CXCR4 and breast cancer: Furthermore, through immunohistochemical analysis, we found that normal duct epithelium expressed GLI1 predominantly in the nucleus along with TSHZ2 and CtBP2: breast cancer cells, which did not express TSHZ2 but CtBP2, exhibited the increase in the expression of AEBP1 and CXCR4 and also in the cytoplasmic distribution of GLI1.