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Evaluation of FOLFOX or CAPOX reintroduction with or without bevacizumab in relapsed colorectal cancer patients treated with oxaliplatin as adjuvant chemotherapy (REACT study)

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Abstract

Background

Chemotherapy in relapsed colorectal cancer patients treated with oxaliplatin as adjuvant chemotherapy is under debate. REACT study aimed to investigate the efficacy of reintroducing modified FOLFOX6 (mFOLFOX6) or CAPOX with or without bevacizumab in recurrent colorectal cancer patients after oxaliplatin adjuvant chemotherapy.

Methods

Patients that participated in this trial had a medical history of adjuvant chemotherapy, including oxaliplatin with a cumulative dose greater than 400 mg/m2, and recurrence that was diagnosed more six months post adjuvant chemotherapy. Primary endpoints were response rate (RR) and disease control rate (DCR), while key secondary endpoints were time to treatment failure (TTF), progression-free survival (PFS), overall survival (OS), and safety.

Results

A total of 31 patients were enrolled between October 2012 and October 2016. Of the 29 eligible patients, 7 received mFOLFOX6 and 22 received CAPOX. The RR was 62.1% (95% confidence interval 42.3–79.3) and the DCR was 82.8% (95% confidence interval 64.2–94.2). The RR for oxaliplatin-free interval was 100.0% in months 6–12 and 56.0% after 12 months. Median TTF, PFS, and OS were 6.3, 10.8, and 28.7 months, respectively. Grade 3 or worse peripheral sensory neuropathy developed in 6.5%. Allergic reactions occurred in 12.9% of the patients, with one (3.2%) grade 3 episode. There were no other severe treatment-related adverse events.

Conclusion

Reintroduction of oxaliplatin was feasible and achieved high RR or DCR in patients after more than 6 months post oxaliplatin adjuvant chemotherapy.

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Abbreviations

FOLFOX:

Levoleucovorin, 5-fluorouracil, and oxaliplatin

CAPOX:

Capecitabine and oxaliplatin

l-LV:

Levoleucovorin

5-FU:

5-Fluorouracil

mFOLFOX6:

Modified FOLFOX6

RR:

Response rate

DCR:

Disease control rate

TTF:

Time to treatment failure

PFS:

Progression-free survival

OS:

Overall survival

PSN:

Peripheral sensory neuropathy

mCRC:

Metastatic colorectal cancer

RDI:

Relative dose intensity

CR:

Complete response

PR:

Partial response

SD:

Stable disease

PD:

Progressive disease

NE:

Not evaluable

RDI:

Relative dose intensity

FAS:

Full analysis set

CTCAE:

The Common Terminology Criteria for Adverse Events

UMIN:

University Hospital Medical Information Network

IDEA:

The International Duration Evaluation of Adjuvant Therapy

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Acknowledgements

We thank the patients, their families, and the investigators who participated in the REACT study.

Funding

This study was supported by Surgeons and Oncologists study group for developing New Strategy in Cancer Treatment (SONIC).

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Correspondence to Masahito Kotaka.

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Conflict of interest

M. Kotaka has received honoraria from Chugai Pharma and Yakult Honsha. S. Iwamoto and H. Satake have received honoraria from Chugai Pharma. D. Sakai has received honoraria and research funding from Chugai Pharma; research funding from Yakult Honsha. T. Kudo belong to a donated fund laboratory from Yakult Honsha, Chugai Pharma, and Ono Pharma. A. Tsuji has received honoraria from Chugai Pharma; research funding from Kyowa Kirin. N. Sugimoto has received research funding from Chugai Pharma. T. Satoh has received honoraria from Yakult Honsha; belonging to a donated fund laboratory from Yakult Honsha and Chugai Pharma. T. Yamanaka has received honoraria and research funding from Takeda Pharma, Chugai Pharma, Boehringer Ingelheim, Taiho pharma, Daiichi-Sankyo, and Ono Pharma; research funding from Merck Biopharma, Astellas Pharma, and Bayer. N. Tomita has received research funding from Chugai Pharma, Eli Lilly Japan, Taiho pharma, Beyer. and Sysmex. All remaining authors indicated no potential conflict of interest.

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Kotaka, M., Iwamoto, S., Satake, H. et al. Evaluation of FOLFOX or CAPOX reintroduction with or without bevacizumab in relapsed colorectal cancer patients treated with oxaliplatin as adjuvant chemotherapy (REACT study). Int J Clin Oncol 25, 1515–1522 (2020). https://doi.org/10.1007/s10147-020-01701-1

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