Oxidative stress induces autophagy to inhibit the proliferation and apoptosis of human bone marrow mesenchymal stem cells (hBMSCs) / 细胞与分子免疫学杂志

Objective To investigate the effect of H2O2-induced oxidative stress on autophagy and apoptosis of human bone marrow mesenchymal stem cells (hBMSCs). Methods hBMSCs were isolated and cultured. The cells were divided into control group, 3-MA group, H2O2 group, H2O2 combined with 3-MA group. DCFH-DA staining was used to analyze the level of reactive oxygen species (ROS). hBMSCs were treated with 0, 50, 100, 200, 400 μmol/L H2O2, and then the cell viability was detected by CCK-8 assay. The level of autophagy was detected by monodansylcadaverine (MDC) staining and LysoTracker Red staining. The cell apoptosis was detected by flow cytometry. Western blotting was used to detect the expression of beclin 1, mTOR, phosphorylated mTOR (p-mTOR), cleaved caspase-3(c-caspase-3) and caspase-3 proteins. Results Compared with the control group and 3-MA group, ROS level and autophagosomes were increased and the proliferation and apoptosis were decreased in H2O2 group. The protein expression of beclin 1, mTOR, c-caspase-3 was up-regulated, while the p-mTOR was down-regulated. Compared with the 3-MA group, the H2O2 combined with 3-MA group also had an increased ROS level and autophagosomes, but not with significantly increased apoptosis rate; The protein expression of beclin 1, mTOR, c-caspase-3 was up-regulated, and the p-mTOR was down-regulated. Conclusion H2O2 can induce hMSCs to trigger oxidative stress response. It enhances the autophagy and inhibits the proliferation and apoptosis of hBMSCs.

Management initiatives and practices of international cooperation base for science and technology / 中华医学科研管理杂志

Objective The study reviewed the exchanges and the outcome of the research cooperation of the platform of the Beijing International Cooperation Base for Science and Technology (ICBST),to explore a combined mode of internationalized research management of "base","talents" and "projects".Methods To analyze the outcomes of talents programs,international research cooperation projects and publications with the support of the Beijing ICBST.Results The establishment of BICBST has nurtured research talents to develop international vision,facilitated project-oriented international research cooperation,and encouraged high level research publication and grants.Conclusions ICBST is of great significance for the implementation of international research cooperation,which brought in more resources,cultivated a group of creative research talents,and broadened the channels for international collaborations and achieved capacity and influence of international competitiveness.

Funding and effect analysis on Hospital-level Young Scholar Scientific Research Program in tertiary public hospital / 中华医学科研管理杂志

Objective To understand and analyze the effect and impact on Hospital-level Young Scholar Scientific Research Program in personal training and project promoting.Methods To review and analyze the archived documents and data materials of total 402 Young Scholar Scientific Research Program involving 339 young fellows from 2003 to 2013,compared the research input and output with general hospital level,including getting new fund,publications,Awards and patent.Results Output on researchers with Young Scholar Scientific Research Program is much higher than the general hospital level,but showing unbalanced distribution in medical disciplines.Conclusions To establishment of Young Scholar Scientific Research Program has achieved very good effect in promoting research in tertiary public hospital as well as has empowered the young fellows for conducting scientific research independently.It is proposed to go on strength the scientific management and optimize the system construction of research input,further establishing academic communication platform for young fellows.