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Nature Research, Nature, 7424(491), p. 399-405, 2012

DOI: 10.1038/nature11547

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Pancreatic cancer genomes reveal aberrations in axon guidance pathway genes

Journal article published in 2012 by Andrew V. Biankin, Christina Xu, Qinying Xu, Shinn Yeung, Q. Xu, Nikolajs Zeps, Fengmei Zhao, Yuan Qing Wu, Christina K. Yung, Karin S. Kassahn, Marie-Claude Gingras, Lakshmi B. Muthuswamy, Amber L. Johns, David K. Miller, Peter J. Wilson and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Pancreatic cancer is a highly lethal malignancy with few effective therapies. We performed exome sequencing and copy number analysis to define genomic aberrations in a prospectively accrued clinical cohort (n = 142) of early (stage I and II) sporadic pancreatic ductal adenocarcinoma. Detailed analysis of 99 informative tumours identified substantial heterogeneity with 2,016 non-silent mutations and 1,628 copy-number variations. We define 16 significantly mutated genes, reaffirming known mutations (KRAS, TP53, CDKN2A, SMAD4, MLL3, TGFBR2, ARID1A and SF3B1), and uncover novel mutated genes including additional genes involved in chromatin modification (EPC1 and ARID2), DNA damage repair (ATM) and other mechanisms (ZIM2, MAP2K4, NALCN, SLC16A4 and MAGEA6). Integrative analysis with in vitro functional data and animal models provided supportive evidence for potential roles for these genetic aberrations in carcinogenesis. Pathway-based analysis of recurrently mutated genes recapitulated clustering in core signalling pathways in pancreatic ductal adenocarcinoma, and identified new mutated genes in each pathway. We also identified frequent and diverse somatic aberrations in genes described traditionally as embryonic regulators of axon guidance, particularly SLIT/ROBO signalling, which was also evident in murine Sleeping Beauty transposon-mediated somatic mutagenesis models of pancreatic cancer, providing further supportive evidence for the potential involvement of axon guidance genes in pancreatic carcinogenesis.