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au:SILVA, TATIANA S. DA

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Validation HPLC-DAD Method for Quantification of Gallic and Ellagic Acid from Eugenia punicifolia Leaves, Extracts and Fractions
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Silva, Liliane S.

; Oliveira, Matheus G. de

; Martins, Christiane F.

; Borges, Leonardo L.

; Fiuza, Tatiana S.

; Conceição, Edemilson C. da

; Paula, José R. de

Journal of the Brazilian Chemical Society

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mar 2023, Volume 34 N. 3 Pages 401 - 413

Abstract: En | Text: En | PDF: En

Eugenia punicifolia (Kunth) DC, known as “pedra ume-caá” or “pitanguinha do cerrado”, is popularly used to treat infectious diseases like inflammation, and diabetes. Therefore, this study aimed to develop and validate an analytical method by high-performance liquid chromatography with diode array detector (HPLC-DAD) for the seasonal quantification of gallic acid (GA) and ellagic acid (EA), and to co-validate the method for quantification from the ethanol extract and fractions of the E. punicifolia leaves. Chromatographic separations were performed with a mobile phase gradient of acetonitrile/methanol/water acidified with 0.2% formic acid, a flow of 0.8 mL min 1, detection at 254 nm, and a C18 column (250 × 4.6 mm, 5 µm). Method validation parameters were determined following Brazilian legislation. The HPLC-DAD analytical method developed for the quantification of GA and EA was validated and demonstrated to be selective, linear, precise, accurate, robust, and without matrix effect. Accordingly, it is helpful for the analysis of these tannins in crude ethanol extracts and fractions from E. punicifoila leaves. Thus, our results may be of great help for quality control assessment and standardization of raw materials containing Eugenia punicifolia.

https://doi.org/10.21577/0103-5053.20220117

Immunopathological evaluation of oral squamous cell carcinomas: a case series
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Souza, Vinícius G. de

; Santos, Damilys J.

; Araújo, Tatiana S.

; Silva, Ana G.

; Ribeiro, Rosy I.

; Loyola, Adriano M.

; Cardoso, Sérgio V.

; Siqueira-Miranda, Carla S.

; Cardoso, Ludimila P.

Gaceta mexicana de oncología

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2023, Volume 22 Suppl. 1 Pages 100 - 104

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Resumen La evaluación de la expresión del ligando 1 de muerte programada (PD-L1) es un criterio de elegibilidad para la inmunoterapia anti-PD-L1 en el carcinoma oral de células escamosas (COCE). También deben evaluarse otros componentes del microambiente tisular. Aquí se informaron cuatro casos de carcinoma de células escamosas orales. Se realizaron análisis histopatológicos del grado tumoral y TIL (infiltrado inflamatorio asociado a tumor) e inmunohistoquímica para CD4, CD8 y PD-L1. Los casos se clasificaron según el microambiente tisular en resistencia inmunitaria adaptativa, ignorancia inmunológica, tolerancia o inducción intrínseca. Este análisis destaca la importancia de comprender el microambiente inmunológico que puede presentar el COCE para la identificación de dianas terapéuticas más eficaces contra la enfermedad.

Abstract The evaluation of the expression of programmed cell death protein (PD-L1) is an eligibility criterion for anti-PD-L1 immunotherapy in oral squamous cell carcinoma (OSCC). Other components of tissue microenvironment should also be evaluated. Here, four cases of oral squamous cells carcinoma were reported. Histopathological analysis of tumor grade and TILs and immunohistochemistry for CD4, CD8, and PD-L1 was done. The cases were classified according to the tissue microenvironment in adaptive immune resistance, immunological ignorance, tolerance, or intrinsic induction. This analysis highlights the importance of understanding the immunological microenvironment that the OSCC can present for the identification of more effective therapeutic targets against the disease.

https://doi.org/10.24875/j.gamo.22000145

How many species of Mollusca are there in Brazil? A collective taxonomic effort to reveal this still unknown diversity
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Machado, Fabrizio M.

; Miranda, Marcel S.

; Salvador, Rodrigo B.

; Pimenta, Alexandre D.

; Côrtes, Mariana O.

; Gomes, Jaime A.J.

; Miyahira, Igor C.

; Agudo-Padrón, Ignacio

; Oliveira, Cléo D.C.

; Caetano, Carlos H.S.

; Coelho, Paulo R.S.

; D’Ávila, Sthefane

; Arruda, Eliane P. de

; Almeida, Sérgio M. de

; Gomes, Suzete R.

; Alvim, Juliana

; Galvão-Filho, Hilton

; L. Ferreira-Júnior, Augusto

; Marques, Rodrigo C.

; Martins, Inês

; Souza, Leonardo S. de

; Arruda, Janine O.

; Cavallari, Daniel C.

; Santos, Sonia B. dos

; Pedro, Natan C.

; Salles, Anna C. de A.

; Dornellas, Ana P.S.

; Lima, Tarcilla C. de

; Amaral, Vanessa S. do

; Silva, Fernanda S.

; Passos, Flávio D.

; Thiengo, Silvana S.

; Leite, Tatiana S.

; Simone, Luiz R.L.

Zoologia (Curitiba)

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2023, Volume 40 elocation e23026

Abstract: En | Text: En | PDF: En

ABSTRACT The expression ‘you need to know to conserve’ is a well-known cliche among biologists. Documenting the richness of a group of organisms is the first step towards understanding biodiversity and preparing efficient conservation plans. In this context, many efforts have been made to quantify the number of species on Earth and estimate the number of species still unknown to science. A few countries have complete and integrated databases estimating the approximate number of species recorded for their territory, particularly in the Global South. In Brazil, a country of continental dimensions, revealing the richness of the second most diverse clade of invertebrates (=Mollusca) has been a goal of taxonomists. Recently, in an unprecedented, collective, and integrated effort among Brazilian malacologists, it was possible to estimate how many valid species of molluscs are there in Brazil. In this effort, more than 30 mollusc experts joined together to update the Taxonomic Catalogue of the Brazilian Fauna (TCBF), a governmental website that allows a quick and real-time updating of all Metazoan. So far, more than 5,000 updates have been made in TCBF, indicating the presence of 3,552 valid species of molluscs in Brazil, distributed among the main clades as follows: Caudofoveata (10 spp.), Solenogastres (6 spp.), Polyplacophora (35 spp.), Scaphopoda (43 spp.), Cephalopoda (92 spp.), Bivalvia (629 spp.) and Gastropoda (2,737 spp.). The present study, in addition to demonstrating for the first time the richness of Brazilian molluscs, also presents the state of the art of this important phylum of invertebrates highlighting its most representative and neglected groups.

https://doi.org/10.1590/s1984-4689.v40.e23026

Association of additives in supplemented grazing cattle during the finishing phase at the rainy season
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Dallantonia, Erick Escobar

; Silva, Lorrayny Galoro da

; Granja-Salcedo, Yury Tatiana

; Messana, Juliana Duarte

; Brito, Liziane de Figueiredo

; Lima, Ana Rebeca Castro

; Vito, Elias San

; Castagnino, Pablo de Souza

; Silva Sobrinho, Américo Garcia da

; Reis, Ricardo Andrade

; Berchielli, Telma Teresinha

Revista Brasileira de Zootecnia

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2023, Volume 52 elocation e20210225

Abstract: En | Text: En | PDF: En

ABSTRACT The objectives were to evaluate the effects of monensin and virginiamycin, alone or combined, on supplemented Nellore cattle grazing tropical grass during the rainy season. Two experiments were conducted simultaneously to evaluate intake, digestibility, CH4 emissions, blood parameters, performance, and carcass characteristics (Exp. 1), and ruminal fermentation and relative abundance of ruminal microorganisms (Exp. 2). Animals (n = 92 Exp. 1 and n = 12 Exp. 2) were distributed in a completely randomized design and allocated in twelve paddocks composed of Urochloa brizantha (A. Rich.) Stapf. cv. Xaraés. A protein-energetic supplementation of 3 g/kg of BW per day was provided to all animals. Supplements were: without additives (WA), monensin alone at 80 mg/kg of product (MN), virginiamycin alone at 150 mg/kg of product (VM), and monensin (80 mg/kg of product) combined with virginiamycin (150 mg/kg of product; MNVM). Treatments did not affect intakes of total dry matter (DM), supplement DM, and nutrients. However, the intakes of forage DM and crude protein decreased in cattle fed MNVM compared with animals fed WA, MN, and VM. Total volatile fatty acids increased in animals fed VM. Ruminal NH3-N decreased, and pH increased in animals fed MN, VM, and MNVM. Relative abundance of total F. succinogenes and S. ruminantium decreased and R. flavefaciens increased in animals fed MN and VM at d 118. Treatments had no effect on enteric CH4 emissions. The average daily gain (ADG) and total gain were greater in cattle fed MNVM than in cattle fed MN. Combination of monensin and virginiamycin altered the rumen microbial populations but did not decrease enteric CH4 emissions. However, it decreased forage dry matter intake without altering the ADG and total weight gain, leading to an increase in feed efficiency. Results from this study indicate an advantage in including feed additives combined in the diet of supplemented Nellore cattle grazing tropical grass during the rainy season.

https://doi.org/10.37496/rbz5220210225

Evaluation of Flow Accelerated Corrosion in Typical Recovery Boiler Environments of Energy Production Industries
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Moreira, Rogaciano M.

; Almeida, Tatiana C.

; Bandeira, Merlin C. E.

; Assunção, Felipe R. S.

; Carvalho, Juliana F. A.

; Silva, Elaine F.

; Verbicario, João V. T.

; Mattos, Oscar R.

; Oliveira, Jefferson R.

; Bonfim, André L. C.

; Novgorodecev, André R.

Materials Research

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2022, Volume 25 Suppl. 1 elocation e20210520

Abstract: En | Text: En | PDF: En

Abstract Flow accelerated corrosion (FAC) is a steel degradation that occurs in heat recovery steam generators in the power industry. The mechanism of this corrosion comprises an electrochemical dissolution of the semi-protective magnetite layer (Fe3O4) that is formed within the pipes employed in the boilers. The FAC is influenced by different factors such as fluid velocity, pH and dissolved oxygen concentration. In this context, Rotating Cage tests were used to evaluate the influence of pH and dissolved oxygen content on FAC of A210, P11 and P22 steels. General corrosion was lower for P11 and P22 steels, an effect consistent with the presence of chromium in their compositions. General corrosion was most critical at pH 8.5. The corrosion intensity decreased for the three steels when the dissolved oxygen concentration increased, at 2 m/s. This behavior is coherent considering the most effective precipitation of Fe2O3 inside the pores of the Fe3O4 layer in a more oxidizing environment. For 3 m/s, the corrosion intensity increased for both materials when oxygen increased, showing the shear stress effect. These behaviors were more significant at pH 8.5. About pitting corrosion, the analyzes show localized attack in the majority of coupons, however with very low number of pits.

https://doi.org/10.1590/1980-5373-mr-2021-0520

TiO2 Nanocrystals and Annona crassiflora Polyphenols Used Alone or Mixed Impact Differently on Wound Repair
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MOURA, FRANCYELLE B.R. DE

; FERREIRA, BRUNO ANTONIO

; MUNIZ, ELUSCA HELENA

; SANTOS, RINARA A.

; GOMIDE, JOSÉ AUGUSTO L.

; JUSTINO, ALLISSON B.

; SILVA, ANIELLE CHRISTINE A.

; DANTAS, NOELIO O.

; RIBEIRO, DANIELE L.

; ARAÚJO, FERNANDA A.

; ESPINDOLA, FOUED S.

; TOMIOSSO, TATIANA CARLA

Anais da Academia Brasileira de Ciências

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2022, Volume 94 N. 2 elocation e20210230

Abstract: En | Text: En | PDF: En

Abstract Wounds treated with TiO2 nanoparticles (TiO2-NPs) show an improvement in healing time. However, little is known about the parameters that can contribute to this result. On the other hand, the treatment of wounds with polyphenols is widely known. These compounds are found in the peel of Annona crassiflora fruit and have antioxidant, analgesic and anti-inflammatory properties. In this study, we evaluated the healing effect of TiO2 nanocrystals (TiO2-NCs), polyphenolic fractions obtained from ethanolic extract of A. crassiflora fruit peel (PFAC) and mix (PFAC + TiO2-NCs) on the parameters of wound closure, inflammation, collagen deposition, metalloproteinase activity (MMPs) and angiogenesis. TiO2-NCs and PFAC have activity for wound healing, showed anti-inflammatory action and a shorter wound closure time. These treatments also contributed to increased collagen deposition, while only treatment with TiO2-NCs increased MMP-2 activity, parameters essential for the migration of keratinocytes and for complete restoration of the injured tissue. The combination of PFAC + TiO2-NCs reduced the effectiveness of individual treatments by intensifying the inflammatory process, in addition to delaying wound closure. We conclude that the interaction between the hydroxyl groups of PFAC polyphenols with TiO2-NCs may have contributed to difference in the healing activity of skin wounds.

https://doi.org/10.1590/0001-3765202220210230

Estudio químico del aroma y bioactividad de la fruta del pepino dulce (Solanum muricatum)
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Díaz, Karen Nataly

; Cuadrado-Silva, Carmen Tatiana

; Osorio, Coralia

Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales

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jun 2021, Volume 45 N. 175 Pages 582 - 590

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Resumen Los compuestos volátiles activos olfativamente en el aroma de la fruta del pepino dulce (Solanun muricatum) se extrajeron mediante la técnica de extracción de aroma asistido por disolventes (solvent-assisted flavor evaporation, SAFE), se analizaron por cromatografía de gases acoplada a olfatometría (CGO), y cromatografía de gases acoplada a espectrometría de masas (CG/EM) y se compararon con estándares. Los compuestos con más influencia en el aroma de la fruta se diferenciaron mediante el análisis por dilución del extracto de aroma (aroma extract dilution analysis, AEDA). Con base en el cálculo del valor de la actividad del olor (odor activity value, OAV) se identificaron como compuestos de impacto de la fruta el E-6-nonenal (nota acuosa), el E-2-nonenal (nota verde-pepino), el hexanal (nota verde), el nonanal (nota verde-pepino) y la 1-penten-3-ona (nota etérea). También se estudiaron in vitro algunas de las propiedades biofuncionales de la fruta: la actividad antihipertensiva mediante la inhibición de la enzima convertidora de angiotensina-I (ECA-I) y la actividad antihipercolesterolémica con base en la inhibición de la 3-hidroxi-3-metilglutaril-coenzima A (HMG-CoA) reductasa. Se encontró que la fruta presenta una actividad inhibitoria de la ECA-I promisoria (IC50=3,72 ± 0,19 ppm), ya que se obtuvo un valor mucho menor que el obtenido para el control positivo (lisinopril). También se evidenció con el tiempo que el extracto de la fruta inhibió la actividad de la HMG-CoA reductasa con una cinética comparable a la del control positivo (pravastatina). Con estos resultados, la fruta de S. muricatum se convierte en una candidata potencial para el desarrollo de alimentos funcionales.

Abstract Odor-active volatile compounds of sweet cucumber (Solanum muricatum) fruit were extracted by using the solvent-assisted flavor evaporation (SAFE) technique and analyzed, by gas chromatography coupled to olfactometry (GC-O) and gas chromatography coupled to mass spectrometry (GC-MS), and compared with standards. The most relevant compounds in the aroma of this fruit were determined by the aroma extract dilution analysis (AEDA) technique. Based on the odor activity value (OAV) the following key-aroma compounds were identified: (ii)-6-nonenal (aqueous odor note), (E)-2-nonenal (green, cucumber-like odor note), hexanal (green odor note), nonanal (green, vegetable odor note), and 1-penten-3-one (ethereal note). Some biofunctional properties of the fruit were studied in vitro. Antihypertensive and anti-hypercholesterolemic activities were measured by using the angiotensin-converting enzyme inhibition (ACE-I) and the 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase inhibition assays, respectively. The fruit exhibited a promising ACE-I inhibitory activity (IC50=3.72 ± 0.19 ppm) but lower than that of the positive control (lisinopril). The fruit extract inhibited the activity of the HMG-CoA reductase over time with similar kinetics to the positive control (pravastatin). Based on these results, S. muricatum fruit could be considered a potential candidate for the development of functional foods.

https://doi.org/10.18257/raccefyn.1323 67 downloads

In vitro storage of sweet passion fruit seeds as an innovation conservation alternative
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JUNGHANS, TATIANA G.

; JESUS, ONILDO N.

; SILVA, JAILTON J.

; FERREIRA, MICHELE S.

Anais da Academia Brasileira de Ciências

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2021, Volume 93 N. 3 elocation e20190901

Abstract: En | Text: En | PDF: En

Abstract Sweet passion fruit (Passiflora alata Curtis) is a species native to Brazil that is economically important for fruit consumption and can also be used as an ornamental plant. The objective of this work was to evaluate different forms of storing Passiflora alata seeds for the purpose of preserving accessions in germplasm banks. Three experiments were performed. In the first, the seeds without aril were stored for two periods (one and three years) in plastic bags and in in vitro culture medium at two temperatures. In the second, the seeds with and without aril were stored for one year in plastic boxes and in vitro culture medium at two temperatures. In the third, the seeds were kept for two years in different in vitro culture media. The seeds quickly lost viability when stored for one year conventionally in a cold chamber with 25% emergence, but remained viable when were stored in vitro with 90% emergence. Therefore, the use of in vitro culture medium is an innovative way to preserve sweet passion fruit seeds at 25 oC. The seeds of the Passiflora alata evaluated should be considered recalcitrant.

https://doi.org/10.1590/0001-3765202120190901 75 downloads

Chemical profile of Stachytarpheta schottiana by LC-HRMS/MS dereplication and molecular networking
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Silva, Marcos Vinicius Toledo e

; Garrett, Rafael

; Simas, Daniel Luiz Reis

; Konno, Tatiana Ungaretti Paleo

; Muzitano, Michelle Frazão

; Pinto, Shaft Corrêa

; Barth, Thiago

Rodriguésia

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2021, Volume 72 elocation e00772020

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo As restingas são ambientes com características extremas, que fazem parte do bioma da Mata Atlântica. Estes ambientes apresentam características peculiares, como solo arenoso e altas salinidade e exposição solar, o que torna as espécies presentes interessantes para a ciência. A espécie Stachytarpheta schottiana é endêmica do Brasil, presente em restingas e, assim como outras espécies do gênero, apresenta uso na medicina popular. Neste trabalho são descritos pela primeira vez 28 metabólitos secundários da espécie S. schottiana, como iridoides, lignanas, flavonoides e feniletanoides, através do uso de metodologias de desreplicação e molecular networking por LC-HRMS/MS. Destas substâncias, muitas sequer foram descritas para o gênero, como astragalina, taxifolina, lamiídeo e toda a classe de lignanas. Ainda neste trabalho, a Cromatografia Contracorrente de Alta Velocidade (High Speed Countercurrent Chromatography - HSCCC) e a Ressonância Magnética Nuclear (RMN) foram utilizadas para corrigir a identificação equivocada de duas substâncias, bem como para a criação de seeds que seriam posteriormente utilizadas nos molecular networkings. Algumas das substâncias conhecidas sugeridas neste trabalho apresentam atividades biológicas já descritas na literatura que coincidem com o uso popular descrito para a espécie e também para o gênero, como o efeito hepatoprotetor do verbascosídeo.

Abstract Restingas are extreme environments present in the Atlantic Rainforest biome. These ecosystems show peculiar characteristics, like sandy soil, high salinity, and high solar exposure, which brings scientific interest to their native species. Stachytarpheta schottiana is an endemic Brazilian species found in Jurubatiba Restinga, and just like other species of the genus Stachytarpheta, is used in folk medicine. In this paper, we describe, for the first time, 28 secondary metabolites from S. schottiana polar extract, among them iridoids, flavonoids, lignans and phenylethanoids, with the use of LC-HRMS/MS dereplication and molecular networking methodologies. Many of these compounds have not been described yet for the genus Stachytarpheta, like astragalin, taxifolin, lamiide and the lignans secondary metabolites class. Also, in this paper, High Speed Counter-Current Chromatography (HSCCC) isolation and Nuclear Magnetic Resonance (NMR) of two compounds were used to correct a misidentification in the dereplication procedure and to create seeds for molecular networking. Some of the suggested known compounds found in this work have had their biological activities described in the literature, such as the hepatoprotective activity of verbascoside, that matches those already related for the genus Stachytarpheta and for the folk use of Stachytarpheta schottiana itself.

https://doi.org/10.1590/2175-7860202172099 48 downloads

10.

Safety issues of raw milk: evaluation of bacteriological and physicochemical characteristics of human milk from a bank in a teaching hospital, focusing on Staphylococcus species
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Salerno, Tatiana

; Siqueira, Amanda Keller

; Pinto, José Paes de Almeida Nogueira

; Cunha, Maria de Lourdes Ribeiro de Souza da

; Silvestre, Patrícia Kelly

; Condas, Larissa Anuska Zeni

; Lara, Gustavo Henrique Batista

; Pereira, Juliano Gonçalves

; Silva, Aristeu Vieira da

; Listoni, Fernando José Paganini

; Martins, Lorrayne de Souza Araújo

; Motta, Rodrigo Garcia

; Ribeiro, Márcio Garcia

Revista do Instituto de Medicina Tropical de São Paulo

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2021, Volume 63 elocation e54

Abstract: En | Text: En | PDF: En

ABSTRACT Many infants are nurtured with milk supplied by human banks, whose bacteriological and physical-chemical profiles are a major issue. We investigated the bacteriological and physical-chemical characteristics, as well as genotypic and phenotypic and profiles of Staphylococcus species isolated from 240 samples of breast milk from a bank in a teaching hospital. Dornic acidity of milk revealed that 95.4% (229/240) had acceptable limits (< 8.0 oD). Caloric intake showed a wide variation in cream content (4%), fat (4%) and energy values (559.81 Kcal/L). Staphylococcus (105/186 or 56.5%) and Enterobacter (25/186 or 13.4%) were the most prevalent genera, although other microorganisms were identified, including Klebsiella pneumoniae and Pseudomonas aeruginosa. Amoxicillin/clavulanic acid (125/157 or 79.6%), vancomycin (115/157 or 73.2%), and cephalexin (112/157 or 71.3%) were the most effective antimicrobials. High resistance rates of isolates were found to penicillin G (141/157 or 89.8%), ampicillin (135/157 or 86%), and oxacillin (118/157 or 75.2%). Multidrug resistance to ≥ 3 antimicrobials occurred in 66.2% (123/186) of the isolates. Residues of microbial multiplication inhibitory substances were found in 85% (204/240) of samples. Among the coagulase-positive-CPS and negative-CoNS staphylococci, the mecA gene was detected in 53.3% (8/15) and 75% (30/40), respectively. Genes sea, seb and sec were detected in 20% (3/15) of CPS, while tsst-1 was detected in 13.34% (2/15). In addition, 13.3% (2/15) of S. aureus were toxin-producers. Genes sea, seb and sec were detected in 90% (36/40), 5% (2/40) and 15% (6/40) CoNS, respectively. Enterotoxin production was identified in 5% (2/40) of CoNS. The identification of multidrug-resistant bacteria, staphylococci species toxin-producers harboring methicillin-resistance genes, and residues of microbial multiplication inhibitory substances reinforce the need for a continuous vigilance of milk quality offered to infant consumption by human banks.

https://doi.org/10.1590/s1678-9946202163054 198 downloads

11.

Phytochemical Analysis, Multi-Element Composition and Biological Activities of Extracts and Lupenone from Albizia inundata (Mart.) Barneby & J.W.Grimes
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Andrade, Eberson M. J.

; Teixeira, Jéssica S.

; Silva, Dahara K. C.

; Santos, Tatiana B. dos

; Korn, Maria G. A.

; Brandão, Hugo N.

; Ferraz, Caline G.

; Meira, Cássio S.

; Soares, Milena B. P.

; Guimarães, Elisava T.

; C. S. Neta, Lourdes

; F. S. Júnior, Aníbal

Journal of the Brazilian Chemical Society

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sep 2020, Volume 31 N. 9 Pages 1825 - 1837

Abstract: En | Text: En | PDF: En

In this study, antimicrobial activity of extracts and lupenone from A. inundata (Fabaceae, Mimosoideae), were tested. In addition, the multi-element composition of the leaves, bark and stems (heartwood) of A. inundata was evaluated using inductively coupled plasma optical emission spectrometry (ICP OES). Lupenone was isolated in the petroleum ether extract of leaves, for the first time. Biological assays were conducted to evaluate the antimicrobial (antibacterial, antifungal and antiparasitic) of extracts, their fractions and lupenone. The results showed antimicrobial and antileishmanial activity of these compounds, which may be useful for obtaining a chemical composition and biological activity database on Albizia species. For multi-element composition, we found the mean concentrations (minimum-maximum) of Al, Ca, Cr, Cu, Fe, K, Mg, Mn, Ni, P, V and Zn in the samples ranged between 0.06 and 265.41 µg g-1. Concentration ranges of Cu, Fe, Mn and Zn are large, which makes these samples as additional sources of these macronutrients.

https://doi.org/10.21577/0103-5053.20200069 360 downloads

12.

Immunotherapy Treatment Against Cervical Cancer
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Jiménez-Lima, Roberto

; Arango-Bravo, Eder

; Galicia-Carmona, Tatiana

; Lino-Silva, Leonardo S.

; Trejo-Durán, Guadalupe E.

; Alvarado-Silva, Cristina

; Castañeda-Renderos, Omar H.

; Vanoye-Carlo, Elva G.

; Flores-de la Torre, Celia

; Dueñas-González, Alfonso

; Cetina-Pérez, Lucely

Revista de investigación clínica

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aug 2020, Volume 72 N. 4 Pages 231 - 238

Abstract: En | Text: En | PDF: En

ABSTRACT Cervical cancer (CC) is one of the most common gynecological tumors and an important health problem, especially in developing countries. The vast majority of patients in early stages are cured of the disease with surgical treatment and with concomitant chemoradiotherapy in locally advanced stages. However, in patients with recurrent, persistent, or metastatic cervical CC, the effectiveness of treatment is limited, except for the combination of chemotherapy based on platinum doublets plus bevacizumab, the treatment that has achieved the best results to date. Programmed cell death-1/PD ligand-1 (PD-1/PD-L1) inhibitors could be a novel and cutting-edge therapeutic option to improve clinical outcomes in this group of patients. Thus far, there are a few Phase I/II clinical trials that have assessed the usefulness of pembrolizumab and nivolumab in this group of patients; these include the KEYNOTE 028, KEYNOTE 158, and CHECKMATE 358 trials, in which clinical benefit has been proven with PD-1/PD-L1 inhibitors in recurrent, persistent, or metastatic CC, as second-line treatment. There are also some ongoing trials that could provide further evidence on the PD-1/PD-L1 pathway as a therapeutic target in CC. In this review, we will focus on the usefulness of these PD-1/PDL1 inhibitors in CC, as well as on trials that are still in the recruitment phase, to confirm their effectiveness in this clinical setting.

https://doi.org/10.24875/ric.20000060 149 downloads

13.

Preliminary observations on the patterns of co-occurrence of Black fly (Diptera: Simuliidae) larvae and some of their potential macroinvertebrate predators
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Figueiró, Ronaldo

; Santos, Suzana Silva dos

; Docile, Tatiana Nascimento

; Costa, Tayanna Rodrigues da

; Ferreira, Christina de Albuquerque

; Gil-Azevedo, Leonardo Henrique

Revista Brasileira de Entomologia

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2020, Volume 64 N. 3 elocation e20200046

Abstract: En | Text: En | PDF: En

ABSTRACT Biotic factors such as predation, although important drivers of the black fly community, are rarely investigated in the literature. This study aimed to test the hypothesis that the patterns of co-occurrence of black fly larvae and its potential predators is not random and that there is a correlation between its frequencies and Simuliidae larvae abundances. Larvae were sampled from two localities in the Pedra Branca State Park, Rio de Janeiro, Brazil, during the dry season in june 2018. We collected Simulium pertinax Kollar, 1832, Simulium subpallidum Lutz, 1910, Simulium (Inaequalium) sp., Simulium (Psaroniocompsa) sp. and Simulium (Trichodagmia) sp. The predators families present were Perlidae, Hydropsychidae, Leptoceridae, Libellulidae and Chironomidae. The null models showed that species co-occurred significantly more than expected by chance. The canonical correlation analyses for the Vargem Grande and Pau da Fome areas area showed a significant relationship between black fly abundances and predator abundances. In Vargem Grande the abundance of Chironomidae showed a highly significant positive correlation to S. (Psaroniocompsa) sp., while Hydropsychidae was significantly correlated to Simulium sp. On the other hand, in Pau da Fome Libellulidae was significantly correlated to S. (Psaroniocompsa) sp. and Simulium sp. and Chironomidae correlated significantly to Simulium sp. The result is consistent with what would be expected of organisms that exercise mutual population regulation, although other factors than biotic interactions may be causing these patterns. However the lack of mechanistic evidences on the effect of biotic interactions on black fly populations pose a challenge on the understanding of these patterns.

https://doi.org/10.1590/1806-9665-rbent-2020-0046 898 downloads

14.

Chemical composition and in vitro antibacterial activity of essential oils from Murraya paniculata (L.) Jack (Rutaceae) ripe and unripe fruits against bacterial genera Mycobacterium and Streptococcus
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Silva, Flávia Fernanda Alves da

; Fernandes, Cassia Cristina

; Santiago, Mariana Brentini

; Martins, Carlos Henrique Gomes

; Vieira, Tatiana Manzini

; Crotti, Antônio Eduardo Miller

; Miranda, Mayker Lazaro Dantas

Brazilian Journal of Pharmaceutical Sciences

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2020, Volume 56 elocation e18371

Abstract: En | Text: En | PDF: En

This study aims to investigate chemical composition of essential oils from Murraya paniculata (L.) Jack (Rutaceae) ripe and unripe fruits and determine their in vitro antibacterial activity. Essential oils were extracted by hydrodistillation from Murraya paniculata (L.) Jack ripe and unripe fruits collected in the Cerrado, in Rio Verde, southwestern Goiás, Brazil. They were analyzed by gas chromatography with flame ionization detector (GC-FID) and by gas chromatography-mass spectrometry (GC-MS). Sesquiterpenes, which represent the most abundant class of compounds in oils, predominated in both ripe and unripe fruits. Major constituents of essential oils extracted from ripe fruits (RF-EO) were (-caryophyllene (21.3%), (-ylangene (13.3%), germacrene-D (10.9%) and (-zingiberene (9.7%) whereas the ones of unripe fruits (UF-EO) were sesquithujene (25.0%), (-zingiberene (18.2%), germacrene-D (13.1%) and (-copaene (12.7%). In vitro antibacterial activity of essential oils was evaluated in terms of its minimum inhibitory concentration (MIC) values by the broth microdilution method in 96-well microplates. Both essential oils under investigation showed moderate anti-streptococcal activity against the following bacteria: Streptococcus mutans, S. mitis, S. sanguinis, S. sobrinus and S. salivarius. MIC values ranged between 100 and 400 µg/mL. Regarding the antimycobacterial activity, essential oils from M. paniculata (L.) Jack unripe and ripe fruits were active against Mycobacterium kansasii (MIC = 250 µg/mL), moderately active against M. tuberculosis (MIC = 500 µg/mL) and inactive against M. avium (MIC = 2000 µg/mL). This study was pioneer in revealing similar chemical profiles of both essential oils extracted from Murraya paniculata (L.) Jack unripe and ripe fruits, besides describing their in vitro anti-streptococcal and antimycobacterial activities.

https://doi.org/10.1590/s2175-97902019000418371 621 downloads

15.

Chemical constituents of essential oil from Murraya paniculata leaves and its application to in vitro biological control of the fungus Sclerotinia sclerotiorum
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SILVA, Flávia Fernanda Alves da

; ALVES, Cassia Cristina Fernandes

; OLIVEIRA FILHO, Josemar Gonçalves de

; VIEIRA, Tatiana Manzini

; CROTTI, Antônio Eduardo Miller

; MIRANDA, Mayker Lazaro Dantas

Food Science and Technology

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dec 2019, Volume 39 Pages 413 - 417

Abstract: En | Text: En | PDF: En

ABSTRACT Besides their value as therapeutic resources, medicinal plants may also be used as sources of active ingredients against phytopathogens. Fungi can grow and cause spoilage in food, thus, resusting in decrease in its quality and quantity. This research aimed at evaluating the effect of essential oil from Murraya paniculata (ML-EO) leaves on mycelial growth of Sclerotinia sclerotiorum, a fungus that poses high risk to several cultures, mainly soybean. Essential oil from M. paniculata (Rutaceae) leaves was obtained by hydrodistillation which was carried out by a Clevenger-type apparatus while its chemical composition was analyzed by GC-FID and GC-MS. β-Caryophyllene (23.8%), α-zingiberene (21.0%) and β-cubebene (10.2%) were the main constituents found in ML-EO leaves. In vitro antifungal activity showed that ML-EO, at a 300 µL dose, inhibited 91.2% of mycelial growth of Sclerotinia sclerotiorum . This is the first report of the antifungal activity of ML-EO against S. sclerotiorum and results suggest that the essential oil under evaluation has good potential to control this phytopathogenic fungus.

https://doi.org/10.1590/fst.20218 506 downloads

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