Abstract Sodium lactate contribution on color stability of chilled beef was evaluated by proteomics analysis combined with the relative Mb content and NADH/ NAD+ ratio. The sodium lactate exhibited a remarkable efficacy against discoloration of chilled beef and showed a desirable color appearance for 6 days, while the control showed an undesirable color appearance on the 3rd day. Based on the significance analysis of protein interaction network, 12 proteins responsible for color stability of chilled beef treated by sodium lactate have been identified, which participated mainly in redox systems, metabolic enzymes, oxidoreductase, structural proteins and heat shock proteins. The proteins were correlated with NADH regeneration. Thus, we suggest that the color stability promotion may attribute to the role of in the regeneration of NADH by sodium lactate treatment.

Abstract The effect of super-chilled storage (-2 °C) on shelf life and quality of beef was investigated, compared with chilled (4 °C) and frozen (-18 °C) storage. The pH value, color, TVB-N, water-holding capacity, total viable counts (TVC) and sensory evaluation were used to evaluate the freshness, shelf life and quality of beef. These results indicated that the fresh beef stored in super-chilled condition demonstrated better pH and color stability compared to chilled storage, and exhibited better water-holding capacity and sensory score compared to frozen storage. Based on the TVB-N level and TVC, the super-chilled storage was conducive to prolong the shelf life of beef with good quality. The super-chilled storage is a good way to preserve freshness of fresh beef. In conclusion, this work provides data for the preservation of fresh beef which will benefit the meat industry.

ABSTRACT Persea americana Mill., Lauraceae, commonly known as the avocado, is native to tropical and subtropical regions, including Brazil. From the leaves of P. americana, one previously undescribed flavonol glycoside (1) together with ten known flavonoids (2-11), four megastigmane glycosides (12-15) and two lignans (16-17) were isolated. Their structures were determined by extensive spectroscopic methods including 1D- and 2D-nuclear magnetic resonance and mass spectrometry data. This is the first investigation that reports megastigmane glycoside and lignan classes within the genus Persea. All the isolated compounds have been assessed through the cell survival of larval zebrafish following neomycin-induced damage and the cell viability of a House Ear Institute-Organ of Corti 1 mouse auditory cell line. Among the tested compounds, juglanin (2) and (+)-lyoniresinol (16) showed significant cell regeneration in neomycin-damaged hair cell without cellular toxicity.

A solid-phase extraction (SPE) method based on conductive polypyrrole (PPy) nanofibers which were fabricated by electrospinning and in situ polymerization was developed. PPy nanofibers-mediated SPE followed by high performance liquid chromatography (HPLC) was used for the determination of three synthetic estrogens, namely diethylstilbestrol (DES), dienestrol (DIS), or hexestrol (HS) in milk sample. Extraction conditions including extraction nanofibers, donor solution pH and salt concentration were optimized. The target compounds were extracted from a 0.5 mL aqueous sample at pH 5.0 through PPy fibers, and then were eluted with 0.1 mL methanol. After extraction, the eluant was directly injected into an HPLC system for detection. Under the optimized extraction conditions, a large enrichment factor was achieved for three estrogens. The limit of detection (LOD) at a signal to noise ratio (S/N) of 3 ranged from 0.02 to 0.05 µg mL-1 for the estrogens in milk sample.

Resumo Fundamentos: A antraciclina gera uma disfunção ventricular esquerda progressiva associada a um prognóstico ruim. Objetivos: O propósito deste estudo foi avaliar se a análise layer específico de strain poderia avaliar disfunção ventricular esquerda subclínica após exposição a antraciclina. Métodos: Foram inscritos quarenta e dois sobreviventes tratados com antraciclina por linfoma não Hodgkin de células B grandes, de 55,83 ± 17,92 anos (grupo de quimioterapia) e 27 voluntários saudáveis, de 51,39 ± 13,40 anos (grupo controle). A dose cumulativa de epirrubicina no grupo de quimioterapia foi de 319,67 ± 71,71 mg/m2. O tempo desde a última dose de epirrubicina até o exame ecocardiográfico foi de 52,92 ± 22,32 meses. Analisaram-se o strain longitudinal global (GLS), o circunferencial (GCS) e o strain radial (GRS), os valores das camadas subendocárdica, média e subepicárdica so strain longitudinal (LS-ENDO, LS-MID, LS-EPI) e do strain circunferencial (CS-ENDO, CS-MID, CS-EPI). O gradiente de strain transmural foi calculado como a diferença no strain sistólico pico entre as camadas subendocárdicas e subepicárdicas. Um valor de p < 0,05 foi considerado significativo. Resultados: Os parâmetros convencionais da função sistólica e diastólica não mostraram diferenças significativas entre dois grupos. Comparados aos controles, os pacientes apresentaram GCS e GLS significativamente menores. A análise de speckle tracking multi-layer mostrou uma redução significativa no strain circunferencial da camada subendocárdica, o gradiente transmural CS e o strain longitudinal das três camadas. Em contraste, os dois grupos não diferiram no gradiente de strain longitudinal transmural e de strain radiais. Conclusões: Provou-se a deterioração preferencial do strain subendocárdico em sobreviventes de longa duração após exposição à antraciclina. O ecocardiograma de speckle tracking multi-layer pode facilitar o acompanhamento longitudinal dessa coorte de pacientes em risco. (Arq Bras Cardiol. 2018; 110(3):219-228)

Abstract Background: Anthracycline generates progressive left ventricular dysfunction associated with a poor prognosis. Objectives: The purpose of this study was to evaluate whether layer-specific strain analysis could assess the subclinical left ventricular dysfunction after exposure to anthracycline. Methods: Forty-two anthracycline-treated survivors of large B-cell non-Hodgkin lymphoma, aged 55.83 ± 17.92 years (chemotherapy group) and 27 healthy volunteers, aged 51.39 ± 13.40 years (control group) were enrolled. The cumulative dose of epirubicin in chemotherapy group was 319.67 ± 71.71mg/m2. The time from last dose of epirubicin to the echocardiographic examination was 52.92 ± 22.32 months. Global longitudinal (GLS), circumferential (GCS) and radial strain (GRS), subendocardial, mid and subepicardial layer of longitudinal (LS-ENDO, LS-MID, LS-EPI) and circumferential strain (CS-ENDO, CS-MID, CS-EPI) values were analyzed. Transmural strain gradient was calculated as differences in peak systolic strain between the subendocardial and subepicardial layers. A value of p < 0.05 was considered significant. Results: Conventional parameters of systolic and diastolic function showed no significant difference between two groups. Compared with controls, patients had significantly lower GCS and GLS. Multi-layer speckle tracking analysis showed significant reduction of circumferential strain of subendocardial layer, transmural CS gradient and longitudinal strain of all three layers. In contrast, the two groups did not differ in transmural longitudinal strain gradient and radial strains. Conclusions: It proved the preferential impairment of subendocardial deformation in long-term survivors after exposure to anthracycline. Multi-layer speckle tracking echocardiography might facilitate the longitudinal follow-up of this at-risk patient cohort.

RESUMO Objetivo Desenvolver um novo índice para medir a efetividade das políticas de controle do uso de álcool em indicadores selecionados de lesões relacionadas ao uso de álcool. Métodos O Sistema Global de Informação sobre Álcool e Saúde (GISAH) da Organização Mundial da Saúde (OMS) foi usado para obter dados transversais de 156 países para esta análise. Foram selecionados cinco domínios de políticas: disponibilidade física, contexto relacionado ao uso de álcool, determinação de preços, publicidade e acidentes de trânsito. A mortalidade por lesões e a fração atribuível ao álcool (FAA) para mortes por acidentes de trânsito também foram usadas para os mesmos países. Foi criado um novo indicador composto, o índice de lesões da Política Internacional de Álcool (IAPII), para avaliar a associação entre política e mortes decorrentes de lesões relacionadas ao uso de álcool. Resultados Após o controle do consumo de álcool per capita, foi verificado que as mortes por lesões e a mortalidade atribuível ao consumo de álcool apresentavam associação inversa com quatro dos cinco domínios de políticas. Os domínios foram ponderados segundo efetividade e usados para construir o IAPII, que demonstrou ter sensibilidade e especificidade aceitáveis. Os resultados da análise de regressão, após controlado o consumo de álcool, revelaram uma associação significativa do IAPII com mortalidade por acidentes de trânsito atribuível ao álcool no sexo masculino, mortalidade por acidentes de trânsito atribuível ao álcool no sexo feminino e morte decorrentes de lesões em geral (p < 0,01). Conclusões Os achados desta análise respaldam o IAPII como um indicador confiável da relação entre as políticas de álcool e mortes decorrentes de lesões: quanto mais sólida a política, menor a probabilidade de mortes por acidentes de trânsito ou em geral. Outros estudos devem avaliar a efetividade do IAPII em reduzir a morbidade por lesões relacionadas ao uso de álcool, que representa uma parcela maior da carga global da doença que a mortalidade por lesões relacionadas ao álcool.

ABSTRACT Objective To develop a new index to measure the effectiveness of alcohol control policies on selected indicators of alcohol-related injuries. Methods We used the World Health Organization Global Information System on Alcohol and Health (GISAH) for cross-sectional data from 156 countries for this analysis. Five policy domains were selected: physical availability, drinking context, pricing, advertising, and vehicular. Injury mortality and alcohol-attributable fractions (AAFs) for vehicular deaths were also used for the same countries. We created a new composite indicator, the International Alcohol Policy Injury Index (IAPII), in order to assess the association between policy and deaths due to alcohol-related injury. Results After we controlled for per-capita alcohol consumption, we found that injury deaths and AAF deaths were inversely associated with four of the five policy domains. The domains were weighted according to effectiveness and used to construct the IAPII, which produced acceptable sensitivity and specificity. Regression results, controlling for consumption, demonstrated that the IAPII was significantly associated with AAF vehicular injury death for males, AAF vehicular injury death for females, and overall injury death at p < 0.01. Conclusions Our findings support the IAPII as a reliable indicator of the relationship between alcohol policies and injury deaths: the stronger the policy, the less the likelihood of both overall and vehicular injury death. Future work should test the effectiveness of the IAPII in reducing alcohol-related injury morbidity, which accounts for a larger share of the global burden of disease than alcohol-related injury mortality does.

RESUMEN Objetivo Elaborar un nuevo índice para medir la eficacia de las políticas de control del consumo de alcohol sobre la base de indicadores seleccionados de traumatismos relacionados con el alcohol. Métodos En este análisis, utilizamos el Sistema Mundial de Información sobre el Alcohol y la Salud de la Organización Mundial de la Salud (GISAH) a fin de obtener datos transversales de 156 países. Se seleccionaron cinco ámbitos normativos: disponibilidad de bebidas alcohólicas, contexto del consumo de alcohol, precios, publicidad y conducción de vehículos. También se usaron datos de mortalidad por traumatismos y de “fracciones atribuibles al alcohol” de las defunciones causadas por el tránsito de los mismos países. Creamos un nuevo indicador compuesto, el índice internacional de políticas en materia de alcohol y traumatismos (IIPAL), a fin de evaluar la asociación entre la política y las muertes por traumatismos relacionados con el consumo de alcohol. Resultados Después de controlar la variable de consumo de alcohol per cápita, observamos que las muertes por traumatismos y las “fracciones atribuibles al alcohol” de las muertes se asociaban inversamente con cuatro de los cinco ámbitos normativos. Los ámbitos se ponderaron según la eficacia y se usaron para construir el nuevo índice, con una sensibilidad y especificidad aceptables. Los resultados de la regresión, con control del consumo de alcohol, mostraron que el índice se asociaba significativamente con la “fracción atribuible al alcohol” de muertes de hombres por traumatismos provocados por el tránsito, la “fracción atribuible al alcohol” de muertes de mujeres por traumatismos provocados por el tránsito y las muertes de personas de ambos sexos por traumatismos (p < 0,01). Conclusiones Nuestros resultados indican que el IIPAL es un indicador fiable de la relación entre las políticas en materia de alcohol y las muertes por traumatismos: cuanto más restrictiva la política, menor probabilidad de muertes por traumatismos en general y de muertes por traumatismos debidas al tránsito. Los futuros trabajos deberían verificar la eficacia de este índice para reducir la morbilidad por traumatismos relacionados con el alcohol, que constituyen una proporción mayor de la carga de enfermedad mundial que la mortalidad por traumatismos relacionados con el alcohol.

Resumo Fundamento: Apesar dos seus claros benefícios terapêuticos, a cardiotoxicidade induzida pela antraciclina é uma grande preocupação que limita a capacidade de reduzir a morbidade e mortalidade associadas com cânceres. A identificação precoce da cardiotoxicidade induzida por antraciclina é de vital importância para o equilíbrio entre o risco cardíaco e o potencial tratamento do câncer. Objetivo: Investigar se a análise por speckle-tracking pode fornecer uma medida sensível e precisa na detecção de lesão ventricular esquerda induzida por doxorrubicina. Métodos: Ratos Wistar foram divididos em 4 grupos de 8 ratos cada, e doxorrubicina foi administrada intraperitonealmente em intervalos semanais de até 4 semanas. Grupo 1: 2,5 mg/kg/semana; Grupo 2: 3 mg/kg/semana; Grupo 3: 3,5 mg/kg/semana; Grupo 4: 4 mg/kg/semana. Foram utilizados 5 ratos adicionais como controles. As imagens ecocardiográficas foram obtidas na linha basal e 1 semana após a última dose do tratamento. Foram analisados o strain radial (Srad) e circunferencial (Scirc) e as taxas de strain radial (TSrad) e circunferencial (TScirc). Após o experimento, a troponina cardíaca I (cTnI) foi analisada e as amostras cardíacas foram avaliadas histologicamente. Resultados: Após a exposição à doxorrubicina, a FEVE foi significativamente reduzida no grupo 4 (p = 0,006), mas permaneceu estável nos outros grupos. Entretanto, após o tratamento, os Srads foram reduzidos nos grupos 2, 3 e 4 (p < 0,05). A diminuição dos Srads foi correlacionada com cTnI (rho = -0,736, p = 0,000) e os escores de cardiomiopatia (rho = -0,797, p = 0,000). Conclusão: O strain radial pode fornecer um índice sensível e não-invasivo na detecção precoce da lesão miocárdica induzida pela doxorrubicina. As alterações do strain radial apresentaram correlação significativa com lesões miocárdicas e níveis séricos de troponina I cardíaca, indicando que esse parâmetro pode avaliar com precisão a gravidade da cardiotoxicidade.

Abstract Backgrounds: Despite their clear therapeutic benefits, anthracycline-induced cardiotoxicity is a major concern limiting the ability to reduce morbidity and mortality associated with cancers. The early identification of anthracycline-induced cardiotoxicity is of vital importance to assess the cardiac risk against the potential cancer treatment. Objective: To investigate whether speckle-tracking analysis can provide a sensitive and accurate measurement when detecting doxorubicin-induced left ventricular injury. Methods: Wistar rats were divided into 4 groups with 8 rats each, given doxorubicin intraperitoneally at weekly intervals for up to 4 weeks. Group 1: 2.5 mg/kg/week; group 2: 3 mg/kg/week; group 3: 3.5mg/kg/week; group 4: 4mg/kg/week. An additional 5 rats were used as controls. Echocardiographic images were obtained at baseline and 1 week after the last dose of treatment. Radial (Srad) and circumferential (Scirc) strains, radial (SRrad) and circumferential (SRcirc) strain rates were analyzed. After the experiment, cardiac troponin I (cTnI) was analyzed and the heart samples were histologically evaluated. Results: After doxorubicin exposure, LVEF was significantly reduced in group 4 (p = 0.006), but remained stable in the other groups. However, after treatment, Srads were reduced in groups 2, 3 and 4 (p all < 0.05). The decrease in Srads was correlated with cTnI (rho = -0.736, p = 0.000) and cardiomyopathy scores (rho = -0.797, p = 0.000). Conclusion: Radial strain could provide a sensitive and noninvasive index in early detection of doxorubicin-induced myocardial injury. The changes in radial strain had a significant correlation with myocardial lesions and serum cardiac troponin I levels, indicating that this parameter could accurately evaluate cardiotoxicity severity.

Polystyrene (PS) nanofibers incorporated with ion-pair (IP) reagent, e.g., sodium dodecyl sulfonate (SDSn), were developed as functional adsorbents for the solid-phase extraction (SPE) of ionic neurotransmitter such as 5-hydroxytryptamine (5-HT), prior to the determination by high performance liquid chromatography-fluorescence detection (HPLC-FLD). A comprehensive study was initiated to optimize the preconcentration step by exploring the main factors that affect the extraction/preconcentration efficiency of 5-HT, such as the composition of nanofibers, eluent and its volume, amount of adsorbent, pH and ionic strength. The validity of this method was investigated and optimal analytical performance was achieved including a wide dynamic range of 0.50-200 ng mL-1, detection limits of 0.50 ng mL–1 and precision (as RSD%) lower than 4% for both intra-day and inter-day assays. This method was then applied to the determination of 5-HT in human plasma with satisfactory results.