NDLI: Clinical and prognostic value of MET gene copy number gain and chromosome 7 polysomy in primary colorectal cancer patients

Content Provider	Springer Nature Link
Author	Seo, An Na Park, Kyoung Un Choe, Gheeyoung Kim, Woo Ho Kim, Duck Woo Kang, Sung Bum Lee, Hye Seung
Copyright Year	2015
Abstract	We aimed to explore the clinical and prognostic influence of numeric alterations of MET gene copy number (GCN) and chromosome 7 (CEP7) CN in colorectal cancer (CRC) patients. MET GCN and CEP7 CN were investigated in tissue arrayed tumors from 170 CRC patients using silver in situ hybridization (SISH). MET GCN gain was defined as ≥4 copies of MET, and CEP7 polysomy was prespecified as ≥3 copies of CEP7. Additionally, MET messenger RNA (mRNA) transcription was evaluated using mRNA ISH and compared with MET GCN. MET GCN gain was observed in 14.7 % (25/170), which correlated with advanced stage (P = 0.037), presence of distant metastasis (P = 0.006), and short overall survival (OS) (P = 0.009). In contrast, CEP7 polysomy was found in 6.5 % (11/170), which was related to tumor location in the left colon (P = 0.027) and poor OS (P = 0.029). MET GCN positively correlated with CEP7 CN (R = 0.659, P < 0.001) and mRNA transcription (R = 0.239, P = 0.002). Of note, MET GCN gain and CEP7 polysomy were also associated with poor OS (P = 0.016 and P < 0.001, respectively) in stage II/III CRC patients (n = 123). In multivariate analysis, CEP7 polysomy was an independent prognostic factor for poor OS in all patients (P = 0.009; hazard ratio [HR], 2.220; 95 % confidence interval [CI], 1.233–3.997) and in stage II/III CRC patients (P < 0.001; HR, 20.781; 95 % CI, 4.600–93.882). MET GCN gain and CEP7 polysomy could predict a poor outcome in CRC patients, especially CEP7 polysomy has the most powerful prognostic impact in stage II/III CRC patients.
Starting Page	9813
Ending Page	9821
Page Count	9
File Format	PDF
ISSN	10104283
Journal	Tumor Biology
Volume Number	36
Issue Number	12
e-ISSN	14230380
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-07-10
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Colorectal cancer MET Chromosome 7 Silver in situ hybridization Copy number gain Cancer Research
Content Type	Text
Resource Type	Article
Subject	Medicine Cancer Research

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