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药物对豚鼠输精管中去甲肾上腺素合成的影响。

Effect of drugs on the synthesis of noradrenaline in guinea-pig vas deferens.

作者信息

Boadle-Biber M C, Roth R H

出版信息

Br J Pharmacol. 1972 Dec;46(4):696-707. doi: 10.1111/j.1476-5381.1972.tb06894.x.

DOI:10.1111/j.1476-5381.1972.tb06894.x
PMID:4655268
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1666369/
Abstract
  1. Reserpine in vitro (10(-5)M) caused a profound inhibition (>85%) of the formation of both (14)C-catecholamine ((14)C-CA) and (14)C-dihydroxyphenylalanine ((14)C-DOPA) (in the presence of the amino acid decarboxylase inhibitor brocresine) from (14)C-tyrosine in guinea-pig vas deferens. The magnitude of the inhibition was similar for both (14)C-CA and (14)C-DOPA suggesting that the inhibition occurred primarily at the tyrosine hydroxylase step.2. One hour after in vivo treatment with reserpine (1 mg/kg) when tissue stores of noradrenaline (NA) were depleted by 50%, there was a significant inhibition of the formation of (14)C-DOPA. Twenty-four hours after such treatment, when endogenous NA could no longer be detected, synthesis of (14)C-DOPA was indistinguishable from untreated controls. However a 45% inhibition of (14)C-DOPA synthesis from (14)C-tyrosine could be produced in tissues which had been depleted of NA for 24 h or 48 h by the addition of reserpine, 10(-5)M, to the incubation medium.3. Addition of pteridine cofactor, 2-amino-6,7,-dimethyl-4-hydroxy-5,6,7,8-tetrahydropteridine, to the incubation medium in a concentration of 5 x 10(-3)M enhanced the formation of both (14)C-CA and (14)C-DOPA from (14)C-tyrosine in guinea-pig vas deferens. In 52 mM KCl Krebs-Henseleit medium (14)C-CA formation increased from 2.58+/-0.20 (nmol/g)/h to 6.35+/-0.47 (nmol/g)/h whilst (14)C-DOPA formation increased from 5.04+/-0.88 (nmol/g)/h to 11.29+/-0.59 (nmol/g)/h.4. Pteridine cofactor (5 x 10(-3)M) did not reverse the inhibition of (14)C-DOPA formation seen with reserpine (10(-5)M) in previously untreated tissues or in vasa deferentia from animals pretreated with reserpine 1 mg/kg for 24 hours. However, the inhibition did disappear in the presence of pteridine cofactor when treatment with reserpine was prolonged to 48 h and included two doses of reserpine of 2 mg/kg.5. Tyramine (5.8 x 10(-5)M) and bretylium (10(-5)M) in vitro inhibited the formation of (14)C-CA and (14)C-DOPA from (14)C-tyrosine to the same extent in guinea-pig vas deferens again indicating that their major site of action is on tyrosine hydroxylase. The inhibitory effects were reversed by pteridine cofactor.6. Synthesis of (14)C-NA from (14)C-tyrosine in calf splenic nerve was not increased by incubating the tissue in 52 mM KCl-Krebs-Henseleit solution.
摘要
  1. 利血平在体外(10⁻⁵M)能显著抑制豚鼠输精管中(14)C - 儿茶酚胺((14)C - CA)和(14)C - 二羟基苯丙氨酸((14)C - DOPA)(在氨基酸脱羧酶抑制剂溴克辛存在下)由(14)C - 酪氨酸生成,抑制率均超过85%。(14)C - CA和(14)C - DOPA的抑制程度相似,表明该抑制主要发生在酪氨酸羟化酶步骤。

  2. 用利血平(1mg/kg)进行体内处理1小时后,当去甲肾上腺素(NA)的组织储存量减少50%时,(14)C - DOPA的生成受到显著抑制。这种处理24小时后,当无法再检测到内源性NA时,(14)C - DOPA的合成与未处理的对照组无差异。然而,通过向孵育培养基中添加10⁻⁵M的利血平,在NA已耗尽24小时或48小时的组织中,(14)C - DOPA从(14)C - 酪氨酸的合成可被抑制45%。

  3. 向孵育培养基中添加浓度为5×10⁻³M的蝶啶辅因子2 - 氨基 - 6,7 - 二甲基 - 4 -羟基 - 5,6,7,8 - 四氢蝶啶,可增强豚鼠输精管中(14)C - CA和(14)C - DOPA由(14)C - 酪氨酸的生成。在52mM KCl的 Krebs - Henseleit培养基中,(14)C - CA的生成从2.58±0.20(nmol/g)/小时增加到6.35±0.47(nmol/g)/小时,而(14)C - DOPA的生成从5.04±0.88(nmol/g)/小时增加到11.29±0.59(nmol/g)/小时。

  4. 蝶啶辅因子(5×10⁻³M)不能逆转在先前未处理的组织中或在用1mg/kg利血平预处理24小时的动物的输精管中,利血平(10⁻⁵M)对(14)C - DOPA生成的抑制作用。然而,当利血平处理延长至48小时并包括两剂2mg/kg的利血平时,在蝶啶辅因子存在下抑制作用消失。

  5. 酪胺(5.8×10⁻⁵M)和溴苄铵(10⁻⁵M)在体外对豚鼠输精管中(14)C - CA和(14)C - DOPA由(14)C - 酪氨酸的生成抑制程度相同,再次表明它们的主要作用位点是酪氨酸羟化酶。其抑制作用可被蝶啶辅因子逆转。

  6. 将小牛脾神经组织在52mM KCl - Krebs - Henseleit溶液中孵育,(14)C - 酪氨酸生成(14)C - NA的量未增加。

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引用本文的文献

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Tetrahydrobiopterin increases in adrenal medulla and cortex: a factor in the regulation of tyrosine hydroxylase.四氢生物蝶呤在肾上腺髓质和皮质中增加:酪氨酸羟化酶调节的一个因素。
Proc Natl Acad Sci U S A. 1981 May;78(5):2703-6. doi: 10.1073/pnas.78.5.2703.
2
Tyrosine hydroxylase: activation by nerve stimulation.酪氨酸羟化酶:由神经刺激激活。
Proc Natl Acad Sci U S A. 1974 Nov;71(11):4283-7. doi: 10.1073/pnas.71.11.4283.
3
Formation of dopamine and noradrenaline in rat vas deferens: comparison with guinea-pig vas deferens.大鼠输精管中多巴胺和去甲肾上腺素的形成:与豚鼠输精管的比较。
Br J Pharmacol. 1975 Sep;55(1):73-8. doi: 10.1111/j.1476-5381.1975.tb07613.x.
4
An electrophysiological analysis of the effects of reserpine on adrenergic neuromuscular transmission.利血平对肾上腺素能神经肌肉传递作用的电生理分析
Br J Pharmacol. 1975 Sep;55(1):79-85. doi: 10.1111/j.1476-5381.1975.tb07614.x.

本文引用的文献

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Uptake of catecholamines by a particulate fraction of the adrenal medulla.肾上腺髓质微粒体部分对儿茶酚胺的摄取
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MICROMETHODS FOR MEASURING PHENYLALANINE AND TYROSINE IN SERUM.血清中苯丙氨酸和酪氨酸的微量测定方法
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Metabolism of norepinephrine-H3 released by tyramine and reserpine.由酪胺和利血平释放的去甲肾上腺素-H3的代谢
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Some characteristics of brain tyrosine hydroxylase.脑酪氨酸羟化酶的一些特性。
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Localization of different steps in noradrenaline synthesis to different fractions of a bovine splenic nerve homogenate.去甲肾上腺素合成中不同步骤在牛脾神经匀浆不同组分中的定位。
Biochem Pharmacol. 1967 Sep 9;16(9):1719-28. doi: 10.1016/0006-2952(67)90247-x.
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The effect of reserpine upon the synthesis of norepinephrine in the isolated rabbit heart.利血平对离体兔心脏去甲肾上腺素合成的影响。
J Pharmacol Exp Ther. 1967 Aug;157(2):290-302.
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Increased synthesis and release of noradrenaline and dopamine during nerve stimulation.神经刺激期间去甲肾上腺素和多巴胺的合成及释放增加。
Life Sci. 1967 Jan 1;6(1):97-104. doi: 10.1016/0024-3205(67)90366-9.
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Acceleration of norepinephrine synthesis in the rat submaxillary gland in vivo during sympathetic nerve stimulation.交感神经刺激期间大鼠颌下腺去甲肾上腺素合成在体内的加速。
Life Sci. 1967 Jan 1;6(1):45-51. doi: 10.1016/0024-3205(67)90360-8.