このエントリーをはてなブックマークに追加


ID 30309
JaLCDOI
フルテキストURL
fulltext.pdf 1.57 MB
著者
Fujino, Kazuyuki Okayama University
抄録

The concentrations and alpha-methyl-p-tyrosine (alpha-MPT) induced disappearance of catecholamines, adrenaline, noradrenaline and dopamine, were measured in selected areas of the brainstem and hypothalamus of spontaneously hypertensive rats (SHR) and deoxycorticosterone acetate (DOCA)-salt hypertensive rats. The catecholamine levels were measured by a sensitive radioenzymatic assay method combined with microdissection of the rat brain. The adrenaline concentration was higher in the area A1 of young SHR, but not in adult SHR, than in age-matched control rats. Noradrenaline concentrations and the alpha-MPT induced noradrenaline disappearance were less in the rostral part of the nucleus tractus solitarii (NTS) and the nucleus hypothalamic anterior of young SHR, and in the rostral part of the NTS of adult SHR. On the other hand in DOCA-salt hypertensive rats, the concentrations of adrenaline and noradrenaline were the same as in control rats in the examined areas. The alpha-MPT induced noradrenaline disappearance was less in the rostral part of the NTS of DOCA-salt hypertensive rats. Dopamine concentrations and the alpha-MPT induced dopamine disappearance were the same in the examined areas of SHR and DOCA-salt hypertensive rats. The results suggest that SHR have a change in adrenergic neural activity in the brainstem and a decrease in noradrenergic neural activity in the brainstem and hypothalamus while DOCA-salt hypertensive rats have a decrease in noradrenergic neural activity in the brainstem. Such changes in brain catecholaminergic neurons may have played an important role in the development of hypertension in these rats.

キーワード
catecholamines
brainstem
hypothalamus
spontaneously hypertensive rats(SHR)
DOCA-salt hypertensive rats
Amo Type
Article
出版物タイトル
Acta Medica Okayama
発行日
1984-08
38巻
4号
出版者
Okayama University Medical School
開始ページ
325
終了ページ
340
ISSN
0386-300X
NCID
AA00508441
資料タイプ
学術雑誌論文
言語
英語
論文のバージョン
publisher
査読
有り
PubMed ID
Web of Science KeyUT