Published in:
01-01-2012 | 2011 SSAT Plenary Presentation
RAGE Gene Deletion Inhibits the Development and Progression of Ductal Neoplasia and Prolongs Survival in a Murine Model of Pancreatic Cancer
Authors:
Joseph DiNorcia, Minna K. Lee, Dorota N. Moroziewicz, Megan Winner, Paritosh Suman, Fei Bao, Helen E. Remotti, Yu Shan Zou, Shi Fang Yan, Wanglong Qiu, Gloria H. Su, Ann Marie Schmidt, John D. Allendorf
Published in:
Journal of Gastrointestinal Surgery
|
Issue 1/2012
Login to get access
Abstract
Background
The receptor for advanced glycation end-products (RAGE) is implicated in pancreatic tumorigenesis. Activating Kras mutations and p16 inactivation are genetic abnormalities most commonly detected as pancreatic ductal epithelium progresses from intraepithelial neoplasia (PanIN) to adenocarcinoma (PDAC).
Objective
The aim of this study was to evaluate the effect of RAGE (or AGER) deletion on the development of PanIN and PDAC in conditional Kras
G12D
mice.
Materials and Methods
Pdx1-Cre; LSL-Kras
G12D/+ mice were crossed with RAGE
−/− mice to generate Pdx1-Cre; LSL-Kras
G12D/+
; RAGE
−/− mice. Pdx1-Cre; LSL-Kras
G12D/+; p16
Ink4a−/− mice were crossed with RAGE
−/− mice to generate Pdx1-Cre; LSL-Kras
G12D/+; p16
Ink4a−/−; RAGE
−/− mice. Pancreatic ducts were scored and compared to the relevant RAGE
+/+ controls.
Results
At 16 weeks of age, Pdx1-Cre; LSL-Kras
G12D/+; RAGE
−/− mice had significantly fewer high-grade PanIN lesions than Pdx1-Cre; LSL-Kras
G12D/+; RAGE
+/+ controls. At 12 weeks of age, none of the Pdx1-Cre; LSL-Kras
G12D/+; p16
Ink4a−/−; RAGE
−/− mice had PDAC compared to a 45.5% incidence of PDAC in Pdx1-Cre; LSL-Kras
G12D/+; p16
Ink4a−/−; RAGE
+/+ controls. Finally, Pdx1-Cre; LSL-Kras
G12D/+; p16
Ink4a−/−; RAGE
−/− mice also displayed markedly longer median survival.
Conclusion
Loss of RAGE function inhibited the development of PanIN and progression to PDAC and significantly prolonged survival in these mouse models. Further work is needed to target the ligand–RAGE axis for possible early intervention and prophylaxis in patients at risk for developing pancreatic cancer.