Abundant copy-number loss of CYCLOPS and STOP genes in gastric adenocarcinoma
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Author(s)
Cutcutache, Ioana
Suzuki, Yuka
Lei, Zhengdeng
Deng, Niantao
Zhang, Shenli
Tan, Patrick
Wu, Alice Yingting
McPherson, John Richard
Wong, Wai Keong
Soo, Khee Chee
Date Issued
July 2015
Journal
Gastric Cancer
Publisher
Springer Japan
Citation
Cutcutache, Ioana, Alice Yingting Wu, Yuka Suzuki, John Richard McPherson, Zhengdeng Lei, Niantao Deng, Shenli Zhang, et al. “Abundant Copy-Number Loss of CYCLOPS and STOP Genes in Gastric Adenocarcinoma.” Gastric Cancer 19, no. 2 (July 24, 2015): 453–465.
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Final published version
Abstract
Background
Gastric cancer, a leading cause of cancer death worldwide, has been little studied compared with other cancers that impose similar health burdens. Our goal is to assess genomic copy-number loss and the possible functional consequences and therapeutic implications thereof across a large series of gastric adenocarcinomas.
Methods
We used high-density single-nucleotide polymorphism microarrays to determine patterns of copy-number loss and allelic imbalance in 74 gastric adenocarcinomas. We investigated whether suppressor of tumorigenesis and/or proliferation (STOP) genes are associated with genomic copy-number loss. We also analyzed the extent to which copy-number loss affects Copy-number alterations Yielding Cancer Liabilities Owing to Partial losS (CYCLOPS) genes–genes that may be attractive targets for therapeutic inhibition when partially deleted.
Results
The proportion of the genome subject to copy-number loss varies considerably from tumor to tumor, with a median of 5.5 %, and a mean of 12 % (range 0–58.5 %). On average, 91 STOP genes were subject to copy-number loss per tumor (median 35, range 0–452), and STOP genes tended to have lower copy-number compared with the rest of the genes. Furthermore, on average, 1.6 CYCLOPS genes per tumor were both subject to copy-number loss and downregulated, and 51.4 % of the tumors had at least one such gene.
Conclusions
The enrichment of STOP genes in regions of copy-number loss indicates that their deletion may contribute to gastric carcinogenesis. Furthermore, the presence of several deleted and downregulated CYCLOPS genes in some tumors suggests potential therapeutic targets in these tumors.
MIT Department
Singapore-MIT Alliance in Research and Technology (SMART)
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DOI of Published Version
https://doi.org/10.1007/s10120-015-0514-z
