ERBB2 and posterior cortical atrophy: Since Plexin B1 and D1 are known to mediate RTK activation such as HER2/ErbB2 (Swiercz et al, 2004, 2008; Casazza et al, 2010) and MET (Giordano et al, 2002), we therefore sought to examine whether NRP1, NRP2, Plexin B1, and Plexin D1 are receptors for SEMA3C in PCa cells.