Reduced immunoreactivity of type I adenylyl cyclase in the postmortem brains of alcoholics.
Reduced adenylyl cyclase activity after chronic ethanol exposure has been reported. In this study, we investigated by immunoblotting whether quantitative changes of adenylyl cyclase isoforms (type I, type II, and type V/VI adenylyl cyclases) exist in membrane preparations of the temporal cortex obtained from six alcoholics and six age-matched controls. The immunoreactivity of type I adenylyl cyclase decreased significantly in the temporal cortex of alcoholics when compared with controls (p < 0.05), whereas those of type II and type V/VI adenylyl cyclases showed no changes between the groups. These findings suggest that these isoform-specific afterations in the adenylyl cyclase system may be involved in the pathophysiology of alcoholism.
Hashimoto
E
E
Department of Psychiatry, University of Würzburg, Germany.
Frölich
L
L
Ozawa
H
H
Saito
T
T
Maurer
K
K
Böning
J
J
Takahata
N
N
Riederer
P
P
D000262:Adenylyl Cyclases / Q000378:metabolism*; D000328:Adult; D000368:Aged; D000437:Alcoholism / Q000201:enzymology / Q000473:pathology*; D001921:Brain / Q000187:drug effects* / Q000201:enzymology / Q000473:pathology; D000431:Ethanol / Q000009:adverse effects*; D005260:Female; D006801:Humans; D015151:Immunoblotting; D007527:Isoenzymes / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D015290:Second Messenger Systems / Q000187:drug effects; D015398:Signal Transduction / Q000187:drug effects*; D013570:Synaptic Membranes / Q000187:drug effects / Q000201:enzymology / Q000473:pathology; D013702:Temporal Lobe / Q000187:drug effects / Q000201:enzymology / Q000473:pathology
D007527:Isoenzymes; D000431:Ethanol; D000262:Adenylyl Cyclases