Liarozole hydrochloride  (Synonyms: R75251 hydrochloride)

Liarozole hydrochloride is an imidazole derivative and orally active retinoic acid (RA) metabolism-blocking agent (RAMBA). Liarozole hydrochloride inhibits the cytochrome P450 (CYP26)-dependent 4-hydroxylation of retinoic acid (IC₅₀=7 μM), resulting in increased tissue levels of retinoic acid. Liarozole hydrochloride shows antitumoral properties^[1][2][3].

IC50: 7 μM (P450)^[1]

Liarozole (0.01~10 μM; 9 days; MCF-7 cells) inhibits cells proliferation^[3].
Liarozole (1 μM; 4 days; mesenchymal cells) completely inhibits chondrogenesis^[4].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Liarozole (5-20 mg/kg; p.o.; 3 days) reverses the vaginal keratosis caused by estrogen stimulation^[5].
Liarozole (40 mg/kg; p.o.; 21 days) reduces tumor burden substantially^[6].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

345.23

C₁₇H₁₄Cl₂N₄

145858-50-0

Room temperature in continental US; may vary elsewhere.

Please store the product under the recommended conditions in the Certificate of Analysis.

• [1]. Kuijpers AL, et al. The effects of oral liarozole on epidermal proliferation and differentiation in severe plaque psoriasis are comparable with those of acitretin. Br J Dermatol. 1998;139(3):380-389.  [Content Brief]

  [2]. Lucker GP, et al. Oral treatment of ichthyosis by the cytochrome P-450 inhibitor liarozole. Br J Dermatol. 1997;136(1):71-75.  [Content Brief]

  [3]. Wouters W, et al. Effects of liarozole, a new antitumoral compound, on retinoic acid-induced inhibition of cell growth and on retinoic acid metabolism in MCF-7 human breast cancer cells. Cancer Res. 1992;52(10):2841-2846.  [Content Brief]

  [4]. Pignatello MA, et al. Liarozole markedly increases all trans-retinoic acid toxicity in mouse limb bud cell cultures: a model to explain the potency of the aromatic retinoid (E)-4-[2-(5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-naphthylenyl)-1-propenyl] benzoic acid. Toxicol Appl Pharmacol. 2002; 178(3):186-194.  [Content Brief]

  [5]. Van Wauwe J, et al. Liarozole, an inhibitor of retinoic acid metabolism, exerts retinoid-mimetic effects in vivo. J Pharmacol Exp Ther. 1992;261(2):773-779.  [Content Brief]

  [6]. Stearns ME, et al. Liarozole and 13-cis-retinoic acid anti-prostatic tumor activity [published correction appears in Cancer Res 1993 Dec 1;53(23):5831]. Cancer Res. 1993;53(13):3073-3077.  [Content Brief]