The effect of caffeine, adenosine, and buffer ionic composition on the induction of cell-surface cAMP binding during starvation of Dictyostelium discoideum.
The effect of caffeine, adenosine, and buffer ionic composition on the induction of cell-surface cAMP binding during starvation of Dictyostelium discoideum.
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盘基网柄菌饥饿期间咖啡因、腺苷和缓冲离子组合物对诱导细胞表面 cAMP 结合的影响。
DOI:
10.1002/dvg.1020090411
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发表时间:
1988
期刊:
影响因子:
--
通讯作者:
Chisholm,RL
中科院分区:
文献类型:
--
作者:
Drummond,IA;Chisholm,RL
We have analyzed the effects of the cAMP relay inhibitor, caffeine, and the receptor antagonist, adenosine, on the regulation of the cell‐surface cAMP receptor in suspensionstarvedDictyostelium discoideumcells by measuring ammonium sulfate‐stabilized binding of [3‐H]cAMP to intact cells. When cells were starved in fast (230 r.p.m.) shaken suspension in 10 mM Na+/5 mM K+phosphate buffer, pH 6.5, plus 1 mM CaCl2and 2.5 mM MgCl2, and assayed for specific cAMP binding, receptor accumulation peaked at approximately 6 hours, reaching a maximum of 1.5 pmol cAMP bound/107cells (saturation binding). Neither caffeine nor adenosine inhibited the accumulation of cAMP receptors. Similar results were obtained in caffeine‐treated, slow shaken (90 r.p.m.) suspension cultures. These results suggest that starvation alone is sufficient stimulus to induce the cAMP receptor. We have also tested the effects of different buffer ionic compositions on the accumulation of cAMP receptors. Elevation of the monovalent ion concentration to 30‐40 mM was found to significantly inhibit the induction of cAMP receptors.
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DOI:
10.1677/joe.0.0540527
发表时间:
1972
期刊:
The Journal of endocrinology
影响因子:
--
作者:
K. Szybek
通讯作者:
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DOI:
10.1002/mrd.1120090211
发表时间:
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期刊:
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作者:
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作者:
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DOI:
10.1002/jez.1402260320
发表时间:
1983
期刊:
The Journal of experimental zoology
影响因子:
--
作者:
Leibfried,ML;Bavister,BD
通讯作者:
Bavister,BD
DOI:
10.1530/jrf.0.0550429
发表时间:
1979
期刊:
Journal of reproduction and fertility
影响因子:
--
作者:
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通讯作者:
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