Direct mobilisation of lysosomal Ca2+ triggers complex Ca2+ signals.
Direct mobilisation of lysosomal Ca2+ triggers complex Ca2+ signals.
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DOI:
10.1242/jcs.118836
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发表时间:
2013-01-01
影响因子:
4
通讯作者:
Patel S
中科院分区:
文献类型:
--
作者:
Kilpatrick BS;Eden ER;Schapira AH;Futter CE;Patel S
Accumulating evidence implicates acidic organelles of the endolysosomal system as mobilisable stores of Ca2+ but their relationship to the better-characterised endoplasmic reticulum (ER) Ca2+ store remains unclear. Here we show that rapid osmotic permeabilisation of lysosomes evokes prolonged, spatiotemporally complex Ca2+ signals in primary cultured human fibroblasts. These Ca2+ signals comprised an initial response that correlated with lysosomal disruption and secondary long-lasting spatially heterogeneous Ca2+ oscillations that required ER-localised inositol trisphosphate receptors. Electron microscopy identified extensive membrane contact sites between lysosomes and the ER. Mobilisation of lysosomal Ca2+ stores is thus sufficient to evoke ER-dependent Ca2+ release probably through lysosome-ER membrane contact sites, and akin to the proposed mechanism of action of the Ca2+ mobilising messenger nicotinic acid adenine dinucleotide phosphate (NAADP). Our data identify functional and physical association of discrete Ca2+ stores important for the genesis of Ca2+ signal complexity.
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DOI:
10.1074/jbc.m110.162073
发表时间:
2010-12-03
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Brailoiu E;Rahman T;Churamani D;Prole DL;Brailoiu GC;Hooper R;Taylor CW;Patel S
通讯作者:
Patel S
影响因子:
3.9
作者:
Patel, Sandip;Brailoiu, Eugen
通讯作者:
Brailoiu, Eugen
影响因子:
4
作者:
Berridge, MJ
通讯作者:
Berridge, MJ
影响因子:
4.8
作者:
Lin-Moshier, Yaping;Walseth, Timothy F.;Marchant, Jonathan S.
通讯作者:
Marchant, Jonathan S.
影响因子:
4.8
作者:
Kinnear, NP;Boittin, FX;Evans, AM
通讯作者:
Evans, AM