Justin Pritchard retweetledi

This is an interesting idea: turning a cancer's drug resistance against it
These are growth curves of tumours in mice, treated with a drug (a tyrosine kinase inhibitor). The tumours initially shrink but they all - slowly but surely - become resistant:
This study aimed to convert this resistance into vulnerability, by supplying tumours with a plasmid that deliberately provides resistance to the drug - but also encodes a suicide gene
What this means is that tumours shrink initially as they're treated with the tyrosine kinase inhibitor, but then grow back - fast - as they start to express the resistance gene
This expands the pool of resistant cells, but also the pool of cells with the suicide gene - so when the suicide gene is switched on (purple arrow), the tumours regress:
Leighow et al: nature.com/articles/s4158…


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