hypoglycemia/tyrosine

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Regulation of rat insulin receptor tyrosine kinase by hypoglycemia.

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To investigate the effect of hypoglycemia on the regulation of muscle-derived insulin receptor tyrosine kinase activity, four groups of Sprague-Dawley rats were studied: two groups in which either insulin (4 mU/kg.min) or phloridzin (3 mg/kg.min) was infused to acutely reach hypoglycemia (mean,

Changes in the tyrosine phosphorylation of mitogen-activated protein kinase in the rat hippocampus during and following severe hypoglycemia.

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The changes in the levels of tyrosine-phosphorylated proteins in the cytosolic fraction of the rat hippocampus subjected to severe hypoglycemia were analyzed. A marked increase in tyrosine phosphorylation of a 43-kDa protein was observed at 30 min of isoelectric EEG and 30 min and 1 h of recovery.

Regional heterogeneity of L-[3-(3)H]tyrosine incorporation into rat brain proteins during severe hypoglycemia.

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Regional protein synthesis was investigated during severe, insulin-induced hypoglycemia in anesthetized, artificially ventilated rats. Three minutes after the cessation of spontaneous EEG activity, animals received a single injection of L-[3H]tyrosine and were killed 30 min later. Autoradiographs

Effects of repetitive hypoglycemia on neuroendocrine response and brain tyrosine hydroxylase activity in the rat.

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Hypoglycemia-associated autonomic failure (HAAF) is a syndrome of acute adaptation to a metabolic stressor, in which neuroendocrine responses to repetitive hypoglycemic bouts are blunted. The CNS mechanisms that contribute to HAAF are unknown. In the present study, we modeled HAAF in the rat and

Neonatal stress: effects of hypoglycemia and hypoxia on adrenal tyrosine hydroxylase gene expression.

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Catecholamines (CA) are released from and resynthesized in the adrenal medulla in response to stress. In the mature animal, stimulus-secretion-synthesis coupling occurs through transsynaptic (neuronal) activity. In contrast, in the immature animal, before functional adrenal innervation, certain

Short- and long-term changes in adrenal tyrosine hydroxylase activity during insulin-induced hypoglycemia and cold stress.

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Insulin-induced hypoglycemia increases the capacity for catecholamine biosynthesis in the rat adrenal medulla by two temporally distinct processes: a rapid increase in the affinity of tyrosine hydroxylase (TH) for cofactor and a more gradual increase in the maximal TH activity. Cold exposure leads

The Effects of Insulin-Induced Hypoglycaemia on Tyrosine Hydroxylase Phosphorylation in Rat Brain and Adrenal Gland.

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In this study we investigated the effects of insulin-induced hypoglycaemia on tyrosine hydroxylase (TH) protein and TH phosphorylation in the adrenal gland, C1 cell group, locus coeruleus (LC) and midbrain dopaminergic cell groups that are thought to play a role in response to hypoglycaemia and

Life-threatening hypoglycemia induced by a tyrosine kinase inhibitor in a patient with neuroendocrine tumor: a case report.

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We describe a case of a patient who was confronted with two life-threatening conditions: extensive neuroendocrine tumor and hypoglycemia induced by sunitinib administration, as an anti-neoplastic agent. Administration of small dose of prednisolone could prevent severe hypoglycemia and improve

Deficiency of an enzyme of tyrosine metabolism underlies altered gene expression in newborn liver of lethal albino mice.

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Mice homozygous for albino deletions encompassing the locus alf/hsdr-1 die shortly after birth. Lethality is thought to be the consequence of hypoglycemia, which results from the failure to activate hormone-dependent genes in liver and kidney encoding enzymes important for gluconeogenesis. Within

Tyrosine kinase inhibitor imatinib modulates the viability and apoptosis of castrate-resistant prostate cancer cells dependently on the glycolytic environment.

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The tyrosine kinase inhibitor imatinib has been used in prostate cancer treatment with outcomes that did not follow the in vitro findings. The glycolytic environment has been shown to influence the efficacy of anti-cancer drugs. This study aimed to evaluate the effect of imatinib on

Dasatinib-induced hypoglycemia in a patient with acute lymphoblastic leukemia

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Tyrosine kinase inhibitors can cause significant hypoglycemia in patients with diabetes on other antihyperglycemic medications. These patients should be monitored, and their medications adjusted accordingly. Keywords: acute

Modifications of rat liver glucocorticoid receptor by insulin-induced hypoglycemia.

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Stability-, equilibrium- and kinetic binding parameters, transformation rate and sedimentation properties of liver cytosol glucocorticoid receptor from insulin-treated rats were studied. 40% elevation of cytosolic glucocorticoid binding and a lower affinity of the receptor for ligand were observed

Severe hypoglycemia due to possible interaction between glibenclamide and sorafenib in a patient with hepatocellular carcinoma.

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There is increasing evidence that tyrosine kinase inhibitors (TKIs) have significant blood glucose lowering effects. A 70-year old Caucasian male with liver cirrhosis Child-Pugh A, advanced hepatocellular carcinoma and diabetes had a stable glycemic control being treated with glibenclamide (3.5 mg

Regionally selective inhibition of cerebral protein synthesis in the rat during hypoglycemia and recovery.

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Regional cerebral protein synthesis was investigated in anesthetized, mechanically ventilated rats during progressive insulin-induced hypoglycemia and the recovery period following glucose infusion. Polysome profiles from precomatose animals with slow wave/polyspike EEG revealed a slight reduction

Effects of insulin treatment without and with recurrent hypoglycemia on hypoglycemic counterregulation and adrenal catecholamine-synthesizing enzymes in diabetic rats.

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Untreated diabetic rats show impaired counterregulation against hypoglycemia. The blunted epinephrine responses are associated with reduced adrenomedullary tyrosine hydroxylase (TH) mRNA levels. Recurrent hypoglycemia further impairs epinephrine counterregulation and is also associated with reduced

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