This is an open-label, multicenter, dose escalation and expansion Phase 1 study of SHR7280 in adult patients with hormone sensitive prostate cancer.

Inclusion Criteria:

1. Ability to understand and the willingness to sign a written informed consent document；
2. Age ≥18 years old;
3. Histologically or cytologically confirmed prostate adenocarcinoma;
4. Candidate for androgen deprivation therapy (ADT) for the management of hormone-sensitive prostate cancer；
5. Appropriate serum testosterone and serum PSA concentration at screening as specified in the protocol；
6. Eastern Cooperative Oncology Group (ECOG) performance status 0 to 1;
7. Adequate organ performance based on laboratory blood tests;
8. Agree to use adequate contraception prior to study entry and for the duration of study participation.

Exclusion Criteria:

1. Previously received gonadotropin-releasing hormone analogues (GnRH-a) for more than 12 months total duration (if GnRH-a was received for 12 months or less, then that GnRH-a must have been completed washout period prior to the first dose of study drug).
2. Patients who have received chemotherapy for prostate cancer;
3. History of surgical castration;
4. Received Abiraterone acetate with 3 months prior to the first dose of study drug;
5. Receieved molecular target therapy, immunotherapy, androgen receptor blockade, 5-alpha reductase inhibitors, estrogen, and other investigational compound with 4 weeks prior to the first dose of study drug;
6. Patients with known or suspected brain metastasis；
7. Diagnosis or treatment for another systemic malignancy within 5 years before study treatment initiation;
8. Patients with uncontrolled and clinically significant hypertension and diabetes;
9. Known hypersensitivity to SHR7280, SHR7280 excipients,；
10. History of immunodeficiency (including HIV infection) or organ transplantation;
11. Known active hepatitis B or C infection;
12. Other serious accompanying illnesses, which, in the researcher's opinion, could seriously adversely affect the safety of the treatment.