hydroxylamine/inflamație

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Noninvasive diagnostic tool for inflammation-induced oxidative stress using electron spin resonance spectroscopy and an extracellular cyclic hydroxylamine.

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Inflammation is one of the leading causes of the many pathological states associated with oxidative stress. A crucial role in the development of inflammation-induced oxidative stress is played by reactive oxidant species (ROS), which are very difficult to detect in vivo. One of the most sensitive

Anti-inflammatory and anti-allergic activities of hydroxylamine and related compounds.

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The anti-inflammatory activities of several novel oximes and O-acyl oximes that we synthesized have been reported based on carrageenan-induced rat foot-pad swelling assay and histamine-induced rat vascular permeability assay. A cyclooxygenase (COX)-1 inhibitory effect has also been reported for

Schiff base derivatives of anti-inflammatory 0-substituted hydroxylamines.

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Dapsone hydroxylamine-mediated alterations in human red blood cells from endometriotic patients.

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Endometriosis, an estrogen-dependent chronic gynecological disease in women of reproductive age, is characterized by a systemic inflammation status involving also red blood cells (RBCs). In this study, we evaluated how the protein oxidative status could be involved in the worsening of RBC conditions

Dapsone hydroxylamine inhibits the LTB4-induced chemotaxis of polymorphonuclear leukocytes into human skin: results of a pilot study.

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OBJECTIVE Dapsone (4,4'diaminodiphenylsulfone) is effective in treating leprosy, chronic inflammatory conditions and opportunistic infections in HIV patients. By the oral route, the sulfone is metabolized to monoacetyldapsone (MADDS) and dapsone hydroxylamine (DDS-NOH). We have addressed the

Metabolism of dapsone to a hydroxylamine by human neutrophils and mononuclear cells.

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Dapsone is an effective anti-inflammatory agent in conditions in which inflammation is mediated by neutrophils. Dapsone also has been associated with agranulocytosis. We found that neutrophils, which had been activated by a phorbol ester or opsonized zymosan, oxidized dapsone to its nitroderivative.

A hydroxamic acid-methacrylated collagen conjugate for the modulation of inflammation-related MMP upregulation.

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Medical devices with matrix metalloproteinase (MMP)-modulating functionality are highly desirable to restore tissue homeostasis in critical inflammation states, such as chronic wounds, rotator cuff tears and cancer. The introduction of MMP-modulating functionality in such devices is typically

Superoxide-dependent and -independent nitrite formation from hydroxylamine: inhibition by plant extracts.

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Reactive oxygen species such as OH, peroxynitrite and the non-radical, hypochlorous acid, play outstanding roles in many disease. The formation of OH (Fenton)-type radicals is catalyzed by enzymes such as xanthine oxidase (XOD) via one-electron reduction of molecular oxygen producing superoxide

The nitric oxide donors, azide and hydroxylamine, inhibit the programmed cell death of cytokine-deprived human eosinophils.

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Azide and hydroxylamine release nitric oxide (NO) enzymatically in biological conditions. We observed that both compounds were able to inhibit in vitro the programmed cell death of human eosinophils from peripheral blood. This protective effect could be mimicked by permeable cGMP analogs and by the

Design and preparation of a nanoprobe for imaging inflammation sites.

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To image inflammation sites, we developed a novel nanoparticle, hydroxylamine-containing nanoparticle (HANP), which emits an intense electron spin resonance (ESR)-signal triggered by enzymatic oxidation reaction and pH-sensitive self-disintegration. The nanoparticle was prepared from an amphiphilic

Synthesis of 5-phenyl-1-(3-pyridyl)-1H-1,2,4-triazole-3-carboxylic acid derivatives of potential anti-inflammatory activity.

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A series of 5-phenyl-1-(3-pyridyl)-1H-1,2,4-triazole-3-carboxylic acid derivatives 4-10 were synthesized by rearrangement of 4-(3-pyridyl)-hydrazono-2-phenyl-2-oxazolin-5-one 3 in the presence of different nucleophiles to afford derivatives 4, 7, and 8, while hydroxamic acid derivative 6 was

Upregulation of cystathionine-β-synthetase expression contributes to inflammatory pain in rat temporomandibular joint.

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BACKGROUND Hydrogen sulfide (H2S), an endogenous gaseotransmitter/modulator, is becoming appreciated that it may be involved in a wide variety of processes including inflammation and nociception. However, the role for H2S in nociceptive processing in trigeminal ganglion (TG) neuron remains unknown.

Non-steroidal anti-inflammatory agents: synthesis of novel benzopyrazolyl, benzoxazolyl and quinazolinyl derivatives of 4(3 H)-quinazolinones.

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Four novel series of 4(3 H)-quinazolinone derivatives have been synthesized by cyclization of the intermediate 3-aryl-2-(6-aryl-2-cyclohexen-1-on-5-yl)-4(3 H)-quinazolinones 3a-f with hydrazine, phenylhydrazine, hydroxylamine and thiourea. The products are 3-aryl-2-(6-aryl-3-methyl-1

Thermosensitive nanoparticles with pH-triggered degradation and release of anti-inflammatory cell-penetrating peptides.

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Poly(N-isopropylacrylamide-2-acrylamido-2-methyl-1-propanesulfonate) [poly(NIPAm-AMPS)] nanoparticles can be cross-linked with hydrolytically degradable N,O-dimethacryloyl hydroxylamine (DMHA) in order to yield a pH-sensitive drug delivery system that slowly erodes above pH 5.0. Varying the

Anti-inflammatory activity of some novel alpha-amino naphthalene derivatives.

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alpha-Acetylamino naphthalene (1) was reacted with different aromatic aldehydes and with primary or secondary amines to give alpha-aminonaphthylsubstitutedaryl chalkones (2-5) and alpha-(substituted aminoethyl)-amidonaphthalenes (14-25), respectively. These substituted chalkones were treated with

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