Topological reorganizations of mitochondria isolated from rat brain after 72 hours of paradoxical sleep deprivation, revealed by electron cryo-tomography
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作者:
Lu, Zhuoyang
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Xi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R ChinaXi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R China
Lu, Zhuoyang
[1
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Hu, Yachong
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Xi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R ChinaXi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R China
Hu, Yachong
[1
]
Wang, Yongyao
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Xi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R ChinaXi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R China
Wang, Yongyao
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Zhang, Tiantian
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Xi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R ChinaXi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R China
Zhang, Tiantian
[1
]
Long, Jiangang
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Xi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R ChinaXi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R China
Long, Jiangang
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Liu, Jiankang
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Xi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R ChinaXi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R China
Liu, Jiankang
[1
]
机构:
[1] Xi An Jiao Tong Univ, Ctr Mitochondrial Biol & Med, Sch Life Sci & Technol, Key Lab Biomed Informat Engn,Minist Educ, Xian, Peoples R China
electron cryo-tomography;
membrane structure;
mitochondria;
paradoxical sleep deprivation;
respiratory activity;
OXIDATIVE STRESS;
ATP SYNTHASE;
PROTEIN;
DYSFUNCTION;
HIPPOCAMPUS;
CRISTAE;
SITES;
D O I:
10.1152/ajpcell.00077.2021
中图分类号:
Q2 [细胞生物学];
学科分类号:
071009 ;
090102 ;
摘要:
Sleep deprivation has profound influence on several aspects of health and disease. Mitochondria dysfunction has been implicated to play an essential role in the neuronal cellular damage induced by sleep deprivation, but little is known about how neuronal mitochondrial ultrastructure is affected under sleep deprivation. In this report, we utilized electron cryo-tomography to reconstruct the three-dimensional (3-D) mitochondrial structure and extracted morphometric parameters to quantitatively characterize its reorganizations. Isolated mitochondria from the hippocampus and cerebral cortex of adult male Sprague-Dawley rats after 72 h of paradoxical sleep deprivation (PSD) were reconstructed and analyzed. Statistical analysis of six morphometric parameters specific to the mitochondrial inner membrane topology revealed identical pattern of changes in both the hippocampus and cerebral cortex but with higher significance levels in the hippocampus. The structural differences were indistinguishable by conventional phenotypic methods based on two-dimensional electron microscopy images or 3-D electron tomography reconstructions. Furthermore, to correlate structure alterations with mitochondrial functions, high-resolution respirometry was employed to investigate the effects of PSD on mitochondrial respiration, which showed that PSD significantly suppressed the mitochondrial respiratory capacity of the hippocampus, whereas the isolated mitochondria from the cerebral cortex were less affected. These results demonstrate the capability of the morphometric parameters for quantifying complex structural reorganizations and suggest a correlation between PSD and inner membrane architecture/respiratory functions of the brain mitochondria with variable effects in different brain regions.