INSP(3)-INDUCED CA2+ EXCITABILITY OF THE ENDOPLASMIC-RETICULUM

INSP(3)-INDUCED CA2+ EXCITABILITY OF THE ENDOPLASMIC-RETICULUM
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DOI:
10.1091/mbc.6.8.945
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发表时间:
1995-08-01
影响因子:
3.3
通讯作者:
RINZEL, J
RINZEL, J
中科院分区:
生物学3区
文献类型:
--
作者:
KEIZER, J;LI, YX;RINZEL, J

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细胞内 Ca2+ 的振荡可以由多种细胞信号传导过程诱导(Woods 等,1986;Berridge 1988;Jacob 等,1988),并且似乎在分泌(Stojilkovic 等,1994)、受精(Miyazaki 等,1993)和平滑肌收缩(Iino 和 Tsukioka, 1994)。最近,在了解与第二信使肌醇 1,4,5-三磷酸 (InsP(3)) 相关的特定类别 Ca2+ 振荡所涉及的机制方面取得了巨大进展 (Berridge, 1993)。 InsP(3) 与细胞内 Ca2+ 协同工作,通过内质网 (ER) 中的 InsP(3) 受体控制 Ca2+ 释放(Berridge 和 Irvine,1989)。 IP3 受体受其共激动剂 InsP 和 Ca2+ 调节,它们既激活又抑制 Ca2+ 释放(Finch 等,1991;Bezprozvanny 等,1991;De Young 和 Keizer,1992)。这些过程与内质网摄取 Ca2+ 的周期性激活一起,已被确定为垂体促性腺激素 (Li et al., 1994)、非洲爪蟾卵母细胞 (Lechleiter and Clapham, 1992; Atri et al., 1993) 和其他细胞类型 (Keizer and De Young, 1993) 中 InsP(3) 诱导的 Ca2+ 振荡机制的关键特征。 1993)。 InsP(3) 引起的 Ca2+ 振荡的早期讨论和模型主要集中在内部可释放 Ca2+ 池的性质和数量(Goldbeter 等,1990;Swillens 和 Mercan,1990;Somogyi 和 Stucki,1991)、InsP(3) 中振荡的重要性(Meyer 和 Stryer,1988)以及其他不基于详细实验结果的问题。特定的细胞类型。在这篇综述中,我们简要总结了最近有关 InsP(3) 诱导的 ER Ca2+ 兴奋性的实验结果,并描述了一个详细的定量模型来解释细胞内 Ca2+ 振荡如何发生(De Young 和 Keizer,1992;Li 等人,1995b)。
Oscillations in intracellular Ca2+ can be induced by a variety of cellular signalling processes (Woods et al., 1986; Berridge 1988; Jacob et al., 1988) and appear to play a role in secretion (Stojilkovic et al., 1994), fertilization (Miyazaki et al., 1993), and smooth muscle contraction (Iino and Tsukioka, 1994). Recently, great progress has been made in understanding the mechanisms involved in a particular class of Ca2+ oscillation, associated with the second messenger inositol 1,4,5-trisphosphate (InsP(3)) (Berridge, 1993). Working in concert with intracellular Ca2+, InsP(3) controls Ca2+ release via the InsP(3) receptor in the endoplasmic reticulum (ER) (Berridge and Irvine, 1989). The IP3 receptor is regulated by its coagonists InsP, and Ca2+, which both activate and inhibit Ca2+ release (Finch et al., 1991; Bezprozvanny et al., 1991; De Young and Keizer, 1992). These processes, together with the periodic activation of Ca2+ uptake into the ER, have been identified as key features in the mechanism of InsP(3)-induced Ca2+ oscillations in pituitary gonadotrophs (Li et al., 1994), Xenopus laevis oocytes (Lechleiter and Clapham, 1992; Atri et al., 1993), and other cell types (Keizer and De Young, 1993). Earlier discussions and models of InsP(3)-induced Ca2+ oscillations focused on the nature and number of internal releasable pools of Ca2+ (Goldbeter et al., 1990; Swillens and Mercan, 1990; Somogyi and Stucki, 1991), the importance of oscillations in InsP(3) (Meyer and Stryer, 1988), and other issues not based on detailed experimental findings in specific cells types. In this review we briefly summarize recent experimental findings dealing with InsP(3)-induced Ca2+ excitability of the ER and describe a detailed, quantitative model that explains how intracellular Ca2+ oscillations occur (De Young and Keizer, 1992; Li et al., 1995b).