Clinical trial · Interventional
A Study of Palbociclib (PD-0332991) + Letrozole vs. Letrozole For 1st Line Treatment Of Postmenopausal Women With ER+/HER2- Advanced Breast Cancer (PALOMA-2)
A RANDOMIZED, MULTICENTER, DOUBLE-BLIND PHASE 3 STUDY OF PD-0332991 (ORAL CDK 4/6 INHIBITOR) PLUS LETROZOLE VERSUS PLACEBO PLUS LETROZOLE FOR THE TREATMENT OF POSTMENOPAUSAL WOMEN WITH ER (+), HER2 (-) BREAST CANCER WHO HAVE NOT RECEIVED ANY PRIOR SYSTEMIC ANTI CANCER TREATMENT FOR ADVANCED DISEASE
NCT01740427CI-TRIAL-00082514completedPhase 3Results postedClinicalTrials.gov clinicaltrialsProvenance
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
The study is designed to compare the clinical benefit following treatment with letrozole in combination with PD-0332991 versus letrozole in combination with placebo in postmenopausal women with ER(+)/HER2(-) advanced breast cancer who have not received prior systemic anti cancer therapies for their advanced/metastatic disease.
Conditions
Conditions (1)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Breast Neoplasms | Breast Neoplasm | ONTOLOGY_EXACT | 0.98 |
Interventions
Interventions (3)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Letrozole | Drug | Letrozole | ALIAS |
| PD-0332991 | Drug | Palbociclib | ALIAS |
| Placebo | Drug | — | UNRESOLVED |
Design
Arms and outcomes
Arms (2)
- type
- EXPERIMENTAL
- label
- PD-0332991 + Letrozole
- description
- PD-0332991, 125mg, orally once daily on Day 1 to Day 21 of every 28-day cycle followed by 7 days off treatment in combination with Letrozole, 2.5mg, orally once daily (continuously).
- interventionNames
- Drug: PD-0332991
- Drug: Letrozole
- type
- ACTIVE_COMPARATOR
- label
- Placebo + Letrozole
- description
- Placebo, 125mg, orally once daily on Day 1 to Day 21 of every 28-day cycle followed by 7 days off treatment in combination with Letrozole, 2.5mg, orally once daily (continuously).
- interventionNames
- Drug: Placebo
- Drug: Letrozole
Primary outcomes (1)
- measure
Eligibility
Eligibility (as posted)
- Sex
- Female
- Minimum age
- 18 Years
Show eligibility criteria text
Inclusion Criteria: * Adult women with locoregionally recurrent or metastatic disease not amenable to curative therapy. * Confirmed diagnosis of ER positive breast cancer * No prior systemic anti-cancer therapy for advanced ER+ disease. * Postmenopausal women * Measurable disease as per Response Evaluation Criterion in Solid Tumors \[RECIST\] or bone-only disease * Eastern Cooperative Oncology Group \[ECOG\] 0-2 * Adequate organ and marrow function * Patient must agree to provide tumor tissue Exclusion Criteria: * Confirmed diagnosis of HER2 positive disease * Patients with advanced, symptomatic, visceral spread that are at risk of life threatening complication in the short term * Known uncontrolled or symptomatic CNS metastases * Prior (neo)adjuvant treatment with letrozole or anastrozole with DFI ≤ 12-months from completion of treatment. * Prior treatment with any CDK 4/6 inhibitor.
References
Publications (25)
- DERIVEDCheang MCU, Rimawi M, Johnston S, Jacobs SA, Bliss J, Pogue-Geile K, Kilburn L, Zhu Z, Schuster EF, Xiao H, Swaim L, Deng S, Lu DR, Gauthier E, Tursi J, Slamon DJ, Rugo HS, Finn RS, Liu Y. Effect of cross-platform gene-expression, computational methods on breast cancer subtyping in PALOMA-2 and PALLET studies. NPJ Breast Cancer. 2024 Jun 29;10(1):54. doi: 10.1038/s41523-024-00658-y. PMID 38951507
- DERIVEDLi H, Wu Y, Zou H, Koner S, Plichta JK, Tolaney SM, Zhang J, He YW, Wei Q, Tang L, Zhang H, Zhang B, Guo Y, Chen X, Li K, Lian L, Ma F, Luo S. Clinical efficacy of CDK4/6 inhibitor plus endocrine therapy in HR-positive/HER2-0 and HER2-low-positive metastatic breast cancer: a secondary analysis of PALOMA-2 and PALOMA-3 trials. EBioMedicine. 2024 Jul;105:105186. doi: 10.1016/j.ebiom.2024.105186. Epub 2024 Jun 10. PMID 38861871
- DERIVEDSlamon DJ, Dieras V, Rugo HS, Harbeck N, Im SA, Gelmon KA, Lipatov ON, Walshe JM, Martin M, Chavez-MacGregor M, Bananis E, Gauthier E, Lu DR, Kim S, Finn RS. Overall Survival With Palbociclib Plus Letrozole in Advanced Breast Cancer. J Clin Oncol. 2024 Mar 20;42(9):994-1000. doi: 10.1200/JCO.23.00137. Epub 2024 Jan 22. PMID 38252901
- DERIVEDJhaveri K, O'Shaughnessy J, Fasching PA, Tolaney SM, Yardley DA, Sharma VK, Biswas C, Thuerigen A, Pathak P, Rugo HS. Matching-adjusted indirect comparison of PFS and OS comparing ribociclib plus letrozole versus palbociclib plus letrozole as first-line treatment of HR+/HER2- advanced breast cancer. Ther Adv Med Oncol. 2023 Dec 14;15:17588359231216095. doi: 10.1177/17588359231216095. eCollection 2023. PMID 38107828
- DERIVEDRugo HS, Im SA, Joy AA, Shparyk Y, Walshe JM, Sleckman B, Loi S, Theall KP, Kim S, Huang X, Bananis E, Mahtani R, Finn RS, Dieras V. Effect of palbociclib plus endocrine therapy on time to chemotherapy across subgroups of patients with hormone receptor-positive/human epidermal growth factor receptor 2-negative advanced breast cancer: Post hoc analyses from PALOMA-2 and PALOMA-3. Breast. 2022 Dec;66:324-331. doi: 10.1016/j.breast.2022.11.005. Epub 2022 Nov 15.