Effects of ATP-sensitive potassium channel opener on potassium transport and alveolar fluid clearance in the resected human lung.

Effects of ATP-sensitive potassium channel opener on potassium transport and alveolar fluid clearance in the resected human lung.
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ATP 敏感钾通道开放剂对切除人肺中钾转运和肺泡液清除的影响。

DOI:
10.1111/j.1600-0773.1998.tb01436.x
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发表时间:
1998
期刊:
Pharmacology & toxicology
影响因子:
--
通讯作者:
M. Matthay
M. Matthay
中科院分区:
--
文献类型:
--
作者:
Tsutomu Sakuma;Keiji Takahashi;Nobuo Ohya;Tasuku Nakada;M. Matthay

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由于ATP敏感性钾通道(KATP通道)开放剂对肺泡上皮细胞功能的影响是未知的,因此在切除的人肺中测定了新合成的KATP通道开放剂YM 934对钾流入肺泡空间和肺泡液体清除的影响。将具有低钾浓度的等渗白蛋白溶液滴入切除的人肺的远端气隙中。通过肺泡蛋白浓度的逐渐增加来测量肺泡液体清除率。通过钾浓度和肺泡液量的变化来测量净钾转运。在钾浓度为0.3 mEq/l的实验中,YM 934(10(-4)M)使钾净流入肺泡腔增加140%,并使肺泡液清除率增加60%。KATP通道阻滞剂格列本脲(10(-4)M)可抑制YM 934增加的钾转运内流和肺泡液体清除率增加。阿米洛利(10(-5)M),一种顶端钠摄取的抑制剂,也阻断了YM 934刺激的肺泡液体净清除率的增加。这些结果表明,KATP通道开放剂可以影响钾转运和净矢量流体运动通过人肺泡上皮。
Since the effect of an ATP-sensitive potassium channel (KATP channel) opener on the function of alveolar epithelial cells is unknown, the effect of YM934, a newly synthesized KATP channel opener, on potassium influx into the alveolar spaces and alveolar fluid clearance was determined in the resected human lung. An isosmolar albumin solution with a low potassium concentration was instilled into the distal airspaces of resected human lungs. Alveolar fluid clearance was measured by the progressive increase in alveolar protein concentration. Net potassium transport was measured by the change in potassium concentration and alveolar fluid volume. YM934 (10(-4) M) increased net influx of potassium by 140% into the alveolar spaces and also increased alveolar fluid clearance by 60% in the experiments with a potassium concentration of 0.3 mEq/1. Glibenclamide (10(-4) M), a KATP channel blocker, inhibited the YM934-increased influx of potassium transport and the increase in alveolar fluid clearance. Also amiloride (10(-5) M), an inhibitors of apical sodium uptake, blocked the YM934 stimulated increase in net alveolar fluid clearance. These results indicate that a KATP channel opener can effect potassium transport and net vectorial fluid movement across the human alveolar epithelium.
大鼠失血性休克液体复苏后肺泡液体清除率的上调。
DOI: 10.1152/ajplung.1997.273.2.l305
发表时间: 1997
期刊: The American journal of physiology.
影响因子: --
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发表时间: 1993
期刊: Journal of applied physiology (Bethesda, Md. : 1985)
影响因子: --
作者:
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发表时间: 1991
期刊: Journal of applied physiology (Bethesda, Md. : 1985)
影响因子: --
作者:
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发表时间: 1994-05-24
影响因子: 11.1
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发表时间: 1994
期刊: Chest
影响因子: 9.6
作者:
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