In vitro: Fadrozole hydrochloride is a very potent inhibitor of both human placental and rat ovarian aromatase. In hamster ovarian slices, fadrozole hydrochloride inhibits the production of estrogen with an IC50 of 0.03 μM. The production of progesterone is inhibited with an IC50 of 120 μM. Synthesis of other cytochrome P-450 dependent steroids can be suppressed to various degrees with higher doses of fadrozole hydrochloride.
In vivo: Fadrozole hydrochloride is able to inhibit the aromatase-mediated androstenedione-induced uterine hypertrophy in immature female rats with an ED50 of 0.03 mg/kg when given orally. In the same model, aminoglutethimide elicits the same effect with an ED50 of 30 mg/kg when given orally. Fadrozole hydrochloride prevents the development of both benign and malignant spontaneus mammary neoplasns in female Sprague-Dawley rats. It also slows the spontaneous development of ptuitary pars dta mas in female rats, and reduces the of spontaneous hcu ar tumours in male and female rats. Administration of fadrozole in male and female mice suppresses the production of 17b-estradiol, accompanied with a 70% reduction in parasite burden. This protective effect is associated in male mice with a recovery of the specific cellular immune response. Interleukin-6 (IL-6) serum levels, and its production by splenocytes, is augmented by 80%, together with a 10-fold increase in its expression in testes of infected male mice. Fadrozole treatment returns these levels to baseline values.
| Cell Experiment | |
|---|---|
| Cell lines | |
| Preparation method | |
| Concentrations | |
| Incubation time | |
| Animal Experiment | |
|---|---|
| Animal models | Rats |
| Formulation | water |
| Dosages | 0, 0.05, 0.25 or 1.25 mg/kg |
| Administration | oral gavage |
| Molecular Weight | 223.27 |
| Formula | C14H13N3 |
| CAS Number | 102676-47-1 |
| Form | Solid |
| Solubility (25°C) | 100 mg/mL in DMSO |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
| Related Cytochrome P450 (e.g. CYP17) Products |
|---|
| Cytochrome P450 reductase
Cytochrome P450 reductase is a NADPH-cytochrome reductase. |
| 20-SOLA
20-SOLA is a water-soluble 20-HETE antagonist. |
| TS-011
TS-011 is a selective inhibitor of 20-hydroxyeicosatetraenoic acid (20-HETE) synthesis. |
| Dibromo-dodecenyl-methylsulfimide
Dibromo-dodecenyl-methylsulfimide is a selective inhibitor of 20-HETE synthesis and attenuates the vasodilatory response to sodium nitroprusside (SNP). |
| Abiraterone decanoate
Abiraterone decanoate is a novel, long-acting Abiraterone precursor compound that also exhibits high CYP17 cleavage enzyme inhibition selectivity for prostate cancer related studies. |
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