Objective:To observe the effect of eupolyphaga seu steleophaga(ESS) on the proliferation of autosom al dom inant polycystic kidney disease(ADPKD) cyst- lining epithelial cells.Methods:ESS serum and control serum were obtained from SD rats gastrogavaged with ESS water solution and physiological solution.ADPKD cyst- lining epithelial cells were treated with RPMI16 4 0 containing:(1) EGF0 ,2 .5 ,5 ,10 ,2 0 ng/ ml;(2 ) ESS serum and control serum(1% ,2 .5 % , 5 % ) ;(3) EGF10 ng/ ml,ESS serum and control serum(1% ,2 .5 % ,5 % ) .The cell proliferation was determined by Brdu incorporation assay. Results:EGF had a stimulating effect on the ADPKD cyst- lining epithelial cells;the ESS serum significantly inhibited the proliferation of ADPKD cyst- lining epithelial cells compared with control serum;ESS serum also significantly inhibited the proliferation of ADPKD cyst- lining epithelial cells activated by EGF(10 ng/ m l) com pared with control serum.All the effects were dose- dependent.Conclusion:Eupolyphaga seu steleophaga may prolong the progression of ADPKD via the inhibitory effect on the proliferation of cyst- lining epithelial cells. [

Objective Detecting the influence of swainsonine bring in the expression of N?glycan of osteosarcoma tumor stem cells. Methods LM8 cells were cultured in the culture medium (free of serum), then selected the LM8 cells of both CD44 and CD133 positive by magnetic activated cell sorting technique. Detecting the levels ofβ1, 6 branch N?glycan expression in the selected LM8 cells (treating by different doses of N?glycosylation inhibitor swainsonine) surface through the lectin binding assay (L?PHA). Results (96.5 ± 1.2)%of LM8 cells were both CD133 and CD44 positive which selected from all the LM8 cells in culture medium (free of serum) by magnetic activated cell sorting technique. Lectin binding assays shown that the bound rare of osteosarcoma tumor stem cells and L?PHA was (90.3 ± 2.1)%, which was higher than normal LM8 cells and L?PHA by (54.3 ± 3.1)%(P<0.05). The positive rare ofβ1, 6 branch N?glycan on the selected LM8 cells(treat with 1mg/mL swainsonine) surface was 90%. The positive rare of β1, 6 branch N?glycan on the selected LM8 cells (treat with 5mg/mL swainsonine) surface was 21%. Conclusion N?glycosylation inhibitor swainsonine plays a role in inhibiting the expression of N?glycan on cell surface of osteosarcoma tumor stem cell.

Objective To analyze the learning curve of microendoscopic lumbar discectomy (MED) and summarize the operative experience. Methods From July 2010 to March 2012, the first 100 patients with single level lumbar disc herniation managed with MED were divided into chronological groups (A, B, C and D), 30 patients in group A, B, C and 10 patients in group D. The comparsons were conducted in terms of operative time , estimated blood loss , number of cases with transition from MED to open surgey or for reoperation , rate of complications and postoperative efficacy. Results The mean operative time and the mean estimated blood loss in each group was valuated respectively. In group A , the operative time and estimated blood loss were significantly decreased as compared with those in group B, C and D respectively (P < 0.05), but those in group B were not significantly different from those in group C and D (P > 0.05). There were 6 complications in group A, 1 complication in group B and C respectively and no complication in group D. The leg pain visual analogue scale and Oswestry disability index at the first month and the twelfth month postoperatively were all improved respectively as compared with those preoperatively (P < 0.01). Conclusion The learning curve of microendoscopic lumbar discectomy generally may reach the plateau when about 30 cases are operated on. The key procedure to pass over the learning curve includes puncture and location , flavectomy , anatomy mark identification, and precaution of damage in dural sac.

BACKGROUND:Fragile bone in senile osteoporosis patients easily weakened pedicle screw fixation capacity. Therefore, bone cement leakage and screw removal cannot be solved during pedicle screw repair in osteoporotic patients with degenerative lumbar spine. OBJECTIVE:To investigate the biomechanical properties of novel pourable pedicle screws and bone cement application effect in osteoporotic patients with degenerative lumbar spine. METHODS:Six lumbar specimens (T11-L5) at the mean age of (72.9±4.2) years were selected, total y 42 vertebrae. The average bone density was 0.696 g/cm2. Any side of al vertebrae was inserted with pourable pedicle screws. 2 mL of bone cement was perfused under the X-ray fluoroscopy with cement push rod and fil ing cylinder. The same number of conventional screws was inserted into the opposite side of the samples. Three-point bending test was performed in two kinds of screws. The maximum vertebral axial pul out force test and the maximum spin torque test were conducted in vertebra to observe the destruction of the vertebral body and implanted effect. RESULTS AND CONCLUSION:(1) The ultimate strength and yield load of novel pourable cement pedicle screws were significantly more than conventional screws (P<0.05). Ultimate displacement and yield displacement were significantly less in novel pourable cement pedicle screws than in conventional screws (P<0.05). (2) The maximum vertebral axial pul out force and the maximum spin torque were significantly higher in novel pourable pedicle screws than in conventional screws (P<0.05). (3) In summary, novel pourable cement pedicle screw is simple to operate, can effectively control bone cement penetration, and improve screw stability in osteoporotic vertebrae. Moreover, after treatment, the removal of screws is convenient, cannot evidently destroy vertebral body or screw channel, and promote early recovery.

According to the World Report on Disability, compared with the normal children, the enrollment rate of the handicapped children is lower, as well as the rate of in-school children and their chances to get further study. A series of barriers limit the opportunities for these children to accept the mainstream education in such aspects as education policies, systems and services. To solve these problems, the education system and schools have to make some changes so that we could remove all kinds of hardware and software barriers and provide a reasonable adjustment and other support services. Only based on these improvements can we ensure the handicapped children have equal chances to accept education. And the report enlighten us that we should perfect the system construction as well as teacher cultivation and promote community inclusion to ensure the right of education of disabled children.

Osteosarcoma ( OS) is the most common primary malignant bone tumor in children and adolescents. Currently, the combination of surgical resection and chemotherapy is the main method of treatment for OS in the clinic.Al-though, the survival rate has been greatly improved in OS patients with localized disease, the 5-year survival rate has re-mained <20%.It is very important to understand the cause of disease, to develop novel drugs or therapeutics, and to learn the disease through animal models.This review will introduce the progress of animal models of osteosarcoma over the last years.

Objective To prepare and identify monoclonal antibody against LRR-WSC domain of polycystin-1 and to investigate the distribution of polycystin-1 in kidney tissues and kidney cell lines. Methods BALB/c mice were immunized with fusion protein PC1-e of polycystin-1 LRR-WSC domain. The splenocytes were fused with myeloma cells by PEG 4000 and the hybridomas were selected in HAT medium. The hybridoma clones secreting antibodies against polycystin-1 LRR-WSC domain were detected by enzyme-linked immunosorbent assay ( ELISA) and cloned by limiting dilution. The specificity of anti-polycystin-1 LRR-WSC domain monoclonal antibody from hybridoma was verified by ELISA and Western blot. The distribution of polycystin-1 in tissues and cells was detected by immunohistochemical method. Results One cell line of hybridoma secreting monoclonal antibody against polycystin-1 was established. Western blot analysis showed that the monoclonal antibody reacted strongly and specifically to polycystin-1 LRR-WSC domain. Distribution of polycystin-1 in fetal kidney was localized in tubular epithelium. In normal adult kidney tissues, our study showed that polycystin-1 was mainly expressed in the medullary collecting ducts and distal convoluted tubules. Positive staining was also found in the majority of cyst-lining epithelial ceEs of cystic tissue from autosomal dominant polycystic kidney disease ( ADPKD) patients. Expressions of polycystin-1 were found in either ADPKD cyst-lining epithelia cell line and LLC-PK1, clearly plasma membrane and intracytoplasmic staining of polycystin-1 were observed. Conclusion Specific monoclonal antibody against polycystin-1 LRR-WSC domain were obtained. The antibody is important to researching the mechanism of ADPKD. The distribution of polycystin-1 in kidney tissues and cells show that polycystin-1 was important in tubular elongation and the maintenance of tubular architecture.

[ ABSTRACT] AIM:To compare the differences of the genome-wide methylation levels and methylated regions be-tween nasopharyngeal carcinoma ( NPC) cells in the same genetic background but different radiation resistance ( CNE-2 cells and CNE-2R cells).METHODS:Using the method which was developed by Doctor Zhao Cun-you, based on using methyl-sensitive restriction enzyme to measure the genome-wide methylation levels.In addition, MeDIP-Seq was used to analyze the methylated regions in 6 gene functional elements, including the upstream 2k sequence, 5’ UTR, coding se-quence, intron, 3’UTR and downstream 2k sequence, between CNE-2 cells and CNE-2R cells.RESULTS:The genome-wide methylation level was approximately 30%lower in CNE-2R cells than that in CNE-2 cells.No obvious difference on the amount of genes and the coverage of the peak in the 6 gene functional elements was observed.However, the methylation pattern of plentiful genes had altered in the gene function elements.CONCLUSION:The genome-wide methylation levels and methylated regions between NPC cells in the same genetic background but different radiation resistance were quite dif-ferent, indicating that the DNA methylation may be associated with NPC radioresistance.

Objective:To investigate the clinical features and associated influencing factors of cognitive impairment in middle-aged and elderly Chinese adult patients undergoing maintenance hemodialysis (HD).Methods:A cross-sectional study was conducted among HD patients from 11 centers in Beijing city from April 2017 to June 2017. A neuropsychological battery covering domains of attention/processing speed, executive function, memory, language, and visuospatial function was applied in cognitive function assessment. Patients were classified as normal cognitive function group and cognitive impairment group according to the fifth version of the diagnostic and statistical manual of mental disorders criteria (DSM-V). Multivariate binary logistic regression was used to analyze the independent influencing factors of cognitive impairment. Results:A total of 613 HD patients were included in the study, and the prevalence of cognitive impairment was 80.91% (496/613). Attention impairment (81.05%) and memory impairment (63.51%) were the most common impaired domains, and 79.23% was concomitant impairment across two or more cognitive domains among those with cognitive impairment. Compared with the patients in the normal cognitive function group, the patients in the cognitive impairment group had senior age, longer dialysis vintage, higher proportion of diabetes, hypertension, and stroke, higher level of serum intact parathyroid hormone (iPTH), lower education level, and lower urea clearance index (Kt/V) (all P<0.05). Factors were independently associated with cognitive impairment including increasing age ( OR=1.110, 95% CI 1.072-1.150, P<0.001), education time>12 years (with education time<6 years as reference, OR=0.323, 95% CI 0.115-0.909, P=0.032), history of diabetes ( OR=2.151, 95% CI 1.272-3.636, P=0.004), history of stroke ( OR=2.546, 95% CI 1.244-5.210, P=0.011), increased dialysis vintage ( OR=1.016, 95% CI 1.010-1.022, P<0.001), reduced Kt/V( OR=0.008, 95% CI 0.002-0.035, P<0.001), and increased iPTH level ( OR=1.002, 95% CI 1.002-1.003, P=0.012). Conclusions:The prevalence of cognitive impairment in middle-aged and elderly adult Chinese patients undergoing HD is high. Memory and attention are the most commonly impaired domains. Increasing age, low education level, history of diabetes and stroke, increased dialysis vintage, reduced Kt/V and increased serum iPTH are the independent influencing factors associated with cognitive impairment.

Objective:To investigate the association between cognitive impairment and all-cause mortality in middle and elderly adult patients undergoing maintenance hemodialysis (HD).Methods:A prospective cohort study was conducted. Patients from 11 HD centers in Beijing between April and June 2017 were enrolled. Baseline data were collected, and a series of neuropsychological batteries covered 5 domains of cognitive function were applied for the assessment of cognitive function. The patients were then classified as normal and cognitive impairment groups according to the fifth version of the Diagnostic and Statistical Manual of Mental Disorders criteria (DSM-V) and followed-up until June 2018. The clinical characteristics of the two groups of patients were compared. Kaplan-Meier survival analysis was used to compare the difference in the cumulative survival rate between the two groups. Multivariate Cox regression model was used to analyze the independent influencing factors of all-cause mortality, to determine the relationship between cognitive impairment and different cognitive domain impairments and all-cause death.Results:A total of 613 patients were enrolled, of which 496(80.91%) patients had cognitive impairment. Compared with the normal cognitive function group, the patients in the cognitive impairment group tended to be older, longer dialysis vintage, a higher proportion of diabetes, hypertension, and stroke, increased serum iPTH level, and lower education level and urea clearance index (Kt/V) (all P<0.05). After (49.53±8.42) weeks of follow-up, Kaplan-Meier survival analysis showed that the cumulative survival rate of cognitive impairment group was significantly lower than that of cognitive normal group (Log-rank χ2=8.610, P=0.003). Multivariate Cox regression analysis showed that history of diabetes ( HR=2.742, 95% CI 1.598-4.723, P<0.001), coronary heart disease ( HR=1.906, 95% CI 1.169-3.108, P=0.010), dialysis vintage (every increase of 1 month, HR=1.007, 95% CI 1.003-1.011, P=0.001), serum level of albumin (every increase of 1 g/L, HR=0.859, 95% CI 0.809-0.912, P<0.001), cognitive impairment ( HR=2.719, 95% CI 1.088-6.194, P=0.032) were independently associated with all-cause mortality. Multivariate Cox regression analysis on different cognitive domains also indicated that memory impairment ( HR=2.571, 95% CI 1.442-4.584, P<0.001), executive function impairment ( HR=3.311, 95% CI 1.843-5.949, P=0.001) and three, four, five domains combined impairment ( HR=5.746, 95% CI 1.880-17.565, P=0.002; HR=12.420, 95% CI 3.690-41.802, P<0.001; HR=13.478, 95% CI 3.381-53.728, P<0.001) were independently related to all-cause mortality. Conclusions:Cognitive impairment is an independent risk factor of all-cause mortality in middle and elderly adult patients undergoing maintenance hemodialysis, and the risk is significantly increased in patients with the impairment of the domains of memory, executive function, or in the combination of three to five cognitive domains.