29 December 2018 : Laboratory Research
Distinct Diagnostic and Prognostic Values of Kinesin Family Member Genes Expression in Patients with Breast CancerXiaowei Song1ACE, Tengfang Zhang2CDE, Xiangkun Wang3ACD, Xiwen Liao3ABC, Chuangye Han3DF, Chengkun Yang3DE, Ka Su1EF, Wenlong Cao1F, Yizhen Gong4C, Zhu Chen1F, Quanfa Han3E, Jiehua Li1AEG*
Med Sci Monit 2018; 24: MOL9442-9464
BACKGROUND: This study investigated the diagnostic and prognostic values of kinesin superfamily proteins (KIFs) in breast cancer (BC) patients.
MATERIAL AND METHODS: All data were obtained from the Cancer Genome Atlas. DESeq was run to test for differentially expressed KIF genes. Patients were divided into high- and low-expression groups according to the median expression values of each KIF genes. Survival data were calculated using the Cox proportional hazard model. Comprehensive survival analysis was performed to evaluate the prognostic value of the prognostic signature. Gene set enrichment analysis (GSEA) was conducted to identify associated gene ontology and KEGG pathways.
RESULTS: Bioinformatics analysis showed that all KIF genes were significantly enriched during DNA replication and the cell cycle, and co-expressed with each other. Thirteen KIF genes were differentially expressed in cancer and adjacent tissues, and high levels of KIF15, KIF20A, KIF23, KIF2C and KIF4A genes were significantly correlated with poor overall survival (OS). GSEA showed that BC patients with high expression of KIF15, KIF20A, KIF23, KIF2C and KIF4A were enriched in the cell cycle process, P53 regulation pathway and mismatch repair. Combinations of low expression of KIF15, KIF20A, KIF23, KIF2C and KIF4A were more highly correlated with favorable OS. Nomograms showed that the KIF4A risk score provided the maximum number of risk points (range 0–100), whereas other genes made a lower contribution.
CONCLUSIONS: We conclude that 13 KIF genes are differentially expressed in BC tumor tissues, and KIF15, KIF20A, KIF23, KIF2C and KIF4A are associated with prognostic factors in BC.
Keywords: Diagnosis, Kinesin, Prognosis, RNA
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