BACKGROUND: Animal experiments show that hormone can induce femoral capillaries poor filling, decrease capillaries density in unit area, and reduce capillaries in cancellous bone inferior to cartilage. However, the involved mechanism remains unclear.OBJECTIVE: To explore the changes of vascular endothelial growth factor (VEGF) during the progress of glucocorticoid induced osteonecrosis.METHODS: The Chinese white rabbits were randomly divided into horse serum plus prednisone group and pradnisone alone group. Typical osteonecrosis model was established by Matsui Method. 10 mL/kg horse serum was injected into horse serum plusprednisone group through the ear margin veins, followed by additional injection after 2 weeks and intraparit0neal injection of prednisone, 45 mg/kg per day for 5 consecutive days. The control group was only subjected to prednisona, 45 mg/kg per day for 5 consecutive days. The VEGF expression was observed by means of reverse transcription polymerase chain react.ion (RT-PCR)before, 7, 14 days after administration, 1, 3, 7, 21, 35 and 49 days following the first application of hormone. The capillaries were quantified.RESULTS ANDCONCLUSION: The VEGF was significantly increased 7 days following horse serum, and gradually decreased to levels before treatment 1 days following hormone. The VEGF mRNA, expression decreased with increasing hormone treatment, in particular at 7 and 21 days (P ＜ 0.05), but cannot restore to normal level. Micrevascular count was decreased gradually, and at 21 days decreased to the minimum, positively correlated with VEGF expression. Results show that adrenal glucocorticoid inhibited VEGF expression in bone tissue and restrained angiogenesis, resulting in ischemia and hypoxia of the local environment in bone tissue. VEGF expression highly correlates with microvascular count and osteonecrosis degree.

BACKGROUND:Rehabilitation outcomes of patients with spinal cord injury are associated with degree of injury, therapeutic method, recovery time and subsequent treatment. Multidisciplinary, comprehensive, specialized rehabilitation unit can provide a better recovery after spinal cord injury. OBJECTIVE:To review the effect or combined effect of rehabilitation units after spinal cord injury. METHODS:A computer-based search of Springer and PubMed databases was done using the keywords of“spinal cord injury, rehabilitation practice, outcomes”, which appeared in the title and abstract. Final y, 44 English papers were included in result analysis. RESULTS AND CONCLUSION:Based on practical evidence, various rehabilitation practices are recognized, and then, the relevant information is connected with the outcomes to evaluate the efficacy of rehabilitation interventions. Studies have shown that age had no influence on rehabilitation outcomes in traumatic and non-traumatic mixed samples, and there is also little difference in the rehabilitation outcomes between male and female. Incidence of complications is lowest in the vast majority of patients with spinal cord injury who are initial y admitted to a specialist center of spinal cord injury. The hospital stay can be shorten in patients who can be admitted to a multidisciplinary, comprehensive, specialized division of spinal cord injury as early as possible. Patients who can receive regular, comprehensive outpatient fol ow-up show no significant differences in health perception, independence and depression, but the frequency and degree of certain secondary situations can be significantly reduced.

Objective To investigate the effects of the platelet activation and the endothelial cell impairment on the osteonecrosis. Methods The contents of TXB2,6-keto-PGF1a, GMP-140 and TM in different periods of animal models of adrenoglucocortisone-induced osteonerosis were measured by the radio-immunity method. ResultsThe contents in group B increased dramatically from 24h after the injection of adrenoglucocortisone, and the contents of GMP-140 and TM from 3d after injection increased with significant difference from group A. Conclusion The results suggest that the early emergence of the platelet activation and endothelial cell impairment models induced by horse serum and adrenoglucocortisone plays a role in the formation of the osteonecrosis.

Objective To observe the expression of vascular endothelial growth factor (VEGF) in synovial tissue during treatment of rabbit arthritis model with corticosteroids and explore its mechanism.Methods The expression and alteration of VEGF in different periods of treatment process of rabbit arthritis model with corticosteroids (after 1 h ,24 h,3,7,14,21 and 28 d treatment with lipopolysaccharide),were investigated by reverse transcript polymerase chain reaction (RT PCR).Results There were different expressive degrees of VEGF in synovial tissue during each period of the process of rabbit arthritis model by corticosteroid treatment and the expressive degree of VEGF had been strongly inhibited by corticosteroids.Conclusion It is indicated that corticosteroids decrease inflammatory reaction of arthritis by inhibiting the expression of VEGF.

Objective To study the effect of flushing the pelvis with normal saline at constant pressure on renal function to provide a theoretical basis of pathogenesis of renal injury during endoscopic procedures. Method Fifty rabbits underwent tube ureterocutaneostomy as a method of urinary diversion, the flushing group perfused immediately after ureterocutaneostomy, and the intrapelvic pressure is 60, 80, 100, 120cmH_2O, but the sham-operated group didn′t flush. Urinary protein excretion were examined every day after operation,we also got pathological examination of nephridial tissue continually. The urinary protein include immunoglobulin G, microalbuminuria and ?_2-microglobulin. Result All the flushed rabbits had the change of urinary protein, the difference of urinary protein was of statistical significance between the before and the first day after treatment(P

[Objective]To evaluate the effect of bone mesenchymal stem cells(BMSCs) on healing of tendon-bone junction in a bone tunnel and to provide experimental evidence of labeling and tracing the stem cell.[Method]BMSCs from rats were harvested by adherent separation screening method and labeled by SPIO and DiI.Thirty-nine 8-week-old rats were randomly divided into two groups,21 rats injected with double-labeled BMSCs and Pluronic F-127 as experimental group and 18 rats injected with Pluronic F-127 alone as control group.In each group,biomechanical analysis was carried out to assess the effect of healing at 2,4 and 8 weeks.The transplanted BMSCs were traced by fluorescence microscope at 2,4,8 weeks and 7.0T MR instantly,3 and 7days after operation.[Result]BMSCs were labeled effectively by SPIO and DiI.DiI-labeled positive cells were observed between tendon and bone with fluorescence microscope at 2,4 and 8 weeks.No significant signal changes of tendon-bone interface could be observed by 7.0 T MR.Biomechanically,maximum pullout load had no statistical difference between experimental group and control group at 2 weeks.At 4 and 8 weeks,the experimental group had significantly higher maximum pullout load compared with control group(P

Objective To investigate the serum levels of hepatocyte growth factor (HGF) and granulocyte macrophage-colony stimulating factor (GM-CSF) in patients with psoriasis. Methods Serum samples were collected from 68 patients with psoriasis vulgaris and 42 healthy controls. The serum concentrations of HGF and GM-CSF were measured by a dual antibody sandwich enzyme-linked immunosorbent assay (ELISA). Clinical severity of psoriasis vulgaris was assessed by psoriasis area and severity index (PASI) score. Results Serum concentration of HGF of patients with psoriasis vulgaris in progressive stage (653.35 ? 109.26 pg/mL) was significantly higher than that of the normal controls (353.85 ? 162.63 pg/mL) (P 0.05). The serum concentration of GM-CSF was significantly higher in the patients with psoriasis vulgaris of progressive stage (115.95 ? 25.72 pg/mL) than that in the patients of stable stage (68.28 ? 24.22 pg/mL) (P

The outcome of spinal cord injury is related to many factors, such as mechanism and severity of injury, and differences of individual. The standard of clinical trial plays a very important role in the reliability of the research. especially the inclusion and exclusion criterias, ethical issues, treatment standardization, informed consent and other issues. The effect of these factors on the clinical trial of spinal cord injury was summarized in this article. The inclusion and exclusion criterias to control the consistency should be developed based on the specific research content. Informed consent for clinical trial is also necessary, especially to the clinical trials with uncertainly benefits and risks, as well as the standardization of the operation procedures and rehabilitation treatment.

Objective To explore the correlation of peritumoral brain edema( PTBE)size,histologi-cal grades and the expression rate of Ki-67 in gliomas. Methods The data and specimens about 74 cases of gliomas in People's Hospital of Xinjiang Uygur Autonomous Region during 2010-2013 were collected. All cases were confirmed by surgery and pathology. According to preoperative MRI,PTBE was graded. Immunohisto-chemical discriminate the expression of Ki-67. HE coloration distinguish the histological grades. Results In this study,90. 54%(67/74)patients occured PTBE,the incidence of PTBE inⅠ,Ⅱ,Ⅲ,Ⅳlevel of groups were 100%(3/3),78. 95%(15/19),83. 33%(15/18),100%(34/34). Ki-67 expression was positive in 75. 68%(56/74)patients,and the rates were 0,36. 84%(7/19),94. 44%(17/18),94. 12%(32/34) in Ⅰ,Ⅱ,Ⅲ,Ⅳ level of groups. The expression rate of Ki-67 was 57. 14%(4/7),60. 00%(6/10),and 80. 70%(46/57)in normal group,Ⅰ-level groups of PTBE,Ⅱ-level groups of PTBE. The result of Kruskal-Wallis H showed that the PTBE from different grades was statistically significant(H=11. 304,P=0. 010). The expression rate of Ki-67 in different grade gliomas was statistically significant(H=38. 530,P﹤0. 05), The difference of expression Ki-67 in gliomas of different PTBE was statistically significant( H=6. 478,P=0. 039). The result of Spearman rank correlation analysis showed that the PTBE level increased with the histo-logical grade up in gliomas(r=0. 385,P=0. 001). The expression rate of Ki-67 increased with the histologi-cal grade up in gliomas(r=0. 692,P﹤0. 05),and the expression rate of Ki-67 increased with the degree of PTBE up in glomas( r =0. 256,P =0. 028 ). Conclusion Accorrding to the PTBE size,the histological grades and proliferation ability of glioma can be judged pre-operation. Ki-67 can be used as the indicator of pro-liferation activity of tumor,and also be used as the important basis of histological grades.

Objectives To investigate the methods of protecting external branch of the superior laryngeal nerve (EBSLN)in carotid endarterectomy and to observe the effect of using these methods in clinical surgery. Methods EBSLN (20 sides)of 10 heads of corpse were studied by using microanatomy from January 2013 to December 2013. The occurrence probability of EBSLN on the lower edge of posterior belly of digastric muscle,medial edge of external carotid artery and upper edge of superior thyroid artery in anatomy triangle was analyzed. The distances from the midpoint of the EBSLN to carotid bifurcation, mandibular angle and mastoid tip were measured. Sixty-five patients with carotid endarterectomy in Tianjin Huanhu Hospital from December 2013 to November 2014 were treated with the protective methods of the relevant EBSLN by using anatomy triangle as a mark. Whether the patients had injury symptoms of EBSLN were followed up after procedure. Results (1)The occurrence probability of 20-side EBSLN in anatomy triangle was 95%(19 sides). The midpoint of EBSLN in the anatomy triangle at the posterior mandibular angle was median 0. 34 (-1. 62 to 2. 43)cm,at the inferior mandibular angle was 1. 28 (-1. 33 to 3. 42) cm,at anterior mastoid tip was 2. 84 (0. 51 to 5. 14)cm,at inferior was 4. 51 (2. 82 to 6. 39)cm,and at anterior superior of the carotid bifurcation was 1. 64 (0. 57 to 3. 78)cm. (2)65 patients who underwent carotid endarterectomy used the protective methods of intraoperative EBSLN. There was no manifestation of EBSLN injury at 3 weeks to 9 months after procedure. Conclusion In carotid endarterectomy,taking an anatomic triangle as a symbol,it is no more than 2 cm of the anterior superior of carotid bifurcation during the separation process. As for the patients with higher or lower position of carotid bifurcation,in the range of crossing rear mandibular angle 0. 50 cm or below the mastoid tip 4. 50 cm for arterial separation should be avoided,and this can effectively protect EBSLN.