Abstract 3811
Background
LUR is a new agent that exerts antitumor activity through inhibition of trans-activated transcription and modulation of tumor microenvironment. Preclinical synergism/additivity in combination with IRI has been reported, thus prompting the conduct of this trial.
Methods
Phase I trial to evaluate escalating doses of LUR on Day (D) 1 plus a fixed dose of IRI 75 mg/m2 on D1 and D8 every 3 weeks (q3w) in pts with advanced solid tumors, enrolled following a standard 3 + 3 dose escalation design.
Results
39 pts were treated at 5 dose levels (DL); 13 at the recommended dose (RD). 56% were females, 69% had ECOG PS = 1; median age was 58 years; median of 2 prior chemotherapy lines for advanced disease (range, 0 − 4) per pt. RD was defined as LUR 2.0 mg/m2 on D1 + IRI 75 mg/m2 on D1 and D8 q3w + GCSF. Dose-limiting toxicities in Cycle 1 were observed in 2/3 evaluable pts at the maximum tolerated dose (MTD) and in 3/13 evaluable pts at the RD. At the MTD and the RD, DLTs were skipping IRI D8 doses due to grade (G) 3-4 neutropenia (n = 3 patients) or G2-4 thrombocytopenia (n = 2). At the RD common G1/2 toxicities were nausea, vomiting, fatigue, diarrhea, anorexia and neuropathy; G3/4 hematological abnormalities comprised neutropenia (33%), but no thrombocytopenia. Objective RECIST responses were documented in 6/34 evaluable pts (18%): 3/11 pts with small cell lung cancer (SCLC), 2/2 pts with endometrial carcinoma (EC) and 1/3 pts with glioblastoma (GB). Most responses (5/12 evaluable patients [42%]) were at the RD. One pt with EC has an ongoing PR after 20 cycles. Prolonged SD > 4 months were observed in pancreatic carcinoma (3/6 pts), soft tissue sarcoma (STS) (5/9 pts) and SCLC (6/11, including 4 with SD for 6, 9, 11 and 26+ months).
Conclusions
The combination of LUR and IRI is well tolerated, with no unexpected toxicities. Myelosuppression was dose-limiting, but predictable and manageable. The RD is LUR 2.0 mg/m2 on D1 + IRI 75 mg/m2 on D1 and D8 q3w with GCSF. Notable antitumor activity was observed, especially in SCLC, EC, GB and STS. Expansion in these indications is warranted.
Clinical trial identification
NCT02611024.
Editorial acknowledgement
Legal entity responsible for the study
PharmaMar SA.
Funding
PharmaMar.
Disclosure
S. Ponce Aix: Advisory / Consultancy: Roche; Speaker Bureau / Expert testimony: Roche, BMS, MSD. G. Coté: Advisory / Consultancy: Agios; Research grant / Funding (institution), Research funding to my institution for the conduct of clinical trials; no salary support: Epizyme, Eisai, Macrogenics, Boston Biomedical, Plexxicon, Merck KGaA/EMD Serono Research and Development Institute, CBA Inc, Bayer. R. Nuñez: Shareholder / Stockholder / Stock options, Full / Part-time employment: PharmaMar. M. Siguero: Shareholder / Stockholder / Stock options, Full / Part-time employment: PharmaMar. M. Insa: Full / Part-time employment: PharmaMar. M. Cullell-Young: Shareholder / Stockholder / Stock options, Full / Part-time employment: PharmaMar. C. Kahatt: Shareholder / Stockholder / Stock options, Full / Part-time employment: PharmaMar. A. Zeaiter: Shareholder / Stockholder / Stock options, Full / Part-time employment: PharmaMar. L. Paz-Ares: Advisory / Consultancy: Amgen; AstraZeneca; Boehringer Ingelheim; Bristol-Myers Squibb; Clovis Oncology; MSD; Novartis; Pfizer; Roche; Takeda. All other authors have declared no conflicts of interest.
Resources from the same session
3930 - Safety profile of tepotinib in patients with advanced solid tumors: pooled analysis of phase I and II data
Presenter: Thomas Decaens
Session: Poster Display session 1
Resources:
Abstract
5373 - Drug-drug interaction profile of tepotinib with CYP3A and P-gp substrates
Presenter: Juergen Heuer
Session: Poster Display session 1
Resources:
Abstract
5455 - Bioavailability of tepotinib: impact of omeprazole and food
Presenter: Juergen Heuer
Session: Poster Display session 1
Resources:
Abstract
2618 - Tislelizumab Exposure-Response Analyses of Efficacy and Safety in Patients with Advanced Tumors
Presenter: Chi-Yuan Wu
Session: Poster Display session 1
Resources:
Abstract
2563 - Population Pharmacokinetics of Tislelizumab in Patients with Advanced Tumors
Presenter: Chi-Yuan Wu
Session: Poster Display session 1
Resources:
Abstract
2021 - The Addition of Metformin to Systemic Anticancer Therapy
Presenter: Jung Han Kim
Session: Poster Display session 1
Resources:
Abstract
5243 - Growth modulation index (GMI) as a comparative measure of clinical activity of larotrectinib versus prior systemic treatments in adult and pediatric TRK fusion cancer patients
Presenter: Antoine Italiano
Session: Poster Display session 1
Resources:
Abstract
598 - Analysis of the overall survival and main surrogates used for FDA approvals in solid and hematological malignancies.
Presenter: Maria Kleniewska-Wieczor
Session: Poster Display session 1
Resources:
Abstract
5381 - Comparison of intratumoral docetaxel exposure in cancer patients between nanoparticle entrapped docetaxel (CPC634) and conventional docetaxel (Cd): the CriTax study
Presenter: Ruben Van Eerden
Session: Poster Display session 1
Resources:
Abstract
2935 - Correlation of progression free survival-2 and overall survival in solid tumors
Presenter: Paul Mainwaring
Session: Poster Display session 1
Resources:
Abstract