3D neuronal mitochondrial morphology in axons, dendrites, and somata of the aging mouse hippocampus.
3D neuronal mitochondrial morphology in axons, dendrites, and somata of the aging mouse hippocampus.
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DOI:
10.1016/j.celrep.2021.109509
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发表时间:
2021-08-10
期刊:
影响因子:
8.8
通讯作者:
Picard M
中科院分区:
文献类型:
--
作者:
Faitg J;Lacefield C;Davey T;White K;Laws R;Kosmidis S;Reeve AK;Kandel ER;Vincent AE;Picard M
The brain’s ability to process complex information relies on the constant supply of energy through aerobic respiration by mitochondria. Neurons contain three anatomically distinct compartments—the soma, dendrites, and projecting axons—which have different energetic and biochemical requirements, as well as different mitochondrial morphologies in cultured systems. In this study, we apply quantitative three-dimensional electron microscopy to map mitochondrial network morphology and complexity in the mouse brain. We examine somatic, dendritic, and axonal mitochondria in the dentate gyrus and cornu ammonis 1 (CA1) of the mouse hippocampus, two subregions with distinct principal cell types and functions. We also establish compartment-specific differences in mitochondrial morphology across these cell types between young and old mice, highlighting differences in age-related morphological recalibrations. Overall, these data define the nature of the neuronal mitochondrial network in the mouse hippocampus, providing a foundation to examine the role of mitochondrial morpho-function in the aging brain. Faitg et al. use 3D electron microscopy to quantitatively define mitochondrial morphology in the mouse hippocampus with age. Their analysis shows that axonal, dendritic, and somatic mitochondrial morphologies differ between hippocampal CA1 and DG regions and that age is associated with compartment-specific recalibrations in mitochondrial morphology.
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