Objective To analyze the advances of cancer stem cell (CSC) in recent years, and to propose a prospect for CSC research and cancer therapy. Methods Articles about important advances of CSC theory and cancer therapy were reviewed, and then selected and summarized. Results In 2001, CSC was first put forward as a concept, till now, which has been confirmed in many tissues. In recent years, efforts were dedicated to such topics including: identification of CSC in sol id tumors, the origin of CSC, its niche and growth mechanism, cancer therapy, etc. According to the CSC theory, traditional therapeutic methods have deficiencies, and new treatment targeting CSC may thoroughly el iminate tumors. Conclusion At present, CSC theory is still controversial, while it proposed revolutionary methods and directions for the therapy of cancer.
Objective To investigate the clinical effects and safety differences of open surgery and laparoscopy primary lesion resection combined with D2 lymph node dissection in the treatment of elderly patients with advanced gastric cancer. Methods One hundred and forty elderly patients with advanced gastric cancer were chosen and randomly divided into two group including open operative group (70 patients) with primary lesion resection combined with D2 lymph node dissection by open operation and laparoscopic surgery group (70 patients) with primary lesion resection combined with D2 lymph node dissection by laparoscopy; and the operative time, intraoperative bleeding amount, the levels of PaCO2 in operation, liquid diet eating time, postoperative anal exhaust time, postoperative gastric tube indwelling time, postoperative ambulation time, the level of haemoglobin (Hb) after operation, the hospitalization time, the number of lymph node dissection, the survival rate with followed-up and postoperative complication incidence of both groups were compared. Results There was no significant difference in the operative time between 2 groups (P>0.05). The intraoperative bleeding amount, the level of PaCO2 in operation, liquid diet eating time, postoperative anal exhaust time, postoperative gastric tube indwelling time, postoperative ambulation time, the level of Hb after operation and the hospitalization time of laparoscopic surgery group were significantly better than open operative group (P<0.05). The level of PaCO2 in operation of laparoscopic surgery group was significantly higher than open operative group (P<0.05). There were no significant difference in the gastric lymph node dissection number and the peripheral lymph node dissection number of gastric artery between 2 groups (P>0.05). There were no significant difference in the survival rates between the 2 groups after 3-year followed-up (P>0.05). The complication incidence after operation of laparoscopic surgery group was significantly lower than open operative group (P<0.05). The quality of life scores of patients in laparoscopic surgery group were significantly higher than those in open operative group on 7 days and in 3 months after operation, and the difference were statistically significant (P<0.05). Conclusion Compared with open operation, primary lesion resection combined with D2 lymph node dissection by laparoscopy in the treatment of elderly patients with advanced gastric cancer can efficiently possess the advantages including minimally invasive, shorter recovery time and less postoperative complications.
ObjectiveTo analyze the progress in biological tissue engineering scaffold materials and the clinical application, as well as product development status. MethodsBased on extensive investigation in the status of research and application of biological tissue engineering scaffold materials, a comprehensive analysis was made. Meanwhile, a detailed analysis of research and product development was presented. ResultsConsiderable progress has been achieved in research, products transformation, clinical application, and supervision of biological scaffold for tissue engineering. New directions, new technology, and new products are constantly emerging. With the continuous progress of science and technology and continuous improvement of life sciences theory, the new direction and new focus still need to be continuously adjusted in order to meet the clinical needs. ConclusionFrom the aspect of industrial transformation feasibility, acellular scaffolds and extracellular matrix are the most promising new growth of both research and product development in this field.
Objective To review the study progress of mesenchymal stem cells induced to differentiate intervertebral disc cells Methods The recent related literature was reviewed. The theorical and experimental studies were summarized. Results MSCs had the potential of multidirectional differentiation.International experimental studies indicated the potential of MSCs induced to differentiate intervertebral disc cells. Conclusion MSCs induced to differentiate intervertebral disc cells has the fine prospect.
Objective To expound the progress of the reparative and reconstructive surgery (RRS), especially in the recent 20 years, and the developmental direction in the future. Methods We reviewed the information from many books, journals, and conference compilations concerned with RRS. Results RRS emerged with modern surgery. After its development for 20 years, distinguished achievements were obtained in technologies, e.g., biological fixation of bone fracture, bioactive materials, stem cells, tissue engineering, bioactive factor, and induction/ derivation regeneration of tissues and organs. Moreover, ideas were continuously refreshed in RRS, such as emphasis on the equal importance of donor and recipient in autologous transplantation, and of structural and functional restoration in dentofacial surgery. Conclusion Further research programs should be conducted, especially in the fields of creative theories, innovative techniques, and rehabilitation engineering.
Objective To review the lately new progress of fish collagen as biomedical materials, and then analyze feasibility and risk management of its application as a substitute of collagen originated from mammals in clinical practice. Methods Based on extensive research on new application and investigation of fish collagen, the paper was prepared to bring comprehensive analysis of its research and application status, and then several key points were focused on. Results Fish collagen has been proved to be a novel collagen of rich source, low risk of virus transmission, low biological risk, less religious barrier, and high biocompatibility. Fish collagen has promising prospect when applied in clinical practice as novel collagen especially as a substitute of collagen derived from mammals. However, very few related translational medicine research of fish collagen has been reported up to now in China. Conclusion As a novel potential substitute of collagen source derived from mammals, fish collagen is concerned to be clinical feasible and necessary in translational medicine. However, massive applied basic researches should be focused on in the further investigations.