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Unmasking the deadly secrets of pancreatic cancer
Date:10/25/2012

A large-scale study that defines the complexity of underlying mutations responsible for pancreatic cancers in more than 100 patients was published in Nature today.

The analysis represents the first report from Australia's contribution to the International Cancer Genome Consortium (ICGC), which brings together the world's leading scientists to identify the genetic drivers behind 50 different cancer types.

Pancreatic cancer has the highest mortality rate of all the major cancers and is one of the few for which survival has not improved substantially over the past 40 years. It is the fourth-leading cause of cancer death.

Professor Sean Grimmond, from the Institute for Molecular Bioscience (IMB) at The University of Queensland, and Professor Andrew Biankin, from The Kinghorn Cancer Centre at Sydney's Garvan Institute of Medical Research/ St. Vincent's Hospital led an international team of more than 100 researchers that sequenced the genomes of 100 pancreatic tumours and compared them to normal tissue to determine the genetic changes that lead to this cancer.

"We found over 2,000 mutated genes in total, ranging from the KRAS gene, which was mutated in about 90 per cent of samples, to hundreds of gene mutations that were only present in 1 or 2 per cent of tumours," Professor Grimmond said.

"So while tumours may look very similar under the microscope, genetic analysis reveals as many variations in each tumour as there are patients.

"This demonstrates that so-called 'pancreatic cancer' is not one disease, but many, and suggests that people who seemingly have the same cancer might need to be treated quite differently."

Professor Biankin said such individual genetic diagnoses and treatments represent the future of healthcare.

"In this study, we found a set of genes, the axon guidance pathway, that is frequently damaged in pancreatic cancer patients and is associated with a potentially poor
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Contact: Iris Hui
iris.hui@researchaustralia.org
61-292-958-545
Research Australia
Source:Eurekalert

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