BACKGROUND:Although the methods of mechanical scrapping,tissue block transplantation,and enzyme digestion to culture endothelial cells have been quite mature,it has been constantly updated.OBJECTIVE:To explore the culture and identification of rabbit aortic endothelial cells.METHODS:Aorta was derived from one-week-old New Zealand rabbit.Following removing the adventitia,the endothelium was digested in the mixture of 2 g/L type Ⅰ collagen,2 9/L type Ⅱ collagen,2 g/L type Ⅳ collagen,and 2 g/L type Ⅴ collagen (1:1:1:1)for 20 minutes,and the digestionwas stopped with culturemedium(1:1).Cells in the endothelium were lightly scraped to make cell suspension,which was centrifuged to precipitate cells with DMEM culture medium containing 20%fetal bovine serum,1 μg/L VEGF,2 μg/L bFGF,and 6 U/L gentamicin.The cells were then blown into single cells and the culture liquid was changed every 48 hours.The cells were passaged according to the ratio of 1:2.Inverted phase contrast microscope was used to observe cell culture;immunohistochemistry and immunofluorescence were used to determine Ⅷ-related antigen;electron microscope was used to detect Weibel-Paladed body.RESULTS AND CONCLUSION:Ⅷ-related antigen and electron microscopy confirmed that the primary and 5-passage endothelial cells were successfully cultured,suggesting that rabbit aortic endothelial cells were cultured into cell line.Ⅷ-related antigen and electron microscopy determined that a combination with W-P body was a good method to determine endothelial cells.

Thin endometrium is an important factor influencing the in vitro fertilization and embryo transfer, and there is a lack of effective therapy in the treatment of thin endometrium.The aim of this study was to explore a stable animal model of effective thin endometrium, and to promote the research on thin endometrium pathogenesis and provide experimen-tal basis of treatment.To analyze a variety of establishments of endometrial damage animal model reported in the domestic and foreign literatures,it is concluded that perfusing 95% ethanol into uterine cavities of rats can establish a rat model of thin endometrium,and put forward some experience and methods for its improvement.

OBJECTIVE To investigate the delayed cytotoxicity effect of chlorpyrifos (CPF) with?drawal on primary hippocampal neurons. METHODS Hippocampal neurons were prepared from SD rat fetuses on the 17th day of gestation. Seven days after culture,neurons were exposed to CPF 10 and 30 μmol · L-1,respectively,for 72 h or for 48 h followed by CPF withdrawal for 24 h. CCK-8 kit and neuronal nuclei(NeuN), 5-bromodeoxyuridine(BrdU) and β Ⅲ tubulin immunofluorescence expression methods were used to evaluate the cell viability. RESULTS Compared with normal control, no significant cytotoxicity was found after CPF 72 h continuous exposure. However,CPF 48 h expo?sure followed by CPF withdrawal for 24 h induced evident cytotoxicity. The amount of BrdU positive and β Ⅲ tubulin positive hippocampal neurons were both decreased significantly(P<0.05),and cell survival and viability reduced after CPF withdrawal. CONCLUSION CPF exposure withdrawal can induce more seriously delayed cytotoxicity than continuous exposure in rat primary hippocampal neurons.

Objective To explore the outpatients′experience of caring and provide references for improving their experience of medical care.Methods The phenomenology research method was adopted in this study,and twenty-one outpatients were subject to an in-depth interview to learn their outpatient experiences.Results Ten themes of experience with caring were extracted as follows:passionate and patient,careful and considerate,respect for others,offers to help,encouraging and comforting,apologies and courteously,humor,truthful considerations,conscientious and responsible,and a caring environment setup.Five themes of experience without caring were extracted as follows:impatient communication, careless seeing of outpatients,delayed service,passive reminders,and facilities without enough details. Conclusions The outpatients may have abundant experiences of caring at the outpatient clinic,also lack of caring sometimes as well.Outpatient managers should keep an eye on outpatients′needs and satisfaction of caring from time to time,to improve the quality of outpatient service.

Objective:To explore the DNA methylation patterns and methylation differential genes of patients with coal-burning-borne endemic fluorosis, and to provide a basis for study of the pathogenesis of fluoride-induced body injury.Methods:A case-control study was conducted in Shuicheng County, Liupanshui, Guizhou Province, ten patients with severe fluorosis were selected as the fluorosis group in Douqing Township, where people burning high fluorine coal in open range all year round; and ten people without fluorosis phenotype were selected as the control group in Huaga Township, where firewood was the main fuel. Peripheral blood samples were collected from the two groups of people. Reduced representation bisulfite sequencing (RRBS) technique was used to detect the whole genome DNA methylation pattern ( n = 4) and DNA differentially methylated region (DMR), the DMR differential degree (log 2Ratio) and KEGG pathway enrichment analysis were used to screen the methylation differential genes, and real-time PCR was used to verify the mRNA expression levels of the candidate methylation differential genes( n = 10). Results:The methylation pattern analysis results showed that the methylation levels of all C bases in the genome DNA of the fluorosis group and the control group were (61.53 ± 0.59)% and (62.48 ± 1.53)%, respectively; among them, the methylated levels at CG sites were (63.75 ± 0.65)%, (64.36 ± 1.01)%, at CHG sites were (13.79 ± 0.72)%, (16.69 ± 4.06)%, and at CHH sites were (25.12 ± 1.72)%, (29.77 ± 3.97)%. Compared with the control group, patients in the fluorosis group had 1 000 DMR distributed on different autosomes; and the chromosome 19 was the most with 104 segments. There were 978 DMR-related genes, including 265 hypermethylation genes and 713 hypomethylation genes; KEGG pathway enrichment analysis showed that methylation differential genes were mainly involved in cell metabolism, cancers, and phosphatidylinositol 3-kinase-protein kinase B (PI3K-AKT) and other signaling pathways; combined with the differential degree of DMR, the hypermethylated succinate dehydrogenase complex flavoprotein subunit A pseudogene 3 (SDHAP3, log 2Ratio = 3.487) and hypomethylated nuclear factor κB inhibitor kinase regulatory subunit γ (IKBKG, log 2Ratio =-4.436) were selected as the candidate genes. There were statistically significant differences in the mRNA expression levels of SDHAP3 (0.54 ± 0.08, 1.00 ± 0.00) and IKBKG (1.32 ± 0.39, 1.00 ± 0.00) between fluorosis group and control group ( F = 22.94, 15.09, P < 0.01 or < 0.05). Conclusion:There are a large number of methylation differential genes in the genomes of patients with coal-burning-borne endemic fluorosis and controls, the hypermethylated SDHAP3 and hypomethylated IKBKG may be involved in fluoride induced body injury.

Objective:To present the surgical technique and to evaluate the results of the modified ar-throscopic Latarjet procedure.Methods: Arthroscopic Latarjet procedure has proven to be a reliable method of treatment for difficult anteroinferior instability of the shoulder joint.However, there is no ante-rior capsule reattachment and too much subscapularis damage for the classic procedure.From February 2013 , we modified the classic procedure with reattachment of anterior joint capsule and muscle-tendon junction splitting of subscapularis.Coracoid graft position was evaluated using CT scanning.Results:From March 2012 to August 2014, 51 modified Latarjet procedures were successfully performed arthro-scopically for patients with anterior shoulder instability.According to the CT scanning at the final follow up, the graft was flush with the glenoid in 94.1%, and medially placed in 5.9%.Vertical positioning was perfect in 96.0%(2 to 5 o’clock), too high in 2.0%, and too low in 2.0%.There were no cases of recurrent dislocation or subluxation.Conclusion: The modified arthroscopic Latarjet procedure has shown satisfactory results with good graft positioning.It is a minimal invasive and accurate approach, which combines the advantages of the open procedure.

Objective To investigate the inhibitory effects of silencing expression ofEZH2 gene on the cell proliferation of human QBC939 cells and its mechanisms. Methods The targeting siRNA was designed and trans-fected into QBC939cells. The expressions of EZH2 mRNA and protein were detected by real-time qPCR and west-ern blotting,respectively. The ability of cellproliferationwas analyzed by MTT assay and plate clone formation assay. Cell apoptosis and cycle percentage weremeasured by flow cytometry. Cell senescence was assessed byβ-galactosi-dase dyeing.The expressions of H3K27me3,P14ARF,P16INK4a,P53,P21 and E2F1 proteinwere determined by West-ern blotting.Results Compared with the control group ,the expressions of mRNAand protein were significantly elevat-ed in experimental group. The ability of cellproliferation in the experiment group was significantly down regulated , which could also cause a rise of G1/S phase ,but not a marked variation of apoptosis rate. Silencing EZH2 would induce a obvious senescence phenotype in QBC939 cells. EZH2-siRNA transferredcould also down-regulate the expressions of H3K27me3 and E2F1 protein,while up-regulating the expressions of P14ARF,P16INK4a,P53 and P21 protein in QBC939 cells.Conclusions Silencing EZH2 could induce a significant inhibition on cell proliferation of QBC939 cells,the mechanism of which may be associated with the senescence pathway regulation.

Objective To explore the methods of the standardized management used in humanistic nursing care and to assess its effects.Methods Measures of the standardized management began to be used in such care at the hospital since January 2013.Questionnaires of patient satisfaction with nursing care for inpatients and those discharged were used to assess the effects of the standardized management measures periodically and synthetically.Results The patient satisfaction with humanistic nursing care keeps increasing year by year from 2013 to 201 5.The differences among three sets of data are statistically significant(P < 0.05 ).Conclusions Humanistic nursing care calls for promotion of standardized management.It is high time to build such a standardized management system at the hospitals.

Objective To compare the clinical outcomes of two D3 embryo and single blastocyst transfer in patients retrieving different oocytes, so as to provide data support for selecting a clinical transfer strategy. Methods We made a retrospective analysis of patients who underwent in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI)between January and December 2014 in the Reproductive Medicine Center,the Third Affiliated Hospital of Zhengzhou University.The patients were divided into three groups according to the number of oocytes received:Group A (5-9 oocytes),Group B (10 - 14 oocytes)and Group C (≥ 1 5 oocytes).Patients in each group all received four different transfer methods as follows:transfer of two fresh D3 embryos (a ),transfer of one fresh blastocyst (b ),transfer of two D3 frozen embryos (c ),and transfer of one frozen blastocyst (d ).We compared the 2PN fertilization rate of oocytes,rate of available embryos and rate of good embryos among the three groups.We also compared the embryo implantation rate,biochemical pregnancy rate,clinical pregnancy rate, multiplets rate and abortion rate among the four transfer methods in each group.Results ① There were 667, 573,and 479 transfer cycles in Group A,Group B and Group C,respectively.The 2PN fertilization rate of IVF and available embryos rate was significantly higher in Group A than in Group B and Group C (P =0.003/P <0.001).② There was no significant difference in biochemical pregnancy rate,clinical pregnancy rate or abortion rate with the four transfer methods in Group A (P >0.05),but the implantation rate of c was significantly lower than that of a and d (P =0.027/0.020),d had a higher implantation rate than a and c in Group B (P =0.005/0.001).In Group C,the biochemical pregnancy rate and clinical pregnancy rate of d were significantly higher than those of a (P =0.048/0.027)and c (P =0.003/0.001).Patients in Group C also had a higher implantation rate than D3 embryos (P <0.05).③ The multiple pregnancy rate of single blastocyst transfer decreased compared with D3 embryos transfer in the three groups (P <0.05).Conclusion Single blastocyst transfer has both higher implantation rate and lower multiple pregnancy rate in high response patients (1 5 or more oocytes received).For patients who received 5-9 and 10-14 oocytes,D3 embryos have a similar clinical pregnancy rate with that of single blastocyst but a higher multiple pregnancy rate.Single vitrified-warmed blastocyst transfer has a higher clinical pregnancy rate.It is the best transfer method for patients who received more than 10 oocytes.