pyrrole/necrosis

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Disenecioyl dehydroretronecine--synthesis and acute hepatic toxicity of a pyrrolizidine alkaloid pyrrole analog.

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Disenecioyl dehydroretronecine (DSDR), a semi-synthetic analog of the highly reactive pyrrole metabolites of the pyrrolizidine alkaloids, has been synthesized from disenecioyl retronecine. Rats which received 40 mg DSDR/kg body weight via the mesenteric vein showed multiple depressed areas (less

Subacute toxicity of a halogenated pyrrole hydroxymethylglutaryl-coenzyme A reductase inhibitor in Wistar rats.

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Wistar rats received an hydroxymethylglutaryl-coenzyme A (HMG-CoA) reductase inhibitor, a halogenated pyrrole designated PD 123244-15, orally by gavage for 14 days at 10, 50, 150, 300, and 600 mg/kg. Doses of 150-600 mg/kg caused death and marked systemic toxicity involving stomach, esophagus,

Pyrrole detection and the pathologic progression of Cynoglossum officinale (houndstongue) poisoning in horses.

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Houndstongue (Cynoglossum officinale), a noxious weed that contains pyrrolizidine alkaloids (PAs), infests pastures and fields in the western United States and Europe. The purpose of this study was to develop techniques to better diagnose PA poisoning and describe the progression of gross and

Pyrrole-Derivative of Chalcone, (E)-3-Phenyl-1-(2-Pyrrolyl)-2-Propenone, Inhibits Inflammatory Responses via Inhibition of Src, Syk, and TAK1 Kinase Activities.

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(E)-3-Phenyl-1-(2-pyrrolyl)-2-propenone (PPP) is a pyrrole derivative of chalcone, in which the B-ring of chalcone linked to β-carbon is replaced by pyrrole group. While pyrrole has been studied for possible Src inhibition activity, chalcone, especially the substituents on the B-ring, has shown

An evaluation of procoagulant activity in the peripheral blood of rats treated with monocrotaline pyrrole.

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Monocrotaline pyrrole (MCTP), a putative toxic metabolite of the naturally occurring pyrrolizidine alkaloid, monocrotaline, causes pulmonary vascular thrombi that are associated with vascular remodeling, pulmonary hypertension, and right cardioventricular hypertrophy in rats. The thrombi are

Structure dependent selective efficacy of pyridine and pyrrole based Cu(II) Schiff base complexes towards in vitro cytotoxicity, apoptosis and DNA-bases binding in ground and excited state.

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This work highlights a systematic and comparative study of the structure-dependent influence of a series of biologically active Cu(II) Schiff base complexes (CSCs) on their in vitro cytotoxicity, apoptosis and binding with polymeric DNA-bases in ground and photo-excited states. The

Structure-activity relationship and liver microsome stability studies of pyrrole necroptosis inhibitors.

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Necroptosis is a regulated caspase-independent cell death pathway resulting in morphology reminiscent of passive non-regulated necrosis. Several diverse structure classes of necroptosis inhibitors have been reported to date, including a series of [1,2,3]thiadiazole benzylamide derivatives. However,

Tumor necrosis factor-alpha enhances neutrophil adhesiveness: induction of vascular cell adhesion molecule-1 via activation of Akt and CaM kinase II and modifications of histone acetyltransferase and histone deacetylase 4 in human tracheal smooth muscle cells.

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Up-regulation of vascular cell adhesion molecule-1 (VCAM-1) involves adhesions between both circulating and resident leukocytes and the human tracheal smooth muscle cells (HTSMCs) during airway inflammatory reaction. We have demonstrated previously that tumor necrosis factor (TNF)-alpha-induced

Effects of a pyrrole-based, microtubule-depolymerizing compound on RAW 264.7 macrophages.

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RAW 264.7 murine macrophages were exposed to the pyrrole-based compound 3,5-Dibromo-4-(3,4-dimethoxyphenyl)-1H-pyrrole-2-carboxylic acid ethyl ester (JG-03-14), which is a known microtubule depolymerizing agent with antitumor activity [1,2,3]. In this study exposure to JG-03-14 reduced the

Ethyl-2-amino-pyrrole-3-carboxylates are active against imatinib-resistant gastrointestinal stromal tumors in vitro and in vivo.

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We showed recently that ethyl-2-amino-pyrrole-3-carboxylates (EAPCs) exhibit potent antiproliferative activities against a broad spectrum of soft tissue sarcoma and gastrointestinal stromal tumor (GIST) cell lines in vitro. The molecular mechanism of action was owing to inhibition of tubulin

Cytotoxic carcinogeneic response to monocrotaline pyrrole.

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The cytotoxic and carcinogenic effects of MCP, the possible proximate metabolite of the alkaloid monocrotaline, were investigated in rats by the subcutaneous route. Sequential of MCP subcutaneously produced an acute inflammatory reaction with necrosis of the local tissue. A slight delay in

Pharmacology of [3H]-pyrilamine binding and of the histamine-induced inositol phosphates generation, intracellular Ca2+ -mobilization and cytokine release from human corneal epithelial cells.

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We recently reported on the successful generation of immortalized (CEPI-17-CL4) cells from primary human corneal epithelial (P-CEPI) cells which exhibited phenotypic, immunohistochemical and metabolic characteristics akin to the P-CEPI cells. The aims of the present studies were to investigate the

The toxic effects in rats of some synthanecine carbamate and phosphate esters analogous to hepatotoxic pyrrolizidine alkaloids.

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Five synthetic compounds analogous to pyrrolizidine alkaloids have been tested for toxicity in rats. These were the bis-N-ethylcarbamate esters of synthanecines A, B, C and D (Compounds I-IV) and the bis-diethylphosphate ester (V) of synthanecine A. The amino alcohol moiety in each of these had a

Effects of δ-aminolevulinic acid dehydratase silencing on the primary and secondary metabolisms of citrus.

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δ-aminolevulinic acid dehydratase (ALAD) is an important enzyme in tetrapyrrole synthesis. ALAD combines two δ-aminolevulinic acid (δ-ALA) molecules to form the pyrrole molecule, porphobilinogen, an important precursor for plant pigments involved in photosynthesis, respiration,

Differences in extracellular matrix proteins between Friesian horses with aortic rupture, unaffected Friesians and Warmblood horses.

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BACKGROUND Unlike in Warmblood horses, aortic rupture is quite common in Friesian horses, in which a hereditary trait is suspected. The aortic connective tissue in affected Friesians shows histological changes such as medial necrosis, elastic fibre fragmentation, mucoid material accumulation and

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