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Involvement of cytochrome P450 1A in sanguinarine detoxication

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15110%2F04%3A00000855" target="_blank" >RIV/61989592:15110/04:00000855 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Involvement of cytochrome P450 1A in sanguinarine detoxication

  • Original language description

    Sanguinarine (SA), a member of the benzo[c]phenanthridine alkaloids, is a potent anti-microbial agent with anti-inflammatory and anti-neoplastic properties. However, toxicity of the alkaloid severely limits its medical applications. Recent report by Williams et al. implicated rat hepatic cytochrome P450 (CYP) 1A2 as a likely modulator of SA toxicity. Indeed, the in vitro toxicity of SA in primary culture of rat hepatocytes and human hepatic cell line HepG2, demonstrated as lactate dehydrogenase leakageand metabolic capability (MTT assay), was diminished following induction of CYP1A by 2,3,7,8-tetrachlorodibenzo-p-dioxin, 3-methylcholanthrene, and beta-naphtoflavone. Using microsomes containing recombinant CYP1A1 or CYP1A2 we show that SA causes non-competitive inhibition of the former and competitive inhibition of the latter as assessed by ethoxyresorufin de-ethylation (EROD). In human hepatic microsomes SA exhibits competitive inhibition of EROD activity with apparent K(i) of 2 micro

  • Czech name

    Zapojení cytochromu P450 1A do detoxikace sanguinarinu

  • Czech description

    Sanguinarin (SA) je benzo[c]fenanthridinový alkaloid s antimikrobiálními, protizánětlivými a protirakovinovými vlastnostmi. Jeho použití v medicíně je však omezeno jeho toxicitou. Podle Williamse et al. [Vet. Hum. Toxicol. 42 (2000) 196] má potkaní jaterní cytochrom P450 (CYP) 1A2 pravděpodobně schopnost ovlivňovat toxicitu SA. Po indukci CYP1A 2,3,7,8-tetrachlorodibenzo-p-dioxinem, 3-methylcholanthrenem a ß-naftoflavonem došlo opravdu v primární kultuře potkaních hepatocytů a v buňkách HepG2 ke sníženíin vitro toxicity SA hodnocené stanovením aktivity laktátdehydrogenasy uvolněné do média a stanovením životnosti buněk MTT testem. Při použití mikrosomů obsahujících rekombinantní enzymy SA inhibuje nekompetitivně aktivitu CYP1A1 a kompetitivně aktivituCYP1A2 sledovanou jako deethylaci 7-ethoxyresorufinu (EROD). U lidských jaterních mikrosomů SA inhibuje kompetitivně EROD aktivitu s hodnotou Ki 2 #M, která je shodná jako u rekombinantního CYP1A2. SA inhibuje také aktivitu NADPH:CYP-red

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CE - Biochemistry

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GP303%2F01%2FP085" target="_blank" >GP303/01/P085: Cytotoxicity of some phytopreparations and dietary supplements</a><br>

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2004

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Toxicology Letters

  • ISSN

    0378-4274

  • e-ISSN

  • Volume of the periodical

    151

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    IE - IRELAND

  • Number of pages

    13

  • Pages from-to

    375-387

  • UT code for WoS article

  • EID of the result in the Scopus database