Objective To analyze the performance of adsorbing CO2 with zeolite 5A molecular sieve in crew module. Methods Fitting analysis was based on experimental data of adsorbing CO2,O2 and N2 with zeolite 5A molecular sieve and the suitability of isotherm adsorbing equation of Langmuir,Freundlich and BET models to be conducted with Origin software. Then using obtained equations and competitive adsorbing theory,the adsorbed amounts of these three kinds of gas under competitive condition were calculated. Results The constants in equations for adsorbing CO2,O2 and N2 with zeolite 5A molecular sieve were determined,and adsorbed amounts for above three kinds of gases under competitive condition were calculated. Conclusion The adsorbed CO2 amount is affected by high fraction of N2. Therefore zeolite 5A molecular sieve should be modified technically so that its adsorption in N2 might be reduced to an ignored amount.

Objective To observe the effect of the rivaroxaban and low molecular weight heparin calcium to prevent deep vein thrombosis (DVT) after artificial joint replacement. Methods 167 patients included 114 cases for total hip arthroplasty and 53 cases for total knee replacement from Novermber, 2009 to October, 2010 were divided into two groups: observation group (n=84) was treated with rivaroxaban tablets, 6 h after surgery, 10 mg/d, 2 weeks for knee arthroplasty, 5 weeks for total hip arthroplasty; and control group (n=83) was treated with low molecular weight heparin calcium 2500 IU 2 h before and after surgery for 5 d. Ultrasonography was used to detect the deep vein lumen size change and DVT rate of bilateral lower extremities in all patients before and after surgery. Activated partial thromboplastin time (APTT) was tested before surgery, and 2 d, 5 d, 7 d, 14 d, 35 d after surgery. Results ① Incidence of DVT showed that there were 9 cases (10.7%) with DVT in the observation group; there were 15 cases with DVT (18.1%) in the control group. ② Lower limb deep vein lumen size change comparison: there were 23 cases (27.4%) with superficial femoral vein stenosis more than 2 mm in the observation group while 38 cases (45.8%) in the control group, there were 27 cases (32.1%) with popliteal veins stenosis more than 2 mm in the observation group and 47 cases (56.6%) in the control group (P<0.01). ③APTT: APTT prolonged >10 s was 0 in the observation group while 23 cases (27.7%) in the control group (P<0.01). Conclusion Trivaroxaban may prevent DVT after artificial joint replacement and be better than low molecular weight heparins calcium.

Objective To construct eukaryotic cell expression vector of human frangible histone triad (FHIT) gene. Methods A 456 bp cDNA fragment was amplified from the total RNA of normal human thyroid tissue by RT PCR method and cloned into plasmid pcDNA3. The cloned insert was identified by double digestion of the recombinant plasmid with restriction enzymes Kpn Ⅰ and Bst XⅠ and sequenced by Sanger dideoxy mediated chain termination. The expression of FHIT gene was detected by immunocytochemical methods. Results The results showed that the cDNA fragment included 456 bp entire coding region. The recombinant eukaryotic cell expression vector of pcDNA3 FHIT was constructed, and the sequence of the insert was identical to the published sequence. MM96L cells transfected with the pcDNA3 FHIT plasmid expressed high level of Fhit protein in cytoplasm. Conclusion The recombinant plasmid pcDNA3 FHIT can provide a strong molecular tool for the studies of neoplasm pathogenesis.

Objective To observe the clinical effect of mouse nerve growth factor on protrusion of the lumbar intervertebral disc (LDP) treated with operation. Methods 60 cases with LDP received posterior lamina resection nucleus pulposus decompression excise pedicle screws fixation, in which 30 cases (the treatment group) accepted mouse nerve growth factor for 30 d. Their symptoms and signs, visual analogue score (VAS) for pain, and the electromyogram were recorded before and after treatment. Results The VAS in the treatment group improved more than in control group (P<0.05). the incidence of cure and improvement (76.7%) was higher than in the control group (50.0%)(P<0.05). The nerve conduction velocity and action potential of main muscle group also improved more in the treatment group (P<0.05).Conclusion Mouse nerve growth factor can improve the recovery of pain as well as the neural function in patients after operation for LDP.

Objective To investigate the effect of the exogenous fragile hisdidine triad(FHIT) gene on the proliferation and the apoptosis of cutaneous carcinoma cell line A431,and to explore the mechanism of tumor suppression by the FHIT gene.Methods The plasmids pcDNA3-FHIT and pcDNA3-vector were transfected into the cutaneous carcinoma cell line A431 without FHIT gene expression,and then the transfected cells were screened by G418 and the expression of FHIT was determined by the immunocytochemical staining technique.The effect of FHIT on the growth characteristics of cutaneous carcinoma cell line A431 was observed by MTT,colony forming test and flow cytometry.Results Stable FHIT gene expressing A431 cells were produced,the proliferation activity and colony forming capability of A431FHIT were suppressed,whereas the apoptosis was increased.All these differences between A431-FHIT cells and the two control groups of cutaneous carcinoma cells had statistical significance.Conclusion Transfecting the exogenous FHIT gene into cutaneous carcinoma cells line A431can suppress the proliferation of tumor cells,and can also induce apoptosis and cell cycle arrest.

Objective To detect the FHIT gene promoter methylation and protein expression in mycosis fungoides(MF).Methods Tissue specimens were collected from 48 patients with MF and 18 normal human controls.FHIT protein expression was determined by immunohistochemistry,and methylation status of FHIT gene by methylation-specific PCR.Results Abnormal methylation of FHIT gene was found in 26(54.2%)out of the 48 specimens.Thirty(63.5%)specimens of MF were negative for FHIT protein,which was observed in all the control specimens.The promoter methylation of FHIT was closely correlated with the protein expression of FHIT,but unrelated to the sex of,tumor staging or lymph node metastasis in patients with MF.Conclusion The FHIT gene promoter methylation may contribute to the inactivation and abnormal expression of FHIT protein in MF.

The exprimental teaching of medical immunology is the important constituent.We have explored the existing problems on course content,teaching method and experimental test way according to our practical teaching experience for the past few years.We have also made the preliminary attempt about reforming exprimental teaching of medical immunology.

Objective To evaluate the short-term efficacy, safety and effectiveness of epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) combined with radioactive 125I seed implantation in treating advanced non-small-cell lung cancer (NSCLC). Methods A total of 48 patients with inoperable and EGFR mutation-positive advance NSCLC were included in this study. The patients were divided into study group (n = 26) and control group (n = 22). Patients in the study group were treated with EGFR-TKIs combined with radioactive 125I seed implantation; while patients in the control group only received EGFR-TKIs treatment, which was kept on until the disease progressed. The clinical efficacy, and the incidence of side effect as well as the survival rate were determined, and the results were compared between the two groups. Results Local disease control rate of the study group and the control group was 92.3% and 68.2%respectively, the difference was statistically significant (P= 0.033), while the effective rate was 76.9% and 54.5%respectively, the difference was not significant (P=0.101). Progression-free survival (PFS) time of the study group and the control group was 14.1 months and 9.7 months respectively (P< 0.05). The one-year survival rate of the study group and the control group was 80.8%and 63.6%respectively (P<0.05), and the median survival time was 26.9 months and 17.1 months respectively (P < 0.05). The major complication caused by radioactive 125I seed implantation was pneumothorax. Conclusion For EGFR mutation-positive advance NSCLC, EGFR-TKIs together with radioactive 125I seed implantation is a safe and effective treatment.Its short-term efficacy is superior to pure EGFR-TKIs therapy. At present, this combination therapy is a new alternative for the treatment of EGFR mutation-positive advance NSCLC.

Objective To study the influence of post-void residual volume on prostate specific antigen (PSA) in patients with benign prostatic hyperplasia (BPH).Methods One hundred and sixty BPH patients who diagnosed by postoperative pathologic manifestations were selected.The patients were divided into 4 groups according to post-void residual volume with 40 cases each:non post-void residual volume (post-void residual volume ＜ 60 ml) group,less post-void residual volume (60 ml≤post-void residual volume ＜ 120 ml) group,middle post-void residual volume (120 ml ≤post-void residual volume ＜ 180 ml) group,mass post-void residual volume (post-void residual volume ≥180 ml) group.The serum PSA levels of 4 groups were observed.Results The PSA level in mass post-void residual volume group [(8.52 ± 6.72) iμ g/L] was significantly higher than that in non post-void residual volume group [(5.26 ± 4.16) μ g/L] and less post-void residual volume group [(5.93 ± 5.20) μ g/L],there were statistical differences (P ＜ 0.05),there was no statistical difference between non post-void residual volume group and less post-void residual volume group (P ＞ 0.05).Conclusions The serum PSA level in BPH patients with non post-void residual volume has no change,while the serum PSA level in BPH patients with mass post-void residual volume is significantly elevated.

Objective To evaluate the feasibility, safety, and efficacy of Y-shaped jogged stent in patients with malignant hilar biliary obstruction. Methods During the period of January 2010 to June 2015,We retrospectively reviewed 98 cases of malignant hilar biliary obstruction who were received implantation of biliary tract stent. 17 consecutive patients who were treated with Y-shaped jogged stent were identified (group A) during January 2012 to June 2015. Group A was carefully matched according to patients' age, sex, type of tumor, stage, type of biliary obstruction, level of bilirubin at diagnosis, presence of metastasis and treatment, and 17 patients who were underwent unilateral stent placement alone with PTCD were chosen as control group (group B). Patients' baseline characteristics, stenting strategy, complications, stent patency time and survival rates were analyzed, and continuous variables of the two groups were compared using Student's t-test. Categorical variables were analyzed using the Fisher exact test. Results Y-shaped jogged stent implantation group and control groups were closely matched in terms of patients' age, sex, type of tumor, stage, type of biliary obstruction, level of bilirubin at diagnosis, presence of metastasis and treatment ( P>0.05). The bilirubin decreased rate in the two groups was 88.2%and 53.0%respectively (P<0.05). The median time of stent patency after stent implantation was(7.3 ± 1.0)months and(5.7 ± 0.9) months respectively (χ2=4.04,P=0.044), and the median survival time was(9.1 ± 1.5)months and(7.2 ± 1.1)months (χ2=4.60,P=0.032), with significant difference according to Kaplan-Meier analysis. There were no severe complications such as massive hemorrhage, perforation, biliary fistula and severe pancreatitis, which were associated with stent implantation. Conclusions The application of Y-shaped jogged stent is safe, feasible and effective in patients with malignant hilar biliary obstruction. It can relieve the clinical symptoms of biliary obstruction effectively with prolongation of stent patency time and survival rate significantly.