Resumo Os medicamentos combinados de β-lactâmicos / inibidores da lactamase (BLBLIs) são considerados uma alternativa eficaz aos carbapenêmicos. No entanto, existe uma preocupação crescente de que o aumento do uso de BLBLIs pode levar ao aumento da resistência. Este estudo determinou a associação temporal entre o consumo de BLBLI e a resistência antimicrobiana em bactérias gram-negativas. Neste estudo retrospectivo, os dados eletrônicos sobre as bactérias gram-negativas isoladas, incluindo A. baumannii, P. aeruginosa, E. coli e K. pneumoniae de pacientes internados e os resultados dos testes de suscetibilidade foram recuperados dos registros médicos do laboratório clínico. Uma regressão linear e análise de correlação cruzada foram realizadas nos dados adquiridos. Foram observadas tendências crescentes (p < 0,05) no consumo de BIBLI e carbapenem com uma mediana de uso de 27,68 e 34,46 DDD/1000 PD por trimestre, respectivamente. Foi observada uma tendência de diminuição (p = 0,023) no consumo de fluoroquinolonas com uma mediana de uso de 29,13 DDD/1000 PD por trimestre. A taxa de resistência de K. pneumoniae foi sincronizada com os consumos de BIBLI e carbapenem com coeficiente de correlação de 0,893 (p = 0,012) e 0,951 (p = 0,016), respectivamente. A análise de correlação cruzada contra o consumo de BIBLI e K. pneumoniae resistente ao meropenem atingiu o pico no intervalo de 0 quarto (r = 951, p = 0,016). Houve uma tendência de aumento no consumo de BLBLI e carbapenêmicos. A tendência crescente nas taxas de resistência a piperacilina/tazobactam, em linha com o consumo crescente de BLBLI, sugere que BLBLI deve ser usado com cautela e não pode ser considerado diretamente como alternativa de longo prazo aos carbapenêmicos.

Abstract The β-lactam/lactamase inhibitors (BLBLIs) combination drugs are considered an effective alternative to carbapenems. However, there is a growing concern that the increased use of BLBLIs may lead to increased resistance. This study determined the temporal association between the consumption of BLBLI and the antimicrobial resistance in Gram-negative bacteria. In this retrospective study, electronic data on the Gram-negative bacterial isolates, including A. baumannii, P. aeruginosa, E. coli, and K. pneumoniae from in-patients and susceptibility testing results were retrieved from the medical records of the clinical laboratory. A linear regression and cross-correlation analysis were performed on the acquired data. Increasing trends (p<0.05) in the consumption of BIBLI and carbapenem with a median use of 27.68 and 34.46 DDD/1000 PD per quarter were observed, respectively. A decreased trend (p=0.023) in the consumption of fluoroquinolones with a median use of 29.13 DDD/1000 PD per quarter was observed. The resistance rate of K. pneumoniae was synchronized with the BIBLI and carbapenem consumptions with a correlation coefficient of 0.893 (p=0.012) and 0.951 (p=0.016), respectively. The cross-correlation analysis against the consumption of BIBLI and meropenem resistant K. pneumoniae was peaked at 0-quarter lag (r=951, p=0.016). There was an increasing trend in the consumption of BLBLI and carbapenems. The increasing trend in the rates of resistance to piperacillin/tazobactam, in line with the increasing consumption of BLBLI, suggests that BLBLI has to be used with caution and cannot be directly considered as a long-term alternative to carbapenems.

Resumo Ginkgo biloba é um fitoterápico tradicional da medicina chinesa que contém vários componentes que contribuem para suas notáveis bioatividades. Variações sazonais, meteorológicos e de plantio do solo sobre os teores fitoquímicos em folhas de G. biloba, devido aos efeitos do crescimento meteorológico e parâmetros do solo, foram investigadas neste estudo. As folhas de G. biloba foram coletadas em diferentes meses e na província de Zhejiang, os teores de flavonas (quercetina, kaempferol e isorhamnetina) e lactonas terpênicas (bilobalida, ginkgolídeos A, B e C) foram quantificados por Cromatografia Líquida de Alta Eficiência (CLAE) e pelo método do detector de dispersão da luz por evaporação. Os métodos estabelecidos foram validados com boa linearidade, precisão, repetibilidade, estabilidade e recuperação. Uma análise abrangente sugeriu que o tempo de colheita adequado para G. biloba foi em outubro na província de Zhejiang. O resultado da análise de correlação com fatores meteorológicos mostra que a temperatura e a precipitação não têm efeito significativo sobre os principais componentes de G. biloba. Além disso, o tipo e composição (Mn e Zn) do solo apresentaram efeito significativo sobre o teor de flavonoides e lactonas terpênicas. Este estudo enriqueceu o conhecimento sobre o valor de desenvolvimento e utilização das folhas de G. biloba e foi útil para determinar o melhor tempo de colheita e condição de crescimento.

Abstract Ginkgo biloba is a traditional Chinese herbal medicine containing multiple components that contribute to its notable bioactivities. Variations of seasonal, meteorological and planting soil on the phytochemicals contents in G. biloba leaves due to the effects of growth meteorological and soil parameters were investigated in this study. The leaves of G. biloba were collected from different months and place in Zhejiang province, the contents of flavones (quercetin, kaempferol and isorhamnetin) and terpene lactones (bilobalide, ginkgolides A, B and C) were quantified by high performance liquid chromatography (HPLC) and the evaporative light scattering detector (ELSD) method. The established methods were validated with good linearity, precision, repeatability, stability, and recovery. Comprehensive analysis suggested the proper harvest time for G. biloba was in October of Zhejiang province. The result of correlation analysis with meteorological factors shows that the temperature and precipitation have non-significant effect on the main components of G. biloba. In addition, the type and content (Mn and Zn) of the soil showed significantly effect on the content of flavonoids and terpene lactones. This study enriched the knowledge on the development and utilization value of the G. biloba leaves and was useful for determining the optimal harvest time and growing condition.

ABSTRACT Avian leukosis virus subgroup J (ALV-J), a member of the retroviridae family, can infect both broilers and layers and induce a spectrum of different neoplasms, resulting in serious economic losses in poultry production. Epigallocatechin-3-gallate (EGCG), the major constituent of green tea, has demonstrated remarkable anti-inflammatory and cancer chemopreventive effects in many animal tumor bioassays, cell culture systems and epidemiological studies. To assess the antiviral effects of EGCG on ALV-J-induced cell apoptosis in vitro, DF-1 cells were treated with different EGCG concentrations (0, 5, 10, 20 and 40 µg/mL), and their antiviral effects were examined at different time points (0, 24, 48, 72 and 96 h) using a variety of assays. EGCG alleviated the ALV-J-induced apoptosis in a dose-dependent manner. Because high concentrations (20 and 40 µg/mL) inhibited DF-1 cell growth, and low concentration (5 µg/mL) did not suppress the ALV-J virus, 10 µg/mL was the most appropriate concentration. After 96 h of incubation, 10 µg/mL EGCG improved the ALV-J-triggered suppression of the nuclear transcription factor system by enhancing cytoplasmic NF-κB p50/p65 expression and inhibiting nuclear NF-κB p50/p65 expression, resulting in decreased cell apoptosis. These results demonstrated that EGCG inhibited ALV-J-induced apoptosis in DF-1 cells in a dose-dependent manner via the NF-κB signaling pathway, and that 10 µg/mL EGCG is the optimal concentration, which may be useful for therapeutic drug design.

Occupational noise-induced hearing loss (ONIHL) is a prevalent occupational disorder that impairs auditory function in workers exposed to prolonged noise. However, serum microRNA expression in ONIHL subjects has not yet been studied. We aimed to compare the serum microRNA expression profiles in male workers of ONIHL subjects and controls. MicroRNA microarray analysis revealed that four serum microRNAs were differentially expressed between controls (n=3) and ONIHL subjects (n=3). Among these microRNAs, three were upregulated (hsa-miR-3162-5p, hsa-miR-4484, hsa-miR-1229-5p) and one was downregulated (hsa-miR-4652-3p) in the ONIHL group (fold change >1.5 and Pbon value <0.05). Real time quantitative PCR was conducted for validation of the microRNA expression. Significantly increased serum levels of miR-1229-5p were found in ONIHL subjects compared to controls (n=10 for each group; P<0.05). A total of 659 (27.0%) genes were predicted as the target genes of miR-1229-5p. These genes were involved in various pathways, such as mitogen-activated protein kinase (MAPK) signaling pathway. Overexpression of miR-1229-5p dramatically inhibited the luciferase activity of 3′ UTR segment of MAPK1 (P<0.01). Compared to the negative control, HEK293T cells expressing miR-1229-5p mimics showed a significant decline in mRNA levels of MAPK1 (P<0.05). This preliminary study indicated that serum miR-1229-5p was significantly elevated in ONIHL subjects. Increased miR-1229-5p may participate in the pathogenesis of ONIHL through repressing MAPK1 signaling.

ABSTRACT Aquaporin 2 (AQP2) is a small protein located in the collecting tubules of kidneys; it plays an important role in the concentration and production of urine. The aim of this study was to determine the expression level of the AQP2 gene in the kidney of broiler chickens after the administration of renaldose dopamine. Broiler chickens (25 days-old) were randomly divided into two groups (n=20 per group): intravenous administration of saline solution (control group) or renal-dose dopamine (dopamine group). The expression and localization of the AQP2 gene were evaluated by real-time quantitative polymerase chain reaction (RT-qPCR) and immunohistochemistry (IHC), respectively. The protein level of AQP2 was analyzed by western blot analysis. The dopamine group presented no significant difference (p>0.05) in the biochemical criterion or mRNA expression of AQP2 compared with the control group. However, AQP2 protein level was significantly reduced (p<0.05) in the membrane of renal tubular epithelial cells. In contrast, protein level was significantly increased (p<0.05) in the cytoplasm of the dopamine group compared with the control group. Moreover, AQP2 protein was apparently more distributed and localized in the cytoplasmic vacuoles than in the membranes of the kidney in the renaldose dopamine administered chickens group. In conclusion, present findings suggest that renaldose dopamine mediates the level of AQP2 protein via shuttle from the cell membrane to the cytoplasm rather than changing the expression of AQP2 gene to adjust the secretion and absorption of water in kidney.

ABSTRACT Aim: To investigate the radiographic anatomical characters of the bones in the fractured calcaneus by using tangential X-rays. Methods: Fifty-seven patients (114 sides) with normal calcaneus and thirty patients (42 sides) with fractured calcaneus were radiographed along the line connecting the midpoint of the 4th and 5th metatarsal heads with the lateral margin of the corpus calcanei. The anatomical characters of the calcaneus on the tangential X-ray views were analysed, including radius and fractal geometry. Results: On a tangential X-ray view of the fractured calcaneus, the projection of sustentaculum tali resembled a duck beak, which was just under the middle facet of the talocalcaneal joint. The corpus calcanei appeared oval, which was just under the talocalcaneal joint articular surface. The lateral calcaneal wall did not exceed the vertical line extending from medial of the lateral malleolar fossa (the Z-W line). From the scan picture, the fractured calcaneus seemed to be widened as its lateral wall crossed the Z-W line. The longitudinal axis of this oval-shaped projection was 3.52 ± 0.41 cm (a), the horizontal axis was 2.56 ± 0.28 cm (b), and the a/b ratio was 1.40 ± 0.11. In the normal calcaneus, the a/b ratio is higher than 1.40 and the differences of the values in these two groups were significant. Therefore, the a/b ratio of the calcaneal oval-shaped projection can be used to evaluate the degree of its deformity after fracture. Conclusion: These results demonstrated that the tangential X-ray view of the calcaneus can be used to evaluate its radiographic anatomy and to measure the radii of the oval-shaped corpus calcanei.

RESUMEN Objetivo: Investigar las características anátomo-radiográficas de los huesos en el calcáneo fracturado, mediante el uso de rayos x tangenciales. Métodos: Cincuenta y siete pacientes (114 lados) con calcáneo normal y treinta pacientes (42 lados) con fractura del calcáneo fueron radiografiados a lo largo de la línea que une el punto medio de la 4ta y 5ta cabezas metatarsianas con el margen lateral del cuerpo calcáneo (corpus calcanei). Se analizaron los rasgos anatómicos del calcáneo observados en los rayos x tangenciales de rayos x, incluyendo el radio y la geometría fractal. Resultados: En la vista tangencial de la radiografía del calcáneo fracturado, la proyección del sustentaculum tali, se asemejó a un pico de pato, justamente debajo de la cara media de la articulación talocalcáne a. El cuerpo calcáneo de apariencia oval, se hallaba justo debajo de la superficie articular de la articulación talocalcánea. La pared lateral calcánea no excedía la línea vertical que se extiende desde la fosa maleolar medial a la lateral (línea Z-W). En la imagen escaneada, el calcáneo fracturado parecía haberse anchado cuando su pared lateral cruzó la línea Z-W. El eje longitudinal de esta proyección ovalada medía 3.52 ± 0.41 cm (a), el eje horizontal medía 2.56 ± 0.28 cm (b), y el cociente de a/b fue 1.40 ± 0.11. En el calcáneo normal, el cociente a/b es mayor de 1.40, y las diferencias de los valores en estos dos grupos fueron significativas. Por lo tanto, el cociente a/b de la proyección ovalada del calcáneo, puede usarse para evaluar su grado de deformidad después de la fractura. Conclusión: Estos resultados demostraron que la radiografía tangencial del calcáneo puede usarse para evaluar su anatomía radiográfica y medir los radios del cuerpo calcáneo ovalado.

During endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA), a needle is commonly used with a stylet, although recently the stylet has been omitted. This prospective study aimed to compare the quality of specimens obtained by EBUS-TBNA performed with and without a stylet. Between November 2013 and November 2014, 131 patients with lung cancer underwent EBUS-TBNA, with a total of 148 mediastinal or hilar lymph nodes sampled both with and without an inner-stylet, yielding 296 cytological specimens. Specimens were scored cytologically using five parameters: background blood or clot, amount of cellular material, degree of cellular degeneration, degree of cellular trauma, and retention of appropriate architecture. The procedure with a stylet required significantly longer operation time than without a stylet (14.5±0.8 vs 12.7±1.1 min, P<0.001). Excellent specimens were obtained in 261/296 and 260/296 samples in the procedures with and without a stylet, respectively (P=0.9), while the remaining 35 and 36 samples, respectively, were adequate. The diagnosing and staging of lung cancer using EBUS-TBNA did not differ significantly between the groups. In conclusion, specimen collection by EBUS-TBNA without a stylet is easier and faster than the procedure using a stylet and absence of a stylet did not alter specimen quality or diagnostic accuracy.

Altitude, as an important factor in the expression of terroir, may affect wine quality. We evaluated the effect of altitude and its related climatic conditions on the phenolic characteristics and antioxidant activity of red wines made from grapes originating from high-altitude areas. The content of total phenolic compounds, total flavonoids and total anthocyanins increased with altitude in Merlot (ME) and Cabernet Sauvignon (CS) wines. Cabernet Sauvignon wines showed richer tannins with increasing altitude. Merlot and CS wines from higher altitude vineyards, showed a greater antioxidant capacity. Salicylic acid, syringic acid, caffeic acid, (+)-catechin, (-)-epicatechin, and the sum of individual phenolic compounds in the wines increased with altitude based on the results of HPLC. The scores of the sensory evaluation of ME wines increased with higher altitude. The highest score was determined for CS wine originating from 2 608 m. A clear grouping of wines according to grape cultivar and vineyard altitude was observed by principal component analysis. Regression analysis showed that altitude, followed by sunshine hours, made the greatest contribution to differences in the phenolic characteristics and antioxidant activity of red wines at different sites in a high-altitude region.

This study was designed to investigate and compare the HPV prevalence, genotypes distribution and associated risk factors in rural and urban women living in Xishuang Banna district, in the province of Yunnan. A total of 177 and 190 women from rural and urban areas were engaged, respectively. HPV DNA was amplified using the L1 consensus primers system (MY09/11 and GP5/6) and HPV GenoArray test was conducted for genotyping. Proportions were compared by chi-square test, and logistic regression was used to evaluate risk factors. A total of 54 women were positive for HPV DNA. Among rural women, 23 women were positive for HPV infection, of which 21 showed a single infection and 2 had a multiple infection. HPV-16 (10/23) was the most prevalent genotype followed by HPV-52 (5/23), and HPV-58 (5/23). Urban women had a higher infection rate for overall HPV (31/54) and for multiple genotype infection (8/31). HPV-52 (9/31) was the most prevalent genotype followed by HPV-39 (7/31) and HPV-68 (5/31). The age-specific HPV prevalence was also different between rural and urban women. In urban area, women with age <35 years had the highest HPV prevalence, which declined thereafter as age advanced. However, in rural women the highest HPV prevalence was observed in an older age group (>56 years). Ethnicity, smoking and parity were significantly associated with HPV infection among urban women. Our study demonstrates that HPV prevalence and genotype distribution varies among women from rural and urban areas in the south of Yunnan.

OBJECTIVE: The goal of the present study was to assess knowledge and attitudes related to HIV/AIDS among the migrant female workers in the restaurant industry in Guangzhou City, China. METHODS: We performed a questionnaire survey using a judgmental sampling method in the health examination clinic of Yuexiu District of Guangzhou during March 2011. A total of 428 participants completed and returned the questionnaires and data were analysed by descriptive statistics, t-test, one way ANOVA, and Wilcoxon test. RESULTS: Of 428 respondents, the average score of HIV/AIDS-related knowledge was 19.6 (full marks, 26). Knowledge on HIV/AIDS among respondents was classified as poor for 8.2%, fair for 42.5%, and good for 49.3%. The average score of AIDS-related attitudes of respondents was 7.2 (full marks, 10). Most of the respondents (88.8%) had relatively positive attitudes toward AIDS. Unmarried status, ages less than 30 years old and higher levels of education had higher scores of knowledge. Among the respondents who had sex experiences, 57.7% (130/225) reported that they never or only some of the time used condom. The young, unmarried women had significantly higher proportion of condom use than those above 30 years old, and/or married ones. CONCLUSIONS: Overall, a half of respondents had only moderate and low levels of awareness about HIV/AIDS knowledge, although most of them had tolerant and positive attitudes toward HIV/AIDS. In addition, a relatively lower rate of condom use was reported. The findings indicate that there exists broad space for improvement of knowledge and behaviours toward HIV/AIDS for migrant women in China.

OBJETIVO: El objetivo del presente estudio fue evaluar los conocimientos y actitudes relacionadas con el VIH/SIDA entre las trabajadoras emigrantes en la industria de restaurantes en la ciudad de Guangzhou, China. MÉTODOS: Realizamos una encuesta en forma de cuestionario utilizando un método de muestreo a juicio en la clínica de examen de salud del distrito de Yuexiu de Guangzhou en marzo de 2011. Un total de 428 participantes llenaron y entregaron los cuestionarios, y los datos fueron analizados mediante estadísticas descriptivas, prueba t, ANOVA unidireccional, y prueba de Wilcoxon. RESULTADOS: De las 428 encuestadas, la puntuación media de los conocimientos relacionados con el VIH/SIDA fue 19.6 (puntuación máxima, 26). El conocimientos sobre el VIH/SIDA entre las encuestadas fue clasificado de pobre por el 8.2 por ciento, aceptable por el 42.5%, y bueno por el 49.3%. La puntuación promedio de las actitudes relacionadas con el SIDA entre las encuestadas fue 7.2 (puntuación máxima, 10). La mayoría de las encuestadas (88.8%) tenían actitudes relativamente positivas hacia el SIDA. El estado civil de soltero, las edades menores de 30 años, y los niveles de educación más altos, estuvieron asociados con puntuaciones más altas de conocimiento. Entre las encuestadas que tenían experiencias sexuales, el 57.7% (130/225) reportó no haber usado condones nunca, o sólo algunas veces. Las mujeres jóvenes solteras hicieron un uso del condón en proporción significativamente mayor que las mujeres mayores de 30 años, y/o las casadas. CONCLUSIONES: En general, la mitad de las encuestadas tenía sólo niveles de conciencia moderados y bajos en cuanto a conocimientos de VIH/SIDA, aunque la mayoría de ellas tenía actitudes tolerantes y positivas hacia el VIH/SIDA. Además, se reportó una tasa relativamente baja de uso del condón. Los hallazgos indican que existe un amplio espacio para mejorar tanto los conocimientos como las conductas hacia el VIH/SIDA para las mujeres emigrantes en China.