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Impact of the tumor microenvironment in predicting postoperative hepatic recurrence of pancreatic neuroendocrine tumors

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Title: Impact of the tumor microenvironment in predicting postoperative hepatic recurrence of pancreatic neuroendocrine tumors
Authors: Sato, Shoki Browse this author
Tsuchikawa, Takahiro Browse this author
Nakamura, Toru Browse this author
Sato, Nagato Browse this author
Tamoto, Eiji Browse this author
Okamura, Keisuke Browse this author
Shichinohe, Toshiaki Browse this author →KAKEN DB
Hirano, Satoshi Browse this author →KAKEN DB
Keywords: pancreatic neuroendocrine tumor
postoperative hepatic recurrence
tumor-infiltrating lymphocytes
Issue Date: Dec-2014
Publisher: Spandidos Publications
Journal Title: Oncology reports
Volume: 32
Issue: 6
Start Page: 2753
End Page: 2759
Publisher DOI: 10.3892/or.2014.3530
PMID: 25310565
Abstract: The disease frequency of pancreatic neuroendocrine tumors (PNETs) has been growing, and postoperative hepatic recurrence (PHR) is one of the factors affecting patient prognosis. The present study aimed to investigate biomarkers of PNETs in the primary disease site to predict PHR using immunohistochemical analysis for tumor-infiltrating lymphocytes (TILs: CD3, CD8 and CD45RO), human leukocyte antigen (HLA) class I, alpha-thalassemia/mental retardation X-linked (ATRX), death domain-associated protein (DAXX), mammalian target of rapamycin (mTOR) and phospho-mTOR (p-mTOR). Correlations were analyzed between TILs and the biomarkers, clinicopathological features and prognosis. Sixteen patients with PNETs who underwent radical surgery at our hospital were reviewed. We analyzed the correlation between PHR and immunohistochemical characteristics, and also between disease-free survival (DFS) or overall survival (OS) and the immunohistochemical characteristics. We found that PHR was associated with the expression patterns of DAXX and p-mTOR. No association was found between PHR and patient background, TILs or other biomarkers. DFS was found to be associated with ATRX, DAXX and p-mTOR. OS was associated only with p-mTOR. In conclusion, ATRX, DAXX and p-mTOR are useful molecular biomarkers for predicting PHR in patients who undergo radical surgery for PNETs. Use of these biomarkers will enable earlier decisions on which patients may benefit from adjuvant therapy.
Type: article
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐藤 彰記

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