Objective:To establish a method for the determination of oleanolic acid in She medicine Clematis florida var. plena. Methods:The HPLC method was carried on a Lanbo-Kromasil C18 chromatography column using acetonitrile-water ( 86∶ 14 ) as the mobile phase. The detection wavelength was 205 nm, the flow rate was 1. 0 ml·min-1 , and the column temperature was 25 ℃. Re-sults:The calibration curve of oleanolic acid was linear within the range of 0. 52-15. 60μg (r=0. 999 9). The average recovery of oleanolic acid was 92. 13%(RSD=3. 0%, n=9). Conclusion:The method is simple, rapid, accurate and reproducible, which can be used as an ideal method for the quality control of She medicine Clematis florida var. plena. .

Objective To investigate the gene expression differences of hepatocellular carcinoma (HCC) cells treated with astaxanthin and to analyze its biological information. Methods After treated with astaxanthin, the total RNA of HCC cells was extracted with TRIzol reagent. Illumina Truseq^TM RNA sample Prep Kit was used for RNA-seq library construction and sequencing. We analyzed the differentially-expressed genes and function enrichments. Results Transcriptomic analysis showed that there were 39 642 566 and 497 155 920 reads in the control group and treatment group, respectively; the proportion of clean reads obtained by filtration were 94.89% and 93.56%, respectively. A total of 77 344 transcripts were detected, with 4 997 genes with significant differences in expression, among which 1 564 genes were up-regulated and 3 433 genes were down-regulated. Conclusions Astaxanthin may participate in several biological processes and signaling pathways of tumors. Significant repression of translation process by astaxanthin may result in the growth inhibition of HCC.

OBJECTIVEParticulate samples from the atmosphere in an electronic waste dismantling area were collected to investigate the levels and sources of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs).

METHODSParticulate samples including total suspended particulates (TSP) and particulate matter <2.5 μm diameter (PM(2.5)) were collected on selected non-rainy days in summer (Jul 10-12, 2006) and winter (Jan 11-13, 2007) from Fengjiang (FJ), an electronic waste (e-waste) dismantling area in eastern China, and an adjacent area Luqiao (LQ). The samples were analyzed by isotope dilution - high resolution gas chromatography / high resolution mass spectrometry (HRGC/HRMS).

RESULTSIn FJ, the mean PCDD/F concentrations (mean TEQ values) were 280.6 pg Nm(-3) (3.432 pg WHO-TEQ Nm(-3)) for the TSP samples and 223.3 pg Nm(-3) (3.180 pg WHO-TEQ Nm(-3)) for the PM(2.5) samples. The total PCDD/F concentrations and TEQs in the PM(2.5) samples were about 66.8%-108.0% of the TSP samples, indicating that the fine particles contained higher levels of PCDD/Fs than coarse particles. The PCDD/F levels in FJ were much higher than those detected in common urban areas around the world, suggesting that the study area was heavily polluted by PCDD/Fs. Furthermore, the total average daily PCDD/F intake in FJ was estimated at 62.11 pg WHO-TEQ kg(-1)·day(-1) for adults and 110.11 pg WHO-TEQ kg(-1)·day(-1) for children, which greatly exceeds the WHO (1998) tolerable daily intake of 1-4 pg of WHO-TEQ kg(-1)·day(-1).

CONCLUSIONThe PCDD/F homologues and congener profiles confirmed that the PCDD/Fs in FJ originated from crude e-waste recycling activities. The severe dioxin pollution present in FJ has also substantially influenced the adjacent area of LQ through atmospheric transport. Open burning of medical waste was another source of PCDD/Fs identified in LQ.

Air Pollutants ; chemistry ; Atmosphere ; Benzofurans ; chemistry ; China ; Dibenzofurans, Polychlorinated ; Electronic Waste ; Environmental Exposure ; Humans ; Inhalation Exposure ; Occupational Exposure ; Particulate Matter ; chemistry ; Polychlorinated Dibenzodioxins ; analogs & derivatives ; chemistry ; Refuse Disposal ; methods ; Seasons

Objective:To compare the clinical efficiency and safety between intravitreal injection of conbercept with and without macular photocoagulation for diabetic macular edema (DME).Methods:A non-random controlled study was conducted.Sixty patients (60 eyes) with DME treated in Shenzhen People's Hospital from January 2017 to January 2020 were enrolled.The patients receiving intravitreal injection of conbercept alone were divided into conbercept injection group (33 cases, 33 eyes), and those who underwent macular photocoagulation combined with intravitreal injection of conbercept were divided into combined treatment group (27 cases, 27 eyes). Best corrected visual acuity (BCVA) was examined using Early Treatment of Diabetic Retinopathy Study.The BCVA, central macular thickness (CMT) and fluorescein fundus angiography (FFA) examination were performed to observe the changes of macular edema and leakage area before and at 1, 3, 6, 9 and 12 months after treatment.The injection frequency, ocular and systemic complications were recorded.This study protocol adhered to the Declaration of Helsinki and was approved by an Ethics Committee of Shenzhen Pepole's Hospital (No.LL-YK-20170405). Written informed consent was obtained from each patient prior to any medical examination.Results:There were better mean BCVA and lower CMT at 1, 3, 6, 9 and 12 months after treatment compared with the BCVA and CMT before treatment in the two groups (all at P<0.05). At 12 months after treatment, FFA showed that the improvement rate of macular edema was 91.0% (30/33) in the conbercept injection group and 96.3% (26/27) in the combined treatment group, showing a statistically significant difference between them ( χ2=3.430, P<0.05). The injection frequency was (4.36±1.62) times in the conbercept injection group, which was significantly higher than (3.41±0.64) times in the combined treatment group ( t=9.211, P<0.05). No ocular adverse events, including ocular hypertension, endophthalmitis and retinal pigment epithelial tears or systemic complications were found during the follow-up. Conclusions:Intravitreal injection of conbercept with or without macular photocoagulation can both maintain or improve visual acuity and alleviate exudative macular edema.They both show good safety, and the combined therapy has better long-term efficacy than conbercept alone.

OBJECTIVEThis research project aimed to evaluate whether a simplified method for identifying high-risk individuals for cardiovascular diseases proposed by the China Rural Health Initiative (CRHI) was feasible in the rural areas in China.

METHODS2 036 adults, aged 20 years or older were stratified-randomly sampled from 12 villages in Luquan county and Anguo county (Hebei province) respectively, to receive physical examination and filling in administered questionnaires. "Gold Standard" was used on high risk in Chinese Guidelines on Prevention and Treatment of Dyslipidemia in Adults to evaluate the CRHI standards:people with a history of coronary heart disease or stroke, or elderly as men ≥50 years or women ≥60 years with diabetes, or elderly with systolic blood pressure ≥160 mmHg. Sensitivity, specificity, positive and negative predictive values related to the identification of high-risk individuals for cardiovascular diseases were assessed.

RESULTSThe concordance rate between the CRHI standard and the gold standard was 92.9% , with sensitivity as 77.2%, specificity as 98.5%, Youden's Index as 0.76, positive predictive value as 94.7% and negative predictive value as 92.5%. Under CRHI standard, 21.3% of the adults were identified as high risk. The rate was increasing with age (P < 0.001), reaching 44% among those who were over 60 years old.

CONCLUSIONThe CRHI standard seemed simple and easy and was suitable for identifying high-risk individuals for cardiovascular diseases in the resource-constrained rural areas.

Objective To investigate the residential radon concentration in typical areas of Hubei Province and assess the dose hazards of radon to human body. Methods According to geographical location, five cities including Wuhan, Enshi, Shiyan, Xianning and Daye were selected, and the stratified cluster sampling and monitoring were conducted in accordance with the residential building structure. From April to July, 2019, RSKS standard detectors were placed in the bedroom or living room of the tested families. After continuously sampling for three months, those detectors were returned back to the laboratory for test readings using Radosys system. Results A total of 651 detectors were deployed in 577 households of 70 communities, and 634 detectors were recovered. The recovery rate of detectors was 97.4%. The indoor residential radon concentration in Hubei Province showed a logarithmic normal distribution, with a median (25% quantile and 75% quantile) of 40.52 (29.13,64.74) Bq/m3 and an annual effective dose of 2.02 mSv. The indoor radon concentrations in Wuhan and Enshi were significantly higher than those in Shiyan, Xianning and Daye (P<0.05). The indoor radon concentrations in brick wood or civil structures were significantly higher than those in reinforced concrete structures (P<0.05), and indoor radon concentration in the first floor was significantly higher than those in other floors (P<0.05). The indoor radon concentrations after 2010 were significantly lower than those between 2001 and 2010 (P<0.05). Conclusion The number of households with indoor radon concentrations exceeding the national limit in newly-built buildings accounted for 10.1%; The indoor residential radon concentration levels of in Hubei Province were influenced by building structure, age and floor.