0.05) among three groups in expression rate of CD_(40L) on B lymphocyte and CD_8~+T cells.Conclusions Abnormal level of CD_(40)/CD_(40L) what attack asthma and stable asthma showed on their relevant immune cells would have an important significance in development of allergic asthma.

BACKGROUND: Bone defect repair is a difficulty in orthopedic field all the time, researches on the tissue engineered bone tissue have provided completely new thoughts and methods for bone defect repair, and it is an important link to detect the biocompatibility of the biomaterials.OBJECTIVE: To investigate the biocompatibility of PCL with bone marrow stromal cells (BMSCs).DESIGN: A controlled observation.SETTING: Department of Orthopaedics, the First Affiliated Hospital of Xinjiang Medical University.MATERIALS: The experiments were carried out in the orthopedic laboratory of the First Affiliated Hospital of Xinjiang Medical University. Healthy 4 to 8-week-old New Zealand rabbits of about 2 kg were used.METHODS: ① Bone marrow was extracted from bilateral femurs of the rabbits, then mixed into 10 mL RPMI1640 complete medium, and then entered the passage culture. ② The cells were inoculated and then divided into PCL group and control group, the cells were only inoculated in the control group, and the BMSCs were co-cultured with PCL in vitro in the PCL group. The morphological observed, cell proliferation, protein content and enzymological determinations were conducted.MAIN OUTCOME MEASURES: The growth and the adhesion of BMSCs on PCL biomaterials were mainly observed.RESULTS: In the control group, most of the BMSCs changed to the shape of fusiform or multi-angles. In the PCL group, the BMSCs could adhere and proliferate on PCL, and the growth and function were not affected, PCL also played a certain role in promoting the cell proliferation.CONCLUSION: PCL possess satisfactory biocompatibility, and it is possible to be used as the carrier of BMSCs in tissue engineering.

Objective To assess the effect of the gamma knife radiosurgery (GKS) for acoustic neuromas, and to analyze the MRI features of the tumors after GKS. Methods GKS was performed in 309 patients with acoustic neuromas from December 1994 to December 2002 at our center. The Leksell Gamma Knife models B and C were used. 249 cases with 256 tumors were followed up with MRI, which included 107 males and 142 females. The median age of the patients was 48.7?14.2 years (10-77 years). GKS was applied as primary treatment for 189 cases (75.9%), and was an adjunctive management approach for 60 cases (24.1%). The median clinical follow-up period and radiological follow-up period was (26.4?21.3) months (6-101 months) and (22.4?19.0) months (6-93 months), respectively. Results Of the 256 tumors, 79 tumors (30.8%) regressed, 165 tumors (64.5%) remained stable, 12 tumors (4.7%) enlarged, and the overall tumor control rate was 95.3%. Among 30 tumors of NF-Ⅱ , 8 tumors (26.6%) regressed, 19 tumors (63.4) remained stable, and 3 tumors (10.0%) enlarged, and tumor control rate was 90%. The rate of hearing deterioration was 22.7%, the rate of permanent facial paralysis was 0%, the rate of transient facial paralysis was 5.9%, and the incidence of transient trigeminal neuropathies was 19.9%. On the image of follow-up MRI, 79 tumors (30.0%) showed loss of contrast enhancement (LOE). LOE was the imaging property of neuromas on follow-up MRI, which symbolized a chronic decrease in the vascularity of neuromas. The histological findings of LOE demonstrated radiation-induced tumor necrosis. The transient swelling of tumors could not be confounded with the growth of tumors. Conclusion GKS is confirmed to be an effective treatment for acoustic neuromas and plays an important role in the control of NF―Ⅱ, and GKS can prevent cranial nerve from injury to a great extent.

Objective To assess the effect of preoperative carbohydrate preconditioning on postoperative insulin resistance and inflammatory response in patients after gastroenteric tumor resection.Methods Sixty patients with elective gastroenteric tumor resection were divided into preoperative carbohydrate preconditioning group and control group by random digits table with 30 cases each.Preoperative carbohydrate preconditioning group was given oral containing 50 g glucose carbohydrate 300 ml 2 h before surgery,and control group was given traditional method,fasting 12 h before surgery and water deprivation 6 h before surgery.The blood samples were collected to measure the level of fasting blood glucose (FBG),fasting insulin (FINS),interleukin (IL)-6 and C-reactive protein (CRP),3 h before surgery and 1,3,7 d after surgery respectively.Homeostasis model assessment insulin resistance index (HOMA-IR) was computed.Results There were no statistical differences in FBG,FINS,IL-6,CRP and HOMA-IR 3 h before surgery between the 2 groups (P ＞ 0.05).The FBG,FINS,IL-6,C RP and HOMA-IR in the 2 groups at 1,3 d after surgery were significantly higher than those 3 h before surgery,but those except for FBG in control group were significantly higher than those in preoperative carbohydrate preconditioning group [1 d after surgery:(39.67 ± 10.37) mU/L vs.(25.78 ± 12.43) mU/L,(98.67 ± 12.42) μg/L vs.(65.36 ± 16.72)μg/L,(121.74 ±11.32) mg/L vs.(82.18 ±4.36) mg/L,19.07 ±5.49 vs.11.67 ±6.32;3 d after surgery:(24.34 ±6.78) mU/L vs.(16.23 ±7.56) mU/L,(116.43 ± 18.57) μg/L vs.(78.53 ± 10.38) μg/L,(151.30 ± 10.46) mg/L vs.(129.29 ± 10.24) mg/L,8.56 ±2.87 vs.5.12 ±2.11],there were statistical differences (P ＜0.05).There were no statistical differences in FINS and HOMA-IR in preoperative carbohydrate preconditioning group between 7 d after surgery and 3 h before surgery (P ＞ 0.05),but there was statistical difference in control group (P＜ 0.05).There were no statistical differences in FBG,IL-6 and CRP in the 2 groups between 7 d after surgery and 3 h before surgery (P ＞ 0.05).There was no aspiration during anesthetic stage.Conclusion Preoperative carbohydrate preconditioning may shorten the insulin resistance time after gastroenteric tumor resection,reduce the intensity of insulin resistance,and improve inflammatory response,thus contributing to the rehabilitation of patients.

[Objective] To investigate the epidemiology of mild cognitive impairment (MCI) in the aged from Luohu district of Shenzhen city and to analyze the related factors. [ Methods ] Mini-mental State Examination (MMSE) questionnaire in Chinese was used to investigate MCI in 410 aged people from eight Communities of Luohu district, Shenzhen. [Results] The incidence of MCI in this survey was 21.46% and the MMSE scoring varied with age, educational level and sex (P

Objective To discuss the epidural cavity surgical anatomical physiology under fiber optic epidural catheter, and to analyze the technological advantages compared to the the agent under blind. Methods 60 cases who need to epidural abdominal surgery from Jan. to Nov. 2013 were collected. Common duct (30 cases) and fiber optical epidural catheter (30 cases) were respectively used at anesthesia, and the epidural cavity surgical anatomy physiology were observed. Results Compared with indexs before anesthesia, before induction and before intubation, the HR, SPB, and MAP in 5 min after intubation and at the moment of skin incision were of statistically significant differ-ences (P<0. 05). There is a cavity between epidural space and vertebral canal periosteum which is not linked to cranial cavity, but there were a certain amount of connective tissue and venous plexus. The volume of the cavity was about 100 mL, the front and side were narrow and the back was wide, and it began to gradually expand from the neck, and reached its peak at the waist, and then gradually narrowed, un-til the sacral hiatus. Conclusion Fiber optic epidural catheter could make the patient’ s anatomy physiology structure more clear, and it also make it possible to cathetering visually for the anesthesiologist.

Objective To investigate the expressions and correlations of Kiss-1 and matrix metalloproteinases-9 (MMP9) proteins in the colorectal cancer (CRC) tissues of patients with synchronous colorectal liver metastasis (SCRLM),and the association with the clinicopathologic factors and prognosis of patients.Methods The retrospective case-control study was adopted.The clinicopathological data of 96 patients with SCRLM and 69 patients with CRC and no metastasis who were admitted to the Eastern Hepatobiliary Surgery Hospital of the Second Military Medical University from January 2000 to May 2013 were collected.The 96 CRC tissues and 50 adjacent normal tissues (distance from resection margin ≥ 5 cm) were collected from 96 patients with SCRLM,and 69 CRC tissues were collected from 69 patients with CRC and no metastasis.Expressions of Kiss-1 and MMP9 protein were detected by immunohistochemistry (IHC).The follow-up of outpatient examination and telephone interview was performed to detect survival of patients till August 2014.Comparison of count data and correlation between expressions of Kiss-1 or MMP9 protein and clinicopathological factors were analyzed by the chi-square test and Fisher exact probability.Survival curve was drawn using the Kaplan-Meier method,and survival analysis was done using the Log-rank test.Correlation analysis was done by the Pearson correlation.Results Expression of Kiss-1 protein was located in the cytoplasm of tissue cells.The positive expression rates of Kiss-1 protein in CRC tissues of patients with SCRLM and with CRC and no metastasis and in adjacent normal tissues were 24.0％ (23/96),43.5％ (30/69) and 52.0％ (26/50),respectively,with a significant difference among the 3 tissues (x2 =14.307,P ＜ 0.05) and no significant difference between CRC tissues of patients with CRC and no metastasis and patients with SCRLM (x2 =0.845,P ＞ 0.05).The positive expression rate of Kiss-1 protein in CRC tissues of patients with SCRLM was significantly different from that in CRC tissues of patients with CRC and no metastasis and in adjacent normal tissues (x2 =0.702,11.594,P ＜ 0.05).Expression of MMP9 protein was located in the cytoplasm of tissue cells.The positive expression rates of MMP9 protein in CRC tissues of patients with SCRLM and with CRC and no metastasis and in adjacent normal tissues were 67.7 ％ (65/96),62.3 ％ (43/69) and 36.0％ (18/50),respectively,with a significant difference among the 3 tissues (x2=14.203,P ＜0.05) and no significant difference between CRC tissues of patients with CRC and no metastasis and patients with SCRLM (x2=8.038,P ＞ 0.05).The positive expression rate of MMP9 protein in CRC tissues of patients with SCRLM was significantly different from that in CRC tissues of patients with CRC and no metastasis and in adjacent normal tissues (x2 =13.475,13.475,P ＜ 0.05).The positive expression rates of Kiss-1 protein in CRC tissues of patients with SCRLM were 66.7％,21.9％ and 17.6％ in the high-,mederate-and low-differentiated tumor,50.0％,28.6％ and 17.5％ in the muscular layer of tumor invasion,outside of serosa and serosal layer,44.0％ and 16.9％ in patients with and without lymph node metastasis,respectively,showing significant differences among the tumor differentiation degree,depth of tumor invasion and lymph node metastasis (x2=6.546,6.172,7.453,P ＜0.05).The positive expression rates of MMP9 protein in CRC tissues of patients with SCRLM were 25.0％,66.7％ and 76.2％ in the muscular layer of tumor invasion,outside of serosa and serosal layer,44.0％ and 76.1％ in patients with and without lymph node metastasis,respectively,showing significant differences between the depth of tumor invasion and lymph node metastasis (x2 =12.094,8.690,P ＜ 0.05).All the 96 patients with SCRLM were followed up for a median time of 68 months (range,12-176 months).The median overall survival time,median tumor-free survival time,5-year cumulative survival rate and 5-year tumor-free survival rate were 31 months,26 months,69.6％ and 26.1％ in patients with SCRLM and positive expression of Kiss-1 protein and 26 months,19 months,24.7％ and 12.3％ in patients with SCRLM and negative expression of Kiss-1 protein,respectively,showing significant differences between the overall survival and tumor-free survival (x2=16.578,14.436,P ＜ 0.05).The median overall survival time,median tumor-free survival time,5-year cumulative survival rate and 5-year tumor-free survival rate were 31 months,19 months,24.6％ and 12.3％ in patients with SCRLM and positive expression of MMP9 protein and 28 months,16 months,58.1％ and 22.6％ in patients with SCRLM and negative expression of MMP9 protein,respectively,showing significant differences between the overall survival and tumor-free survival (x2=14.073,8.532,P ＜0.05).Of 96 patients with SCRLM,there were 23 patients with positive expression of Kiss-1 protein (10 with positive expression of MMP9 protein and 13 with negative expression of MMP9 protein) and 73 with negative expression of Kiss-1 protein (55 with positive expression of MMP9 protein and 18 with negative expression of MMP9 protein),with a negative correlation between expressions of Kiss-1 protein and MMP9 protein (r =-0.291,P ＜ 0.05).Conclusions The reduced expression of Kiss-1 protein and elevated expression of MMP9 protein are closely associated with invasion and metastasis of CRC and prognosis of patients.A combination detection of Kiss-1 and MMP9 proteins is expected to become a marker for predicting the prognosis of patients with SCRLM based on the negative correlation between them.

AIM: To observe the effect of mouse Sim2 (mSim2) eukaryotic expression vector transfection on the cell cycle in PC12 cells in vitro and to explore the role of Sim2 in the pathogenesis of Down syndrome. METHODS: The full open reading frame of mSim2 was amplified by reverse transcription-polymerase chain reaction (RT-PCR) and cloned into the vector pcDNA3. Then the constructed pcDNA3-Sim2 vectors were transiently transfected into PC12 with Lipofectamine~ TM . The expression of mSim2 was detected by RT-PCR. The effect of mSim2 on the cell cycle was observed by flow cytometry. RESULTS: The eukaryotic expression vector mSim2 was successfully constructed. There was notable expression of mSim2 in the cells transfected with pcDNA3-Sim2. There were more cells in G_0/G_1 phase in the pcDNA3-Sim2 transfected cells than that in the control (P

Objective: To determine bacteriostatic drugs nipagin esters and metronidazole illegally added to chitosan medical devices.Methods: An HPLC method was used with a ZORBAX Eclipse XDB-C18(250 mm×4.6 mm, 5 μm)column.The mobile phase was water and acetonitrile(65∶35).The flow rate was 1.0 ml·min-1.The detection wavelength was 254 nm.The column temperature was 35℃ and the injection volume was 10 μl.Results: Nipagin esters were detected out in chitosan suppositories and gel.Metronidazole was detected out in chitosan lotion.Conclusion: The method is simple and fast, which has guiding significance for further comprehensive studies of bacteriostatic drugs illegally added to chitosan medical devices.

Objective · To investigate the correlation between proportion of natural killer (NK) cells and dendritic cells (DCs) and liver injury in patients with chronic hepatitis B virus (HBV) infection. Methods · Peripheral blood samples were collected from 65 patients with chronic HBV infection and 10 healthy volunteers (HCs group). Flow cytometry was used to detect the proportion of peripheral NK cells and DCs. The patient were divided into asymptomatic HBV carrier (AsCs) group, chronic hepatitis B in low or moderate grade (CHB-LM) group, and chronic severe hepatitis B (CSHB)group.The relationship of the proportion of NK cells, the proportion of DCs, and the ratio of NK/DC with the degree of liver injury was analyzed. Results · The proportion of peripheral NK cells was significantly lower in CHB-LM group (9.29%±1.20%) and CSHB group (3.60%±0.79%) than that in HCs group (14.77%±2.90%) and AsCs group (14.05%±2.32%) (P=0.000). And the proportion of peripheral DCs was significantly higher in CHB-LM group (4.10%±1.18%) than that in HCs (1.67%±0.31%), AsCs (2.05%±0.46%) and CSHB groups (2.08%±0.41%) (P=0.000). The ratio of NK/DC was decreased in CSHB and CHB-LM groups compared to that in HCs and AsCs groups (P=0.000). The correlation analysis indicated the proportion of NK cells was negatively correlated with the levels of ALT, AST, TB and DB (r=-0.50, r=-0.49, r=-0.53, r=-0.51, P=0.000 for all) in patients with chronic HBV infection. Conclusion · The proportion of peripheral NK cells and the ratio of NK/DC in patients with chronic hepatitis B were decreased. The decrease of the frequency of NK cells and the ratio of NK/DC were associated with liver injury in patients with chronic HBV infection.