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논문 기본 정보

자료유형
학술저널
저자정보
Lee, Jean-Young (Department of Pharmacology College of Pharmacy, Seoul National University) Kim, Hae-Jung (Department of Pharmacology College of Pharmacy, Seoul National University) Jung, Eun-Young (Department of Pharmacology College of Pharmacy, Seoul National University) Chung, Hye-Joo (National Institute of Safety Research, Seoul) Ko, Kwang-Ho (Department of Pharmacology College of Pharmacy, Seoul National University Seoul, Center for Biofunctional Molecules, Postech, Pohang)
저널정보
한국응용약물학회 The journal of applied pharmacology : the official journal of the Korean Society of Applied Pharmacology The journal of applied pharmacology : the official journal of the Korean Society of Applied Pharmacology 제1권 제2호
발행연도
1993.1
수록면
171 - 176 (6page)

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Purpose of the present study was to clarify the role of noradrenergic neural activities in hypothalamus for either triggering or maintaining hypertension in deoxycorticosterone (DOCA)-salt hypertensive rats. Two groups of animals were prepared: 1) normotensive Wistar rats and 2) DOCA-salt induced hypertensive rats. Voltage dependent $^{45}Ca^{++}$ uptake, endogenous norepinephrine release, and the catecholamine content in the hypothalamus of DOCA-salt hypertensive and normotensive Wistar rats were compared. Animals at 4, 6 and 16 week-old of two groups were sacrificed by decapitation and hypothalamus was dissected out. Voltage dependent calcium uptake and norepinephrine release were determined from hypothalamic synaptosomes either in low potassium or high potassium stimulatory condition by using $^{45}Ca^{++}$ isotope and HPLC-ECD technique. Degrees of voltage dependent $^{45}Ca^{++}$ uptake and norepinephrine release in hypothalamic synaptosomes of 16-week-old DOCA-salt hypertensive rats were significantly greater than those of age matched normotensive control rats. The norepinephrine and dopamine contents of hypothalamus were about the same in two groups of animals. These results suggest that the alteration of evoked norepinephrine release related to calcium uptake in hypothalamus may play a role in the maintenance of hypertension in DOCA-salt hypertensive rats.

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