E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
High-risk biochemically-relapsed prostate adenocarcinoma following radical prostatectomy. |
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E.1.1.1 | Medical condition in easily understood language |
High-risk biochemically-relapsed prostate adenocarcinoma following radical prostatectomy. |
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E.1.1.2 | Therapeutic area | Diseases [C] - Cancer [C04] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 20.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10060862 |
E.1.2 | Term | Prostate cancer |
E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To evaluate the clinical benefit of adding the androgen receptor competitive inhibitor apalutamide in combination with a Luteinizing Hormone Releasing Hormone (LHRH) agonist concomitantly to salvage radiotherapy (SRT) after biochemical progression following radical prostatectomy in patients with high-risk prostate adenocarcinoma. The clinical benefit will be evaluated using the progression-free survival (PFS) rate at 5 years. |
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E.2.2 | Secondary objectives of the trial |
1. To evaluate the prostate-cancer specific survival rate
2. To evaluate the overall survival rate at 10 years
3. To evaluate the biochemical relapse rate
4. To evaluate the time to castration resistant prostate cancer
5. To evaluate safety
6. To assess patients’ quality of life |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. Patients must have signed a written informed consent form prior to any trial specific procedures
2. Age ≥ 18 years old and ≤ 80 years old
3. Histologically confirmed diagnosis of prostate adenocarcinoma treated primarily with radical prostatectomy
4. Pathologically proven to be lymph node negative by pelvic lymphadenectomy (N0) or lymph node status pathologically unknown (undissected pelvic lymph nodes [Nx])
5. Tumor stage pT2, pT3 or pT4* (*only in case of bladder neck involvement)
6. Patients should have no clinical and radiological signs (18FCH-PET CT-scan or 68Ga-PSMA-PET) of metastatic disease. Patients with a local relapse detected on PET scan be randomized
7. ECOG performance status ≤ 1
8. PSA ≤ 0.1 ng/mL after radical prostatectomy (dosage performed within 3 months after surgery)
9. PSA ≥ 0.2 ng/mL and ≤ 2 ng/mL at the time of randomization with an elevation of PSA over three consecutive assays
10. At least 6 months between radical prostatectomy and biochemical relapse
11. High-risk features as defined by at least one of these characteristics: PSA at relapse > 0.5 ng/mL or Gleason score > 7 or tumor stage pT3b or resection margins R0 or PSA doubling time ≤ 6 months
12. Adequate renal function: serum creatinine < 1.5 x upper limit of normal (ULN) or a calculated corrected creatinine clearance ≥ 60 mL/min according to the Cockcroft-Gault formula, creatinemia < 2 ULN
13. Adequate hepatic function: total bilirubin ≤ 1.5 x ULN (unless documented Gilbert’s syndrome), AST and ALT ≤ 2.5 x ULN
14. Patients with female partners of reproductive potential should agree to use effective contraceptive method during treatement period and for 3 months after the last dose of apalutamide or for 6 months after the last fraction of radiotherapy
15. Patients must be willing and able to comply with the protocol for the duration of the study including undergoing treatment and scheduled visits and examinations
16. Patients must be affiliated to the Social Security System |
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E.4 | Principal exclusion criteria |
1. Histologically proven lymph nodes involvement at initial lymphadenectomy: pN1,pN2, pN3
2. Previous treatment with hormone therapy for prostate cancer
3. Histology other than adenocarcinoma
4. Surgical or chemical castration
5. Other malignancy except adequately treated basal cell carcinoma of the skin or other malignancy from which the patient has been cured for at least 5 years
6. Previous pelvic radiotherapy
7. History of Inflammatory bowel disease or any malabsorption syndrome or conditions that would interfere with enteral absorption
8. Uncontrolled hypertension (defined as systolic blood pressure (BP) ≥ 140 mmHg or diastolic BP ≥ 90 mmHg). Patients with a history of hypertension are allowed provided blood pressure is controlled by anti-hypertensive treatment
9. Clinically significant history of liver disease consistent with Child-Pugh class B or C
10. History of seizure or condition that may pre-dispose to seizure (including, but not limited to prior stroke, transient ischemic attack or loss of consciousness ≤ 1 year prior to randomization; brain arteriovenous malformation or intracranial masses such as schwannomas and meningiomas that are causing edema or mass effect)
11. Medications known to lower the seizure threshold must be discontinued or substituted at least 4 weeks prior to study entry
12. Severe or unstable angina, myocardial infarction, symptomatic congestive heart failure, arterial or venous thromboembolic events (e.g pulmonary embolism, cerebrovascular accident including transient ischemic attacks) or clinically significant ventricular arrhythmias within 6 months prior to randomization
13. Known hypersensitivity to apalutamide or to any of its components
14. Galactosemia, Glucose-galactose malabsorption or lactase deficiency
15. Inability or willingness to swallow oral medication
16. Individual deprived of liberty or placed under the authority of a tutor
17. Patients already included in another therapeutic trial with an experimental drug or having been given an experimental drug within the 30 days before inclusion |
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E.5 End points |
E.5.1 | Primary end point(s) |
The primary endpoint is the 5-year-progression free survival (PFS).
PFS is defined as the time from the date of randomization to the date of first evidence of loco-regional recurrences, or distant metastases, or death from any cause whichever occurs first, or the date of last known follow-up alive without any such events.
Evidence of loco-regional recurrences is evaluated on PET CT (18FCH-PET CT-scan or 68Ga-PSMA PET)
Evidence of distant metastases is evaluated on PET CT (18FCH-PET CT-scan or 68Ga- PSMA PET)
Relapse at a distant metastatic site is defined as the occurrence of PET CT defined bone or soft tissue distant metastasis. |
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E.5.2 | Secondary end point(s) |
Efficacy:
1. Cancer-specific overall survival is defined as the time from the date of randomization to the date of death related to prostate cancer or the date of last known follow-up alive.
2. Overall survival (OS) will be assessed at 10 years. OS is defined as the time from the date of randomization to the date of death from any cause or the date of last known follow-up alive.
3. Biochemical relapse-free survival will be retrospectively defined by the interval between the date of randomization and the date of the first PSA elevation following the 6-months treatment in both arms (PSA ≥ 0.5 ng/mL confirmed by two consecutive PSA increases over a 2-months interval).
If no biochemical relapse is observed, the PSA concentration will be measured every 6 months for 5 years and every year thereafter.
In order to compare PSA values, PSA assays must always be performed for each patient in the same laboratory.
Following biochemical relapse, clinical staging (18FCH-PET CT-scan or 68Ga-PSMA PET) will be repeated every 6 months until local or metastatic progression is detected.
4. The time to castration resistance is defined as the time from the date of randomization to the date of appearance of castration resistance defined in the EAU guidelines (Cornford Eur Urol 2017). Castration-resistant prostate cancer (CRPC) is defined as castrate serum testosterone <50 ng/dl or 1.7 nmol/l plus one of the following types of progression:
- Biochemical progression: Three consecutive rises in PSA 1 wk apart, resulting in two 50% increases over the nadir, and PSA >2 ng/ml
- Radiologic progression: The appearance of new lesions: either two or more new bone lesions on bone scan or a soft tissue lesion using the Response Evaluation Criteria in Solid Tumours
Safety:
Frequency, nature and severity of adverses events will be assessed according to the NCI CTCAE version 5.0 (see Appendix 4)
Acute toxicity related to radiotherapy is defined as occurring during radiotherapy and up to 3 months after completion of radiotherapy.
Late toxicity related to radiotherapy is defined as occurring later than 3 months after end of radiotherapy.
The tolerance will be evaluated up until 10 years.
Patient-reported outcomes:
Quality of life will be assessed at baseline, at end of SRT, at end of treatment visit and at every follow up visit until disease progression by using:
- EORTC QLQ-C30 questionnaire
- EORTC QLQ-PR25 questionnaire
- IIEF-5 questionnaire
- IADL scale for patients ≥ 75 years old |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | Yes |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | Yes |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | Yes |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | Yes |
E.8.2.3.1 | Comparator description |
Salvage Radiotherapy + 6-months of LHRH agonist |
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E.8.2.4 | Number of treatment arms in the trial | 2 |
E.8.3 |
The trial involves single site in the Member State concerned
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.4.1 | Number of sites anticipated in Member State concerned | 20 |
E.8.5 | The trial involves multiple Member States | No |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | No |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.7 | Trial has a data monitoring committee | No |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 14 |
E.8.9.1 | In the Member State concerned months | |
E.8.9.1 | In the Member State concerned days | |
E.8.9.2 | In all countries concerned by the trial years | 14 |