The cell boundary theorem: a simple law of the control of cytosolic calcium concentration.
The cell boundary theorem: a simple law of the control of cytosolic calcium concentration.
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DOI:
10.1007/s12576-009-0069-z
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发表时间:
2010-01
影响因子:
2.3
通讯作者:
Rios, Eduardo
中科院分区:
文献类型:
--
作者:
Rios, Eduardo
Many molecular biological interventions in current use, as well as inheritable disease conditions, modify the intracellular endowment of molecules that bind Ca2+ or channels and pumps that transfer it to and from intracellular storage organelles. A simple law, named the “cell boundary theorem,” states that intracellular alterations cannot directly result in changes in the cytosolic concentration, [Ca2+]i, in a true resting state. A demonstration of the validity of this theorem is provided. Several examples are then discussed of interventions or diseases that increase leak of Ca2+ from storage organelles and result in greater resting [Ca2+]i. According to the theorem, the increase in [Ca2+]i cannot be a direct consequence of the greater leak. Its primary cause must be a change of the fluxes at the level of the plasmalemma, caused in turn by the increase in leak through some sort of “store-operated Ca2+ entry.” While the law is discussed in terms of Ca2+ homeostasis, it applies to any solute that may be transported by the plasma membrane.
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