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.
复制标题

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
复制
发表时间:
1988
期刊:
Developmental genetics
影响因子:
--
通讯作者:
Chisholm,RL
Chisholm,RL
中科院分区:
--
文献类型:
--
作者:
Drummond,IA;Chisholm,RL

文献摘要

参考文献

被引文献

相似文献

我们通过测量硫酸铵稳定的[3-H]cAMP与完整细胞的结合,分析了cAMP中继抑制剂咖啡因和受体拮抗剂腺苷对悬浮饥饿的Dictyosteoblastdiscoideum细胞中细胞表面cAMP受体调节的影响。当细胞在快速(230 r. p.m.)在10 mM Na+/5 mM K+磷酸盐缓冲液(pH 6.5)中振摇悬浮液,加1 mM CaCl 2和2.5 mM MgCl 2,并测定特异性cAMP结合,受体积累在约6小时达到峰值,达到最大值1.5 pmol cAMP结合/107个细胞(饱和结合)。咖啡因和腺苷都不能抑制cAMP受体的积累。在咖啡因处理的、缓慢摇动(90 r. p.m.)悬浮培养这些结果表明,饥饿单独是足够的刺激,以诱导cAMP受体。我们还测试了不同缓冲液离子组成对cAMP受体积累的影响。发现单价离子浓度升高至30 - 40 mM可显著抑制cAMP受体的诱导。
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.
性成熟小鼠卵母细胞的体外成熟。
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: K. Szybek
DOI: 10.1002/mrd.1120090211
发表时间: 1984
期刊: Gamete Research
影响因子: --
作者:
R. B. Staigmiller;R. Moor
通讯作者: R. Moor
DOI: 10.1002/jez.1402290217
发表时间: 1984-01-01
影响因子: --
作者:
HERLANDS, RL;SCHULTZ, RM
通讯作者: SCHULTZ, RM
金仓鼠体外成熟卵母细胞的受精能力。
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
LH对体外成熟大鼠卵母细胞受精能力和发育能力的影响。
DOI: 10.1530/jrf.0.0550429
发表时间: 1979
期刊: Journal of reproduction and fertility
影响因子: --
作者:
R. Shalgi;N. Dekel;P. Kraicer
通讯作者: P. Kraicer