Objective To investigate the distribution of free Ca 2+ and characterization of Ca 2+ channel in the cultured 11～15 week human embryonic retina. Methods The cells from 11～15 week embryonic retina were dissociated enzymatically and cultured on coated cover slides. Three weeks later, Fluo3, a Ca 2+ indicator, was added in Ca 2+ containing or no Ca 2+ Hepes buffer and incubated with retinal cells for 30 min, meanwhile with or without verapamil, perdipine, or dexamethasone adding. Ca 2+ staining and Ca 2+ transit before and after 10 ?mol/L or 50 ?mol/L KCl stimulation was observed and recorded using Zeiss LM510 confocal laser scanning microscopy. Results In response to K + exposure, a rapid rise of free Ca 2+ in cytoplasma and nuclei of neuron and glial cell was observed, but was repressed with the treatment of verapamil, perdipine, or dexamethasone. The obvious Ca 2+ influx from cytoplasma into nuclei was observed even in the absence of external Ca 2+ . Conclusion L type Ca 2+ channel was expressed and functionally matured in the cultured early stage human embryonic retina.

Objective To explore the clinical causes and preventive measures of complicating ascites of mini-percutaneous nephrolithotripsy (MPCNL).Methods Retrospective analysis of 285 patients with MPCNL for upper urinary tract calculus,which were divided into ascites group and no-ascites group.Results All the procedures were successful.Ascites group of 21 cases,no-ascites group of 264 cases.Univariate analysis showed that the diameter and number of calculus,perfusion pressure,perfusion time,pressure volume of irrigation fluid,preoperative upper urinary tract infection,history of treatment associated with complicating ascites (P＜ 0.05),with age,gender,body mass index no correlation (P＞ 0.05).Logistic regression analysis showed that perfusion pressure,perfusion time,pressure volume of irrigation fluid was independent risk factors after MPCNL concurrent ascites (P ＜ 0.05).Conclusions MPCNL concurrent ascites are closely related to the large perfusion volume,the long operative perfusion time,the high perfusion pressure of irrigation fluid.On the premise of keeping the operative visual field clear,as far as possible to reduce the perfusion pressure,control irrigation fluid-flow rate,reduce the large peffusion volume.These could decrease the coincidence of the ascites.

Objective:To investigate the mechanism of endoplasmic reticulum (ER) stress-induced chemoresistance to cisplatin in gastric cancer cells. Methods:ER stress models were established in both BGC823 and SGC7901 gastric cancer cells. The expression of GRP78, an ER stress marker, was examined by Western blot analysis. Moreover, whether ER stress can decrease the sensitivity of gastric cancer cells to cisplatin and activate P38 was explored by flow cytometry and Western blot analysis, respectively. Whether ER stress-induced chemoresistance to cisplatin can be abrogated by blocking P38 activity in gastric cancer was also elucidated using flow cytometry. Results:GRP78 protein expression markedly increased after treating BGC823 and SGC7901 gastric cancer cells with tunica-mycin (TM) or thapsigargin (TG) for 8, 16, and 24 h (P<0.05), compared with that in the group treated for 0 h. The apoptotic rates of TM-(or TG)-, cisplatin-, and TM (or TG) plus cisplatin-treated groups significantly increased (P<0.05) in both BGC823 and SGC7901 gastric cancer cells compared with the rate in the control group. The apoptotic rate of TM (or TG) plus cisplatin-treated group signifi-cantly decreased (P<0.05) in both BGC823 and SGC7901 gastric cancer cells compared with that of the cisplatin-treated group. Com-pared with the group treated for 0 h, phospho-P38 expression markedly increased after treating BGC823 and SGC7901 gastric cancer cells with TM (or TG) for 8, 16, and 24 h (P<0.05). No difference in P38 protein expression was observed between each group in both BGC823 and SGC7901 gastric cancer cells (P>0.05). Both P38 inhibitors, either SB203580 or PD169316, can inhibit the activation of P38. The inhibition of P38 activity can overcome ER stress-induced chemoresistance to cisplatin in gastric cancer cells (P<0.05). Con-clusion:ER stress can trigger the chemoresistance to cisplatin by activating P38 in gastric cancer cells.

The occurrence of malignant tunors is increasing annually around the world.In every year,8.2 million patients died of malignant tumors in which about 90％ patients died of malignant tumors associated multiple organs metastases.Inhibiting tumor metastasis is the key event to prolong the survival time of patients.With the further research,tumor-vessel associated extravascular tumor metastasis is playing an increasingly important role in the clinical application.This paper summarizes the new developments of tumor-vessel associated extravascular tumor metastasis to provide possible ideas for the therapy of malignant tumors.

Objective To exPlore the effect of mammalian target of raPamycin ( mTOR ) inhibitor eVerolimus on radiosensitiVity of human non_small cell lung cancer cell line in vitro by using eVerolimus to inhibit mTOR signaling Pathway of A549. Methods Human non_small cell lung cancer cell line A549 was subjected to radiation alone or in combination with eVerolimus treatment. The 50%inhibition concentration ( IC50 ) of eVerolimus in A549 cells was detected by methylthiazol tetrazolium ( MTT) assay in vitro. EVerolimus at the 20%inhibition concentration ( IC20 ) was used to Pretreat A549 cells for 24 h. Cells were then irradiated by X_ray with 2,4,6,8 Gy. The cell surViVal fraction was comPuted by clone formation. Cell surViVal curVe was fitted by multitarget one_hit model, and mean lethal dose ( D0 ), dose quasithreshold ( Dq ), surViVal fraction at 2 Gy ( SF2 ), and sensitization enhancement ratio (SER) were calculated. The exPression ofγ_H2AX was determined by Western blotting and then the relatiVe gray Values were analyzed. Results EVerolimus significantly imProVed the sensitiVity of A549 cells to radiation. The D0 , Dq and SF2 of eVerolimus+irradiation grouP were significantly lower than those of irradiation grouP. The SER was 1. 36. The residual amount of γ_H2AX Protein in the eVerolimus + irradiation grouP was significantly higher than that of the irradiation grouP. Conclusion EVerolimus inhibiting mTOR signaling Pathway can increase the radiosensitiVity of A549 cells.

Biochemical analysis assays based on colorimetric methods using gold nanoparticles have many advantages including high sensitivity, good selectivity, naked-eyes readout and complex instruments free. These methods have good prospects in applications. The biomolecule assay is highly relative with human health. This review mainly focuses on colorimetric assays applying gold nanoparticles for biomolecules detection.

Objective To investigate the association of the Cx37 polymorphism of connexin gene with essential hyper?tension (EHT) in Xinjiang Han and Kazak population. Methods In Xinjiang region, 500 EHT patients (EHT group) were in?cluded in this study including Kazak 250 cases and Han 250 cases. Five hundred healthy volunteers (NT) were used as NT group including Kazak 250 cases and Han 250 cases. The values of age, body mass index (BMI), systolic blood pressure (SBP) and diastolic blood pressure (DBP), and other general clinical features were compared between two groups. The poly?morphism of Cx37 gene rs1630310, rs697372 and rs705193 SNP were compared between EHT and NT groups in the two eth?nic groups. Hardy-Weinberg equilibrium was used to detect the representation, and differences of genotype frequencies and gene frequency were calculated in two groups of Kazak and Han groups. Results There were significant differences in BMI, SBP, DBP, apolipoprotein ratios and homocysteine between EHT group and NT group in Kazak and Han groups (P<0.05). There were no significant differences in genotype frequencies and gene frequencies of rs705193 between EHT and NT groups (P>0.05). The differences of Kazak rs1630310 genotype and gene frequency were statistically significant (P<0.01). The frequency of Kazak rs697372 locus genotype was not significantly different (P>0.05), but the difference of gene frequen?cy was statistically significant (P<0.05). There were no significant differences in rs1630310 and rs697372 locus genotype and gene frequency in two groups of Han group. Conclusion Cx37 gene polymorphism is associated with the occurrence of EHT in Xinjiang Kazak population, which may be related with the rs1630310 and rs697372 polymorphism.

Budd-Chiari syndrome (BCS) is characterized by the hepatic outflow obstruction from the small hepatic vein to the superior hepatic inferior vena cava. Portal vein thrombosis (PVT) refers to the development of thrombosis in the main portal vein, with or without thrombosis in the superior mesenteric or splenic vein. A large number of studies have shown that prothrombin (factor II, F2) G20210A mutation is related to BCS and PVT. F2 and its G20210A mutation are introduced, the effect of F2 G20210A mutation on thrombosis is reviewed, and the prevalence of F2 G20210A mutation in China is analyzed. An attempt is made to focus on the association of F2 G20210A mutation with PVT and BCS. It is believed that F2 G20210A mutation to some extent increases the risk for PVT and BCS. However, the prevalence of F2 G20210A mutation is extremely low in the Chinese population. Thus, this mutation may not be regarded as the cause of PVT and BCS in China.

OBJECTIVE:To explore the necessity of developing therapeutic drug monitoring of vancomycin in our hospital and its existing problems,and provide a reasonable basis for the clinical rational use of vancomycin. METHODS:The cross-sectional survey was designed to collect the clinical data of 92 patients with therapeutic drug monitoring of vancomycin and statistically ana-lyze 192 cases of plasma concentration monitoring data. RESULTS:The average plasma trough concentration was (15.96 ± 8.06) mg/L;with the increase of age,the plasma trough concentration was increasing,there was no significant difference in the plasma trough concentration among different age groups (P=0.000);there were only 13 cases (6.77%) that obtained the plasma trough concentration within 30 min before the fourth dose;after using wancomycin,clearance rates of Cr and the endogenous creatinine were slightly higher than before,but there was no significant difference(P=0.722);36 cases(39.13%)showed vancomycin sus-ceptible gram positive cocci;after using wancomycin,the body temperature,white blood cell count and neutrophil percentage were lower than before,the differences were statistically significant (P=0.006,P=0.000,P=0.000);48 cases (52.17%) in treatment received initial loading dose,and only 15 cases (16.30%) did not use in combination with other anti infective drugs. CONCLU-SIONS:The results showed there are still a lot of problems in the treatment of vancomycin in our hospital,for example,the stan-dard rate of the plasma trough concentration is about 50%;most of the time of blood sampling is not reasonable;the detection rate of the pathogen is low;only about half of the cases are given the loading dose,etc. Therefore clinical pharmacists’intervention for blood sampling is an important part to promote rational drug therapy monitoring. Meanwhile,data interpretation of the monitoring results of serum drug concentration of vancomycin is a basic method for clinical pharmacists in clinical monitoring to correct the un-reasonable operations,and also the necessary measures for preventing the drug renal toxicity,it is a very important significance for the medication safety and effectiveness especially in severe infection patients,the elderly,the children and the people with renal function insufficiency.

Objective To explore the mechanisms of mesenchymal stem cells (MSC) in the treatment of concanavalin A (ConA)-induced acute immune liver injury in mice.Methods MSC were isolated and cultured from bone of the four limbs of three-week-old C57BL/6 mice.The specific surface markers were identified and osteogenic,adipogenic differentiation ability were tested.A total of 15 six to seven-week old C57BL/6 mice were divided into control group,MSC treatment group and phosphate buffer saline (PBS) treatment group,five mice in each group.The mice of MSC treatment group was injected through tail firstly with ConA and then MSC,PBS treatment group was injected through tail firstly with ConA and then PBS,control group was injected through tail with PBS twice.The mice were sacrificed in 14 to 16 hours after injection.The level of alanine aminotransferase (ALT),aspartate transaminase (AST) in peripheral blood were detected and the pathological change in liver tissue was scored by Knodell score system.Activation rate of splenic CD4+ T cells and the proportion changes of T hepler cell (Th)1,Th2,Th17 and regulatory T cells (Treg) were detected by flow cytometry and the ratio of Th17/Treg was calculated.The levels of tumor necrosis factor α (TNF-α),interferon (IFN)-γ and interleukin (IL)-4 in peripheral blood were detected by enzyme linked immunosorbent assay (ELISA).Independent-sample t test was used for comparison between groups of measurement data.Results ALT,AST and Knodell score of MSC treatment group was (174.2± 46.9) U/L,(185.6± 71.6) U/L and 3.4±1.3,respectively,which were better than those of PBS treatment group ((647.0± 118.0) U/L,(749.0± 104.0) U/L and 5.2 ±0.8,respectively),and the differences were statically significant (t =8.33,9.98 and 2.55,all P＜0.05).The activation rate of splenic CD4+ T cell of PBS treatment group was (26.10±2.17) ％,the proportion of Th1 and Th2 in CD4+ T cell was (5.81±0.79) ％ and (5.98± 1.22)％,the ratio of Th17/Treg was 0.29±0.03,the levels of TNF-α,IFN-γ and IL4 in peripheral blood were (1 281.95±88.61) U/L,(1 838.66±196.91) U/L and (1 192.36±163.94) U/L,which were higher than those of control group ((13.74±1.59)％,(1.35±0.17)％,(2.13±0.17)％,0.15± 0.05,(21.71±2.50) U/L,(11.84±1.28) U/L and (24.46±3.96) U/L),and the differences were statistically significant (t=10.26,12.37,7.02,5.30,31.79,15.93 and 20.75,all P＜0.01).There was no statistically significant difference in the activation rate of splenic CD4+T cell between MSC treatment group and PBS treatment group ((26.20±3.09)％ vs (26.10±2.17)％,P＞0.05).However,in MSC treatment group,the proportion of Th1 and Th2 in CD4+ T cell ((1.83±0.52) ％ and (2.75±1.06％)),the ratio of Th17/Treg (0.18±0.02) and the levels of TNF-α,IFN-γ and IL-4 in peripheral blood ((760.71± 73.19) U/L,(742.49±76.46) U/L and (825.76±101.74) U/L) significantly decreased compared with those of PBS treatment group,and the differences were statistically significant (t=9.45,4.48,6.41,10.14,5.56 and 10.22,all P＜0.01).There was no significant difference in the ratio of Th17/Treg between MSC treatment group and control group (P＞0.05).Conclusions The therapeutic effects of MSC on ConA induced acute immune liver injury were through influence splenic CD4+ T cell subsets by decreasing the proportion of Th1 and Th2 and then declining the levels of secreted cytokines such as TNF,IFN-γ and IL-4 in peripheral blood,increasing the proportion of Treg and decreasing the proportion of Th17 and keeping the balance of Th17/Treg.