pyrrolizidine/التهاب

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Comparison of the anti-inflammatory active constituents and hepatotoxic pyrrolizidine alkaloids in two Senecio plants and their preparations by LC-UV and LC-MS.

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Two Senecio plants, Senecio cannabifolius Less. and its variety S. cannabifolius Less. var. integrifolius (Kiodz.) Kidam., were both used as the raw material of Feining granule, a traditional Chinese medicine product for treating respiratory diseases. In this study, the chemical profiles of these

Anti-inflammatory Activity of Pyrrolizidine Alkaloids from the Leaves of Madhuca pasquieri (Dubard).

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A novel pyrrolizidine alkaloids, madhumidine A (1), and two known alkaloids, lindelofidine benzoic acid ester (2) and minalobine B (3) were isolated from the leaves of Madhuca pasquieri (Dubard) H. J. LAM. The chemical structures of these alkaloids were established mainly by NMR techniques and mass

Echium plantagineum L. honey: Search of pyrrolizidine alkaloids and polyphenols, anti-inflammatory potential and cytotoxicity

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For a long time, honey has been recognized for its health-promoting properties and, consequently, has been used in traditional medicine worldwide. Apart from the beneficial bioactive compounds found in this food (e.g. polyphenols), molecules with potentially harmful effects may also be present, such

Simultaneous investigation of sesquiterpenes, pyrrolizidine alkaloids and N-oxides in Butterbur (Petasites hybridus) with an offline 2D-combination of HPLC-UV and LC-MMI-ToF-MS.

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With the worldwide rapid increasing interest in the use of natural products as dietary supplements, medical remedies and functional foods, it has been accepted that omitting the plant constituents with potential adverse effects was a huge fault of the past. Several countries developed regulations to

Liver inflammation during monocrotaline hepatotoxicity.

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Monocrotaline (MCT) is a pyrrolizidine alkaloid (PA) plant toxin that causes hepatotoxicity in humans and animals. Human exposure occurs from consumption of contaminated grains and herbal teas and medicines. Intraperitoneal injection (i.p.) of 300 mg/kg MCT in rats produced time-dependent hepatic

Is comfrey root more than toxic pyrrolizidine alkaloids? Salvianolic acids among antioxidant polyphenols in comfrey (Symphytum officinale L.) roots.

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Comfrey root preparations are used for the external treatment of joint distortions and myalgia, due to its analgesic and anti-inflammatory properties. Up to date, key activity-determining constituents of comfrey root extracts have not been completely elucidated. Therefore, we applied different

Heme oxygenase-1 reduces murine monocrotaline-induced pulmonary inflammatory responses and resultant right ventricular overload.

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Monocrotaline (MT), a pyrrolizidine alkaloid, causes pulmonary hypertension (PH) in rats and is widely utilized to analyze the pathophysiology of PH. However, a murine PH model with which transgenic animals may be used has not been established. To establish a murine MT-induced PH model, we

Pyrrolizidine alkaloid-induced alterations of prostanoid synthesis in human endothelial cells.

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Pyrrolizidine alkaloids (PA) are a group of secondary plant metabolites belonging to the most widely distributed natural toxins. PA intoxication of humans leads to severe liver damage, such as hepatomegaly, hepatic necrosis, fibrosis and cirrhosis. An acute consequence observed after ingestion of

Gynura Rhizoma containing pyrrolizidine alkaloids induces the hepatic sinusoidal obstruction syndrome in mice via upregulating fibrosis-related factors.

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Recently, hepatic sinusoidal obstruction syndrome (HSOS) caused by herbal preparations containing pyrrolizidine alkaloids (PAs), such as Gynura Rhizoma (Tusanqi), has gained global attention. However, the lack of a reliable and reproducible animal model has greatly hampered mechanistic studies.

Reduction of Pyrrolizidine Alkaloid Levels in Comfrey (Symphytum officinale) Hairy Roots by RNAi Silencing of Homospermidine Synthase.

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Comfrey is a medicinal plant, extracts of which are traditionally used for the treatment of painful inflammatory muscle and joint problems, because the plant contains allantoin and rosmarinic acid. However, its medicinal use is limited because of its toxic pyrrolizidine alkaloid (PA) content. PAs

Liver inflammatory injury initiated by DAMPs-TLR4-MyD88/TRIF- NFκB signaling pathway is involved in monocrotaline-induced HSOS.

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Hepatic sinusoidal obstruction syndrome (HSOS) causes considerable morbidity and mortality in clinic. Up to now, the molecular mechanisms involved in the development of HSOS still remain unclear. Here, we report that hepatic inflammation initiated by damage-associated molecular patterns (DAMPs)

Dose-response relationship in intoxication by the pyrrolizidine alkaloid monocrotaline.

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Rats develop pulmonary hypertension over a 2-wk period of continuous ingestion of monocrotaline dissolved in drinking water (20 mg/l). The relationship between monocrotaline concentration and duration of exposure was investigated by giving male rats (initial body weight 100 g) monocrotaline in

Inhibitory effect of a pyrrolizidine alkaloid, crotalaburnine, on rat paw oedema and cotton pellet granuloma.

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1 The anti-inflammatory activity of crotalaburnine (=anacrotine) was investigated against increased vascular permeability and oedema produced by formalin, carrageenin, hyaluronidase, 5-hydroxytryptamine, dextran, bradykinin and prostaglandin, and against formation of granulation tissues by

Pyrrolizidine alkaloids enhance alcohol-induced hepatocytotoxicity in vitro in normal human hepatocytes.

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Herbal remedies containing pyrrilidozine alkaloids (PA)s can induce liver damage, including hepato-sinusoidal obstruction syndrome (HSOS) or veno-occlusive liver disease (VOD). Some individuals misusing alcohol consume also teas and/or herbal remedies containing PA. The interaction or additive

The role of Kupffer cells and TNF-alpha in monocrotaline and bacterial lipopolysaccharide-induced liver injury.

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Coexposure to small, noninjurious doses of the pyrrolizidine alkaloid phytotoxin monocrotaline (MCT) and bacterial lipopolysaccharide (LPS) results in synergistic hepatotoxicity. Both centrilobular and midzonal liver lesions occur and are similar to those seen from large, toxic doses of MCT and LPS,

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