Objective To isolate and identify the antitumor components of the fermentation of the actinomyces sh6004 derived from a piece of sponge(unidentified)collected in Jiaozhou Bay.Methods The antitumor components were isolated by bioassay-guided fractionation and using solvent extraction,silica gel column chromatography and preparative HPLC.Their structures were established by physicochemical properties and spectral analyses.The cyto- toxicity of compound 4 and the antimicrobial activities of compounds were evaluated by SRB and paper disc method,respectively.Results and Conclusion Four alkaloid compounds were i- solated and identified as bisdethiobis-(methylthio)-gliotoxin(1),actinomycin D(2),actino- mycin C_(2a)(3)and aetinomycin C_3(4),respectively.Actinomycins were the main antitumor components produced by actinomyces sh6004.Compounds 1～4 showed antimicrobial activi- ties against Staphylococcus aureus and Bacillus subtilis at a concentration of 10?g?mL~(-1).

In the evaluation of regional health planning as conducted in various parts of the country, there exist many possibilities with regard to the evaluation subject, evaluation content, evaluation model, and evaluation criteria. The paper analyzes these possibilities and their effect on the evaluation results and puts forward operational suggestions for such evaluation. With regard to the evaluation subject, the key role ought to be given to external evaluators, with internal evaluators playing an auxiliary role. With regard to the evaluation content, it is appropriate for the local governments or health administrative departments to conduct continuous plan evaluation and implementation evaluation, whereas policy evaluation ought to be conducted with the help of external evaluators such as academic societies. With regard to operability, it is proper for the local governments to conduct routine and periodic evaluations with fixed goals. The paper also discusses the realistic meanings embodied in various situations and solutions in case of a gap between the rational goals, planned goals and current index values in the evaluation of regional health planning. [

Cerebral microbleeds (CMBs) are a subclinical terminal microvascular disease in which the blood exudates or leaks out from the tiny blood vessels and the small lesions were formed by the deposition of hemosiderin in the brain tissue. The pathogenesis of cerebral microbleeds is different depending on the location, with lobar CMBs attributed to cerebral amyloid angiopathy (CAA), while cerebrovascular diseases caused by hypertension are an important cause of deep and subtentorium CMBs. The prevalence of CMBs in stroke patients is high, especially in patients with ischemic stroke treated with oral antiplatelet drugs, and long-term (>5 years) treatment may be related to CMBs and intracerebral hemorrhage (ICH) events. At the same time, a certain burden of microbleeds may cause risk of ICH in the future, but whether the bleeding risk of antiplatelet treatment overweighs the clinical benefit of antithrombotic therapy remains unclear. How to better instruct antiplatelet therapy in patients with ischemic stroke warrants further clinical investigations.

Objective:To understand the current status of foreign dual-degree programs of Medical Doctor (MD) and Master of Public Health (MPH) and provide evidence-based decision-making reference for promoting the education of high-level applied public health talents in China.Methods:The list of involved institutions and information of foreign MD-MPH dual-degree programs was collected through literature retrieval, online information searching, and additional survey of key figures. We extracted the details of each project regarding professional fields, core competence, length of schooling, teaching and learning arrangement, internship eligibility, and graduation assessment. Python 3.8.0 was used for data cleaning, and the occurrence frequency of related items in each dimension was calculated.Results:A total of 99 MD-MPH programs from 104 foreign institutions were included, among which 97.1% of them were implemented in universities from the United States. The School of Public Health provided 42.4% (42/99) of the programs. Epidemiology was the major discipline set up among most programs, accounting for 12.0% (29/241) of all the specialties involved. Epidemiological research methods, health policy management and practice, and public health practice were the top 3 core competencies to be mastered. Of the 99 programs, 87 gave information on the length of the program, of which 74.7% (65/87) were five years, 6.9% (6/87) were four years, and 18.4% (16/87) included both 4-year and 5-year programs.Conclusions:The international MD-MPH programs were sophisticated and mainly organized by the School of Public Health alone or in conjunction with the School of Medicine. Epidemiology is the core course and competence objective, with a length of 4-5 years. Through learning experience from international MD-MPH programs and the Chinese unique medical development background, China should optimize its medical education system to develop a suitable talent training strategy for MD-MPH dual-degree programs in the new era.