New mechanism of pancreatic cancer discovered

A new study from Karolinska Institutet shows how two types of cell change interact in the development of cancer. The results can improve the chances of early discovery of cancer - including pancreatic cancer, one of the deadliest forms of the disease. Cancer of the pancreas is a form of cancer that has few treatment options and a poor prognosis. It is linked to two particularly common cellular changes: mutations in a family of cancer genes called RAS and increased activity in the 'Hedgehog' signalling pathway, a molecular signal transmission mechanism that is normally only activated during embryonic growth. The new study, which is published Structural & Molecular Biology, shows how RAS and the Hedgehog pathway interact in the development of pancreatic cancer in mice. Activation of cancer genes in the RAS family causes the tumour cells to secrete the factor (SHH) that activates Hedgehog signalling, and shuts off the tumour cell's own ability to respond to this type of stimulation. The blocking of the Hedgehog response helps, in this phase, to secure the survival of the tumour cells while the surrounding cells are stimulated to grow.