Objective To construct adenovirus vector harboring CTLA4Ig-IRES2-I?B? gene for the study of enhancement blockade of T cell costimulatory pathway. Methods The IRES2 fragment was cloned in to the shuttle plasmid pAdtrack-CMV-CTLA4Ig, and then the human I?B? fragment was constructed with the link of the IRES2 to the pAdtrack-CMV-CTLA4Ig. Subsequently, adenovirus vector harboring CTLA4Ig-IRES2-I?B? was constructed by homologous recombination in E. coli BJ5183, and recombinant vector was packaged and propagated in 293 cells. Results The recombinant CTLA4Ig-IRES2-I?B? adenovirus was constructed by homologous recombination and identified by PCR and restrictive enzyme digestion methods. Conclusion The recombinant CTLA4Ig-IRES2-I?B? adenovirus may be used as a novel immunosuppressive agent for gene therapy in organ transplantation.

Objective To obtain the recombinant urease B subunit (ureB) of Helicobacter pylori (Hp) and apply it in serological detection of Hp infected patients. Methods Urease B subunit gene was amplified from the complete genome of Helicobacter pylori by PCR, and cloned into the PinPoint TM Xa Ⅲ fusion expression vector, then was sequenced. The protein of urease B subunit was expressed in E.coli JM109 and purified with affinity chromatography. 113 serum samples of peptic ulcer patients were detected by ELISA combined with purified UreB protein. Results DNA sequence analysis showed the nucleic acid sequence homology of ureB gene was 96.44% and the putative amino acid sequence homology was 99.65%. The recombinant UreB protein was composed of 571 amino acid residues and kept original immunologic reaction with corresponding antibody, and its purity was over 90% after affinity chromatography. The results of ELISA associated with recombination UreB antigen showed the sensitivity and specificity was 92%, 98.5%. Conclusion The recombinant UreB protein will be of value for clinical serodiagnosis and epidemiological study of Helicobacter pylori.

Objective To summarize the safety and efficacy of low dose of hepatitis B immunoglobulin (HBIG) for prevention of de novo hepatitis B infection after renal transplantation.MethodsThe clinical data of 138 patients who received renal transplantation without hepatitis B infection between January 2007 and June 2010 were retrospectively studied (study group).All the patients in study group were given low dose of HBIG injection before transplantation.The HBsAb titer was monitored regularly after transplantation,and the dosage of HBIG adjusted according to the level of the HBsAb titer.HBIG was implied to all patients in the study group for more than one year.The clinical data of 196 patients who received renal transplantation without hepatitis B infection between January 2004 and December 2006 served as the control group.These 196 patients were not treated with HBIG.The incidence of de novo hepatitis B infection,and acute rejection of these two groups was analyzed.The one-year graft and patients survival rate was also investigated.Results During the follow- up period of 12 months,only one case in the study group had de novo hepatitis B infection (0.7％) 6 months after renal transplantation,while 11 cases (5.6％) in the control group had de novo hepatitis B infection,in which 2 cases were died from acute hepatic failure.The incidence of de novo hepatitis B infection had statistically difference between the two groups (P＜0.05).The incidence of acute rejection in the study and control groups was 13.8％ and 17.3％ respectively (P＞0.05).The one-year graft and patient survival rate in the study and control groups was 96.4％ and 97.8％,and 90.3％ and 91.8％ respectively (P＜0.05).ConclusionLow dose of HBIG is effective and safe for prevention of de novo hepatitis B infection after renal transplantation.

Objective To evaluate the therapy effect of pneumatic lithotripsy treatment under ureteroscopic on urinary catheter encrustation(CE).Methods Eight patients with difficulty in pulling catheter tube crustcaused were enrolled as our subjects.They were performed pneumatic lithotripsy under ureteroscope operation.The information related to operation was recorded.Results Eight cases were successful in terms of crushing catheter encrustations,and the catheters were removed smoothly.Conclusion The therapy of pneumatic lithotripsy treatment under ureteroscopic is proved to be a minimally invasive treatment with small damage,and higher safety.

Objective To observe the effects of dexmedetomidine for different loading dose on blood pressure of surgery inten-sive care unit(SICU) patients conscious-sedation derivative phase .Methods 60 patients after general anaesthesia were divided into routine dose group(dexmedetomidine 1 .00 μg/kg ,group C) ,middle dose group(dexmedetomidine 0 .75 μg/kg ,group M ) and low dose group(dexmedetomidine 0 .50 μg/kg ,group L) ,and the loading time were reset 10 min .sedative effect was evaluated by Ram-say sedation score .Record the mean arterial blood pressure of everyone before administration ,5 min after ,15 min after ,30 min af-ter ,60 min after .Results All patients achieved good conscious-sedation .Compared with pro-administration ,the mean arterial blood pressure of group C descend significantly .The mean arterial blood pressure of group M and L descend significantly ,and then they were recover over time .60 min after the treatment ,the mean arterial blood pressure in group C was significantly lower than group L and goup M (P<0 .05) .Conclusion Small dose dexmedetomidine can achieved good conscious-sedation for SICU patients .It has less influence on hemodynamics .

Objective:To observe the effect of conversion from immediate-release tacrolimus (Tac) to extended-release Tac on kidney function in stable kidney transplant recipients.Methods:83 stable kidney transplant recipients who were converted from immediate-release Tac to extended-release Tac in the second people's hospital of Shanxi province from December 2011 to June 2019 were followed up for 12-36 months, and 83 stable kidney transplant recipients who continued to take immediate-release Tac were selected as control group.The changes of kidney function indexes, Tac trough concentration intra-patient variability (IPV) and compliance, the incidence of rejection and the survival rate of grafts and recipients were observed after the conversion from immediate-release Tac to extended-release Tac in stable kidney transplant recipients.Results:The conversion time from immediate-release Tac to extended-release Tac was (42.76±30.50)months after transplantation. At 24 months after conversion, the serum creatinine (SCr) was significantly lower than that before conversion ( P=0.013), and the estimated glomerular filtration rate(eGFR)was significantly higher than that before conversion( P=0.005). In the experimental group , the SCr was significantly lower than that of the control group at 36 months after conversion ( P= 0.017), eGFR was significantly higher than that of the control group ( P=0.038). In the experimental group, the score of Immunosuppressant Therapy Barrier Scale (ITBS) was (20.23±2.89) before conversion and (17.63 ±3.08) after conversion ( P= 0.000). The daily dose of Tac was (2.09 ±0.84) mg before conversion and (2.10 ±0.83) mg after conversion. The trough concentration of Tac before conversion was (7.22 ±2.84) ng/mL, which reduced significantly after conversion. No rejection occurred after conversion, and the recipients/grafts survived healthily during the follow-up period. Conclusions:After conversion from immediate-release Tac to extended-release Tac in stable kidney transplant recipients, the kidney function is stable and better than that of before conversion, the compliance is significantly improved, the IPV of Tac trough concentration is significantly reduced, and long-term use of extended-release Tac has good clinical efficacy and safety.

Caused by Helminthosporium carposaprum, tomato brown lea f spot was a serious disease in green house in Henan Province. The condition for promoting sporulation of fungi were tested in this paper. The results showed th at the number of sporulation were different on the different medium,the fungi c ould sporulate a lot on the PDA+tomato leaf and Czapek medium, but V8、PSA and t omato juice restrained sporulation.The best carbon source and nitrogen source f or the fungi promoting sporulation were fructose and ammonium chloride respectiv ely,mannitol and Peptone ammonium sulfate restrained sporulation. Light and ult raviolet radiation were in favor of sporulation , ultraviolet radiation irradiat ing for 60～80min promoted sporulation. The fungi were promoted sporulation on the condition of lower or higher temperature and alkalescence,which 15℃o r 30℃,pH 8～9.

Objective:To visually analyze the general situation and development of pre-oxygenation research abroad, and provide a reference for further development of pre-oxygenation in China.Methods:Using the WOS core data set as the data source, CiteSpace V software was used to visually analyze the literature published from January 1, 2000 to November 29, 2019.Results:The number of papers has shown a rapid upward trend since 2013, the US has the most papers. Research hotspots mainly focus on tracheal intubation, intensive care unit, apnea oxidation, non-invasive ventilation and complications.Conclusion:The United States is in the leading position in the study of pre-oxygenation, and China is still in the initial stage in the study of pre-oxygenation. We should strengthen cooperation and exchange with developed countries such as Europe and America. The application of pre-oxygenation outside the operating room and the selection of pre oxygenation tools are the direction of further research.

Objective: To investigate the role of human umbilical vein endothelial cells (HUVEC) in supporting hematopoiesis and the expansion of hematopoietic stem/progenitor cells in vitro. Methods: According to the fact that HUVEC supernatant has colony stimulating activity shown by methylcellulose colony-forming assay and HUVEC can maintain the survival of mononuclear cells for at least four weeks in vitro, CD34+ cells from umbilical cord blood were seeded with (HUVEC group) or without (control group) HUVEC monolayer. Every week cells were collected and counted, the frequency of CFU-GM was measured by using methylcellulose colony-forming assay, and the percentage of CD34+ and CD41a+ cells was measured by flow cytometry. Results: In control group，all the CD34+ cells died in two weeks. However, in HUVEC group,most nucleated cells and CD34+ cells were expanded by 68.1±14.8 fold and 6.6±1.4 fold，respectively at the third week while CFU-GM expansion reached its peak (5.7±2.1 fold) at the week 2. Moreover, the percentage of CD41a+ cells was enhanced significantly, reaching a maximum (15.6%) at the week 3. Conclusions:HUVEC can support hematopoiesis in vitro and expand the hematopoietic progenitor cells and CD41a+ cells in direct contact coculture.

Objective To analyze plague epidemic tendency in the Three-River Region of Qinghai.Methods Using retrospective study,the Three-River Region during 1954-2006 year pestis epidemic focus were investigated and analyzed.Result Pestis prevailed mainly in Yushu,Chindu,Qumalai,Nangqian,Zhiduo and the Geermu.Tanghla Township.It was first found that the nature plague focus of miefitus existed in Chengduo County.There are 1 5 kinds of 12 branches in 8 trees infected plague animals were founded,336 Yersinia pestis were separated from the driven objects.Among them there were 291 Himalayas marmot body,account for 86.60%of the total,13 of Tibet sheep,accounts for 3.87%.10 of Qinghai field-mouse,accounts for 2.98%,Also there were 114 Yersinia pestis which were separated from each kind of vector insect in vivo.And,46 pestis strains came from the axe shape of flea in vivo account for 40.35%(46/114),38 pestis strains separated from Xie mountain flea,account for 33.33% (38/114).During 1960-2006 years there were 85 human plague cases were founded,238 occurred,134 died,the case fatality rate wero 56.30%(134/238),the popular seasons were started from May to November,the peak season happened in Aug and Sep.After Oct mainly due to Tibet sheep pestis which will cause as the origin of infection.The majority of sickness was pulmonary plague,account for 49.58%(117/238),whereas the first round case caused by the gland bubonic plague,account for 77.12%(91/118).Conclusions There are two pestis strains natural epidemic focus places in Three-River Source Region of Qinghai including the Himalayas marmot pestis strain and the Qinghai field-mouse pestis strain.The case of human pestis strain causes by the marmot strain,the fiehl-mouse mold mushroom spawn causes human pestis strain has not yet discovered,Three-River Source Region of Qinghai is a pestis strain key popular area in Qinghai Province.