Effects of estradiol and dexamethasone on choline acetyltransferase activity in various rat brain regions.
Estradiol, administered to ovariectomized rats, increased choline acetyltransferase (ChAT) activity in the caudate nucleus, cortex, hippocampus, and hypothalamus, suggesting possibly widespread central cholinergic involvement in estrus-related behavior. Dexamethasone also, except in hypothalamus, increased ChAT activity, notably (50%) in hippocampus. ChAT activity changes did not correlate with reported regional hormone receptor density. Estradiol's effect in the caudate suggests that hormone receptor and affected enzyme may not necessarily coexist intraneuronally.
Kaufman
H
H
Division of Molecular Biology and Neural Regeneration, Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY 10962.
Vadasz
C
C
Lajtha
A
A
D000818:Animals; D001921:Brain / Q000187:drug effects / Q000201:enzymology*; D002421:Caudate Nucleus / Q000187:drug effects / Q000201:enzymology; D002540:Cerebral Cortex / Q000187:drug effects / Q000201:enzymology; D002795:Choline O-Acetyltransferase / Q000378:metabolism*; D002799:Cholinergic Fibers / Q000187:drug effects / Q000201:enzymology*; D003907:Dexamethasone / Q000494:pharmacology*; D004958:Estradiol / Q000494:pharmacology*; D005260:Female; D006624:Hippocampus / Q000187:drug effects / Q000201:enzymology; D007031:Hypothalamus / Q000187:drug effects / Q000201:enzymology; D010052:Ovariectomy; D051381:Rats; D011919:Rats, Inbred Strains
D004958:Estradiol; D003907:Dexamethasone; D002795:Choline O-Acetyltransferase