Actions of cysteinyl leukotrienes in the enteric nervous system of guinea-pig stomach and small intestine.

Actions of cysteinyl leukotrienes in the enteric nervous system of guinea-pig stomach and small intestine.
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半胱氨酰白三烯在豚鼠胃和小肠肠神经系统中的作用。

DOI:
10.1016/s0014-2999(02)02820-0
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发表时间:
2003
影响因子:
5
通讯作者:
Wood,JackieD
Wood,JackieD
中科院分区:
医学2区
文献类型:
--
作者:
Liu,Sumei;Hu,HongZhen;Gao,Chuanyun;Gao,Na;Wang,Guodu;Wang,Xiyu;Gao,Xiang;Xia,Yun;Wood,JackieD

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应用细胞内微电极、神经元示踪剂注射技术和免疫组织化学方法,研究了半胱氨酰白三烯(CysLTs)对豚鼠胃和小肠肠神经元电行为和突触活动的影响。应用白三烯C_4、白三烯D_4或白三烯E_4可使小肠肌间神经元和粘膜下神经丛神经元产生缓慢激活的去极化反应,而对胃神经元则无影响。半胱氨酰白三烯引起的肠神经元去极化与输入阻力增加和兴奋性增强有关。AH型神经元超极化后电位被抑制。半胱氨酰白三烯的去极化作用对河豚毒素和环氧合酶抑制剂具有抗性。CysLT 1受体拮抗剂(E)-3-[3-[2-(7-氯-2-喹啉基)乙烯基]苯基][[3-二甲基氨基)-3-氧代丙基]硫基]甲基]硫基]丙酸(MK 571),1-[2-羟基-3-丙基-4-[4-(三氟甲基)苯基]丙酸(1H-四唑-5-基)丁氧基]苯基}乙酮(LY 171883)和α-戊基-3-(2-喹啉甲氧基)苯甲醇(REV 5901),也不是双重CysLT 1/CysLT 2受体拮抗剂6(R)-(4′-羧基苯硫基)-5(S)-羟基-7(E),9(E),11(Z),14(Z)-二十碳四烯酸(BAY u9773)显著改变半胱氨酰白三烯的去极化作用。神经传递不受半胱氨酰白三烯的影响。结果表明,半胱氨酰白三烯通过对肠神经元的兴奋作用参与肠免疫神经通讯。介导这些作用的受体不同于目前公认的半胱氨酰白三烯受体亚型(CysLT 1和CysLT 2受体),并可能代表一种新的受体亚型。
Conventional intracellular microelectrodes, neuronal tracer injection techniques and immunohistochemistry were used to study the actions of cysteinyl leukotrienes (CysLTs) on electrical and synaptic behavior of enteric neurons in guinea-pig stomach and small intestine. Bath application of leukotriene C4, leukotriene D4or leukotriene E4evoked a slowly activating depolarizing response in most of the myenteric and submucous plexus neurons in the small intestine while no effect was observed in gastric neurons. The depolarization evoked by cysteinyl leukotrienes in intestinal neurons was associated with increased input resistance and enhanced excitability. Suppression of hyperpolarizing after-potentials occurred in AH type neurons. The depolarizing action of cysteinyl leukotrienes was resistant to tetrodotoxin and cyclooxygenase inhibitors. Neither the CysLT1receptor antagonists (E)-3-[[[3-[2-(7-chloro-2-quinolinyl)ethenyl]phenyl][[3-dimethylamino)-3-oxopropyl]thio]methyl]thio]-propanoic acid (MK 571), 1-[2-hydroxy-3-propyl-4-[4-(1H-tetrazol-5-yl)butoxy]phenyl}-ethanone (LY 171883) and α-pentyl-3-(2-quinolinylmethoxy)-benzenemethanol (REV 5901), nor the dual CysLT1/CysLT2receptor antagonist 6(R)-(4′-carboxyphenylthio)-5(S)-hydroxy-7(E),9(E),11(Z),14(Z)-eicosatetraenoic acid (BAY u9773) significantly altered the depolarizing action of the cysteinyl leukotrienes. Neurotransmission was unaffected by the cysteinyl leukotrienes. The results suggested involvement of cysteinyl leukotrienes in enteric immuno-neural communication through excitatory actions on enteric neurons. The receptor mediating these effects was distinct from currently recognized cysteinyl leukotriene receptor subtypes (CysLT1and CysLT2receptors) and may represent a new receptor subtype.
硫肽白三烯 D4 和 E4 对大鼠和兔体外回肠离子转运的影响。
DOI: 10.1152/ajpgi.1988.255.2.g175
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DOI: --
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