l lysine/hypoxia

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Neuroprotective effect of L-lysine monohydrochloride on acute iterative anoxia in rats with quantitative analysis of electrocorticogram.

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Lysine is one of the indispensible amino acids and L-lysine monohydrochloride (LMH) is widely available to public as a nonprescription oral supplement. Potential clinical usefulness of oral LMH supplements has been indicated in stroke, hypertension, and seizure induced by pentylenetetrazole (PTZ),

The effect of insulin-loaded linear poly(ethylene glycol)-brush-like poly(l-lysine) block copolymer on renal ischemia/reperfusion-induced lung injury through downregulating hypoxia-inducible factor.

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The aim of this study was to observe the therapeutic effect of insulin-loaded linear poly(ethylene glycol)-brush-like poly(l-lysine) block copolymer poly(ethylene glycol)-b-(poly(ethylenediamine l-glutamate)-g-poly(l-lysine)) (PEG-b-(PELG-g-PLL) on renal ischemia/reperfusion-induced lung injury

Severe pulmonary hypertension with therapeutic L-lysine ibuprofen in 2 preterm neonates.

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Persistently patent ductus arteriosus (PDA), affecting approximately one-third of all very low birth weight infants, can lead to significant morbidity and mortality. Recently, ibuprofen has been recommended over indomethacin to close PDAs because of a reduction in risk of necrotizing enterocolitis.

d,l-lysine functionalized Fe3O4 nanoparticles for detection of cancer cells.

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Amino-modified magnetic nanoparticles were prepared by direct chemisorption of biocompatible d,l-lysine (DLL) on electrostatically stabilized magnetic nanoparticles with the aim to bind specific antibodies (Ab) able to detect cancer cells. The magnetic nanoparticles prepared by coprecipitation were

Hypoxia inducible factor-1: regulation by nitric oxide in posthypoxic microvascular endothelium.

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Microvascular endothelial cells provide a critical regulatory interface between blood constituents and tissue. Hypoxia inducible factor-1 (HIF-1) is a key transcription factor required for expression of hypoxia-dependent genes. We employed a model of hypoxia and reoxygenation (H/R) using the dermal

Effects of short-term hypoxia on a transformed cell-based bioartificial pancreatic construct.

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Hypoxia is an adverse condition that can jeopardize the function of a bioartificial pancreatic construct. In this study we have investigated the effects of short-term hypoxic exposure (up to 24 h) on the bioenergetic status, metabolism, and insulin secretion of perfused pancreatic constructs

Chronic hypoxia inhibits contraction of fetal arteries by increased endothelium-derived nitric oxide and prostaglandin synthesis.

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OBJECTIVE Chronic hypoxia causes redistribution of fetal cardiac output by mechanisms poorly understood. We tested the hypothesis that chronic hypoxia alters vascular reactivity of arteries from near-term fetal guinea pigs. METHODS Pregnant guinea pigs (50 days, term = 65 days) were exposed to

Nitric oxide regulates the expression of heme carrier protein-1 via hypoxia inducible factor-1α stabilization.

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Photodynamic therapy (PDT) is a cancer therapy that capitalizes on cancer-specific porphyrin accumulation. We have investigated this phenomenon to propose the following three conclusions: 1) the mechanism underlying this phenomenon is closely related to both nitric oxide (NO) and heme carrier

Prevention of hypoxia-induced neuronal apoptosis through histone deacetylase inhibition.

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BACKGROUND We have recently discovered that administration of valproic acid (VPA), a histone deacetylase inhibitor, enhances nuclear histone acetylation and improves survival after lethal hemorrhage in rats. In the present study, neurons were subjected to severe hypoxic condition in vitro to test

Tf-PEG-PLL-PLGA nanoparticles enhanced chemosensitivity for hypoxia-responsive tumor cells.

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Hypoxia is an inseparable component of the solid tumor as well as the bone marrow microenvironment. In this study, we investigated the effect of the novel polyethylene glycol (PEG)-poly L-lysine (PLL)-poly lactic-co-glycolic acid (PLGA) based nanoparticles (NPs) modified by transferrin (Tf) loaded

Poly(ethylene glycol)-b-poly(lysine) copolymer bearing nitroaromatics for hypoxia-sensitive drug delivery.

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Hypoxia occurs in a variety of pathological conditions including stroke, rheumatoid arthritis, atherosclerosis, and tumors. In this study, an amphiphilic block copolymer, composed of poly(ethylene glycol) as the hydrophilic block and poly(ε-(4-nitro)benzyloxycarbonyl-L-lysine) as the hydrophobic

A biocompatible cobaltporphyrin-based complex micelle constructed via supramolecular assembly for oxygen transfer.

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Herein, a complex micelle as an oxygen nano-carrier is constructed through the hierarchical assembly of the diblock copolymer poly(ethylene glycol)-block-poly(l-lysine) (PEG-b-PLys), tetrakis(4-sulfonatophenyl)porphinato cobalt(ii) (Co(ii)TPPS), a heptapeptide (Cys-His-His-His-His-His-His) and

Role of pyruvate in ischaemia-like conditions on cultured neurons.

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In vitro, it is known that neurons in serum free mediums survive in the absence of glucose if pyruvate is present. We exposed cultured neurons on poly-L-lysine coated dishes to 6 different concentrations of pyruvate ranging from 0 to 1000 microM combined with glucose-supplement and normoxia

A Multifunctional Graphene Oxide Platform for Targeting Cancer.

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Diagnosis of oncological diseases remains at the forefront of current medical research. Carbonic Anhydrase IX (CA IX) is a cell surface hypoxia-inducible enzyme functionally involved in adaptation to acidosis that is expressed in aggressive tumors; hence, it can be used as a tumor biomarker. Herein,

Facile synthesis of fluorinated nanophotosensitizers with self-supplied oxygen for efficient photodynamic therapy.

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Tumor hypoxia severely reduces the efficiency of photodynamic therapy (PDT) through the insufficient supply of oxygen. In this work, we reported on a design of fluorinated nanophotosensitizers (NPSs) prepared by a facile reprecipitation-encapsulation method, with the aim of addressing the issue of

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