Phase I/II Study of ASP9521 in Castrate-Resistant Prostate Cancer (CRPC) Patients

Astellas

Status and phase

Terminated

Phase 2

Phase 1

Conditions

Castrate Resistant Prostate Cancer

Treatments

Drug: ASP9521

Study type

Interventional

Funder types

Industry

Identifiers

NCT01352208

2010-023382-22 (EudraCT Number)

9521-CL-0002

Details and patient eligibility

About

The study has three parts. Part 1 is a dose escalation to investigate the safety and tolerability of ASP9521. Part 2 will evaluate the safety and tolerability and initial anti-tumor activity of ASP9521. Part 3 of the study will be a Food Effect study.

Full description

The purpose of the first study part is to investigate the safety and tolerability of ASP9521 in patients with Castrate Resistant Prostate Cancer. This will be done at different doses, starting at the lowest dose up to higher doses to find the maximum dose that is tolerated.

The second part will investigate the safety and tolerability and evaluate initial anti-tumor activity of ASP9521. This will be done at multiple doses which are identified in part 1 to potentially be effective. The number of patients in part 2 will be higher number compared to part I.

The third part of the study will investigate the effect of food on the drug in patients; this will be a crossover design fed to fasted and vice versa.

Enrollment

13 patients

Sex

Male

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Histologically confirmed adenocarcinoma of the prostate without neuroendocrine differentiation or small cell features
Metastatic disease documented by 2 or more bone lesions on bone scan or by soft tissue disease observed by Computed tomography/Magnetic resonance imaging (CT/MRI)
Ongoing androgen deprivation with Luteinizing hormone-releasing hormone (LHRH) agonist/antagonist therapy or bilateral orchiectomy. For patients who have not had an orchiectomy, there must be a plan to maintain effective LHRH agonist/antagonist therapy for the duration of the study
Serum testosterone <1.7 nmol/L (50 ng/dL) at screening
Patients receiving bisphosphonates or other approved bone targeting therapy must have been on stable doses for at least 4 weeks prior to screening
Progressive disease at study entry defined as one or more of the following 3 criteria occurring in the setting of castrate levels of testosterone:
- Prostate-specific antigen (PSA) progression defined by a minimum of 2 rising PSA levels with an interval of >1 week between each determination. The PSA value at screening should be >2 ng/mL
- Soft tissue disease progression defined by Response Evaluation Criteria in Solid Tumors (RECIST). Measurable disease is not required for entry. Lymph nodes >20 mm are considered measurable disease
- Bone disease progression defined by at least 2 new lesions on bone scan
Life expectancy of >6 months according to the investigator's judgment
Chemotherapy-Naïve patients should be asymptomatic or controlled symptomatic patients with metastatic CRPC who have failed one or more lines of hormonal treatment/androgen deprivation therapy but have not received chemotherapy or have refused chemotherapy. Post chemotherapy patients should have received not more than two prior regimens of chemotherapy for prostate cancer, of which one is docetaxel-based

Exclusion criteria

Concomitant treatment with the following is prohibited:
- All biologic agents (except for sipuleucel T [Provenge®]), or other agents with anti-tumor activity against prostate cancer, including 5 alpha reductase inhibitors, androgens (e.g., testosterone), cytoproterone acetate and all other progestational agents, estrogens, and flutamide within 4 weeks prior to screening
- Bicalutamide or nilutamide within 6 weeks prior to screening
- Treatment with estramustine
- Ketoconazole for treatment of prostate cancer
- Treatment with abiraterone
Radiation therapy for treatment of the prostate within 3 months prior to screening
Radiation therapy for the treatment of metastases within 3 weeks (if single fraction of radiotherapy then within 2 weeks) and radionuclide therapy for the treatment of metastases within 4 weeks prior to screening
Major surgery within 2 months prior to screening
Known or suspected intracerebral disease or brain metastasis
Use of an investigational agent within 4 weeks prior to treatment allocation or a period required by local regulation, whichever is longer
Prior use, or participation in a clinical study, of an investigational agent that blocks androgen synthesis or targets the androgen receptor