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High-Throughput Mutation Profiling in Intraductal Papillary Mucinous Neoplasm (IPMN).
MedLine Citation:
PMID:  21225475     Owner:  NLM     Status:  Publisher    
BACKGROUND: Specific mutations leading to the development of various histological grades of intraductal papillary mucinous neoplasm (IPMN) have been partially characterized. METHODS: Analysis of 323 oncogenic mutations in 22 tumor-related genes was conducted, using a chip-based matrix-assisted laser desorption time-of-flight mass spectrometer of DNA extracted from microdissected cells of low-grade (n = 14), borderline (n = 6), and invasive IPMN (n = 7). Additional assays were performed on the DNA extracted from dyplastic cells found in the background of the adenocarcinoma. RESULTS: We identified 9 K-ras mutations (low grade, 2/14; borderline, 1/6; invasive, 6/7), 3 p53 mutations (low grade, 1/14; invasive 2/7), and 2 PIK3CA mutations (low grade, 1/14; invasive, 1/7). K-ras, p53, and PIK3CA mutations present in the invasive cancer were absent in the adjacent precursor cells in 50% of the cases. In one patient, K-ras mutation was present in the precursor lesion and absent in the adjacent invasive lesion. CONCLUSIONS: Of the 22 screened tumor-related genes, only K-ras, p53, and PIK3CA mutations were found in IPMN. K-ras mutations are more prevalent in invasive than premalignant IPMN. The variable coexistence of mutations in the invasive cancer and in the adjacent precursor cells may point to the heterogeneous nature of this tumor.
Nir Lubezky; Menahem Ben-Haim; Sylvia Marmor; Eli Brazowsky; Gideon Rechavi; Joseph M Klausner; Yoram Cohen
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-1-12
Journal Detail:
Title:  Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract     Volume:  -     ISSN:  1873-4626     ISO Abbreviation:  -     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-1-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9706084     Medline TA:  J Gastrointest Surg     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Surgery B, Tel-Aviv Sourasky Medical Center, Sackler School of Medicine, Tel-Aviv University, 6 Weitzman St., Tel Aviv, 64239, Israel,
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