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Zheng Q, Liu H, Gao Y, Cao G, Wang Y, Li Z. Ameliorating Mitochondrial Dysfunction for the Therapy of Parkinson's Disease. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2311571. [PMID: 38385823 DOI: 10.1002/smll.202311571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/27/2024] [Indexed: 02/23/2024]
Abstract
Parkinson's disease (PD) is currently the second most incurable central neurodegenerative disease resulting from various pathogenesis. As the "energy factory" of cells, mitochondria play an extremely important role in supporting neuronal signal transmission and other physiological activities. Mitochondrial dysfunction can cause and accelerate the occurrence and progression of PD. How to effectively prevent and suppress mitochondrial disorders is a key strategy for the treatment of PD from the root. Therefore, the emerging mitochondria-targeted therapy has attracted considerable interest. Herein, the relationship between mitochondrial dysfunction and PD, the causes and results of mitochondrial dysfunction, and major strategies for ameliorating mitochondrial dysfunction to treat PD are systematically reviewed. The study also prospects the main challenges for the treatment of PD.
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Affiliation(s)
- Qing Zheng
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Suzhou Medical College, Soochow University, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China
| | - Hanghang Liu
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Suzhou Medical College, Soochow University, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China
- Hubei Key Laboratory of Natural Products Research and Development and College of Biological and Pharmaceutical Science, China Three Gorges University, Yichang, 443002, China
| | - Yifan Gao
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Suzhou Medical College, Soochow University, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China
| | - Guozhi Cao
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Suzhou Medical College, Soochow University, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China
| | - Yusong Wang
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Suzhou Medical College, Soochow University, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China
| | - Zhen Li
- Center for Molecular Imaging and Nuclear Medicine, State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Suzhou Medical College, Soochow University, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China
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2
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Raz D, Ben-Yaakov K, Levi M, Bertolin M, Ferrari S, Ponzin D, Busin M, Leiba H, Marcovich AL, Eisenberg-Lerner A, Rotfogel Z. Mitochondria Transplantation Promotes Corneal Epithelial Wound Healing. Invest Ophthalmol Vis Sci 2024; 65:14. [PMID: 38848077 PMCID: PMC11166225 DOI: 10.1167/iovs.65.6.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 05/10/2024] [Indexed: 06/13/2024] Open
Abstract
Purpose The integrity of the corneal epithelium is essential in maintaining normal corneal function. Conditions disrupting the corneal epithelial layer range from chemical burns to dry eye disease and may result in impairment of both corneal transparency and sensation. Identifying factors that regulate corneal wound healing is key for the development of new treatment strategies. Here, we investigated a direct role of mitochondria in corneal wound healing via mitochondria transplantation. Methods Human corneal epithelial cells (hCECs) were isolated from human corneas and incubated with mitochondria which were isolated from human ARPE-19 cells. We determined the effect of mitochondria transplantation on wound healing and proliferation of hCECs. In vivo, we used a mouse model of corneal chemical injury. Mitochondria were isolated from mouse livers and topically applied to the ocular surface following injury. We evaluated the time of wound repair, corneal re-epithelization, and stromal abnormalities. Results Mitochondria transplantation induced the proliferation and wound healing of primary hCECs. Further, mitochondria transplantation promoted wound healing in vivo. Specifically, mice receiving mitochondria recovered twice as fast as control mice following corneal injury, presenting both enhanced and improved repair. Corneas treated with mitochondria demonstrated the re-epithelization of the wound area to a multi-layer appearance, compared to thinning and complete loss of the epithelium in control mice. Mitochondria transplantation also prevented the thickening and disorganization of the corneal stromal lamella, restoring normal corneal dehydration. Conclusions Mitochondria promote corneal re-epithelization and wound healing. Augmentation of mitochondria levels via mitochondria transplantation may serve as an effective treatment for inducing the rapid repair of corneal epithelial defects.
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Affiliation(s)
- Daniel Raz
- Ophthalmology Research Laboratory, Department of Ophthalmology, Kaplan Medical Center, Israel
- Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Keren Ben-Yaakov
- Ophthalmology Research Laboratory, Department of Ophthalmology, Kaplan Medical Center, Israel
| | - Michal Levi
- Ophthalmology Research Laboratory, Department of Ophthalmology, Kaplan Medical Center, Israel
- Department of Ophthalmology, Kaplan Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Israel
| | | | | | - Diego Ponzin
- Fondazione Banca degli Occhi del Veneto, Venice, Italy
| | - Massimo Busin
- Department of Translational Medicine, University of Ferrara, Ferrara, Italy
- Department of Ophthalmology, Ospedali Privati Forlì “Villa Igea,” Forlì, Italy
- Istituto Internazionale per la Ricerca e Formazione in Oftalmologia, Forlì, Italy
| | - Hana Leiba
- Ophthalmology Research Laboratory, Department of Ophthalmology, Kaplan Medical Center, Israel
- Department of Ophthalmology, Kaplan Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Israel
| | - Arie L. Marcovich
- Ophthalmology Research Laboratory, Department of Ophthalmology, Kaplan Medical Center, Israel
- Department of Ophthalmology, Kaplan Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Israel
| | - Avital Eisenberg-Lerner
- Ophthalmology Research Laboratory, Department of Ophthalmology, Kaplan Medical Center, Israel
| | - Ziv Rotfogel
- Ophthalmology Research Laboratory, Department of Ophthalmology, Kaplan Medical Center, Israel
- Department of Ophthalmology, Kaplan Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Israel
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Guo H, Chen LQ, Zou ZR, Cheng S, Hu Y, Mao L, Tian H, Mei XF. Zinc remodels mitochondrial network through SIRT3/Mfn2-dependent mitochondrial transfer in ameliorating spinal cord injury. Eur J Pharmacol 2024; 968:176368. [PMID: 38316246 DOI: 10.1016/j.ejphar.2024.176368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/08/2024] [Accepted: 01/29/2024] [Indexed: 02/07/2024]
Abstract
Spinal cord injury (SCI) is a traumatic neuropathic condition that results in motor, sensory and autonomic dysfunction. Mitochondrial dysfunction caused by primary trauma is one of the critical pathogenic mechanisms. Moderate levels of zinc have antioxidant effects, promote neurogenesis and immune responses. Zinc normalises mitochondrial morphology in neurons after SCI. However, how zinc protects mitochondria within neurons is unknown. In the study, we used transwell culture, Western blot, Quantitative Real-time Polymerase Chain Reaction (QRT-PCR), ATP content detection, reactive oxygen species (ROS) activity assay, flow cytometry and immunostaining to investigate the relationship between zinc-treated microglia and injured neurons through animal and cell experiments. We found that zinc promotes mitochondrial transfer from microglia to neurons after SCI through Sirtuin 3 (SIRT3) regulation of Mitofusin 2 protein (Mfn2). It can rescue mitochondria in damaged neurons and inhibit oxidative stress, increase ATP levels and promote neuronal survival. Therefore, it can improve the recovery of motor function in SCI mice. In conclusion, our work reveals a potential mechanism to describe the communication between microglia and neurons after SCI, which may provide a new idea for future therapeutic approaches to SCI.
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Affiliation(s)
- Hui Guo
- School of Basic Medicine, Jinzhou Medical University, Jinzhou, Liaoning, China; Liaoning Provincial Collaborative Innovation Center of Medical Testing and Drug Research, Jinzhou Medical University, Jinzhou, Liaoning, China.
| | - Li-Qing Chen
- Department of Endocrinology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China.
| | - Zhi-Ru Zou
- Pharmacy School, Jinzhou Medical University, Jinzhou, Liaoning, China.
| | - Shuai Cheng
- School of Basic Medicine, Jinzhou Medical University, Jinzhou, Liaoning, China; Liaoning Provincial Collaborative Innovation Center of Medical Testing and Drug Research, Jinzhou Medical University, Jinzhou, Liaoning, China.
| | - Yu Hu
- School of Basic Medicine, Jinzhou Medical University, Jinzhou, Liaoning, China.
| | - Liang Mao
- Department of Oncology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China.
| | - He Tian
- School of Basic Medicine, Jinzhou Medical University, Jinzhou, Liaoning, China; Liaoning Provincial Collaborative Innovation Center of Medical Testing and Drug Research, Jinzhou Medical University, Jinzhou, Liaoning, China.
| | - Xi-Fan Mei
- Liaoning Provincial Collaborative Innovation Center of Medical Testing and Drug Research, Jinzhou Medical University, Jinzhou, Liaoning, China.
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4
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Dong H, Wen X, Zhang BW, Wu Z, Zou W. Astrocytes in intracerebral hemorrhage: impact and therapeutic objectives. Front Mol Neurosci 2024; 17:1327472. [PMID: 38419793 PMCID: PMC10899346 DOI: 10.3389/fnmol.2024.1327472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 01/25/2024] [Indexed: 03/02/2024] Open
Abstract
Intracerebral hemorrhage (ICH) manifests precipitously and profoundly impairs the neurological function in patients who are affected. The etiology of subsequent injury post-ICH is multifaceted, characterized by the intricate interplay of various factors, rendering therapeutic interventions challenging. Astrocytes, a distinct class of glial cells, interact with neurons and microglia, and are implicated in a series of pathophysiological alterations following ICH. A comprehensive examination of the functions and mechanisms associated with astrocytic proteins may shed light on the role of astrocytes in ICH pathology and proffer innovative therapeutic avenues for ICH management.
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Affiliation(s)
- Hao Dong
- The First Clinical Medical College, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Xin Wen
- The First Clinical Medical College, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Bai-Wen Zhang
- The First Clinical Medical College, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Zhe Wu
- The First Clinical Medical College, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Wei Zou
- The Third Department of Acupuncture and Moxibustion, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin, China
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5
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Zhang BW, Sun KH, Liu T, Zou W. The Crosstalk Between Immune Cells After Intracerebral Hemorrhage. Neuroscience 2024; 537:93-104. [PMID: 38056621 DOI: 10.1016/j.neuroscience.2023.11.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 10/28/2023] [Accepted: 11/15/2023] [Indexed: 12/08/2023]
Abstract
The inflammatory mechanism of intracerebral hemorrhage (ICH) has been widely studied, and it is believed that the regulation of this mechanism is of great significance to the prognosis. In the early stage of the acute phase of ICH, the release of a large number of inflammatory factors around the hematoma can recruit more inflammatory cells to infiltrate the area, further release inflammatory factors, cause an inflammatory cascade reaction, aggravate the volume of cerebral hematoma and edema and further destroy the blood-brain barrier (BBB), according to this, the crosstalk between cells may be of great significance in secondary brain injury (SBI). Because most of the cells recruited are inflammatory immune cells, this paper mainly discusses the cells based on the inflammatory mechanism to discuss their functions after ICH, we found that among the main cells inherent in the brain, glial cells account for the majority, of which microglia are the most widely studied and it can interact with a variety of cells, which is reflected in the literature researches on its pathogenesis and treatment. We believe that exploring multi-mechanism and multi-cell regulated drugs may be the future development trend, and the existing research, the comparison and unification of modeling methods, and the observation of long-term efficacy may be the first problem that researchers need to solve.
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Affiliation(s)
- Bai-Wen Zhang
- The First Clinical Medical College, Heilongjiang University of Chinese Medicine, Harbin 150040, China
| | - Ke-Han Sun
- Rehabilitation Department, Maternal and Child Health Hospital of Xing-an League, Ulanhot City, Inner Mongolia 137400, China
| | - Ting Liu
- Rehabilitation Department, Pengzhou Traditional Chinese Medicine Hospital, Chengdu 611930, China
| | - Wei Zou
- The Third Acupuncture Department, The First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin 150040, China.
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Wu DP, Wei YS, Du YX, Liu LL, Yan QQ, Zhao YD, Yu C, Liu JY, Zhong ZG, Huang JL. Ameliorative Role of Mitochondrial Therapy in Cognitive Function of Vascular Dementia Mice. J Alzheimers Dis 2024; 97:1381-1392. [PMID: 38250768 DOI: 10.3233/jad-230293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
BACKGROUND Mitochondrial dysfunction plays a vital role in the progression of vascular dementia (VaD). We hypothesized that transfer of exogenous mitochondria might be a beneficial strategy for VaD treatment. OBJECTIVE The study was aimed to investigate the role of mitochondrial therapy in cognitive function of VaD. METHODS The activity and integrity of isolated mitochondria were detected using MitoTracker and Janus Green B staining assays. After VaD mice were intravenously injected with exogenous mitochondria, Morris water maze and passive avoidance tests were used to detect cognitive function of VaD mice. Haematoxylin and eosin, Nissl, TUNEL, and Golgi staining assays were utilized to measure neuronal and synaptic injury in the hippocampus of VaD mice. Detection kits were performed to detect mitochondrial membrane potential (ΔΨ), SOD activity and the levels of ATP, ROS, and MDA in the brains of VaD mice. RESULTS The results showed that isolated mitochondria were intact and active. Mitochondrial therapy could ameliorate cognitive performance of VaD mice. Additionally, mitochondrial administration could attenuate hippocampal neuronal and synaptic injury, improve mitochondrial ΔΨ, ATP level and SOD activity, and reduce ROS and MDA levels in the brains of VaD mice. CONCLUSIONS The study reports profitable effect of mitochondrial therapy against cognitive impairment of VaD, making mitochondrial treatment become a promising therapeutic strategy for VaD.
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Affiliation(s)
- Deng-Pan Wu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Pharmacy School, Xuzhou Medical University, Xuzhou, Jiangsu, China
- Xuzhou Ruihu Health Management Consulting Co., Ltd, Xuzhou, Jiangsu, China
| | - Yan-Su Wei
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Pharmacy School, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Yu-Xuan Du
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Pharmacy School, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Ling-Ling Liu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Pharmacy School, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Qiu-Qing Yan
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Pharmacy School, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Yuan-Dan Zhao
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Pharmacy School, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Chao Yu
- School of Basic Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Jin-Yuan Liu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Pharmacy School, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Zhen-Guo Zhong
- Scientific Research Center of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi, China
| | - Jin-Lan Huang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Pharmacy School, Xuzhou Medical University, Xuzhou, Jiangsu, China
- Xuzhou Ruihu Health Management Consulting Co., Ltd, Xuzhou, Jiangsu, China
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Karachaliou CE, Livaniou E. Neuroprotective Action of Humanin and Humanin Analogues: Research Findings and Perspectives. BIOLOGY 2023; 12:1534. [PMID: 38132360 PMCID: PMC10740898 DOI: 10.3390/biology12121534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 12/08/2023] [Accepted: 12/14/2023] [Indexed: 12/23/2023]
Abstract
Humanin is a 24-mer peptide first reported in the early 2000s as a new neuroprotective/cytoprotective factor rescuing neuronal cells from death induced by various Alzheimer's disease-associated insults. Nowadays it is known that humanin belongs to the novel class of the so-called mitochondrial-derived peptides (which are encoded by mitochondrial DNA) and has been shown to exert beneficial cytoprotective effects in a series of in vitro and/or in vivo experimental models of human diseases, including not only neurodegenerative disorders but other human diseases as well (e.g., age-related macular degeneration, cardiovascular diseases, or diabetes mellitus). This review article is focused on the presentation of recent in vitro and in vivo research results associated with the neuroprotective action of humanin as well as of various, mainly synthetic, analogues of the peptide; moreover, the main mode(s)/mechanism(s) through which humanin and humanin analogues may exert in vitro and in vivo regarding neuroprotection have been reported. The prospects of humanin and humanin analogues to be further investigated in the frame of future research endeavors against neurodegenerative/neural diseases have also been briefly discussed.
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Affiliation(s)
| | - Evangelia Livaniou
- Immunopeptide Chemistry Lab., Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Centre for Scientific Research “Demokritos”, P.O. Box 60037, 153 10 Agia Paraskevi, Greece;
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Nusir A, Sinclair P, Kabbani N. Mitochondrial Proteomes in Neural Cells: A Systematic Review. Biomolecules 2023; 13:1638. [PMID: 38002320 PMCID: PMC10669788 DOI: 10.3390/biom13111638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/07/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023] Open
Abstract
Mitochondria are ancient endosymbiotic double membrane organelles that support a wide range of eukaryotic cell functions through energy, metabolism, and cellular control. There are over 1000 known proteins that either reside within the mitochondria or are transiently associated with it. These mitochondrial proteins represent a functional subcellular protein network (mtProteome) that is encoded by mitochondrial and nuclear genomes and significantly varies between cell types and conditions. In neurons, the high metabolic demand and differential energy requirements at the synapses are met by specific modifications to the mtProteome, resulting in alterations in the expression and functional properties of the proteins involved in energy production and quality control, including fission and fusion. The composition of mtProteomes also impacts the localization of mitochondria in axons and dendrites with a growing number of neurodegenerative diseases associated with changes in mitochondrial proteins. This review summarizes the findings on the composition and properties of mtProteomes important for mitochondrial energy production, calcium and lipid signaling, and quality control in neural cells. We highlight strategies in mass spectrometry (MS) proteomic analysis of mtProteomes from cultured cells and tissue. The research into mtProteome composition and function provides opportunities in biomarker discovery and drug development for the treatment of metabolic and neurodegenerative disease.
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Affiliation(s)
- Aya Nusir
- Interdisciplinary Program in Neuroscience, School of Systems Biology, George Mason University, Fairfax, VA 22030, USA;
| | - Patricia Sinclair
- School of Systems Biology, George Mason University, Fairfax, VA 22030, USA;
| | - Nadine Kabbani
- Interdisciplinary Program in Neuroscience, School of Systems Biology, George Mason University, Fairfax, VA 22030, USA;
- School of Systems Biology, George Mason University, Fairfax, VA 22030, USA;
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9
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Plascencia-Villa G, Perry G. Exploring Molecular Targets for Mitochondrial Therapies in Neurodegenerative Diseases. Int J Mol Sci 2023; 24:12486. [PMID: 37569861 PMCID: PMC10419704 DOI: 10.3390/ijms241512486] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/27/2023] [Accepted: 07/31/2023] [Indexed: 08/13/2023] Open
Abstract
The progressive deterioration of function and structure of brain cells in neurodegenerative diseases is accompanied by mitochondrial dysfunction, affecting cellular metabolism, intracellular signaling, cell differentiation, morphogenesis, and the activation of programmed cell death. However, most of the efforts to develop therapies for Alzheimer's and Parkinson's disease have focused on restoring or maintaining the neurotransmitters in affected neurons, removing abnormal protein aggregates through immunotherapies, or simply treating symptomatology. However, none of these approaches to treating neurodegeneration can stop or reverse the disease other than by helping to maintain mental function and manage behavioral symptoms. Here, we discuss alternative molecular targets for neurodegeneration treatments that focus on mitochondrial functions, including regulation of calcium ion (Ca2+) transport, protein modification, regulation of glucose metabolism, antioxidants, metal chelators, vitamin supplementation, and mitochondrial transference to compromised neurons. After pre-clinical evaluation and studies in animal models, some of these therapeutic compounds have advanced to clinical trials and are expected to have positive outcomes in subjects with neurodegeneration. These mitochondria-targeted therapeutic agents are an alternative to established or conventional molecular targets that have shown limited effectiveness in treating neurodegenerative diseases.
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Affiliation(s)
- Germán Plascencia-Villa
- Department of Neuroscience, Developmental and Regenerative Biology, The University of Texas at San Antonio (UTSA), San Antonio, TX 78249, USA;
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Tashiro R, Ozaki D, Bautista-Garrido J, Sun G, Obertas L, Mobley AS, Kim GS, Aronowski J, Jung JE. Young Astrocytic Mitochondria Attenuate the Elevated Level of CCL11 in the Aged Mice, Contributing to Cognitive Function Improvement. Int J Mol Sci 2023; 24:ijms24065187. [PMID: 36982260 PMCID: PMC10049211 DOI: 10.3390/ijms24065187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/11/2023] Open
Abstract
Aging drives cognitive decline, and mitochondrial dysfunction is a hallmark of age-induced neurodegeneration. Recently, we demonstrated that astrocytes secrete functional mitochondria (Mt), which help adjacent cells to resist damage and promote repair after neurological injuries. However, the relationship between age-dependent changes in astrocytic Mt function and cognitive decline remains poorly understood. Here, we established that aged astrocytes secret less functional Mt compared to young astrocytes. We found the aging factor C-C motif chemokine 11 (CCL11) is elevated in the hippocampus of aged mice, and that its level is reduced upon systemic administration of young Mt, in vivo. Aged mice receiving young Mt, but not aged Mt improved cognitive function and hippocampal integrity. Using a CCL11-induced aging-like model in vitro, we found that astrocytic Mt protect hippocampal neurons and enhance a regenerative environment through upregulating synaptogenesis-related gene expression and anti-oxidants that were suppressed by CCL11. Moreover, the inhibition of CCL11-specific receptor C-C chemokine receptor 3 (CCR3) boosted the expression of synaptogenesis-related genes in the cultured hippocampal neurons and restored the neurite outgrowth. This study suggests that young astrocytic Mt can preserve cognitive function in the CCL11-mediated aging brain by promoting neuronal survival and neuroplasticity in the hippocampus.
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Borbor M, Yin D, Brockmeier U, Wang C, Doeckel M, Pillath-Eilers M, Kaltwasser B, Hermann DM, Dzyubenko E. Neurotoxicity of ischemic astrocytes involves STAT3-mediated metabolic switching and depends on glycogen usage. Glia 2023; 71:1553-1569. [PMID: 36810803 DOI: 10.1002/glia.24357] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 02/24/2023]
Abstract
Astrocytic responses are critical for the maintenance of neuronal networks in health and disease. In stroke, reactive astrocytes undergo functional changes potentially contributing to secondary neurodegeneration, but the mechanisms of astrocyte-mediated neurotoxicity remain elusive. Here, we investigated metabolic reprogramming in astrocytes following ischemia-reperfusion in vitro, explored their role in synaptic degeneration, and verified the key findings in a mouse model of stroke. Using indirect cocultures of primary mouse astrocytes and neurons, we demonstrate that transcription factor STAT3 controls metabolic switching in ischemic astrocytes promoting lactate-directed glycolysis and hindering mitochondrial function. Upregulation of astrocytic STAT3 signaling associated with nuclear translocation of pyruvate kinase isoform M2 and hypoxia response element activation. Reprogrammed thereby, the ischemic astrocytes induced mitochondrial respiration failure in neurons and triggered glutamatergic synapse loss, which was prevented by inhibiting astrocytic STAT3 signaling with Stattic. The rescuing effect of Stattic relied on the ability of astrocytes to utilize glycogen bodies as an alternative metabolic source supporting mitochondrial function. After focal cerebral ischemia in mice, astrocytic STAT3 activation was associated with secondary synaptic degeneration in the perilesional cortex. Inflammatory preconditioning with LPS increased astrocytic glycogen content, reduced synaptic degeneration, and promoted neuroprotection post stroke. Our data indicate the central role of STAT3 signaling and glycogen usage in reactive astrogliosis and suggest novel targets for restorative stroke therapy.
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Affiliation(s)
- Mina Borbor
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Dongpei Yin
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Ulf Brockmeier
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Chen Wang
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Marius Doeckel
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Matthias Pillath-Eilers
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Britta Kaltwasser
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Dirk M Hermann
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Egor Dzyubenko
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
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Hayakawa K. Commentary: Can astrocytic mitochondria therapy be used as antioxidant conditioning to protect neurons? CONDITIONING MEDICINE 2022; 5:192-195. [PMID: 38037662 PMCID: PMC10688760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
In the context of central nervous system (CNS) disease, oxidative stress may cause progression of cell death and neuroinflammation. Therefore, restoring mitochondrial antioxidant ability within cells is a major therapeutic strategy in many CNS disorders. A recent study uncovers a novel mechanism of astrocytic mitochondria being neuroprotective after intracerebral hemorrhage in mice. In their work, systemic administration of mitochondria obtained from astrocytes restores neuronal antioxidant defense, prevents neuronal death while promoting neurite outgrowth, indicating that extracellular mitochondria may play key roles in mediating beneficial non-cell autonomous effects. Given that mitochondria are also responsible for tolerance to stress and injury, is it possible that exogenous mitochondria signals may regulate cellular conditioning by boosting antioxidant ability? Further studies are warranted to build on these emerging findings in the pursuit of conditioning therapies mediated by mitochondrial transplantation in CNS injury and disease.
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Affiliation(s)
- Kazuhide Hayakawa
- Neuroprotection Research Laboratories, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts, USA
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Mitochondria Transfer in Brain Injury and Disease. Cells 2022; 11:cells11223603. [PMID: 36429030 PMCID: PMC9688459 DOI: 10.3390/cells11223603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/09/2022] [Accepted: 11/12/2022] [Indexed: 11/16/2022] Open
Abstract
Intercellular mitochondria transfer is a novel form of cell signalling in which whole mitochondria are transferred between cells in order to enhance cellular functions or aid in the degradation of dysfunctional mitochondria. Recent studies have observed intercellular mitochondria transfer between glia and neurons in the brain, and mitochondrial transfer has emerged as a key neuroprotective mechanism in a range of neurological conditions. In particular, artificial mitochondria transfer has sparked widespread interest as a potential therapeutic strategy for brain disorders. In this review, we discuss the mechanisms and effects of intercellular mitochondria transfer in the brain. The role of mitochondrial transfer in neurological conditions, including neurodegenerative disease, brain injury, and neurodevelopmental disorders, is discussed as well as therapeutic strategies targeting mitochondria transfer in the brain.
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