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- W4361943669 abstract "<div>Abstract<p><b>Purpose:</b> We studied the expression levels of cyclins B1, D1, and E1 and the implications of cyclin overexpression for patient outcomes in distinct breast cancer subtypes defined by clinical variables and transcriptional profiling.</p><p><b>Experimental Design:</b> The expression levels of cyclins B1, D1, and E1 were quantified in 779 breast tumors and 53 cell lines using reverse phase protein arrays and/or transcriptional profiling.</p><p><b>Results:</b> Whereas cyclin E1 overexpression was a specific marker of triple-negative and basal-like tumors, cyclin B1 overexpression occurred in poor prognosis hormone receptor–positive, luminal B and basal-like breast cancers. Cyclin D1 overexpression occurred in luminal and normal-like cancers. Breast cancer subgroups defined by integrated expression of cyclins B1, D1, and E1 correlated significantly (<i>P</i> < 0.000001) with tumor subtypes defined by transcriptional profiling and clinical criteria. Across three hormone receptor–positive data sets, cyclin B1 was the dominant cyclin associated with poor prognosis in univariate and multivariate analyses. Although <i>CCNE1</i> was present in significantly higher copy numbers in basal-like versus other subtypes (ANOVA <i>P</i> < 0.001), <i>CCNB1</i> gene copy number did not show gain in breast cancer. Instead, cyclin B1 expression was increased in tumors with co-occurrence of <i>TP53</i> mutations and <i>MYC</i> amplification, a combination that seems to characterize basal-like and luminal B tumors. <i>CCNB1</i> gene expression was significantly correlated with <i>PLK, CENPE</i>, and <i>AURKB</i> gene expression.</p><p><b>Conclusion:</b> Cyclins B1, D1, and E1 have distinct expressions in different breast cancer subtypes. Novel <i>PLK, CENPE</i>, and <i>AURKB</i> inhibitors should be assessed for therapeutic utility in poor prognosis cyclin B1–overexpressing breast cancers.</p></div>" @default.
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- W4361943669 date "2023-03-31" @default.
- W4361943669 modified "2023-10-16" @default.
- W4361943669 title "Data from Integrative Analysis of Cyclin Protein Levels Identifies Cyclin B1 as a Classifier and Predictor of Outcomes in Breast Cancer" @default.
- W4361943669 doi "https://doi.org/10.1158/1078-0432.c.6517852" @default.
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