Analysis of SFRP1 and BDNF expression in human breast tissues.

<p>(A) Immunohistochemical staining of human breast tissues is shown exemplarily. SFRP1 and BDNF protein expression of tissue samples from the same patient (a and d, b and e) is shown. c and f: negative controls of SFRP1 and BDNF immunohistochemical staining, respectively. Scale bar: 100 µm. (B) In the left columns three tissues (patient #1 - #3) exhibit no or weak staining of SFRP1 and BDNF whereas the right columns represent three tissues (patient #4 - #6) that have a strong SFRP1 and BDNF protein expression. These images illustrate exemplarily the correlation of SFRP1 and BDNF protein expression <i>in vivo</i>. Scale bars: 100 µm.