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Objective @#To investigate the characteristics and the chronic health risks of metals in fine particulate matter（PM2.5） of Wucheng District,Jinhua .@*Methods@#The PM2.5 samples were collected in Wucheng District of Jinhua from the year 2015 to 2017.Chromium(Cr), manganese (Mn),nickel(Ni),arsenic(As),selenium(Se),cadmium(Cd),antimony(Sb),lead(Pb),beryllium(Be),aluminum(Al),thallium（Tl）and mercury（Hg） were measured by inductively coupled plasma mass spectrometry（ICP-MS）. The health risks of the metals were assessed based on the standard method recommended by United States Environmental Protection Agency .@*Results@#From 2015 to 2017,the average concentration of PM2.5 in Wucheng District was（53.42±26.95）μg/m3,and the average concentration of PM2.5 in each season and each year were significantly different（P<0.05）. The median（interquartile range）concentration of metal elements in PM2.5 was 136.66（117.14）ng/m3,with higher concentration of Al,Pb,Mn,Cd and Se. From 2016 to 2017,the average concentration of Cd exceeded the reference limit（5.00 ng/m3）. The median （interquartile range） concentration of metal elements in PM2.5 in winter was 175.12（132.45）ng/m3,the highest,and in summer was 92.55（52.81）ng/m3,the lowest. The total hazard quotient（HQ）of nine kinds of metal elements in PM2.5 was 2.90;the HQ of As,Be,Ni,Se,Hg,Al,Mn and Sb were all less than 1,except Cd. The total carcinogenic risk of five kinds of metal elements in PM2.5 was more than 10-6,among which the carcinogenic risk of As and Cd were more than 10-6,and the carcinogenic risk of Be,Pb and Ni were less than 10-6 .@*Conclusion@#The concentrations of Al,Pb,Mn,Cd and Se in PM2.5 of Wucheng District were higher and the concentration of Cd exceeded the reference limit. The non-carcinogenic and carcinogenic risk of Cd were both higher,the carcinogenic risk of As was also higher.
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Objective@#To study the impact of inhalable particles（PM10）on the daily respiratory disease mortality in Jinhua,and to provide basis for health evaluation and protection for susceptible population. @*Methods@#The data of air pollutants and meteorological factors in Jinhua from 2014 to 2018 were collected. The concentrations of the air pollutants were compared with the secondary standard of GB 3095-2012 Environmental Air Quality Standard,and the seasonal distribution characteristics of PM10 were analyzed. The generalized linear models（GLM）of single pollutant and multi-pollutants were built to analyze the impact of atmospheric PM10 on the number of death from respiratory diseases. @*Results@#A total of 4 891 cases died of respiratory diseases from 2014 to 2018 in Jinhua. The median of PM10 concentration was 58 μg/m3,showing high in winter and spring but low in summer and autumn. In single pollutant models,the mortality risks of respiratory diseases of two-day lag among whole population and people aged 65 years or over increased by 1.23%（95%CI：0.27%-2.20%）and 1.24%（95%CI：0.26%-2.23%）with every increase of 10 μg/m3 in PM10. In multi-pollutants models,when introduced SO2,NO2,or SO2+NO2 with PM10,the mortality risks of respiratory diseases of two-day lag among whole population and people aged 65 years or over were higher than that in single pollutant models（P<0.05）. When introduced SO2 or SO2+NO2 with PM10,the mortality risks of respiratory diseases in males were higher than that in single pollutant models（P<0.05）.@*Conclusion@#Ambient PM10 can increase the mortality risk of respiratory diseases,especially for the elderly people aged 65 years or over.
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Objective@#To understand the health risk of drinking water in rural areas of Jinhua and to provide evidence for water sanitary management in rural areas. @*Methods@#Totally 2 032 samples of drinking water in rural areas of Jinhua were collected from 2016 to 2018. According to GB/T 5750-2006 Standard Examination Methods for Drinking Water,five chemical carcinogens（As,Cd,Cr6+,CHCl3 and CCl4）and twelve non-carcinogenic chemicals（Pb,Hg,Se、CN-、F-、NO3-、Al、Fe、Mn、Cu、Zn and NH3-N）were detected. The health risk assessment in rural drinking water was conducted by United States Environmental Protection Agency（USEPA）model. @*Results@#The total health risk,total carcinogenic risk and total non-carcinogenic risk of rural drinking water caused by the seventeen chemicals were 34.8×10-6/a,34.80×10-6/a and 6.65×10-9/a,respectively. The carcinogenic risk of five chemical carcinogens accounted for 99.98% of the total health risk,and the carcinogenic risk of Cr6+ accounted for 89.95% of the total health risk. The total health risk of the fully processed,partially processed and unprocessed water samples were 31.68×10-6/a,34.78×10-6/a and 34.77×10-6/a,respectively. The total health risk of finished water and peripheral water were 34.79×10-6/a and 34.82×10-6/a.@*Conclusion@#The health risk of drinking water in rural areas of Jinhuacaused by chemicals is low. The hexavalent chromium has the highest health risk and need more attention to be paid on.
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Objective To study the relationship of microRNA-145(miR-145) and CD44 in the hepatocellular carcinoma(HCC).Methods 13 clinical samples of HCC tissues and corresponding normal liver tissues were collected at department of General Surgery,Second Affiliated Hospital of Fujian Medical University from October 2015 to June 2016.The patients with positive expression of CD44 were studied.The expression levels of miR-145 and CD44 in HCC tissues and corresponding normal tissues were detected by real-time quantitative PCR.Western blot was performed to detect the expression of CD44 in HCC cells Hep G2 and SNU423.Biological information methods predicted whether miR-145 and CD44 have a targeted relationship.CD44 expression levels were detected after high expression of miR-145 in HCC cell line with positive expression of CD44.The vector and luciferase reporter genes were constructed to verify the interaction between miR-145 and CD44.The effects of miR-145 on proliferation in HCC cell lines with positive and negative CD44 expression were examined by tetramethylazoazole salt (MTT) assay.Results 8 of the 13 patients showed positive CD44 expression in HCC tissues.Compared with normal liver tissues,the relative expression of miR-145 in HCC tissues was significantly lower (0.998±0.010 vs.0.503±0.046,P＜0.05),and the relative expression of CD44 was higher (0.996±0.005 vs.1.878±0.108,P＜0.05).Bioinformatics suggested that miR-145 had a targeted relationship with CD44.High expression of miR-145 can significantly reduce the expression level of CD44 mRNA in HCC cell SNU423 (0.941±0.010 vs.0.515±0.021,P＜0.05) and down-regulate the expression of CD44 protein.Confirmed by luciferase reporter assay,CD44 is the target gene of miR-145.After transfection with miR-145 mimics,the proliferation of CD44 positive cell SNU423 was significantly inhibited (P＜0.05).Conclusions miR-145 can affect the proliferation of CD44 positive HCC cells by regulating the expression of CD44,which may be one of the pathogenesis of HCC.
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Objective To investigate the clinical value of detection of fluorescence quantitative PCR in detection of HBV DNA and HBV markers.Methods 653 hepatitis B patients in our hospital from 2013 April to 2013 December were selected.First ELISA method using HBV-M model for qualitative detection of the blood samples,the detection order:Hepatitis b virus surface antigen (HBsAg),Hepatitis B surface Antibody(HbsAb),Hepatitis B e Antigen(HbeAg),hepatitis Be antibody(HbeAb),hepatitis B core antibody(HbcAb);Then the FQ-PCR method for the quantitative detection of HBV-DNA,different HBV-m model test results were compared..Results Big 3 this world[1(+)、3 (+)、5 (+)model]and[1 (+)、3 (+)model ]of the HBV-DNA positive rate was 97.97%,94.74% was significantly higher than that in other mode(P<0.05).Big 3 this world[1(+)、3(+)、5(+)model]HBV-DNA expression level is the highest(5.59 ×106 ±2.42 ×105 )copies/mL was significantly higher than that in other mode(P<0.05).Conclusion Combined with qualitative and quantitative detection of HBV-DNA HBV-M,which is of great value to clinical early diagnosis and therapy.