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• W2894501980 abstract "Abstract Triple‐negative breast cancer ( TNBC ), an intrinsic subtype of breast cancer, is characterized by aggressive pathology and shorter overall survival. Yet there is no effective therapy for these patients. Breast cancer stem cells ( BCSC s) in TNBC may account for treatment failure. It is urgent to identify new therapeutic targets for TNBC . tRNA‐derived small noncoding RNAs ( tDR s) represent a new class of small noncoding RNA s (snc RNA ), which have been reported in some human diseases and biological processes. However, there is no detailed information about the relationship between tDR s and BCSC s. In this study, a population of CD 44 + / CD 24 −/low cells was isolated and identified by reliable BCSC surface markers. tDR expression profiles in TNBC and non‐ TNBC CSC s were performed by RNA sequencing. A total of 1327 differentially expressed tDR s contained 18 upregulated and 54 downregulated in TNBC group. Furthermore, the selected tDR s were validated by quantitative reverse transcription‐polymerase chain reaction ( qRT ‐ PCR ). tDR ‐000620 expression level was consistently lower in TNBC cell lines CSC s (all P < 0.05) and serum samples ( t = 2.597, P = 0.013). tDR ‐000620 expression was significant association with age ( P = 0.018), node status ( P = 0.026) and local recurrence ( P = 0.019) by chi‐square test. Kaplan‐Meier method with log‐rank test for comparison of recurrence curves. The results showed that the tDR ‐000620 expression ( P = 0.002) and node status ( P = 0.001) group were statistically significant with recurrence‐free survival. Furthermore, multivariate Cox regression demonstrated that lymphatic metastasis ( HR , 3.616; 95% CI , 1.234‐10.596; P = 0.019) and low tDR ‐000620 expression ( HR , 0.265; 95% CI , 0.073‐0.959; P = 0.043) were two independent adverse predictive factors for recurrence‐free survival. Finally, we found that tDR ‐000620 participated in some important biological processes though GO and KEGG analysis. Taken together, our study reveals the expression profiles of tDR s in TNBC and non‐ TNBC CSC s. It offers helpful information to understand the tDR ‐000620 expression is responsible for the aggressive phenotype of BCSC s. It may provide predictive biomarkers and therapeutic targets for TNBC recurrence." @default.
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• W2894501980 date "2018-09-21" @default.
• W2894501980 modified "2023-10-15" @default.
• W2894501980 title "Identification of tRNA-derived small noncoding RNAs as potential biomarkers for prediction of recurrence in triple-negative breast cancer" @default.
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• W2894501980 doi "https://doi.org/10.1002/cam4.1761" @default.
• W2894501980 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6198211" @default.
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