- Castration enhances expression of glial fibrillary acidic protein and sulfated glycoprotein-2 in the intact and lesion-altered hippocampus of the adult male rat. Day, J.R., Laping, N.J., McNeill, T.H., Schreiber, S.S., Pasinetti, G., Finch, C.E. Mol. Endocrinol. (1990)