Relugolix (oral administration; 1-3 mg/kg; single dose for pharmacokinetic study) exhibits a good pharmacokinetic profile and obvious suppressive effects of circulating LH levels in monkeys at a dose of 1 mg/kg. The pharmacokinetic profile exhibits with 16.0 ng/mL, 2.7 h, and 90.1 ng for Cmax, Tmax, and AUCo, respectively in male cynomolgus monkeys.
Relugolix (oral administration; 3, 10 or 30 mg/kg; twice daily; 4 weeks) significantly decreases the testis weight, and reduces the ventral prostate weight at 3 mg/kg and decreases it to castrate levels at 10 mg/kg in male hGNRHR-knock-in mice.
Relugolix (oral administration; 30, 100 or 200 mg/kg; twice daily; 4 weeks) induces constant diestrous phases in all mice within the first week at 100 mg/kg, and significantly decreases the weights of ovaries and uteri at this dose after 4 weeks in female hGNRHR-knock-in mice.
Animal Model: |
Male hGNRHR-knock-in mice |
Dosage: |
3, 10 or 30 mg/kg |
Administration: |
Oral administration; 3, 10 or 30 mg/kg; twice daily; 4 weeks |
Result: |
Decreased testicular function. |
Animal Model: |
Female hGNRHR-knock-in mice |
Dosage: |
30, 100 or 200 mg/kg |
Administration: |
Oral administration; 30, 100 or 200 mg/kg; twice daily; 4 weeks |
Result: |
Suppressed the hypothalamic–pituitary–gonadal axis to gonadectomized levels. Downregulated GnRH receptor mRNA levels in the pituitary. |