scholarly journals Impaired Organization of Paired-Pulse TMS-Induced I-Waves After Human Spinal Cord Injury

2015 ◽  
Vol 26 (5) ◽  
pp. 2167-2177 ◽  
Author(s):  
John Cirillo ◽  
Finnegan J. Calabro ◽  
Monica A. Perez
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Paired Pulse ◽  
Human Spinal Cord ◽  
Cord Injury

The effects of methylprednisolone and the ganglioside GM1 on acute spinal cord injury in rats

1994 ◽  
Vol 80 (1) ◽  
pp. 97-111 ◽  
Author(s):  
Shlomo Constantini ◽  
Wise Young
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Body Weight Loss ◽  
Ganglioside Gm1 ◽  
Rat Spinal Cord ◽  
Neuroprotective Effects ◽  
Content Type ◽  
Human Spinal Cord ◽  
Cord Injury ◽  
Fine Print

✓ Recent clinical trials have reported that methylprednisolone sodium succinate (MP) or the monosialic ganglioside GM1 improves neurological recovery in human spinal cord injury. Because GM1 may have additive or synergistic effects when used with MP, the authors compared MP, GM1, and MP+GM1 treatments in a graded rat spinal cord contusion model. Spinal cord injury was caused by dropping a rod weighing 10 gm from a height of 1.25, 2.5, or 5.0 cm onto the rat spinal cord at T-10, which had been exposed via laminectomy. The lesion volumes were quantified from spinal cord Na and K shifts at 24 hours after injury and the results were verified histologically in separate experiments. A single dose of MP (30 mg/kg), given 5 minutes after injury, reduced 24-hour spinal cord lesion volumes by 56% (p = 0.0052), 28% (p = 0.0065), and 13% (p > 0.05) in the three injury-severity groups, respectively, compared to similarly injured control groups treated with vehicle only. Methylprednisolone also prevented injury-induced hyponatremia and increased body weight loss in the spine-injured rats. When used alone, GM1 (10 to 30 mg/kg) had little or no effect on any measured variable compared to vehicle controls; when given concomitantly with MP, GM1 blocked the neuroprotective effects of MP. At a dose of 3 mg/kg, GM1 partially prevented MP-induced reductions in lesion volumes, while 10 to 30 mg/kg of GM1 completely blocked these effects of MP. The effects of MP on injury-induced hyponatremia and body weight loss were also blocked by GM1. Thus, GM1 antagonized both central and peripheral effects of MP in spine-injured rats. Until this interaction is clarified, the authors recommend that MP and GM1 not be used concomitantly to treat acute human spinal cord injury. Because GM1 modulates protein kinase activity, protein kinases inhibit lipocortins, and lipocortins mediate anti-inflammatory effects of glucocorticoids, it is proposed that the neuroprotective effects of MP are partially due to anti-inflammatory effects and that GM1 antagonizes the effects of MP by inhibiting lipocortin. Possible beneficial effects of GM1 reported in central nervous system injury may be related to the effects on neural recovery rather than acute injury processes.

scholarly journals Safety and Feasibility of Autologous Olfactory Ensheathing Cell and Bone Marrow Mesenchymal Stem Cell Co-transplantation in Chronic Human Spinal Cord Injury: A Clinical Trial

2021 ◽  
Author(s):  
Homa Zamani ◽  
Mina Soufizomorrod ◽  
Saeed Oraee-Yazdani ◽  
Dariush Naviafar ◽  
Mohammadhosein Akhlaghpasand ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Bone Marrow ◽  
Spinal Cord Injury ◽  
Stem Cell ◽  
Mesenchymal Stem Cell ◽  
Safety Issue ◽  
Functional Evaluation ◽  
Olfactory Ensheathing Cell ◽  
Human Spinal Cord ◽  
Cord Injury

Abstract Cell-based therapies are considered as promising strategies for spinal cord regeneration. However, a combinatorial cell therapeutic approach seems more beneficial as it can target various aspects of the injury. Here, we assessed the safety and feasibility of autologous mucosal Olfactory Ensheathing Cell (OEC) and bone marrow Mesenchymal Stem Cell (MSC) co-transplantation in patients with chronic, complete (American Spinal Injury Association (ASIA) classification A) Spinal Cord Injury (SCI). Three patients with the traumatic SCI of the thoracic level were enrolled. They received autologous OEC and MSC combination through the lumbar puncture. All adverse events and possible functional outcomes were documented performing pre- and post-operative general clinical examination, Magnetic Resonance Imaging (MRI), neurological assessment based on the International Standard of Neurological Classification for SCI (ISNCSCI), and functional evaluation using Spinal Cord Independence Measure version III (SCIM III). No serious safety issue was recorded during the two years of follow-up. MRI findings remained unchanged with no neoplastic tissue formation. ASIA impairment scale improved from A to B in one of the participants. SCIM III evaluation also showed some degrees of progress in this patient's quality of life. The two other patients had negligible or no improvement in their sensory scores without any changes in the ASIA impairment scale and SCIM III scores. No motor recovery was observed in any of the participants. Overall, this two-year trial was not associated with any adverse findings, which may suggest the safety of autologous OEC and bone marrow MSC combination for the treatment of human SCI.This study was registered at the Iranian Registry of Clinical Trials (IRCT registration number: IRCT20160110025930N2/ registration date: 2018-09-29).

scholarly journals Motoneuron Death after Human Spinal Cord Injury

2017 ◽  
Vol 34 (3) ◽  
pp. 581-590 ◽  
Author(s):  
Robert M. Grumbles ◽  
Christine K. Thomas
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Human Spinal Cord ◽  
Cord Injury

Experimental spinal cord trauma: a review of mechanically induced spinal cord injury in rat models

2017 ◽  
Vol 28 (1) ◽  
pp. 15-20 ◽  
Author(s):  
Dauda Abdullahi ◽  
Azlina Ahmad Annuar ◽  
Masro Mohamad ◽  
Izzuddin Aziz ◽  
Junedah Sanusi
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Cord Compression ◽  
Acute Injury ◽  
Optimal Timing ◽  
Spinal Cord Trauma ◽  
Rat Models ◽  
Human Spinal Cord ◽  
Cord Injury ◽  
Transient Force

AbstractIt has been shown that animal spinal cord compression (using methods such as clips, balloons, spinal cord strapping, or calibrated forceps) mimics the persistent spinal canal occlusion that is common in human spinal cord injury (SCI). These methods can be used to investigate the effects of compression or to know the optimal timing of decompression (as duration of compression can affect the outcome of pathology) in acute SCI. Compression models involve prolonged cord compression and are distinct from contusion models, which apply only transient force to inflict an acute injury to the spinal cord. While the use of forceps to compress the spinal cord is a common choice due to it being inexpensive, it has not been critically assessed against the other methods to determine whether it is the best method to use. To date, there is no available review specifically focused on the current compression methods of inducing SCI in rats; thus, we performed a systematic and comprehensive publication search to identify studies on experimental spinalization in rat models, and this review discusses the advantages and limitations of each method.

196. Inflammatory Cytokine Expression and the Development of Injury Severity Biomarkers After Human Spinal Cord Injury

2008 ◽  
Vol 8 (5) ◽  
pp. 98S-99S ◽  
Author(s):  
Anthea Stammers ◽  
Lise Belanger ◽  
Donna Chan ◽  
Arlene Bernardo ◽  
Hamed Umedaly ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Inflammatory Cytokine ◽  
Injury Severity ◽  
Cytokine Expression ◽  
Human Spinal Cord ◽  
Cord Injury

Flexion reflex modulation during stepping in human spinal cord injury

2009 ◽  
Vol 196 (3) ◽  
pp. 341-351 ◽  
Author(s):  
Maria Knikou ◽  
Claudia A. Angeli ◽  
Christie K. Ferreira ◽  
Susan J. Harkema
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Reflex Modulation ◽  
Human Spinal Cord ◽  
Flexion Reflex ◽  
Cord Injury

Absence of Local Sign Withdrawal in Chronic Human Spinal Cord Injury

2003 ◽  
Vol 90 (5) ◽  
pp. 3232-3241 ◽  
Author(s):  
Brian D. Schmit ◽  
T. George Hornby ◽  
Vicki M. Tysseling-Mattiace ◽  
Ela N. Benz
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Stimulus Location ◽  
Joint Torque ◽  
Test Sequence ◽  
Modular Organization ◽  
Human Spinal Cord ◽  
Local Sign ◽  
Cord Injury ◽  
Hip Flexion

Local sign withdrawal, a reflex to direct the limb away from noxious cutaneous stimuli, is thought to be indicative of a modular organization of the spinal cord. To assess the integrity of such an organization of the spinal cord in chronic human spinal cord injury (SCI), we tested the electromyogram (EMG) and joint torque responses to cutaneous stimuli applied to 6 locations of the leg in 10 SCI volunteers and 3 spinal-intact controls. The 6 locations included the medial arch of the foot, the second metatarsal, the dorsum, the region over the sural nerve at the lateral malleolus, and the anterior and posterior aspects of the lower leg. Although spinal-intact subjects demonstrated local sign withdrawal, the data from SCI subjects indicated that an invariant flexion response pattern was produced regardless of stimulus location. Ankle dorsiflexion and hip flexion were produced in all subjects at all locations and no difference in the ratio of hip:ankle torques could be detected for the 6 test locations. A windup-crossover test, employing a sequence of 6 stimuli at 1-s intervals was used to assess whether common neuronal pathways were responsible for the loss of modular organization. An additional 10 SCI volunteers were tested using stimuli in which the stimulus location was switched between the 2nd and 3rd stimulus of the test sequence. The response to the crossover stimulus more closely resembled the response to the 3rd stimulus of a windup sequence than a response without conditioning stimuli. These results indicate that increased excitability produced by windup at one stimulus site is maintained at the 2nd site. This observation suggests that deep dorsal horn neurons, typically associated with musculotopic mapping, may be reorganized in chronic spinal cord injury.

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