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1
Demonstration of a pump-mediated efflux in the epithelial potassium active transport system of insect midgut.昆虫中肠上皮钾离子主动转运系统中泵介导外排的证明。
Biophys J. 1978 Aug;23(2):313-8. doi: 10.1016/S0006-3495(78)85450-2.
2
Active transport of potassium by insect midgut.昆虫中肠对钾的主动转运。
Fed Proc. 1981 Jul;40(9):2412-6.
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Active transport by the cecropia midgut. II. Fine structure of the midgut epithelium.天蚕中肠的主动运输。二、中肠上皮的精细结构。
J Cell Biol. 1966 Oct;31(1):107-34. doi: 10.1083/jcb.31.1.107.
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Voltage-current relation and K+ transport in tobacco hornworm (Manduca sexta) midgut.烟草天蛾（烟草天蛾）中肠的电压-电流关系与钾离子转运
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Chemiosmotic potassium ion pump of insect epithelia.昆虫上皮细胞的化学渗透钾离子泵
Am J Physiol. 1983 Feb;244(2):R163-75. doi: 10.1152/ajpregu.1983.244.2.R163.
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Refinements in the short-circuit technique and its application to active potassium transport across the cecropia midgut.短路技术的改进及其在天蚕中肠钾离子主动转运中的应用。
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本文引用的文献

1
Active transport by the cecropia midgut. II. Fine structure of the midgut epithelium.天蚕中肠的主动运输。二、中肠上皮的精细结构。
J Cell Biol. 1966 Oct;31(1):107-34. doi: 10.1083/jcb.31.1.107.
2
Cation distributions across the larval and pupal midgut of the lepidopteran, Hyalophora cecropia, in vivo.鳞翅目昆虫天蚕蛾幼虫和蛹中肠阳离子的体内分布情况。
J Exp Biol. 1975 Oct;63(2):321-30. doi: 10.1242/jeb.63.2.321.

昆虫中肠上皮钾离子主动转运系统中泵介导外排的证明。

Demonstration of a pump-mediated efflux in the epithelial potassium active transport system of insect midgut.

作者信息

Blankemeyer J T

出版信息

Biophys J. 1978 Aug;23(2):313-8. doi: 10.1016/S0006-3495(78)85450-2.

DOI:10.1016/S0006-3495(78)85450-2
PMID:567504
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1473522/
Abstract

The larval midgut epithelium of lepidopteran insects (e.g., Hyalophora cecropia and Manduca sexta) actively transports potassium from hemolymph to lumen when mounted in a chamber. The potassium active transport is rheogenic and does not require the presence of other alkali ions. The transepithelial potential difference, short-circuit current, and electromotive force of active transport are rapidly diminished by anoxia. The efflux of potassium, opposite in direction to potassium active transport, dramatically increased in anoxia, whereas the effluxes of sodium, cesium, and chloride did not increase in anoxia. The increase in efflux was found to have an alkali selectivity similar to that of potassium active transport. It is concluded that the rise of efflux in anoxia is due to the change characteristics of the epithelial potassium active transport mechanism in anoxia.

摘要

鳞翅目昆虫（如天蚕蛾和烟草天蛾）的幼虫中肠上皮细胞在置于小室中时会主动将钾离子从血淋巴转运至肠腔。钾离子的主动转运是生电的，且不需要其他碱金属离子的存在。主动转运的跨上皮电位差、短路电流和电动势会因缺氧而迅速降低。与钾离子主动转运方向相反的钾离子外流在缺氧时显著增加，而钠离子、铯离子和氯离子的外流在缺氧时并未增加。发现这种外流的增加具有与钾离子主动转运相似的碱选择性。得出的结论是，缺氧时外流的增加是由于缺氧时上皮钾离子主动转运机制的变化特性所致。