Scavenger Effect of Elastase on Calcifications in Liver, Kidney and Central Nervous System Tissues of Rabbits with Atherosclerosis Induced by Cholesterol-Rich Diet

1989 ◽  
Vol 17 (4) ◽  
pp. 350-357 ◽  
Author(s):  
M. Yasui ◽  
I. Yano ◽  
K. Ota ◽  
A. Oshima
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Serum Lipids ◽  
Dietary Cholesterol ◽  
Inhibitory Effect ◽  
Standard Diet ◽  
Lipid Levels ◽  
Atherosclerotic Lesions ◽  
The Central Nervous System ◽  
Tissue Calcium

The inhibitory effect of elastase on calcification in liver, kidney and the central nervous system (CNS) was studied in rabbits with atherosclerosis induced by a cholesterol-rich diet. A total of 25 male rabbits were divided into six groups. In the first three groups, rabbits received a standard diet, a 1.5% cholesterol-rich diet or a 1.5% cholesterol-rich diet with intraperitoneal elastase (450 IU/kg·day) for 3 months. In the second three groups, rabbits received a standard diet, a 0.67% cholesterol-rich diet or a 0.67% cholesterol-rich diet with intraperitoneal elastase (450 IU/kg day) for 6 months. Tissue calcium levels were then determined by neutron activation analysis. Tissue lipid levels were also measured. Dietary cholesterol increased serum lipid levels, atherosclerotic lesions and calcium levels in the CNS, but not in the liver or kidney. Calcium levels in the cerebellum and spinal cord of rabbits receiving the 0.67% cholesterol-rich diet plus elastase were significantly lower than those of rabbits receiving the 0.67% cholesterol diet alone. Elastase had a gradual inhibitory effect on the increase in calcium levels in CNS of cholesterol-induced atherosclerotic rabbits, reduced the increase in serum lipids and decreased the incidence of atherosclerotic lesions.

β-Neoendorphin inhibits thyrotrophin secretion in rats

1983 ◽  
Vol 104 (4) ◽  
pp. 437-442 ◽  
Author(s):  
Terunori Mitsuma ◽  
Tsuyoshi Nogimori
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Plasma Concentrations ◽  
Inhibitory Effect ◽  
Thyrotrophin Releasing Hormone ◽  
Specific Radioimmunoassay ◽  
Tsh Secretion ◽  
Pretreated Group ◽  
The Central Nervous System ◽  
Tsh Levels

Abstract. The effects of β-neoendorphin on thyrotrophin-releasing hormone (TRH) and thyrotrophin (TSH) secretion in rats were studied. β-neoendorphin (500 μg/kg) was injected iv, and the rats were decapitated serially. TRH, TSH, thyroxine (T4) and 3,3',5-triiodothyronine (T3) were measured by means of a specific radioimmunoassay for each. Hypothalamic immunoreactive TRH (ir-TRH) content increased significantly after β-neoendorphin injection, and plasma concentrations tended to decrease, but not significantly so. Plasma TSH levels decreased significantly in a dose-related manner with a nadir at 40 min. Plasma T4 and T3 levels did not change after the injection. Plasma ir-TRH and TSH responses to cold were significantly inhibited by β-neoendorphin, but the plasma TSH response to TRH was not. Naloxone partially prevented the inhibitory effect of β-neoendorphin on TSH release. In the haloperidol- or 5-hydroxytryptophan-pretreated group, the inhibitory effect of β-neoendorphin on TSH release was prevented, but not in the l-dopa- or para-chlorophenylalanine-pretreated group. These drugs alone did not affect plasma TSH levels at the dose used. These findings suggest that β-neoendorphin acts on the hypothalamus by inhibiting TRH release, which may be modified by amines of the central nervous system.

Effects of Nicergoline on Calcium and Magnesium Deposition in the Central Nervous System Tissues of Rats Maintained on Low-Calcium Diets

1992 ◽  
Vol 20 (6) ◽  
pp. 483-491 ◽  
Author(s):  
M Yasui ◽  
T Kihira ◽  
M Tsujimoto ◽  
K Ota
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Soft Tissues ◽  
Cerebral Metabolism ◽  
Calcium Deposition ◽  
Standard Diet ◽  
Low Calcium Diet ◽  
Low Calcium ◽  
The Central Nervous System ◽  
Calcium And Magnesium

Reduction of calcium intake leads to the mobilization of calcium and magnesium from the bone pool and to calcium deposition in the soft tissues, especially in the central nervous system (CNS). The effects of 10α-methoxy-1,6-dimethylergoline-8β-methanol 5-bromonicotinate (nicergoline), an ameliorator of cerebral circulation and metabolism, on the deposition of calcium and magnesium in the CNS, heart, liver, kidney, muscle, abdominal aorta and bones were studied in rats maintained on standard and low-calcium diets. Rats were fed the following diets for 90 days: standard calcium (12.5 g/kg); standard calcium with 60 mg/kg nicergoline; low-calcium (30 mg/kg); and low-calcium with 60 mg/kg nicergoline. The presence of nicergoline did not affect blood chemistry but magnesium concentrations in the liver were significantly (P < 0.05) higher in rats fed standard diet with nicergoline. Magnesium concentrations in the occipital cortex, pons, cerebellum, liver, kidney, muscle and femur of nicergoline-treated rats fed low-calcium diet were significantly ( P < 0.01 − 0.05) higher compared with those in the corresponding controls, whereas the calcium concentrations in the femur of nicergoline-treated rats fed both standard and low-calcium diets were significantly ( P < 0.05) higher than those in the corresponding controls. In general, nicergoline tended to preserve the calcium content in the bone of rats fed a standard diet. Nicergoline may be implicated in calcium metabolism in rats fed low-calcium diets and may activate cerebral metabolism through the maintenance of magnesium concentrations in the CNS and soft tissues.

Direct Inhibitory Effect of Fluoxetine on N-Methyl-D-Aspartate Receptors in the Central Nervous System

2007 ◽  
Vol 62 (11) ◽  
pp. 1303-1309 ◽  
Author(s):  
Bernadett K. Szasz ◽  
Arpad Mike ◽  
Robert Karoly ◽  
Zoltan Gerevich ◽  
Peter Illes ◽  
...  
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Inhibitory Effect ◽  
Direct Inhibitory Effect ◽  
The Central Nervous System

Transient Blindness following Hysteroscopy

2003 ◽  
Vol 31 (2) ◽  
pp. 152-155 ◽  
Author(s):  
A Karci ◽  
Y Erkin
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Adverse Effects ◽  
Inhibitory Effect ◽  
Retinal Cells ◽  
Hysteroscopic Myomectomy ◽  
Endoscopic Procedures ◽  
The Central Nervous System ◽  
Irrigation Solution

The potential adverse effects resulting from absorption of irrigation fluids during endoscopic procedures are well documented. Glycine, which is commonly used as an irrigation solution, has an inhibitory effect both on the central nervous system and on the retinal cells. We report the case of a woman who developed transient blindness following hysteroscopic myomectomy in which glycine was used as the irrigation solution.

scholarly journals An Assessment of the Effects of Azodicarbonamide-containing Diet on Neurobehaviour, Brain Antioxidant Status and Membrane Lipid Peroxidation Status in Rats

2020 ◽  
Vol 20 (1) ◽  
pp. 49-57
Author(s):  
Anthony T. Olofinnade ◽  
Adegboyega Adeyeba ◽  
Adejoke Y. Onaolapo ◽  
Olakunle J. Onaolapo
Keyword(s):  
Lipid Peroxidation ◽  
Central Nervous System ◽  
Nervous System ◽  
Food Intake ◽  
Antioxidant Status ◽  
Membrane Lipid ◽  
Standard Diet ◽  
Adult Rats ◽  
Y Maze ◽  
The Central Nervous System

Background: Azodicarbonamide is a dough-enhancer used in the process of breadmaking in countries like Nigeria. While there have been suggestions that it is a sensitizer of the respiratory system, there is a dearth of information on its effects on the central nervous system. Aim: This study assessed the effects of azodicarbonamide on the central nervous system (ADA) in rats. Objective: The effects of ADA-containing diet on neurobehaviour, brain antioxidant status, and neuromorphology of selected brain regions in rats were examined. Method: Forty adult rats were randomly-assigned into four groups of ten rats each, and were given standard diet or diet containing ADA at 1, 2 and 4% respectively. Rats were fed a standard diet or ADA-containing diet for a period of 28 days. Weekly body weight assessment and daily estimation of food intake were done. Behavioural tests in the Open field, Y-maze, radial-arm maze, and Elevated Plus Maze (EPM) were conducted on day 29. Twenty-four hours after the last behavioural test, animals were euthanised, whole brains were dissected, weighed, and either homogenised for assessment of lipid peroxidation and antioxidant status; or sectioned and processed for general histology. Results : Consumption of ADA-containing diet was associated with a significant decrease in weight gain/food intake, and significant suppression of horizontal locomotion and rearing behaviours; however, grooming activity increased significantly. Also, there was a significant reduction of open-arm time in the EPM and a significant increase in Y-maze alternation (at the lowest concentration of ADA). ADA-containing diet was not associated with significant changes in brain oxidative status or neuromorphology. Conclusion: The study showed that while ADA-containing diet may alter neurobehaviour in rats; this was not associated with evidence of brain oxidative stress or neuro-histomorphological alterations.

Dynorphin (1–13) effects on thyrotrophin-releasing hormone and thyrotrophin secretion in rats

1983 ◽  
Vol 103 (3) ◽  
pp. 359-364 ◽  
Author(s):  
Terunori Mitsuma ◽  
Tsuyoshi Nogimori
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Inhibitory Effect ◽  
Thyrotrophin Releasing Hormone ◽  
Releasing Hormone ◽  
Tsh Secretion ◽  
Pretreated Group ◽  
Basal Plasma ◽  
The Central Nervous System ◽  
Tsh Levels

Abstract. The effects of dynorphin (1-13) on thyrotrophin-releasing hormone (TRH) and thyrotrophin (TSH) secretion in rats were studied. Dynorphin (500 μg/kg) was injected iv, and the rats were serially decapitated. TRH and TSH, thyroxine (T4) and 3,3',5-triiodothyronine (T3) were measured by radioimmunoassay. The hypothalamic immunoreactive TRH did not change significantly after dynorphin injection. Basal plasma TSH levels significantly decreased in a dose-related manner with a nadir at 40 min after dynorphin injection. The effect of dynorphin on TSH release was partially prevented by naloxone. The plasma TSH response to cold was significantly inhibited by dynorphin. The plasma TSH response to TRH did not differ from that of the control. In the l-DOPA or 5-hydrotryptophan-pretreated group, the inhibitory effect of dynorphin on TSH release was prevented, but not in the haloperidolor para-chlorophenylalanine-pretreated group. These drugs alone did not affect plasma TSH levels. The plasma T4 and T3 levels did not change significantly after dynorphin injection. The findings suggest that dynorphin acts on the hypothalamus by inhibiting TRH release, which may be modified by amines of the central nervous system.

Effects of Hyperoxia on Lung Utrastructure

1970 ◽  
Vol 28 ◽  
pp. 26-27
Author(s):  
Gladys Harrison
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Light Microscopy ◽  
Oxygen Effects ◽  
Age Dependent ◽  
The Central Nervous System ◽  
The Subject ◽  
Space Age ◽  
Alveolar Septa ◽  
Extensive Damage

With the advent of the space age and the need to determine the requirements for a space cabin atmosphere, oxygen effects came into increased importance, even though these effects have been the subject of continuous research for many years. In fact, Priestly initiated oxygen research when in 1775 he published his results of isolating oxygen and described the effects of breathing it on himself and two mice, the only creatures to have had the “privilege” of breathing this “pure air”.Early studies had demonstrated the central nervous system effects at pressures above one atmosphere. Light microscopy revealed extensive damage to the lungs at one atmosphere. These changes which included perivascular and peribronchial edema, focal hemorrhage, rupture of the alveolar septa, and widespread edema, resulted in death of the animal in less than one week. The severity of the symptoms differed between species and was age dependent, with young animals being more resistant.

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