A phase II trial has demonstrated that insulin-like growth factor 1 receptor (IGF-1R) blockade in advanced neuroendocrine tumours has no efficacy, despite promising preclinical and phase I clinical trial evidence. These results highlight the challenge of interpreting response results from early phase I safety studies.
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The author would like to thank A. Spiegel (Albert Einstein College of Medicine) for his review of the manuscript and his helpful suggestions.
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Libutti, S. Blockade of IGF-1R—not effective in neuroendocrine tumours. Nat Rev Endocrinol 9, 389–390 (2013). https://doi.org/10.1038/nrendo.2013.109
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DOI: https://doi.org/10.1038/nrendo.2013.109
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