Immunohistochemical detetion of CLU in ovarian cancer tissue samples A. Representative images from immunohistochemistry detection of CLU expression in primary tumor specimens from chemo-responsive tumor tissues (1). CLU staining is moderate or very low. Recurrent tumor from the same patient also showed extremely limited staining of CLU (2). CLU staining in the primary tumor from chemo-resistant tumor tissue (3) showed high CLU expression. Recurrent tumors from the same patients, however, showed high CLU expression after chemotherapy (4).B. Representative photos of immunohistochemical expression of CLU in 47 tissue samples of ovarian cancer. 1) high expression, 2) moderate expression, 3) low expression, and 4) negative expression. C. Kaplan-Meier survival curve according to CLU expression (1), stage (2) and histology (3). Survival of patients with high and moderate expression of CLU showed significantly poor survival than that of low and negative expression of CLU (p = 0.04).