"Hippocampal cytochrome P450s synthesize brain neurosteroids
which are paracrine neuromodulators of synaptic signal transduction"
Biochem. Biophys. Acta (2003) 1619, 301-316
[PDF]
"Neurosteroids are 4th generation neuromessengers in the brain:
Cell biophysical analysis of steroid signal transduction"
Advances in Biophysics (2003) 37, 1-30
[PDF]