tryptamine/hypoxia

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Tryptamine as substrate and inhibitor of lentil seedling copper amine oxidase.

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Copper amine oxidase from lentil seedlings was shown to be able to catalyze the oxidative deamination of the indoleamines tryptamine, 5-hydroxytryptamine, and 5-methoxytryptamine. These compounds showed saturation kinetics with Km values as normal substrates, but their oxidation led to irreversible

Stimulation of breathing movements by L-5-hydroxytryptophan in fetal sheep during normoxia and hypoxia.

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1. In fetal lambs in late gestation, systemic infusion of L-5-hydroxytryptophan (L-5-HTP) during normoxia greatly increases the incidence of fetal breathing movements (FBM) and high-voltage electrocortical activity (HV ECoG). It also induces FBM during HV ECoG and increases blood pressure. To

Pulmonary metabolic function in the awake lamb: effect of development and hypoxia.

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The effect of postnatal development and acute alveolar hypoxia on pulmonary metabolic function was studied in conscious newborn lambs. Measurements of the ability of the lungs of these animals to metabolize [3H]benzoyl-L-phenyl-alanyl-L-alanyl-L-proline ([3H]BPAP; a synthetic substrate for

Tryptamine-induced tryptophanyl-tRNAtrp deficiency in neurodifferentiation and neurodegeneration interplay: progenitor activation with neurite growth terminated in Alzheimer's disease neuronal vesicularization and fragmentation.

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Tryptophanyl-tRNA synthetase (TrpRS) catalyzes tryptophanyl-tRNAtrp formation. At concentrations exceeding tryptophan, tryptamine inhibits TrpRS. This leads in tryptophanyl-tRNA deficiency and synthesis of aberrant proteins. Tryptamine presents in food and crosses blood-brain barrier. The purpose of

Integration of quantitative proteomics and metabolomics reveals tissue hypoxia mechanisms in an ischemic-hypoxic rat model

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Tissues hypoxia caused by hemorrhage is a common complication in many clinical diseases. However, its pathological mechanism remains largely unknown. To partly address this issue, an ischemic-hypoxic rat model was established and the plasma proteomic and metabolic profiles were quantified and

Influence of hypercapnia on rabbit intrapulmonary neuroepithelial bodies: microfluorimetric and morphometric study.

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The present investigation was undertaken to investigate the influence of hypercapnia on intrapulmonary neuroepithelial bodies (NEB). Rabbits were mechanically ventilated with a hypercapnic gas mixture (7% carbon dioxide, 20% oxygen, 73% nitrogen). Lung samples were examined by a

Endogenous toxins and mycotoxins in forage grasses and their effects on livestock.

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Plant toxins are the chemical defenses of plants against herbivory. Grasses have relatively few intrinsic toxins, relying more on growth habit to survive defoliation and endophytic fungal toxins as chemical defenses. Forage grasses that contain intrinsic toxins include Phalaris spp. (tryptamine and

Pericytes impair capillary blood flow and motor function after chronic spinal cord injury.

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Blood vessels in the central nervous system (CNS) are controlled by neuronal activity. For example, widespread vessel constriction (vessel tone) is induced by brainstem neurons that release the monoamines serotonin and noradrenaline, and local vessel dilation is induced by glutamatergic neuron

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