The role of quantitative NPTX2 hypermethylation as a novel serum diagnostic marker in pancreatic cancer

Joo Kyung Park, Ji Kon Ryu, Won Jae Yoon, Sang Hyub Lee, Gyung Yub Lee, Kyoung Sin Jeong, Yong Tae Kim, Yong Bum Yoon

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


Objectives: The majority of pancreatic cancers are found to be unresectable, and the only chance for cure lies on early detection and complete resection. Several genes have been discovered to be aberrantly methylated in primary pancreatic cancer tissue, and this cancer DNA can be detected in the plasma. The aims of this study were to develop a novel diagnostic marker based on epigenetic characteristics of pancreatic cancer. Methods: We enrolled 104 patients with pancreatic cancer, 60 with chronic pancreatitis, and 5 with benign biliary stone diseases. The blood samples were collected before surgery or any kinds of treatment modalities. DNA was extracted from the plasma of each patient, and NPTX2 (neuronal pentraxin II) CpG island hypermethylation was examined quantitatively by real-time polymerase chain reaction. Results: NPTX2 hypermethylation levels were significantly higher compared with chronic pancreatitis (P = 0.016). The sensitivity and specificity were 80% and 76%, respectively (cutoff = 0.015). NPTX2 gene hypermethylation level was significantly elevated in correlation with higher American Joint Committee on Cancer stages. Conclusions: The aberrantly methylated NPTX2 gene may help to distinguish between chronic pancreatitis and pancreatic cancer with conventional diagnostic tools and could become a valuable diagnostic marker.

Original languageEnglish
Pages (from-to)95-101
Number of pages7
Issue number1
StatePublished - Jan 2012


  • hypermethylation
  • NPTX2
  • pancreatic cancer
  • quantitative real-time PCR


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