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Query: UMLS:C0011570 (depression)
 172,036 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

After an intravenous glucose load in man, total serum amino acid concentrations are rapidly depressed and remain below baseline values for at least 2 to 3 hr after serum glucose and insulin have returned to preload concentrations. Despite the presence of basal hypoaminoacidemia, a decreased glucose disappearance rate, and hyperinsulinemia in volunteers who were ill with sandfly fever, an intravenous glucose load resulted in a further depression of serum amino acids which was equal to or slightly greater than that observed in the same individuals before exposure to the virus. Although the infectious process may have some effect on insulin-stimulated hepatic disposal of a glucose load, it does not appear to influence the ability on insulin to decrease the rate of release of certain amino acids from skeletal muscle.
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PMID:Effect of glucose infusion on the concentration of individual serum free amino acids during sandfly fever in man. 40 56

12 metabolically healthy subjects were i.v. administered equipotent doses (ED30) of tolbutamide (7.5 mg/kg), glisoxepide (0.02 mg/kg) and glibenclamide (0.006 mg/kg). Prior to and 2, 5, 8, 10, 20, 40, 60 and 120 min after the injection the following serum parameters were determined: blood glucose, immunologically measurable insulin (IMI) with the double-antibody method (Hales and Randle) and proinsulin (IMP) enzymatically (ISP-method). The maximum level of insulin follows the injection of tolbutamide with a value of 70.5 micronU/ml after 2 min, of glisoxepide after 5 min (67.0 micronU/ml) and of glibenclamide after 20 min (32.3 micronU/ml). The proinsulin fraction of the total insulin shows a level of 12.5 micronU/ml before the test. After the administration of the three compounds proinsulin increases, too, but reaches only 20-40% of the total immunoreactive insulin. The amount of secreted insulin and proinsulin during the 120-min test is rather the same for the three substances. The average increase of insulin is nearly identical for tolbutamide and glisoxepide, whereas it is less for glibenclamide. Both the mean blood sugar depression and the highest mean increase of proinsulin is reached after glisoxepide. The significance of the one-chain precursor of insulin as a part of the sulfonylurea stimulated total insulin for glucose depression is discussed.
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PMID:[Insulin and pro-insulin secretion following intravenous administration of tolbutamide, glisoxepide and glibenclamide]. 41 45

These investigations were designed to evaluate the effect of excess glucose and sodium chloride on lipolysis in the isolated adipocyte under normal and modelled pathological conditions simulating the hyperglycemic hyperosmolar syndrome. Isolated rat fat cells were incubated in the presence of various combinations of sodium chloride, glucose, epinephrine, and insulin. Lipolysis was measured as glycerol and free fatty acid release, and total medium osmolarity as milliosmoles per liter by freezing point depression. Basal lipolysis was unaffected by changes in osmolarity with sodium chloride, but glucose and glucose plus sodium chloride increased basal glycerol release. Increasing osmolarity with sodium chloride diminished the lipolytic response to epinephrine. Increasing osmolarity with glucose augmented the lipolytic response to epinephrine up to a total medium osmolarity of 550 mosmol. Higher osmolarities produced with glucose suppressed the epinephrine-induced lipolytic response.When the hyperglycemic hyperosmolar syndrome was simulated with 100 mM glucose and 50 mM sodium chloride (total osmolarity = 460 mosmol) the epinephrine-stimulated lipolysis dose-response curve in the isolated fat cell was shifted to the right. Furthermore, in the presence of 100 mM glucose + 50 mM sodium chloride, physiological concentrations of insulin were less effective in opposing epinephrine-stimulated lipolysis. In the presence of 50 mM glucose and 25 mM sodium chloride (total osmolarity = 370 mosmol) epinephrine-stimulated lipolysis measured as free fatty acid release was decreased by 50%. Under conditions simulating the hyperglycemic hyperosmolar syndrome in the isolated rat adipocyte, altered lipolysis reflects impaired effectiveness of both insulin and epinephrine as antilipolytic and lipolytic hormones, respectively. Furthermore, the attenuated response to both hormones appears to be primarily a function of extracellular solute composition. The lack of ketosis is the result of diminished release of free fatty acids from peripheral adipose cells.
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PMID:Simulated hyperglycemic hyperosmolar syndrome. Impaired insulin and epinephrine effects upon lipolysis in the isolated rat fat cell. 42 61

1,3-Butanediol-1,3-dioctanoate (BDDO), a synthetic source of energy, has been shown to be equal to corn oil when fed to chicks recovering from moderate and severe Newcastle disease virus infections. Body weight increments of chicks fed diets containing 10% BDDO were equal to or greater than those of chicks fed 10% corn oil, both with restricted feeding regimens. Kilocalories of metabolizable energy required to produce 100 g of body weight increment over a basal group was used as a means of quantitating energy demand. BDDO was comparable to corn oil as an energy source with no adverse effects. Liver/body weight ratios were greater in the BDDO-fed chicks. Circadian rhythmicity of liver size and liver glycogen content was demonstrated. Chicks fed BDDO had total liver glycogen content threefold that of the corn oil controls, which was attributed to stimulation of insulin secretion. Catch-up growth in the chick following the growth depression of disease appears to be as well facilitated by a synthetic source as by a natural one.
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PMID:Effect of feeding 1,3-butanediol-1,3-dioctanoate as an energy source for chicks for catch-up growth during recovery from Newcastle disease virus. 43 Feb 49

Insulin-induced hypoglycemia caused depression of rhythmic monosynaptic EPSP motoneurons of the lumbar cord in acute experiments on narcotized and spinal cats. It was demonstrated that growing depression of monosynaptic transmission was associated with the exhaustion of mediator operative fraction and not with any pre- or postsynaptic delay or inhibition over a period of initial hypoglycemia when the sugar content in the blood fell to the level of 50--60 mg%. The function disturbance of postsynaptic formations of monosynaptic reflex arc of spinal cord occured in more advanced hypoglycemia.
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PMID:[Monosynaptic reflexes of the cat spinal cord during the development of insulin hypoglycemia]. 43 22

The authors studied the catecholamine metabolism with an additional use of the function loadings by insulin and adrenalin in 77 epileptic patients who were ill for a long time and had marked disturbances in mental activity. The study was conducted in dynamics. The authors revealed a considerable activation of catecholamine metabolism in patients with acute psychotic states during dysphoria and in periods close to attacks against the background of typical, for the studied group, depression of the sympathoadrenalin system. The differences in the nature of reaction to the functional loadings, changing in various stages of the disease development and reflecting, to some extent, the compensatory possibilities of organism were registered.
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PMID:[Catecholamine metabolism in various compensatory manifestations of epilepsy patients]. 44 1

The effect of fasting, glucose, and glucagon injection on pyruvate metabolism of rat liver mitochondria was studied. Fasting for 24 h caused a) a twofold increase in mitochondrial pyruvate uptake, b) fivefold increase in CO2 fixation, and c) no change in pyruvate decarboxylation. Injection of glucose to fasted rats 2 h prior to preparation suppressed by one-half the increase in mitochondrial pyruvate uptake and CO2 fixation and increased hepatic pyruvate content. Injection of glucagon together with glucose abolished the depression of pyruvate uptake by glucose but did not prevent the decrease in mitochondrial CO2 fixation or hepatic ketone content caused by glucose alone. The effects of insulin injection resembled that of glucose in decreasing hepatic ketone content, but differed by increasing pyruvate uptake without much change in CO2 fixation. It is concluded that the increase in gluconeogenesis induced by fasting is due to an increase in pyruvate uptake and carboxylation by hepatic mitochondria. The latter is due to the increased mobilization and oxidation of fatty acids induced by reciprocal changes in insulin and glucagon.
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PMID:Nutritional and hormonal regulation of pyruvate metabolism in the liver. 44 69

Marked weight loss with cachexia together with severe depression and pain from symmetrical peripheral neuropathy were noted in a 66-year-old man, known to have had diabetes for six years, which required insulin on admission to hospital. The patient died of bronchopneumonia after one year. The severe neuropathy was proven both neurophysiologically and at necropsy. There was no diabetic retinopathy and no histological evidence of renal glomerulosclerosis. There was no evidence of a malignant tumour either clinically or at necropsy.
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PMID:[Diabetic neuropathic cachexia (author's transl)]. 44 96

Bombesin acts within the brain to produce a prompt and sustained hyperglycemia, hyperglucagonemia, and relative or absolute hypoinsulinemia. Bombesin does not decrease plasma glucose turnover. Acute adrenalectomy but not hypophysectomy prevents hyperglycemia and hyperglucagonemia after intracisternal administration of bombesin. Administration of bombesin into the lateral ventricle of awake, unrestrained animals results in elevation of plasma glucose, preceded by a significant increase in plasma epinephrine and no increase in plasma norepinephrine or dopamine. Systemic administration of somatostatin prevents bombesin-induced hyperglycemia and hyperglucagonemia. These data support the conclusion that bombesin acts within the brain to increase sympathetic outflow resulting in increased adrenalmedullary epinephrine secretion, followed by depression of plasma insulin and elevation of plasma glucagon and glucose.
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PMID:Central nervous system action of bombesin: mechanism to induce hyperglycemia. 46 25

The effect of intravenous somatostatin on blood levels of metabolites and hormones has been examined in normal subjects who performed a 30-minute period of bicycle exercises at 70% maximal exercise capacity. The results have been compared with control studies in the same subjects. Measurements were made of blood levels of lactate, glucose, free fatty acids, glycerol, acetoacetate, 3-hydroxybutyrate, insulin, glucagon, growth hormone (hGH) and prolactin. Growth hormone and glucagon release were suppressed during exercise with somatostatin and there was a subsequent elevation during recovery. There was slight post-exercise depression of insulin, but no alteration of plasma prolactin secretion. Blood glucose was reduced during exercise with somatostatin and increased during recovery. The elevation of ketone bodies after exercise was greater in the investigation with somatostatin, but there were no significant changes in other metabolites. Somatostatin, although causing inhibition of hGH release, appeared to have no significant effect upon fatty acid mobilization during exercise.
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PMID:The effect of somatostatin on metabolic and hormonal changes during and after exercise. 47 77


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