Abstract
Introduction
A combined therapy MEK inhibitor, Cobimetinib (CB) and BRAF inhibitor, Vemurafenib (VMF), results in an improvement in progression-free survival among patients with BRAF V600-mutated metastatic melanoma. VMF skin adverse effects attributed to ERK paradoxical activation are decreased by the adjunction of CB. The aim of this study was to determine if this combination also improved the renal side effects of VMF.
Patients and methods
To investigate the incidence of acute kidney injury (AKI), we conducted a retrospective observational monocentric study in Lyon Sud University Hospital in France. We included 38 patients with metastatic BRAF-mutated melanomas treated by VMF and CB between March 2015 and June 2016. According to the NCI-CTCAE classification, AKI was defined as an increase in serum creatinine exceeding the baseline concentration by 1.5-fold. Serum creatinine was measured before treatment, then on a monthly basis during treatment, and 1 month after treatment discontinuation. Patients were divided into two main groups: AKI-positive (AKI+) and AKI-negative (AKI−), and further subdivided into three groups according to AKI severity (stage 1–5).
Results
Of 38 patients, 29 (76%) were AKI−, and all 9 AKI+ patients (24%) were diagnosed within the first trimester of treatment. Three-quarters of AKI (n = 7, 77%) had stage 1 AKI and the remaining 23% stage 2 AKI. Pre-treatment renal function was significantly better in AKI+ group: 105 vs. 80 ml/min/1.73m² AKI−, p = 0.009. Compared to previous results, the AKI incidence under the combined VMF–CB vs. VMF monotherapy was reduced by 60%.
Conclusion
We reported a reduced incidence and severity of nephrotoxicity of the association inhibitors of BRAF and MEK compared to a BRAF inhibitor monotherapy.
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Acknowledgements
The authors would like to thank the members of Dermatology Department of the CHU Lyon Sud, Mathilde Nouvier MD, Pierre Trolliet and Louis De Laforcade MD from the Nephrology Department of CHU Lyon Sud, Lyon, France for the help with patient recruitment.
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All procedures in our study involving human participants were in accordance with the ethical standards with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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This article does not contain any studies with animals performed by any of the authors.
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Teuma, C., Pelletier, S., Amini-Adl, M. et al. Adjunction of a MEK inhibitor to Vemurafenib in the treatment of metastatic melanoma results in a 60% reduction of acute kidney injury. Cancer Chemother Pharmacol 79, 1043–1049 (2017). https://doi.org/10.1007/s00280-017-3300-2
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DOI: https://doi.org/10.1007/s00280-017-3300-2