预防性应用不同剂量甲基强的松龙对缺血再灌注损伤大鼠脊髓热休克蛋白27表达的不同影响

目的 研究预防性运用不同剂量甲基强的松龙(MP)对脊髓缺血再灌注损伤(SCII)后热休克蛋白27(Hsp27)表达的不同影响,探讨运用MP预防SCII的最佳剂量.方法 随机将100只大鼠平均分成A、 B、 C、 D、 E五组,采用夹闭腹主动脉后再灌注的方法建立大鼠SCII模型.A组不夹闭腹主动脉,余组用上述方法制SCII模型,C、D、E三组在术前30 min分别预防性应用10、20、30 mg/kg MP,B组给予同等剂量生理盐水,都通过尾静脉注射给药.3 h后取各组大白鼠脊髓标本,行HE染色观察,并用免疫组化的方法测量Hsp27的相对含量.结果 E组大鼠神经元的形态改善最明显.E组Hsp27的表达量最高,五组之间总体上差异有统计学意义(P<0.05).结论 预防性运用30 mg/kg MP可使对脊髓缺血再灌注损伤具有保护作用的Hsp27表达上调最明显,减少脊髓缺血再灌注损伤效果最好.     

甲泼尼龙预干预脊髓缺血再灌注损伤对热休克蛋白27和肿瘤坏死因子α表达的影响

Objective To observe the effect of methylprednisolone (MP) pre-intervention on ex-pressions of heat shock protein 27 (HSP27) and tumor necrosis factor alpha (TNF-α) in cells in rat spinal cord following ischemia-reperfusion injury. Methods One hundred and fifty male Sprague-Dawley (SD) rats were randomly divided into 3 equal groups: group A (control) in which the abdominal aorta was exposed without any treatment, group B in which the abdominal aorta was clipped for 30 minutes before reperfusion for 3 bours to establish a model of ischemia- reperfusion injury, and group C in which intravenous MP injection was conducted 30 minutes before the establishment of the ischemia-reperfusion injury model. Three hours later the spinal cords were harvested. Pathological changes of spinal cord cells were observed with HE staining and expressions of HSP27 and TNF-α in spinal cord cells were observed with immunohistochemical staining. The motor function of hind-limbs before was evaluated before sample harvest. The data were analyzed with SPSS software. Results There were significant differences between groups A and B in the expressions of TNF-α and HSP27. Compared with group B, the expression of TNF-α decreased and HSP27 increased in group C, with statistically significant differences between the 2 groups. The motor function score of hind-limbs decreased in group B but improved in group C. Conclusions Since MP can decrease the expression of TNF-α and up-regulate the expression of HSP27, it has a potency of neuro-protection. Spinal cord ischemia-reperfusion injury can be avoided or decreased after MP pre-intervention.     

大鼠脊髓缺血再灌注损伤后甲基强的松龙对肿瘤坏死因子－α表达的影响

目的研究大鼠脊髓缺血再灌注损伤（SCⅡ）后肿瘤坏死因子－α（TNF—d）的表达及甲基强的松龙（MP）预干预对TNF－α【表达的影响。方法健康雄性SD大鼠150只随机分成3组：对照组（n=50）仅手术暴露腹主动脉,不做进一步处理;脊髓缺血再灌注损伤纽（SCⅡ组）（n=50）建立SCⅡ模型,夹闭腹主动脉30min后松开,再灌注3h;甲基强的松龙组（MP组）（n=50）于建立SCⅡ模型前30min尾部静脉注射MP（30mg／kg）,而A组和B组于术前30min分别注入等量的生理盐水。3组均取腰段脊髓标本,观察损伤节段脊髓病理形态学变化,用免疫组织化学染色方法观察脊髓组织TNF－α的表达,并对大鼠后肢运动功能进行评分。采用SPSS10．0软件对数据进行统计学处理。结果①SCⅡ组脊髓组织内TNF—d呈高表达,与对照组相比差异有统计学意义（P〈0．05）。②MP组脊髓细胞内TNF－α表达明显降低,与SCⅡ组对比差异有统计学意义（P〈0．05）。③大鼠脊髓缺血再灌注损伤后后肢功能评分降低,MP组后肢运动功能评分提高。结论①SCⅡ后脊髓细胞TNF－α呈高表达。②预防应用MP可降低TNF－α的表达,也即预防应用MP能减轻脊髓缺血再灌注损伤,保护脊髓神经功能。     

后路经椎弓根半椎体切除融合内固定治疗半椎体畸形

目的 评价后路经椎弓根半椎体切除、植骨内固定治疗半椎体畸形的疗效.方法 回顾性分析2007年6月至2009年6月共30例接受经椎弓根半椎体切除、植骨内固定治疗的先天性半椎体畸形病例,比较术前、术后脊柱全长正侧位片及脊柱侧凸Cobb角.结果 术前冠状面主弯Cobb角平均46.52°,术后Cobb角14.64°,侧凸平均矫正率68.51%,术前术后主弯Cobb角比较差异有统计学意义(P<0.05);无内固定断裂、出现神经症状病例.结论 后路经椎弓根半椎体切除、融合内固定治疗半椎体畸形可有效地矫正畸形.     

甲泼尼龙预干预脊髓缺血再灌注损伤对热休克蛋白27和肿瘤坏死因子α表达的影响

Objective To observe the effect of methylprednisolone (MP) pre-intervention on ex-pressions of heat shock protein 27 (HSP27) and tumor necrosis factor alpha (TNF-α) in cells in rat spinal cord following ischemia-reperfusion injury. Methods One hundred and fifty male Sprague-Dawley (SD) rats were randomly divided into 3 equal groups: group A (control) in which the abdominal aorta was exposed without any treatment, group B in which the abdominal aorta was clipped for 30 minutes before reperfusion for 3 bours to establish a model of ischemia- reperfusion injury, and group C in which intravenous MP injection was conducted 30 minutes before the establishment of the ischemia-reperfusion injury model. Three hours later the spinal cords were harvested. Pathological changes of spinal cord cells were observed with HE staining and expressions of HSP27 and TNF-α in spinal cord cells were observed with immunohistochemical staining. The motor function of hind-limbs before was evaluated before sample harvest. The data were analyzed with SPSS software. Results There were significant differences between groups A and B in the expressions of TNF-α and HSP27. Compared with group B, the expression of TNF-α decreased and HSP27 increased in group C, with statistically significant differences between the 2 groups. The motor function score of hind-limbs decreased in group B but improved in group C. Conclusions Since MP can decrease the expression of TNF-α and up-regulate the expression of HSP27, it has a potency of neuro-protection. Spinal cord ischemia-reperfusion injury can be avoided or decreased after MP pre-intervention.     

甲泼尼龙预干预脊髓缺血再灌注损伤对热休克蛋白27和肿瘤坏死因子α表达的影响

Objective To observe the effect of methylprednisolone (MP) pre-intervention on ex-pressions of heat shock protein 27 (HSP27) and tumor necrosis factor alpha (TNF-α) in cells in rat spinal cord following ischemia-reperfusion injury. Methods One hundred and fifty male Sprague-Dawley (SD) rats were randomly divided into 3 equal groups: group A (control) in which the abdominal aorta was exposed without any treatment, group B in which the abdominal aorta was clipped for 30 minutes before reperfusion for 3 bours to establish a model of ischemia- reperfusion injury, and group C in which intravenous MP injection was conducted 30 minutes before the establishment of the ischemia-reperfusion injury model. Three hours later the spinal cords were harvested. Pathological changes of spinal cord cells were observed with HE staining and expressions of HSP27 and TNF-α in spinal cord cells were observed with immunohistochemical staining. The motor function of hind-limbs before was evaluated before sample harvest. The data were analyzed with SPSS software. Results There were significant differences between groups A and B in the expressions of TNF-α and HSP27. Compared with group B, the expression of TNF-α decreased and HSP27 increased in group C, with statistically significant differences between the 2 groups. The motor function score of hind-limbs decreased in group B but improved in group C. Conclusions Since MP can decrease the expression of TNF-α and up-regulate the expression of HSP27, it has a potency of neuro-protection. Spinal cord ischemia-reperfusion injury can be avoided or decreased after MP pre-intervention.     

后路椎弓根螺钉复位椎间融合内固定治疗腰椎滑脱的临床研究

目的 研究腰椎滑脱后路椎弓根螺钉复位椎间融合内固定术的临床效果.方法 腰椎滑脱者38例,男18例,女20例,采用后路UPASS椎弓根螺钉复位椎体间椎间融合器(cage)植入融合内固定治疗.结果 术后随访6～24个月,平均18个月,滑脱的复位率为91%,融合率为94.9%,无再滑脱现象.结论 后路椎弓根螺钉复位椎间融合内固定术治疗腰椎滑脱,内固定稳定可靠,符合生物力学规律,椎体间融合良好,效果好.     

Pilon骨折的手术治疗体会

目的 探讨Pilon骨折的治疗方法和影响疗效的因素.方法 对36 例不同类型(Ruedi-Allgow er 分型) 的Pilon骨折患者选用保守治疗、有限内固定、坚强内固定、有限内固定结合外固定架治疗,并分析其疗效.结果 随访6个月～2 年,参照Helfet 提出的标准判断,总优良率为80.1%,胫距关节面达到解剖复位的骨折的疗效优良率达89.6%.结论 临床疗效与骨折类型、治疗方法有关,早期解剖复位和坚强内固定是治疗的关键.     

甲泼尼龙预干预脊髓缺血再灌注损伤对热休克蛋白27和肿瘤坏死因子α表达的影响

Objective To observe the effect of methylprednisolone (MP) pre-intervention on ex-pressions of heat shock protein 27 (HSP27) and tumor necrosis factor alpha (TNF-α) in cells in rat spinal cord following ischemia-reperfusion injury. Methods One hundred and fifty male Sprague-Dawley (SD) rats were randomly divided into 3 equal groups: group A (control) in which the abdominal aorta was exposed without any treatment, group B in which the abdominal aorta was clipped for 30 minutes before reperfusion for 3 bours to establish a model of ischemia- reperfusion injury, and group C in which intravenous MP injection was conducted 30 minutes before the establishment of the ischemia-reperfusion injury model. Three hours later the spinal cords were harvested. Pathological changes of spinal cord cells were observed with HE staining and expressions of HSP27 and TNF-α in spinal cord cells were observed with immunohistochemical staining. The motor function of hind-limbs before was evaluated before sample harvest. The data were analyzed with SPSS software. Results There were significant differences between groups A and B in the expressions of TNF-α and HSP27. Compared with group B, the expression of TNF-α decreased and HSP27 increased in group C, with statistically significant differences between the 2 groups. The motor function score of hind-limbs decreased in group B but improved in group C. Conclusions Since MP can decrease the expression of TNF-α and up-regulate the expression of HSP27, it has a potency of neuro-protection. Spinal cord ischemia-reperfusion injury can be avoided or decreased after MP pre-intervention.     

甲泼尼龙预干预脊髓缺血再灌注损伤对热休克蛋白27和肿瘤坏死因子α表达的影响

Objective To observe the effect of methylprednisolone (MP) pre-intervention on ex-pressions of heat shock protein 27 (HSP27) and tumor necrosis factor alpha (TNF-α) in cells in rat spinal cord following ischemia-reperfusion injury. Methods One hundred and fifty male Sprague-Dawley (SD) rats were randomly divided into 3 equal groups: group A (control) in which the abdominal aorta was exposed without any treatment, group B in which the abdominal aorta was clipped for 30 minutes before reperfusion for 3 bours to establish a model of ischemia- reperfusion injury, and group C in which intravenous MP injection was conducted 30 minutes before the establishment of the ischemia-reperfusion injury model. Three hours later the spinal cords were harvested. Pathological changes of spinal cord cells were observed with HE staining and expressions of HSP27 and TNF-α in spinal cord cells were observed with immunohistochemical staining. The motor function of hind-limbs before was evaluated before sample harvest. The data were analyzed with SPSS software. Results There were significant differences between groups A and B in the expressions of TNF-α and HSP27. Compared with group B, the expression of TNF-α decreased and HSP27 increased in group C, with statistically significant differences between the 2 groups. The motor function score of hind-limbs decreased in group B but improved in group C. Conclusions Since MP can decrease the expression of TNF-α and up-regulate the expression of HSP27, it has a potency of neuro-protection. Spinal cord ischemia-reperfusion injury can be avoided or decreased after MP pre-intervention.