scholarly journals The Roles of Superoxide on At-Level Spinal Cord Injury Pain in Rats

2021 ◽  
Vol 22 (5) ◽  
pp. 2672
Author(s):  
Bong Hyo Lee ◽  
Jonghoon Kang ◽  
Hee Young Kim ◽  
Young S. Gwak
Keyword(s):  
Neuropathic Pain ◽  
The Body ◽  
Neuronal Firing ◽  
Sprague Dawley ◽  
Mechanical Sensitivity ◽  
Nociceptive Transmission ◽  
Firing Rates ◽  
Naive Group ◽  
Sprague Dawley Rats ◽  
Cord Injury

Background: In the present study, we examined superoxide-mediated excitatory nociceptive transmission on at-level neuropathic pain following spinal thoracic 10 contusion injury (SCI) in male Sprague Dawley rats. Methods: Mechanical sensitivity at body trunk, neuronal firing activity, and expression of superoxide marker/ionotropic glutamate receptors (iGluRs)/CamKII were measured in the T7/8 dorsal horn, respectively. Results: Topical treatment of superoxide donor t-BOOH (0.4 mg/kg) increased neuronal firing rates and pCamKII expression in the naïve group, whereas superoxide scavenger Tempol (1 mg/kg) and non-specific ROS scavenger PBN (3 mg/kg) decreased firing rates in the SCI group (* p < 0.05). SCI showed increases of iGluRs-mediated neuronal firing rates and pCamKII expression (* p < 0.05); however, t-BOOH treatment did not show significant changes in the naïve group. The mechanical sensitivity at the body trunk in the SCI group (6.2 ± 0.5) was attenuated by CamKII inhibitor KN-93 (50 μg, 3.9 ± 0.4) or Tempol (1 mg, 4 ± 0.4) treatment (* p < 0.05). In addition, the level of superoxide marker Dhet showed significant increase in SCI rats compared to the sham group (11.7 ± 1.7 vs. 6.6 ± 1.5, * p < 0.05). Conclusions: Superoxide and the pCamKII pathway contribute to chronic at-level neuropathic pain without involvement of iGluRs following SCI.

scholarly journals Potential use of molecular and structural characterization of the gut bacterial community for postmortem interval estimation in Sprague Dawley rats

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Huan Li ◽  
Siruo Zhang ◽  
Ruina Liu ◽  
Lu Yuan ◽  
Di Wu ◽  
...  
Keyword(s):  
High Throughput Sequencing ◽  
Interval Estimation ◽  
The Body ◽  
Taxon Richness ◽  
Time Since Death ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
Level Data ◽  
Species Taxon

AbstractOnce the body dies, the indigenous microbes of the host begin to break down the body from the inside and play a key role thereafter. This study aimed to investigate the probable shift in the composition of the rectal microbiota at different time intervals up to 15 days after death and to explore bacterial taxa important for estimating the time since death. At the phylum level, Proteobacteria and Firmicutes showed major shifts when checked at 11 different intervals and emerged at most of the postmortem intervals. At the species level, Enterococcus faecalis and Proteus mirabilis showed a downward and upward trend, respectively, after day 5 postmortem. The phylum-, family-, genus-, and species-taxon richness decreased initially and then increased considerably. The turning point occurred on day 9, when the genus, rather than the phylum, family, or species, provided the most information for estimating the time since death. We constructed a prediction model using genus-level data from high-throughput sequencing, and seven bacterial taxa, namely, Enterococcus, Proteus, Lactobacillus, unidentified Clostridiales, Vagococcus, unidentified Corynebacteriaceae, and unidentified Enterobacteriaceae, were included in this model. The abovementioned bacteria showed potential for estimating the shortest time since death.

Effect of fluoride on the proteomic profile of the hippocampus in rats

2015 ◽  
Vol 70 (5-6) ◽  
pp. 151-157 ◽  
Author(s):  
Ye Pan ◽  
Peng Lü ◽  
Lijing Yin ◽  
Keping Chen ◽  
Yuanqing He
Keyword(s):  
Body Weight ◽  
Spectroscopic Analysis ◽  
Physiological Saline ◽  
Treated Group ◽  
The Body ◽  
Learning Ability ◽  
Sprague Dawley ◽  
Acid Biosynthesis ◽  
Two Dimensional Gel Electrophoresis ◽  
Sprague Dawley Rats

Abstract Two-dimensional gel electrophoresis (2-DE) was used to detect fluoride-induced alterations in the proteome of the rat hippocampus. Male Sprague-Dawley rats (n=30) were subjected to treatments three weeks after weaning. Animals of the first group were injected intraperitoneally (i.p.) with aqueous NaF (20 mg/kg/body weight/day), the second group, injected with physiological saline, served as the control. After 30 days, the body weight of the fluoride-treated rats was lower than that of the control, and F– levels in serum were higher than in the control. The hippocampus was subjected to proteomic analysis, and the fluoride-treated group was found to contain 19 up-regulated and eight down-regulated proteins. The proteins, identified by mass-spectroscopic analysis of their fragments obtained after digestion, were found to be involved in amino acid biosynthesis, the insulin signaling pathway and various other crucial functions. Our results also provide useful information on the mechanism of the reduction of the learning ability and memory induced by F.

scholarly journals Olfactory bulb transplantation in complete spinal cord injury: axonal regeneration and locomotor recovery

2015 ◽  
Vol 14 (1) ◽  
pp. 50-52
Author(s):  
Carlos Abraham Arellanes-Chávez ◽  
Ariana Martínez Bojórquez ◽  
Ernesto Ramos Martínez
Keyword(s):  
Spinal Cord ◽  
Axonal Regeneration ◽  
Sufficient Evidence ◽  
Spinal Cord Regeneration ◽  
Sprague Dawley ◽  
Locomotor Recovery ◽  
Randomized Controlled ◽  
Sprague Dawley Rats ◽  
Cord Injury ◽  
Complete Spinal Cord Injury

OBJECTIVES: To determine whether the intervention in rats is effective in terms of spinal cord regeneration and locomotor recovery, in order to obtain sufficient evidence to apply the therapy in humans. METHODS: a randomized, controlled, experimental, prospective, randomized trial was conducted, with a sample of 15 adult female Sprague-Dawley rats weighing 250 gr. They were divided into three equal groups, and trained for 2 weeks based on Pavlov's classical conditioning method, to strengthen the muscles of the 4 legs, stimulate the rats mentally, and keep them healthy for the surgery. RESULTS: It was observed that implantation of these cells into the site of injury may be beneficial to the process of spinal cord regeneration after spinal trauma, to mediate secretion of neurotrophic and neuroprotective chemokines, and that the OECs have the ability to bridge the repair site and decrease the formation of gliosis, creating a favorable environment for axonal regeneration. CONCLUSION: It is emphasized that the olfactory ensheathing glial cells possess unique regenerative properties; however, it was not until recently that the activity of promoting central nervous system regeneration was recognized.

Intrathecal eugenol administration alleviates neuropathic pain in male Sprague-Dawley rats

2010 ◽  
Vol 24 (11) ◽  
pp. 1645-1653 ◽  
Author(s):  
Ludivine Lionnet ◽  
Francis Beaudry ◽  
Pascal Vachon
Keyword(s):  
Neuropathic Pain ◽  
Sprague Dawley ◽  
Sprague Dawley Rats

Influence of Several Chelating Agents on the Distribution and Binding of Cadmium in Rats

1987 ◽  
Vol 6 (6) ◽  
pp. 451-458 ◽  
Author(s):  
W. Rau ◽  
F. Planas-Bohne ◽  
D.M. Taylor
Keyword(s):  
Molecular Weight ◽  
Binding Site ◽  
High Molecular Weight ◽  
Metal Concentration ◽  
Chelating Agents ◽  
Body Burden ◽  
The Body ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
Human Use

1 Male Sprague-Dawley rats were injected with 109CdCl2 (3 μmol Cd/kg) and killed between 1 h and 200 d afterwards. Metal concentration in the critical organs, i.e. liver and kidneys decreased very slowly. Within the cells Cd is found mainly in the cytosol and — at very early times — in the nuclei. Within the cytosol of the liver most of the metal is initially bound to proteins with high molecular weight but as early as 3 h after incorporation more than 90% is bound to metallothionein which is always the main binding site in the kidneys. 2 Of the chelating agents tested only BAL and Puchel were able to reduce the body burden significantly. Both are lipophilic substances. Puchel cannot reduce the kidney Cd burden but removes Cd from the liver only while BAL is effective in both organs. Both chelating agents exert their effects at doses which are too near to the LDso to be considered as safe enough for human use.

Effects of Lead Nitrate Induced Histological Changes in Liver of Male Sprague Dawley Rats

2021 ◽  
Vol 15 (11) ◽  
pp. 2948-2950
Author(s):  
Sumaira Abbasi ◽  
Mushtaq Ahmad ◽  
Kaukab Anjum ◽  
Amaidah Mir ◽  
Ayesha Irfan ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Free Radicals ◽  
Lead Nitrate ◽  
Normal Diet ◽  
The Body ◽  
Central Vein ◽  
Sprague Dawley ◽  
Toxic Agent ◽  
Sprague Dawley Rats ◽  
Group B

Lead is a highly toxic agent and a potent risk factor for various diseases as its quantity in an environment is increasing day by day. Aim: To observe and analyze the lead nitrate induced histomorphological changes in the liver of Sprague Dawley rats. Study Design: Experimental Study. Methodology: Animals of group A (control) were fed on normal diet but the animals of group B were given 50mg/kg of lead nitrate dissolved in 10ml of distilled water through oral gavage for 14 days daily. SPSS version 22 was used for data analysis. All the quantitative data was expressed as means ± SD. One Way ANOVA followed by Post Hoc Tukey test was applied. Results: Degenerative effects were noted. The number of Inflammatory and Kupfffer cells is increased with decreased in the body weight. Steatosis and central vein congestion were also present. Conclusion: It was concluded that degenerative effects histologically may be due to oxidative stress produced by formation of free radicals and denaturation of proteins by lead nitrate. Keywords: Lead, Liver, Central Vein Congestion, Oxidative Stress and Free Radicals.

Potential Using of Molecular Characterization and Structure of The Gut Bacterial Community for Postmortem Interval Estimation in Sprague Dawley Rats

2020 ◽  
Author(s):  
Huan Li ◽  
Siruo Zhang ◽  
Ruina Liu ◽  
Lu Yuan ◽  
Di Wu ◽  
...  
Keyword(s):  
Bacterial Community ◽  
High Throughput Sequencing ◽  
Interval Estimation ◽  
The Body ◽  
Time Of Death ◽  
Sprague Dawley ◽  
Upward Trend ◽  
Time Intervals ◽  
Taxa Richness ◽  
Sprague Dawley Rats

Abstract Once the body dies, the inherent microbes of the host begin to break down from the inside and play a key role thereafter. It is hypothesized that after the death certain rectal microbes would change during the decomposition course in the body. This study aimed to investigate the probable shift in the composition of the rectal flora at different time intervals up to 15 days after death and to explore bacterial taxa important for estimating the time of death. At the phylum level, Proteobacteria and Firmicutes showed major shifts, when checked at 11 different intervals, and emerged at most of the postmortem intervals. At the species level, Enterococcus faecalis and Proteus mirabilis existed at most postmortem intervals; the former showed a downward trend after day 5 postmortem, while the latter showed an upward trend. There were obvious differences in bacterial community structure and richness at the phylum, genus, and species levels during the decomposition of the corpse of rats. The phylum, genus, and species taxa richness decreased initially and then increased significantly. The turning point came on day 9 when genus, rather than phylum or species, contained the most information for estimating the time of death. We constructed a prediction model using genus taxon data from high-throughput sequencing, which explained 87.2% of the time since the first sampling within 1 h. Seven bacteria, namely Enterococcus, Proteus, Lactobacillus, unidentified Clostridiales, Vagococcus, unidentified Corynebacteriaceae, and unidentified Enterobacteriaceae, were included in this model. The above-mentioned bacteria showed a promising future for estimating the shortest time of death and results of current study were agreeing with the proposed hypothesis.

Strain difference in thermoregulation of rats surviving extreme heat

1982 ◽  
Vol 52 (2) ◽  
pp. 410-415 ◽  
Author(s):  
F. Furuyama
Keyword(s):  
Body Temperature ◽  
Heat Tolerance ◽  
Strain Difference ◽  
Body Weight Loss ◽  
The Body ◽  
Sprague Dawley ◽  
Survival Times ◽  
Sprague Dawley Rats ◽  
Thermoregulatory System ◽  
Different Strains

The survival times of unanesthetized rats in 42.5 degree C. 48% rh were studied in 12 different strains. In males, Sprague-Dawley rats (P less than 0.01) and Fisher 344/MK (P less than 0.05) showed significantly higher heat tolerance than the other 9 strains. Among Sprague-Dawley rats, females tolerated heat longer than males (P less than 0.05). There was no difference in lethal body temperature according to strains and exposure temperatures (38.5–48.5 degree C). Maximum survivable body temperature was 43.1 degree C in males and 43.3 degree C in females. The body weight loss in heat was greater in Sprague-Dawley, Fisher 344/MK, and JCL:Wistar strains. The degree of saliva spreading during the equilibrium period just below the maximum survivable body temperature correlated significantly with heat tolerance and was found to be the index of strain difference in heat tolerance. These findings demonstrated that the thermoregulatory system of rats is controlled genetically, though survival times of individuals in different strains sometimes overlap.

scholarly journals Walking with Neuropathic Pain: Paradoxical Shift from Burden to Support?

2015 ◽  
Vol 2015 ◽  
pp. 1-3 ◽  
Author(s):  
David J. Kopsky ◽  
Jan M. Keppel Hesselink ◽  
Roberto Casale
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Neuropathic Pain ◽  
Unusual Case ◽  
Body Schema ◽  
The Body ◽  
Sensory Loss ◽  
Pain Patient ◽  
Rehabilitation Programs ◽  
Cord Injury

Baclofen 5% cream can be used for the treatment of neuropathic pain. We describe an unusual case of a neuropathic pain patient with spinal cord injury. A 71-year-old woman with a partial spinal cord injury lesion at L4 complained of tingling, pins and needles, and burning in her legs. She scored her pain as 6 before adding baclofen 5% cream to her pain medication (pregabalin 450 mg, acetaminophen 3000 mg, and diclofenac 150 mg daily). One month later she experienced complete pain relief, though experienced increased difficulties in walking, leading to frequent falls. Her steadier walking without stumbling and falling was more important to her than pain reduction. Thus she decided to stop using baclofen. This unusual case report discusses two important issues that relate to pain medicine and rehabilitation in patients with painful spinal cord lesions: (1) the presence of wide areas of sensory loss “covered” by the presence of painful sensations and (2) pathological sensations that can be used and integrated in the body schema to create an improved spatiovisual orientation and thus mobility. Both these aspects have to be taken into account when treating pain and design rehabilitation programs.

scholarly journals α1D-Adrenoceptor blockade increases voiding efficiency by improving external urethral sphincter activity in rats with spinal cord injury

2016 ◽  
Vol 311 (5) ◽  
pp. R971-R978 ◽  
Author(s):  
Hirokazu Ishida ◽  
Hiroki Yamauchi ◽  
Hideaki Ito ◽  
Hironobu Akino ◽  
Osamu Yokoyama
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Lower Urinary Tract Dysfunction ◽  
Urethral Sphincter ◽  
Sprague Dawley ◽  
External Urethral Sphincter ◽  
Detrusor Sphincter Dyssynergia ◽  
Sphincter Electromyography ◽  
Sprague Dawley Rats ◽  
Cord Injury

Ideal therapy for lower urinary tract dysfunction in patients with spinal cord injury (SCI) should decrease detrusor overactivity, thereby promoting urine storage at low intravesical pressure and promoting efficient voiding at low pressure by decreasing detrusor-sphincter dyssynergia. Here we investigated blockade of various α-adrenoceptors to determine the subtype that was principally responsible for improving the voiding dysfunction. The effects of the intravenous α-blocker naftopidil, the α-blocker BMY 7378, and the α-blocker silodosin were evaluated using cystometrography and external urethral sphincter-electromyography (EMG) in decerebrated, unanesthetized female Sprague-Dawley rats with chronic SCI following transection at Th8. Parameters measured included the voided volume, residual volume, voiding efficiency, and burst and silent periods on EMG. Compared with values in decerebrated non-SCI rats, EMG of decerebrated SCI rats revealed more prominent tonic activity, significantly shorter periods of bursting activity, and a reduced ratio of the silent to active period during bursting. Compared with the value before drug administration (control), the voiding efficiency was significantly increased by naftopidil (1 and 3 mg/kg) (<0.05 each), and the burst (<0.01 and <0.05, respectively) and silent periods (<0.01 each) on EMG were significantly lengthened. BMY 7378 (1 mg/kg) significantly increased voiding efficiency and lengthened the burst periods (<0.05 each). Silodosin did not affect any parameters. These results suggest that α-blockade reduces the urethral resistance associated with detrusor-sphincter dyssynergia, thus improving voiding efficiency in SCI rats.

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