Brain activity regulates loose coupling between mitochondrial and cytosolic Ca 2+ transients
Yuan Lin,Linlin Li,Wei Nie,Xiaolei Liu,Avital Adler,Chi Xiao,Fujian Lu,Liping Wang,Hua Han,Xianhua Wang,Wen-Biao Gan,Heping Cheng +11 more
TL;DR: It is shown that mitochondrial and cytosolic calcium transients are dynamically coupled as a function of brain activity, and the coupling fidelity is greatly increased during treadmill running and visual stimulation of awake behaving mice.
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Abstract: Mitochondrial calcium ([Ca2+]mito) dynamics plays vital roles in regulating fundamental cellular and organellar functions including bioenergetics. However, neuronal [Ca2+]mito dynamics in vivo and its regulation by brain activity are largely unknown. By performing two-photon Ca2+ imaging in the primary motor (M1) and visual cortexes (V1) of awake behaving mice, we find that discrete [Ca2+]mito transients occur synchronously over somatic and dendritic mitochondrial network, and couple with cytosolic calcium ([Ca2+]cyto) transients in a probabilistic, rather than deterministic manner. The amplitude, duration, and frequency of [Ca2+]cyto transients constitute important determinants of the coupling, and the coupling fidelity is greatly increased during treadmill running (in M1 neurons) and visual stimulation (in V1 neurons). Moreover, Ca2+/calmodulin kinase II is mechanistically involved in modulating the dynamic coupling process. Thus, activity-dependent dynamic [Ca2+]mito-to-[Ca2+]cyto coupling affords an important mechanism whereby [Ca2+]mito decodes brain activity for the regulation of mitochondrial bioenergetics to meet fluctuating neuronal energy demands as well as for neuronal information processing.
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References
Mitochondria and apoptosis
Douglas R. Green,John C. Reed +1 more
TL;DR: A variety of key events in apoptosis focus on mitochondria, including the release of caspase activators (such as cytochrome c), changes in electron transport, loss of mitochondrial transmembrane potential, altered cellular oxidation-reduction, and participation of pro- and antiapoptotic Bcl-2 family proteins.
9.1K
Ultrasensitive fluorescent proteins for imaging neuronal activity.
Tsai Wen Chen,Trevor J. Wardill,Trevor J. Wardill,Yi Sun,Stefan R. Pulver,Sabine L. Renninger,Amy Baohan,Amy Baohan,Eric R. Schreiter,Rex Kerr,Michael B. Orger,Vivek Jayaraman,Loren L. Looger,Karel Svoboda,Douglas S. Kim +14 more
TL;DR: A family of ultrasensitive protein calcium sensors (GCaMP6) that outperformed other sensors in cultured neurons and in zebrafish, flies and mice in vivo are developed and provide new windows into the organization and dynamics of neural circuits over multiple spatial and temporal scales.
Mitochondrial dysfunction and oxidative stress in neurodegenerative diseases
Michael T. Lin,M. Flint Beal +1 more
TL;DR: Treatments targeting basic mitochondrial processes, such as energy metabolism or free-radical generation, or specific interactions of disease-related proteins with mitochondria hold great promise in ageing-related neurodegenerative diseases.
6.2K
The green fluorescent protein
TL;DR: In just three years, the green fluorescent protein from the jellyfish Aequorea victoria has vaulted from obscurity to become one of the most widely studied and exploited proteins in biochemistry and cell biology.
Integrative genomics identifies MCU as an essential component of the mitochondrial calcium uniporter
Joshua M. Baughman,Fabiana Perocchi,Fabiana Perocchi,Hany S. Girgis,Hany S. Girgis,Molly Plovanich,Molly Plovanich,Casey A. Belcher-Timme,Casey A. Belcher-Timme,Yasemin Sancak,Yasemin Sancak,X. Robert Bao,X. Robert Bao,Laura Strittmatter,Laura Strittmatter,Olga Goldberger,Olga Goldberger,Roman L. Bogorad,Victor Koteliansky,Vamsi K. Mootha,Vamsi K. Mootha +20 more
TL;DR: Genome phylogenetic profiling, genome-wide RNA co-expression analysis and organelle-wide protein coexpression analysis are used to predict proteins functionally related to MICU1, establishing MCU as an essential component of the mitochondrial Ca2+ uniporter.