Abstract
Purpose
Trifluridine/tipiracil (FTD/TPI) improves the overall survival (OS) of metastatic colorectal cancer (mCRC) patients. Additionally, FTD/TPI plus bevacizumab (BEV) has demonstrated promising efficacy for mCRC patients who are refractory to standard chemotherapy. Chemotherapy-induced neutropenia (CIN) has been reported to be an indicator of efficacy for FTD/TPI. This study investigated whether CIN was an indicator of efficacy for FTD/TPI plus BEV.
Methods
We reviewed chemo-refractory mCRC patients who were treated with FTD/TPI alone (monotherapy) or FTD/TPI plus BEV (combination) at our institution and compared the safety and efficacy of the two. Progression-free survival (PFS) and OS were analyzed using Kaplan–Meier curves. We also investigated correlations between CIN and outcomes.
Results
In total, 56 patients received FTD/TPI, among whom 24 and 32 were treated with monotherapy and combination therapy, respectively. The median PFS was 1.8 and 4.7 months for the monotherapy and combination arms, respectively (hazard ratio [HR]: 0.28; 95% confidence interval [CI]: 0.15–0.51; P < 0.001). The median OS was 6.3 and 11.7 months for the monotherapy and combination arms, respectively (HR 0.25; 95% CI 0.13–0.48; P < 0.001). CIN (Grade 3 or worse) developed in five (20.8%) and 17 (53.1%) patients from the monotherapy and combination arms, respectively (P = 0.030). Patients with CIN in the combination arm had improved PFS and OS compared with non-CIN patients (P = 0.033 and P = 0.045, respectively).
Conclusions
FTD/TPI plus BEV prolonged PFS and OS and had tolerable toxicity compared with FTD/TPI alone. CIN is an indicator of patients who will benefit from FTD/TPI plus BEV.
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Abbreviations
- FTD/TPI:
-
Trifluridine/tipiracil
- BEV:
-
Bevacizumab
- mCRC:
-
Metastatic colorectal cancer
- CIN:
-
Chemotherapy-induced neutropenia
- Monotherapy:
-
FTD/TPI alone
- Combination:
-
FTD/TPI plus BEV
- CI:
-
Confidence interval
- OS:
-
Overall survival
- PFS:
-
Progression-free survival
- CTCAE:
-
Common Terminology Criteria for Adverse Events
- ECOG:
-
Eastern Cooperative Oncology Group
- PS:
-
Performance status
- G-CSF:
-
Granulocyte colony-stimulating factor
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Acknowledgements
We thank James P. Mahaffey, PhD, from Edanz Group (https://en-author-services.edanzgroup.com/) for editing a draft of this manuscript.
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Yoshinori Kagawa received reports lecture fee from Chugai Pharmaceutical Co., Ltd., Taiho Pharmaceutical Co., Ltd., Bayer Yakuhin Japan, Eli Lilly, Yakult Honsha Co., Ltd., Takeda Pharmaceutical Co., Ltd., Ono Pharmaceutical Co., Ltd. and Merck Biopharma Co., Ltd. Takeshi Kato reports receiving honoraria from ONO Pharmaceutical Co., Chugai Pharmaceutical Co., Takeda Pharmaceutical Co., Ltd., Taiho Pharmaceutical Co., Ltd, Bayer Yakuhin Japan and Boehringer-Ingelheim, receiving research funding from Chugai Pharmaceutical Co, and Takeda Pharmaceutical Co. outside the submitted work. The other authors declare that they have no conflict of interest.
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The study data and informed consent were obtained from all individual participants included in the study in accordance with the Declaration of Helsinki and were approved by the Ethics Review Board of our institution (registration number: 1901020).
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Nose, Y., Kagawa, Y., Hata, T. et al. Neutropenia is an indicator of outcomes in metastatic colorectal cancer patients treated with FTD/TPI plus bevacizumab: a retrospective study. Cancer Chemother Pharmacol 86, 427–433 (2020). https://doi.org/10.1007/s00280-020-04129-6
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DOI: https://doi.org/10.1007/s00280-020-04129-6