Stimulation of calcium efflux from the hagfish, Eptatretus cirrhatus, gill pouch by an extract of corpuscles of Stannius from an eel (Anguilla dieffenbachii): teleostei.
Stimulation of calcium efflux from the hagfish, Eptatretus cirrhatus, gill pouch by an extract of corpuscles of Stannius from an eel (Anguilla dieffenbachii): teleostei.
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通过鳗鱼 (Anguilla dieffenbachii) 的 Stannius 小体提取物刺激盲鳗、Eptatretus cirathus、鳃袋中的钙流出：硬骨鱼。
DOI：
10.1006/gcen.1994.1063
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发表时间：
1994
影响因子：
2.7
通讯作者：
J. Fenwick
中科院分区：
文献类型：
--
作者：
M. Forster;J. Fenwick
一种存在于硬骨鱼Stannius小体匀浆中的因子，在长鳍鳗(Anguilla Dieffenbchii)中显示出对角叉鳗(Eptalretus Cirrhatus)的促钙素作用。该因子显著增加了分离的灌流鳃袋制剂的钙外流，但对钙内流无影响。鳗鱼调节血浆总钙的浓度约为周围海水的50%。完整的鳗鱼的钙内流和外流速率与硬骨鱼记录的相似。因此，八目鳗与硬骨鱼相似，因为它们能够并确实保持血浆钙浓度，这与环境介质中的浓度有很大不同。它们与硬骨鱼的相似之处还在于，横跨七鳃鱼鳃囊的跨上皮钙流对斯坦尼乌斯小体的提取物做出反应。然而，八目鳗与硬骨鱼非常不同，因为斯坦尼乌斯小体提取物刺激钙外流，而不是抑制钙内流。
A factor present in the homogenate of the corpuscles of Stannius from a teleost, the longfin eel Anguilla dieffenbachii, showed calcitropic effects in an agnathan, the hagfish Eptatretus cirrhatus. This factor greatly increased calcium efflux from an isolated perfused gill pouch preparation and had no effect on calcium influx. Hagfish regulated plasma total calcium at a concentration which was about 50% of that of the ambient seawater. Intact hagfish had rates of calcium influx and efflux which were similar to those recorded in teleosts. Hagfish are thus similar to teleosts to the extent that they can and do maintain a plasma calcium concentration which is quite different from that of the ambient medium. They also resemble teleosts in that transepithelial calcium fluxes across the hagfish gill pouches respond to extracts of Stannius corpuscles. Hagfish, however, are quite unlike teleosts in that the Stannius corpuscle extract stimulates calcium efflux rather than inhibiting calcium influx.