hydroxamic acid/نقص الأكسجة

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[The effect of linoleyl hydroxamic acid on lipid peroxidation processes and on the enzymatic activity of the antioxidant system in rats under hypoxia].

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It was studied the effect of new blocker of lipoxygenase way of arachidontic acid metabolism--linoleyl-hydroxamic acid--on the status of lipid peroxidation and antioxidant system in blood, heart, liver, lung and brain in rats under acute hypoxic hypoxia. It was shows that preliminary introduction of

Models of hypoxia activated prodrugs: Co(III) complexes of hydroxamic acids.

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Co(III) complexes of simple hydroxamic acids have been evaluated as models of hypoxia activated prodrugs containing MMP inhibitors. The complexes are based upon a proposed carrier system comprising the tripodal tetradentate ligand tris(2-methylpyridyl)amine (tpa) with the hydroxamate functionality

Histone deacetylase inhibitors promote eNOS expression in vascular smooth muscle cells and suppress hypoxia-induced cell growth.

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Hypoxia stimulates excessive growth of vascular smooth muscle cells (VSMCs) contributing to vascular remodelling. Recent studies have shown that histone deacetylase inhibitors (HDIs) suppress VSMC proliferation and activate eNOS expression. However, the effects of HDI on hypoxia-induced VSMC growth

Structural basis for binding of cyclic 2-oxoglutarate analogues to factor-inhibiting hypoxia-inducible factor.

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Aromatic analogues of the 2-oxoglutarate co-substrate of the hypoxia-inducible factor hydroxylases are shown to bind at the active site iron: Pyridine-2,4-dicarboxylate binds as anticipated with a single molecule chelating the iron in a bidentate manner. The binding mode of a hydroxamic acid

Cancer therapeutic agents targeting hypoxia-inducible factor-1.

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The discovery of hypoxia-inducible factor-1 has led to a rapidly increasing understanding of the molecular mechanism of tumor hypoxia in the past two decades. Today it is generally accepted that HIF-1 plays a pivotal role in the cellular response to tumor hypoxia which represents a major obstacle to

Suberoylanilide hydroxamic acid (Zolinza/vorinostat) sensitizes TRAIL-resistant breast cancer cells orthotopically implanted in BALB/c nude mice.

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The purpose of this study was to examine whether histone deacetylase inhibitor suberoylanilide hydroxamic acid (SAHA; Zolinza/vorinostat) could sensitize tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-resistant breast carcinoma in vivo. BALB/c nude mice were orthotopically implanted

A novel Ca2+/calmodulin antagonist HBC inhibits angiogenesis and down-regulates hypoxia-inducible factor.

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Recent reports have shown that Ca(2+)/calmodulin (Ca(2+)/CaM) signaling plays a crucial role in angiogenesis. We previously developed a new Ca(2+)/CaM antagonist, HBC (4-{3,5-bis-[2-(4-hydroxy-3-methoxyphenyl)ethyl]-4,5-dihydropyrazol-1-yl}benzoic acid), from a curcumin-based synthetic chemical

Towards bioreductively activated prodrugs: Fe(III) complexes of hydroxamic acids and the MMP inhibitor marimastat.

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Fe(III)-salen (N,N-bis(salicylidene)-ethane-1,2-diimine) complexes of simple hydroxamic acids and the MMP (matrix metalloproteinase) inhibitor marimastat have been evaluated as hypoxia activated drug carriers. The aceto- (aha), propion- (pha), benzohydroxamato (bha), and marimastat complexes were

The mechanism underlying nitroxyl and nitric oxide formation from hydroxamic acids.

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BACKGROUND The pharmacological effects of hydroxamic acids (RC(O)NHOH, HX) are partially attributed to their ability to serve as HNO and/or NO donors under oxidative stress. Given the development and use of HXs as therapeutic agents, elucidation of the oxidation mechanism is needed for more educated

Robust vascular protective effect of hydroxamic acid derivatives in a sickle mouse model of inflammation.

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OBJECTIVE Clinically, the vascular pathobiology of human sickle cell disease includes an abnormal state of chronic inflammation and activation of the coagulation system. Since these biologies likely underlie development of vascular disease in sickle subjects, they offer attractive targets for novel

[Correlation of tissue respiration and some mitochondria stereometric characteristics of the lung tissue in different modifications of hypoxic hypoxia].

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In experiments on the adult white laboratory rats the correlation of tissue respiration and some morpho- and stereometric characteristics of mitochondria in lung tissue under breathing by air and gas mixture with 7% O2 in N2 was investigated. The following agents were used as modulators:

Downregulation of hypoxia-related responses by novel antitumor histone deacetylase inhibitors in MDAMB231 breast cancer cells.

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The tumor microenvironment is characterized by a poor circulation which results in the selection of neoplastic cells that can grow or survive under hypoxic conditions. The relationship between hypoxia and histone deacetylase (HDAC) inhibitors has been previously established. In this work we

Suberoylanilide hydroxamic acid radiosensitizes tumor hypoxic cells in vitro through the oxidation of nitroxyl to nitric oxide.

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The pharmacological effects of hydroxamic acids are partially attributed to their ability to serve as HNO and/or NO donors under oxidative stress. Previously, it was concluded that oxidation of the histone deacetylase inhibitor suberoylanilide hydroxamic acid (SAHA) by the metmyoglobin/H2O2 reaction

Histone deacetylation inhibition in pulmonary hypertension: therapeutic potential of valproic acid and suberoylanilide hydroxamic acid.

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BACKGROUND Epigenetic programming, dynamically regulated by histone acetylation, is a key mechanism regulating cell proliferation and survival. Little is known about the contribution of histone deacetylase (HDAC) activity to the development of pulmonary arterial hypertension, a condition

Epigenetic repression of DNA mismatch repair by inflammation and hypoxia in inflammatory bowel disease-associated colorectal cancer.

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Sporadic human mismatch repair (MMR)-deficient colorectal cancers account for approximately 12.5% of all cases of colorectal cancer. MMR-deficient colorectal cancers are classically characterized by right-sided location, multifocality, mucinous histology, and lymphocytic infiltration. However,

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