BACKGROUND: Streptococcus mutans (S. mutans) is generally considered to be the principal aetiological agent for dental caries, thrS gene may relate to the virulence of S. mutans involved in the adherence, acidogenicity and acidodurance.OBJECTIVE: To investigate the conservation status of the thrS gene of S. mutans and to construct the homologous recombinant plasmid.METHODS: Southern Blot was used to analyze the distdbuUon of thrS gene in S. mutans. The upstream and downstream sequences of thrS gene were cloned respectively into multiple cloning sites of suicide plasmid pFW5 to construct the recombinant plasmid,RESULTS AND CONCLUSION: The thrS gene was conserved in 6 strains of S. mutans in this test. By PCR analysis and enzyme digesting, it was confirmed that S. mutans thrS gene homologous recombinant plasmid was successfully constructed,which can be used in future research of construction of thrS -negative mutans of S. mutans strain UA159.

Objective:To construct the prokaryotic expression vector pET28a(+)-comE, to get the highest expression of comE in E. coli BL21(DE3), and to obtain the purified ComE fusion protein. Methods: ComE gene was amplified by PCR with specific primers from genome of Streptococcus mutans UA159. After digested by two restriction endonucleases BamH Ⅰand Xho Ⅰ, the gene segment was inserted into vector pET28a(+). Then the recombinant vector was transformed into E. coli BL21(DE3). The protein expression was induced by IPTG and the result was confirmed by Western blot. The solubility of the fusion protein was examined by 12% SDS-PAGE, and the expression conditions were optimized. Finally the fusion protein was purified by a two-step purification procedure utilizing Ni2+ chelating column and S75 size exclusion column. Results: The recombinant plasmid was confirmed by PCR, restriction endonucleases digestion and sequence analysis, which showed that the inserted segment was identical to comE gene reported by GenBank without nucleotide mutation. The fusion protein which was confirmed by Western blot can be expressed in E. coli BL21(DE3) and existed both in supernatant and precipitation. The maximum expression product amount was obtained when the A600 value of E. coli BL21(DE3) was 0.4, IPTG concentration was 0.10 mmol/L and induction time was 4 h. Conclusion: The recombinant plasmid is constructed and the ComE fusion protein is purified by the optimum conditions.

Objective:To knock the phospho-sugar mutase gene (psm) out of the genome of S. mutans strain UA159 and to construct the mutant will lay a foundation for the study of the function of the psm. Methods:Two upstream and downstream DNA sequences of the psm were selected and cloned respectively into multiple cloning sites I and II of suicide plasmid pFW5 to construct the recombinant plasmid which was confirmed by enzyme digesting and sequencing. The recombinant plasmid was transformed into S. mutans UA159 by natural transformation and antibiotic was used to screen the positive transformants. According to the principle of homologous recombination, allelic exchange between the recombinant plasmid and S. mutans UA159 was achieved. Results:By PCR analysis and sequencing, it was confirmed that the psm of S. mutans UA159 was substituted for resistant gene of spectinomycin. Conclusion: The psm-negative mutants of S. mutans UA159 is successfully constructed.

ObjectiveTo investigate the effect of nursing intervention on quality of life in patients undergoing total hysterectomy. Methods100 patients undergoing total hysterectomy were randomly divided into the intervention group and the control group with 50 patients in each group.The patients in the control group were given routine instruction after admission,before and after operation.The patients in the intervention group were given systematic nursing intervention on the basis of routine nursing.The quality of life three months postoperation was compared between two groups. ResultsThe quality of life in the intervention group three months after operation was better than that of the control group. ConclusionsSystematic nursing intervention for patients undergoing total hysterectomy during hospitalization can improve their postoperative quality of life.

In October 2016, the CPC Central Committee and State Council issued the outline of Healthy China 2030 Plan and put forward two main principles, namely integrating health into all policies (HiAP), and adhering to co-construction and co-sharing and mobilizing the whole society to participate.Based on this view, after analyzing the main contradictions in the social governance of China's health field, this paper points out that the synergistic design of social governance and the common governance by the whole society are the key issues to the implementation of China's health policy.This paper attempts to build a health-centered social governance mechanism that puts forward the focus on opening up the channels for citizens to participate in health policy, the formation of a unified health common value, the in-depth exploration of establishing community health services model that integrates medical resources with pension resources together to participate in the building of healthy China.

Described in the paper is the reform made at public hospitals in Zhejiang province,with analysis of its problems and causes. Based on such,the authors proposed the following actions:to accelerate the reform of public hospitals centering on health promotion, and encourage such hospitals to shoulder the health care responsibility on behalf of the government; to proceed with hierarchical medical system and contract-based service focusing on capacity building of general practitioners; to attract private capital into building the healthcare system; and to motivate non-governmental organizations to cater to diversified healthcare needs of the people.

Burnout, Professional ; psychology ; Humans ; Job Satisfaction ; Midwifery ; Salaries and Fringe Benefits ; Social Identification

Objective:To investigate the impact of China's Mental Health Law on the work of psychological counseling in colleges and universities, and to explore ways to improve the law. Methods: Totally 12 heads of college and university counseling centers in Beijing were conducted with semi-structured interviews. The average age of the interviewees was (40 ±7) years old, with master or doctor degrees in psychology or related disciplines. The method of content analysis was used to analyze the interviewees' understanding of the " Mental Health Law". Results: All of the 12 interviewees had gained some understanding of the "Mental Health Law", and accordingly amended the regulation of their counseling centers. Also, interviewees suggested the positive and negative impacts brought by the law, such as enhancing practitioners' legislative sense, clarifying their responsibilities and boundaries as college and university counseling, as well as difficulties to distinguish psychotherapy and psychological counseling, ambiguity in the legality of working with students who were diagnosed with mental disorders. Moreover, interviewees threw out suggestions on improving the law from the aspect of industry standard, supervision department and vocational qualification. Conclusion: The execution of "Mental Health Law" improves practitioners' legislative sense, clarifies their responsibility. Nevertheless, it does not clearly distinguish psychotherapy from psychological counseling, and be lack of regulation on the psychological counseling industry.

Objective:To summarize experience of nursing in radiofrequency ablation (RFA) for adrenocortical adenoma with Cushing′s syndrome combined steroid-induced diabetes mellitus.Methods:The key of preoperative nursing was precise glucose control by using insulin pump. Focus on patients psychological intervention. It was important for closely monitor the change of blood pressure, cortisol levels and biochemical index to prevent acute complications such as adrenal crisis during RFA. Pay attention to postoperative nutrition management for reduce blood glucose fluctuation and adverse reactions of hydrocortisone at postoperative.Results:No severe complications occurred during this procedure. After twenty-day nursing and treatment, the patient′s blood glucose control was stable, and the symptoms related to Cushing′s syndrome gradually disappeared.Conclusion:The ultrasound guided radiofrequency ablation in adrenocortical adenoma with Cushing′s syndrome combined with steroid-induced diabetes mellitus was a feasible, safe, and minimally invasive treatment. The key to effectively reduce postoperative complications and ensure the success of the operation. Are adequate preoperative preparation and strict monitor.

Based on the chemical structures of magnolol and honokiol,a series of small molecular derivatives were designed for the treatment of Alzheimer's disease.Through the Discovery Studio,five compounds (6a-6e) exhibited the inhibitory activity against Aβ and Tau proteins in all of the designed compounds.Then the five compounds are chemically synthesized and their biological activities were tested by thioflavin T.The result showed that compound 6a had inhibitory effect on the aggregation of two kinds of target proteins at the concentration of 100 μmol/L,which deserves further research.