pyrrolizidine/نخر

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Biochemical basis of liver necrosis caused by pyrrolizidine alkaloids and certain other hepatotoxins.

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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

Model systems for detecting the hepatic toxicity of pyrrolizidine alkaloids and pyrrolizidine alkaloid N-oxides.

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Indicine N-oxide (INO) is a pyrrolizidine alkaloid (PA) with antitumor activity in animals and humans. Prior studies showed that despite the known hepatic toxicity of the PAs, INO did not produce hepatic toxicity in animals but caused unpredictable lethal hepatic toxicity in humans. In this study we

Genotoxicity and cytotoxicity of selected pyrrolizidine alkaloids, a possible alkenal metabolite of the alkaloids, and related alkenals.

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Recently our laboratory isolated trans-4-OH-2-hexenal from the hepatic microsomal metabolism of the macrocyclic pyrrolizidine alkaloid (PA) senecionine and demonstrated in vivo that hepatic necrosis occurred following injection into the hepatic portal vein. To demonstrate similarities in the toxic

Metabolism and toxicity of anacrotine, a pyrrolizidine alkaloid, in rats.

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The effects of anacrotine, a pyrrolizidine alkaloid (PA) which has the structure of senecionine with an additional 6-hydroxy group, have been investigated in weanling male rats. When anacrotine was given i.p. (100 mg/kg), pyrrolic metabolites reached a peak level in the liver during the first 0.5 h,

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

A comparison of the pneumotoxicity of some pyrrolic esters and similar compounds analogous to pyrrolizidine alkaloid metabolites, given intravenously to rats.

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Toxic effects of 14 esters with chemical properties similar to those of pyrrolic pyrrolizidine alkaloid metabolites, were investigated in rats. The compounds were either mono- or bifunctional alkylating agents. When single doses were injected into a tail vein, the lungs were the main organ affected.

[Clinicopathological analysis of 16 cases of pyrrolizidine alkaloids-associated hepatic sinusoidal obstruction syndrome].

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Objective: To observe the histopathological manifestations of liver biopsy in patients with hepatic sinusoidal obstruction syndrome (HSOS) induced by pyrrolizidine alkaloid (PA). Methods: Patients diagnosed with PA-HSOS from 2012 to 2017 were selected, and the general conditions, liver

Reversible hepatic veno-occlusive disease in an infant after consumption of pyrrolizidine-containing herbal tea.

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Veno-occlusive disease was diagnosed in an 18-month-old boy who had regularly consumed a herbal tea mixture since the 3rd month of life. The boy developed portal hypertension with severe ascites. Histology of the liver showed centrilobular sinusoidal congestion with perivenular bleeding and

Hepatotoxicity associated with pyrrolizidine alkaloid (Crotalaria spp) ingestion in a horse on Easter Island.

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Since 1984, a significant number of privately owned and feral horses on Easter Island have died of a syndrome consisting of progressive anorexia, weight loss, obtundation, and other central nervous system abnormalities. A single horse experiencing clinical signs of the reported syndrome was

Carcinogenic activity of petasitenine, a new pyrrolizidine alkaloid isolated from Petasites japonicus Maxim.

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The carcinogenic activity of petasitenine, a new pyrrolizidine alkaloid isolated from young flower stalk of Petasites japonicus, was studied in ACI rats. All rats that had received a 0.05% solution of petasitenine in drinking water died or were killed in moribund condition 72 days after the start of

Effect of prednisone on transforming growth factor-β1, connective tissue growth factor, nuclear factor-κBp65 and tumor necrosis factor-α expression in a murine model of hepatic sinusoidal obstruction syndrome induced by Gynura segetum.

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OBJECTIVE One major cause of hepatic sinusoidal obstruction syndrome (HSOS) is the consumption of products containing pyrrolizidine alkaloids (PA). As the use of herbal preparations has increased in China, so has the number of reports of HSOS induced by ingesting PA-containing herbs. The aim of the

The first report of pyrrolizidine alkaloid poisoning in a gazelle (Gazella Subgutturosa) - histopathologic diagnosis.

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Pyrrolizidine alkaloids (PAs) are natural phytotoxins found in thousands of plant species around the world. They are probably the most common poisonous plants affecting livestock, wildlife and humans. The disease occurs almost entirely as a consequence of chronic poisoning and in general ends

Comparative effects of antioxidants on the toxicity of mixed pyrrolizidine alkaloids from Senecio jacobaea in mice.

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The comparative effects of the antioxidants, butylated hydroxyanisole (BHA), ethoxyquin, and cysteine on pyrrolizidine-alkaloid-induced (PA-induced) lethality and acute hepatotoxicity were assessed in female mice. Diets containing 0.75% BHA, 0.25% ethoxyquin, or 1% cysteine were fed to mice for 10 d

Modifications of chronic hepatotoxicity of pyrrolizidine (Senecio) alkaloids by butylated hydroxyanisole and cysteine.

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The chronic hepatotoxic effects of mixed pyrrolizidine alkaloids (PAs) from the poisonous plant tansy ragwort (Senecio jacobaea) and the ability of butylated hydroxyanisole (BHA) and cysteine to alter these hepatic effects were studied in male rats. In control animals, the i.p. administration of a

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