Genome-wide screen identifies a novel prognostic signature for breast cancer survival

Mao, Xuan Y.; Lee, Matthew J.; Zhu, Jeffrey; Zhu, Carissa; Law, Sindy M.; Snijders, Antoine M.

doi:10.18632/oncotarget.14776

Title: Genome-wide screen identifies a novel prognostic signature for breast cancer survival

Journal Article · Sat Jan 21 00:00:00 EST 2017 · Oncotarget

DOI:https://doi.org/10.18632/oncotarget.14776· OSTI ID:1409428

Mao, Xuan Y. ^[1]; Lee, Matthew J. ^[1]; Zhu, Jeffrey ^[1]; Zhu, Carissa ^[1]; Law, Sindy M. ^[2]; Snijders, Antoine M. ^[1]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of California, San Francisco, CA (United States)

Large genomic datasets in combination with clinical data can be used as an unbiased tool to identify genes important in patient survival and discover potential therapeutic targets. We used a genome-wide screen to identify 587 genes significantly and robustly deregulated across four independent breast cancer (BC) datasets compared to normal breast tissue. Gene expression of 381 genes was significantly associated with relapse-free survival (RFS) in BC patients. We used a gene co-expression network approach to visualize the genetic architecture in normal breast and BCs. In normal breast tissue, co-expression cliques were identified enriched for cell cycle, gene transcription, cell adhesion, cytoskeletal organization and metabolism. In contrast, in BC, only two major co-expression cliques were identified enriched for cell cycle-related processes or blood vessel development, cell adhesion and mammary gland development processes. Interestingly, gene expression levels of 7 genes were found to be negatively correlated with many cell cycle related genes, highlighting these genes as potential tumor suppressors and novel therapeutic targets. A forward-conditional Cox regression analysis was used to identify a 12-gene signature associated with RFS. A prognostic scoring system was created based on the 12-gene signature. This scoring system robustly predicted BC patient RFS in 60 sampling test sets and was further validated in TCGA and METABRIC BC data. Our integrated study identified a 12-gene prognostic signature that could guide adjuvant therapy for BC patients and includes novel potential molecular targets for therapy.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1409428

Journal Information:: Oncotarget, Vol. 8, Issue 8; ISSN 1949-2553

Publisher:: Impact JournalsCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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