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Biomedical and Environmental Sciences: BES

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https://www.readbyqxmd.com/read/28494841/quercetin-attenuates-benzo-%C3%AE-pyrene-induced-cyp1a-expression
#1
M L Perepechaeva, T A Seredina, Y A Sidorova, E N Pivovarova, A L Markel, V V Lyakhovich, A Y Grishanova
We studied effects of nutrient quercetin on cytochromes' Р450 1А (CYP1A) activities (measured spectrofluorimetrically using 7-ethoxy-resorufin for CYP1A1 and 7-methoxy-resorufin for CYP1A2 as substrates), on mRNA levels (measured by RT-PCR), and on DNA-binding activities (evaluated by an electrophoretic mobility shift assay) of proteins regulating CYP1A expression in untreated and benzo(α)pyrene (BaP)-treated rats. Wistar rats received quercetin, BaP, or both once daily for 1-3 days. Quercetin did not influence CYP1A1 in untreated rats but inhibited BaP-mediated CYP1A induction on the transcriptional level decreasing positive input (AhR functional activity) and increasing negative input (AhRR/ARNT expression and Oct-1 and C/EBP functional activities)...
April 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28494840/differential-proteomics-reveals-the-potential-injury-mechanism-induced-by-heavy-ion-radiation-in-mice-ovaries
#2
Yu Xuan He, Hong Zhang, Hong Yan Li, Yong Zhang, Qi Peng Jia, Zong Shuai Li, Xing Xu Zhao
In the present study, we used a proteomics approach based on a two-dimensional electrophoresis (2-DE) reference map to investigate protein expression in the ovarian tissues of pubertal Swiss-Webster mice subjected to carbon ion radiation (CIR). Among the identified proteins, ubiquitin carboxy-terminal hydrolase L1 (UCH-L1) is associated with the cell cycle[1] and that it influences proliferation in ovarian tissues. We analyzed the expression of UCH-L1 and the proliferation marker proliferation cell nuclear antigen (PCNA) following CIR using immunoblotting and immunofluorescence...
April 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28494839/hexabromocyclododecane-induced-genotoxicity-in-cultured-human-breast-cells-through-dna-damage
#3
Rui Jing Li, Hui Gao, Guang Shui Na, Zi Hao Lu, Yao Yao, Fan Yang
To investigate the genotoxicity and reveal the potential toxicological mechanisms of Hexabromocyclododecane (HBCD), human breast cells HBL-100 were exposed to a sequence of HBCD concentrations (0, 5, 10, and 50 mg/L) for 24 h. With a series of zymology and molecular biology methods, we found that HBCD induced dose-dependent oxidative stress on HBL-100 DNA. As revealed in qRT-PCR, activated prognostic factor ATM down-regulated tumor suppressor gene BRCA1 and prompted DNA repair genes hOGG1 and hMTH1 expression in lower concentrations of HBCD (< 10 mg/L)...
April 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28494838/association-between-the-sumo4-m55v-polymorphism-and-susceptibility-to-type-2-diabetes-mellitus-a-meta-analysis
#4
Qun Zhang, Di Liu, Zhong Yao Zhao, Qi Sun, Li Xiang Ding, You Xin Wang
OBJECTIVE: The aim of this study is to determine whether the SUMO4 M55V polymorphism is associated with susceptibility to type 2 diabetes mellitus (T2DM). METHODS: A meta-analysis was performed to detect the potential association of the SUMO4 M55V polymorphism and susceptibility to T2DM under dominant, recessive, co-dominant (homogeneous and heterogeneous), and additive models. RESULTS: A total of eight articles including 10 case-control studies, with a total of 2932 cases and 2679 controls, were included in this meta-analysis...
April 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28494837/the-association-between-the-c5263t-mutation-in-the-mitochondrial-nd2-gene-and-coronary-heart-disease-among-young-chinese-han-people
#5
Guo Xin Han, Lei Xia, Shuo Shuo Li, Qin Hua Jin, Yang Song, Hong Shen, Li Li Wang, Ling Jie Kong, Tan Shi Li, Hai Yan Zhu
OBJECTIVE: This study aimed to investigate the genetic background of mitochondrial genes in young patients with Coronary heart disease (CHD) to provide a foundation for the early prevention of young patients with CHD. METHODS: 115 cases of young (⋜ 45 years) CHD Chinese Han patients (case group), 100 cases of older (> 45 years) Chinese Han CHD patients (experimental group) hospitalized and 100 cases of healthy people through physical examination (control group) at the General Hospital of PLA between January 2014 and December 2015 were selected...
April 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28494836/pulmonary-toxicity-in-rats-caused-by-exposure-to-intratracheal-instillation-of-sio2-nanoparticles
#6
Hong Yang, Qiu Yun Wu, Ming Yue Li, Can Shan Lao, Ying Jian Zhang
OBJECTIVE: The effect of the silica nanoparticles (SNs) on lungs injury in rats was investigated to evaluate the toxicity and possible mechanisms for SNs. METHODS: Male Wistar rats were instilled intratracheally with 1 mL of saline containing 6.25, 12.5, and 25.0 mg of SNs or 25.0 mg of microscale SiO2 particles suspensions for 30 d, were then sacrificed. Histopathological and ultrastructural change in lungs, and chemical components in the urine excretions were investigated by light microscope, TEM and EDS...
April 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28494835/validation-of-the-simplified-chinese-character-version-of-the-international-physical-activity-questionnaire-long-form-in-urban-community-dwelling-adults-a-cross-sectional-study-in-hangzhou-china
#7
Yan Jun Ren, Meng Su, Qing Min Liu, Ya Yun Tan, Yu Kun DU, Li Ming Li, Jun Lyu
OBJECTIVE: To assess the test-retest reliability and criterion validity of the Simplified Chinese-character version of the International Physical Activity Questionnaire Long form (IPAQ-L) in urban community-dwelling adults in Hanghzou, China. METHODS: A total of 158 eligible participants aged 25-59 years from 6 neighbourhoods in two central districts of Hangzhou completed the IPAQ-L questionnaire twice within a 7-day interval. Half of the subjects wore pedometers during the first 7 days...
April 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28494834/prediction-of-10-year-atherosclerotic-cardiovascular-disease-risk-among-adults-aged-40-79-years-in-china-a-nationally-representative-survey
#8
Mei Zhang, Yong Jiang, Li Min Wang, Yi Chong Li, Zheng Jing Huang, Jian Hong Li, Mai Geng Zhou, Wen Hua Zhao
OBJECTIVE: To establish the distribution of 10-year atherosclerotic cardiovascular disease (ASCVD) risk among Chinese adults. METHODS: We estimated the 10-year ASCVD risk by applying the 2013 American College of Cardiology/ American Heart Association pooled cohort equations (PCEs) to the data obtained from the 2010 China Chronic Disease and Risk Factor Surveillance that involved 61,541 participants (representing 520,158,652 Chinese adults) aged 40-79 years. We also compared the ASCVD risk with the 10-year ischemic cardiovascular disease (ICVD) risk, which was calculated using the simplified scoring tables recommended by the Chinese Guidelines for Prevention of Cardiovascular Diseases (Chinese model)...
April 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28494833/impact-of-smoking-status-on-lipoprotein-subfractions-data-from-an-untreated-chinese-cohort
#9
Xi Zhao, Hui Wen Zhang, Yan Zhang, Sha Li, Rui Xia Xu, Jing Sun, Cheng Gang Zhu, Na Qiong Wu, Ying Gao, Yuan Lin Guo, Geng Liu, Qian Dong, Jian Jun Li
OBJECTIVE: Cigarette smoking is one of the established risk factors of atherosclerotic cardiovascular disease, however, its impact on lipids is not completely understood, especially in the Chinese population. Therefore, this study evaluated the impact of smoking status (non, former, and current smoking) on the distribution of lipoprotein subfractions in untreated patients with angina-like chest pain. METHODS: A total of 877 patients were consecutively enrolled and divided into nonsmoking (n = 518), former smoking (n = 103), and current smoking (n = 256) groups...
April 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28427495/sexual-dysfunction-among-chinese-nurses-prevalence-and-predictors
#10
Yi Qun Yang, Qian Xu, Wei Jun Tong, Chun Lan Gao, Hong Mei Li
This study aimed to estimate the prevalence of and identify the factors influencing female sexual dysfunction (FSD) among Chinese nurses. A cross-sectional survey was conducted from March 2013 to May 2014 among 6 hospitals in Suzhou, China. In total, 2,030 married female nurses were included in the analysis. Data on the sociodemographic, lifestyle, and self-reported health status of the participants were collected, and the participants were asked to complete the Chinese version of the 19-item Female Sexual Function Index (FSFI) questionnaire...
March 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28427494/characterization-and-expression-analysis-of-peroxiredoxin-genes-in-nnk-induced-v79-cells
#11
Gui Qin Shi, Wen Shan Zhou, Meng Li, Fei Ren, Ya Wei Han
4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) is a potent and prevalent nitrosamine procarcinogen found in cigarette smoke. The aim of this work is to study alterations in peroxiredoxin (Prx) expression induced by NNK during carcinogenesis. Characterization of Prx genes from hamster was performed using bioinformatics. V79 cells were induced with different concentrations of NNK (0.1-0.4 mg/mL), and the expression levels of six Prx genes (Prx1-Prx6) were measured by qRT-PCR 24 h following NNK treatment...
March 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28427493/hair-mercury-levels-and-their-relationship-with-seafood-consumption-among-preschool-children-in-shanghai
#12
Jin Yan, Zhen Yan Gao, Ju Wang, Chong Huai Yan
Mercury is a global pollutant. Children are vulnerable to environmental toxicants. Seafood consumption is a major source of methylmercury exposure. In order to ascertain children's mercury exposure levels and study their relationship with seafood consumption, we conducted a cross-sectional study among preschool children in Shanghai. According to our data, the geometric mean of the mercury levels in children's hair was 191.9 (95% CI: 181.8, 202.4) μg/kg. These results indicate that high income may be a predictor of elevated mercury levels in children's hair...
March 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28427492/maternal-lead-exposure-induces-down-regulation-of-hippocampal-insulin-degrading-enzyme-and-nerve-growth-factor-expression-in-mouse-pups
#13
Xing Li, Ning Li, Hua Lei Sun, Jun Yin, Yu Chang Tao, Zhen Xing Mao, Zeng Li Yu, Wen Jie Li, John D Bogden
Lead exposure is a known potential risk factor for neurodegenerative diseases such as Alzheimer's disease (AD). Exposure to lead during the critical phase of brain development has been linked with mental retardation and hypophrenia in later life. This study was aimed to investigate the effects of lead exposure of pregnant mice on the expressions of insulin-degrading enzyme (IDE) and nerve growth factor (NGF) in the hippocampus of their offspring. Blood samples were collected from the tail vein, and after anesthetizing the pups, the brain was excised on postnatal day 21...
March 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28427491/identification-of-a-newly-isolated-getah-virus-in-the-china-laos-border-china
#14
Yuan Yuan Li, Shi Hong Fu, Xiao Fang Guo, Wen Wen Lei, Xiao Long Li, Jing Dong Song, Lei Cao, Xiao Yan Gao, Zhi Lyu, Ying He, Huan Yu Wang, Xiao Jie Ren, Hong Ning Zhou, Gui Qin Wang, Guo Dong Liang
In this study, we isolated a virus strain (YN12031) from specimens of Armigeres subalbatus collected in the China-Laos border. BHK-21 cells infected with YN12031 exhibited an evident cytopathic effect (CPE) 32 h post-infection. The virus particles were spherical, 70 nm in diameter, and enveloped; they also featured surface fibers. Molecular genetic analysis revealed that YN12031 was closely related to alpha viruses such as Chikungunya virus and Sindbis virus, and located in the same clade as MM2021, the prototype of Getahvirus (GETV) isolated in Malaysia in 1955...
March 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28427490/is-the-mortality-trend-of-ischemic-heart-disease-by-the-gbd2013-study-in-china-real
#15
Xia Wan, Gong Huan Yang
To determine the reason for the different mortality trends of ischemic heart disease (IHD) for China between Global Burden of Disease (GBD) 2010 and GBD2013, and to improve garbage code (GC) redistribution. All data were obtained from the disease surveillance points system, and two proportions for assigning chronic pulmonary heart disease (PHD) as GC to IHD were from GBD2010 and GBD2013, which were different for years before 2004. By using the GBD2013 approach, the age-standard mortality rate (ASMR) increased by 100...
March 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28427489/effects-of-structural-changes-in-subchondral-bone-on-articular-cartilage-in-a-beagle-dog-model
#16
Dong Yan, Tong Xi Liu, Bao Yue Liu, Ling Wang, Zhan Hua Qian, Xiao Guang Cheng, Kun Cheng Li
OBJECTIVE: Using MR T2-mapping and histopathologic score for articular cartilage to evaluate the effect of structural changes in subchondral bone on articular cartilage. METHODS: Twenty-four male Beagle dogs were randomly divided into a subchondral bone defect group (n = 12) and a bone cement group (n = 12). Models of subchondral bone defectin the medial tibial plateau and subchondral bone filled with bone cement were constructed. In all dogs, the left knee joint was used as the experimental sideand the right knee as the sham side...
March 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28427488/nr2e1-downregulation-is-involved-in-excess-retinoic-acid-induced-developmental-abnormality-in-the-mouse-brain
#17
Juan Yu, Qian Guo, Jian Bing Mu, Ting Zhang, Ren Ke Li, Jun Xie
OBJECTIVE: This study aimed to investigate the expression pattern and function of Nuclear receptor subfamily 2 group E member 1 (Nr2e1) in retinoic acid (RA)-induced brain abnormality. METHODS: The mouse model of brain abnormality was established by administering 28 mg/kg RA, and neural stem cells (NSCs) were isolated from the mouse embryo and cultured in vitro. Nr2e1 expression was detected by whole mount in situ hybridization, RT-PCR, and Western blotting. Nr2e1 function was determined by transducing Nr2e1 shRNA into NSCs, and the effect on the sonic hedgehog (Shh) signaling pathway was assessed in the cells...
March 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28427487/the-predictive-value-of-baseline-hbsag-level-and-early-response-for-hbsag-loss-in-patients-with-hbeag-positive-chronic-hepatitis-b-during-pegylated-interferon-alpha-2a-treatment
#18
Ming Hui Li, Lu Zhang, Xiao Jing Qu, Yao Lu, Gei Shen, Zhen Zhen Li, Shu Ling Wu, Ru Yu Liu, Min Chang, Lei Ping Hu, Wen Hao Hua, Shu Jing Song, Gang Wan, Yao Xie
OBJECTIVE: To explore the predictive value of baseline HBsAg level and early response for HBsAg loss in patients with HBeAg-positive chronic hepatitis B during pegylated interferon alpha-2a treatment. METHODS: A total of 121 patients with HBeAg-positive chronic hepatitis B who achieved HBsAg loss were enrolled; all patients were treated with PEG-IFNα-2a 180 μg/week. Serum HBV DNA and serological indicators (HBsAg, anti-HBs, HBeAg, and anti-HBe) were determined before and every 3 months during treatment...
March 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28427486/serum-gamma-glutamyl-transferase-levels-predict-functional-outcomes-after-aneurysmal-subarachnoid-hemorrhage
#19
Tian Xu, Wei Wang, Lin Zhai, Yun Feng Zhang, Hong Zhi Zhou, Xin Min Wu, Ai Hong Li, Li Li Xie, Xiao Jin Ning, Yu Teng Ji, Hong Mei Wang, Kai Fu Ke
OBJECTIVE: We aim to explore the potential association between serum gamma-glutamyl transferase levels and functional outcome after aneurysmal subarachnoid hemorrhage in a Chinese population. METHODS: A total of 386 aneurysmal subarachnoid hemorrhage patients were included in the study from September 2007 to February 2015. Baseline serum gamma-glutamyl transferase levels and 6-month follow-up functional outcomes were determined. A poor outcome was defined as a modified ranking scale score of ⋝ 3...
March 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28427485/gender-specific-association-of-sleep-duration-with-body-mass-index-waist-circumference-and-body-fat-in-chinese-adults
#20
Liu Xia Yan, Xiao Rong Chen, Bo Chen, Ya Min Bai, Jian Hong Li, Xin Wei Zhang, Zhong Dong, Hao Wang, Sheng Quan Mi, Wen Hua Zhao
OBJECTIVE: To examine the association between habitual sleep duration and obesity among Chinese adults. METHODS: The association of sleep duration and obesity was investigated among 7,094 community-dwelling Chinese adults. Sleep duration was self-reported. In this study, obesity was defined as follows: body mass index (BMI) ⋝ 28 kg/m2, waist circumference (WC) ⋝ 85 cm in men and ⋝ 80 cm in women, and percent body fat (%BF) ⋝ 25 in men and ⋝ 35 in women...
March 2017: Biomedical and Environmental Sciences: BES
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