HGF and breast cancer: Consistent with the microarray analysis, IHC using anti-CGRP and anti-HGF antibody showed increased HGF expression in CGRP+ DRG SNs in the 4T1 BC mice compared to sham mice (Fig. 5A and 5B) and intense HGF expression on CGRP+ SNs running through the cortical bone in the 4T1 BC mice (Fig. 5C, right, white arrows).