Variation of monoamines and their metabolite contents in the cerebrospinal fluid of conscious rats.
To study the circadian rhythm of the monoamine and metabolite contents, cerebrospinal fluid was taken from the cisterna magna through a polyethylene catheter tube every 4 hr in the conscious rat. Norepinephrine and 3-methoxy-4-hydroxy-phenylglycol were found to describe a rhythm with the maximal content occurring during the dark phase and the minimal content occurring during the light phase. Dopamine levels increased significantly during the light phase compared with the dark phase. These results, given that cerebrospinal fluid can be taken chronically from conscious rats, indicate that our present method may be suitable for estimating changes in brain monoamine and metabolite contents.
Wada
Y
Y
Department of Pharmacology, Oita Medical University, Japan.
Egashira
T
T
Takayama
F
F
Yamanaka
Y
Y
Takada
K
K
Takeda
H
H
Matsumiya
T
T
D015102:3,4-Dihydroxyphenylacetic Acid / Q000134:cerebrospinal fluid; D000818:Animals; D015306:Biogenic Monoamines / Q000134:cerebrospinal fluid* / Q000378:metabolism*; D001923:Brain Chemistry; D002940:Circadian Rhythm / Q000502:physiology; D003243:Consciousness; D004298:Dopamine / Q000134:cerebrospinal fluid; D006719:Homovanillic Acid / Q000134:cerebrospinal fluid; D006897:Hydroxyindoleacetic Acid / Q000134:cerebrospinal fluid; D008297:Male; D008734:Methoxyhydroxyphenylglycol / Q000134:cerebrospinal fluid; D009638:Norepinephrine / Q000134:cerebrospinal fluid; D051381:Rats; D017208:Rats, Wistar; D012701:Serotonin / Q000134:cerebrospinal fluid
D015306:Biogenic Monoamines; D015102:3,4-Dihydroxyphenylacetic Acid; D012701:Serotonin; D008734:Methoxyhydroxyphenylglycol; D006897:Hydroxyindoleacetic Acid; D004298:Dopamine; D009638:Norepinephrine; D006719:Homovanillic Acid