scholarly journals THE PHARMACOLOGICAL ACTION OF CHOLINERGIC SUBSTANCES ON NEW CORNEAL BLOOD VESSELS IN RATS

2021 ◽  
Vol 21 (1) ◽  
pp. 235-246
Author(s):  
DANIELA BIANCA DAMIAN DAMIAN ◽  
SANZIANA ISTRATE ◽  
MIHAIL ZEMBA ◽  
IOANA CRISTINA COMAN ◽  
AURELIAN MIHAI GHITA ◽  
...  
Keyword(s):  
Body Weight ◽  
Blood Vessels ◽  
Muscarinic Receptors ◽  
Wistar Rats ◽  
Pharmacological Action ◽  
Video Camera ◽  
Time Intervals ◽  
Rat Pups ◽  
Total Magnification ◽  
Microsoft Office

This study aimed to evaluate the existence of muscarinic receptors in the new corneal blood vessels, experimentally induced with ketamine in rat pups. The experimental model of neovascularization was performed on 15-day-old Wistar rats, in which 5 intraperitoneal injections of ketamine were administered at a dose of 150 mg/kg body weight at 5-day intervals. Examination of the reactivity of new corneal blood vessels was performed on day 45 of life. Each eye that developed neovascularization was evaluated with a Nikon stereomicroscope, coupled to a Mshot video camera, and the total magnification of the system was 400X. The vascular diameter was measured at a chosen point, the same point /points for each recording made to that eye, and the acquisition of images was performed at set time intervals, every 60 seconds for each eye to be examined, throughout the recording period. The parameters under investigation were the variations of the vascular diameter, and the processing of the obtained data was performed with the help of Microsoft Office Excel. Our results suggest that muscarinic receptors are present in the new corneal blood vessels because the administration of conjunctival instillations of acetylcholine caused statistically significant vasodilation, while atropine, a blocker of muscarinic receptors, antagonized this effect.

scholarly journals Gestational and neurodevelopmental effects of black mustard seeds' (Brassica nigra) extract in wistar rats

1970 ◽  
Vol 8 (1) ◽  
pp. 1368-1378
Author(s):  
Bernard Ufuoma Enaibe ◽  
Tolulope Timothy Arogundade ◽  
Oluwaseun Adigun ◽  
Foyeke Munirat Adigun ◽  
Emmanuel Olusola Yawson ◽  
...  
Keyword(s):  
Body Weight ◽  
Wistar Rats ◽  
Treated Group ◽  
Brassica Nigra ◽  
Female Rats ◽  
Rat Pups ◽  
Group A ◽  
Black Mustard ◽  
Group B ◽  
Mustard Seeds

This study investigated the effect of the crude aqueous extract of Brassica nigra (Black Mustard Seeds) in gestation and on the prefrontal cortex of newborn Wistar rats at different doses following prenatal administration. Eighteen (18) adult female rats weighing an average of 180±10g were used. The female rats were split into 3 groups of six animals; Group A received distilled water throughout gestation, Group B received 200 mg/kg body weight of extract throughout gestation, and Group C received 100 mg/kg body weight of extract throughout gestation). Rat pups from the experimental groups were sacrificed on postnatal days 1, 7, 14, 21, 28, and 35 and subsequently prepared through routine histological and histochemical procedures. Brassica nigra was abortifacient at 200 mg/kg body weight and reduced litter size at 100 mg/kg body weight. No observed physical deformities in pups of treated groups. Comparative prefrontal microarchitecture revealed little to no alteration in the treated group. This study concludes that Brassica nigra (black mustard) is not totally innocuous and as such, should be moderately consumed or totally avoided in pregnancy.Keywords: Brassica nigra; Mustard seeds; Gestation; Neurodevelopment.

scholarly journals The influence of nicotine in healing of small bowel anastomoses in rats: angiogenesis and miofibroblasts

2016 ◽  
Vol 43 (2) ◽  
pp. 87-92 ◽  
Author(s):  
James Skinovsky ◽  
Osvaldo Malafaia ◽  
Mauricio Chibata ◽  
Fernanda Tsumanuma ◽  
Flávio Panegalli Filho ◽  
...  
Keyword(s):  
Small Bowel ◽  
Blood Vessels ◽  
Immunohistochemical Staining ◽  
Wistar Rats ◽  
Time Interval ◽  
Time Intervals ◽  
Duodenojejunal Flexure ◽  
Smooth Muscle Alpha Actin ◽  
Alpha Actin ◽  
And Control

ABSTRACT Objective: to know the effect of nicotine on angiogenesis and myofibroblast formation in anastomoses of the small bowel of rats. Methods: we randomly divided 60 Wistar rats into the groups Nicotine (N) and control (C), according to the proposed treatment. Each group was subdivided into three subgroups according to the time interval used for the evaluation (7, 14 or 28 days). The N group with 30 animals received nicotine subcutaneously at a dose of 2mg/kg body weight, diluted in 0.3ml of 0.9% saline, twice daily for 28 days prior to the operation, and for more 7, 14 or 28 days, depending on the subgroup. The C group (also 30 animals) received only saline on the same conditions and time intervals. After 28 days we carried out an end-to-end anastomosis 10cm distal to the duodenojejunal flexure in each rat. After 7, 14 or 28 days after surgery, we euthanized ten animals of each group, sent specimens of the anastomosis areas, 1cm proximal to 1cm distal, to counting of blood vessels and myofibroblasts through immunohistochemical staining by the application of monoclonal anti-factor VIII antibodies and anti-smooth muscle alpha-actin. Results: the administration of nicotine led to the decrease in the number of blood vessels measured on the 28th postoperative day and the number of myofibroblasts measured on the seventh day following completion of the anastomoses. Conclusion: administration of nicotine was deleterious on angiogenesis and myofibroblast formation in rats' small intestine anastomoses.

scholarly journals Gestational and neurodevelopmental effects of black mustard seeds’ (Brassica nigra) extract in wistar rats

1970 ◽  
Vol 8 (1) ◽  
pp. 1420-1430
Author(s):  
Bernard Ufuoma Enaibe ◽  
Tolulope Timothy Arogundade ◽  
Oluwaseun Adigun ◽  
Foyeke Munirat Adigun ◽  
Emmanuel Olusola Yawson
Keyword(s):  
Body Weight ◽  
Wistar Rats ◽  
Treated Group ◽  
Brassica Nigra ◽  
Female Rats ◽  
Rat Pups ◽  
Group A ◽  
Black Mustard ◽  
Group B ◽  
Mustard Seeds

This study investigated the effect of the crude aqueous extract of Brassica nigra (Black Mustard Seeds) in gestation and on the prefrontal cortex of newborn Wistar rats at different doses following prenatal administration. Eighteen (18) adult female rats weighing an average of 180±10g were used. The female rats were split into 3 groups of six animals; Group A received distilled water throughout gestation, Group B received 200 mg/kg body weight of extract throughout gestation, and Group C received 100 mg/kg body weight of extract throughout gestation). Rat pups from the experimental groups were sacrificed on postnatal days 1, 7, 14, 21, 28, and 35 and subsequently prepared through routine histological and histochemical procedures. Brassica nigra was abortifacient at 200 mg/kg body weight and reduced litter size at 100 mg/kg body weight. No observed physical deformities in pups of treated groups. Comparative prefrontal microarchitecture revealed little to no alteration in the treated group. This study concludes that Brassica nigra (black mustard) is not totally innocuous and as such, should be moderately consumed or totally avoided in pregnancy.Keywords: Brassica nigra; Mustard seeds; Gestation; Neurodevelopment.

Dose-dependent and time-dependent metabolic, hemodynamic, and redox disturbances in dexamethasone-treated Wistar rats

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Elvine P. Nguelefack-Mbuyo ◽  
Fernande P. Peyembouo ◽  
Christian K. Fofié ◽  
Télesphore B. Nguelefack
Keyword(s):  
Insulin Resistance ◽  
Body Weight ◽  
Catalase Activity ◽  
Wistar Rats ◽  
Chronic Treatment ◽  
Body Weight Loss ◽  
Redox Status ◽  
Duration Of Treatment ◽  
Renal Hypertrophy ◽  
Subchronic Treatment

Abstract Objectives Dexamethasone is used experimentally to induce insulin resistance and type 2 diabetes. However, data concerning the dose, the duration of treatment, and the associated comorbidities are inconsistent. The aim of this study was to compare the effects of different doses of dexamethasone and the duration of treatment necessary for the development of a model of insulin resistance that mimics the clinical condition with the associated comorbidities. Methods Dexamethasone was administered intramuscularly to male Wistar rats, at doses of 500 and 1,000 µg/kg/day for the subchronic treatment (eight consecutive days) and at doses of 5, 25, 50, and 100 µg/kg/day in chronic treatment (28 consecutive days). Effects on body weight, metabolism, hemodynamics, renal function, and redox status were evaluated. Results Both treatments induced a progressive body weight loss that was drastic in subchronic treatment, improved glucose tolerance without affecting fasting glycemia. Doses of 1,000 and 100 µg/kg were associated with hypertriglyceridemia, hypertension, and increased heart rate, cardiac and renal hypertrophy. Increased creatinemia associated with reduced creatinuria were observed in sub-chronic treatment while increased proteinuria and reduced creatinuria were noticed in chronic treatment. 1,000 µg/kg dexamethasone caused an increase in hepatic, and renal malondialdehyde (MDA) and glutathione (GSH) coupled with a reduction in catalase activity. The dose of 100 µg/kg induced a rise in GSH and catalase activity but reduced MDA levels in the kidney. Conclusions Doses of 1,000 µg/kg for subchronic and 100 µg/kg for chronic treatment exhibited similar effects and are the best doses to respective time frames to induce the model.

scholarly journals Concurrent Prebiotic Intake Reverses Insulin Resistance Induced by Early-Life Pulsed Antibiotic in Rats

Biomedicines ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 66 ◽  
Author(s):  
Teja Klancic ◽  
Isabelle Laforest-Lapointe ◽  
Jolene Wong ◽  
Ashley Choo ◽  
Jodi E. Nettleton ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Body Weight ◽  
Fat Mass ◽  
Acute Infection ◽  
Female Rats ◽  
Hepatic Expression ◽  
Rat Pups ◽  
Male And Female Rats ◽  
Insulin Receptor Substrates ◽  
Junction Proteins

Pulsed antibiotic treatment (PAT) early in life increases risk of obesity. Prebiotics can reduce fat mass and improve metabolic health. We examined if co-administering prebiotic with PAT reduces obesity risk in rat pups weaned onto a high fat/sucrose diet. Pups were randomized to (1) control [CTR], (2) antibiotic [ABT] (azithromycin), (3) prebiotic [PRE] (10% oligofructose (OFS)), (4) antibiotic + prebiotic [ABT + PRE]. Pulses of antibiotics/prebiotics were administered at d19–21, d28–30 and d37–39. Male and female rats given antibiotics (ABT) had higher body weight than all other groups at 10 wk of age. The PAT phenotype was stronger in ABT males than females, where increased fat mass, hyperinsulinemia and insulin resistance were present and all reversible with prebiotics. Reduced hypothalamic and hepatic expression of insulin receptor substrates and ileal tight junction proteins was seen in males only, explaining their greater insulin resistance. In females, insulin resistance was improved with prebiotics and normalized to lean control. ABT reduced Lactobacillaceae and increased Bacteroidaceae in both sexes. Using a therapeutic dose of an antibiotic commonly used for acute infection in children, PAT increased body weight and impaired insulin production and insulin sensitivity. The effects were reversed with prebiotic co-administration in a sex-specific manner.

Nephrotoxicity of Cyclosporin a and Contrast Media

1989 ◽  
Vol 30 (6) ◽  
pp. 647-653 ◽  
Author(s):  
H. S. Thomsen ◽  
S. Larsen ◽  
P. Skaarup ◽  
L. Hemmingsen ◽  
H. Dieperink ◽  
...  
Keyword(s):  
Body Weight ◽  
Contrast Media ◽  
Light Microscopy ◽  
Cyclosporin A ◽  
Contrast Medium ◽  
Intravenous Injection ◽  
Wistar Rats ◽  
Peroral Administration ◽  
Albumin Excretion

Urine profiles (albumin, glucose, NAG, LDH, GGT and sodium) were followed for 22 h or 8 days after intravenous injection of diatrizoate, iohexol or saline in 30 adult Wistar rats in which nephrotoxicity was induced by daily peroral administration of 25 mg/kg body weight cyclosporin A over a 14-day period. Another 10 rats which had the vehicle of the cyclosporin A solution (placebo) and saline injected intravenously served as controls. The effect of iohexol and saline on the albumin excretion was similar, whereas diatrizoate increased it significantly. Both contrast media caused significantly increased excretion of all three enzymes. The contrast media had no effect on the excretion of glucose and sodium. Except for the fact that the excretion of NAG was significantly higher following iohexol than following diatrizoate 24 to 46 h after injection no significant differences between the two media were found from 24 h after injection among the rats given cyclosporin A. No contrast medium related changes were found by light microscopy of the kidneys. Neither iohexol nor diatrizoate potentiate acute cyclosporin A nephrotoxcity.

scholarly journals Regression of gestational diabetes induced cardiomegaly in offspring of diabetic rat

2009 ◽  
Vol 24 (4) ◽  
pp. 251-255 ◽  
Author(s):  
Honório Sampaio Menezes ◽  
Cláudio Galeano Zettler ◽  
Alice Calone ◽  
Jackson Borges Corrêa ◽  
Carla Bartuscheck ◽  
...  
Keyword(s):  
Body Weight ◽  
Wistar Rats ◽  
Weight Ratio ◽  
Diabetic Rats ◽  
Heart Weight ◽  
Diabetic Rat ◽  
Control Group ◽  
Computer Assisted ◽  
Significant Difference ◽  
Levene Test

PURPOSE: To compare body weight and length, heart weight and length, heart-to-body weight ratio, glycemia, and morphometric cellular data of offspring of diabetic rats (ODR) and of normal rats (control). METHODS: Diabetes was induced in 3 pregnant Wistar rats, bearing 30 rats, on the 11th day after conception by intraperitoneal injection of 50 mg/kg of streptozotocin. Six normal pregnant Wistar rats, bearing 50 rats, made up the control group. Morphometric data were obtained using a scale for the weight, length, heart and body measurements. Morphometric cellular data were obtained by a computer assisted method applied to the measurements of myocytes. Statistical analysis utilized Student's t-test, ANOVA and Levene test. RESULTS: Control offspring had greater mean body weight and length than offspring of diabetic rats (p < 0.001). Heart weight and length and heart-to-body ratios of newborn rats differed between groups at birth (p < 0.001), but showed no difference at 21 days. Mean nuclei area and perimetric value of the myocytes decrees throughout the first 21 days of life (p < 0.01) in the diabetic group. CONCLUSIONS: Heart hypertrophy on the offspring of diabetic rats at birth was demonstrated by the significant difference between the groups. After the eleventh day, no difference was found, which confirmed regression of cardiomegaly. The significant difference between the first and the 21th day of life, for nuclei area feature, demonstrate regression of cardiac hypertrophy in the offspring of diabetic rats.

scholarly journals Effects of proportional high-protein/low-carbohydrate formulated diet consumption in diabetic rats: Beneficial impact on glycemic and weight control

2020 ◽  
Vol 20 (07) ◽  
pp. 16984-16996
Author(s):  
MMC Anyakudo ◽  
◽  
DO Adeniji ◽  
Keyword(s):  
Body Weight ◽  
Wistar Rats ◽  
Treated Group ◽  
Morphological Features ◽  
High Protein ◽  
Control Group ◽  
Formulated Diet ◽  
Low Carbohydrate ◽  
Male Wistar Rats ◽  
And Control

The metabolic response to nutrient ingestion and the rate of digestion and absorption of nutrient molecules in bowel physiology plays an important role in the metabolic control of some human chronic non-infectious diseases. This experimentally-controlled designed nutritional study which lasted eight weeks aimed to determine the effects of proportional high-protein/low-carbohydrate (HP/LC) formulated diet on glycemic tolerance, glycemic control, body weight, organ weight and organ morphometry in healthy and diabetic adult male Wistar rats. Twenty-four male Wistar rats purchased from a disease-free stock were randomly categorized into four groups (n = 6, each) after two weeks acclimatization period in raised stainless steel cages with 6 mm2mesh floor and replaceable numbered blotters papers placed under each cage in a well-ventilated animal house. Animal groups include: Healthy control group (HC), Healthy treated group (HT), Diabetic control group (DC) and Diabetic treated group (DT. The animals were fed according to the experimental design with water ad libitumfor eight weeks. Diabetes was inducted with freshly prepared alloxan monohydrate solution (150 mg/kg bw, intraperitoneally). Body weights and fasting blood sugar concentrations were measured twice weekly, while oral glucose tolerance test was conducted on the last day of the eighth-week study and subsequently followed by organs extraction after anesthesia for weight and gross assessment. Proportional high-protein/low-carbohydrate formulated diet caused significant reduction in mean body weight of treated diabetic (DT: 22.6%; P= .001) and healthy (HT: 5.8%; P= .007) rats while the control animals on control diet recorded significant (P< .05) increase in body weight gain (DC: 12.4%; HC: 11.2%). Glycemic tolerance and control improved significantly in diabetic treated rats over that of the healthy treated rats. Gross morphometry of the extracted organs (kidneys, liver, heart, lungs, spleen and testes) revealed sustained normal morphological features without any visible lesion. In conclusion, consumption of proportional high-protein/low-carbohydrate formulated diet enhanced body weight reduction and sustained normal organ morphological features with good glycemic tolerance and control in experimental rats, suggesting its dietary potentiality, safety and suitability to ameliorate obesity-related diabetes.

scholarly journals Effects of aqueous leaf extract of Corchorus olitorius on the testis and blood testosterone level of adult Wistar rats

2021 ◽  
Vol 10 (2) ◽  
pp. 024-030
Author(s):  
Godwin Chinedu Uloneme ◽  
Demian Nnabuihe Ezejindu ◽  
Darlington Cyprian Akukwu ◽  
Amadi Chibundu Chiekezie
Keyword(s):  
Body Weight ◽  
Wistar Rats ◽  
Day Treatment ◽  
Control Group ◽  
Corchorus Olitorius ◽  
Group A ◽  
Normal Rat ◽  
Group B ◽  
Calcium Iron ◽  
Group D

Background: The extract of Corchorus olitorius has a reasonable content of vitamins A and C, calcium, iron and fibre, and therefore enjoys a universal application in the treatment of some disease conditions, even as the whole leaf is a very important component of food in so many cultures. Purpose: The study was designed to investigate the effect of Corchorus olitorius extracts on the testis of adult Wistar rats. Method: A total number of thirty two adult Wistar rats weighing between 180 and 200 grammes separated into four groups labeled A,B,C and D respectively were used for the study. Animals in group A which served as the control group were fed with the normal rat chow and water only. The group B rats were administered 100mg/kg body weight of aqueous extract of Corchorus olitorus; while those in group C were administered 500mg/kg body weight of the extract. The group D rats received 1000mg/kg body weight of the extract. For a period of four weeks, the different experimental animal groups received the respective aforementioned treatments once daily, around nine- o’clock in the morning through oral intubation. At the end of the 28 day treatment, the animals were sacrificed and the testes harvested for histological, investigation, and through cardiac puncture, blood samples for some hormonal studies was also collected and investigated using standard laboratory standards. Results: Observations made showed that the extract produced no histological distortions, degenerative or defective effects on the testicular tissues. The testosterone levels of group B, C, and D rats were observed to be significantly higher (P<0.005) than that of the group A (control group).ound: The extract of Corchorus olitorius has a reasonable content of vitamins A and C, calcium, iron and fibre, and therefore enjoys a universal application in the treatment of some disease conditions, even as the whole leaf is a very important component of food in so many cultures. Purpose: The study was designed to investigate the effect of Corchorus olitorius extracts on the testis of adult Wistar rats. Method: A total number of thirty two adult Wistar rats weighing between 180 and 200 grammes separated into four groups labeled A,B,C and D respectively were used for the study. Animals in group A which served as the control group were fed with the normal rat chow and water only. The group B rats were administered 100mg/kg body weight of aqueous extract of Corchorus olitorus; while those in group C were administered 500mg/kg body weight of the extract. The group D rats received 1000mg/kg body weight of the extract. For a period of four weeks, the different experimental animal groups received the respective aforementioned treatments once daily, around nine- o’clock in the morning through oral intubation. At the end of the 28 day treatment, the animals were sacrificed and the testes harvested for histological, investigation, and through cardiac puncture, blood samples for some hormonal studies was also collected and investigated using standard laboratory standards. Results: Observations made showed that the extract produced no histological distortions, degenerative or defective effects on the testicular tissues. The testosterone levels of group B, C, and D rats were observed to be significantly higher (P<0.005) than that of the group A (control group).

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