首页> 外文期刊>American Journal of Physiology >Cardiac norepinephrine transporter protein expression is inversely correlated to chamber norepinephrine content
【24h】

Cardiac norepinephrine transporter protein expression is inversely correlated to chamber norepinephrine content

机译:心脏去甲肾上腺素转运蛋白的表达与室去甲肾上腺素的含量呈负相关

获取原文
获取原文并翻译 | 示例
           

摘要

norepinephrine (NE) released from cardiac sympathetic nerve terminals is removed from the neuroeffector junction by the neuronal NE transporter (NET), which belongs to the large gene family of Na+/CP-dependent neurotransmitter transporters (8, 9, 40). NET is in sympathetic nerve fibers of the heart (4,15,33) and is enriched in nerve varicosities (43, 44). NET in sympathetic fibers is critical for removal of extracellular NE in the heart, and reuptake is reduced in sympathetically denervated animals (4, 18, 23). There are numerous studies that indicate the presence of NET in the heart and altered reuptake in the diseased heart (12, 13, 15, 17,33). NE reuptake in the whole heart is highly efficient, and it is estimated that -90% of released NE is cleared by NET (14, 15). There is approximately a 20-to-l ratio of released NE to NE "spillover," in which only -1 out of 20 molecules of released NE is lost to the plasma (28). There are regional differences in NE reuptake among chambers of the heart and within a single heart chamber (5, 10), but it is not known whether this is related to chamber-specific differences in NET.
机译:从心脏交感神经末梢释放的去甲肾上腺素(NE)通过神经元NE转运蛋白(NET)从神经效应连接处去除,神经元NE转运蛋白属于依赖Na + / CP的神经递质转运蛋白的大型基因家族(8、9、40)。 NET位于心脏的交感神经纤维中(4、15、33),并富含神经静脉曲张(43、44)。交感神经纤维中的NET对于去除心脏中的细胞外NE至关重要,在交感神经支配的动物中再摄取减少(4,18,23)。有大量研究表明心脏中存在NET,而患病心脏中的再摄取发生了改变(12、13、15、17、33)。 NE在整个心脏中的重摄取效率很高,据估计NET可清除-90%释放的NE(14、15)。释放的NE与NE的“溢出”比例大约为20:1,其中释放的20个NE分子中只有-1丢失到血浆中(28)。心脏各腔之间和单个心脏腔内的NE重摄取存在区域差异(5、10),但尚不清楚这是否与NET中特定于腔的差异有关。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号