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* IN BRIEF * 08 May 2019 By * Sarah Crunkhorn * Sarah Crunkhorn Immune checkpoint inhibitors (CPIs) and interleukin-2 (IL-2) have demonstrated clinical efficacy in cancer, but can cause
severe off-target adverse events. Ishihara et al. exploit the leakiness of the tumour vasculature and the high presence of collagen in the tumour stroma to target CPI and IL-2 directly to
the tumour, through the respective conjugation or fusion to the collagen binding domain (CBD) of the blood protein von Willebrand factor. In mouse models, the CBD-modified agents accumulated
in the tumour, increased tumour-infiltrating CD8+ T cells and exerted greater suppression of tumour growth compared with their unmodified forms, without toxicity. ACCESS OPTIONS Access
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checkout ADDITIONAL ACCESS OPTIONS: _Nature Reviews Drug Discovery_ 18, 420 (2019) _doi: https://doi.org/10.1038/d41573-019-00081-0_ REFERENCES