E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Histological confirmed endometrial cancer of endometrioid type. Mixed tumor histology is allowed if the non-endometrioid component is less than 5%. Tumour must be estrogen receptor positive. |
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E.1.1.1 | Medical condition in easily understood language |
Patients with advanced endometrial cancer |
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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 | 21.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10014741 |
E.1.2 | Term | Endometrial cancer stage IV |
E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 21.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10014733 |
E.1.2 | Term | Endometrial cancer |
E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 21.1 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10014734 |
E.1.2 | Term | Endometrial cancer metastatic |
E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 21.0 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10014735 |
E.1.2 | Term | Endometrial cancer NOS |
E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 21.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10014736 |
E.1.2 | Term | Endometrial cancer recurrent |
E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 21.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10014740 |
E.1.2 | Term | Endometrial cancer stage III |
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 |
The overall objective is to obtain preliminary but not conclusive evidence of efficacy of palbociclib-letrozole combination in comparison to placebo-letrozole combination therapy in the treatment of ER+ advanced or relapsed endometrial cancer. The primary objective is therefore to prolong Progression-Free Survival (PFS). |
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E.2.2 | Secondary objectives of the trial |
To prolong PFS in sub-populations. To increase objective response rate (ORR). To increase disease control rate (DCR). To prolong time to first subsequent therapy (TFST). To prolong Progression-Free Survival 2 (PFS2). To prolong time to second subsequent therapy (TSST). To register Patient Reported Outcomes (PROs). To register safety and tolerability. To register overall survival (OS). To evaluate the prognostic and predictive values of tumour biomarkers for Cycline A regarding primary outcome. To analyse the correlation of PFS with retinoblastoma protein-expressing tumours. Other TR related objectives are to be added.
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. Histological confirmed endometrial cancer of endometrioid type. Mixed tumor histology is allowed if the non-endometrioid component is less than 5%. Tumour must be estrogen receptor positive. 2. Patients may have received adjuvant chemotherapy for stage 1 or 2. 3. Patients may have received any lines of chemotherapy for primary advanced (stage 3-4) or relapsed disease. 4. Patients may have received external beam radiotherapy, brachytherapy, and surgery. 5. Patient may have received maximum one line of endocrine therapy containing MPA/Megace only. Disease Status: 6. measureable disease or evaluable disease on CT scan according to RECIST 1.1 outside irradiated field. 7. Patients must give informed consent . 8. ECOG performance status (PS) of 0-1 (appendix 2). 9. Serum albumin ≥ 30g/l. 10. Adequate bone-marrow, renal and hepatic function: i. Hepatic function: total bilirubin within normal limits; ALT and AST ≤ 1.5 x ULN in patients without liver metastasis. For patients with liver metastasis: total bilirubin within normal limits, ALT or AST ≤ 2.5 x ULN. ii. Coagulation parameters: INR < 2 x ULN; activated partial thromboplastin time (APTT) < 1.5 x ULN in the absence of therapeutic anticoagulation . iii. Absolute neutrophil count (ANC) ≥ 1.5 x 109/L; platelets ≥ 100 x 109L; haemoglobin ≥ 9.0 g/dL. iv. Proteinuria < grade 2 (IB). v. Glomerular Filtration Rate (GFR) ≥40ml/min. (calculated using Cockroft & Gault equation, Jellife equation or measured by EDTA clearance). 11. Life expectancy of at least 12 weeks. 12. Patients must be fit to receive combination therapy . 13. Patient’s age >18 years. 14. Patient is post-menopausal (Patients under the age of 55 with intact ovaries shall undergo hormonal verification). 15. Patients with preserved reproductive capacity must have a negative pregnancy test (β-HCG test in urine or serum) prior to commencing study treatment.
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E.4 | Principal exclusion criteria |
1. Non-endometrioid adenocarcinomas, sarcomas, small cell carcinoma with neuroendocrine differentiation or non-epithelial cancers. 2. Previous anti-cancer endocrine therapy other than MPA/Megace. This means that eg. tamoxifen is not allowed prior to randomization. 3. Concurrent cancer therapy (the patient may receive a stable dose of corticosteroids during the course of the study, as long as this was started at least 4 weeks prior to randomization). 4. Previous treatment with Palbociclib or other CDK inhibitors. 5. Concurrent treatment with an investigational anticancer agent or participation in another anticancer clinical trial within 21 days prior to randomization. 6. Treatment within 21 days prior to randomization with any: • investigational drugs. • radiotherapy (Palliative radiotherapy may be permitted for symptomatic control of pain from bone metastases in extremities, provided that the radiotherapy does not involve target lesions, and the reason for the radiotherapy does not reflect progressive disease). • immunotherapy. • chemotherapy. • hormonal therapy. • biological therapy. 7. Major injuries or surgery within the past 21 days prior to randomization, with incomplete wound healing and/or planned surgery during the on-treatment study period. 8. Previous malignant disease, except patients with previous malignant disease, for which the patient has been disease-free for at least three years prior to randomization. 9. Concurrent other malignant disease, except for curatively treated carcinoma in situ of the cervix or basal cell carcinoma of the skin. 10. Active infection or other serious underlying medical condition, which might prevent the patient from receiving treatment or to be followed. 11. Evidence of significant medical illness, abnormal laboratory finding or psychiatric illness/social situation that would, according to the Investigator’s judgment, make the patient inappropriate for this study. 12. Known hypersensitivity to the trial drugs, or to their excipients. 13. History of major thromboembolic event defined as: • Uncontrolled pulmonary embolism, defined as pulmonary embolism within 6 months prior to enrolment and/or recurrent pulmonary embolism (history of at least 2 events). • Deep venous thrombosis, though patients with stable therapeutic anticoagulation for more than three months prior to randomization are eligible for this study. • Other related conditions, though patients with stable therapeutic anticoagulation for more than three months prior to randomization are eligible for this study. 14. History of a cerebral vascular accident, transient ischemic attack or subarachnoid hemorrhage within the past 3 months prior to randomization. 15. History of clinically significant hemorrhage in the past 3 months prior to randomization. 16. Uncontrolled and/or symptomatic CNS metastasis or leptomeningeal carcinomatosis (dexamethasone/prednisone therapy will be allowed if administered as stable dose for at least one month prior to randomization). 17. Significant cardiovascular diseases, including uncontrolled hypertension (hypertension not controlled by medical therapy), uncontrolled clinically relevant cardiac arrhythmia, unstable angina or myocardial infarction within 6 months prior to randomization, congestive heart failure > NYHA III (appendix 8), severe peripheral vascular disease, clinically significant pericardial effusion. 18. Pregnancy or breastfeeding. 19. Patients with preserved reproductive capacity, unwilling to use a medically acceptable method of non-hormonal contraception for the duration of the trial and for 3 months after ended treatment. 20. Known active or chronic hepatitis C and/or B infection and/or HIV infection. 21. Persistence of clinically relevant grade 3-4 therapy related toxicity from previous chemotherapy and/or radiotherapy. 22. Gastrointestinal disorders or abnormalities that would interfere with absorption of the study drug. 23. Unable or unwilling to swallow tablets/capsules 24. Patients unable to be regularly followed for any reason (geographic, familiar, social, phycologic, housed in an institution eg. prison because of a court agreement or administrative order). 25. Subjects who are dependent on the sponsor/CRO or investigational site or on the investigator in any way. |
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E.5 End points |
E.5.1 | Primary end point(s) |
PFS: time from date of randomization to date of progression or death. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
Analysis will be performed once 68 events are registered No interim analysis is planned |
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E.5.2 | Secondary end point(s) |
PFS of patients in sub-populations, as described under stratification factors. ORR according to Response Evaluation Criteria in Solid Tumours 1.1 (RECIST) (appendix 5).
DCR: Complete Response, Partial Response or Stable Disease (CR+PR+SD). DCR for at least 12 weeks.
TFST: time from randomization to first subsequent therapy or death. PFS2: time from randomization to second subsequent disease progression or death. TSST: time from randomization to second subsequent therapy or death. PROs, eg. via QoL scores (appendix 3 and 4). Safety and tolerability in the two treatment arms, eg. Via adverse event (AE) registration. Compliance in the two treatment arms, eg. via patient diary. OS: The percentage of people in each of the two treatment arms, who are still alive 3,5 years after randomization. PFS with or without retinoblastoma protein-expressing tumours
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
Only after the primary end-point is mature |
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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) | Yes |
E.7.3 | Therapeutic confirmatory (Phase III) | No |
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 | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
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 | Yes |
E.8.2.3 | Other | No |
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 | 5 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 31 |
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 | Yes |
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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End of Trial: 01.September 2026 After reaching events on Overall Survival (OS), we need 6-12 months to complete the Study Report, therefore LVLS is not equal to end of 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 | 9 |
E.8.9.1 | In the Member State concerned months | 6 |
E.8.9.1 | In the Member State concerned days | |
E.8.9.2 | In all countries concerned by the trial years | 9 |
E.8.9.2 | In all countries concerned by the trial months | 6 |