Abstract 1423
Background
In the PALOMA-3 trial, palbociclib plus fulvestrant demonstrated a clinically meaningful improvement in overall survival compared with fulvestrant plus placebo in patients (pts) with hormone receptor-positive (HR+), HER2-negative (HER2-) metastatic breast cancer who had relapsed or progressed on prior endocrine therapy (Turner NC et al., NEJM 2018). Detailed analyses for first-line (1L) and second- or later- line (2L+) therapy are still limited.
Methods
The prospective, multicenter phase 2 INGE-B trial was designed to generate efficacy and safety data on the combination of palbociclib with letrozole (1L) or fulvestrant (1L, 2L+) in accordance with the PALOMA trials and to generate so far lacking trial data on the combination of palbociclib with anastrozole (1L), exemestane (1L) or letrozole (2L+). This pre-planned interim analysis was conducted to evaluate data on pts receiving palbociclib plus fulvestrant as 1L or 2L+ therapy. The primary endpoint was the clinical benefit rate (CBR) in pts with measurable disease according to RECIST v1.1. Key secondary endpoints included the overall response rate (ORR), the CBR for all pts, and safety. Data were analyzed with descriptive statistics.
Results
At the cut-off date of the interim analysis (Dec 17, 2018), 124 pts have been recruited from 03/2017 through 06/2018 at 47 sites across Germany to receive palbociclib plus fulvestrant (1L: 57 pts; 2L+: 67 pts). 57 of 67 pts treated in 2L+ were evaluable. Median age was 68.0 years, 91.2% (n = 52) of pts had an ECOG performance score of 0 or 1. 28.1% (n = 16) of pts presented with non-measurable bone-only disease. The CBR was 35% (n = 14) for the 40 pts with measurable disease (RECIST v1.1) and 51% (n = 29) for all pts (investigator assessment). The ORRs were 25% (n = 10) and 21% (n = 12), respectively. Grade 3/4 adverse events experienced by at least 10% of pts were neutropenia (n = 21, 36.8%) and leukopenia (n = 7, 12.3%).
Conclusions
This INGE-B interim analysis showed a remarkable clinical benefit for palbociclib plus fulvestrant as second- or later-line therapy for pts with HR+/HER2- advanced breast cancer. No new safety signals were detected.
Clinical trial identification
2015-001603-32.
Editorial acknowledgement
Legal entity responsible for the study
iOMEDICO AG.
Funding
Pfizer Pharma GmbH.
Disclosure
D. Lüftner: Advisory / Consultancy, Research grant / Funding (institution): Amgen; Advisory / Consultancy: Eli Lilly; Advisory / Consultancy: Celgene; Advisory / Consultancy, Research grant / Funding (institution): Novartis; Advisory / Consultancy: Pfizer; Advisory / Consultancy: Teva; Advisory / Consultancy: Tesaro; Advisory / Consultancy: L’Oréal; Advisory / Consultancy: MSD; Advisory / Consultancy: AstraZeneca. M.K. Welslau: Honoraria (self), Advisory / Consultancy: Amgen; Advisory / Consultancy: Bristol-Myers Squibb; Honoraria (self), Advisory / Consultancy: Celgene; Honoraria (self), Advisory / Consultancy: GILEAD; Honoraria (self), Advisory / Consultancy: HEXAL; Honoraria (self), Advisory / Consultancy: Janssen; Honoraria (self), Advisory / Consultancy: Eli Lilly; Advisory / Consultancy: Medac; Honoraria (self), Advisory / Consultancy: Novartis; Honoraria (self), Advisory / Consultancy: Roche; Honoraria (self), Advisory / Consultancy: Sanofi; Honoraria (self): Astellas; Honoraria (self): AstraZeneca. A. Welt: Advisory / Consultancy: Roche; Advisory / Consultancy, Research grant / Funding (institution): Novartis; Advisory / Consultancy: AstraZeneca; Advisory / Consultancy: Eli Lilly; Advisory / Consultancy: Eisai; Advisory / Consultancy: Pfizer; Advisory / Consultancy: Amgen. M. Zaiss: Advisory / Consultancy: Roche; Advisory / Consultancy: Pfizer; Advisory / Consultancy: Celgene; Advisory / Consultancy: Janssen; Advisory / Consultancy: Novartis. N.W. Marschner: Leadership role, Shareholder / Stockholder / Stock options: iOMEDICO AG; Research grant / Funding (institution): Pfizer. All other authors have declared no conflicts of interest.
Resources from the same session
5124 - STAR_PAC: Phase I clinical trial repurposing all trans retinoic acid (ATRA) as stromal targeting agent in a novel drug combination for pancreatic cancer.
Presenter: Hemant Kocher
Session: Poster Display session 2
Resources:
Abstract
5257 - Outcomes of First Line FOLFIRINOX (FFX) Versus Gemcitabine and Nab-Paclitaxel (GN) in Patients with Advanced Pancreatic Cancer: Multi-Institutional Canadian Sites Experience
Presenter: Neha Papneja
Session: Poster Display session 2
Resources:
Abstract
1166 - Effect of prior cancer on survival outcomes for patients with pancreatic adenocarcinoma
Presenter: Chaobin He
Session: Poster Display session 2
Resources:
Abstract
1169 - Association of combination of irreversible electroporation ablation and chemotherapy with outcomes of locally advanced pancreatic cancer: a large cohort study
Presenter: Chaobin He
Session: Poster Display session 2
Resources:
Abstract
1222 - Results from phase I study of the oncolytic viral immunotherapy agent Canerpaturev (C-REV) in combination with gemcitabine plus nab-paclitaxel as first-line treatment of unresectable pancreatic cancer
Presenter: Yusuke Hashimoto
Session: Poster Display session 2
Resources:
Abstract
1698 - Multicenter retrospective study of gemcitabine plus nab-paclitaxel for elderly patients with advanced pancreatic cancer
Presenter: Masato Ozaka
Session: Poster Display session 2
Resources:
Abstract
2424 - Irinotecan Combined with Oxaliplatin and S1 in Patients with Metastatic Pancreatic Adenocarcinoma
Presenter: Keke Nie
Session: Poster Display session 2
Resources:
Abstract
2885 - Cancer-associated thrombosis in patients with pancreatic cancer and its correlation with plasma tissue factor level: A Japanese prospective cohort study
Presenter: Satoshi Kobayashi
Session: Poster Display session 2
Resources:
Abstract
3702 - A Phase I/Ib, multi-center trial of ARQ-761 (Beta-Lapachone) with gemcitabine/nab-Paclitaxel in patients with advanced pancreatic cancer
Presenter: Muhammad Beg
Session: Poster Display session 2
Resources:
Abstract
5185 - Systemic administration of the hyaluronidase-expressing oncolytic adenovirus VCN-01 in patients with advanced or metastatic pancreatic cancer: first-in-human clinical trial
Presenter: Rocio Garcia-Carbonero
Session: Poster Display session 2
Resources:
Abstract