Acute stress induces shift from constitutive to iNOS signaling in hippocampus.
Acute stress induces rapid down-regulation of hippocampal nNOS mRNA expression.
Striatal NO following acute stress is predominately iNOS-mediated.
Profile of pro-inflammatory responses differ in hippocampus and striatum.
Hippocampal iNOS and cytokine response indicate switch to adaptive immunity.