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The Effect of the Synthetic Haemorrhagic Agent, 3,3'-Methylenebis (4-Hydroxycoumarin), in Prolonging the Coagulation and Prothrombin Time in the Human Subject.

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Studies on the Hemorrhagic Agent 3,3'-Methylenebis (4-Hydroxycoumarin): IV. The Pathologic Findings after the Administration of Dicumarol.

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A novel 4-hydroxycoumarin biosynthetic pathway.

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Coumarin forms in melilotoside (trans-ortho-coumaric acid glucoside)-containing plant species upon cell damage. In moldy melilotoside-containing plant material, trans-ortho-coumaric acid is converted by fungi to 4-hydroxycoumarin, two molecules of which spontaneously combine with formaldehyde to

Application of a New Established System for Toxic Doses in Children With 4-Hydroxycoumarin Rodenticide Intoxication.

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The toxic dose of rodenticides in children is extremely difficult to be determined because of the uncertain exposure history. We established and validated a method to identify the toxic dose in children of 4-hydroxycoumarin (TDCH). Items were selected by Delphi method and weighted by analytic

Pharmacogenomics of 4-hydroxycoumarin anticoagulants.

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Oral anticoagulants of the 4-hydroxycoumarin class, typified by warfarin, are used worldwide to treat thromboembolic disease. These drugs show the beneficial attributes of high efficacy and low cost, but patient management can be complicated by their narrow therapeutic index and wide

Acute toxicity of ferulenol, a 4-hydroxycoumarin isolated from Ferula communis L.

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The acute LD50s of ferulenol were determined in albino mice by single po or ip as 2,100 and 319 mg/kg bw, respectively. Ferulenol had a higher LD50 compared to warfarin and thus has a lower acute toxicity. Three days after ferulenol administration, dosed animals showed hypoprothrombinemia with

Warfarin and vitamin K.

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Warfarin and other 4-hydroxycoumarins are effective antithrombotic agents. They affect four blood coagulation proteins that act sequentially to produce thrombin. Coumarin therapy decreases the biological activity of these proteins, and therefore decreases the rate at which blood clots. As the

Adherence to Long-Term Follow-Up of Patients with Life-Threatening, Inhaled Synthetic Cannabinoids-Associated Coagulopathy in Chicago.

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A large-scale outbreak of life-threatening, inhaled synthetic cannabinoids (Spice/K2)-associated coagulopathy with bleeding complications was recently reported in Illinois. The causative agents were brodifacoum, difenacoum, and bromadiolone, potent, long-acting, 4-hydroxycoumarin anticoagulant

[Anticoagulant activity of coumarins from Ferula communis L].

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Ferula communis is an ombelliferous plant of the Mediterranean regions. It is represented in Morocco by two varieties: brevifolia and genuina. The later is very rich in a soap or resinous gum. This product, collected from the roots, is largely used in traditional medicine. It is know as fessoukh in

Importance of segmental hair analysis in a suspected case of attempted homicide by flocoumafen and difenacoum

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The 4-hydroxycoumarin derivatives are the most used rodenticides and act as classical anticoagulants, interfering with the production of clotting factors in liver by antagonizing the action of vitamin K reductase, thereby inhibiting recycling of vitamin K1, involved in activation of blood clotting

Spontaneous hemoperitoneum from brodifacoum overdose.

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Brodifacoum is a 4-hydroxycoumarin derivative that is commonly used as a rodenticide. Human exposures have produced severe coagulopathies resulting in hematuria, gastrointestinal bleeding, intracranial hemorrhage, and death. This is the first report of spontaneous hemoperitoneum secondary to

Superwarfarin poisoning.

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Superwarfarins consist of two classes of compounds, the 4-hydroxycoumarins and the indandiones. These compounds have replaced warfarin as an anticoagulant rodenticide. This article is a summary of the clinical effects produced by accidental and deliberate ingestions of superwarfarins. Most

Structural Modeling Insights into Human VKORC1 Phenotypes.

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Vitamin K 2,3-epoxide reductase complex subunit 1 (VKORC1) catalyses the reduction of vitamin K and its 2,3-epoxide essential to sustain γ-carboxylation of vitamin K-dependent proteins. Two different phenotypes are associated with mutations in human VKORC1. The majority of mutations cause resistance

Anticoagulant rodenticides.

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Anticoagulant pesticides are used widely in agricultural and urban rodent control. The emergence of warfarin-resistant strains of rats led to the introduction of a new group of anticoagulant rodenticides variously referred to as 'superwarfarins', 'single dose' or 'long-acting'. This group includes

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