In situ hybridization was carried out as described previously (He and Soriano, 2013 (link)). Pten antisense RNA probes was generated using primers: 5-TTACAGTTGGGCCCCGTACA-3 and 5- TAAAACACCCACACAATGACAAGA-3. For immunohistochemistry, samples were sectioned at 10μm and subjected to standard protocols using primary antibodies to anti-phospho-Akt (1:25, Cell Signaling Technology 9271), anti-Neurofilament-L (1:100, Cell Signaling Technology 2837), HRP-conjugated secondary antibody (1:100, Cell Signaling Technology 7074), anti-Sp7(1:200, Abcam ab94744) and AP-conjugated secondary antibody (1:100, Novus Biologicals, NB7157).)