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[Inherited metabolic aberration of phenylalanine in the family members of patients with essential hypertension and stroke].

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L-2H-Leu, L-2H-Val, L-2H-Ile, L-2H-Phe, 14N-Lys were chosen for comparing their metabolic kinetic variables among those with prominent genetic predisposition of essential hypertension (FH*, 10 subjects), of stroke (FS*, 12 subjects) and those without (F-, 12 subjects) groups by gas

Efficacy of 3,5-dibromo-L-phenylalanine in rat models of stroke, seizures and sensorimotor gating deficit.

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OBJECTIVE Abnormal glutamatergic activity is implicated in neurologic and neuropsychiatric disorders. Selective glutamate receptor antagonists were highly effective in animal models of stroke and seizures but failed in further clinical development because of serious side effects, including an almost

Serum Phenylalanine, Tyrosine, and their Ratio in Acute Ischemic Stroke: on the Trail of a Biomarker?

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Fast diagnosis and appropriate treatment are of utmost importance to improving the outcome in patients with acute ischemic stroke (AIS). A rapid and sensitive blood test for ischemic stroke is required. The aim of this study was to examine the usefulness of phenylalanine (PHE) and tyrosine (TYR) as

Neuroprotective action of halogenated derivatives of L-phenylalanine.

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OBJECTIVE The aromatic amino acid L-Phenylalanine (L-Phe) significantly and reversibly depresses excitatory glutamatergic synaptic transmission (GST) via a unique set of presynaptic and postsynaptic mechanisms. Therefore, we hypothesized that endogenous derivatives of L-Phe, which display potent

Inherited disturbances of phenylalanine metabolic kinetics in essential hypertension.

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OBJECTIVE To clarify whether the disturbances in metabolic kinetics of the essential aminoacid, phenylalanine (phe), are implicated in the genetic pathogenesis of essential hypertension (EH). METHODS 1. L-(2, 3D3)-leucine, L-(2, 3D3)-isoleucine, L-15N-lysine, L-(2, 3D3)-valine and L-(2, 3D3)-phe

Dysfunction of choline transport system through blood-brain barrier in stroke-prone spontaneously hypertensive rats.

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The blood-brain barrier (BBB) transport of choline was compared between stroke-prone spontaneously hypertensive rats (SHRSP) and normotensive Wistar KY rats (WKY). The permeability surface area product (PS) of [3H]choline through the BBB in SHRSP (3.03 X 10(-3) +/- 1.09 X 10(-3) ml/min/g brain) was

Discriminating poststroke depression from stroke by nuclear magnetic resonance spectroscopy-based metabonomic analysis.

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Poststroke depression (PSD), the most common psychiatric disease that stroke survivors face, is estimated to affect ~30% of poststroke patients. However, there are still no objective methods to diagnose PSD. In this study, to explore the differential metabolites in the urine of PSD subjects and to

Acute ischemic stroke : polymorphonuclear leukocyte membrane fluidity and cytosolic Ca(2+) concentration at baseline and after chemotactic activation.

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OBJECTIVE Several reports have considered the role of systemic leukocytes in acute ischemic stroke (AIS). Initially, greater attention was focused on the leukocyte count and subsequently on their adhesiveness, aggregation, rheology, and activation. The aim of this study was the evaluation of certain

Changes in phagocyte activity in patients with ischaemic stroke.

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The activity of peripheral phagocytes to generate reactive oxygen species (ROS) was studied in healthy individuals and patients with ischaemic stroke. The aim was to clarify the relationship between phagocyte activity, the time elapsed after the onset of disease and stroke severity. The total and

Unaffected arm muscle hypercatabolism in dysphagic subacute stroke patients: the effects of essential amino acid supplementation.

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Alterations in muscle protein turnover of the unaffected side of stroke patients could contribute to physical disability. We investigated whether hypercatabolic activity occurred in unaffected arm muscle and whether supplemented essential amino acids (EAAs) could limit muscle hypercatabolism (MH).

Suppressed neutrophil respiratory burst in patients with haemorrhagic stroke.

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The pathophysiology underlying the high incidence of post-stroke infectious complications has not been fully understood. We measured the respiratory burst of neutrophils as an index of their bactericidal function in patients with haemorrhagic stroke, and we also measured the plasma concentrations of

The effect of six prostaglandins, prostacyclin and iloprost on generation of superoxide anions by human polymorphonuclear leukocytes stimulated by zymosan or formyl-methionyl-leucyl-phenylalanine.

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Prostaglandins (PG) E2,E1,6-keto-E1 and D2 at concentrations of 0.15-0.80 microM inhibited by 25% the generation of superoxide anions (O2-) in human polymorphonuclear leukocytes (PMNs) stimulated with formyl-methionyl-leucyl-phenylalanine (FMLP). The potency of that inhibition by either PGD2 or PGE1

Progressive carotid artery stenosis with a novel tRNA phenylalanine mitochondrial DNA mutation.

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Mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes (MELAS) is a distinct clinical syndrome caused by mutations in the mitochondrial DNA. The pathogenesis of stroke-like episodes remains unknown but major vessels stenosis is not a cause of stroke-like episodes. We

Activation of the kynurenine pathway in the acute phase of stroke and its role in fatigue and depression following stroke.

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Many stroke survivors suffer from poststroke fatigue (PSF) and poststroke depression (PSD), indicating the importance of increasing the base of knowledge about the mechanisms underlying these sequelae. The primary aim of this study was to determine whether activation of the kynurenine (KYN) pathway

Objective diagnosis of post-stroke depression using NMR-based plasma metabonomics.

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Background: Post-stroke depression (PSD) is a frequent and serious complication of stroke. However, the underlying molecular basis of PSD remains largely unknown, and no empirical laboratory tests were available to diagnose this disorder. Materials and methods: A proton nuclear

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