共查询到20条相似文献,搜索用时 31 毫秒
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New Minimally Invasive Model of Spinal Cord Ischemia in Rats 总被引:4,自引:0,他引:4
Sufianova GZ Usov LA Sufianov AA Shapkin AG Raevskaya LY 《Bulletin of experimental biology and medicine》2002,133(1):98-101
We developed a new minimally invasive model of spinal cord ischemia in rats: intravascular occlusion of the abdominal aorta and its branches. This model can be used on small laboratory animals and allows qualitatively and quantitatively evaluating the morphofunctional state of the nervous system during spinal cord ischemia by clinical manifestations and histological changes. Selective intravascular occlusion determines minimal invasiveness and adequacy of the proposed model to in vivo pathological processes. This model of spinal cord ischemia can be used in experimental pharmacology for evaluation of neuroprotective activity of various drugs and bioactive substances. 相似文献
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V. A. Volchkov V. I. Strashnov V. V. Tomson N. V. Boikova A. A. Zaitsev 《Bulletin of experimental biology and medicine》2001,132(3):902-906
Morphological and histoenzymatic changes in cells of the spinal cord and spinal ganglia after epidural injection of a combination of prosidol with clonidine were studied on dogs. No pathological structural and metabolic changes in the nervous tissue were found after combined treatment with the test drugs. Higher activity of nucleic acids and alkaline phosphatase in spinal neurons and spinal ganglion in experimental animals in comparison with those in controls indicates intensification of protein synthesis and active transport in the endothelium of nerve tissue capillaries, which is a favorable factor. 相似文献
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Boikova NV Volchkov VA Strashnov VI Tomson VV 《Neuroscience and behavioral physiology》2004,34(6):597-601
Morphofunctional and histoenzymological changes in spinal cord neurons of mongrel dogs were studied after epidural administration of isobaric 2% lidocaine solution. Control animals received epidural 0.9% sodium chloride. The results obtained from these studies provide evidence for the absence of pathological structural-metabolic changes in nerve tissue after treatment with lidocaine. The occurrence of certain morphofunctional rearrangements in spinal cord neurons were typical of animals of both the experimental and control groups. The changes recorded varied within the limits of physiological variation and provided evidence predominantly of the functional response of these nerve tissue structures to epidural injections of both sodium chloride and lidocaine. 相似文献
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家兔用改良Allen 氏系统造成不完全性脊髓损伤,随机分为对照组、损伤组和治疗组。分别测定血液和脊髓组织TXB 2、 6-keto-PGF 1 a 和ET-1 含量;以及脊髓组织灰质、白质和总血流量,研究紫外线照射和充氧自血回输疗法(UBIO)治疗脊髓损伤的作用机制。实验发现:损伤组血液和脊髓组织TXB 2 含量升高、6-keto-PGF 1 a 含量下降、ET-1 含量升高。脊髓组织灰质和白质血流量以及脊髓组织总血流量均下降。治疗组用UBIO 治疗后,血液和脊髓组织TXB 2 含量下降、6-keto-PGF 1 a 含量升高、ET-1 含量下降。脊髓组织灰质和白质血流量以及脊髓组织总血流量均上升。实验说明:UBIO 可以改善全身和脊髓组织的血液循环。 相似文献
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大鼠脊髓压迫损伤后COX-2基因和蛋白的表达 总被引:1,自引:1,他引:1
目的观察大鼠脊髓压迫损伤后COX-2mRNA和蛋白在脊髓组织内表达的时间特征,以及COX-2的空间分布特点。方法以压迫装置致脊髓损伤后,在伤后不同时间点(30min、3h、6h、24h、72h、1w)分别应用RT-PCR、Western blotting、免疫组化技术检测COX-2mRNA和蛋白表达和分布。结果RT-PCR和Western blotting显示,COX-2mRNA和蛋白伤后30min表达开始增加,于伤后6h达到峰值,伤后1w表达接近基础水平。免疫组化提示,COX-2蛋白在假手术组表达仅见于脊髓血管内皮细胞,伤后COX-2蛋白表达见于损伤区附近脊髓灰质内的神经元和血管内皮细胞,损伤中心部位COX-2免疫阳性细胞少见。结论脊髓压迫损伤早期可快速诱导COX-2基因的表达上调和蛋白的合成,伤后COX-2蛋白分布发生变化,主要位于脊髓神经元和血管内皮细胞。 相似文献
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TR Moshonkina AN Makarovski IN Bogacheva NA Scherbakova AA Savohin YP Gerasimenko 《Bulletin of experimental biology and medicine》2012,153(1):16-20
Until now, no scientific neurophysiologic methods of diagnostics and treatment of vertebrospinal pathologies were developed. Previous study showed that electrical stimulation of lumbar segments of the spinal cord in animals with complete spinal cord transection induced a well-coordinated weight-bearing locomotion. The present comparative study of motor activity triggered by electrical epidural stimulation of one or two segments of the spinal cord in spinal patients showed that stimulation of lumbar (L2-L4) or sacral (S2) segments facilitated generation of motor patterns of muscle activity. Combination of electrical stimulation with locomotor training resulted in the appearance of stepping patterns characteristic of normal walking and tonic activity of the muscles needed for body balance maintenance. 相似文献
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目的:从人胎脊髓提取液中寻找对脊髓GABA神经元有神经营养作用的成分。方法:用四月龄人胎制备脊髓提取液,加人体外培养的胎鼠脊髓细胞中,观察提取液对神经元活性、突起生长和分化的影响。结果:人胎脊髓中有提高GABA神经元活性的营养成分,并且小于10kD组分还可以诱导GABA神经元的分化,但是提取液对GABA神经元的突起生长没有影响。结论:实验结果揭示人胎脊髓中可能存在不止一种神经营养活性成分,对GABA神经元的活性和分化起营养作用。 相似文献
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丹参对脊髓损伤后伤区血流量及血液流变学指标的影响 总被引:2,自引:0,他引:2
目的 :比较应用丹参对兔脊髓损伤 (SCI)后伤区血流量及血液流变学指标的影响 ,探讨丹参对脊髓损伤的保护机制。方法 :5 8只成年日本大耳白兔 ,随机分成四组 ,A组 10只 ,作为正常组 ;B、C、D组各 16只 ,分别作对照组、地塞米松 (Dex)治疗组和丹参治疗组。比较脊髓损伤前后及应用Dex、丹参治疗后伤区血流量 (SCBF)及血液流变学指标的变化。结果 :脊髓损伤后 ,SCBF下降 ,血液粘度(ηb)、纤维蛋白原 (Fib)、细胞聚集指数 (RAI)增高。Dex对脊髓SCBF和血液流变学指标异常的改善不明显 ,而使用丹参治疗后 ,脊髓SCBF增高 ,血液流变学指标明显改善。结论 :丹参对脊髓损伤具有保护作用 ,且疗效较Dex明显 ,为临床治疗提供依据。 相似文献
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《Immunological investigations》2013,42(2):160-171
To investigate whether netrin-1 is involved in autoimmune injury of the central nervous system, the expression of netrin-1 protein was analyzed in the spinal cord of Lewis rats with experimental autoimmune encephalomyelitis (EAE). Western blot analysis revealed significantly increased content of netrin-1 in the spinal cords of rats at the peak stage of EAE, as compared with the levels in normal control animals (p < 0.01). Immunohistochemistry detected the netrin-1 protein in neurons, oligodendrocytes, astrocytes and vascular endothelial cells in the spinal cords of normal controls. In EAE-affected spinal cords, netrin-1 immunoreactivity was detected in infiltrating inflammatory cells at the peak stage as well as in neurons, oligodendrocytes and astrocytes. These results suggest that netrin-1 is transiently increased in rat EAE lesions, where it contributes to the modulation of rat acute EAE. 相似文献
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目的观察脑源性神经营养因子BDNF及其高亲合力受体TrkB在成年恒河猴胸髓的表达分布,为成年恒河猴脊髓BDNF、TrkB的功能研究提供形态学依据。方法灌注固定成年雄性恒河猴,取其胸段脊髓制作冰冻切片,用BDNF、TrkB特异性抗体行免疫组织化学SP法染色,观察BDNF、TrkB免疫阳性物质在胸段脊髓的分布。结果成年恒河猴胸髓内均可见BDNF、TrkB免疫反应阳性神经元,反应产物呈棕黄色颗粒。BDNF和TrkB免疫反应阳性细胞遍及胸髓灰质各板层,在腹角、侧角以及中央管邻近区域均可见阳性神经元,它们的阳性产物主要定位于神经元胞浆中,胞浆着色深,胞浆与胞核的界线清楚。BDNF免疫反应细胞的胞核未见染色,而不同的TrkB阳性细胞其胞核染色不一。结论成年恒河猴胸髓存在BDNF、TrkB的表达,其作用可能与猴脊髓的正常生理功能和损伤后的修复有关。 相似文献
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Zainab H. Afsari Waleed M. Renno E. Abd‐el‐basset 《Anatomical record (Hoboken, N.J. : 2007)》2008,291(4):390-399
Diabetes affects retinal and nervous glial cells, especially the astrocytes. A key indicator of this response is the alteration in the level of intermediate filament glial fibrillary acidic protein (GFAP) and number of GFAP‐immunoreactive astrocytes. To date, no study has investigated the effect of diabetes on the distribution of GFAP‐immunoreactive astrocytes in the spinal cord. Therefore, the present study investigated the effect of diabetes on the number of GFAP‐immunoreactive astrocytes in the gray matter of the spinal cord of streptozotocin‐induced diabetic Wistar rats. Animals were divided into six groups (n = 7); 6 weeks and 12 weeks diabetic duration groups and their respective age‐matched normal control and sham control groups. Our results demonstrated a significant (P < 0.001) decrease in the number of GFAP‐immunoreactive astrocytes in different areas of the spinal cord sections of the 6 weeks and 12 weeks long diabetic rats when compared with the spinal cord of normal and sham control groups of comparable age. The mean percentage in total number of GFAP‐immunoreactive astrocytes in the whole gray matter areas of the spinal cord of the 6 and 12 weeks diabetic groups were approximately 28% and 41% less than control groups. Furthermore, the 12 weeks diabetic group showed a significant (P < 0.001) reduction in the number of GFAP‐immunoreactive astrocytes when compared with the 6 weeks diabetic animals. These results suggest that the induction of diabetes is associated with a reduction in GFAP‐positive astrocytes in the spinal cord, which may affect the functional support and role of astrocytic cells in the nervous tissue. This in turn may contribute to the pathological changes associated with diabetic state in the central nervous system. Anat Rec, 291:390–399, 2008. © 2008 Wiley‐Liss, Inc. 相似文献
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M. N. Karpenko I. N. Abdurasulova V. M. Klimenko 《Neuroscience and behavioral physiology》2011,41(3):252-258
The Ca2+-dependent calpain system of intracellular proteases is involved in regulating a multitude of physiological body functions.
However, hyperactivation of calpains in cells is observed during the development of a number of responses, and this leads
to impairment to the functioning of vitally important physiological systems. We report here our use of a model of experimental
allergic encephalomyelitis (EAE) to demonstrate that cell homogenates from different parts of spinal cord show hyperactivation
of calpains and that calpain proteolytic activity increases with the severity of EAE; this occurred not only in the lower,
but also in the upper parts of the spinal cord. As CNS cells from animals with EAE showed increases in the levels of mRNA
for m- but not for μ-calpain, this hyperactivation would appear to be mediated more by m-calpain. The relationship between
the distribution of m-calpain hyperactivation in different parts of the spinal cord with the severity of EAE is consistent
with data on the volume of neurological destruction of the CNS, suggesting that m-calpain is involved in the processes initiating
neuron and cell death during the development of this disease. 相似文献