproliferative effect of colonic fermented phenolic compounds from jaboticaba (Myrciaria trunciflora) fruit peel in a 3D cell model of colorectal cancer

Jaboticaba is a Brazilian native berry described as a rich source of phenolic compounds (PC) with health promoting effects. PC from jaboticaba peel powder (JPP) have low intestinal bio-accessibility and are catabolized by gut microbiota. However, the biological implication of PCderived metabolites produced during JPP digestion remains unclear. This study aimed to evaluate the antiproliferative effects of colonic fermented JPP (FJPP) in a 3D model of colorectal cancer (CRC) composed by HT29 spheroids. JPP samples fermented with human feces during 0, 2, 8, 24 or 48 h were incubated (10,000 µg mL−1 ) with spheroids, and cell viability was assessed after 72 h. Chemometric analyses (cluster and principal component analyses) were used to identify the main compounds responsible for the bioactive effect. The antiproliferative effect of FJPP in the CRC 3D model was increased between 8 h and 24 h of incubation, and this effect was associated with HHDP-digalloylglucose isomer and dihydroxyphenyl-γ-valerolactone. At 48 h of fermentation, the antiproliferative effect of FJPP was negligible, indicating that the presence of urolithins did not improve the bioactivity of JPP. These findings provide relevant knowledge on the role of colonic microbiota fermentation to generate active phenolic metabolites from JPP with positive impact on CRC

Protective Response Mechanisms to Heat Stress in Interaction with High [CO2] Conditions in Coffea spp.

This work was supported by national funds from Fundacao para a Ciencia e a Tecnologia through the projects PTDC/AGRPRO/3386/2012, the research units UID/AGR/04129/2013 (LEAF) and UID/GEO/04035/2013 (GeoBioTcc), as well through the grant SFRH/BPD/47563/2008 (AT) co-financed through the POPH program subsidized by the European Social Fund. Brazilian funding from CAPES (grams PDSE: 000427/2014-04, W.P. Rodrigues; 0343/2014-05, MM; 12226/12-2, LM), CNPq and Fapemig (fellowships to FDM, FP, and EC) are also greatly acknowledged.Modeling studies have predicted that coffee crop will be endangered by future global warming, but recent reports highlighted that high [CO2] can mitigate heat impacts on coffee. This work aimed at identifying heat protective mechanisms promoted by CO2 in Coffea arabica (cv. Icatu and IPR108) and Coffea canephora cv. Conilon CL153. Plants were grown at 25/20 degrees C (day/night), under 380 or 700 mu L CO2 L-1, and then gradually submitted to 31/25, 37/30, and 42/34 degrees C. Relevant heat tolerance up to 37/30 degrees C for both [CO2] and all coffee genotypes was observed, likely supported by the maintenance or increase of the pools of several protective molecules (neoxanthin, lutein, carotenes, ohtocopherol, HSP70, raffinose), activities of antioxidant enzymes, such as superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione reductase (GR), catalase (CAT), and the upregulated expression of some genes (ELIP, Chaperonin 20). However, at 42/34 degrees C a tolerance threshold was reached, mostly in the 380 -plants and Icatu. Adjustments in raffinose, lutein, beta-carotene, alpha-tocopherol and HSP70 pools, and the upregulated expression of genes related to protective (FLIPS, HSP70, Chape 20, and 60) and antioxidant (CAT, CuSOD2, APX Cyt, APX ChI) proteins were largely driven by temperature. However, enhanced [CO2] maintained higher activities of GR (Icatu) and CAT (Icatu and IPR108), kept (or even increased) the Cu,Zn-SOD, APX, and CAT activities, and promoted a greater upregulation of those enzyme genes, as well as those related to HSP70, ELIPs, Chaperonins in CL153, and Icatu. These changes likely favored the maintenance of reactive oxygen species (ROS) at controlled levels and contributed to mitigate of photosystem II photoinhibition at the highest temperature. Overall, our results highlighted the important role of enhanced [CO2] on the coffee crop acclimation and sustainability under predicted future global warming scenarios.publishersversionpublishe