Cyclic ADP‐ribose and inositol 1,4,5‐trisphosphate mobilizes Ca2+ from distinct intracellular pools in permeabilized lacrimal acinar cells

Cyclic ADP‐ribose and inositol 1,4,5‐trisphosphate mobilizes Ca2+ from distinct intracellular pools in permeabilized lacrimal acinar cells
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环状 ADP-核糖和肌醇 1,4,5-三磷酸从透化的泪腺腺泡细胞的不同细胞内池中调动 Ca2+

DOI:
10.1016/0014-5793(95)00131-r
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发表时间:
1995
期刊:
影响因子:
3.5
通讯作者:
S. Dissing
S. Dissing
中科院分区:
生物学3区
文献类型:
--
作者:
J. Gromada;T. D. Jørgensen;S. Dissing

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在透性化的泪腺泡细胞中,环ADP-核糖(cADP-核糖)和1,4,5-三磷酸肌醇(Ins(1,4,5)P3)以剂量依赖性方式从不同的毒胡萝卜素敏感的Ca 2+池中释放Ca 2+。Ryanodine特异性地阻断cADP-核糖引起的Ca ~(2+)反应,而肝素则强烈地降低Ins(1,4,5)P_3引起的Ca ~(2+)反应。GTP通过对ryanodine和肝素不敏感的机制引起Ca ~(2+)的快速释放,并增强Ins(1,4,5)P3而不是cADP-核糖引起的Ca ~(2+)释放。cADP-核糖可释放16 μ molCa ~(2+)/I细胞,而Ins(1,4,5)P_3可动员55 μ molCa ~(2+)/I细胞。结果表明,cADP-核糖和Ins(1,4,5)P3从不同的内部钙库释放Ca 2+,并且存在第三个Ca 2+库,它可以通过GTP介导的过程选择性地与Ins(1,4,5)P3敏感的Ca 2+库相互作用。
In permeabilized lacrimal acinar cells, cyclic ADP-ribose (cADP-ribose) and inositol 1,4,5-trisphosphate (Ins(1,4,5)P3) release Ca2+in a dose dependent manner from distinct thapsigargin-sensitive Ca2+pools. Ryanodine specifically blocks the Ca2+response to cADP-ribose, whereas heparin strongly reduces the response to Ins(1,4,5)P3application. GTP causes a rapid Ca2+release by a ryanodine- and heparin-insensitive mechanism and potentiates Ins(1,4,5)P3but not cADP-ribose evoked Ca2+release. It is estimated that cADP-ribose can release 16 μmol Ca2+/I cells, whereas Ins(1,4,5)P3can mobilize 55 μmol Ca2+/I cells. The results suggest that cADP-ribose and Ins(1,4,5)P3release Ca2+from distinct internal stores and that a third Ca2+pool exists which can selectively interact with the Ins(1,4,5)P3-sensitive Ca2+store by a GTP-mediated process.
DOI: 10.1126/science.1465619
发表时间: 1992-12-11
期刊: SCIENCE
影响因子: 56.9
作者:
ALLBRITTON, NL;MEYER, T;STRYER, L
通讯作者: STRYER, L
肝素对肌醇 1,4,5-三磷酸激活的钙释放具有竞争性、可逆性和强效拮抗作用。
DOI: --
发表时间: 1988
期刊: The Journal of biological chemistry
影响因子: --
作者:
Ghosh,TK;Eis,PS;Mullaney,JM;Ebert,CL;Gill,DL
通讯作者: Gill,DL