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Phase Ib/II study of gemcitabine, nab-paclitaxel, and pembrolizumab in metastatic pancreatic adenocarcinoma

  • PHASE II STUDIES
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A Correction to this article was published on 24 April 2019

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Summary

Background A single center phase Ib/II study of gemcitabine, nab-paclitaxel, and pembrolizumab (GNP) to evaluate the safety and efficacy in metastatic pancreatic adenocarcinoma (PDAC) was conducted (NCT02331251). Methods PDAC patients (pts) with measurable disease, biopsy proven metastasis, adequate laboratory tests, and KPS ≥ 70% received GNP until progression or toxicity. Safety monitoring, RECIST 1.1, and irRECIST assessments were conducted. Response imaging was performed prior to cycle 4, then every 3 months. Changes in tumor cell-free DNA copy number instability (CNI) was retrospectively evaluated. Results 17 pts. with a median age of 56 were treated. 11 were women and all had a KPS of at least 80%. Grade 3 events occurred in 53% of patients. The phase II portion was completed for chemotherapy naïve PDAC pts. Of the 11 evaluable chemotherapy naïve PDAC, the disease control rate (partial response [PR] + stable disease[SD]) was 100%. There were 3 with PR on treatment for 8+, ~11, and 15 months; respectively. The primary endpoint of >15% complete response was not met. The median progression-free survival (PFS) and overall survival (OS) was 9.1 and 15.0 months for chemotherapy naïve treated patients. Of 9 patients evaluable for CNI change, a greater reduction in CNI correlated with longer PFS and improved OS. Conclusions GNP can be safely given to chemotherapy naïve PDAC patients. Efficacy appears to be slightly improved over previously reported results for standard weekly × 3 every 28 day gemcitabine and nab-paclitaxel dosing. CNI change may be prognostic for OS.

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Change history

  • 24 April 2019

    The authors would like to note an error in Figures��1 and 2 of this paper. The graph in Figure 1 incorrectly reflected the overall survival (OS), when it should have displayed the progression-free survival (PFS). The caption and median PFS values were correct.

  • 24 April 2019

    The authors would like to note an error in Figures��1 and 2 of this paper. The graph in Figure 1 incorrectly reflected the overall survival (OS), when it should have displayed the progression-free survival (PFS). The caption and median PFS values were correct.

Abbreviations

AEs:

Adverse events

CNI:

Tumor cell-free DNA copy number instability

CI:

Confidence interval

DC:

Disease control

DLT:

Dose-limiting toxicity

irAEs:

Immune-related adverse events

irRECIST:

Immune-related response criteria

GNP:

Gemcitabine and nab-paclitaxel

MTD:

Maximum tolerated dose

NSCLC:

Non-small cell lung cancer

OS:

Overall survival

PD:

Disease progression

PDAC:

Pancreatic adenocarcinoma

PD-1:

Programmed cell death protein 1

PD-L1:

PD-1 ligand

PFS:

Progression-free survival

RP2D:

Recommended phase 2 dose

SD:

Stable disease

TEAE:

Treatment-emergent AE

WIRB:

Western Institutional Review Board

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Acknowledgements

The authors express their gratitude and appreciation to all those that participated.

Funding

This study was funded by Western Regional Medical Center, Inc.

Author information

Authors and Affiliations

Authors

Contributions

Conception and design: G. Weiss, V. Khemka

Acquisition of data: All authors

Analysis and interpretation of data: All authors

Writing, review, and/or revision of the manuscript: All authors

Administrative, technical, or material support (eg, reporting or organizing data, constructing databases): All authors

Study supervision: G. Weiss, V. Khemka

Corresponding author

Correspondence to Glen J. Weiss.

Ethics declarations

Conflict of interest

G. Weiss has been a paid consultant for Blend Therapeutics, Pharmatech, IDEA Pharma, AZ Medical Board, GLG Council, Ignyta, Circulogene Theranostics, Viomics, and Paradigm, has received speaker honorarium from Medscape, Merck, Novartis, and Pfizer; holds ownership interest in Circulogene Theranostics, and travel/accommodations from NantWorks, Cambridge Healthtech Institute, and Tesaro. J. Beck, K. Bornemann-Kolatzki, H. Urnovitz, and E. Schütz are employees of and hold ownership interest in Chronix Biomedical. V. Khemka has been a paid consultant for Axcess Oncology. No potential conflicts of interest were disclosed by the other authors.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Weiss, G.J., Blaydorn, L., Beck, J. et al. Phase Ib/II study of gemcitabine, nab-paclitaxel, and pembrolizumab in metastatic pancreatic adenocarcinoma. Invest New Drugs 36, 96–102 (2018). https://doi.org/10.1007/s10637-017-0525-1

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  • DOI: https://doi.org/10.1007/s10637-017-0525-1

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