Nanoemulsão fotoprotetora e processo de produção de nanoemulsão fotoprotetora

DepositadaA invenção se refere a uma nanoemulsão óleo em água fotoprotetora e antioxidante que compreende entre 10 e 25% (m/m) de compostos fotoprotetores, ao menos um antioxidante, quitosana e tensoativos não-iônicos; e ainda a invenção trata do processo de produção destas nanoemulsões

Multifunctional photoprotection: corrective makeup for cutaneous dyschromias

The aim of this study was to develop and evaluate a corrective and photoprotective makeup for patients with dyschromias. An emulsion was prepared and pigment mixtures were incorporated in the formulation, producing five shades of corrective makeup: BEIGE (I, II, III), BRONZE and TAN. The sun protection factor (SPF) and UVA/UVB ratio of the corrective makeup were determined using spectrophotometry with a Labsphere® analyser. The spreadability, occlusivity, stability, and photostability of the photoprotective formulations were also evaluated. For all formulations there was no statistical difference among them (p > 0.05) in terms of spreadability, occlusivity and SPF. They were considered to be photostable under solar radiation, with variations in SPF value and UVA/UVB ratio lower than 20%. The corrective makeup presented average-to-high UVB photoprotection and broad spectrum photoprotection. After 90 days, pH, density and SPF values showed no significant differences among formulations (p>0.05). All corrective makeup presented separation of the pigments, however, they returned to a homogeneous aspect and to the original color shade after shaking. The corrective makeup presented a fine texture, little brightness, and a homogeneous, dry-to-the-touch aspect. This work may benefit patients with dyschromias, improving their quality of life, besides promoting photoprotection and covering the skin blemishes

Development and validation of an analytical method using High Performance Liquid Chromatography (HPLC) to determine ethyl butylacetylaminopropionate in topical repellent formulations

Diseases caused by insects are frequent in poor countries, leading to epidemic scenarios in urban areas; e.g., Dengue, Zika and Chikungunya. For this reason, the development of a safe and efficient topical formulation is essential. Ethyl butylacetylaminopropionate (EB) is a mosquito repellent developed by Merck, which is used in products for adults, children and especially babies, due to its low allergenic potential. The aim of this work was to validate an analytical methodology to quantify EB in a new poloxamer-based formulation by high-performance liquid chromatography (HPLC). The quantification methodology was performed at 40 ºC using a Kromasil reverse-phase column (C18), with the dimensions of 250 x 4.6 mm. The mobile phase was acetonitrile:water (1:1) at a 1.0 mL/min flow-rate. The detector wavelength was set at 218 nm to detect EB. The methodology was considered validated since the results indicated linearity (R2>;0.99), specificity, selectivity, precision and accuracy (active recovery between 98% and 102%). It also presented limits of detection and quantification of 0.255 µg/mL and 0.849 µg/mL, respectively. The present study demonstrated the EB vehiculated in poloxamer gel is promising as a new insect repellent formulation, since it could be quantified and quality control evaluated

MUC1 aptamer-capped mesoporous silica nanoparticles for controlled drug delivery and radio-imaging applications

[EN] Mucin 1 (MUC1) is a cell surface protein overexpressed in breast cancer. Mesoporous silica nanoparticles (MSNs) loaded with safranin O, functionalized with aminopropyl groups and gated with the negatively charged MUC1 aptamer have been prepared (S1-apMUC1) for specific targeting and cargo release in tumoral versus non-tumoral cells. Confocal microscopy studies showed that the S1-apMUC1 nanoparticles were internalized in MDA-MB-231 breast cancer cells that overexpress MUC1 receptor with subsequent pore opening and cargo release. Interestingly, the MCF-10-A non-tumorigenic breast epithelial cell line that do not overexpress MUC1, showed reduced (S1-apMUC1) internalization. Negligible internalization was also found for S1-ap nanoparticles that contained a scrambled DNA sequence as gatekeeper. S2-apMUC1 nanoparticles (similar to S1-apMUC1 but loaded with doxorubicin) internalized in MDA-MB-231 cells and induced a remarkable reduction in cell viability. Moreover, S1-apMUC1 nanoparticles radio-labeled with Tc-99m (S1-apMUC1-Tc) showed a remarkable tumor targeting in in vivo studies with MDA-MB-231 tumor-bearing Balb/c mice. (C) 2017 Elsevier Inc. All rights reserved.Financial support from the Spanish Government and FEDER funds (Project MAT2015-64139-C4-1) and the Generalitat Valenciana (Project PROMETEOII/2014/047) is gratefully acknowledged.Pascual, L.; Cerqueira, C.; García-Fernández, A.; De Luis-Fernández, B.; Soares, E.; Souza, M.; Missailidis, S.... (2017). MUC1 aptamer-capped mesoporous silica nanoparticles for controlled drug delivery and radio-imaging applications. Nanomedicine Nanotechnology Biology and Medicine. 13(8):2495-2505. https://doi.org/10.1016/j.nano.2017.08.006S2495250513

Drug metabolism: Comparison of biodistribution profile of holmium in three different compositions in healthy Wistar rats

Radioisotope holmium is a candidate to be used in cancer treatment and diagnosis. There are different holmium salts and they present distinct solubility and consequently different biodistribution profiles. In this work, we aimed to evaluate the biodistribution profiles of two holmium salts (chloride and sulfate) and holmium nanoparticles (oxide) through an in vivo biodistribution assay using animal model. Samples were labeled with technetium-99m and administered in Wistar rats by retro-orbital route. Holmium chloride is highly soluble in water and it was quickly filtered by the kidneys while holmium sulfate that presents lower solubility in water was mainly found in the liver and the spleen. However, both the salts showed a similar biodistribution profile. On the other hand, holmium oxide showed a very different biodistribution profile since it seemed to interact with all organs. Due to its particle size range (approximately 100 nm) it was not intensively filtered by the kidneys being found in high quantities in many organs, for this reason its use as a nanoradiopharmaceutical could be promising in the oncology field. (C) 2016 Elsevier Ltd. All rights reserved.The authors would like to thank the National Scientific and Technological Research Council (CNPQ) (CNPq: 303594/2015-2) and the Rio de Janeiro State Research Foundation (FAPERJ) for funding.Cerqueira-Coutinho, C.; Pascual Vidal, L.; Pinto, SR.; Santos-Oliveira, R. (2016). Drug metabolism: Comparison of biodistribution profile of holmium in three different compositions in healthy Wistar rats. Applied Radiation and Isotopes. 112:27-30. https://doi.org/10.1016/j.apradiso.2016.02.015S273011

Participação da Produção da Soja na Balança Comercial: Uma Análise Comparativa a partir da Produção do Estado do Mato Grosso, no Período de 2002 a 2012.

O agronegócio é setor importante para a economia brasileira. Ele é responsável por 23% do Produto Interno Bruto (PIB) do país, o que o torna um dos principais exportadores mundiais de produtos agrícolas. Os principais produtos exportados pelo Brasil são: milho, açúcar, etanol, carne bovina, laranja (suco e fruta), café e soja em grão. Dentre essas exportações destaca-se o segmento da soja, no qual o Brasil é o segundo maior produtor mundial, atrás apenas dos Estados Unidos. Em volume, 30% das exportações brasileiras de soja são oriundas do estado do Mato Grosso. Esse trabalho tem como objetivo analisar a contribuição em termos monetários da sojicultura mato-grossense na balança comercial local e nacional. Para realizar essa análise utilizou-se como ferramentas metodológicas o Índice de Vantagem Comparativa Revelada de Vollrath (IVCRV), o Índice de Contribuição ao Saldo Comercial (ICSC) e a Taxa de Contribuição (TC). Os resultados da pesquisa mostram que o Mato Grosso possui vantagem comparativa na produção de soja em relação aos demais estados brasileiros e contribui significativamente para o saldo da balança comercial brasileira. Dessa maneira, faz-se necessário pensar em medidas que fortaleçam a competitividade da soja mato-grossense mantenha-se frente a um mercado globalizad

Development and validation of an analytical method using High Performance Liquid Chromatography (HPLC) to determine ethyl butylacetylaminopropionate in topical repellent formulations

ABSTRACT Diseases caused by insects are frequent in poor countries, leading to epidemic scenarios in urban areas; e.g., Dengue, Zika and Chikungunya. For this reason, the development of a safe and efficient topical formulation is essential. Ethyl butylacetylaminopropionate (EB) is a mosquito repellent developed by Merck, which is used in products for adults, children and especially babies, due to its low allergenic potential. The aim of this work was to validate an analytical methodology to quantify EB in a new poloxamer-based formulation by high-performance liquid chromatography (HPLC). The quantification methodology was performed at 40 ºC using a Kromasil reverse-phase column (C18), with the dimensions of 250 x 4.6 mm. The mobile phase was acetonitrile:water (1:1) at a 1.0 mL/min flow-rate. The detector wavelength was set at 218 nm to detect EB. The methodology was considered validated since the results indicated linearity (R2>0.99), specificity, selectivity, precision and accuracy (active recovery between 98% and 102%). It also presented limits of detection and quantification of 0.255 µg/mL and 0.849 µg/mL, respectively. The present study demonstrated the EB vehiculated in poloxamer gel is promising as a new insect repellent formulation, since it could be quantified and quality control evaluated