Effect of prostaglandins on renal epithelial electrolyte transport.

Effect of prostaglandins on renal epithelial electrolyte transport.
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前列腺素对肾上皮电解质转运的影响。

DOI:
10.1038/ki.1981.82
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发表时间:
1981
影响因子:
19.6
通讯作者:
Kokko,JP
Kokko,JP
中科院分区:
医学1区
文献类型:
--
作者:
Kokko,JP

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众所周知,肾脏前列腺素(PG)水平的变化可能会影响盐和水的排泄。事实上,人们普遍认为,在动物急性或长期摄入盐的情况下,PG 具有利尿钠作用,但其在水利尿中的作用尚不清楚 [1, 2]。我们自己在清醒的狗 [3] 和麻醉大鼠 [411] 中进行的清除率研究表明,甲氯芬那酯可以减弱容量扩张介导的尿尿作用,而不会改变 GFR 或肾血流量。因此,这些研究与其他支持肾 PG 具有利尿钠作用的研究结果一致 [5-14]。然而,一个更具争议性的问题是,PG 是否通过直接上皮效应影响盐和水的转运,或者 PG 是否通过一些次要现象(例如血流动力学的变化或生化信使的变化)介导其影响。体内微穿刺​​和体外微灌注技术在评估化合物的作用是直接还是间接方面比清除技术具有一些独特的优势。本文的目的是使用体内和体外微穿刺和微灌注技术检查 PG 对各个肾单位段的影响,特别是远端小管段(粗升肢、远曲小管和集合管段)。体内微穿刺​​研究体内微穿刺​​研究检查了 PG 对麻醉大鼠和狗不同肾单位段钠转运的影响。使用了两种不同的方法:血管内或管内输注外源性 PG;或抑制内源性PG。除了少数例外,已发表的研究与他们的结论非常一致。效果将根据具体情况分段总结
It is well appreciated that changes in renal prostaglandin (PG) levels may affect the excretion of salt and water. In fact, a general consensus exists that PG's are natriuretic during conditions where ani-mals have access acutely or chronically to salt, but their role in water diuresis is less clear [1, 2]. Our own clearance studies in conscious dogs [3] and anesthetized rats [411 show that meclofenamate blunts the volume-expansion-mediated chioruresis without changes in GFR or renal blood flow. Thus, these studies are consistent with the findings of others who have supported a natriuretic role for renal PG's [5—14]. A more controversial issue, however, has been whether the PG's affect salt and water transport by direct epithelial effects or wheth-er PG's mediate their effects by some secondary phenomena such as changes in hemodynamics or changes in biochemical messengers. In vivo micro-puncture and in vitro microperfusion techniques offer some unique advantages over clearance techniques to assess whether the effects of a compound are direct or indirect. The purpose of this paper is to examine the effects of PG's on various nephron segments with specific emphasis on segments of the distal tubule (thick ascending limb, distal convolut-ed tubule, and collecting duct segments) using in vivo and in vitro micropuncture and microperfusion techniques.In vivo micropuncture studies In vivo micropuncture studies have examined the effect of PG's on sodium transport across various nephron segments in both the anesthetized rat and dog. Two different approaches have been used: either intravascular or intratubular infusion of exogenous PG's; or inhibition of endogenous PG's. With few exceptions, the published studies are remarkably consistent with their conclusions. The effects will be summarized segmentally with specific em-
前列腺素对离体髓质肾单位节段钠转运的影响。
DOI: 10.1152/ajprenal.1977.232.4.f383
发表时间: 1977
期刊: The American journal of physiology
影响因子: --
作者:
L. Fine;W. Trizna
通讯作者: W. Trizna
DOI: 10.1172/jci108625
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期刊: The Journal of clinical investigation
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作者:
J. B. Gross;J. Kokko
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哺乳动物的排泄:肾盂在改变尿液浓度和成分中的作用。
DOI: --
发表时间: 1977
期刊: Federation proceedings
影响因子: --
作者:
B. Schmidt
通讯作者: B. Schmidt
管腔侧前列腺素 E2 对肾小管 22Na 流出的影响:示踪剂显微注射研究 1
DOI: --
发表时间: 1977
期刊: Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine
影响因子: --
作者:
M. Kauker
通讯作者: M. Kauker
前列腺素对肾脏和红细胞中电解质和水的运输缺乏直接抑制作用。
DOI: 10.1016/0090-6980(77)90022-3
发表时间: 1977
期刊: Prostaglandins
影响因子: --
作者:
M. Dunn;D. Howe
通讯作者: D. Howe