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Proteomic analysis of pancreatic juice for the identification of biomarkers of pancreatic cancer

Authors
 Jeong Youp Park  ;  Sun-A Kim  ;  Joo Won Chung  ;  Seungmin Bang  ;  Seung Woo Park  ;  Young-Ki Paik  ;  Si Young Song 
Citation
 Journal of Cancer Research and Clinical Oncology, Vol.137(8) : 1229-1238, 2011 
Journal Title
 Journal of Cancer Research and Clinical Oncology 
ISSN
 0171-5216 
Issue Date
2011
Abstract
INTRODUCTION: Protein profiles of endoscopically collected pancreatic juice from normal, chronic pancreatitis patients and pancreatic cancer patients were compared to identify diagnostic biomarkers of pancreatic cancer. METHODS: Secretin was injected intravenously and pancreatic juice was collected via selective cannulation of the pancreatic duct during endoscopic retrograde cholangiopancreatography. Pancreatic juices consisting of three pooled samples for normal control, chronic pancreatitis, and pancreatic cancer patients were compared using two-dimensional gel electrophoresis, and the proteins were subsequently identified using MALDI-TOF-MS. RESULTS: Thirty-five protein spots were up-regulated twofold in pancreatic cancer compared with the levels in the normal controls, and 85 protein spots were present in pancreatic cancer samples but not in normal controls. After excluding spots that were also expressed in chronic pancreatitis, 26 protein spots that were up-regulated or only expressed in pancreatic cancer samples were identified. Among the identified proteins, we confirmed the expressions of BIG2, PRDX6, and REG1α in pancreatic cancer tissue using immunohistochemistry. ELISA showed that the serum level of REG1α was significantly higher in patients with pancreatic cancer than it was in the normal controls (P = 0.023). With the best cut-off value, the sensitivity and specificity of REG1α to differentiate normal and pancreatic cancer were 82.6 and 81.8%, compared with 69.6 and 100% for CA19-9. CONCLUSIONS: We have shown that pancreatic juice is a good source of pancreatic cancer tumor markers. Further studies are needed to determine the clinical implications of REG1α and other markers.
Full Text
http://link.springer.com/article/10.1007%2Fs00432-011-0992-2
DOI
10.1007/s00432-011-0992-2
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원) > 1. Journal Papers
Yonsei Authors
Kim, Sun A(김선아) ORCID logo https://orcid.org/0000-0002-7174-3640
Park, Seung Woo(박승우) ORCID logo https://orcid.org/0000-0001-8230-964X
Park, Jeong Youp(박정엽) ORCID logo https://orcid.org/0000-0003-0110-8606
Bang, Seungmin(방승민) ORCID logo https://orcid.org/0000-0001-5209-8351
Song, Si Young(송시영) ORCID logo https://orcid.org/0000-0002-1417-4314
Chung, Joo Won(정주원)
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URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/94721
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