Activation of the mitochondrial permeability transition pore modulates Ca2+ responses to physiological stimuli in adult neurons.
Activation of the mitochondrial permeability transition pore modulates Ca2+ responses to physiological stimuli in adult neurons.
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DOI:
10.1111/j.1460-9568.2010.07576.x
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发表时间:
2011-03
期刊:
影响因子:
--
通讯作者:
Forte M
中科院分区:
文献类型:
--
作者:
Barsukova A;Komarov A;Hajnóczky G;Bernardi P;Bourdette D;Forte M
The participation of mitochondria in cellular and neuronal Ca2+ homeostatic networks is now well accepted. Yet, critical tests of specific mitochondrial pathways in neuronal Ca2+ responses have been hampered because the identity of mitochondrial proteins that must be integrated within this dynamic system remain uncertain. One putative pathway for Ca2+ efflux from mitochondria exists through the formation of the permeability transition pore (PTP) that is often associated with cellular and neuronal death. Here, we have evaluated neuronal Ca2+ dynamics and the PTP in single adult neurons in wild-type mice and those missing cyclophilin D (CyPD), a key regulator of the PTP. Using high-resolution time-lapse imaging, we demonstrate that PTP opening only follows simultaneous activation with two physiological stimuli that generate critical threshold levels of cytosolic and mitochondrial Ca2+. Our results are the first to demonstrate CyPD-dependent PTP opening in normal neuronal Ca2+ homeostatic mechanisms not leading to activation of cell death pathways. As neurons in mice lacking CyPD are protected in a number of neurodegenerative disease models, the results suggest that improved viability of CyPD-knockout animals in these pathological states may be due to the transient, rather than persistent, activation of the PTP in mutant mitochondria, thereby shielding neurons from cytoplasmic Ca2+ overload.
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影响因子:
4.3
作者:
Csordas, Gyoergy;Hajnoczky, Gyoergy
通讯作者:
Hajnoczky, Gyoergy
影响因子:
4
作者:
Gyorgy Hajnoczky;Gyrogy Csordas;Yi, Muqing
通讯作者:
Yi, Muqing
DOI:
10.1002/neu.480230915
发表时间:
1992-11-01
期刊:
JOURNAL OF NEUROBIOLOGY
影响因子:
--
作者:
CHOI, DW
通讯作者:
CHOI, DW
影响因子:
3.5
作者:
ICHAS, F;JOUAVILLE, LS;HOLMUHAMEDOV, EL
通讯作者:
HOLMUHAMEDOV, EL
影响因子:
3
作者:
Bernardi, P;Petronilli, V
通讯作者:
Petronilli, V