CGP-53153
目录号 : GC32422CGP-53153是甾体类的5alphareductase抑制剂,在大鼠和人前列腺组织中的IC50值分别为36nM。
Cas No.:149281-19-6
Sample solution is provided at 25 µL, 10mM.
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Animal experiment: | Rats: Adult male rats weighing 160-180 g at the start of the study are treated orally once daily for 14 consecutive days either with increasing doses of CGP-53153 (1, 3 and 10 mg/kg) or with 10 mg/kg finasteride in 20% HCD. Control rats are given 20% HCD. On the 14th treatment day, 4 h after the last application, the animals are randomized and rapidly killed. Trunk blood is collected in polystyrene tubes and serum obtained by centrifugation is stored at -20°C for hormone (T, DHT and rat-LH) determination at a later date. After decapitation, the following organs are excised and weighed after removal of adhering fat and connective tissue: ventral prostate, seminal vesicles, levator ani and bulbocavernosus muscle, testes, pituitary, adrenals, thyroid, thymus and liver[1]. |
References: [1]. H usler A, et al. CGP-53153: a new potent inhibitor of 5alpha-reductase. J Steroid Biochem Mol Biol. 1996 Feb;57(3-4):187-95. |
CGP-53153 is a steroidal inhibitor of 5 alpha reductase with IC50s of 36 and 262 nM in rat and human prostatic tissue, respectively.
CGP-53153 competitively inhibits rat microsomal 5 alpha reductase from prostate with an IC50 of 36 nM compared to the reference compound finasteride (IC50=11 nM). CGP 53153 is approximately one order of magnitude more potent in inhibiting rat compared to human 5 alpha reductase, with IC50 values of 36 and 262 nM, respectively
CGP-53153 can significantly reduce T-propionate-mediated prostate growth at oral doses of 0.01 mg/kg. CGP-53153 significantly reduces prostate weight at 3 and 10 mg/kg by 31% and 37%, respectively. Treatment for 12 weeks with both CGP-53153 reduces prostate volume by more than 70% in individual dogs. Neither body weight nor the weight of any organ tested is affected by CGP-53153[1].
[1]. H?usler A, et al. CGP-53153: a new potent inhibitor of 5alpha-reductase. J Steroid Biochem Mol Biol. 1996 Feb;57(3-4):187-95.
Cas No. | 149281-19-6 | SDF | |
Canonical SMILES | C[C@@]1([C@H]2C(NC(C)(C)C#N)=O)[C@](CC2)([H])[C@@](CC[C@](N3)([H])[C@@]4(C=CC3=O)C)([H])[C@]4([H])CC1 | ||
分子式 | C23H33N3O2 | 分子量 | 383.53 |
溶解度 | Soluble in DMSO | 储存条件 | Store at -20°C |
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1 mg | 5 mg | 10 mg | |
1 mM | 2.6074 mL | 13.0368 mL | 26.0736 mL |
5 mM | 0.5215 mL | 2.6074 mL | 5.2147 mL |
10 mM | 0.2607 mL | 1.3037 mL | 2.6074 mL |
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CGP 53153: a new potent inhibitor of 5alpha-reductase
J Steroid Biochem Mol Biol 1996 Feb;57(3-4):187-95.PMID:8645628DOI:10.1016/0960-0760(95)00260-x
CGP 53153 (N-2-(cyano-2-propyl)-3-oxo-4-aza-5alpha-androst-1-ene-17beta-carb oxamide) is a steroidal inhibitor of 5alpha-reductase, the enzyme which effects the conversion of testosterone (T) to 5alpha-dihydrotestosterone (DHT). In vitro, CGP 53153 competitively inhibited rat microsomal 5alpha-reductase from prostate by 50% (IC50) at a concentration of 36nM compared to the reference compound finasteride which inhibited 5alpha-reductase with an IC50 of 11 nM in the same system. In vivo, inhibition of 5alpha-reductase activity was characterized in three different test systems. Inhibition of 5alpha-reductase activity was first assessed in a standard test designed to compare directly the potency of different 5alpha-reductase inhibitors. This test assesses potency through the inhibition of prostate growth in juvenile castrate male rats treated with a standard dose of T-propionate (1 mg/kg, s.c.) and a 5alpha-reductase inhibitor administered orally at various doses for 4 days. CGP 53153 and finasteride significantly reduced T-propionate-mediated prostate growth by about 25% (ED25) compared to T-propionate-treated controls at oral doses of 0.01 and 0.1 mg/kg, respectively. Second, the effects on prostate weight were studied in normal adult male rats treated orally once daily for 14 days with 1, 3 and 10 mg/kg CGP 53153 and with 10 mg/kg finasteride. CGP 53153 significantly reduced prostate weight at 3 and 10 mg/kg by 31% and 37%, respectively, compared to vehicle-treated controls, whereas the dose of 10 mg/kg finasteride did not significantly reduce prostate weight. Third, the effects on prostate volume were studied in normal 6-9-year-old male dogs treated orally once daily with 5 mg/kg CGP 53153 and with 5 mg/kg finasteride for 12 weeks. Prostate volume was monitored with magnetic resonance imaging every 2 weeks beginning 6 weeks before start of the treatment with 5alpha-reductase inhibitors and ending after a recovery period of 8 weeks after termination of treatment. Treatment for 12 weeks with both CGP 53153 and finasteride was equally effective in reducing prostate volume by more than 70% in individual dogs. Anti-androgenic potency of CGP 53153 and finasteride was assessed in juvenile castrate male rats treated with DHT-propionate (1 mg/kg, s.c.) and a 5alpha-reductase inhibitor (p.o.) for 4 days. Neither CGP 53153 nor finasteride given at a dose of 10 mg/kg had any significant effect on DHT-propionate-mediated prostate growth, whereas the reference anti-androgen flutamide given at a dose of 10 mg/kg reduced prostate weight to levels comparable to those seen in untreated castrate animals. For CGP 53153, the dose of 10 mg/kg is 1000-fold higher than the ED25 for 5alpha-reductase inhibition in vivo. In conclusion, both CGP 53153 and finasteride are potent inhibitors of the rat 5alpha-reductase enzyme system in vitro without showing any anti-androgenic effects in vivo. Both CGP 53153 and finasteride were equally potent in reducing prostate volume in aged male dogs, whereas in rats, CGP 53153 is up to 10 times more potent than finasteride in reducing prostate weight as shown in two different rat models.