Aim To investigate the expression and im-plication of HIF-1α, ROCK-2 , FoxM1 in PC12 cell in-jury induced by lead acetate. Methods PC12 cells were treated with lead acetate at the doses of 100 , 200 and 400 μmol·L-1 . The cell viability was determined by MTT reduction assay and LDH assay, the intracellu-lar production of oxygen species was measured by as-sessing SOD and MDA levels, cell apoptosis was deter-mined by Hoechst 33342 staining, the expressions of HIF-1α, ROCK-2 , FoxM1 , Bcl-2 and Bax were deter-mined by immunoblotting analysis. Results Lead ac-etate induced cell injury in PC12 cells in a dose-de-pendent manner, and it potentiated oxygen radical pro-duction and cell apoptosis. In addition, lead acetate enhanced HIF-1α and ROCK-2 expressions, increased Bax/Bcl-2 ratio and decreased FoxM1 expression. Conclusion Lead acetate can induce PC12 cell apop-tosis, which may be related with the expressions of HIF-1α, ROCK-2 and FoxM1 . Cellular oxidative stress may contribute to the injury as well.

Objective To detect the expression and clinical significance of stro-mal cell derived factor-1 (SDF-1) and CXC chemokine receptor 4 (CXCR4) in peripheral blood of patients with hepatitis C cirrhosis.Methods From January 2015 to January 2018,120 patients with hepatitis C cirrhosis in our hospital were selected as the subjects,including 60 patients with compensated hepatitis C cirrhosis and 60 patients with decompensated hepatitis C cirrhosis,and 60 hepatitis C patients without cirrhosis in the same period were selected as the control group.Enzyme linked immunosorbent assay (ELISA) was used to detect the expression levels of SDF-1 and CXCR4 in peripheral blood;the correlation between SDF-1 and CXCR4 expressions in compensated cirrhosis and decompensated cirrhosis patients was analyzed.Results The expression levels of SDF-1 and CXCR4 in peripheral blood samples of patients with decompensated cirrhosis of hepatitis C were significantly higher than those of patients with compensated cirrhosis of hepatitis C (P ＜ 0.05);the expression levels of SDF-1 and CXCR4 in peripheral blood samples of patients with compensated and decompensated cirrhosis of hepatitis C were significantly higher than those of control group (P ＜ 0.05);the expressions of SDF-1 and CXCR4 in peripheral blood of patients with compensated and decompensated cirrhosis of hepatitis C were positively correlated (r =0.684,P ＜ 0.05,r =0.765,P ＜ 0.05).Albumin (AlB) level in peripheral blood of cirrhosis group was significantly lower than that of control group (P ＜ 0.05);alanine aminotransferase (ALT),aspartate aminotransferase (AST),total bilirubin (TBIL),while fasting insulin (FINs) and interleukin (IL)-6 in cirrhosis group were higher than those of control group (P ＜ 0.05);SDF-1 level and CXCR4 level were positively correlated with AlB,FINs and IL-6 (P ＜ 0.05);multiple regression analysis showed that FINs,IL-6,SDF-1 and CXCR4 were risk factors for hepatitis C cirrhosis.Conclusions The levels of SDF-1 and CXCR4 in peripheral blood of patients with hepatitis C cirrhosis increased,and the levels of SDF-1 and CXCR4 in peripheral blood were positively correlated,suggesting that they may be involved in the regulation of the occurrence and development of hepatitis C cirrhosis.

Background and objective It has been proven that cancer stem cell existed in variety of cancer, which an significant dierence of biological characteristics was observed between the cancer stem cells and non-cancer stem cells. And CD133 is considered to be cancer stem cell marker. So there may be significant dierences in CD133- positive cells and CD133-negative cells. e aim of this study is to isolate CD133+ cells and CD133- cells from lung cancer cell line A549, ex-plore their biological characteristics and screen the metastasis-related genes. Methods MACS was applied to isolate CD133+cells and CD133- cells from human lung cancer cell line A549. To observe the formation of sphere, CD133+ cells and CD133-cells were cultured in serum-free DMEM-F12 medium (containing EGF, bFGF) in vitro. e colony formaing eciency of CD133+ cells, CD133- cells and cells without sorting was tested by colony-forming assay. e dierentiation of sphere was in-duced by culturing in DMEM-F12 medium (containing serum). e metastasis-related genes (84 genes) of CD133+ cells and CD133- cells were detected by using DNA microarray. Immunohistochemistry was used to detect the expression of CD133 protein in Human lung cancer tissue. Results CD133+ cells formed sphere in serum-free DMEM-F12 medium,while the CD133- cells failed to form sphere. e rates of CD133+ cell colony formation (57.1%) was significantly higher than that of CD133- cells (3.3%). Sphere (CD133+/CK7-) was induced to dierentiate, and CK7 expression was found in dierentiated cells. e expression levels of 19 metastasis-related genes from CD133+ cells and CD133- cells were significant dierent. Lile CD133 positive cells which distributing around the cancer nests were found in lung cancer tissue. e expression of CD133 was not related to tumor types, cell dierentiation or TNM stage. Conclusion CD133+ cells exhibit the characteristics of can-cer stem cells. e dierence of metastasis-related gene expression levels was discovered between CD133+ cells and CD133-cells. CD82 plays an important role in mechanism of tumor metastasis.

Objective:To analysis the application value of rigid ureteroscope combined with holmium laser in diagnosis and treatment of complicated hepatolithiasis guided by three-dimensional visualization technology.Methods:50 patients with complex hepatolithiasis treated in Hunan People′s Hospital from October 2016 to March 2019 were selected as the study subjects. They were divided into observation group and control group by simple random method. 20 cases underwent rigid ureteroscope combined with holmium laser under the guidance of three-dimensional visualization technology were taken as observation group, 30 cases underwent rigid ureteroscope combined with holmium laser by traditional imaging diagnosis were taken as control group. The differences between the two groups in operation time, intraoperative bleeding volume, stone residual rate, postoperative hospital stay and postoperative complications were statistically analyzed.Results:The residual rate of calculi in observation group was 10% (2/20), while it was 40% (12/30) in control group; the amount of bleeding during operation in the observation group was (170.9±18.0)ml, and it was (371.6±37.0)ml in the control group; the operation time of observation group was (179.0±14.3)minutes, and it was (340.2±24.3)minutes in the control group; the postoperative hospital stay of observation group was (8.3±1.5)days, and it was (10.1±1.8)days in the control group; postoperative biliary hemorrhage occurred in 1 cases of the observation group, biliary tract leakage occurred in 2 cases, postoperative biliary hemorrhage occurred in 3 cases of the control group, biliary tract leakage occurred in 4 cases.Conclusions:Rigid ureteroscope combined with holmium laser guided by three-dimensional visualization technology can further improve the clinical efficacy in the diagnosis and treatment of complex hepatolithiasis. which is worthy of clinical application.

【Objective】 To investigate the unqualified rate of anti-HIV detection of blood screening laboratories in Beijing-Tianjin-Hebei region, and explore the differences in anti-HIV detection ability and influencing factors in each laboratory. 【Methods】 Through filling questionnaires via e-mail, the anti-HIV ELISA unqualified rate and confirmed (WB) positive results (data) from January to December 2018 from 15 blood screening laboratories in Beijing-Tianjin-Hebei region were collected. Our laboratory was responsible for data collection and confirmation, and statistics software SPSS22.0 was used for analysis. 【Results】 1) There was a statistically significant difference among the unqualified rate of anti-HIV ELISA(6.77‱~35.71‱) and confirmed positive rate(0.60‱~3.56‱) in 15 blood screening laboratories in Beijing-Tianjin-Hebei region (P<0.05); 2) There were significant differencse among the ELISA unqualified rate and the confirmed positive rate of 8 reagents for anti-HIV detection(P<0.01), and the sensitivity of the 4th generation detection reagent and the imported reagent was higher than that of the 3rd generation reagent and the domestic reagent. The anti-HIV ELISA unqualified rate of R5 was the highest (19.08‱). 3)There were significant differences in the anti-HIV ELISA unqualified rate of R1, R2, R3, R5 and R7 reagents among different blood station laboratories(P<0.05), and there were no significant differences in the anti-HIV ELISA unqualified rate of R4, R6 and R8 reagents among different blood station laboratories(P>0.05). 4)The unqualified rate of anti-HIV ELISA of laboratories using different regents showed significant differences(P<0.05), except H, J, M. The unqualified rate of imported reagent was significantly higher than that of domestic reagents of laboratories using imported and domestic reagents combinations(P<0.05), except O. 62.5% (5/8) laboratories using domestic 3^rd and 4^th generation reagent combination showed significant differences in the unqualified rates among different reagents(P<0.05); 5) The positive rate of single-reagent(62.02%~95.45%)in 15 blood screening laboratories showed significant difference(P<0.001), and A was the lowest (62.02%). 【Conclusion】 The anti-HIV detection ability among 15 blood screening laboratories in Beijing-Tianjin-Hebei region is quite different. The application of different reagents is the main factor for the difference, and other factors such as personnel, instruments and test strategies also has a great impact on the detection of anti-HIV. It is still necessary to promote the process of homogenization of blood testing quality among blood screening laboratories in Beijing-Tianjin-Hebei region.