Presynaptic modulation of neurotransmitter release by endogenous angiotensin II in brown adipose tissue.
Presynaptic modulation of neurotransmitter release by endogenous angiotensin II in brown adipose tissue.
复制标题
棕色脂肪组织中内源性血管紧张素 II 对神经递质释放的突触前调节。
DOI：
10.1007/978-3-7091-9175-0_17
复制
发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Dwoskin,LP
中科院分区：
文献类型：
--
作者：
Cassis,LA;Dwoskin,LP
Angiotensin II (All) increased the evoked release of [3H]- norepinephrine (NE) from superfused slices of interscapular fat (ISF). To determine if All was endogenously formed and subsequently released from ISF, immunoreactive All was measured in the superfusate from ISF slices. The concentration of All detected in the ISF superfusate was 4.51 pg/mg tissue wet wt/30ml collected over a 30-min period. In response to electrical field stimulation, All concentration in the superfusate increased (maximum of 2-fold). To determine if All modulates sympathetic neurotransmission, the effect of All (O.l-lOnM) and, in separate experiments the effect of the AII-1 receptor antagonist DuP 753 (1 nM-1µM) on the evoked release of [3H]-NE were examined in ISF slices. All and DuP 753 increased (100% above control) and decreased (43% of control), respectively, the evoked [3H]-NE release from ISF slices. The effect of DuP 753 was not altered by the inclusion of neuronal uptake inhibitors (nomifensine or desipramine) in the superfusion buffer. These results suggest that endogenous All enhances the evoked release of [3H]-NE from ISF.
