scholarly journals Up-regulation of MicroRNAs-21 and -223 in a Sprague-Dawley Rat Model of Traumatic Spinal Cord Injury

2020 ◽  
Vol 10 (3) ◽  
pp. 141
Author(s):  
Hyo-Jin Chung ◽  
Wook-Hun Chung ◽  
Sun-Hee Do ◽  
Jae-Hoon Lee ◽  
Hwi-yool Kim
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Rat Model ◽  
Rating Scale ◽  
Quantitative Polymerase Chain Reaction ◽  
Balloon Catheter ◽  
Traumatic Spinal Cord Injury ◽  
Sprague Dawley ◽  
Time Points ◽  
Cord Injury

In this experimental animal study, we examined alterations in the degree of transcription of two microRNAs (miRs)—miR-21 and -223—in a Sprague-Dawley (SD) rat model of traumatic spinal cord injury (TSCI). Depending on the volume of the balloon catheter (V), a total of 75 male SD rats were divided into the three experimental groups: the sham group (n = 25; V = 0 μL), the mild group (n = 25; V = 20 μL), and the severe group (n = 25; V = 50 μL). Successful induction of TSCI was confirmed on both locomotor rating scale at 4 h and 1, 3 and 7 days post-lesion and histopathologic examinations. Then, RNA isolation and quantitative polymerase chain reaction (PCR) were performed. No differences in the level of miR-21 expression were found at the first time point studied (4 h post-lesion) between the three experimental groups, whereas such differences were significant at all the other time points (p < 0.05). Moreover, there were significant alterations in the level of miR-223 expression at all time points studied through all the experimental groups (p < 0.05). Furthermore, locomotor rating scale scores had a linear relationship with the level of miR-21 expression (R2 = 0.4363, Y = 1.661X + 3.096) and that of miR-223 one (R2 = 0.9104, Y = 0.8385X + 2.328). Taken together, we conclude that up-regulation of miR-21 and -223 might be closely associated with progression and the early course of TSCI, respectively.

Activation of SIRT1 by Hyperbaric  Oxygenation Promotes Recovery of Motor Dysfunction in Spinal Cord Injury Rats

2020 ◽  
Author(s):  
Huiqiang Chen ◽  
Mengyu Yao ◽  
Zhibo Li ◽  
Ranran Xing ◽  
Cheng Zhang ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Molecular Mechanisms ◽  
Hyperbaric Oxygenation ◽  
Rating Scale ◽  
Motor Dysfunction ◽  
Sprague Dawley ◽  
Inflammatory Cascade ◽  
Locomotor Function ◽  
Cord Injury

Abstract Background: Emerging evidence demonstrated that hyperbaric oxygenation (HBO) therapy improved the locomotor dysfunction following spinal cord injury (SCI). Sirtuin1(SIRT1) has been characterized as neuroprotection in nerve system. However, whether SIRT1 is involved in alleviation of locomotor function by HBO therapy is unclear. Methods: The Basso, Beattie Bresnahan (BBB) locomotor rating scale was used to evaluate the open-field locomotor function. Western blot, real-time quantitative reverse transcription polymerase chain reaction, SIRT1 activity assay and enzyme-linked immunosorbent assays were performed to explore the molecular mechanisms in adult Sprague-Dawley rats. Results: We found that series HBO therapy significantly improved the locomotor dysfunction and ameliorated the decrease mRNA, protein and activity of spinal cord SIRT1 induced by traumatic SCI injury in rats. In addition, intraperitoneal injection SIRT1 antagonist EX-527 abolished the beneficial effects of series HBO treatment on locomotor deficits and SIRT1 activity loss caused by traumatic SCI injury. However, the rats undergone both series HBO therapy and SIRT1 agonist SRT1720 got the higher BBB score than that undergone series HBO treatment only. Importantly, series HBO treatment following the traumatic SCI injury inhibited the inflammatory cascade and apoptosis-related protein, which was retained by EX-527 and enhanced by SRT1720. Furthermore, EX-527 blocked the enhanced induction of autophagy series with HBO application. Conclusion: These findings demonstrated a new mechanism for series HBO therapy involving activation of SIRT1 and subsequent modulation of inflammatory cascade, apoptosis and autophagy, which contributed to the recovery of motor dysfunction. Key words: HBO, SIRT1, motor dysfunction, inflammation, autophagy, apoptosis

scholarly journals Exendin-4 Plays a Protective Role in a Rat Model of Spinal Cord Injury Through SERCA2

2018 ◽  
Vol 47 (2) ◽  
pp. 617-629 ◽  
Author(s):  
Zhonglei Sun ◽  
Yingfu Liu ◽  
Xianbin Kong ◽  
Renjie Wang ◽  
Yunqiang Xu ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Rat Model ◽  
Rating Scale ◽  
Protective Role ◽  
Female Rats ◽  
Spinal Cord Tissue ◽  
Cord Injury ◽  
Glucagon Like Peptide 1 ◽  
Long Acting

Background/Aims: Current therapies for spinal cord injury (SCI) have limited efficacy, and identifying a therapeutic target is a pressing need. Sarcoplasmic/endoplasmic reticulum Ca2+ ATPase 2 (SERCA2) plays an important role in regulating calcium homeostasis, which has been shown to inhibit apoptosis. Exendin-4 has been shown to inhibit the apoptosis of nerve cells in SCI, which can also improve SERCA2 expression. In this study, we sought to determine whether exendin-4 plays a protective role in a rat model of SCI via SERCA2. Methods: To investigate the effects of exendin-4 on SCI, a rat model of SCI was induced by a modified version of Allen’s method. Spinal cord tissue sections from rats and western blot analysis were used to examine SERCA2 expression after treatment with the long-acting glucagon-like peptide 1 receptor exendin-4 or the SERCA2 antagonist 5(6)-carboxyfluorescein diacetate N-succinimidyl ester (CE). Locomotor function was evaluated using the Basso Beattie Bresnahan locomotor rating scale and slanting board test. Results: Cell apoptosis was increased with CE treatment and decreased with exendin-4 treatment. Upregulation of SERCA2 in female rats with SCI resulted in an improvement of motor function scores and histological changes. Conclusion: These findings suggest that exendin-4 plays a protective role in a rat model of SCI through SERCA2 via inhibition of apoptosis. Existing drugs targeting SERCA2 may be an effective therapeutic strategy for the treatment of SCI.

scholarly journals Level of Exercise Participation in Individuals with Traumatic Spinal Cord Injury During Inpatient Rehabilitation: A Cross-sectional Study

2021 ◽  
Vol 19 (1) ◽  
pp. 32-38
Author(s):  
Shambhu Prasad Adhikari ◽  
Shraddha Adhikari ◽  
Chanda Rana ◽  
Rubee Dev
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Rating Scale ◽  
Inpatient Rehabilitation ◽  
Cross Sectional Study ◽  
Traumatic Spinal Cord Injury ◽  
Cross Sectional ◽  
Significant Group ◽  
Exercise Participation ◽  
Cord Injury

Background: The outcome of exercises depends on participants’ level of exercise participation. We aimed to investigate the level of exercise participation in individuals with traumatic spinal cord injury during inpatient rehabilitation.Methods: All participants with traumatic spinal cord injury undergoing inpatient physiotherapy at a rehabilitation center were recruited. Participants with hearing/visual problems were excluded. Hopkins Rehabilitation Engagement Rating Scale and Pittsburgh Rehabilitation Participation Scale were used to evaluate exercise participation levels. One-way ANOVA and unpaired t-test were used to compare level of participation between groups. Pearson’s correlation and Chi-square tests were used to evaluate correlation and association. Results: Thirty-five participants with mean age 37.1 ± 11.7 years completed the study. Hopkins Rehabilitation Engagement Rating Scale and Pittsburgh Rehabilitation Participation Scale demonstrated a low level of exercise participation in 31.4 % and 42.9 % participants respectively. Participants with an incomplete injury had high exercise participation levels compared to complete injuries. There were significant group differences (p < 0.001, effect size = 0.8) between complete and incomplete injuries and among various levels of injuries. The level of exercise participation was significantly associated with injury levels and type (p < 0.001, Phi = 0.7 to 0.9). Conclusions: The exercise participation level was high for incomplete compared to complete injuries in Nepalese individuals with traumatic spinal cord injury. The demographic and socio-economical factors were not associated with level of exercise participation.Keywords: Exercise participation; rehabilitation; spinal cord injury

scholarly journals Euxanthone inhibits traumatic spinal cord injury via anti-oxidative stress and suppression of p38 and PI3K/Akt signaling pathway in a rat model

2021 ◽  
Vol 12 (1) ◽  
pp. 114-126
Author(s):  
Rubin Yao ◽  
Lirong Ren ◽  
Shiyong Wang ◽  
Ming Zhang ◽  
Kaishun Yang
Keyword(s):  
Oxidative Stress ◽  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Water Content ◽  
Incline Plane ◽  
Akt Signaling ◽  
Traumatic Spinal Cord Injury ◽  
Sprague Dawley ◽  
Stress Markers ◽  
Cord Injury

Abstract Background Owing to neurite promoting, antioxidant and anti-inflammatory effects of Euxanthone (Eux), the investigation was aimed to probe the neuroprotective efficacy of Eux against traumatic spinal cord injury (t-SCI) in rats and whether Eux can improve neuropathic function in t-SCI. Method Sprague-Dawley (SD) rats were randomized in – Sham, t-SCI, Eux30, and Eux60 (t-SCI + 30 and 60 mg/kg respectively). Animals with compression force-induced t-SCI were subjected to estimation of locomotor functions. Spinal cord water content and Evans blue (EB) effusion were determined for quantifying edema and intactness of the spinal cord. Oxidative stress and immunochemical markers were quantified by ELISA and western blotting. Results Findings revealed that Eux60 group animals had greater Basso, Beattie, and Bresnahan (BBB) and (incline plane test) IPT score indicating improved locomotor functions. There was a reduction in the spinal edema and water content after Eux treatment, together with lowering of oxidative stress markers. The expression of IL-6, IL-12, IL-1β, caspase-3, RANKL, TLR4, NF-κB, p-38, PI3K, and Akt in spinal cord tissues of t-SCI-induced rats was lowered after Eux treatment. Conclusion Overall, the investigation advocates that Eux attenuates t-SCI and associated inflammation, oxidative damage, and resulting apoptosis via modulation of TLR4/NF-κB/p38 and PI3K/Akt signaling cascade.

scholarly journals Elevated leptin expression in rat model of traumatic spinal cord injury and femoral fracture

2011 ◽  
Vol 34 (5) ◽  
pp. 501-509 ◽  
Author(s):  
Lei Wang ◽  
Xingguo Tang ◽  
Hongxi Zhang ◽  
Jishan Yuan ◽  
Hua Ding ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Rat Model ◽  
Femoral Fracture ◽  
Traumatic Spinal Cord Injury ◽  
Cord Injury ◽  
Leptin Expression
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