BACKGROUND:Open fractures often present soft-tissue defects, high-risk infection, and fracture with bone defect, often lead to more postoperative complication, defect of limb function, and bring great difficulties to clinical treatment. There is some controversy in the treatment of such fracture. Relevant animal experiment and clinical study become the hotspot in recent years. OBJECTIVE:To review some controversy about open fracture treatment and latest research. METHODS:A computer-based online search of China National Knowledge Infrastructure database and PubMed was performed for articles published from January 2005 to January 2015. Key words included “Open fracture, Evaluation and prognosis of injury, Antibiotics, Debirdement, Treatment of fracture, Wound repair”. More than 100 literatures were retrieved, and 47 articles met the inclusion criteria. RESULTS AND CONCLUSION:After a large number of animal experiments and clinical application, open fracture debridement, prevention of infection, implant selection and evaluation of prognosis had been deeply studied, especialy the study of implant treatment of bone defects. Metal three-dimensional printer has changed the traditional concept of implant. Nano titanium dioxide /PEEK bioactive composite materials have become a hot research in recent years.

Objective To observe the effects of treating acute ischemic stroke in rats with interventional administration of nitric oxide precurcer L-Arginine or nitric oxide donor nitroglycerin.Methods The right middle cerebral arteries of rats were occluded by insertion of a suture to duplicate ischemia-reperfusion models.Forty-two male SD rats were randomly divided into four groups: MCAO group(n=12);sham operation group(n=6);NG group(n=12) and L-ARG group(n=12),intracarotid arteries administrated respectively by NS、NS、NG and ARG.Each of the four groups were subdivided into 2 groups according to the reperfusion time(3 h and 24 h),measurement of Longa scores,NO2-/NO3-in serum,HE staining and immunohistochemical(SABC)method were utilized to assess the changes of ischemic brain tissues in different groups.Results OX-42 positive cells of cortex and CA3 area of hippocampal: OX-42 positive cells were found,their features identified at 3 h after reperfusion.24 h the response of microglias was obvious,the number of the cells increased(P

BACKGROUND: Radix astragali has the effect of protecting cells from damage in ischemic reperfusion, whether pre-treatment with radix astragali can protect myocardial eells from apoptosis in ischemic reperfusion ? OBJECTIVE: To investigate the effect of pre-treatment with radix astragali on apoptosis and its relative genes in rats with ischemic myocardial reperfusion DESIGN: A randomized and controlled trial taking Wistar rats as experimental subjects.SETTING: The Basic Medical Department of Chengde Medical College and the Geriatric Department of the Affiliated Hospital.MATERIALS: The experiment was completed in the Imunnohistochemical Laboratory of Basic Medical Institute in Chengde Medical College from February to December in 2004. A total of 30 healthy male Wistar rats were selected, and at random classified as groups of radix astragali pre-treated (radix astragali), ischemic reperfusion and psuedo-operated (control), 10 rats for each group.METHODS: Radix astragali injection was given peritonealy for rats in radix astragali pre-treated group before operation, and the equivalent normai saline was given for those in ischemic reperfusion and psuedo-operated groups. One week later, the model of ischemic reperfusion was set up. After operation the myocardia in marginal zone of ischemic reperfusion were sampled, and the myocardia of the corresponding zone were taken for control group. The method of terminal (TdT)-mediated dUTP-biotin nick end labeling (TUNEL) was used for assay of myocardial apoptosis rate, and the ABC immunohistochemical method was used for assay of myocardial bcl-2 (inhibiting apoptosis gene) and bax (promoting apoptosis gene).MAIN OUTCOME MEASURES: Apoptosis rates, and expression of bcl2 and bax genes of myocardia RESULTS: ① Apoptosis rate of myocardial cells: The rate in radix astragali group was decreased compared with that in ischemic reperfusion group [ (14.06 ±9.97) ％, (19.34±12.30) ％, t = 1.863, P ＜ 0.05].② Expression of bcl-2: There was no significant difference between radix astragali and ischemic reperfusion groups[(9.14±4.46) ％, (8.99±4.54) ％, P ＜ 0.05].③ Expression of bax: The expression in radix astragali group was decreased compared with that in ischemic reperfusion group [(12.65 ±7.23)％,(18.12±7.92) ％, t = 2.096, P ＜ 0.05]CONCLUSION: Pre-treatment with radix astragali can down-regulate the expression of promoting apoptosis gene so as to reduce the rate of myocardial cell apoptosis, hence it can protect the myocardial cells in ischemic reperfusion.

BACKGROUND:In recent years, animal models of lumbar disc degeneration have been popularized to explore the effect of tissue engineering, cel engineering and genetic engineering technologies on intervertebral disc degeneration.
OBJECTIVE: To investigate the influence of biological patches on rabbit anulus fibrosus repair.
METHODS:L3-4, L4-5, L5-6 segments from rabbits were randomly divided into normal control group (the intervertebral disc was exposed correspondingly), control group (the annulus fibrosus was only cut with a surgical scalpel) and experimental group (the annulus fibrosus was cut and sutured with the surgical biomaterial). Six rabbits were selected randomly to take the lumbar X-ray and MRI preoperatively and 1, 2, 4, 8, 12 weeks postoperatively; one rabbit was chosen preoperatively and three rabbits selected respectively at 1, 2, 4, 8, 12 weeks postoperatively to execute hematoxylin-eosin and type II colagen immunohistochemistry.
RESULTS AND CONCLUSION:At postoperative 1, 2 and 4 weeks, the disc height index decreased significantly in the control and experimental groups. MRI and histopathological examination showed that the T2WI signal intensity and hematoxylin-eosin grading were both increased significantly in the control and experimental groups at 2 weeks after surgery (P < 0.05). With time, the number of nucleus pulposus cels gradualy reduced in the control and experimental groups. Annulus fibrosus defects were filed with granulation and fibrous tissues, and the biofilm was tightly fused with the annulus fibrosus. Findings from the type II colagen immunohistochemical staining showed that the histological staining of the nucleus pulposus was gradualy changed from positive to negative in the experimental and control groups. Therefore, cutting the annulus fibrosus can lead to severe disc degeneration at early period, and surgical biomaterials can be integrated with the annulus fibrosus wel to seal annulus fibrosus defects and further prevent nucleus pulposus protrusion. However, this approach cannot restrain the continuous process of disc degeneration.

Objective To understand current status and influencing factors of long-term care for elderly people who lived in rural areas of Beijing.Methods A total of 1022 elderly people (age＞60 years old) were enrolled in this cross-sectional study during December,2012 and January,2013.Demographic information,health status and needs of and intent to long-term care were learned through a questionaire survey.Chi-square test and muhiple non-conditional logistic regression analysis were used to identify the factors that were related to the respondents' selection.Results Nearly 6.6％ (61/1016) participants showed needs for long-term care.82.3％ (841/1013) respondents preferred household-based long-term care,while 7.53％ (77/1013) preferred community-based long-term care.In single factor analysis,education level,occupation,household income,living conditions,number of children living together,medical insurance,pension insurance,chronic diseases and self-report hearing ability,taste and touch were related with longterm care needs (x2values were 33.03,136.17,99.32,88.83,58.07,147.71,108.11,9.85,33.78,30.45 and 22.22,respectively; all P＜0.05).Multivariate analysis showed that occupation,income per capita,spouses living conditions,new corporative medical systems and self-report visual status were correlated with household-based long-term care (odds ratio (OR) were 2.48 (95％ confidence interval (CI) 1.21-5.10),0.82(0.71-0.95),1.64 (1.08-2.49),4.78 (2.93-7.82) and 0.72 (0.59-0.89),respectively).Conclusion Householdbased long-term care and health management system may be needed and chosen by the elderly living in rural areas of Beijing.

Objective To evaluate the efficacy of the intensity modulated radiotherapy in early stage cervical cancer with vaginal stump recurrence after surgery.Methods A retrospective concurrent comparative study included 60 patients with vaginal recurrence after surgery in early stage cervical cancer.30 cases of the experimental group were treated with intensity-modulated radiotherapy (IMRT),and 30 cases of the control group were treated with conventional radiotherapy.The efficacy and complications between two groups were compared after 3 treatment cycles.Results Of 30 patients in experimental group,22 patients achieved complete remission,7 had partial and 1 progressed.But in the control group,14 had complete remission,5 reached partial remission,7 were stable and 4 progressed.The effective rates were 96.67 ％ (29/30) and 63.33 ％ (19/30),respectively,in the experimental and control group,which showed statistical significance (P =0.009).In the experimental group,there were 1 case with grade 1 radiation cystitis and 1 case with grade 1 radiation proctitis.In the control group,there were 3 cases of vaginal-rectal fistula,1 case of grade 3 radiation proctitis,2 cases of grade 2 radiation cystitis and 2 cases of grade 1 radiation proctitis.Conclusions IMRT for treating vaginal recurrence of early cervical cancer achieves satisfactory short-term effect.In comparison with conventional radiotherapy,IMRT has higher efficacy but less side effects.

Objective:To study the biological characteristics of condylar chondrocytes isolated from mechanical stress stimulated TMJ condylar cartilage of rats.Methods:The rat models of mechanical stress stimulated condylar cartilage were made by class III orthope-dic force for 14 days.The cartilage from control and experimental rats were observed in gross view.The cell harvest rate and viability were examined,proteomic analysis was performed.Results:After stress stimulation the thickness,the elasticity of condylar cartilage and number of chondrocytes were significantly reduced.The weight of mandibular cartilage was decreased(P<0.01).The harvest rate and the viability rate of the cells were decreased(P<0.01).The chondrocytes in the experimental group appeared to be elongated. Proteomic analysis showed that stress-related proteins,signal transduction proteins were up-regulated;cytoskeleton proteins,cell prolif-erative proteins were down-regulated.Conclusion:Mechanical stress stimulation of condylar cartilage may result in biological activity and protein changes of the condylar cartilage chondrocytes.

Objective To construct the prokaryotic vector and to express a novel candidate gene IDD01 associated with hepatocellular carcinoma (HCC) for its functional study. Methods The open reading frame (ORF) of IDD01, amplified from HCC tissue by RT PCR, was inserted into the expression vector pMAL c2X. The recombinant vector was transformed into E. coli TB1, and the expression products were analyzed by SDS PAGE. Results The length of PCR product was about 770 bp. The restriction enzyme digestion and sequencing conformed that the gene segment was correctly inserted into the vector. SDS PAGE and density scanning indicated that the protein was expressed as a fusion protein with 28 KD of molecular weight and the fusion protein possessed 30.4% of the total bacterial protein. Conclusion The recombinant vector is constructed successfully and IDD01 can be expressed at a high level, which lays a foundation for the further research on the functions of IDD01 gene.

Objective To investigate the protective effect of Xinyi capsule pretreatment on myocardial ischemia reperfusion injury in rabbits and its possible mechanism. Methods Ninety-four rabbits were randomly divided into 6 groups: model group (n=16), tirofiban group (n=16), high-, medium- and low-dose Xinyi capsule groups (4.0, 2.0, 1.0 g/kg;n=16 in each group), and sham operation group (n=14). Five days after intragastric administration with drug, myocardial ischemia reperfusion was induced by ligation of the proximal left circumflex artery. The electrocardiogram (ECG) was continuously recorded. The serum levels of myeloperoxidase (MPO), lactate dehydrogenase (LDH) and creatine kinase-MB (CK-MB) were measured. Myocardial histopathological damage was evaluated. Results The changes of J-point amplitude on ECG in high-, medium-and low-dose Xinyi capsule groups (0.064 ± 0.049 mV, 0.069 ± 0.061 mV, 0.079 ± 0.060 mV) were significantly lower than that in the model group (0.158 ± 0.105 mV, P<0.01 or P<0.05), the serum levels of LDH (399.7 ± 202.3 U/L, 369.6 ± 229.0 U/L, 435.5 ± 152.4 U/L), CK-MB (900.8 ± 231.2 U/L, 1 268.3 ± 899.8 U/L, 1 386.7 ± 621.6 U/L), MPO (69.81 ± 5.51 U/L, 85.44 ± 10.31 U/L, 81.33 ± 16.87 U/L) were significantly lower than those in the model group (LDH:817.1 ± 401.9 U/L, CK-MB:2 071.3 ± 693.5 U/L, MPO:149.9 ± 20.11 U/L;P<0.01 or P<0.05). Histopathological examination showed that myocardial damage in high-, medium- and low-dose Xinyi capsule groups reduced compared with the model group. Conclusions Xinyi capsule pretreatment can protect against myocardial ischemia reperfusion injury in rabbits, and its mechanism may be related to inflammation inhibition.

Objective To evaluate the potential value of IgG antibodies against recombinant PPE65 protein (rPPE65) of Mycobacterium tuberculosis in serodiagnosis of tuberculosis.Methods The gene encoding PPE65 protein of M.tuberculosis was cloned into the PET-28a vector and then expressed in Escherichia coli.The rPPE65 was purified with Ni-NTA affinity and ion exchange chromatography.After dialysis renaturation, the concentration of rPPE65 was determined using Lowry assay.ELISA was used to detect the levels of specific IgG against rPPE65 and recombinant PstS1 protein (rPstS1) in sera from 144 patients with pulmonary tuberculosis (PTB patients), 144 health controls, and 56 patients with non-tuberculosis pulmonary diseases.ROC curves were used to determine cut-off values with the results of IgG antibodies against rPPE65 and rPstS1 for 144 PTB patients and 97 controls with negative PPD skin test.The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of rPPE65 and the combination of rPPE65 and rPstS1 were counted.Results The PPE65 protein of M.tuberculosis was successfully expressed in E.coli. The purity and concentration of rPPE65 were 95% and 0.5 mg/ml, respectively.ROC analysis showed that the cut-off of ELISA using rPPE65 was 0.64.The sensitivity, specificity, PPV, NPV, and accuracy of rPPE65 were 34.7%(50/144), 93.5%(187/200), 79.4%(50/63), 66.5%(187/287), and 68.9%(237/344), respectively.The sensitivity, specificity, PPV, NPV, and accuracy of the combination of rPPE65 and rPstS1 were 59.0%, 91.0%, 82.5%, 75.5%, 77.6%, respectively.Conclusions The rPPE65 of M.tuberculosis appears to be a candidate antigen for serodiagnosis of tuberculosis.Detection of IgG antibodies against the combination of rPPE65 and rPstS1 can increase the sensitivity of serological test for tuberculosis.