This paper categorizes implantable medical device of collagen on Chinese market according to manufacturing technique and performance.Combining with supervision requirements from China Food and Drug Administration (CFDA), this paper discusses safety evaluation in following aspects, such as immunogenicity risk,virus and infectious pathogen risk, and product technical requirements.Finally, the paper looks into the future of collagen implants considering technology progress in biomedical engineering, tissue engineering, and genetic engineering fields.

OBJECTIVE:To investigate the expression difference and its mechanism of miR-497 and miR-34a in platinum-sen-sitive and platinum-resistant epithelial ovarian carcinoma(EOC)patients. METHODS:A total of 72 EOC patients underwent ovari-an cancer staging surgery or cytoreductive surgery were selected from department of gynaecology and obstetriscs of our hospital dur-ing Jan. 2008-Jan. 2012. They received standardized platinum chemotherapy after surgery and were followed up (during Jul.2008-Jul.2016). According to the sensitivity to platinum,those patients were divided into platinum-sensitive group (42 cases) and platinum-resistant group (30 cases) . Real-time fluorescent quantitative PCR was adopted to detect the expression of miR-497 and miR-34a in tumor tissue,and the relationship of it with total survival period was investigated. The levels of DNA methylation of miR-497 and miR-34a promoter region were determined by nest type land type methylation specific PCR. Western blot assay was used to detect the H3K9 dimethylation(H3K9me2)levels. The H3K9me2 levels of miR-497 and miR-34a promoter region were de-termined by chromatin immunoprecipitation method. RESULTS:The expression levels of miR-497 and miR-34a in platinum-sensi-tive group were significantly higher than platinum-resistant group,with statistical significance (P<0.05). Total survival period of 72 patients was(45.7±17.5)months,which was positively correlated with the expression levels of miR-497 and miR-34a(r2 were 0.2714,0.3782,P<0.01). The DNA methylation of miR-497 and miR-34a promoter region in platinum-resistant group was signif-icantly higher than platinum-sensitive group,and H3K9me2 level of promoter region was significantly higher than platinum-sensi-tive group,with statistical significance (P<0.05 or P<0.01). H3K9me2 levels of platinum-resistant group were slightly higher than that of platinum-sensitive group,but there was no statistical significance (P>0.05). CONCLUSIONS:The expression of miR-497 and miR-34a in tumor tissue of EOC patients are related to the sensitivity of platinum chemotherapy and the survival time of patients. DNA methylation and histone methylation of promoter region may be one of the mechanisms of their expression changes.

Objectives To study the relationship between the severity of coronary lesions and serum uric acid.Methods Coronary heart disease(CHD) was diagnosed or excluded by coronary angiography; concentration of serum uric acid was measured with method of uric acid enzyme.Relationship between the severity of coronary lesions and serum uric acid was analysed by linear correlation and multiple stepwise regression.Results The level of serum uric acid in CHD group was significantly higher than that of control group(P

Objective:To develop a personality disorder inventory for undergraduates. Method:Based on three diagnostic criteria and clinic experience,the questions were collected after item revision and item analysis of three samples. A total of 425 undergraduates responded to the formal questionnaire. The data of formal questionnaire were used to evaluate the reliability and quality.Result:The whole questionnaire was compose of 160 items including five repeated items for reliability of the respondents. The whole inventory was consisted of ten factors, they were the borderline, the antisocial, the schizoid, the schizotypal, the avoidant, the paranoid, the obsessive-compulsive, the histrionic, the dependent, and the narcissistic. The ? coefficient of the whole questionnaire was 0.94, and the test-retest reliabilities was 0.85(P

Objective To use the DNA-pool technology to sequence patients with essential hypertension(EH) for exploring the single nucleotide polymorphism(SNP) mutation situation in Chinese patients with EH.Methods One hundred EH outpatients in the Shenzhen Sun Yat-sen Cardiovascular Hospital from March to June 2014 were continuously collected.The genomic DNA was performed the fragmentation process to 400-800 bp for conducting the database creation and sequencing.The sequencing results were compared with hg19 in the human gene bank(National Center of Biotechnology Information).Results A total of 120.8 Gb original sequence data were generated.The sequencing depth was 36.13 times,the coverage rate reached 99.88%.A total of 4 305 668 SNP loci were detected by the bioinformatic analysis,in which the C:G→T:A motation types were miximal,reaching 12 314 variation sites.Conclusion This study verifies that the data obtained by using the DNA-pool whole genome resequencing method replenishes the Chinese gene database of EH and provides some help for EH gene reasearch in the future.

Objective To prepare and identify the monoclonal antibody (mAb) specific to epithelial cell adhesion molecule (EpCAM) and explore the function of the mAb.Methods The EpCAM antigen expressed by the prokaryotic expression systems was used to immunize the BALB/c mice,and then the splenic cells from the mice were fused with the Sp2/0 cells to produce hybridomas secreting specific mAb.The positive clones were screened by the ELISA.The western blot analysis was used to identify the reactivity of the mAb to the antigen.Then the immunohistochemistry staining was used to detect EpCAM expression in the 3 primary colorectal carcinoma tissues.Results Three mAb specific to EpCAM were obtained by ELISA tests.Western blot results indicated that these three kinds of antibodies could react to the EpCAM antigen,but no response to the GST tag.Immunohistochemical staining results identified that these mAb could give positive signals to the primary colorectal carcinoma tissues from patients.Conclusion Three mAb specific to EpCAM are obtained and identified,which contributes to the diagnosis and therapy of the carcinoma in the future.

Objective To observe and compare the clinical effect of aerosol inhaled and systemic glucocorticoid treatment and its influence on the expression of procalcitonin ( PCT) and hyper-sensitive C reactive protein ( hs-CRP) in elderly patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD).Methods 146 elderly patients with AECOPD were enrolled prospectively.The patients were divided in three groups randomly, including inhalation group (48 cases referred as 2 mg of budesonide nebulization every 8 hours with therapeutic course of 5 days), intravenous group (50 cases referred as 40 mg methylprednisolone intravenous injection once daily with therapeutic course of 5 days), and control group (48 cases with no glucocorticoid ) .All the patients were treated with routine oxygen therapy, anti-inflammation, bronchodilators (β2 receptor agonist and doxofylline) and mucolytics, and so on.The levels of serum PCT and hs-CRP were detected before and after five days treatment, and also the clinical parameters such as symptoms, blood gas analysis, lung function, hospital days, fasting blood glucose and adverse reaction were simultaneously recorded. Results The general clinical data demonstrated no significant difference among the groups.Compared with the control group, the total effective rate, improvement rate of lung function (FEV1%pred and FEV1/FVC) and of blood gas parameters (pH value, PaO2 and PaCO2) in the inhalation group and intravenous group were higher, with shorter hospital days(P<0.05), while with no obvious difference between the two group.The levels of the serum PCT and hs-CRP were decreased in the patients enrolled after treatment, compared with the prior treatment (P<0.05).Compared with the control group, the levels of serum PCT and hs-CRP in the inhalation group and intravenous group decreased significantly, while with no obvious difference between the two groups.The levels of fasting blood glucose in the intravenous group were the highest;compared with the control group, the adverse effect incidence of the inhalation and intravenous groups were higher obviously, with the most obvious in the intravenous group ( P<0.05 ). Conclusion Application of glucocorticoid is benefit to improving the clinical symptom and lung function, and to rectifying hypoxemia and to shortening hospital days.The aerosol inhaled and systemic glucocorticoid application shows equivalent clinical efficiency on anti-airway inflammation.The glucocorticoid inhalation has fewer adverse effects and is recommended to treat the elderly patients with AECOPD .

Objective To explore the health inspector effect on the score of hygienic degree of hostels. Methods Using the scale for hygienic degree of hostels, 38 health inspectors from 9 sections in the Bureau for Health Inspection and Supervision of Haidian District in Beijing, scored 621 hostels in the district. The multilevel statistics model has been used to analyze the health inspector effect, of which the index is intra-class correlation (ICC), in the double level model structured by hostels as the level 1 unit and inspectors as the level 2 unit, and in the triple level model structured by hostels as the level 1 unit, inspectors as the level 2 unit and the sections as the level 3 unit. Results In the double level model, ICC of the level 2 unit is 0.142 8. In the triple level model, ICC of the level 2 unit is 0.0000 and ICC of the level 3 unit is 0.154 1. Conclusion There is inspector effect influencing the score of hygienic degree. And the effect seems to be more similar in one section comparing with the other ones.

Objective To explore the basic health state of the hotels in Haidian District. Methods 736 hotels were chosen to investigate on the hygiene state, in Haidian District, Beijing, during Feb.-Jul., 2006, based on the tables for the hygienic quantified and classified management of hotel health supervision. Results The hygienic quantified and classified standard score of 736 hotels was 53.7?22.6, and the standard score of the common hotels, one or two stars hotels and three or more stars hotel were 50.9?21.5, 58.9?24.7, 76.4?17.1. 50 households (6.8%) within them were A degree, 144 households (19.6%) were B degreee, 121 households(16.4%) were C degree and 421 households(57.2%) were D degree. Conclusion The general hygienic state of the hotels should be paid more attention to. The hygienic state changes with the level of the hotels.

Objective To explore the effects of taurine-zinc(TZC) on blood lead content and blood-brain barrier(BBB) permeability of growing rats exposed to lead.Methods Male SD rats aged 3 weeks were randomly divided into four groups(8 in each group):control group,lead exposure group,dimercaptosuccinic acid(DMSA) group and TZC group.The exposure group treated with 0.12% lead acetate(0.2 ml/100 g body weight) by intraperitoneal injection,DMSA group and TZC group were treated with the same dose of lead acetate but were respectively supplemented with 5 mg/ml DMSA(2 ml/100 g body weight) by ig and 0.46 g/L TZC solution through drinking.Three weeks later,blood lead content was measured by atomic absorption spectroscopy(AAS) and changes of BBB permeability were observed using lanthanum nitrate tracer method.Results Compared with the lead exposure group,the blood lead level in TZC group and DMSA group was significantly reduced(P