Expression of Slit2 and Robo Receptors in a Sprague-Dawley Rat Glaucoma Model

2021 ◽  
Author(s):  
Yoon-Jung Choy ◽  
Jae-Ho Shin ◽  
Jee-Hyun Choi
Keyword(s):  
Ganglion Cell Layer ◽  
Cell Layer ◽  
Control Group ◽  
Retinal Ganglion ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
High Tension ◽  
Robo Receptors ◽  
Acute Glaucoma ◽  
Experimental Group

Background: This study investigated immunoreactive changes in Slit2 and Robo receptors in the retinal ganglion cell layer of a rodent model of acute glaucoma. Methods: Glaucoma model using Sprague-Dawley rats was made via weekly intracameral injections of hyaluronic acid. Intraocular pressure (IOP) was measured twice weekly for 4 weeks using a rebound tonometer in an experimental group of 10 rats and a control group of five rats for 4 weeks. The trimmed retinas were processed for anti-glial fibrillary acidic protein (GFAP), anti-Slit2 and anti-Robo1, anti-Robo2, anti-Robo3 and anti-Robo4 immunochemical analysis. Result: The IOPs in the experimental group were approximately four times higher than IOPs in the control group. The GFAP, Slit2 and Robo4 immunoreactivity in the experimental group was higher than the corresponding values in the control group. Our results indicate that Slit2 and Robo4 potentially contribute to the progression of high tension glaucoma, especially in inducing ischemic injury.

scholarly journals Ameliorative effects of Spinacia oleracea on sperm morphology, count, and motility by normalizing the obesity-induced oxidative stress in Sprague Dawley rats

2020 ◽  
Vol 14 (03) ◽  
pp. 124-127
Author(s):  
Somia Iqbal ◽  
Noman Sadiq ◽  
Saad Siddiqui ◽  
Hira Iqbal
Keyword(s):  
Sperm Concentration ◽  
Treated Group ◽  
Sperm Parameters ◽  
Control Group ◽  
Sprague Dawley ◽  
Normal Morphology ◽  
Sprague Dawley Rats ◽  
Group A ◽  
Group B ◽  
Experimental Group

Background: Obesity is a prevailing metabolic disorder that affects the functioning of the male reproductive system. Excessive adipose tissue enhances reactive oxygen species generation and is linked with male infertility. Spinach has demonstrated antioxidant effects. The present study was conducted to determine the antioxidant effects of spinach on sperm parameters in obese Sprague Dawley rats. Subjects and methods: This randomized control study was conducted at the animal house of the National Institute of Health Islamabad, Islamic International Medical College, Cosmesurge International Hospital, Rawalpindi, and Apollo lab, Islamabad, Pakistan from April 2016 to March 2017. Forty male Sprague Dawley rats having an age of 8 weeks and weight 160-200g were tagged from number 1 to 40. Every third rat was randomly allocated to control Group A (n=13) and remaining into the Experimental group (n=27). Rats of control Group A was given a standard diet while a high-fat diet was given to Experimental group rats to induce obesity for the duration of six weeks. Weight (g) was measured weekly and obesity was confirmed when rats attain more than 20% weight when compared with that of rats of control Group A. Then, after obesity induction, the experimental group was alienated into the obesity control group (Group B) and spinach treated group (Group C). For sample, rats of Group A and Group B were sacrificed, and the cauda epididymis of each rat was placed in a Petri dish containing normal saline and cut into pieces to allow the release of sperm and then sperm parameters (sperms concentration, motility, and morphology) were recorded under the microscope. Then, spinach (5% hot water extract) along with the persistence of fat diet was administered to Group C for 4 weeks and finally, sperm parameters were measured in this group. Results: Sperm concentration/ml, motility (%), and normal morphology (%) of Group B rats were significantly decreased as compared to Group A rats. However, sperm concentration/ml, motility (%), and normal morphology (%) of Group C (spinach treated group) rats was significantly increased (p<0.001) as compared to Group B (obesity control group) rats after administering spinach. Conclusion: The addition of Spinach in a normal diet regimen restores normal sperm morphology, improves sperm motility and concentration.

The cartilage degeneration in a growing rat experimental model of developmental trochlear dysplasia is associated with activation of PI3K/AKT signal pathway

2020 ◽  
Author(s):  
Wei Lin ◽  
Yike Dai ◽  
Jinghui Niu ◽  
Chongyi Fan ◽  
Xunkai Feng ◽  
...  
Keyword(s):  
Trochlear Dysplasia ◽  
Cartilage Degeneration ◽  
Signal Pathway ◽  
Control Group ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
Growing Rat ◽  
Polymerase Chain ◽  
Underlying Mechanisms ◽  
Experimental Group

Abstract Background As one of the lower extremity deformities in human, trochlear dysplasia is a commonly encountered disease. However, the molecular mechanism of cartilage degeneration in trochlear dysplasia is indefinite yet. It was apparent to all that PI3K/AKT signal pathway is extremely significant in regulating the pathophysiological process of cartilage degeneration. The purpose of this research is to discuss the correlation between PI3K/AKT signal pathway and trochlear dysplasia cartilage degeneration. Materials and methods 120 female Sprague-Dawley rats at 4 weeks of age were separate into control group and experimental group randomly. The distal femurs were isolated from the experimental and unsurgeried control group at the point of the 4, 8, 12 weeks, correspondingly. Micro-CT and histological examination were carried out to investigate the anatomical structure and cartilage changes of the trochlear. Subsequently, the expression of PI3K/AKT, TGFβ1 and ADAMTS-4 in cartilage were investigated by immunohistochemistry and quantitative real-time polymerase chain reaction (qRT-PCR). Results In the experimental group, the trochlear dysplasia model was successfully established at 8 weeks after surgery. Moreover, the cartilage degeneration was found from 8 weeks, with continued higher protein and mRNA expression of PI3K/AKT, TGFβ1 and ADAMTS-4 compared with the control group. Conclusions This research suggested that patellar instability may lead to trochlear dysplasia in growing rats. Moreover, trochlear dysplasia was probably one of the causes of patellofemoral osteoarthritis and the cartilage degeneration in trochlear dysplasia might be associate with activation of PI3K/AKT signal pathway. However, more research was required to clarify the underlying mechanisms.

scholarly journals IMPACT OF ZOLEDRONATE BISPHOSPHONATE GEL IN VIRGIN COCONUT OIL ON THE INCREASE OF OSTEOCLAST APOPTOSIS

2018 ◽  
Vol 9 ◽  
pp. 24
Author(s):  
Carolin Parlina ◽  
Erni H Purwaningsih ◽  
Ahmad Aulia Jusuf ◽  
Retno Widayati
Keyword(s):  
Buccal Mucosa ◽  
Caspase 3 ◽  
Coconut Oil ◽  
Control Group ◽  
Sprague Dawley ◽  
Emulsion Gel ◽  
Sprague Dawley Rats ◽  
The Impact ◽  
Experimental Group ◽  
Osteoclast Apoptosis

Objective: This study aimed to show the impact of the ZOL in VCO gel (Ge-ZOL) on the extent of osteoclasts apoptosis.Methods: The study used 27 Sprague-Dawley rats which were divided into three groups: Nine rats in the experimental group were given 40 µg of Ge-ZOL, nine rats in the control group were given VCO emulsion gel without ZOL (Ge-), and nine rats in the normal group were not given any treatment. The gel was applied to the buccal mucosa using a cotton bud for 2 min at hour of 0, 4, and 8 on days 0, 1, 2, 3, and 4. The rats were sacrificed on days 1, 3, and 5, and then, evaluated by immunohistochemical caspase-3 staining.Result: The number of apoptotic osteoclast cells in the experimental group was significantly higher than in the control and normal groups (p<0.05). The number of apoptotic osteoclast cells in the experimental group on the day 1 was significantly higher than on the days 3 and 5 (p<0.001).Conclusion: The application of Ge-ZOL to the buccal mucosa proven to improve the number of apoptotic osteoclast cells in the experimental group on the day 1, and this number was higher than on the days 3 and 5.

On Effects of Paternal Ethanol Treatment on Fetal Outcome

1985 ◽  
Vol 57 (1) ◽  
pp. 51-57 ◽  
Author(s):  
H. Cake ◽  
I. Lenzer
Keyword(s):  
Litter Size ◽  
Fetal Outcome ◽  
Ethanol Administration ◽  
Control Group ◽  
Ethanol Treatment ◽  
Sprague Dawley ◽  
Water Control ◽  
Sprague Dawley Rats ◽  
Experimental Group ◽  
Low Dosage

To study the effects of paternal chronic low-dosage ethanol administration on fetal outcome, male Sprague-Dawley rats received either .6g/ kg ethanol (experimental group) or water (control group). Males were mated between the fourth and seventh weeks of treatment. Pregnancies were terminated on gestational Day 21. Cerebral weight and placental weight in offspring of the ethanol-treated males were significantly larger than those of control males. There was no effect on litter size. Experimental females (dams that became pregnant when paired with an ethanol-treated male) were significantly heavier than control dams. Since these pairings were random at every mating, the experimental males appeared to have been more successful impregnating heavier than lighter females.

scholarly journals Emotional Stress- and Pain-Related Behaviors Evoked by Experimental Tooth Movement

2008 ◽  
Vol 78 (3) ◽  
pp. 487-494 ◽  
Author(s):  
Joseph H. Yozgatian ◽  
Jorge L. Zeredo ◽  
Hitoshi Hotokezaka ◽  
Yoshiyuki Koga ◽  
Kazuo Toda ◽  
...  
Keyword(s):  
Open Field ◽  
Emotional Stress ◽  
Tooth Movement ◽  
Orthodontic Tooth Movement ◽  
Control Group ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
Animal Activity ◽  
Experimental Group ◽  
Experimental Tooth Movement

Abstract Objective: To investigate by behavioral methods the relationship between emotional stress and pain during experimental tooth movement in rats. Materials and Methods: Sixteen male Sprague-Dawley rats (210 to 250 g) were divided into two groups. The experimental group was treated with an active Ti-Ni appliance, and the control group received a passive appliance. A force of 20 gf was delivered by the active appliance between the maxillary first and second molars for 3 days. During this period the rat's behavior was evaluated eight times by means of open-field test and resistance-to-capture test. The specific parameters of animal activity were facial grooming, rearing, and locomotor activity, movement into the center of the open field, and response to capture. Results: Parameters related to stress and pain were higher in the group carrying active appliance, compared to the group with a passive appliance. Statistically significant differences in stress-related behavior between control and experimental groups were found 8 hours after placing the appliance and were most evident on the second day. Pain-related behavior was significantly greater in the experimental group than in the control group at 24 hours. Conclusions: The increase in emotional stress evoked by orthodontic tooth movement may precede the appearance of periodontal pain.

The ultrastructure of rat jejunal enterocytes after colchicine application

1978 ◽  
Vol 36 (2) ◽  
pp. 538-539
Author(s):  
M. Pavelka ◽  
L. Stockinger
Keyword(s):  
Sodium Phosphate ◽  
Control Group ◽  
Sprague Dawley ◽  
Ultrastructural Studies ◽  
Sprague Dawley Rats ◽  
Lipid Particle ◽  
Electron Microscopical ◽  
Experimental Group ◽  
Colchicine Application

In jejunal enterocytes microtubules (mts) have been supposed to be involved in mechanisms of lipid particle transport. To elucidate the role of mts in this context detailed ultrastructural studies of rat jejunal enterocytes after application of the microtubule-inhibiting substance colchicine have been performed.Material and Methods: Female Sprague-Dawley rats having been fasted for 24 hours received 0. 5 mg colchicine per 100 g body weight dissolved in 1. 0 ml of 0. 9% NaCl (experimental group) or 1. 0 ml of 0. 9% NaCl (control group) intraperitoneally. Segments of the upper jejunum were excised 11/2, 23, 4 and 6 hours later and prepared for electron- microscopical observation (Fixation:2. 5% sodium phosphate buffered glutaraldehyde, pH 7. 2; Postfixation: 1% veronalacetate buffered OsO4; Embedding in Epon; Staining with alcoholic uranylacetate and alkaline lead citrate).Results: The ultrastructural alterations after colchicine application concern predominantly mts and Golgi apparatus and are apparent already 11/2 hours after colchicine application.

scholarly journals Skeletal Muscle Metabolomic Responses to Endurance and Resistance Training in Rats under Chronic Unpredictable Mild Stress

2021 ◽  
Vol 18 (4) ◽  
pp. 1645
Author(s):  
Xiangyu Liu ◽  
Xiong Xue ◽  
Junsheng Tian ◽  
Xuemei Qin ◽  
Shi Zhou ◽  
...  
Keyword(s):  
Resistance Exercise ◽  
Endurance Exercise ◽  
Field Tests ◽  
Treadmill Running ◽  
Control Group ◽  
Mild Stress ◽  
Chronic Unpredictable Mild Stress ◽  
Sprague Dawley ◽  
Exercise Interventions ◽  
Sprague Dawley Rats

The objectives of this study were to compare the antidepressant effects between endurance and resistance exercise for optimizing interventions and examine the metabolomic changes in different types of skeletal muscles in response to the exercise, using a rat model of chronic unpredictable mild stress (CUMS)-induced depression. There were 32 male Sprague-Dawley rats randomly divided into a control group (C) and 3 experimental groups: CUMS control (D), endurance exercise (E), and resistance exercise (R). Group E underwent 30 min treadmill running, and group R performed 8 rounds of ladder climbing, 5 sessions per week for 4 weeks. Body weight, sucrose preference, and open field tests were performed pre and post the intervention period for changes in depressant symptoms, and the gastrocnemius and soleus muscles were sampled after the intervention for metabolomic analysis using the 1H-NMR technique. The results showed that both types of exercise effectively improved the depression-like symptoms, and the endurance exercise appeared to have a better effect. The levels of 10 metabolites from the gastrocnemius and 13 metabolites from the soleus of group D were found to be significantly different from that of group C, and both types of exercise had a callback effect on these metabolites, indicating that a number of metabolic pathways were involved in the depression and responded to the exercise interventions.

Ranitidine as an alcohol dehydrogenase inhibitor in acute methanol toxicity in rats

2009 ◽  
Vol 29 (2) ◽  
pp. 93-101 ◽  
Author(s):  
Amal A El-Bakary ◽  
Sahar A El-Dakrory ◽  
Sohayla M Attalla ◽  
Nawal A Hasanein ◽  
Hala A Malek
Keyword(s):  
Alcohol Dehydrogenase ◽  
High Performance ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Control Group ◽  
Sprague Dawley ◽  
Blood Samples ◽  
Methanol Poisoning ◽  
Sprague Dawley Rats

Methanol poisoning is a hazardous intoxication characterized by visual impairment and formic acidemia. The therapy for methanol poisoning is alcohol dehydrogenase (ADH) inhibitors to prevent formate accumulation. Ranitidine has been considered to be an inhibitor of both gastric alcohol and hepatic aldehyde dehydrogenase enzymes. This study aimed at testing ranitidine as an antidote for methanol acute toxicity and comparing it with ethanol and 4-methyl pyrazole (4-MP). This study was conducted on 48 Sprague-Dawley rats, divided into 6 groups, with 8 rats in each group (one negative control group [C1], two positive control groups [C2, C3] and three test groups [1, 2 and 3]). C2, C3 and all test groups were exposed to nitrous oxide by inhalation, then, C3 group was given methanol (3 g/kg orally). The three test groups 1, 2 and 3 were given ethanol (0.5 g/kg orally), 4-MP (15 mg/kg intraperitoneally) and ranitidine (30 mg/kg intraperitoneally), respectively, 4 hours after giving methanol. Rats were sacrificed and heparinized, cardiac blood samples were collected for blood pH and bicarbonate. Non-heparinized blood samples were collected for formate levels by high performance liquid chromatography. Eye balls were enucleated for histological examination of the retina. Ranitidine corrected metabolic acidosis (p = .025), decreased formate levels (p = .014) and improved the histological findings in the retina induced by acute methanol toxicity.

Mineralocorticoid Receptor Activation by Aldosterone or Corticosterone Induces Hypertension, Myocardial Infarction and Proteinuria

Hypertension ◽  
2000 ◽  
Vol 36 (suppl_1) ◽  
pp. 723-723
Author(s):  
Qing-Feng Tao ◽  
Diego Martinez vasquez ◽  
Ricardo Rocha ◽  
Gordon H Williams ◽  
Gail K Adler
Keyword(s):  
Myocardial Infarction ◽  
Drinking Water ◽  
Mineralocorticoid Receptor ◽  
Critical Role ◽  
Weight Ratio ◽  
Myocardial Necrosis ◽  
Receptor Activation ◽  
Control Group ◽  
Sprague Dawley ◽  
Sprague Dawley Rats

P165 Aldosterone through its interaction with the mineralocorticoid receptor (MR) plays a critical role in the development of hypertension and cardiovascular injury (CVI). Normally, MR is protected by 11β-hydroxysteroid dehydrogenase (11β-HSD) which inactivates glucocorticoids preventing their binding to MR. We hypothesis that if activation of MR by either aldosterone or glucocorticoids induces hypertension and CVI, then the inhibition of 11β-HSD with glycyrrhizin (GA), a natural inhibitor of 11β-HSD, should induce damage similar to that observed with aldosterone. Sprague-Dawley rats were uninephrectomized, and treated for 4 weeks with 1% NaCl (in drinking water) for the control group, 1% NaCl + aldosterone infusion (0.75 μg/h), or 1% NaCl + GA (3.5 g/l in drinking water). After 4 weeks, aldosterone and GA caused significant increases in blood pressure compared to control rats ([mean ± SEM] 211± 9, 205 ± 12, 120 ± 9 mmHg, respectively, p<0.001). Both aldosterone- and GA-treated rats had a significant increase in proteinuria (152.2 ± 8.7 and 107.7 ± 19.5 mg/d, respectively) versus controls (51.2 ± 9.5 mg/d). There was a significant increase (p<0.001) in heart to body weight ratio in the rats treated with aldosterone or GA compared with control (3.92 ± 0.10, 3.98 ± 0.88, and 3.24 ± 0.92 mg/g, respectively). Hearts of GA and aldosterone treated rats showed similar histological changes consisting of biventricular myocardial necrosis and fibrinoid necrosis of small coronary arteries and arterioles. These data suggests that in rodents activation of MR by either aldosterone or corticosterone leads to severe hypertension, vascular injury, proteinuria and myocardial infarction. Thus, 11β-HSD plays an important role in protecting the organism from injury.

scholarly journals Synergistic suppression of pre-perfusion of donor livers with recipient serum and cobra venom factor treatment on hyperacute rejection following liver xenotransplantation

2012 ◽  
Vol 27 (5) ◽  
pp. 301-305 ◽  
Author(s):  
Baohua Zhu ◽  
Chuanming Tong ◽  
Weitao Guo ◽  
Rong Pu ◽  
Guoping Zhang ◽  
...  
Keyword(s):  
Survival Time ◽  
Hyperacute Rejection ◽  
Cobra Venom ◽  
Control Group ◽  
Sprague Dawley ◽  
Donor Liver ◽  
Cobra Venom Factor ◽  
Sd Rats ◽  
Sprague Dawley Rats ◽  
And Control

PURPOSE: To investigate synergistic suppression of donor liver pre-perfusion with recipient serum (RS) and cobra venom factor (CVF) treatment on hyperacute rejection (HAR) following liver xenotransplantation. METHODS: Guinea-pigs (GP, n=24) and Sprague-Dawley rats (SD, n=24) were recruited. Before transplantation, serum was collected from SD rats and used for preparation of inactivated complements. GP and SD rats were randomly assigned into four groups (n=6), respectively: RS group, CVF group, RS+CVF group and control group. Orthotopic liver xenotransplantation was performed with modified two-cuff technique. The survival time and liver function of recipients, morphological and pathological changes in rat livers were investigated. RESULTS: There was no piebald like change in the recipient livers in all experiment groups. The survival time of recipients in all experiment groups was longer than that in control group (p<0.05). Moreover, the survival time in the RS+CVF group was markedly longer than that in the RS group (p<0.01) and CVF group (p<0.05). The serum ALT level in all experiment groups were lower than that in the control group (p<0.05). Furthermore, the ALT level in the RS+CVF group was significantly lower than that in the CVF group (p<0.05) and RS group (p<0.01). The histological damages were significantly improved when compared with the control group, and the histological damages in the RS+CVF group were milder than those in the remaining groups (p<0.05) CONCLUSION: Pre-perfusion of donor liver with recipient serum and cobra venom factor treatment can exert synergistic suppressive effects on the hyperacute rejection following liver xenotransplantation.

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