Supplementary Figure 2 from Activation of the <i>NOTCH</i> Pathway in Head and Neck Cancer

PDF file - 169K, NOTCH pathway activation in HNSCC. A, Immunohistochemical analysis of NOTCH1, HES1 and HEY1 protein expression in HNSCC. Tissue microarray arrays with quadruplicates of samples from each of 56 HNSCC tumor and 11 non-tumor patients were stained with anti-NOTCH1, anti-HES1 or anti-HEY1 antibody, as described in methods. Top, the heat-map of immunohistochemical analysis for tissue microarray slides. Rows, genes; column, each individual sample. The average staining for four tissues was categorized to Strong (brown), Moderate (grey) or Weak/Negative (blue) staining. Samples are ranked by the pathology ID numbers in tumor (left) and normal (right) groups. Bottom: quantification of immunohistochemical data. The number and percentage of tumor (Tu) and normal (No) patient in strong, moderate and weak/negative category was quantified. P-values were calculated by comparing numeric scores in tumor vs normal sample by independent t test. The samples 57964, 58602, 22146, 5931, 26514 represent tumor samples X6, X7, X11, X28 and X34 from the original discovery cohort of 44 HNSCC tumors. B, Representative immunohistochemical results. The representative slides of positive or moderate staining are shown for tumors and compared to normal tissue. Bar, 100 um equivalent. Tumor (T) and normal (N) tissues on each sample are labeled. ID 22146 represented X11 samples, which were used both in array and in immunohistochemical analysis, where protein and RNA expression strongly correlate.