Objective: To study the effect of Maitork (a sodium chloride injection containing Ginkgo bioba extract and ligustrazine phosphate) on plasma levels of fibrinogen (Fg), platelet granule membrane protein 140 (GMP-140), tissue plasminogen activator (tPA) after focal cerebral ischemia-reperfusion in rats. Methods: Eighty male SD rats were randomly allocated into groups 3-day (n=40) and 7-day (n=40) after operation. Then each group was divided into 4 subgroups: sham-operation, ischemia control, Ginaton and Maitork. The focal cerebral ischemia model was established in rats. The activities of GMP-140 and tPA were measured by chromogenic substrate assay, and the level of Fg was measured by gel plaque assay. Results: The level of Fg in the Ginaton group was significantly higher than that in the ischemia control group, and the 7-day group was also significantly higher than that in the Maitork group (P

Objective The inhibitory effects of avastin on new blood vessels in nonproliferation diabetic retinopathy, age-related macular degeneration and neovascular glaucoma have been demonstrated. But only seldom report of avastin on corneal neovascularization(CNV) was seen. Present study was to evaluate the effect of topical bevacizumab (avastin) on experimental corneal neovascularization in mice. Methods Thirty eyes of 30 Balb/c mice were chemically cauterized by applying a 2 mm-diameter filter paper soaked 1 mol/L NaOH solution at the central cornea for 40 s. All animals were randomly assigned to five groups, including 1 mg/mL, 3 mg/mL and 5 mg/mL bevacizumab eye drops group respectively, 1 mg/mL dexamethasone sodium phosphate eye drops group (positive control) and normal saline solution group (negative control) . The drug was topically utilized twice per day. CNV was examined under the slim lamp on the 3rd, 7th and 14th day after alkali burn. Animals were killed on the 14th day after alkali burn. Area of CNV was calculated in terms of pixels on digital photographs. The use of animals followed the Regulations for the Administration of Affair Concerning Experimental Animals by State Science and Technology Commission. Results No significant difference was found in the grade of corneal injury among five groups (F = 0. 201, P = 0. 935). The area of neovascularization at the cornea surface was (37.11 ±3.17)% in 1 mg/mL bevacizumab group, (29.75 ±3.56)% in 3 mg/mL bevacizumab group, (18. 76 ± 2. 55) % in 5 mg/mL bevacizumab group, (20. 91 ± 2. 75) % in dexamethasone group and (41. 65 ±2. 11)% in normal saline group, showing a significant difference among groups(F = 71. 687, P =0. 000) with the further comparative decline in 5 mg/mL bevacizumab group compared with other groups (P ＜ 0. 01) . Conclusion The topical use of bevacizumab (avastin) inhibits alkali burn-induced CNV in mice.

Objective To observe the outcomes of living donor liver transplantation (LDLT) for children with biliary atresia (BA) and to summarize the clinical experiences. Methods Forty-four BA patients (26 boys and 18 girls) underwent LDLT between October 2006 and December 2010. Mean (SD) and median (range) age at operation was (12.1 ± 9.0) months and 9 (6-60) months,respectively. The 44 donors were lineal relatives to the consorted recipients. Their mean (SD) and median (range) age at operation was (32. 7 ± 8. 0) months and 31 (20～54) years, respectively. All donor graft types were the left lateral segments with compatible ABO blood groups. Clinical data,including pre-operative evaluations, surgical technique, postoperative management and outcomes in all donors and recipients were retrospectively analyzed. Results All donors were followed up for (17. 5 ± 13. 3) months. No donor mortality was encountered, with a minimal morbidity and no long-term sequelae. Nine out of 44 recipients died. Three patients died of portal vein thrombosis (PVT), one of hepatic artery thrombosis (HAT), two of biliary complications, one of surgical site infections, one of abdominal bleeding and one of pulmonary infection. The overall 1-year and 2-year cumulative survival rate in recipients was 81. 2% and 76. 1 %, respectively. No re-transplantation was done. Postoperative complications included PVT, HAT, biliary leakage and refluxing cholangitis, pulmonary infections,surgical site infections and acute rejection. Conclusion LDLT has been the effective treatment for pediatric recipients with BA and provides favorable prognosis. To improve prognosis of recipients, the key points are pre-operative evaluations, surgical technique, and postoperative management

Objective To characterize the clinical course of biliary complications after right lobe living donor liver transplantation (RL-LDLT) and to identify the independent risk factors for biliary strictures.Methods 105 consecutive RL-LDLT recipients operated from April 2007 to April 2010 were followed up. The clinical and operative data were reviewed. The biliary complications and independent risk factors of biliary stricture were studied.Results The median follow-up duration was 49.5 months ranging from 562 to 1675 days.A total of 40 patients (38.1 ％) experienced 11 bile leak episodes (10.4％ ) and 37 (35.2％) biliary stricture episodes after transplantation.Bile leaks occurred at a median time of 9 days ranging from 4 to 54 days after transplantation.For biliary strictures,the occurring time was delayed and scattered wide with a median of 7.6 months ranging from 12 to 790 days after transplantation. Moreover, the biliary stricture incidence in the first year after transplantation was significantly higher than later.The independent risk factors for biliary strictures were CMV infection,bile leaks and bile duct size (≤3 mm).Conclusion The independent risk factors for biliary strictures after RL-LDLT were CMV infection,bile leaks and bile duct size (≤3mm).In order to avoid biliary complications,careful preoperative evaluations are necessary. The dissection of bile ducts should be meticulous to protect its blood supply.CMV infection should be prevented after transplantation.Close surveillance of biliary complications should be given to RL-LDLT recipients during the first year after transplantation.

Objective From the perspective of the application of Beijing Tongzhou district science and technology project,we can grasp the present situation,existing problems and opportunities of the hospital.Methods Taking the information of the application declared by Beijing Luhe Hospital in 2017 as the research object,using the Excel,statistical analysis of the applicants'age,professional title,degree and departments distribution;summing up the common problems of the expert feedback.Results The study found that the 144 subjects participated in the declaration had been laying particular stress on each of the five areas,including:research category,applicants‘ age,professional title,degree and department.Conclusions Based on the data of the application,we have made a preliminary discussion about the overall planning and management measures of the future hospital scientific research.

Objective To achieve the hospital's scientific research objectives during the 13th five-year plan period,we designed to know about the potential NSFC application capacity and existed problems in our hospital.Methods Using "Questionnaire Star" network investigation platform to design questionnaire and conduct data analysis.Results Respondents are divided into two groups,one was who intend to apply in next three years while the other would not.it is found that there are obvious differences between the publication of SCI,as well as the previous research project application and conducting experiences.Conclusions In order to improve the rate of NSFC application,the hospital scientific management workers can consider doing the following:Improve the number of SCI papers published from the perspective of helping to encourage and forcing pressure.Strive for financial support from all parties and build a central experimental platform to create conditions for basic experiments for clinical medical workers.Regular and in time training for NSFC application.Some pressure when necessary to promote the extension of low-level study.Pay more attention to the incentives of research performance at the department level.

Objective Through analyzing and summarizing the experiences and reflections during the construction of regional medical scientific research alliance,to explore the ultimate goal and ideal model of such work.Methods Literature review,as well as working experience summary and analysis.Results The purpose of setting up regional medical scientific research alliance lies in shared regional medical scientific research data information,using the two-way transformation model of laboratory and clinical research to support the medical service of primary health care in local hospitals,at the same time,promoting the construction and development of regional medical alliance.The ideal model is to make good use of the regional clini cal scientific research data sharing platform and related information sharing platform to promote the collaborative development of regional medical scientific research.Conclusions The ultimate goal of collaborative development of scientific research is to establish "an information map of regional scientific research resources",the map can be used for scientific research project cooperation,resource allocation,integration of scientific research forces and training of talent echelon,thereby comprehensively improve the regional research capacity.

Objective:To evaluate the relationship between Sestrin2 and mitochondrial DNA (mtDNA)-NOD-like receptor associated protein 3 (NLRP3) inflammasome pathway during endotoxin-induced myocardial injury in mice.Methods:One hundred and eighty-four clean-grade healthy male ICR mice, aged 8-12 weeks, weighing 20-25 g, were used in this study. One hundred and sixty-eight mice were divided into 7 groups ( n=24 each) using the random number table method: normal control group (N group), lipopolysaccaride(LPS) group (L group), mtDNA group, LPS+ mtDNA group (M group), normal control+ negative control adeno-associated virus (AAV-NC)group (NC group), LPS+ mtDNA+ AAV-NC group (MC group), and LPS+ mtDNA+ Sestrin2 overexpression adeno-associated virus (AAV-Sestrin2) group (MSgroup). Another 10 mice were used to detect the transfection effect of AAV-Sestrin2, and the left 6 mice were used for mtDNA extraction. The model of endotoxemia was developed by intraperitoneal injection of LPS 10 mg/kg. mtDNA 5 mg/kg was intraperitoneally injected in mtDNA group, and mtDNA 5 mg/kg was intraperitoneally injected at 30 min after LPS injection in M group.AAV-Sestrin2 150 μl was injected via the tail vein in MS group, and the equal volume of AAV-NC was injected via the tail vein in MC and NC groups. Four weeks after virus injection, LPS 10 mg/kg was intraperitoneally injected and 30 min later mtDNA 5 mg/kg was intraperitoneally injected in MS and MC groups. Blood samples were collected at 24 h after LPS injection for determination of serum creatine kinase-MB (CK-MB) and lactate dehydrogenase (LDH) activities (by biochemical assay), concentrations of serum cardiac troponin I (cTnI), interleukin-18 (IL-18) and interleukin-1beta (IL-1β)(by enzyme-linked immunesorbent assay), and expression of mtDNA (by quantitative real-time polymerase chain reaction). The animals were sacrificed after the end of blood sampling and myocardial tissues were obtained for determination of the contents of reactive oxygen species (ROS), total antioxidant capacity (T-AOC), and adenosine triphosphate (ATP) and expression of NOD-like receptor associated protein 3 (NLRP3), active subunit p20 of caspase-1 (caspase-1p20) and apoptosis-associated microprotein (ASC) in myocardial tissues (by Western blot) and for microscopic examination of the pathological changes after HE staining (with a light microscope). Results:Compared with N group, the levels of CK-MB, LDH, cTnI, IL-1β and IL-18 in serum were significantly increased, the expression of mtDNA was up-regulated, the ROS content in myocardial tissues was increased, the T-AOC and ATP contents in myocardial tissues were decreased, the expression of NLRP3, caspase-1p20 and ASC in the myocardial tissues was up-regulated( P<0.05), and the pathological changes of myocardial tissues were aggravated in L group and mtDNA group.Compared with L group and mtDNA group, the levels of CK-MB, LDH, cTnI, IL-1β and IL-18 in serum were significantly increased, the expression of mtDNA was up-regulated, the ROS content in myocardial tissues was increased, the T-AOC and ATP contents in myocardial tissues were decreased, the expression of NLRP3, caspase-1p20 and ASC in the myocardial tissues was up-regulated( P<0.05), and the pathological changes of myocardial tissues were aggravated in M group. Compared with M group, the levels of CK-MB, LDH, cTnI, IL-1β and IL-18 in serum were significantly decreased, the expression of mtDNA was down-regulated, the ROS content in myocardial tissues was decreased, the T-AOC and ATP contents in myocardial tissues were increased, the expression of NLRP3, caspase-1p20 and ASC in the myocardial tissues was down-regulated( P<0.05), and the pathological changes of myocardial tissues were significantly attenuated in MS group. Conclusions:Sestrin2 can reduce endotoxin-induced myocardial injury in mice by alleviating mitochondrial damage, inhibiting oxidative stress, protecting mtDNA from oxidative damage, and then inhibiting mtDNA-NLRP3 inflammasome pathway.

Osteosarcoma needs to continuously induce angiogenesis to satisfy its own nutritional supply in the process of development. Therefore, the inhibition of osteosarcoma cell-induced angiogenesis as a target has become a research hot in recent years. Currently, vascular inhibitors targeting mRNA-encoded protein have been applied in clinic, but the efficacy is poor. Non-coding RNA (ncRNA) is a type of RNA molecules that do not participate in protein coding. ncRNA can regulate the angiogenesis of osteosarcoma by regulating the secretion of vascular factors such as vascular endothelial growth factor, angiogenin-2 and hypoxia-inducible factor 1 or the interaction between ncRNAs. This article reviews the role of ncRNA in the angiogenesis of osteosarcoma to provide references for clinical targeted therapy strategies for osteosarcoma.

BACKGROUND:At present,research has only shown that the cervical lordosis ratio can be an important factor in predicting the loss of lordosis curvature after laminoplasty,and no one has studied whether the cervical lordosis ratio,a dynamic level indicator,can be one of the decision-making factors for the selection of posterior cervical surgical procedures. OBJECTIVE:To investigate whether the cervical lordosis ratio,an index of cervical hyperextension and hyperflexion,can be used as a selective index for laminoplasty and laminectomy fusion. METHODS:A retrospective review of 141 patients who had undergone posterior cervical surgery more than one year of follow-up due to multi-level cervical spondylotic myelopathy from December 2015 to March 2020 was performed.Among them,63 patients received laminectomy and fusion(laminectomy and fusion group)and 78 patients received laminoplasty(laminoplasty group).The demographic statistics(gender,age,body mass index,follow-up time),imaging indexes such as C2-7 Cobb angle,C2-7 range of motion,flexion Cobb angle,extension Cobb angle,flexion range of motion and extension range of motion,clinical effect indexes such as Japanese Orthopaedic Association score and visual analog scale score were compared between the two groups.The evaluation index of cervical lordosis alignment change was C2-7 Cobb angle difference before and after operation(ΔCL).Cervical lordosis ratio was equal to 100%×flexion range of motion/C2-7 range of motion.Receiver operating characteristic curve analysis was used to determine the role of cervical lordosis ratio in predicting postoperative severe cervical lordosis loss(ΔCL≤-10°).According to the critical value of cervical lordosis ratio(68.5%),all patients were divided into low cervical lordosis ratio group and high cervical lordosis ratio group.In these two ratio groups,the cervical lordosis alignment index and clinical effect index between the two operation groups were discussed again. RESULTS AND CONCLUSION:(1)Cervical lordosis alignment decreased after laminectomy and fusion and laminoplasty(P=0.039,P=0.002),and cervical lordosis alignment change in laminoplasty group(ΔCL)was greater than that of laminectomy and fusion group,and the difference between the two groups was statistically significant.(2)Based on receiver operating characteristic curve analysis,cervical lordosis ratio in predicting severe cervical lordosis alignment change(ΔCL≤-10°)had good identification ability(area under the curve=0.792).(3)In low cervical lordosis ratio group,there was no significant difference in cervical lordosis alignment change(ΔCL)between laminectomy and fusion group and laminoplasty group(P=0.141).(4)In high cervical lordosis ratio group,the ΔCL of laminoplasty group was greater than that in laminectomy and fusion group(P=0.001),which had a higher probability of postoperative severe cervical lordosis alignment change(ΔCL≤-10°)(43%,29%).(5)It is indicated that cervical lordosis ratio can be used as a decision-making index for the choice of posterior surgery for multi-level cervical spondylotic myelopathy.Laminoplasty can be considered in the low cervical lordosis ratio group,while laminectomy and fusion can be considered in the high cervical lordosis ratio group.