Objective:Establishing the hepatic stem cell(WB-F344)line that expresses human interleukin-2 stably and effectively.Methods: We constructed the retroviral vector Plpcx-il-2 containing human interleukin-2 gene, and transfected it into PT67 packaging cells.The infectious viruses were used to infect the hepatic stem cell WB-F344,then the puromycin resistant clones were acquired after puromycin selection.The expression of IL-2 was detected using RT-PCR,immunocytochemistry, Western blot and indirect immunofluorescence, respectively.Results: The retroviral vector containing human IL-2 gene was constructed.The titer of virus in the supernatant reached 10~5 CFU/ml after transfecting PT67 packeting cells.The puromycin resistant clones were acquired after infection of WB-F344 and the cell line WB-F344/Plpcx-IL-2 expressing human interleukin-2 stably was established.Conclusion: By retroviral-mediated transfecting human interleukin-2 gene, the hepatic stem cell stably and effectively expressing interleukin-2 are obtained.This provides a good basis for further research on immuno-gene therapy of liver cancer.

AIM: To study the effect of Salvia miltiorrhiza injection on rat atherosclerosis (AS), and elucidate the possible mechanism. METHODS: Wistar rats were fed with fat-rich diet and high dose of vitamin D_3 to induce AS, then treated with Salvia miltiorrhiza injection. Concentrations of triglyceride (TG) and total cholesterol (TC) in serum were measured by automatic serum biochemical assay. The level of ICAM-1 protein and mRNA were determined by Western blot and RT-PCR. RESULTS: Compared with the AS model group, the levels of TG and TC in serum were significantly lower in Salvia miltiorrhiza injection group (P

Objective To investigate the consumption rate of non-iodized salt,and evaluate the iodine status and goiter prevalence among school children in high water iodine areas of Henan Province from 2014 to 2015.Methods In the 20 counties with high water iodine,one township was randomly selected from each location (east,west,south,north and middle) in each county;secondly,4 villages were selected from each chosen township;thirdly,15 households were selected to collect salt samples from each chosen village.In the 10 chosen counties,one village with high water iodine was selected and water samples were collected;one school was sequentially selected from the chosen village and 100 school children aged 8-10 were chosen to collect their urine samples and measure their thyroid volume.Salt iodine was tested by semi-quantitative method;iodine contents of urine and water were tested by arsenic cerium catalytic spectrophometry;thyroid volume was measured by ultrasound method.Results In the 20 counties with high water iodine,4 440 salt samples were collected and tested both in 2014 and 2015;the rates of non-iodized salt were 98.2％ (4 363/4 440) in 2014 and 98.3％ (4 366/4 440) in 2015.In the 10 chosen counties,the median water iodine contents from the chosen villages were 202.0 μg/L in 2014 and 235.0 μg/L in 2015;970and 999 urine samples of the students from the chosen villages were collected and tested in 2014 and 2015,and the median urinary iodine contents were 251.9 μg/L in 2014 and 290.6 μg/L in 2015;937 and 948 students were examined in 2014 and 2015,the goiter rates were 3.4％ (32/937) in 2014 and 7.8％ (74/948) in 2015.Stratified by water iodine,the urinary iodine contents and goiter rates of school children increased with the rise of water iodine content.When the water iodine content exceeded 300 μg/L,goiter rate of school children was 8.4％,which was higher than other groups (P ＜ 0.05).Conclusions After stopping the supple of iodized salt in high water iodine areas,the current iodine status and goiter rate of school children are still higher than normal levels.Both noniodized salt supply and water improvement to reduce water iodine content should be taken in the areas with water iodine higher than 150 μg/L.

Objective To know the rural doctors' knowledge,belief and practice on iodine deficiency disorders(IDD),as well as their capability on health education communication in Ye County,Henan Province.Methods Semi-structured interviews were conducted among 50 rural doctors in Ye County,Henan Province.Topics covered include:sales of salt purchases,daily supervision and monitoring activities of salt,the health effects of salt,the situation of rural doctors trained,the situation of rural doctors participated in health education and related recommendations.Results ①Twenty-nine of the rural doctors knew exactly the advantage of salt iodization.②Thirty-nine of the rural doctors had taken part in the half quantitative detection of salt once or twice a year and 15 of them knew the supervision activities of salt industry department.③Forty-nine of the rural doctors believed salt iodization was beneficial to health and 48 of them were willing to participate in health education on IDD.④The major ways of their acquiring health knowledge were promotional materials [54.0％ (27/50)],TV [50.0％ (25/50)],and lecture/training [24.0％ (12/50)].⑤Thirty-seven of the rural doctors had taken part in health education on IDD.They were used to use booklets [68.0％ (34/50)],promotional slogan [36.0％ (18/50)],broadcast [24.0％ (12/50)],and doctor consultation [24.0％ (12/50)].⑥Twenty-eight of the rural doctors thought the current health education on IDD was better.They hoped to reduce the price of salt,strengthen supervision,receive more training and health education on IDD.Conclusions The rural doctors remain relatively lack of knowledge on IDD.Rural doctors have the initiative and responsibility to conduct health education on IDD,but their pattern is still a one-way propagation.

Through the sexual activity test in Drosophila melanogaster,the antistress test in mice,the influence on sexual gland development of young mice model with yang-deficiency and the Vc content of adrenal gland in rats, the kidney reinforcing and kidney-yang invigorating action of Shen'ebutin oral liquid(SBOL)was evaluated and compared with Guilinji(GLJ),a traditional tonic prescription recorded in Chinese pharmacopocia(1990 edition).The results showed that the therapeutic effects of SBOL were evident and were stronger than GLJ in some aspects.

Objective To summarize our experience in the prevention and treatment of right accessory hepatic duct and right hepatic duct injury during laparoscopic cholecystectomy. Methods The clinical data of 21 cases with right accessory hepatic duct or right hepatic duct during laparoscopic cholecystectomy were reviewed retrospectively. Result According to anatomy identified by preoperative work-up and selective cholangiography during the operation, 18 cases had the right accessory hepatic duct,eleven of them were confirmed intraoperatively. The accessory hepatic ducts were conserved in 3 cases and clipped without biliary leaks postoperativly in 7 cases; One case had biliary leaks postoperatively with the duct sutured intraoperatively, and recovered well conservative therapy. Accessory hepatic ducts were accidentally injuried in 7 cases, two patients were transferred to open surgery; three cases were confirmed to be injuried and clipped by second laparoscopic exploration because of biliary leaks postoperatively. Three cases had a low confluence of the right and left hepatic duct with the gallbladder duct joining the right bile duct, the ducts were conserved in 2 cases and injuried in one. Postoperatively all these 21 cases were followed up for 2 years, without jaundice or liver dysfunction. Conclusions To prevent injury of right accessory hepatic duct and right hepatic duct. High vigilance and familiarity with the anatomic variants of the biliary tree and intraoperative cholangiography in selective cases are fundmental.

Objective To understand the fairness of health resources of endemic diseases institutions in Henan Province,to provide evidence for endemic allocation of health resources for the government.Methods Health-related data resources in endemic disease prevention and control institutions were collected in Henan Province,including personnel,business space area,the value of equipment,and health funding,etc.The percentages of population distribution and geographical distribution of health resources were calculated; Lorenz curves of demographic fairness and geographic fairness were drawn.According to Lorenz curve (Gini coefficients of the population and the geographical distribution were calculated based on Lorenz curve),Gini coefficients were used to evaluate the fairness of the endemic disease prevention institutions for health resource allocation.Results As can be seen from Lorenz curve,the population fairness of endemic disease prevention and health personnel was the best,but the number of senior officers was less and the total value of equipment owned was low.The geographical fairness of all the indicators of health resources was poorer,and geographic fairness among senior officers was the worst.The Gini coefficient of health technical personnel,senior personnel,undergraduate or above personnel,value of equipments,area of business room and health funding allocation determined by the population distribution was less than 0.4.The health resources were relatively fair and reasonable according to the distribution of population.The Gini coefficients of all the indicators determined by the distribution of geography were higher than those determined by the distribution of population.Furthermore,the geographic Gini coefficient of senior personnel was above 0.4 which was in the vigilance state.Conclusions The equality of health resources determined by population distribution in the institutions for endemic diseases control in Henan is superior to those determined by geographic distribution.The allocations of health resources of endemic diseases control in different areas are unbalanced.

Objective To identify the species of sarcosaphagous flies by amplifying cytochrome oxidase subunitI (CO I) gene fragment,combined with morphological characteristics.Methods The DNA of sarcosaphagous flies was extacted by modified Tris balanced phenol-Tris saturated phenol protocol,the amplificationand sequencing of CO Ⅰ fragment were conducted,and the results were then compared with the database for analysis.Results The modified DNA extration method by Tris balanced phenol-Tris saturated phenol could obtain effective DNA of sarcosaphagous flies,and be applied for CO Ⅰ fragment amplification,and thus for identification of the species of sarcosaphagous flies.Conclusion The DNA extracted from sarcosaphagous flies by modified Tris balanced phenol-Tris saturated phenol protocol could be used astemplate for the amplification of CO Ⅰ fragment,and the system could identify the species of sareosaphagous flies after sequencing and alignment with the sequences of database.Compared with traditional identification methods of using morphological characteristics,the current system is more accurate and could be more widely applied.

Objective:To study the interaction between cisplatin and bovine serum albumin ( BSA) under the simulated human physiological condition. Methods:The interaction mechanism of BSA and cisplatin was investigated by fluorescent spectrometry; the binding constant, binding site and interaction force were studied, and the interaction effects on the conformation change of BSA were investigated as well. Results:The results of fluorescent spectrometry showed that a ground state complex was formed between cisplatin and BSA, and the mechanism of fluorescence quenching was static quenching. The binding parameters of cisplatin and BSA were as follows:the binding constant was 1. 36 × 104 L·mol-1 , the binding site was 0. 991, and the interaction was mainly driven by hydrogen bonds and Van Der Waals forces. The results of synchronous fluorescent spectrometry demonstrated that the interaction influenced the micro-environments of amide acid residues. Conclusion:Cisplatin can interact with BSA and change the conformation of BSA.

Objective:To understand the status of drinking water-borne endemic fluorosis in Henan Province, so as to provide scientific basis for improving prevention and control strategies.Methods:Ten counties (districts, referred to as counties) were selected from drinking water-borne endemic fluorosis areas of Henan Province in 2018. Three villages in each project county were selected according to the disease status of mild, moderate and severe conditions, and the operation status of water improvement projects, water fluoride content and dental fluorosis among children aged 8 to 12 years in each diseased village were monitored.Results:Totally 30 villages were surveyed, all of which were in the water improvement projects; a total of 25 water improvement projects were monitored, all of them were in normal operation, and the water fluoride exceeding standard rate was 28.00% (7/25), the qualified rate of water fluoride in the water improvement projects was 72.00% (18/25). Among them, 21 villages were in normal operation and the water fluoride in the water improvement projects met national standard. In which the detection rate of dental fluorosis among children aged 8 to 12 years was 36.71% (606/1 651), the index of dental fluorosis was 0.74, and the epidemic intensity was extremely mild. Water fluoride of water improvement projects in 9 villages exceeded the national standard, where the detection rate of dental fluorosis among children aged 8 to 12 years was 43.57% (261/599), the index of dental fluorosis was 0.78, and the epidemic intensity was extremely mild. The detection rate of dental fluorosis among children in the villages where the water fluoride of water improvement projects exceeded the national standard was higher than that in the villages where the water fluoride of water improvement projects met the national standard (χ 2=8.752, P < 0.01). Conclusions:The excessive fluorine content in the water of water improvement projects is still serious, and the epidemic is still severe. It is necessary to strengthen the scientific demonstration of the water improvement project construction and the project acceptance upon completion, so as to prevent unqualified projects from being put into use. We will carry out regular water quality monitoring and promptly rectify projects with water quality exceeding the standards.