Nat. Neurosci. 8, 664–672 (2005)

A sentence in this paper contained an error. The fourth sentence of the abstract should have read as follows: “In the hippocampus of the wild-type mice after stress, as well as in the cell lines, activation of glucocorticoid receptors greatly increased the expression and enzymatic activity of proteins in the MAPK signaling pathway and led to an increase in the levels of both Egr-1 mRNA and protein.”