BACKGROUND: Previous results of our study show that oyster extract has some protective effects on apoptosis of the neuroepithelium in neural tube defects induced by hyperthermia in vivo.It remains unclear whether the extraet also protects in vitro cultured neural stem cells.OBJECTIVE: To investigate the protective effect of oyster extract on apoptosis of cerebral neural stem cells induced by hyperthermia.METHODS: The cerebral neural stem cells of embryonic mice of 13 days were cultured in vitro.Nestin expression was detected by immunofluorescence method to identify neural stem cells.The neural stem cells of passage 3 were divided randomly into 4groups: hyperthermia control group and oyster treated Ⅰ,Ⅱ,Ⅲ groups(mass concentration 2.5,5,10 g/L oyster extract solution).In addition,culture solution control group(no cells),and culture solution+oyster extract control group(no cells)were designed.All oyster extract groups and control groups were treated by hyperthermia over 39 ℃.The survival rate and the vitality of neural stem cells were detected by trypan blue staining and MTT assay.Western-blotting was employed to explore the expression of p53 in cerebral neural stem cells of each group.RESULTS AND CONCLUSION: The survival rate and the value of MTT assay in oyster treated groups Ⅱ and Ⅲ were significantly greater than hyperthermia control group(P < 0.05),but the expression of p53 in oyster treated groups Ⅱ and Ⅲ were weaker than hyperthermia control group.Oyster extract plays an important protective role in the apoptosis of neural stem cells induced by hyperthermia.

Objective:To explore the effect of continuous quality improvement theory on patients' satisfaction and nurses'perception of working environment.Methods:Quality nursing service satisfaction survey was conducted in 450 patients,at the same time,100 nurses were investigated for the situation of working environment.Patients' satisfaction and the status of nurses' perception of their own work environment were compared before and after the implementation of continuous quality improvement theory.Results:After the implementation of continuous quality improvement theory,both patients' satisfaction and nurses' perception of working environment were significantly improved (P ＜ 0.05).Gonclusions:Continuous quality improvement theory can improve the satisfaction of patients with high quality nursing service,and enhance the nurses' perception of their working environment.

Objective:To identify the healing effect of electrospun silk fibroin-BMP-2 as a biologic pulp capping agent to inflammatory pulp in rat caused by lipopolysaccharide ( LPS) .Methods:A total of 30 healthy adult male Wistar rats were randomly divided into five groups:(1) normal control group without operation;(2) blank control group without capping agents;(3) calcium hydroxide capping group;(4) electrospun silk fibroin capping group;(5) electrospun silk fibroin-BMP-2 capping group .Bilateral up-per first molars of each rat in group 2-5 were drilled to expose the pulp to LPS which was used to estab-lish a model of inflammatory pulp .The exposed pulp was capped with different capping agents or without capping agents.Then the hole was sealed.The animals were sacrificed on days 3, 7, and 14 post-opera-tion and histological analysis was carried out , including HE stain and CD 14 immunohistochemical stain . Results:On day 7 and 14 , the lowest inflammatory reaction score in HE stain among pulp capping groups was that of silk fibroin-BMP-2 group .The next were calcium hydroxide group and silk fibroin group .That of blank control group was the highest .The ranking of reparative dentine scores of those groups was just reversed.The D values of immunohistochemical stain of CD 14 were not significantly different in groups applied pulp capping agents but significantly lower than blank control group on days 3 and 7.However, the D value of silk fibroin-BMP-2 group ( 0 .145 ±0 .011 ) was significantly lower than blank control group (0.287 ±0.019), calcium hydroxide group (0.170 ±0.017) and silk fibroin group (0.175 ± 0 .018 ) on day 14 .Conclusion:Electrospun silk fibroin compounded with BMP-2 promoted wound hea-ling of exposed pulp and had better potential to stimulate formation of reparative dentine to establish a suitable environment for pulp recovery .

Objective To investigate the effects of the zinc finger protein A20 on LPS-TLR4 signaling pathways in severe acute pancreatitis(SAP) rats.Methods 24 SD rats were randomly divided into 3 groups:group A(the sham operation group),group B (the SAP group),group C (the SAP group treated with LPS).SAP model was induced by retro-injection of intraductal 5％ sodium taurocholate into the biliary-pancreatic duct as previously described.The protein expression of A20,TLR4,NF-κBp65 and p38MAPK in pancreatic tissues was evaluated by immunohistochemistry.Results The positive area of A20 in pancreatic tissues was decreased in group B and group C compared with that in group A (t =17.234,19.698,all P ＜ 0.05).On the contrary,the expression of TLR4,NF-κBp65 and p38MAPK in pancreatic tissues were up-regulated(t =15.909,20.432,16.543,18.629,22.105,19.006,all P ＜ 0.05).A20 was decreased in group C than that in group B (t =14.894,P ＜ 0.05),while TLR4、NF-κBp65 and p38MAPK were increased in group C than those in group B (t =14.047,15.582,17.070,all P ＜0.05).Conclusion The expression of A20 reduced and TLR4,NF-κBp65 and p38MAPK enhanced in the pancreas of rats with SAP,which indicated that A20 inhibited LPS-TLR4 signaling pathways which play important roles in the pathogenesis of SAP.

Objective:To determine drug dose and usage of timolol maleate eye drops in the treatment of superficial infantile hemangioma.Methods:A total of 250 superficial hemangioma infants were recruited and assigned into 5 groups (n=50 for each group):an external application group and 4 exterior coating groups (2,4,6,8 times per day).We evaluated the therapeutic effect of different methods for drug application (external application or exterior coating) and the frequency for drug administration on superficial infantile hemangioma.Results:The external application group (twice a day and 0.5 hour per time) showed better effect than that in the exterior coating group with twice a day (P＜0.001).The difference in therapeutic effect between the exterior coating group with 6 times a day and exterior coating group with twice a day or with 3 times a day was significant (P＜0.001).The differences in drug efficacy were not found among the exterior coating group with 6 times a day,the exterior coating group with 8 times a day,or the external application group with twice a day (All P＞0.05).Conclusion:Drug dose may affect the therapeutic effect oftimolol maleate eye drops in superficial hemangioma infants,and exterior coating with 6 times a day may achieve the best curative effect.

Objective To study the effect of comfortable nursing of cancer related fatigue and quality of life in patients with gastric cancer. Methods A total of 76 cases in our hospital for gastric cancer radical operation of gastric cancer patients from January 2013 to January 2014 as the observation objects, randomly were divided into observation group and control group, 38 cases in each group. The control group underwent conventional symptomatic care, the intervention group mainly implemented comfortable nursing, the quality of life of fatigue of RPFS scores and QOL scores were com-pared between the two groups before and after intervention. Results There were no significant differences in behavior, emotion, body tired, cognitive RPFS scores between intervention group and control groups before intervention (P>0.05). After the intervention, the behavior fatigue, emotional fatigue, body fatigue and cognitive RPFS scores in interven-tion group and control group were significantly reduced compared with before intervention, and there was statistically significant difference between two groups (P<0.05). The physical function, role function, cognitive function, emotional function, social function of QOL scores of intervention group and control groups had no significant difference before in-tervention (P>0.05). After the intervention, the physical function, role function, cognitive function, emotional function, social function and QOL scores in intervention group and control group increased significantly compared with before in-tervention, there was statistically significant difference between two groups (P<0.05). Conclusion After radical opera-tion of gastric cancer patients, comfortable nursing intervention can reduce patient cancer-related fatigue, improve the quality of life of patients, conducive to the resumption of the disease.

Herb-glycosides are main active elements of Zhongcaoyao (Chinese traditional medicines, Chinese medical herbs). However, the herb-glycoside structures are not optimal active structure for the human bodies. After orally taken up, the herb-glycosides of Zhongcaoyao could be changed into other more active structures by the digestive system such as enzymes and intestinal microorganisms; then degraded and absorbed in the human body and play the real role of pharmic effect; but only a small amount could be changed and controlled by circadian state of the human body. If this biochange of herb-glycosides to more active structures in vivo was finished in vitro, it is very useful for the development of the Chinese traditional medicines, new plant medicines, health food, and function cosmetics. To biotransformate herb-glycosides to more active structure, this paper introduced the studies of author's team on the new microorganism isolation of the special herb-glycosidases and enzyme fermentation, the special enzyme purification and characterization.
Bacteria ; enzymology ; metabolism ; Drugs, Chinese Herbal ; chemistry ; Fermentation ; Ginsenosides ; metabolism ; Glycoside Hydrolases ; metabolism ; Glycosides ; isolation & purification ; metabolism ; Saponins ; metabolism

Objective To explore the effectof cognitive behavioral Intervention on the quality of life and cognitive lever of patients with venous thrombus embolism. Methods 164 patients with Venous Thrombus Embolism were randomly divided into control group and research group, the control group received routine care, The study group received cognitive behavior intervention. The cognitive lever and quality of life score was measured between before and after the intervention. Results Before the intervention, the difference score of living quality and cognitive lever in the two groups has no statistical significance (P > 0.05), and after intervention, the cognition lever and the three aspects of risk factors, anticoagulant knowledge and treatment methods of research group scored (28.47 ± 7.63), (7.38 ± 2.48), (6.82±2.73), (3.64±1.59) points which were significantly higher than the control group scored (20.54±5.49), (4.31±2.14), (3.72±1.62), (2.18±1.36) points (t=7.635, 8.469, 8.822, 6.299, P<0.01),the quality of life and four dimensions of daily life ability, pain, social activities, mental scored ( 37.04 ± 7.08), [9.00 (5.00, 11.00)],(9.04 ± 1.55),(5.52 ± 1.59),(14.00 ± 3.06) points which showed great improvement than the control group scored [49.50(39.75-59.25)], [11.50 (6.75, 16.00)], (10.05 ± 1.65), (7.95 ± 2.19), (19.18 ± 3.88) points. There were significant difference in the quality of life and four dimensions between the two groups. (Z=-3.558,-2.143, t=2.102, 4.274, 4.991, P<0.05 or 0.01). Conclusions The quality of life for the venous thrombus embolism patients were in lower level. The cognitive behavioral intervention could correcting their bad behavior and negative emotions, eventually improve the quality of life of venous thrombus embolism patients.

Objective: To explore whether individualized exercise prescription can improve the walking ability of patients with lower extremity arteriosclerosis occlusion (ASO). Methods: A total of 64 ASO patients with ankle brachial index (ABI) between 0.6 and 0.9 were randomly divided into the observation group (32 cases) and the control group (32 cases), Patients in the control group received routine nursing intervention, and patients in the observation group received nursing intervention based on individualized exercise prescription, ABI and walking impaired questionnaire (WIQ) scales were measured at admission and 12 weeks after intervention. Results: There was no statistically significant difference in ABI values before and after the intervention of the control group (P > 0.05), and ABI values before and after the intervention of the observation group were 0.72 + 0.15 and 0.77 + 0.13 respectively (t=2.254, P < 0.05). There was no statistically significant difference in walking distance and walking speed before intervention (P > 0.05) in the two groups; the walking distance and walking speed after intervention in the observation group were (498.38±77.11) m and (50.44±11.27); the control group was (461.72±64.64) m and (44.02±9.86), and the differences were statistically significant (t=2.06, 2.43, P < 0.05). Conclusions Individualized exercise prescription can improve the degree of ischemia of the affected limb, improve the walking distance and walking speed of the patients, and it is convenient to implement and worthy of clinical promotion.

Objective:To establish a performance evaluation index system and evaluation method for young scientists in hospitals, and to provide reliable evidence for management departments in evaluating, selecting outstanding young scientists and formulating tailored training programs.Methods:Literature analysis, expert consultation, analytic hierarchy process and data envelopment analysis were adopted in this article to evaluate the scientific research performance of young scientists in hospitals.Results:The scientific research data of young scientists under 45 years of age in Peking University Cancer Hospital from 2015 to 2019 were collected, and their scale efficiency and technical efficiency were analyzed by using index system and its weight and propose the improvement measures to achieve the purpose of evaluation and reform.Conclusions:This method is useful for the effective evaluation of the young scientists in the hospital, and is helpful to improve the level of scientific research management, as well as realize the virtuous circle of matching the input and output of scientific and technological innovation.