A locus on chromosome 9p21 which encodes three cell cycle inhibitors is frequently deleted in human cancer. Two of these, p16INKa and p14ARF, function as tumour suppressors. A new mouse model now shows that a third, p15INK4b, also contributes to the tumour suppressor function of this locus. Mice lacking all three show enhanced tumourigenesis and a broader tumour spectrum.
- Paul Krimpenfort
- Annemieke IJpenberg
- Anton Berns