Figure 1. Increased expression of PKCδ negatively correlates with prognosis in ErbB2 positive human breast cancer.
A. Overexpression (red) and underexpression (blue) of PKCδ in 21 human breast cancer data sets. Intensity of the cell color corresponds to the top percentage of ranked genes, with 50% (white) representing no change between tumor sets. The median rank for PKCδ overexpression in ErbB2 positive tumors across each data set is 2,871 (P=0.01), while the underexpression median rank is 13,701 (P=0.827). B, C, and D. Kaplan-Meier analysis, using relapse-free survival as endpoint, for (B) ErbB2 positive tumors (four data sets, n= 122, P=0.017), (C) All molecular subtypes (four data sets, n= 914, P=0.0002), and (D) Triple-negative (ER-/PR-/ErbB2-)(four data sets, n=143, P=0.488), stratified into two quantiles base on high (red line) or low (gray line) PKCδ expression.