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S-1 and irinotecan plus bevacizumab as second-line chemotherapy for patients with oxaliplatin-refractory metastatic colorectal cancer: a multicenter phase II study in Japan (KSCC1102)

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A Correction to this article was published on 14 November 2017

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Abstract

Background

Combination chemotherapy with S-1 and irinotecan is one of the standard treatments for metastatic colorectal cancer (mCRC) in Japan. However, there are few alternative practical second-line therapies. We conducted a phase II trial to evaluate the efficacy and safety of the combination of S-1 and irinotecan plus bevacizumab as a second-line treatment for oxaliplatin-refractory mCRC.

Methods

Patients with mCRC who were previously treated with oxaliplatin-containing regimens were enrolled. Oral S-1 at a dose of 80 mg/m2 was administered twice daily for 2 weeks, followed by a 1-week drug-free interval. Irinotecan at a dose of 150 mg/m2 and bevacizumab at a dose of 7.5 mg/kg were administered on day 1. The primary endpoint was progression-free survival (PFS).

Results

Thirty-seven patients were enrolled, and 34 and 36 patients were assessed for response and safety, respectively. The overall response rate was 20.6 % (95 % confidence interval [CI] 8.7–37.9), and the disease control rate was 76.5 % (95 % CI 58.8–89.3). The median PFS was 5.6 months (95 % CI 3.8–7.0). The median overall survival was 16.4 months (95 % CI 8.1–20.0). The most common grade 3/4 adverse events included neutropenia (25.0 %), anorexia (22.2 %), anemia (16.7 %), and fatigue/malaise (16.7 %). The most common grade 3/4 adverse event of special interest for bevacizumab was hypertension (30.6 %). One treatment-related death caused by gastrointestinal bleeding occurred.

Conclusions

The findings suggest that the combination of S-1 and irinotecan plus bevacizumab is effective and tolerable as second-line chemotherapy for patients with oxaliplatin-refractory mCRC.

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Change history

  • 14 November 2017

    In the original publication, in Abstract, the sentence that reads as, “Oral S-1 at a dose of 80 mg/m2 was…………. drug-free interval” should read as, “Oral S-1 at a dose of 40 mg/m2 was administered twice daily for 2 weeks, followed by a 1-week drug-free interval.

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Acknowledgments

We thank all the patients and families who participated in this trial, and we are indebted to the physicians and all of the clinical study teams at the participating institutions. We also thank Ms. Sanae Sakamoto for her excellent secretarial assistance at the data center of Clinical Research Support Center Kyushu.

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Correspondence to Hideo Baba.

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Conflict of interest

Y Miyamoto, H Tanioka, S Maekawa, H Kawanaka, M Kitazono, H Murakami, Y Ogata, H Saeki, M Shimokawa, S Natsugoe and Y Akagi have no conflict of interest. A Tsuji has received honoraria from Taiho Pharmaceutical. E Oki has received fees for promotional materials from Taiho Pharmaceutical, Yakult Honsha, Chugai Pharmaceutical and Merck Serono. Y Emi has received honoraria from Taiho Pharmaceutical, Chugai Pharmaceutical and Yakult Honsha. H Baba has received research funding and honoraria from Taiho Pharmaceutical, Chugai Pharmaceutical, Daiichi Sankyo. Y Maehara has received research funding and honoraria from Taiho Pharmaceutical, Chugai Pharmaceutical, Yakult Honsha and Daiichi Sankyo.

Additional information

A correction to this article is available online at https://doi.org/10.1007/s10147-017-1212-0.

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10147_2015_943_MOESM1_ESM.ppt

Supplementary Fig. 1 Kaplan–Meier survival curve for progression-free survival (A) and overall survival (B) among patients receiving prior chemotherapy with or without bevacizumab. Bmab: bevacizumab (ppt 115 kb)

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Miyamoto, Y., Tsuji, A., Tanioka, H. et al. S-1 and irinotecan plus bevacizumab as second-line chemotherapy for patients with oxaliplatin-refractory metastatic colorectal cancer: a multicenter phase II study in Japan (KSCC1102). Int J Clin Oncol 21, 705–712 (2016). https://doi.org/10.1007/s10147-015-0943-z

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