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Cytochrome P450

Cytochrome P450 (CYP) inhibitors act on heme enzymes that oxidize drugs, steroids and other lipophilic compounds. The name comes from the 450 nm absorption peak of a carbon monoxide-bound pigment, described in liver microsomes in 1964. Hepatic enzymes such as CYP3A4, CYP2C9 and CYP1A2 metabolize a large share of drugs and many environmental chemicals. Other members synthesize steroid hormones, among them CYP17A1, which is required for androgen production. The P450 system can also convert chemicals into toxic or carcinogenic metabolites, which links it closely to toxicology. Abiraterone inhibits CYP17A1, while clarithromycin and itraconazole serve as CYP3A4 inhibitors in drug-interaction studies. Alizarin is listed for its inhibition of enzymes in the CYP1 family.

3 Items

  • Cyproterone acetate
    Cat. No.
    A11409
    CAS No.
    427-51-0

    Cyproterone acetate

    Cyproterone acetate is a synthetic derivative of 17-hydroxyprogesterone, and acts as an androgen receptor antagonist as well as a weak progesterone receptor agonist with weak progestational and glucocorticoid activity.

    In stock View Details
    100 mg
    $25.00
    200 mg
    $40.00
    All 4 sizes
  • RG-12525
    Cat. No.
    A19926
    CAS No.
    120128-20-3

    RG-12525

    Synonyms: NID 525

    RG-12525 is a a specific, competitive and orally effective antagonist of the peptidoleukotrienes, LTC4, LTD4 and LTE4, inhibiting LTC4-, LTD4- and LTE4-inducd guinea pig parenchymal strips contractions, with IC50s of 2.6 nM, 2.5 nM and 7 nM, respectively; RG-12525 is also a peroxisome proliferator-activated receptor gamma (PPAR-gamma) agonist with IC50 of appr 60 nM and a potent inhibitor of CYP3A4, with a Ki value of 0.5 µM.

    In stock View Details
    1 mg
    $90.00
    2 mg
    $160.00
    All 7 sizes

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