Effect of LSD-25 in the Rat on Operant Approach to a Visual or Auditory Conditioned Stimulus

1967 ◽  
Vol 20 (1) ◽  
pp. 199-205 ◽  
Author(s):  
Donald F. Caldwell ◽  
Edward F. Domino
Keyword(s):  
Treatment Group ◽  
Conditioned Stimulus ◽  
Auditory Stimulus ◽  
Food Reward ◽  
Light Stimulus ◽  
Albino Rats ◽  
Response Decrement ◽  
Stimulus Modality ◽  
Stimulus Value

Albino rats ( N = 200) required progressively more time per trial to perform a previously learned response to obtain food reward than saline and untreated controls following administration of increasing doses of LSD-25 (100, 200, 400 μg/kg). Ss conditioned to respond to a light stimulus showed more response decrement than animals cued by an auditory stimulus for increasing LSD-25 levels. Within each stimulus modality, a greater response decrement was observed following administration of LSD-25 for the higher intensity stimulus value for all but one treatment group. Results were discussed in relation to reports of sensitization and sensory blockage actions for LSD-25.

scholarly journals Biochemical, Histopathological and Mutagenic Changes Following the Co-administration of Antihelminthic and Antimalarial Drugs in Wistar Rats

2019 ◽  
pp. 1-12
Author(s):  
A. A. Obiajunwa ◽  
E. T. Idowu ◽  
O. A. Otubanjo
Keyword(s):  
Body Weight ◽  
Treatment Group ◽  
Fatty Infiltration ◽  
Portal Tract ◽  
Renal Tissue ◽  
Albino Rats ◽  
Male Adult ◽  
Treatment Groups ◽  
Combination Treatments ◽  
Therapeutic Doses

Aim: To determine the effects of antimalaria and antheminthic drugs combination in the incidence of histopathological alteration and biochemical modulations in liver and kidney of albino rats. Place and Duration of Study: The study was undertaken at the Zoology Department University of Lagos Akoka Lagos Nigeria. Methodology: A total of twenty (25) Male adult albino rats of 13-15 weeks old were divided into 5 groups of 5 rats each and daily oral administration of human therapeutic doses of praziquantel (PZQ 50 mg/kg body weight) separate and in combination with ivermectin (IVM 0.4 mg/kg body weight), albendazole (ALB 15 mg/kg body weight) and Artemether-lumefanthrine (ACT 140 mg/kg body weight) was administered with the  group which serve as the control receiving 1ml distilled water. Toxic effects due to these treatments were investigated using histopathological, biochemical and mutagenic indices at day 8th and 15th of the study. Results: Biochemical assessment revealed significant reduction in AST, ALT, ALP and potassium in the treatment group compared to the control. Increase in the level calcium, Albumin and bicarbonate were also observed in treatment groups. Histopathological assessment of the liver showed a general incidence of focal inflammation along the portal tract area, but did not show any differential severity across treatment groups except for single PZQ treatment group which were characterized by fatty infiltration. A general occurrence of mesangial damage and glomerula injury was observed in kidney tissues. Renal lesions were more severe in single PZQ + IVM treatment groups while mild lesions characterized renal tissue from PZQ+ACT treatment groups. Mutagenic effects as indicated by the high incidence of sperm head abnormalities was recorded across combination treatments especially in PZQ+ IVR and PZQ+ ACT groups. Conclusion: Findings suggest that combination therapies are synergistic and could result in nephrotoxicity, antidiuretic effects, dehydration and mutagenicity at human therapeutic doses.

Response Decrement as a Function of Effort

1968 ◽  
Vol 20 (3) ◽  
pp. 301-304 ◽  
Author(s):  
Gloria Fischer ◽  
Wayne Viney ◽  
James Knight ◽  
Neil Johnson
Keyword(s):  
Acquisition Training ◽  
Straight Alley ◽  
Albino Rats ◽  
Reactive Inhibition ◽  
Response Decrement

Albino rats were given acquisition training on a 6 ft. enclosed straight alley runway which could be adjusted for inclinations of 0°, 20°, and 40°. After receiving equal training on each of the three effort conditions, three groups of subjects were given massed extinction trials for 30 min. on only one effort condition. Results indicated fewer responses during extinction under the greater effort conditions. These results support a relation between effort and response decrement in extinction, consistent with the predictions of Hull's theory of reactive inhibition.

scholarly journals The effects of ursodeoxycholic acid in the management of sepsis-induced cholestasis in rodents

2019 ◽  
Author(s):  
Randa H. Ainosah ◽  
Magda M. Hagras ◽  
Sameer Alharthi ◽  
Omar I. Saadah
Keyword(s):  
Treatment Group ◽  
Bacterial Infection ◽  
Ursodeoxycholic Acid ◽  
Therapeutic Option ◽  
Flow Cytometric Analysis ◽  
Treated Group ◽  
Significant Rise ◽  
Albino Rats ◽  
Immunomodulatory Activity ◽  
Tnf Α

Abstract Background: Cholestasis is a condition in which there is impairment of bile flow from the liver to the small bowel. It is a common complication of bacterial infection and sepsis. Treatment is usually directed towards the eradication of bacterial infection and consequences of sepsis. Ursodeoxycholic acid (UDCA) has been under investigation as a possible therapeutic option for the treatments of sepsis-associated cholestasis.Methods: Sixty male albino rats (weighing 100–150g) were subjected to daily doses of UDCA (100 mg/kg, p.o.) for 10 days before or after lipopolysaccharides (LPS) induction of cholestasis. Then, the following liver enzyme activity was assessed: plasma aspartate transferase (AST), plasma alkaline transferase (ALT), plasma alkaline phosphatase (ALP), total bilirubin (TBIL). Hepatocyte apoptosis and immunomodulatory activity were assessed by flow cytometric analysis. Plasma pro-inflammatory cytokines (TNF-, IL-1 and IL-4) were measured by ELISA. Liver histology changes were assessed by hematoxylin and eosin (H&E) staining.Results: Our results showed that LPS-induced cholestasis resulted in a significant rise in the TBIL and liver enzymes including GGT, ALP, AST, and hepatocytes death. UDCA improves serum liver chemistries and halts bile acid cytotoxicity when it was used either as a treatment or prevention, compared to the LPS group. Moreover, UDCA has immunomodulatory properties: the effect of UDCA on the percentage of natural killer (NK) cells did not change in either the treatment or prevention group when compared to LPS induced cholestasis. However, significant decrease in the CD3 has been found in the treatment group as compared to the LPS group, and an unexpected increase in the prevention group compared to the LPS treated group. UDCA failed to ameliorate the increase in plasma TNF-α concentration in the treatment group. On the other hand, UDCA caused reduction in plasma TNF-α in the prevention group. We also found significant reduction in the liver tissue apoptosis in the UDCA treated groups. Conclusion: Prophylactic treatment and treatment with UDCA appear to exert a beneficial effect against the damaging effect of hydrophobic bile acids by LPS-induced secretary failure. This involved multiple mechanisms of action.

The Inhibitory Ability of Orobanche Extract on Calcium Oxalate Lithiasis in Male Albino Rats

2020 ◽  
Author(s):  
A. M. Kamal ◽  
M. S. Taha
Keyword(s):  
Treatment Group ◽  
Ethylene Glycol ◽  
Kidney Tissue ◽  
Inhibitory Effect ◽  
Control Group ◽  
Albino Rats ◽  
Potential Candidate ◽  
Group 4 ◽  
Group 5 ◽  
Group 2

The present study aimed to evaluate the inhibitory effect of Orobanche extract in ethylene glycol induced nephrolithiasis. Thirty male albino rats were divided into five groups each group contains 6 animals, group (1) control group, group (2) animals were supplied with 0.75% ethylene glycol in drinking water, group (3) animals were administrated Orobanche extract 3g/kg orally, group (4) animals were administrated Cystone 500 mg/kg in addition to 0.75% ethylene glycol, group (5) animals were administrated Orobanche extract 3g/kg orally in addition to 0.75% ethylene glycol the experiment continued for 28 days. Serum and the kidney homogenates were analyzed for various biochemical parameters and urine was examined microscopically for crystals. Orobanche treatment group and Cystone treatment group significantly decreased phosphorus, Calcium and Oxalate in kidney tissue of nephrolithiasis rats and significantly decreased kidney and liver marker in serum of nephrolithiasis rats. Conclusion this result revealed that Orobanche extract could be a potential candidate for phytotherapy against nephrolithiasis.

Behavioral estimates of absolute threshold in rat

1994 ◽  
Vol 11 (6) ◽  
pp. 1077-1082 ◽  
Author(s):  
Carmen Muñoz Tedó ◽  
Pilar Herreros De Tejada ◽  
Daniel G. Green
Keyword(s):  
Light Intensity ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Light Stimulus ◽  
Absolute Threshold ◽  
Albino Rats ◽  
Water Reinforcement ◽  
Behavioral Experiments ◽  
Psychophysical Threshold ◽  
Behavioral Methods

AbstractDark-adapted thresholds of albino and pigmented rats were estimated using behavioral methods. Albino and pigmented rats who had been water deprived learned to bar press for water reinforcement when a light stimulus was presented. Absolute threshold was defined to be the light intensity at which bar pressing behavior was significantly modified by the presence of the light stimulus. Albino rats had an average threshold of −5.23 log cd/m2 and the pigmented rats had a threshold of −5.0 log cd/m2. These values are close to −5.3 log cd/m2, the psychophysical threshold of human observers in the same apparatus. Consistent with our earlier electrophysiology, these behavioral experiments provide no evidence for an albino/pigmented sensitivity difference. Comparisons are made between behavioral and electrophysiological determinations of absolute threshold in albino and pigmented rats. Thresholds determined behaviorally agree remarkably well with those derived from visual evoked potentials.

Primary and Secondary Motivational Properties of a Light Stimulus

1974 ◽  
Vol 34 (3) ◽  
pp. 799-809 ◽  
Author(s):  
Charles L. Goodrick
Keyword(s):  
Food Reward ◽  
Light Stimulus ◽  
Training Condition ◽  
Reward Schedule ◽  
Directional Effect ◽  
Continuous Reward ◽  
Bar Test ◽  
Increasing Function ◽  
Secondary Reinforcing

Rats were trained on a continuous reward schedule (CRF) in a 2-bar test box with or without light contingency associated with food reward. During extinction trials with the light contingency presented on CRF, the light contingency was shown to facilitate extinction on the basis of response totals (energizing effect) and percentage of responses on the reward bar (directional effect). For these extinction trials, no evidence was obtained for secondary reinforcing (Sr) properties of the light contingency. However, a second experiment found a strong Sr energizing effect when the light contingency was presented on a FR-5 or FR-10 schedule during extinction trials. These energizing effects were also obtained for rats trained without the light contingency, but to a lesser degree than for rats trained with the light contingency. Presentation of the light contingency on a FR schedule during extinction trials also resulted in a strong directional effect for all groups, regardless of the training condition. A moderately durable energizing effect of Sr was obtained which was an increasing function of partial periodic Sr during extinction trials.

scholarly journals THE ROLE OF HEPARIN IN TREATMENT OF EXPERIMENTAL PERITONITIS

2019 ◽  
pp. 1-5
Author(s):  
Pradeep Kumar Saxena
Keyword(s):  
Single Dose ◽  
Survival Rate ◽  
Treatment Group ◽  
Normal Saline ◽  
Adhesion Formation ◽  
Treated Group ◽  
Repeated Dose ◽  
Control Group ◽  
Albino Rats ◽  
Bowel Loop

Background: To produce peritonitis experimentally in albino rats by creation of a necrotic loop of terminal Ileum. Study of peritonitis and gross changes in peritoniteal cavity and to study the effect of single dose heparin (Anticoagulant) in experimentally produced peritonitis. Also to study and compare the effect of repeated small dosage of heparin in peritonitis. Material and Methods The rats were divided into 6 groups, under the 2 experiments. So each group comprised of 8 rats. The peritonitis was proceduced by Rasto's method, in which the peritonitis was caused by a gangrenous loop of small intestine . two types of experiment were carried out: 1. Experiment 1 : The gangrenous loop which produced peritonitis was excised after 24 hours, normal saline was given in control group,whereas heparin as a single dose and heparin in small repeated dose were given by sub-cutaneous or intraperitoneal route for 3 days. No abdominal toilet or antibiotics were given during the time. The surviving as well as the dead rats during observation period were subjected to laparotomy and detailed pathology of peritoneum was studied. 2. Experiment 2 : In this group the gangrenous loop was not resected after 24 hours and normal saline was given in control group 0.2 ml., or heparin in a single dose 50 I.U. or heparin in small repeated dose 20 I.U. twice a day for three days.All the rats were continuously observed during the post-operative period for evidence of any complications. Results: The peritonitis produced by a necrotic bowel loop was severe & brino-purulent.The formation of inter-mesentric abscess in control group was much more evident than the heparinised rats. The size of inter-mesentric abscess was smaller in treated group of albino rats than in control.The incidence of adhesion formation was much more in control group, than in the heparin group, the adhesion were very less friable and easily breakable. The survival rate in heparin treatment group was 75% to 87.5% as compared to the control group, where the survival rate was 50% only.The mortality in the control group, where the necrotic loop, was not resected was as high as 87.5% and rats died within 8 days after operation whereas the mortality rate in treatment group was low that is, from 50% to 60% only. Conclusion: By comparison and contrast of the results of the difference treatment group, it become evident that survival in the treated group was signicantly better than control group. About the evidence of intra-peritoneal infection, it shows that in treated group clearance of peritonitis was much faster than the control group of albino rats:The number and size of intramesentric abscesses were also smaller in treated group. There was also a little benecial effect on adhesion in heparinised albino rats as compared to control group.So heparin in small repeated doses has denitely a signicant effect on secondary bacterial peritonitis and its subsequent results.

scholarly journals Reproductive Toxicity and Biomarker Response to a Daily Dose of Tramadol in Male Albino Rats (Rattus norvegicus)

2019 ◽  
pp. 1-7
Author(s):  
E. Oriakpono, Obemeata ◽  
M. Ajah, Ogechi
Keyword(s):  
Treatment Group ◽  
Liver Damage ◽  
Sperm Count ◽  
Control Group ◽  
Albino Rats ◽  
Biomarker Response ◽  
Daily Dose ◽  
Group 3 ◽  
Group 5 ◽  
Group 2

This study was designed to evaluate the effect of a daily dose of tramadol on selected biomarkers viz: haematological parameters, sperm count, kidney and liver damage in male albino rats. Twenty four wistar rats were divided randomly into two groups: control group and treated groups, the treated group were further divided into four groups and housed in cages. Clean drinking water was served to control (group 1), and 1.6 mg/kg bodyweight of tramadol was administered to group 2 (7 days treatment), group 3 (14 days treatment), group 4 (21 days treatment) and group 5 (21 days treatment +7 days withdrawal) in addition to a daily standard diet for all groups. Treatment of rats with tramadol caused significant decrease (P<0.05) in WBC, platelet and lymph. in group 2, on bicarbonate, AST and protein, it showed significant decrease (P<0.05) in group 3, and it showed significant decrease (P<0.05) in group 5 on Cl-, AST, ALT, bicarbonate, AST, PCV, Hb, RBC, WBC, platelet, lymphocytes and sperm count. The results indicates that tramadol has negative effects on the liver which may induce severe liver damage when used for a prolonged period, the results also shows that tramadol can cause anaemia as seen by the observed negative changes in the blood parameters evaluated. Therefore, administration should be with great caution and from a licensed pharmacist or doctor while self prescription or over the counter administration should be avoided considering the associated adverse effects.

scholarly journals Ellagic Acid Activity in Healing Process of Incision Wound on Male Albino Rats (Rattus norvegicus)

2017 ◽  
Vol 3 (6) ◽  
pp. 224
Author(s):  
Hardany Primarizky ◽  
Wiwik Misaco Yuniarti ◽  
Bambang Sektiari Lukiswanto
Keyword(s):  
Wound Healing ◽  
Treatment Group ◽  
Ellagic Acid ◽  
Healing Process ◽  
Control Group ◽  
Albino Rats ◽  
Wound Healing Process ◽  
Treatment Groups ◽  
Significant Difference ◽  
Incision Wound

This study was conducted to prove whether ellagic acid can be used as a regulator of incision wound healing process in male albino rats as experimental animals. A total of 24 male healthy rats based on physical examination, aged at 3 months old and weight at 150-180 grams used in this study. Rats were divided into three groups and each group has 8 replications, group of control (P0) has no incision wound and no medication, treatment group (P1) has incision wound and treated with Betadine® and (P2) has incision wound and treated with 2,5 % ellagic acid. The variable that observed are histopathology changes (collagen, PMN, angiogenesis and fibrosis) from the male albino rats. The samples collection was taken at day 15 and data were collected and analyzed by Analysis of Variance (ANOVA) test. The result of collagen and PMN cells score in the control group (P0) were 1.80 ± 0.16 and 1.6 ± 0.08 with mild angiogenesis and no fibrosis. The results in the treatment (P2) group, where the collagen and PMN scores were 1.60 ± 0.08 and 1.5 ± 0.8, accompanied by mild angiogenesis and fibrosis. Meanwhile, in the treatment (P1) group, the results of scoring of collagen and PMN were lower than the other groups, 0, 80 ± 0.08 and 0.6 ± 0.16 accompanied by moderate angiogenesis and fibrosis. There was a significant difference of collagen scoring, PMN cells number, fibrosis and angiogenesis among the treatment groups (p<0.05). P1 treatment group has significant different with treatment groups P0 and P2 (p<0.05), but there is no significant difference between treatment groups P0 and P2 (p>0.05).  From the results, it can be concluded that the topical application of ellagic acid ointment was proved to provide healing process on incision wound. Topical administration of ellagic acid ointment for 14 days was able to improve the skin condition and promoted the wound healing.Keywords: Ellagic acid ; wound healing ; collagen ; angiogenesis ; fibrosis ; anti-inflammatory ; antioxidant ; antibacterial.

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