Repetitive electroacupuncture causes prolonged increased met-enkephalin expression in the rVLM of conscious rats.

Repetitive electroacupuncture causes prolonged increased met-enkephalin expression in the rVLM of conscious rats.
复制标题

DOI:
10.1016/j.autneu.2012.07.001
复制
发表时间:
2012-09-25
影响因子:
2.7
通讯作者:
Longhurst, John C.
Longhurst, John C.
中科院分区:
医学4区
文献类型:
--
作者:
Li, Min;Tjen-A-Looi, Stephanie C.;Guo, Zhi-Ling;Longhurst, John C.

文献摘要

参考文献

被引文献

相似文献

头端腹外侧延髓 (rVLM) 中的脑啡肽能神经元是脑干中重要的交感前区域,通过在正中神经上方的 P5-P6 穴位进行 30 分钟的低频 (2 Hz) 电针 (EA) 激活。为了更接近地模拟针灸的临床应用,我们在 72 小时内对未镇静的清醒大鼠进行 EA 两次,每次 30 分钟,以检查其长期作用。我们假设重复 EA 会增加未镇静的清醒大鼠 rVLM 中的前脑啡肽原 mRNA 和甲硫氨酸脑啡肽。大鼠在双侧 P5-P6 穴位接受 EA(1-4 mA,0.5 ms,2 Hz)或假刺激(无电刺激的针放置)两次。在最终 EA 或假手术后 24 或 48 小时测量 rVLM 中的前脑啡肽原 mRNA 及其肽甲硫脑啡肽。与假手术相比,前脑啡肽原 mRNA 水平的相对比率(用 18s 管家基因标准化)在 24 小时时几乎翻倍(6.1 ± 0.79 与 3.1 ± 0.47)。与假手术相比,在接受相同处理的几只大鼠的 rVLM 组织中测量的甲硫氨酸脑啡肽在 24 小时后重复 EA 增加了 68%,在 48 小时后增加了 51%。这些发现表明,在清醒的大鼠中重复应用 EA 可以增强 rVLM 中脑啡肽的转录和翻译数天。由于 rVLM 中的阿片类药物对 EA 对交感神经流出的作用有重要贡献,因此这种机制可能有助于针灸对患者血压升高的长期作用。
Enkephalinergic neurons in the rostral ventrolateral medulla (rVLM), an important presympathetic region in the brainstem, are activated by 30 min of low frequency (2 Hz) electroacupuncture (EA) at acupoints P5–P6, which overlie the median nerves. To more closely model clinical application of acupuncture, we administered EA for 30 min twice over a 72 hr period to unsedated conscious rats to examine its prolonged action. We hypothesized that repetitive EA would increase preproenkephalin mRNA and met-enkephalin in the rVLM of unsedated conscious rats. Rats received either EA (1 – 4 mA, 0.5 ms, 2 Hz) or sham stimulation (needle placement without electrical stimulation) twice at P5–P6 acupoints bilaterally. Preproenkephalin mRNA and its peptide met-enkephalin in the rVLM were measured 24 or 48 hrs after the final EA or sham procedure. Relative ratios of preproenkephalin mRNA levels (normalized with the 18s housekeeping gene) were almost doubled at 24 hrs compared to sham (6.1 ± 0.79 vs. 3.1 ± 0.47). Met-enkephalin measured in rVLM tissue pooled from several rats exposed to the same treatment was increased by repeated EA by 68% after 24 hrs and 51% after 48 hrs, relative to sham. These findings suggest that repeated application of EA in the conscious rats enhances transcription and translation of enkephalin in rVLM for days. Since opioids in the rVLM contribute importantly to the action of EA on sympathetic outflow, this mechanism may contribute to the prolonged action of acupuncture on elevated blood pressure in patients.
DOI: 10.1152/japplphysiol.00477.2009
发表时间: 2010-05-01
影响因子: 3.3
作者:
Moazzami, Ali;Tjen-A-Looi, Stephanie C.;Longhurst, John C.
通讯作者: Longhurst, John C.
DOI: 10.1016/j.brainres.2004.09.059
发表时间: 2004-12-24
期刊: BRAIN RESEARCH
影响因子: 2.9
作者:
Guo, ZL;Moazzami, AR;Longhurst, JC
通讯作者: Longhurst, JC
DOI: 10.1152/japplphysiol.01282.2004
发表时间: 2005-06-01
影响因子: 3.3
作者:
Crisostomo, MM;Li, P;Longhurst, JC
通讯作者: Longhurst, JC
DOI: 10.1152/ajpheart.1999.276.6.h2127
发表时间: 1999-06-01
影响因子: 4.8
作者:
Chao, DM;Shen, LL;Longhurst, JC
通讯作者: Longhurst, JC
DOI: 10.1016/j.autneu.2010.05.006
发表时间: 2010-12-08
影响因子: 2.7
作者:
Li, Peng;Tjen-A-Looi, Stephanie C.;Guo, Zhi-Ling;Longhurst, John C.
通讯作者: Longhurst, John C.