scholarly journals Morphological changes in the sciatic nerve in experimental modeling of contusion injury of the spinal cord in rats

2021 ◽  
Vol 18 (3) ◽  
pp. 36-42
Author(s):  
N. V. Kubrak ◽  
T. N. Varsegova ◽  
S. O. Ryabykh
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Sciatic Nerve ◽  
Peripheral Nerve ◽  
Morphological Changes ◽  
Female Rats ◽  
Nerve Tissue ◽  
Motor Deficit ◽  
Cord Injury ◽  
Contusion Injury

Objective. To analyze morphological and morphometric changes in the sciatic nerve of rats after the spinal cord injury.Material and Methods. The Т9 moderately severe contusion injury of the spinal cord was simulated in 12 Wistar female rats. Functions of the pelvic limbs were assessed according to the standardized BBB scale. The animals were withdrawn from the experiment after nine and 13 weeks. Epoxy semi-thin (1 µm) sections were used to study sciatic nerve at the light-optical level.Results. Significant recovery of pelvic limb functions was observed within four weeks after surgery, the plateau was achieved by Week 5 (9.5 ± 0.28 points according to the BBB scale), the deterioration in the motor activity was observed by Week 9 (8.67 ± 0.33), its recovery was achieved by Week 13 of the experiment (9.5 ± 0.87). After 9 and 13 weeks, reactive-destructive changes were detected in the sciatic nerve in 9 % and 8 % of nerve conductors, an increase in the number density of myelin fibers by 28 % and 27 % (p < 0.05) and myelin-free fibers by 20 % and 49 % (p < 0.05), and a decrease in axon diameters by 8 % and 10 % (p < 0.05), respectively.Conclusions. The morphological and morphometric changes in the sciatic nerve revealed after the spinal cord injury in the form of destruction of a part of the fibers, axonal atrophy and a decrease in the proportion of large fibers negatively affect its conductive properties. The leveling of peripheral nerve damage, possibly, will accelerate the regression of the motor deficit caused by the spinal cord injury; therefore, it is necessary to develop a set of preventive measures aimed at preventing the reorganization of the peripheral nerve tissue.

Contrasting genetic effects of major histocompatibility complex on ischemic peripheral nerve and spinal cord injury in female rats

2008 ◽  
Vol 443 (2) ◽  
pp. 95-98 ◽  
Author(s):  
Cecilia A. Dominguez ◽  
Olle Lidman ◽  
Tomas Olsson ◽  
Zsuzsanna Wiesenfeld-Hallin ◽  
Fedrik Piehl ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Major Histocompatibility Complex ◽  
Peripheral Nerve ◽  
Genetic Effects ◽  
Female Rats ◽  
Major Histocompatibility ◽  
Histocompatibility Complex ◽  
Cord Injury

Transplantation Strategies for Spinal Cord Injury Based on Microenvironment Modulation

2020 ◽  
Vol 15 (6) ◽  
pp. 522-530
Author(s):  
Jiawei Shu ◽  
Feng Cheng ◽  
Zhe Gong ◽  
Liwei Ying ◽  
Chenggui Wang ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Peripheral Nerve ◽  
Nerve Injury ◽  
Autonomic Dysfunction ◽  
Peripheral Nerve Injury ◽  
Therapeutic Effects ◽  
Permanent Damage ◽  
Cord Injury ◽  
Severe Motor

Spinal cord injury (SCI) is different from peripheral nerve injury; it results in devastating and permanent damage to the spine, leading to severe motor, sensory and autonomic dysfunction. SCI produces a complex microenvironment that can result in hemorrhage, inflammation and scar formation. Not only does it significantly limit regeneration, but it also challenges a multitude of transplantation strategies. In order to promote regeneration, researchers have recently begun to focus their attention on strategies that manipulate the complicated microenvironment produced by SCI. And some have achieved great therapeutic effects. Hence, reconstructing an appropriate microenvironment after transplantation could be a potential therapeutic solution for SCI. In this review, first, we aim to summarize the influential compositions of the microenvironment and their different effects on regeneration. Second, we highlight recent research that used various transplantation strategies to modulate different microenvironments produced by SCI in order to improve regeneration. Finally, we discuss future transplantation strategies regarding SCI.

scholarly journals Statin use is associated with reduced motor recovery after spinal cord injury

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Erin M. Triplet ◽  
Isobel A. Scarisbrick
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Motor Recovery ◽  
Motor Deficit ◽  
Historical Cohort ◽  
Cholesterol Lowering ◽  
Severity Of Injury ◽  
Cord Injury ◽  
The Impact ◽  
Statin Use

Abstract Study design We completed retrospective analysis of statin use in individuals with neurologically significant spinal cord injury in a historical cohort study. Objective Our objective was to establish the prevalence of cholesterol-lowering agent use following spinal cord injury (SCI) and to determine the impact on recovery of motor function. Setting Patients enrolled in the Rochester Epidemiology Project in Olmsted County, Minnesota, USA from 2005 to 2018 were included in analysis. Methods Exclusion criteria: age <18, comorbid neurological disease, prior neurological deficit, nontraumatic injury, survival <1 year, or lack of motor deficit. Demographics and cholesterol-lowering agent use in 83 individuals meeting all criteria were recorded. A total of 68/83 individuals were then assessed for change in function over the first 2 months after injury using the ISNCSCI motor subscore. Statistical comparison between control and statin groups was done by two-sided Chi-squared test or two-tailed Student’s t test. Generalized regression was performed to assess associations between independent variables and functional outcome. Results 30% of individuals with SCI had a prescription for a cholesterol-lowering agent. No significant differences were observed in severity of injury or demographic composition between groups. The change in motor subscore was reduced in the statin group compared to controls (p = 0.03, Mann–Whitney). Both severity of injury and statin were significant predictors of reduced motor recovery (p = 0.001, and p = 0.04, respectively). Conclusions Both severity of SCI and statins were significant predictors of reduced motor recovery. Additional investigation is needed to address potential impact of statin-therapy in the context of CNS injury and repair.

scholarly journals Histopathological Changes in Surrounding Tissue of the Sciatic Nerve after Spinal Cord Injury in Rats

2012 ◽  
Vol 24 (9) ◽  
pp. 817-820
Author(s):  
Ippei Kitade ◽  
Masahiro Hoso ◽  
Taro Matsuzaki ◽  
Shinya Yoshida ◽  
Akio Kamijyo ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Sciatic Nerve ◽  
Surrounding Tissue ◽  
Histopathological Changes ◽  
Cord Injury

Slope analysis of somatosensory evoked potentials in spinal cord injury for detecting contusion injury and focal demyelination

2010 ◽  
Vol 17 (9) ◽  
pp. 1159-1164 ◽  
Author(s):  
Gracee Agrawal ◽  
David Sherman ◽  
Anil Maybhate ◽  
Michael Gorelik ◽  
Douglas A. Kerr ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Evoked Potentials ◽  
Somatosensory Evoked Potentials ◽  
Slope Analysis ◽  
Cord Injury ◽  
Contusion Injury ◽  
Focal Demyelination

scholarly journals Percutaneous peripheral nerve stimulation for treatment of shoulder pain after spinal cord injury: A case report

2017 ◽  
Vol 41 (1) ◽  
pp. 119-124 ◽  
Author(s):  
Daniela Mehech ◽  
Melvin Mejia ◽  
Gregory A. Nemunaitis ◽  
John Chae ◽  
Richard D. Wilson
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Case Report ◽  
Peripheral Nerve ◽  
Shoulder Pain ◽  
Nerve Stimulation ◽  
Peripheral Nerve Stimulation ◽  
Cord Injury

Ultrastructural scoring of graded acute spinal cord injury in the rat

2002 ◽  
Vol 97 (1) ◽  
pp. 49-56 ◽  
Author(s):  
Erkan Kaptanoglu ◽  
Selcuk Palaoglu ◽  
H. Selcuk Surucu ◽  
Mutlu Hayran ◽  
Etem Beskonakli
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Behavioral Assessment ◽  
Traumatic Injury ◽  
Significant Negative Correlation ◽  
Content Type ◽  
Cord Injury ◽  
Contusion Injury ◽  
Weight Drop ◽  
Fine Print

Object. There is a need for an accurate quantitative histological technique that also provides information on neurons, axons, vascular endothelium, and subcellular organelles after spinal cord injury (SCI). In this paper the authors describe an objective, quantifiable technique for determining the severity of SCI. The usefulness of ultrastructural scoring of acute SCI was assessed in a rat model of contusion injury. Methods. Spinal cords underwent acute contusion injury by using varying weights to produce graded SCI. Adult Wistar rats were divided into five groups. In the first group control animals underwent laminectomy only, after which nontraumatized spinal cord samples were obtained 8 hours postsurgery. The weight-drop technique was used to produce 10-, 25-, 50-, and 100-g/cm injuries. Spinal cord samples were also obtained in the different trauma groups 8 hours after injury. Behavioral assessment and ultrastructural evaluation were performed in all groups. When the intensity of the traumatic injury was increased, behavioral responses showed a decreasing trend. A similar significant negative correlation was observed between trauma-related intensity and ultrastructural scores. Conclusions. In the present study the authors characterize quantitative ultrastructural scoring of SCI in the acute, early postinjury period. Analysis of these results suggests that this method is useful in evaluating the degree of trauma and the effectiveness of pharmacotherapy in neuroprotection studies.

Sign in / Sign up

Export Citation Format

Share Document