[thedoc]

This week Kat Arney joins us live from the National Cancer Research  Institute's conference in  Liverpool. We find out how mistakes in cell signalling can  cause cancers and why DNA repair pathways offer targets to treat  tumours.  Also, we explore the latest developments in cancer imaging,  including new techniques that allow us to track chemical reactions  happening inside the body.  In the news, why you need to remove genes to  repair nerves, and how clearing out old cells can prevent diseases of  old age!
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