Abstract
Background: ML18147 evaluated continued bevacizumab with second-line chemotherapy for patients with metastatic colorectal cancer (mCRC) progressing after the standard first-line bevacizumab-containing therapy. Patients and methods: Evaluating outcomes according to tumor Kirsten rat sarcoma virus oncogene (KRAS) status was an exploratory analysis. KRAS data were collected from local laboratories (using their established methods) and/or from a central laboratory (mutation-specific Scorpion amplification-refractory mutation system). No adjustment was made for multiplicity; analyses were not powered to detect statistically significant differences. Results: Of 820 patients, 616 (75%) had unambiguous KRAS data; 316 (51%) had KRAS wild-type tumors and 300 (49%) had mutant KRAS tumors. The median progression-free survival (PFS) was 6.4 months for bevacizumab plus chemotherapy and 4.5 months for chemotherapy [P < 0.0001; HR = 0.61; 95% confidence interval (CI): 0.49-0.77] for wild-type KRAS and 5.5 and 4.1 months, respectively (P = 0.0027; HR = 0.70; 95% CI: 0.56-0.89) for mutant KRAS. The median overall survival (OS) was 15.4 and 11.1 months, respectively (P = 0.0052; HR = 0.69; 95% CI: 0.53-0.90) for wild-type KRAS and 10.4 versus 10.0 months, respectively (P = 0.4969; HR = 0.92; 95% CI: 0.71-1.18) for mutant KRAS. In both analyses, no treatment interaction by KRAS status was observed (PFS, P = 0.4436; OS, P = 0.1266). Conclusions: Bevacizumab beyond first progression represents an option for patients with mCRC treated with bevacizumab plus standard first-line chemotherapy, independent of KRAS status.
| Original language | English |
|---|---|
| Journal | Annals of Oncology |
| Volume | 24 |
| Issue number | 9 |
| Pages (from-to) | 2342-2349 |
| Number of pages | 8 |
| ISSN | 0923-7534 |
| DOIs | |
| Publication status | Published - 09.2013 |
Funding
DA has received consulting fees or honoraria from Roche, Merck, and Amgen and research funding from Roche. TA is a consultant for Roche and Amgen and has received honoraria from Roche, Amgen, and Merck Serono. JB is an advisory board member for and has received honoraria from Roche. SK has received consulting fees/honoraria, travel grants, and payment for lectures including service on speakers bureaus from Roche. MM is an employee of Roche. TM is an employee of Roche Genentech. PÖ has received consulting fees, honoraria, travel grants, or lecturing fees from Roche, Amgen, and Merck, research funding from Roche, and is an advisory board member for Roche, Amgen, Bayer, Sanofi Oncology, and Merck. IR-R is an employee of Roche. JS has received honoraria for consultant or advisory activity from Sanofi-Aventis and Roche. EVC has received research funding from Roche, paid to his institution. RvM is an advisory board member for Roche, Novartis, Merck, Amgen, and Bristol-Myers Squibb and has received an unrestricted research grant from Roche, Amgen, and Merck. RG has no conflict to declare. This study was sponsored by F. Hoffmann-La Roche. Support for third-party writing assistance for this manuscript was provided by F. Hoffmann-La Roche.
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
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