pepstatin/hemorrhage

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'Partitagin' a hemorrhagic metalloprotease from Hippasa partita spider venom: role in tissue necrosis.

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The poisonous bite by Hippasa partita, a funnel web spider from the Indian subcontinent has been demonstrated to give rise to severe dermo- and myonecrosis. In this work a hemorrhagic metalloprotease, Partitagin was purified from H. partita venom by successive chromatography on Sephadex G-100, DEAE

An inhibitor of leukocyte elastase prevents immune complex-mediated hemorrhage in the rat lung.

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The typical reverse passive Arthus reaction (RPA) was attained in rats by the instillation of a rabbit antiovalbumin serum into the lungs and intravenous injection of ovalbumin. Instillation of antiserum alone caused accumulation of polymorphonuclear leukocytes (PMN) and increased vascular

Purification and characterisation of two hemorrhagic metalloproteinases from the venom of the long-nosed viper, Vipera ammodytes ammodytes.

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Two hemorrhagic proteins, VaH1 and VaH2, have been purified from Vipera ammodytes ammodytes venom. They are monomeric glycoproteins of an apparent molecular mass of 70kDa and multiple isoelectric points around pH 5.5. Both molecules are proteolytically active against azocasein as substrate. VaH1,

Acute hemorrhagic pancreatic necrosis in mice. Effects of proteinase inhibitors on its induction.

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An acute hemorrhagic pancreatitis with fat necrosis (AHPN) was induced in female mice fed a choline-deficient diet containing 0.5% DL-ethionine. The effect of various proteinase inhibitors on the induction of the pancreatitis was evaluated using three parameters, the mortality of the animals, the

Isolation and biological characterization of Batx-I, a weak hemorrhagic and fibrinogenolytic PI metalloproteinase from Colombian Bothrops atrox venom.

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A hemorrhagic metalloproteinase, named Batx-I, was isolated from the venom of Bothrops atrox specimens (from Southeastern Colombian region) by a combination of CM-Sephadex C25 ion-exchange and Affi-gel Blue affinity chromatographies. This enzyme accounts for about 45% of venom proteins, and it has

Pathogenic importance of pepsin in ischemia/reperfusion-induced gastric injury.

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We investigated the role of pepsin in the development of ischemia/reperfusion (I/R)-induced gastric lesions in rats. Under urethane anesthesia, the pylorus was ligated, the celiac artery was clamped, and 1 ml of HCl (50-150 mM) was instilled in the stomach. Then, reperfusion was established 15 min

A non-toxic anticoagulant metalloprotease: purification and characterization from Indian cobra (Naja naja naja) venom.

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A non-toxic potent anticoagulant metalloprotease NN-PF(3) has been purified to homogeneity from the Indian cobra (Naja naja naja) venom through a combination of column chromatography and electrophoresis. NN-PF(3) is a single chain protein with a molecular weight of 68 kDa by SDS-PAGE. It hydrolysed

Increase in survival time of liver transplants by protease inhibitors and a calcium channel blocker, nisoldipine.

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Kupffer cells are activated by calcium and release a variety of toxic mediators, including proteases. The purpose of these studies, therefore, was to determine if protease inhibitors and a calcium channel blocker could increase survival time in the rat model of orthotopic liver transplantation.

Clot lysis by gastric juice: an in vitro study.

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Gastric juice from patients with peptic ulcer disease and from patients with no upper gastrointestinal abnormality was studied in order to assess its effect on a formed fibrin clot. In both groups of patients gastric juice caused a marked increase in fibrinolysis as evidenced by a shortening of the

Purification and enzymatic characterization of a novel metalloprotease from Lachesis muta rhombeata snake venom.

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Background

Lachesis muta rhombeata (Lmr) is the largest venomous snake in Latin America and its venom contains mainly enzymatic components, such as serine and metalloproteases, L-amino acid oxidase and phospholipases A₂. Metalloproteases comprise a large group

Isolation and characterization of synergistic hemorrhagins from the venom of the snake Bothrops asper.

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Three hemorrhagic factors (BaH1, BH2 and BH3) were isolated from the venom of Bothrops asper by gel filtration on Sephacryl S-200, DEAE-Sepharose chromatography, metal chelate affinity chromatography and hydrophobic interaction chromatography. They contain 55% of the total hemorrhagic activity of

Pharmacodynamic evaluation of human cerebral arteries in the genesis of vasospasm.

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Experiments were performed on isolated human cerebral arteries to evaluate the role desensitization and tachyphylaxis might play in preventing certain agonists from producing prolonged vasoconstriction after subarachnoid hemorrhage. In addition, the antiproteases leupeptin and pepstatin were studied

Intramucosal activation of pepsinogens in the pathogenesis of acute gastric erosions and their prevention by the potent semisynthetic amphipathic inhibitor pepstatinyl-glycyl-lysyl-lysine.

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This study was designed to test the proposal that a critical event in the formation of acute gastric erosions is the intramucosal activation of pepsinogens. Gastric erosions were induced in rats by controlled haemorrhagic shock. Free acid proteinase activity in homogenates of gastric mucosa taken to

Effect of brown spider venom on basement membrane structures.

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Loxoscelism or necrotic arachnidism are terms used to describe lesions and reactions induced by bites (envenomation) from spiders of the genus Loxosceles. Envenomation has been reported to provoke dermonecrosis and haemorrhage at the bite site and haemolysis, disseminated intravascular coagulation

SFTS phlebovirus promotes LC3-II accumulation and nonstructural protein of SFTS phlebovirus co-localizes with autophagy proteins.

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Autophagy is essential for eukaryotic cell homeostasis and can perform both anti-viral and pro-viral roles depending on the kinds of viruses, cell types and cell environment. Severe fever with thrombocytopenia syndrome phlebovirus (SFTSV) is a newly discovered tick-borne virus in the Phenuiviridae

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