The influence of nicotine on local cerebral blood flow in rats.
Local cerebral blood flow (LCBF) was measured in conscious rats during an acute nicotine infusion. LCBF was measured using the autoradiographic iodoantipyrine method. LCBF was unchanged in most brain structures during nicotine infusion compared to controls. Significant (P less than 0.05) increases were found in 3 structures (lateral geniculate body, superior colliculus, anteroventral nucleus of the thalamus). These structures have already shown increases in local glucose utilization in a previous study [2]. The observed increases in LCBF are interpreted to be secondary to metabolic activation by nicotine indicating the lack of a direct action of nicotine on cerebral blood vessels.
Grünwald
F
F
Clinic for Nuclear Medicine, University of Bonn, F.R.G.
Schröck
H
H
Kuschinsky
W
W
D000818:Animals; D001921:Brain / Q000187:drug effects / Q000378:metabolism; D002560:Cerebrovascular Circulation / Q000187:drug effects*; D003243:Consciousness; D005829:Geniculate Bodies / Q000098:blood supply / Q000187:drug effects; D005947:Glucose / Q000378:metabolism; D008297:Male; D009538:Nicotine / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D013477:Superior Colliculi / Q000098:blood supply / Q000187:drug effects; D013787:Thalamic Nuclei / Q000098:blood supply / Q000187:drug effects
D009538:Nicotine; D005947:Glucose