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Marzook H, Gupta A, Jayakumar MN, Saleh MA, Tomar D, Qaisar R, Ahmad F. GSK-3α-BNIP3 axis promotes mitophagy in human cardiomyocytes under hypoxia. Free Radic Biol Med 2024; 221:235-244. [PMID: 38815772 DOI: 10.1016/j.freeradbiomed.2024.05.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/24/2024] [Accepted: 05/25/2024] [Indexed: 06/01/2024]
Abstract
Dysregulated autophagy/mitophagy is one of the major causes of cardiac injury in ischemic conditions. Glycogen synthase kinase-3alpha (GSK-3α) has been shown to play a crucial role in the pathophysiology of cardiac diseases. However, the precise role of GSK-3α in cardiac mitophagy remains unknown. Herein, we investigated the role of GSK-3α in cardiac mitophagy by employing AC16 human cardiomyocytes under the condition of acute hypoxia. We observed that the gain-of-GSK-3α function profoundly induced mitophagy in the AC16 cardiomyocytes post-hypoxia. Moreover, GSK-3α overexpression led to increased ROS generation and mitochondrial dysfunction in cardiomyocytes, accompanied by enhanced mitophagy displayed by increased mt-mKeima intensity under hypoxia. Mechanistically, we identified that GSK-3α promotes mitophagy through upregulation of BNIP3, caused by GSK-3α-mediated increase in expression of HIF-1α and FOXO3a in cardiomyocytes post-hypoxia. Moreover, GSK-3α displayed a physical interaction with BNIP3 and, inhibited PINK1 and Parkin recruitment to mitochondria was observed specifically under hypoxia. Taken together, we identified a novel mechanism of mitophagy in human cardiomyocytes. GSK-3α promotes mitochondrial dysfunction and regulates FOXO3a -mediated BNIP3 overexpression in cardiomyocytes to facilitate mitophagy following hypoxia. An interaction between GSK-3α and BNIP3 suggests a role of GSK-3α in BNIP3 recruitment to the mitochondrial membrane where it enhances mitophagy in stressed cardiomyocytes independent of the PINK1/Parkin.
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Affiliation(s)
- Hezlin Marzook
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, 27272, United Arab Emirates
| | - Anamika Gupta
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, 27272, United Arab Emirates
| | - Manju N Jayakumar
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, 27272, United Arab Emirates
| | - Mohamed A Saleh
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, 27272, United Arab Emirates; Department of Clinical Sciences, College of Medicine, University of Sharjah, Sharjah, 27272, United Arab Emirates; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
| | - Dhanendra Tomar
- Department of Internal Medicine, Section on Cardiovascular Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, 27157, USA
| | - Rizwan Qaisar
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, 27272, United Arab Emirates; Department of Basic Medical Sciences, College of Medicine, University of Sharjah, Sharjah, 27272, United Arab Emirates
| | - Firdos Ahmad
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, 27272, United Arab Emirates; Department of Basic Medical Sciences, College of Medicine, University of Sharjah, Sharjah, 27272, United Arab Emirates.
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2
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Zhang ZW, Zhang KX, Liao X, Quan Y, Zhang HY. Evolutionary screening of precision oncology biomarkers and its applications in prognostic model construction. iScience 2024; 27:109859. [PMID: 38799582 PMCID: PMC11126775 DOI: 10.1016/j.isci.2024.109859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 03/15/2024] [Accepted: 04/27/2024] [Indexed: 05/29/2024] Open
Abstract
Biomarker screening is critical for precision oncology. However, one of the main challenges in precision oncology is that the screened biomarkers often fail to achieve the expected clinical effects and are rarely approved by regulatory authorities. Considering the close association between cancer pathogenesis and the evolutionary events of organisms, we first explored the evolutionary feature underlying clinically approved biomarkers, and two evolutionary features of approved biomarkers (Ohnologs and specific evolutionary stages of genes) were identified. Subsequently, we utilized evolutionary features for screening potential prognostic biomarkers in four common cancers: head and neck squamous cell carcinoma, liver hepatocellular carcinoma, lung adenocarcinoma, and lung squamous cell carcinoma. Finally, we constructed an evolution-strengthened prognostic model (ESPM) for cancers. These models can predict cancer patients' survival time across different cancer cohorts effectively and perform better than conventional models. In summary, our study highlights the application potentials of evolutionary information in precision oncology biomarker screening.
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Affiliation(s)
- Zhi-Wen Zhang
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan 430070, P.R. China
| | - Ke-Xin Zhang
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan 430070, P.R. China
| | - Xuan Liao
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan 430070, P.R. China
| | - Yuan Quan
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan 430070, P.R. China
| | - Hong-Yu Zhang
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan 430070, P.R. China
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3
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Eickhorst C, Babic R, Rush-Kittle J, Lucya L, Imam FL, Sánchez-Martín P, Hollenstein DM, Michaelis J, Münch C, Meisinger C, Slade D, Gámez-Díaz L, Kraft C. FIP200 Phosphorylation Regulates Late Steps in Mitophagy. J Mol Biol 2024:168631. [PMID: 38821350 DOI: 10.1016/j.jmb.2024.168631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Revised: 05/18/2024] [Accepted: 05/27/2024] [Indexed: 06/02/2024]
Abstract
Mitophagy is a specific type of autophagy responsible for the selective elimination of dysfunctional or superfluous mitochondria, ensuring the maintenance of mitochondrial quality control. The initiation of mitophagy is coordinated by the ULK1 kinase complex, which engages mitophagy receptors via its FIP200 subunit. Whether FIP200 performs additional functions in the subsequent later phases of mitophagy beyond this initial step and how its regulation occurs, remains unclear. Our findings reveal that multiple phosphorylation events on FIP200 differentially control the early and late stages of mitophagy. Furthermore, these phosphorylation events influence FIP200's interaction with ATG16L1. In summary, our results highlight the necessity for precise and dynamic regulation of FIP200, underscoring its importance in the progression of mitophagy.
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Affiliation(s)
- Christopher Eickhorst
- Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany; Spemann Graduate School of Biology and Medicine (SGBM), University of Freiburg, 79104 Freiburg, Germany
| | - Riccardo Babic
- Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany
| | - Jorrell Rush-Kittle
- Spemann Graduate School of Biology and Medicine (SGBM), University of Freiburg, 79104 Freiburg, Germany; Institute for Immunodeficiency, Center for Chronic Immunodeficiency (CCI), Faculty of Medicine, University Medical Center Freiburg, 79106 Freiburg, Germany
| | - Leon Lucya
- Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany
| | - Fatimah Lami Imam
- Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany
| | - Pablo Sánchez-Martín
- Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany
| | - David M Hollenstein
- Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; Department for Biochemistry and Cell Biology, University of Vienna, Center for Molecular Biology, Vienna Biocenter Campus (VBC), Dr. Bohr-Gasse 9, 1030 Vienna, Austria; Mass Spectrometry Facility, Max Perutz Labs, Vienna Biocenter Campus (VBC), Dr. Bohr-Gasse 7, 1030 Vienna, Austria
| | - Jonas Michaelis
- Institute of Molecular Systems Medicine, Faculty of Medicine, Goethe University Frankfurt, 60590 Frankfurt, Germany
| | - Christian Münch
- Institute of Molecular Systems Medicine, Faculty of Medicine, Goethe University Frankfurt, 60590 Frankfurt, Germany
| | - Chris Meisinger
- Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; BIOSS Centre for Biological Signalling Studies, University of Freiburg, 79104 Freiburg, Germany; CIBSS - Centre for Integrative Biological Signalling Studies, University of Freiburg, 79104 Freiburg, Germany
| | - Dea Slade
- Department of Radiation Oncology, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria; Comprehensive Cancer Center, Medical University of Vienna, Spitalgasse 23, 1090 Vienna, Austria; Department of Medical Biochemistry, Medical University of Vienna, Max Perutz Labs, Vienna Biocenter, Dr. Bohr-Gasse 9, 1030 Vienna, Austria
| | - Laura Gámez-Díaz
- Institute for Immunodeficiency, Center for Chronic Immunodeficiency (CCI), Faculty of Medicine, University Medical Center Freiburg, 79106 Freiburg, Germany; CIBSS - Centre for Integrative Biological Signalling Studies, University of Freiburg, 79104 Freiburg, Germany.
| | - Claudine Kraft
- Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; CIBSS - Centre for Integrative Biological Signalling Studies, University of Freiburg, 79104 Freiburg, Germany.
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4
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Babenko V, Redina O, Smagin D, Kovalenko I, Galyamina A, Kudryavtseva N. Brain-Region-Specific Genes Form the Major Pathways Featuring Their Basic Functional Role: Their Implication in Animal Chronic Stress Model. Int J Mol Sci 2024; 25:2882. [PMID: 38474132 DOI: 10.3390/ijms25052882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/30/2024] [Accepted: 02/19/2024] [Indexed: 03/14/2024] Open
Abstract
The analysis of RNA-Sec data from murine bulk tissue samples taken from five brain regions associated with behavior and stress response was conducted. The focus was on the most contrasting brain region-specific genes (BRSG) sets in terms of their expression rates. These BRSGs are identified as genes with a distinct outlying (high) expression rate in a specific region compared to others used in the study. The analysis suggested that BRSG sets form non-randomly connected compact gene networks, which correspond to the major neuron-mediated functional processes or pathways in each brain region. The number of BRSGs and the connection rate were found to depend on the heterogeneity and coordinated firing rate of neuron types in each brain region. The most connected pathways, along with the highest BRSG number, were observed in the Striatum, referred to as Medium Spiny Neurons (MSNs), which make up 95% of neurons and exhibit synchronous firing upon dopamine influx. However, the Ventral Tegmental Area/Medial Raphe Nucleus (VTA/MRN) regions, although primarily composed of monoaminergic neurons, do not fire synchronously, leading to a smaller BRSG number. The Hippocampus (HPC) region, on the other hand, displays significant neuronal heterogeneity, with glutamatergic neurons being the most numerous and synchronized. Interestingly, the two monoaminergic regions involved in the study displayed a common BRSG subnetwork architecture, emphasizing their proximity in terms of axonal throughput specifics and high-energy metabolism rates. This finding suggests the concerted evolution of monoaminergic neurons, leading to unique adaptations at the genic repertoire scale. With BRSG sets, we were able to highlight the contrasting features of the three groups: control, depressive, and aggressive mice in the animal chronic stress model. Specifically, we observed a decrease in serotonergic turnover in both the depressed and aggressive groups, while dopaminergic emission was high in both groups. There was also a notable absence of dopaminoceptive receptors on the postsynaptic membranes in the striatum in the depressed group. Additionally, we confirmed that neurogenesis BRSGs are specific to HPC, with the aggressive group showing attenuated neurogenesis rates compared to the control/depressive groups. We also confirmed that immune-competent cells like microglia and astrocytes play a crucial role in depressed phenotypes, including mitophagy-related gene Prkcd. Based on this analysis, we propose the use of BRSG sets as a suitable framework for evaluating case-control group-wise assessments of specific brain region gene pathway responses.
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Affiliation(s)
- Vladimir Babenko
- Federal Research Center Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Olga Redina
- Federal Research Center Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Dmitry Smagin
- Federal Research Center Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Irina Kovalenko
- Federal Research Center Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Anna Galyamina
- Federal Research Center Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Natalia Kudryavtseva
- Federal Research Center Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
- Pavlov Institute of Physiology, Russian Academy of Sciences, Saint Petersburg 199034, Russia
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5
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Onraet T, Zuryn S. C. elegans as a model to study mitochondrial biology and disease. Semin Cell Dev Biol 2024; 154:48-58. [PMID: 37149409 DOI: 10.1016/j.semcdb.2023.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/18/2023] [Accepted: 04/26/2023] [Indexed: 05/08/2023]
Abstract
Mitochondria perform a myriad of essential functions that ensure organismal homeostasis, including maintaining bioenergetic capacity, sensing and signalling the presence of pathogenic threats, and determining cell fate. Their function is highly dependent on mitochondrial quality control and the appropriate regulation of mitochondrial size, shape, and distribution during an entire lifetime, as well as their inheritance across generations. The roundworm Caenorhabditis elegans has emerged as an ideal model organism through which to study mitochondria. The remarkable conservation of mitochondrial biology has allowed C. elegans researchers to investigate complex processes that are challenging to study in higher organisms. In this review, we explore the key recent contributions of C. elegans to mitochondrial biology through the lens of mitochondrial dynamics, organellar removal, and mitochondrial inheritance, as well as their involvement in immune responses, various types of stress, and transgenerational signalling.
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Affiliation(s)
- Tessa Onraet
- Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane 4072, Australia
| | - Steven Zuryn
- Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane 4072, Australia.
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6
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Chandra S, Katiyar P, Durairaj AS, Wang X. Mitochondrial Calcium Transport During Autophagy Initiation. MITOCHONDRIAL COMMUNICATIONS 2024; 2:14-20. [PMID: 38347884 PMCID: PMC10861220 DOI: 10.1016/j.mitoco.2024.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/15/2024]
Abstract
While it has been shown that Ca2+ dynamics at the ER membrane is essential for the initiation of certain types of autophagy such as starvation-induced autophagy, how mitochondrial Ca2+ transport changes during the first stage of autophagy is not systemically characterized. An investigation of mitochondrial Ca2+ dynamics during autophagy initiation may help us determine the relationship between autophagy and mitochondrial Ca2+ fluxes. Here we examine acute mitochondrial and ER calcium responses to a panel of autophagy inducers in different cell types. Mitochondrial Ca2+ transport and Ca2+ transients at the ER membrane are triggered by different autophagy inducers. The mitophagy-inducer-initiated mitochondrial Ca2+ uptake relies on mitochondrial calcium uniporter and may decelerate the following mitophagy. In neurons derived from a Parkinson's patient, mitophagy-inducer-triggered mitochondrial Ca2+ influx is faster, which may slow the ensuing mitophagy.
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Affiliation(s)
- Sujyoti Chandra
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA94305, USA
| | - Parul Katiyar
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA94305, USA
| | - Aarooran S Durairaj
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA94305, USA
| | - Xinnan Wang
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA94305, USA
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7
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Bharat V, Durairaj AS, Vanhauwaert R, Li L, Muir CM, Chandra S, Kwak CS, Le Guen Y, Nandakishore P, Hsieh CH, Rensi SE, Altman RB, Greicius MD, Feng L, Wang X. A mitochondrial inside-out iron-calcium signal reveals drug targets for Parkinson's disease. Cell Rep 2023; 42:113544. [PMID: 38060381 PMCID: PMC10804639 DOI: 10.1016/j.celrep.2023.113544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 09/11/2023] [Accepted: 11/17/2023] [Indexed: 12/30/2023] Open
Abstract
Dysregulated iron or Ca2+ homeostasis has been reported in Parkinson's disease (PD) models. Here, we discover a connection between these two metals at the mitochondria. Elevation of iron levels causes inward mitochondrial Ca2+ overflow, through an interaction of Fe2+ with mitochondrial calcium uniporter (MCU). In PD neurons, iron accumulation-triggered Ca2+ influx across the mitochondrial surface leads to spatially confined Ca2+ elevation at the outer mitochondrial membrane, which is subsequently sensed by Miro1, a Ca2+-binding protein. A Miro1 blood test distinguishes PD patients from controls and responds to drug treatment. Miro1-based drug screens in PD cells discover Food and Drug Administration-approved T-type Ca2+-channel blockers. Human genetic analysis reveals enrichment of rare variants in T-type Ca2+-channel subtypes associated with PD status. Our results identify a molecular mechanism in PD pathophysiology and drug targets and candidates coupled with a convenient stratification method.
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Affiliation(s)
- Vinita Bharat
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Aarooran S Durairaj
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Roeland Vanhauwaert
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Li Li
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Colin M Muir
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA; Graduate Program of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Sujyoti Chandra
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Chulhwan S Kwak
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Yann Le Guen
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA 94305, USA; Institut du Cerveau - Paris Brain Institute - ICM, 75013 Paris, France
| | | | - Chung-Han Hsieh
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Stefano E Rensi
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Russ B Altman
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Michael D Greicius
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Liang Feng
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Xinnan Wang
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA.
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Picca A, Faitg J, Auwerx J, Ferrucci L, D'Amico D. Mitophagy in human health, ageing and disease. Nat Metab 2023; 5:2047-2061. [PMID: 38036770 DOI: 10.1038/s42255-023-00930-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 10/13/2023] [Indexed: 12/02/2023]
Abstract
Maintaining optimal mitochondrial function is a feature of health. Mitophagy removes and recycles damaged mitochondria and regulates the biogenesis of new, fully functional ones preserving healthy mitochondrial functions and activities. Preclinical and clinical studies have shown that impaired mitophagy negatively affects cellular health and contributes to age-related chronic diseases. Strategies to boost mitophagy have been successfully tested in model organisms, and, recently, some have been translated into clinics. In this Review, we describe the basic mechanisms of mitophagy and how mitophagy can be assessed in human blood, the immune system and tissues, including muscle, brain and liver. We outline mitophagy's role in specific diseases and describe mitophagy-activating approaches successfully tested in humans, including exercise and nutritional and pharmacological interventions. We describe how mitophagy is connected to other features of ageing through general mechanisms such as inflammation and oxidative stress and forecast how strengthening research on mitophagy and mitophagy interventions may strongly support human health.
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Affiliation(s)
- Anna Picca
- Department of Medicine and Surgery, LUM University, Casamassima, Italy
- Fondazione Policlinico Universitario 'A. Gemelli' IRCCS, Rome, Italy
| | - Julie Faitg
- Amazentis, EPFL Innovation Park, Lausanne, Switzerland
| | - Johan Auwerx
- Laboratory of Integrative Systems Physiology, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Luigi Ferrucci
- Division of Intramural Research, National Institute on Aging, Baltimore, MD, USA.
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Häussler S, Ghaffari MH, Seibt K, Sadri H, Alaedin M, Huber K, Frahm J, Dänicke S, Sauerwein H. Blood and liver telomere length, mitochondrial DNA copy number, and hepatic gene expression of mitochondrial dynamics in mid-lactation cows supplemented with l-carnitine under systemic inflammation. J Dairy Sci 2023; 106:9822-9842. [PMID: 37641324 DOI: 10.3168/jds.2023-23556] [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: 03/31/2023] [Accepted: 06/21/2023] [Indexed: 08/31/2023]
Abstract
The current study was conducted to examine the effect of l-carnitine (LC) supplementation on telomere length and mitochondrial DNA copy number (mtDNAcn) per cell in mid-lactation cows challenged by lipopolysaccharide (LPS) in blood and liver. The mRNA abundance of 31 genes related to inflammation, oxidative stress, and the corresponding stress response mechanisms, the mitochondrial quality control and the protein import system, as well as the phosphatidylinositol 3-kinase/protein kinase B pathway, were assessed using microfluidics integrated fluidic circuit chips (96.96 dynamic arrays). In addition to comparing the responses in cows with or without LC, our objectives were to characterize the oxidative and inflammatory status by assessing the circulating concentration of lactoferrin (Lf), haptoglobin (Hp), fibrinogen, derivates of reactive oxygen metabolites (dROM), and arylesterase activity (AEA), and to extend the measurement of Lf and Hp to milk. Pluriparous Holstein cows were assigned to either a control group (CON, n = 26) or an LC-supplemented group (CAR; 25 g LC/cow per day; d 42 ante partum to d 126 postpartum (PP), n = 27). On d 111 PP, each cow was injected intravenously with LPS (Escherichia coli O111:B4, 0.5 µg/kg). The mRNA abundance was examined in liver biopsies of d -11 and +1 relative to LPS administration. Plasma and milk samples were frequently collected before and after the challenge. After LPS administration, circulating plasma fibrinogen and serum dROM concentrations increased, whereas AEA decreased. Moreover, serum P4 initially increased by 3 h after LPS administration and declined thereafter irrespective of grouping. The Lf concentrations increased in both groups after LPS administration, with the CAR group showing greater concentrations in serum and milk than the CON group. After LPS administration, telomere length in blood increased, whereas mtDNAcn per cell decreased; however, both remained unaffected in liver. For mitochondrial protein import genes, the hepatic mRNA abundance of the translocase of the mitochondrial inner membrane (TIM)-17B was increased in CAR cows. Moreover, TIM23 increased in both groups after LPS administration. Regarding the mRNA abundance of genes related to stress response mechanisms, 7 out of 14 genes showed group × time interactions, indicating a (local) protective effect due to the dietary LC supplementation against oxidative stress in mid-lactating dairy cows. For mtDNAcn and telomere length, the effects of the LPS-induced inflammation were more pronounced than the dietary supplementation of LC. Dietary LC supplementation affected the response to LPS primarily by altering mitochondrial dynamics. Regarding mRNA abundance of genes related to the mitochondrial protein import system, the inner mitochondrial membrane translocase (TIM complex) seemed to be more sensitive to dietary LC than the outer mitochondrial membrane translocase (TOM complex).
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Affiliation(s)
- S Häussler
- Institute of Animal Science, Physiology Unit, University of Bonn, 53115 Bonn, Germany
| | - M H Ghaffari
- Institute of Animal Science, Physiology Unit, University of Bonn, 53115 Bonn, Germany.
| | - K Seibt
- Institute of Animal Science, Physiology Unit, University of Bonn, 53115 Bonn, Germany
| | - H Sadri
- Department of Clinical Science, Faculty of Veterinary Medicine, University of Tabriz, 516616471 Tabriz, Iran
| | - M Alaedin
- Institute of Animal Science, Physiology Unit, University of Bonn, 53115 Bonn, Germany
| | - K Huber
- Institute of Animal Science, Functional Anatomy of Livestock, University of Hohenheim, 70599 Stuttgart, Germany
| | - J Frahm
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 38116 Braunschweig, Germany
| | - S Dänicke
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 38116 Braunschweig, Germany
| | - H Sauerwein
- Institute of Animal Science, Physiology Unit, University of Bonn, 53115 Bonn, Germany
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10
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Uoselis L, Nguyen TN, Lazarou M. Mitochondrial degradation: Mitophagy and beyond. Mol Cell 2023; 83:3404-3420. [PMID: 37708893 DOI: 10.1016/j.molcel.2023.08.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 08/10/2023] [Accepted: 08/17/2023] [Indexed: 09/16/2023]
Abstract
Mitochondria are central hubs of cellular metabolism that also play key roles in signaling and disease. It is therefore fundamentally important that mitochondrial quality and activity are tightly regulated. Mitochondrial degradation pathways contribute to quality control of mitochondrial networks and can also regulate the metabolic profile of mitochondria to ensure cellular homeostasis. Here, we cover the many and varied ways in which cells degrade or remove their unwanted mitochondria, ranging from mitophagy to mitochondrial extrusion. The molecular signals driving these varied pathways are discussed, including the cellular and physiological contexts under which the different degradation pathways are engaged.
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Affiliation(s)
- Louise Uoselis
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia; Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia; Aligning Science Across Parkinson's Collaborative Research Network, Chevy Chase, MD 20185, USA
| | - Thanh Ngoc Nguyen
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia; Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia; Aligning Science Across Parkinson's Collaborative Research Network, Chevy Chase, MD 20185, USA.
| | - Michael Lazarou
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia; Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia; Aligning Science Across Parkinson's Collaborative Research Network, Chevy Chase, MD 20185, USA.
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Li J, Liu W, Sun W, Rao X, Chen X, Yu L. A Study on Autophagy Related Biomarkers in Alzheimer's Disease Based on Bioinformatics. Cell Mol Neurobiol 2023; 43:3693-3703. [PMID: 37418137 DOI: 10.1007/s10571-023-01379-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 06/20/2023] [Indexed: 07/08/2023]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease with an annual incidence increase that poses significant health risks to people. However, the pathogenesis of AD is still unclear. Autophagy, as an intracellular mechanism can degrade damaged cellular components and abnormal proteins, which is closely related to AD pathology. The goal of this work is to uncover the intimate association between autophagy and AD, and to mine potential autophagy-related AD biomarkers by identifying key differentially expressed autophagy genes (DEAGs) and exploring the potential functions of these genes. GSE63061 and GSE140831 gene expression profiles of AD were downloaded from the Gene Expression Omnibus (GEO) database. R language was used to standardize and differentially expressed genes (DEGs) of AD expression profiles. A total of 259 autophagy-related genes were discovered through the autophagy gene databases ATD and HADb. The differential genes of AD and autophagy genes were integrated and analyzed to screen out DEAGs. Then the potential biological functions of DEAGs were predicted, and Cytoscape software was used to detect the key DEAGs. There were ten DEAGs associated with the AD development, including nine up-regulated genes (CAPNS1, GAPDH, IKBKB, LAMP1, LAMP2, MAPK1, PRKCD, RAB24, RAF1) and one down-regulated gene (CASP1). The correlation analysis reveals the potential correlation among 10 core DEAGs. Finally, the significance of the detected DEAGs expression was verified, and the value of DEAGs in AD pathology was detected by the receiver operating characteristic curve. The area under the curve values indicated that ten DEAGs are potentially valuable for the study of the pathological mechanism and may become biomarkers of AD. This pathway analysis and DEAG screening in this study found a strong association between autophagy-related genes and AD, providing new insights into the pathological progression of AD. Exploring the relationship between autophagy and AD: analysis of genes associated with autophagy in pathological mechanisms of AD using bioinformatics. 10 autophagy-related genes play an important role in the pathological mechanisms of AD.
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Affiliation(s)
- Jian Li
- School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Wenjia Liu
- School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Wen Sun
- School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Xin Rao
- School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, 310018, China.
| | - Xiaodong Chen
- School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, 310018, China.
- School of Electronic Engineering and Computer Science, Queen Mary University of London, London, E1 4NS, UK.
| | - Liyang Yu
- School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, 310018, China.
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12
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Godtliebsen G, Larsen KB, Bhujabal Z, Opstad IS, Nager M, Punnakkal AR, Kalstad TB, Olsen R, Lund T, Prasad DK, Agarwal K, Myrmel T, Birgisdottir AB. High-resolution visualization and assessment of basal and OXPHOS-induced mitophagy in H9c2 cardiomyoblasts. Autophagy 2023; 19:2769-2788. [PMID: 37405374 PMCID: PMC10472865 DOI: 10.1080/15548627.2023.2230837] [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: 12/09/2022] [Revised: 06/09/2023] [Accepted: 06/22/2023] [Indexed: 07/06/2023] Open
Abstract
Mitochondria are susceptible to damage resulting from their activity as energy providers. Damaged mitochondria can cause harm to the cell and thus mitochondria are subjected to elaborate quality-control mechanisms including elimination via lysosomal degradation in a process termed mitophagy. Basal mitophagy is a house-keeping mechanism fine-tuning the number of mitochondria according to the metabolic state of the cell. However, the molecular mechanisms underlying basal mitophagy remain largely elusive. In this study, we visualized and assessed the level of mitophagy in H9c2 cardiomyoblasts at basal conditions and after OXPHOS induction by galactose adaptation. We used cells with a stable expression of a pH-sensitive fluorescent mitochondrial reporter and applied state-of-the-art imaging techniques and image analysis. Our data showed a significant increase in acidic mitochondria after galactose adaptation. Using a machine-learning approach we also demonstrated increased mitochondrial fragmentation by OXPHOS induction. Furthermore, super-resolution microscopy of live cells enabled capturing of mitochondrial fragments within lysosomes as well as dynamic transfer of mitochondrial contents to lysosomes. Applying correlative light and electron microscopy we revealed the ultrastructure of the acidic mitochondria confirming their proximity to the mitochondrial network, ER and lysosomes. Finally, exploiting siRNA knockdown strategy combined with flux perturbation with lysosomal inhibitors, we demonstrated the importance of both canonical as well as non-canonical autophagy mediators in lysosomal degradation of mitochondria after OXPHOS induction. Taken together, our high-resolution imaging approaches applied on H9c2 cells provide novel insights on mitophagy during physiologically relevant conditions. The implication of redundant underlying mechanisms highlights the fundamental importance of mitophagy.Abbreviations: ATG: autophagy related; ATG7: autophagy related 7; ATP: adenosine triphosphate; BafA1: bafilomycin A1; CLEM: correlative light and electron microscopy; EGFP: enhanced green fluorescent protein; MAP1LC3B: microtubule associated protein 1 light chain 3 beta; OXPHOS: oxidative phosphorylation; PepA: pepstatin A; PLA: proximity ligation assay; PRKN: parkin RBR E3 ubiquitin protein ligase; RAB5A: RAB5A, member RAS oncogene family; RAB7A: RAB7A, member RAS oncogene family; RAB9A: RAB9A, member RAS oncogene family; ROS: reactive oxygen species; SIM: structured illumination microscopy; siRNA: short interfering RNA; SYNJ2BP: synaptojanin 2 binding protein; TEM: transmission electron microscopy; TOMM20: translocase of outer mitochondrial membrane 20; ULK1: unc-51 like kinase 1.
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Affiliation(s)
- Gustav Godtliebsen
- Department of Clinical Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Kenneth Bowitz Larsen
- Department of Clinical Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
- Department of Medical Biology, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Zambarlal Bhujabal
- Department of Clinical Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Ida S. Opstad
- Department of Physics and Technology, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Mireia Nager
- Division of Cardiothoracic and Respiratory Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
| | | | - Trine B. Kalstad
- Division of Cardiothoracic and Respiratory Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Randi Olsen
- Department of Medical Biology, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Trine Lund
- Department of Medical Biology, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Dilip K. Prasad
- Department of Computer Science, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Krishna Agarwal
- Department of Physics and Technology, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Truls Myrmel
- Department of Clinical Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
- Division of Cardiothoracic and Respiratory Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Asa Birna Birgisdottir
- Department of Clinical Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
- Division of Cardiothoracic and Respiratory Medicine, UiT-The Arctic University of Norway, Tromsø, Norway
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13
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Harraz MM. Selective dopaminergic vulnerability in Parkinson's disease: new insights into the role of DAT. Front Neurosci 2023; 17:1219441. [PMID: 37694119 PMCID: PMC10483232 DOI: 10.3389/fnins.2023.1219441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 07/31/2023] [Indexed: 09/12/2023] Open
Abstract
One of the hallmarks of Parkinson's disease (PD) is the progressive loss of dopaminergic neurons and associated dopamine depletion. Several mechanisms, previously considered in isolation, have been proposed to contribute to the pathophysiology of dopaminergic degeneration: dopamine oxidation-mediated neurotoxicity, high dopamine transporter (DAT) expression density per neuron, and autophagy-lysosome pathway (ALP) dysfunction. However, the interrelationships among these mechanisms remained unclear. Our recent research bridges this gap, recognizing autophagy as a novel dopamine homeostasis regulator, unifying these concepts. I propose that autophagy modulates dopamine reuptake by selectively degrading DAT. In PD, ALP dysfunction could increase DAT density per neuron, and enhance dopamine reuptake, oxidation, and neurotoxicity, potentially contributing to the progressive loss of dopaminergic neurons. This integrated understanding may provide a more comprehensive view of aspects of PD pathophysiology and opens new avenues for therapeutic interventions.
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Affiliation(s)
- Maged M. Harraz
- Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD, United States
- Department of Pharmacology, University of Maryland School of Medicine, Baltimore, MD, United States
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14
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Dong Y, Zhuang XX, Wang YT, Tan J, Feng D, Li M, Zhong Q, Song Z, Shen HM, Fang EF, Lu JH. Chemical mitophagy modulators: Drug development strategies and novel regulatory mechanisms. Pharmacol Res 2023; 194:106835. [PMID: 37348691 DOI: 10.1016/j.phrs.2023.106835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 06/09/2023] [Accepted: 06/19/2023] [Indexed: 06/24/2023]
Abstract
Maintaining mitochondrial homeostasis is a potential therapeutic strategy for various diseases, including neurodegenerative diseases, cardiovascular diseases, metabolic disorders, and cancer. Selective degradation of mitochondria by autophagy (mitophagy) is a fundamental mitochondrial quality control mechanism conserved from yeast to humans. Indeed, small-molecule modulators of mitophagy are valuable pharmaceutical tools that can be used to dissect complex biological processes and turn them into potential drugs. In the past few years, pharmacological regulation of mitophagy has shown promising therapeutic efficacy in various disease models. However, with the increasing number of chemical mitophagy modulator studies, frequent methodological flaws can be observed, leading some studies to draw unreliable or misleading conclusions. This review attempts (a) to summarize the molecular mechanisms of mitophagy; (b) to propose a Mitophagy Modulator Characterization System (MMCS); (c) to perform a comprehensive analysis of methods used to characterize mitophagy modulators, covering publications over the past 20 years; (d) to provide novel targets for pharmacological intervention of mitophagy. We believe this review will provide a panorama of current research on chemical mitophagy modulators and promote the development of safe and robust mitophagy modulators with therapeutic potential by introducing high methodological standards.
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Affiliation(s)
- Yu Dong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, 999078, Macau
| | - Xu-Xu Zhuang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, 999078, Macau
| | - Yi-Ting Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, 999078, Macau
| | - Jieqiong Tan
- Center for medical genetics, Central South University, Changsha 410031, Hunan, China
| | - Du Feng
- Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, College of Basic Medical Science, Guangzhou Medical University, Guangzhou 511436, Guangdong, China
| | - Min Li
- Mr. & Mrs. Ko Chi-Ming Centre for Parkinson's Disease Research, School of Chinese Medicine, Hong Kong Baptist University, 999077, Hong Kong Special Administrative Region
| | - Qing Zhong
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Zhiyin Song
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Frontier Science Center for Immunology and Metabolism, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, Hubei, China
| | - Han-Ming Shen
- Department of Biomedical Sciences, Faculty of Health Sciences, Ministry of Education Frontiers Science Center for Precision Oncology, University of Macau, 999078, Macau
| | - Evandro F Fang
- Department of Clinical Molecular Biology, University of Oslo and Akershus University Hospital, 1478 Lørenskog, Norway
| | - Jia-Hong Lu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, 999078, Macau.
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15
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Zhang S, Yi S, Wang L, Li S, Wang H, Song L, Ou J, Zhang M, Wang R, Wang M, Zheng Y, Yang K, Liu T, Ho MS. Cyclin-G-associated kinase GAK/dAux regulates autophagy initiation via ULK1/Atg1 in glia. Proc Natl Acad Sci U S A 2023; 120:e2301002120. [PMID: 37428930 PMCID: PMC10629559 DOI: 10.1073/pnas.2301002120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 06/08/2023] [Indexed: 07/12/2023] Open
Abstract
Autophagy is a major means for the elimination of protein inclusions in neurons in neurodegenerative diseases such as Parkinson's disease (PD). Yet, the mechanism of autophagy in the other brain cell type, glia, is less well characterized and remains largely unknown. Here, we present evidence that the PD risk factor, Cyclin-G-associated kinase (GAK)/Drosophila homolog Auxilin (dAux), is a component in glial autophagy. The lack of GAK/dAux increases the autophagosome number and size in adult fly glia and mouse microglia, and generally up-regulates levels of components in the initiation and PI3K class III complexes. GAK/dAux interacts with the master initiation regulator UNC-51like autophagy activating kinase 1/Atg1 via its uncoating domain and regulates the trafficking of Atg1 and Atg9 to autophagosomes, hence controlling the onset of glial autophagy. On the other hand, lack of GAK/dAux impairs the autophagic flux and blocks substrate degradation, suggesting that GAK/dAux might play additional roles. Importantly, dAux contributes to PD-like symptoms including dopaminergic neurodegeneration and locomotor function in flies. Our findings identify an autophagy factor in glia; considering the pivotal role of glia under pathological conditions, targeting glial autophagy is potentially a therapeutic strategy for PD.
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Affiliation(s)
- Shiping Zhang
- School of Life Science and Technology, ShanghaiTech University, Shanghai201210, China
| | - Shuanglong Yi
- School of Life Science and Technology, ShanghaiTech University, Shanghai201210, China
- University of Chinese Academy of Sciences, Beijing100049, China
| | - Linfang Wang
- School of Life Science and Technology, ShanghaiTech University, Shanghai201210, China
- University of Chinese Academy of Sciences, Beijing100049, China
| | - Shuhua Li
- School of Life Science and Technology, ShanghaiTech University, Shanghai201210, China
| | - Honglei Wang
- School of Life Science and Technology, ShanghaiTech University, Shanghai201210, China
| | - Li Song
- Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai200092, China
| | - Jiayao Ou
- Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai200092, China
| | - Min Zhang
- School of Life Science and Technology, ShanghaiTech University, Shanghai201210, China
| | - Ruiqi Wang
- School of Life Science and Technology, ShanghaiTech University, Shanghai201210, China
| | - Mengxiao Wang
- School of Life Science and Technology, ShanghaiTech University, Shanghai201210, China
| | - Yuchen Zheng
- School of Life Science and Technology, ShanghaiTech University, Shanghai201210, China
| | - Kai Yang
- International Academic Center of Complex Systems, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai519087, China
| | - Tong Liu
- Institute of Neuroscience, State Key Laboratory of Neuroscience, Chinese Academy of Sciences Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai200031, China
| | - Margaret S. Ho
- School of Life Science and Technology, ShanghaiTech University, Shanghai201210, China
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16
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Binder V, Li W, Faisal M, Oyman K, Calkins DL, Shaffer J, Teets EM, Sher S, Magnotte A, Belardo A, Deruelle W, Gregory TC, Orwick S, Hagedorn EJ, Perlin JR, Avagyan S, Lichtig A, Barrett F, Ammerman M, Yang S, Zhou Y, Carson WE, Shive HR, Blachly JS, Lapalombella R, Zon LI, Blaser BW. Microenvironmental control of hematopoietic stem cell fate via CXCL8 and protein kinase C. Cell Rep 2023; 42:112528. [PMID: 37209097 PMCID: PMC10824047 DOI: 10.1016/j.celrep.2023.112528] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 03/19/2023] [Accepted: 05/02/2023] [Indexed: 05/22/2023] Open
Abstract
Altered hematopoietic stem cell (HSC) fate underlies primary blood disorders but microenvironmental factors controlling this are poorly understood. Genetically barcoded genome editing of synthetic target arrays for lineage tracing (GESTALT) zebrafish were used to screen for factors expressed by the sinusoidal vascular niche that alter the phylogenetic distribution of the HSC pool under native conditions. Dysregulated expression of protein kinase C delta (PKC-δ, encoded by prkcda) increases the number of HSC clones by up to 80% and expands polyclonal populations of immature neutrophil and erythroid precursors. PKC agonists such as cxcl8 augment HSC competition for residency within the niche and expand defined niche populations. CXCL8 induces association of PKC-δ with the focal adhesion complex, activating extracellular signal-regulated kinase (ERK) signaling and expression of niche factors in human endothelial cells. Our findings demonstrate the existence of reserve capacity within the niche that is controlled by CXCL8 and PKC and has significant impact on HSC phylogenetic and phenotypic fate.
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Affiliation(s)
- Vera Binder
- Dr. von Hauner Childrens' Hospital, University Hospital Ludwig Maximillian's University, Department of Pediatric Hematology/Oncology, 80337 Munich, Germany
| | - Wantong Li
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - Muhammad Faisal
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - Konur Oyman
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - Donn L Calkins
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - Jami Shaffer
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - Emily M Teets
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - Steven Sher
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - Andrew Magnotte
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - Alex Belardo
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - William Deruelle
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - T Charles Gregory
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA; The Ohio State University College of Medicine, Department of Biomedical Informatics, Columbus, OH 43210, USA
| | - Shelley Orwick
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - Elliott J Hagedorn
- Boston University School of Medicine, Department of Medicine, Boston, MA 02118, USA
| | - Julie R Perlin
- Stem Cell Program, Division of Hematology/Oncology, Boston Children's Hospital and Dana Farber Cancer Institute, Boston, MA 02115, USA
| | - Serine Avagyan
- Dana-Farber/Boston Children's Hospital Cancer and Blood Disorders Center, Boston, MA 02115, USA
| | - Asher Lichtig
- Stem Cell Program, Division of Hematology/Oncology, Boston Children's Hospital and Dana Farber Cancer Institute, Boston, MA 02115, USA
| | - Francesca Barrett
- Stem Cell Program, Division of Hematology/Oncology, Boston Children's Hospital and Dana Farber Cancer Institute, Boston, MA 02115, USA
| | - Michelle Ammerman
- Stem Cell Program, Division of Hematology/Oncology, Boston Children's Hospital and Dana Farber Cancer Institute, Boston, MA 02115, USA
| | - Song Yang
- Stem Cell Program, Division of Hematology/Oncology, Boston Children's Hospital and Dana Farber Cancer Institute, Boston, MA 02115, USA
| | - Yi Zhou
- Stem Cell Program, Division of Hematology/Oncology, Boston Children's Hospital and Dana Farber Cancer Institute, Boston, MA 02115, USA
| | - William E Carson
- The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - Heather R Shive
- Laboratory of Cancer Biology and Genetics, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA
| | - James S Blachly
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA; The Ohio State University College of Medicine, Department of Biomedical Informatics, Columbus, OH 43210, USA
| | - Rosa Lapalombella
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA
| | - Leonard I Zon
- Stem Cell Program, Division of Hematology/Oncology, Boston Children's Hospital and Dana Farber Cancer Institute, Boston, MA 02115, USA; Dana-Farber/Boston Children's Hospital Cancer and Blood Disorders Center, Boston, MA 02115, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA; Stem Cell and Regenerative Biology Department, Harvard University, Cambridge, MA 02138, USA
| | - Bradley W Blaser
- The Ohio State University College of Medicine, Department of Internal Medicine, Division of Hematology, Columbus, OH 43210, USA; The Ohio State University Comprehensive Cancer Center, James Cancer Hospital and Solove Research Institute, Columbus, OH 43210, USA.
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17
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Huang C, Ji C, Wang J. Current thoughts on cellular functions of numb-associated kinases. Mol Biol Rep 2023; 50:4645-4652. [PMID: 37014568 PMCID: PMC10072014 DOI: 10.1007/s11033-023-08372-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 03/02/2023] [Indexed: 04/05/2023]
Abstract
Members of the Numb-associated kinase family of serine/threonine kinases play an essential role in many cellular processes, such as endocytosis, autophagy, dendrite morphogenesis, osteoblast differentiation, and the regulation of the Notch pathway. Numb-associated kinases have been relevant to diverse diseases, including neuropathic pain, Parkinson's disease, and prostate cancer. Therefore, they are considered potential therapeutic targets. In addition, it is reported that Numb-associated kinases have been involved in the life cycle of multiple viruses such as hepatitis C virus (HCV), Ebola virus (EBOV), and dengue virus (DENV). Recently, Coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) continues to threaten global health. Studies show that Numb-associated kinases are implicated in the infection of SARS-CoV-2 which can be suppressed by Numb-associated kinases inhibitors. Thus, Numb-associated kinases are proposed as potential host targets for broad-spectrum antiviral strategies. We will focus on the recent advances in Numb-associated kinases-related cellular functions and their potential as host targets for viral infections in this review. Questions that remained unknown on the cellular functions of Numb-associated kinases will also be discussed.
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Affiliation(s)
- Chenxi Huang
- Department of Biology, Faculty of Environment and Life, Beijing University of Technology, 100124, Beijing, China
| | - Cuicui Ji
- Department of Biology, Faculty of Environment and Life, Beijing University of Technology, 100124, Beijing, China.
| | - Juan Wang
- Department of Biology, Faculty of Environment and Life, Beijing University of Technology, 100124, Beijing, China.
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18
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Role of Mitophagy in Regulating Intestinal Oxidative Damage. Antioxidants (Basel) 2023; 12:antiox12020480. [PMID: 36830038 PMCID: PMC9952109 DOI: 10.3390/antiox12020480] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
The mitochondrion is also a major site for maintaining redox homeostasis between reactive oxygen species (ROS) generation and scavenging. The quantity, quality, and functional integrity of mitochondria are crucial for regulating intracellular homeostasis and maintaining the normal physiological function of cells. The role of oxidative stress in human disease is well established, particularly in inflammatory bowel disease and gastrointestinal mucosal diseases. Oxidative stress could result from an imbalance between ROS and the antioxidative system. Mitochondria are both the main sites of production and the main target of ROS. It is a vicious cycle in which initial ROS-induced mitochondrial damage enhanced ROS production that, in turn, leads to further mitochondrial damage and eventually massive intestinal cell death. Oxidative damage can be significantly mitigated by mitophagy, which clears damaged mitochondria. In this review, we aimed to review the molecular mechanisms involved in the regulation of mitophagy and oxidative stress and their relationship in some intestinal diseases. We believe the reviews can provide new ideas and a scientific basis for researching antioxidants and preventing diseases related to oxidative damage.
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19
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Li J, Yang D, Li Z, Zhao M, Wang D, Sun Z, Wen P, Dai Y, Gou F, Ji Y, Zhao D, Yang L. PINK1/Parkin-mediated mitophagy in neurodegenerative diseases. Ageing Res Rev 2023; 84:101817. [PMID: 36503124 DOI: 10.1016/j.arr.2022.101817] [Citation(s) in RCA: 39] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 11/21/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022]
Abstract
Mitochondria play key roles in bioenergetics, metabolism, and signaling; therefore, stable mitochondrial function is essential for cell survival, particularly in energy-intensive neuronal cells. In neurodegenerative diseases, damaged mitochondria accumulate in neurons causing associated bioenergetics deficiency, impaired cell signaling, defective cytoplasmic calcium buffering, and other pathological changes. Mitochondrial quality control is an important mechanism to ensure the maintenance of mitochondrial health, homeostasis, and mitophagy, the latter of which is a pathway that delivers defective mitochondria to the lysosome for degradation. Defective mitophagy is thought to be responsible for the accumulation of damaged mitochondria, which leads to cellular dysfunction and/or death in neurodegenerative diseases. PINK1/Parkin mainly regulates ubiquitin-dependent mitophagy, which is crucial for many aspects of mitochondrial physiology, particularly the initiation of autophagic mechanisms. Therefore, in the present review, we summarize the current knowledge of the conventional mitophagy pathway, focusing on the molecular mechanisms underlying mitophagy dysregulation in prion disease and other age-related neurodegenerative diseases, especially in relation to the PINK1/Parkin pathway. Moreover, we list the inducers of mitophagy that possess neuroprotective effects, in addition to their mechanisms related to the PINK1/Parkin pathway. These mechanisms may provide potential interventions centered on the regulation of mitophagy and offer therapeutic strategies for the treatment of neurodegenerative diseases.
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Affiliation(s)
- Jie Li
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Dongming Yang
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Zhiping Li
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Mengyang Zhao
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Dongdong Wang
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Zhixin Sun
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Pei Wen
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Yuexin Dai
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Fengting Gou
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Yilan Ji
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Deming Zhao
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China
| | - Lifeng Yang
- National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, State Key Laboratories for Agrobiotechnology, Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China.
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20
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Paraoxonase-2 contributes to promoting lipid metabolism and mitochondrial function via autophagy activation. Sci Rep 2022; 12:21483. [PMID: 36509805 PMCID: PMC9744871 DOI: 10.1038/s41598-022-25802-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 12/05/2022] [Indexed: 12/14/2022] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is an increasingly prevalent immuno-metabolic disease that can progress to hepatic cirrhosis and cancer. NAFLD pathogenesis is extremely complex and is characterized by oxidative stress, impaired mitochondrial function and lipid metabolism, and cellular inflammation. Thus, in-depth research on its underlying mechanisms and subsequent investigation into a potential drug target that has overarching effects on these features will help in the discovery of effective treatments for NAFLD. Our study examines the role of endogenous paraoxonase-2 (PON2), a membrane protein with reported antioxidant activity, in an in vitro cell model of NAFLD. We found that the hepatic loss of PON2 activity aggravated steatosis and oxidative stress under lipotoxic conditions, and our transcriptome analysis revealed that the loss of PON2 disrupts the activation of numerous functional pathways closely related to NAFLD pathogenesis, including mitochondrial respiratory capacity, lipid metabolism, and hepatic fibrosis and inflammation. We found that PON2 promoted the activation of the autophagy pathway, specifically the mitophagy cargo sequestration, which could potentially aid PON2 in alleviating oxidative stress, mitochondrial dysfunction, lipid accumulation, and inflammation. These results provide a mechanistic foundation for the prospect of PON2 as a drug target, leading to the development of novel therapeutics for NAFLD.
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21
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Abstract
Mitochondria are crucial organelles that play a central role in various cell signaling and metabolic pathways. A healthy mitochondrial population is maintained through a series of quality control pathways and requires a fine-tuned balance between mitochondrial biogenesis and degradation. Defective targeting of dysfunctional mitochondria to lysosomes through mitophagy has been linked to several diseases, but the underlying mechanisms and the relative importance of distinct mitophagy pathways in vivo are largely unknown. In this Cell Science at a Glance and the accompanying poster, we describe our current understanding of how parts of, or whole, mitochondria are recognized by the autophagic machinery and targeted to lysosomes for degradation. We also discuss how this might be regulated under different physiological conditions to maintain mitochondrial and cellular health.
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Affiliation(s)
- Ian G. Ganley
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK
| | - Anne Simonsen
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway
- Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, University of Oslo, 0318 Oslo, Norway
- Department of Molecular Cell Biology, Institute for Cancer Research, Oslo University Hospital Montebello, 0379 Oslo, Norway
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22
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Liang JR, Corn JE. A CRISPR view on autophagy. Trends Cell Biol 2022; 32:1008-1022. [PMID: 35581059 DOI: 10.1016/j.tcb.2022.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 04/05/2022] [Accepted: 04/06/2022] [Indexed: 01/21/2023]
Abstract
Autophagy is a fundamental pathway for the degradation of cytoplasmic content in response to pleiotropic extracellular and intracellular stimuli. Recent advances in the autophagy field have demonstrated that different organelles can also be specifically targeted for autophagy with broad implications on cellular and organismal health. This opens new dimensions in the autophagy field and more unanswered questions on the rationale and underlying mechanisms to degrade different organelles. Functional genomics via clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9-based screening has gained popularity in the autophagy field to understand the common and unique factors that are implicated in the signaling, recognition, and execution of different cargo-specific autophagies. We focus on recent applications of CRISPR-based screens in the autophagy field, their discoveries, and the future directions of autophagy screens.
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Affiliation(s)
- Jin Rui Liang
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093, Zürich, Switzerland; Medical Research Council, Protein Phosphorylation & Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dow Street, Dundee DD1 5EH, UK.
| | - Jacob E Corn
- Department of Biology, Institute of Molecular Health Sciences, ETH Zürich, 8093, Zürich, Switzerland.
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23
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Ng MYW, Charsou C, Lapao A, Singh S, Trachsel-Moncho L, Schultz SW, Nakken S, Munson MJ, Simonsen A. The cholesterol transport protein GRAMD1C regulates autophagy initiation and mitochondrial bioenergetics. Nat Commun 2022; 13:6283. [PMID: 36270994 PMCID: PMC9586981 DOI: 10.1038/s41467-022-33933-2] [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: 07/02/2021] [Accepted: 10/05/2022] [Indexed: 12/25/2022] Open
Abstract
During autophagy, cytosolic cargo is sequestered into double-membrane vesicles called autophagosomes. The contributions of specific lipids, such as cholesterol, to the membranes that form the autophagosome, remain to be fully characterized. Here, we demonstrate that short term cholesterol depletion leads to a rapid induction of autophagy and a corresponding increase in autophagy initiation events. We further show that the ER-localized cholesterol transport protein GRAMD1C functions as a negative regulator of starvation-induced autophagy and that both its cholesterol transport VASt domain and membrane binding GRAM domain are required for GRAMD1C-mediated suppression of autophagy initiation. Similar to its yeast orthologue, GRAMD1C associates with mitochondria through its GRAM domain. Cells lacking GRAMD1C or its VASt domain show increased mitochondrial cholesterol levels and mitochondrial oxidative phosphorylation, suggesting that GRAMD1C may facilitate cholesterol transfer at ER-mitochondria contact sites. Finally, we demonstrate that expression of GRAMD family proteins is linked to clear cell renal carcinoma survival, highlighting the pathophysiological relevance of cholesterol transport proteins.
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Affiliation(s)
- Matthew Yoke Wui Ng
- grid.5510.10000 0004 1936 8921Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway ,grid.5510.10000 0004 1936 8921Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, University of Oslo, 0450 Oslo, Norway
| | - Chara Charsou
- grid.5510.10000 0004 1936 8921Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway ,grid.5510.10000 0004 1936 8921Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, University of Oslo, 0450 Oslo, Norway
| | - Ana Lapao
- grid.5510.10000 0004 1936 8921Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway ,grid.5510.10000 0004 1936 8921Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, University of Oslo, 0450 Oslo, Norway
| | - Sakshi Singh
- grid.5510.10000 0004 1936 8921Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway ,grid.5510.10000 0004 1936 8921Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, University of Oslo, 0450 Oslo, Norway
| | - Laura Trachsel-Moncho
- grid.5510.10000 0004 1936 8921Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway ,grid.5510.10000 0004 1936 8921Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, University of Oslo, 0450 Oslo, Norway
| | - Sebastian W. Schultz
- grid.5510.10000 0004 1936 8921Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, University of Oslo, 0450 Oslo, Norway ,grid.55325.340000 0004 0389 8485Department of Molecular Cell Biology, Institute for Cancer Research, Oslo University Hospital Montebello, 0379 Oslo, Norway
| | - Sigve Nakken
- grid.5510.10000 0004 1936 8921Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, University of Oslo, 0450 Oslo, Norway ,grid.55325.340000 0004 0389 8485Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital Montebello, 0379 Oslo, Norway
| | - Michael J. Munson
- grid.5510.10000 0004 1936 8921Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway ,grid.5510.10000 0004 1936 8921Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, University of Oslo, 0450 Oslo, Norway ,grid.418151.80000 0001 1519 6403Present Address: Advanced Drug Delivery, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Anne Simonsen
- grid.5510.10000 0004 1936 8921Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway ,grid.5510.10000 0004 1936 8921Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, University of Oslo, 0450 Oslo, Norway ,grid.55325.340000 0004 0389 8485Department of Molecular Cell Biology, Institute for Cancer Research, Oslo University Hospital Montebello, 0379 Oslo, Norway
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24
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Discovery of Mitophagy Inhibitors with Therapeutic Potential in Different Familial Amyotrophic Lateral Sclerosis Mutations. Int J Mol Sci 2022; 23:ijms232012676. [PMID: 36293534 PMCID: PMC9603920 DOI: 10.3390/ijms232012676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/12/2022] [Accepted: 10/19/2022] [Indexed: 11/05/2022] Open
Abstract
Mitophagy is the selective degradation of mitochondria by autophagy. It promotes the turnover of mitochondria and prevents the accumulation of dysfunctional mitochondria, which can lead to cellular degeneration. Mitophagy is known to be altered in several pathological conditions, especially in neurodegenerative diseases such as amyotrophic lateral sclerosis (ALS). We recently demonstrated an increase in autophagy flux in lymphoblasts from ALS patients bearing a mutation in SOD1. Thus, the identification of mitophagy inhibitors may be a therapeutic option to recover mitochondrial homeostasis. Here, using a phenotypic mitophagy assay, we identified a new mitophagy inhibitor, the small molecule named IGS2.7 from the MBC library. Interestingly, the treatment of different cellular and in vivo models of ALS with mutations on SOD1 and TARDBP with this inhibitor restores autophagy to control levels. These results point mitophagy inhibitors, especially IGS2.7, to a new therapeutic approach for familial ALS patients.
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25
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Lang M, Pramstaller PP, Pichler I. Crosstalk of organelles in Parkinson's disease - MiT family transcription factors as central players in signaling pathways connecting mitochondria and lysosomes. Mol Neurodegener 2022; 17:50. [PMID: 35842725 PMCID: PMC9288732 DOI: 10.1186/s13024-022-00555-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 07/01/2022] [Indexed: 11/10/2022] Open
Abstract
Living organisms constantly need to adapt to their surrounding environment and have evolved sophisticated mechanisms to deal with stress. Mitochondria and lysosomes are central organelles in the response to energy and nutrient availability within a cell and act through interconnected mechanisms. However, when such processes become overwhelmed, it can lead to pathologies. Parkinson's disease (PD) is a common neurodegenerative disorder (NDD) characterized by proteinaceous intracellular inclusions and progressive loss of dopaminergic neurons, which causes motor and non-motor symptoms. Genetic and environmental factors may contribute to the disease etiology. Mitochondrial dysfunction has long been recognized as a hallmark of PD pathogenesis, and several aspects of mitochondrial biology are impaired in PD patients and models. In addition, defects of the autophagy-lysosomal pathway have extensively been observed in cell and animal models as well as PD patients' brains, where constitutive autophagy is indispensable for adaptation to stress and energy deficiency. Genetic and molecular studies have shown that the functions of mitochondria and lysosomal compartments are tightly linked and influence each other. Connections between these organelles are constituted among others by mitophagy, organellar dynamics and cellular signaling cascades, such as calcium (Ca2+) and mTOR (mammalian target of rapamycin) signaling and the activation of transcription factors. Members of the Microphthalmia-associated transcription factor family (MiT), including MITF, TFE3 and TFEB, play a central role in regulating cellular homeostasis in response to metabolic pressure and are considered master regulators of lysosomal biogenesis. As such, they are part of the interconnection between mitochondria and lysosome functions and therefore represent attractive targets for therapeutic approaches against NDD, including PD. The activation of MiT transcription factors through genetic and pharmacological approaches have shown encouraging results at ameliorating PD-related phenotypes in in vitro and in vivo models. In this review, we summarize the relationship between mitochondrial and autophagy-lysosomal functions in the context of PD etiology and focus on the role of the MiT pathway and its potential as pharmacological target against PD.
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Affiliation(s)
- Martin Lang
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Bolzano, Italy.
| | - Peter P Pramstaller
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Bolzano, Italy.,Department of Neurology, University Medical Center Schleswig-Holstein, Campus Lübeck, Lübeck, Germany
| | - Irene Pichler
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Bolzano, Italy
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26
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Chen X, Wang Q, Li S, Li XJ, Yang W. Mitochondrial-Dependent and Independent Functions of PINK1. Front Cell Dev Biol 2022; 10:954536. [PMID: 35874823 PMCID: PMC9305176 DOI: 10.3389/fcell.2022.954536] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 06/16/2022] [Indexed: 11/25/2022] Open
Abstract
PINK1 has been characterized as a mitochondrial kinase that can target to damaged mitochondria to initiate mitophagy, a process to remove unhealthy mitochondria for protecting neuronal cells. Mutations of the human PINK1 gene are also found to cause early onset Parkinson’s disease, a neurodegenerative disorder with the pathological feature of mitochondrial dysfunction. Despite compelling evidence from in vitro studies to support the role of PINK1 in regulation of mitochondrial function, there is still lack of strong in vivo evidence to validate PINK1-mediated mitophagy in the brain. In addition, growing evidence indicates that PINK1 also executes function independent of mitochondria. In this review, we discuss the mitochondrial dependent and independent functions of PINK1, aiming at elucidating how PINK1 functions differentially under different circumstances.
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27
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Cao SQ, Aman Y, Fang EF, Tencomnao T. P. edulis Extract Protects Against Amyloid-β Toxicity in Alzheimer's Disease Models Through Maintenance of Mitochondrial Homeostasis via the FOXO3/DAF-16 Pathway. Mol Neurobiol 2022; 59:5612-5629. [PMID: 35739408 DOI: 10.1007/s12035-022-02904-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 05/26/2022] [Indexed: 01/04/2023]
Abstract
Alzheimer's disease (AD) is a common and devastating disease characterized by pathological aggregations of beta-amyloid (Aβ) plaques extracellularly, and Tau tangles intracellularly. While our understandings of the aetiologies of AD have greatly expanded over the decades, there is no drug available to stop disease progression. Here, we demonstrate the potential of Passiflora edulis (P. edulis) pericarp extract in protecting against Aβ-mediated neurotoxicity in mammalian cells and Caenorhabditis elegans (C. elegans) models of AD. We show P. edulis pericarp protects against memory deficit and neuronal loss, and promotes longevity in the Aβ model of AD via stimulation of mitophagy, a selective cellular clearance of damaged and dysfunctional mitochondria. P. edulis pericarp also restores memory and increases neuronal resilience in a C. elegans Tau model of AD. While defective mitophagy-induced accumulation of damaged mitochondria contributes to AD progression, P. edulis pericarp improves mitochondrial quality and homeostasis through BNIP3/DCT1-dependent mitophagy and SOD-3-dependent mitochondrial resilience, both via increased nuclear translocation of the upstream transcriptional regulator FOXO3/DAF-16. Further studies to identify active molecules in P. edulis pericarp that could maintain neuronal mitochondrial homeostasis may enable the development of potential drug candidates for AD.
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Affiliation(s)
- Shu-Qin Cao
- Ph.D. Program in Clinical Biochemistry and Molecular Medicine, Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, 10330, Thailand.,Department of Clinical Molecular Biology, University of Oslo and Akershus University Hospital, 1478, Lørenskog, Norway
| | - Yahyah Aman
- Department of Clinical Molecular Biology, University of Oslo and Akershus University Hospital, 1478, Lørenskog, Norway
| | - Evandro F Fang
- Department of Clinical Molecular Biology, University of Oslo and Akershus University Hospital, 1478, Lørenskog, Norway. .,The Norwegian Centre On Healthy Ageing (NO-Age), Oslo, Norway.
| | - Tewin Tencomnao
- Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, 10330, Thailand. .,Natural Products for Neuroprotection and Anti-Ageing Research Unit, Chulalongkorn University, Bangkok, 10330, Thailand.
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28
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Genetic Analysis of HSP40/DNAJ Family Genes in Parkinson's Disease: a Large Case-Control Study. Mol Neurobiol 2022; 59:5443-5451. [PMID: 35715682 DOI: 10.1007/s12035-022-02920-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 06/01/2022] [Indexed: 10/18/2022]
Abstract
Molecular chaperones were reported to play an important role in PD pathogenesis. Recent studies revealed the association of several HSP40/DNAJ family genes with PD, but no genetic analysis of all the DNAJ family genes in PD has been conducted. To systematically analyze the genetic impact of all the DNAJ family genes in PD, we performed genetic analysis for these genes in a large case-control study. We analyzed the rare variants in 49 DNAJ family genes from 3879 PD patients and 2931 healthy controls by whole-exome sequencing and whole-genome sequencing. All rare missense variants and the subgroups of rare damaging missense (Dmis) and loss-of-function (LoF) variants were gathered to test the accumulated association of these variants in each gene with PD. In total, 1617 rare nonsynonymous variants of DNAJ family genes with minor allele frequency less than 1% were identified in our cohort. We identified 82 rare missense variants for DNAJC26 in sporadic early-onset PD (sEOPD) or familial PD (FPD), and 17 Dmis and one LoF variant were detected among them. Gene-based burden analysis showed that the rare Dmis variants alone or Dmis plus LoF variants together of DNAJC26 were significantly enriched in PD patients. We also found suggestive associations of DNAJB2 and DNAJC18 with PD in sEOPD or FPD and DNAJC2, DNAJC10, DNAJC22, DNAJC24, DNAJC27, DNAJC28, and DNAJC29 with PD in sporadic late-onset PD. In conclusion, rare missense variants of DNAJC26 were significantly enriched in FPD or sEOPD. Moreover, DNAJB2, DNAJC2, DNAJC10, DNAJC18, DNAJC22, DNAJC24, DNAJC27, DNAJC28, and DNAJC29 were suggestively associated with PD.
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29
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Long M, Sanchez-Martinez A, Longo M, Suomi F, Stenlund H, Johansson AI, Ehsan H, Salo VT, Montava-Garriga L, Naddafi S, Ikonen E, Ganley IG, Whitworth AJ, McWilliams TG. DGAT1 activity synchronises with mitophagy to protect cells from metabolic rewiring by iron depletion. EMBO J 2022; 41:e109390. [PMID: 35411952 PMCID: PMC9108618 DOI: 10.15252/embj.2021109390] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 02/24/2022] [Accepted: 02/25/2022] [Indexed: 12/28/2022] Open
Abstract
Mitophagy removes defective mitochondria via lysosomal elimination. Increased mitophagy coincides with metabolic reprogramming, yet it remains unknown whether mitophagy is a cause or consequence of such state changes. The signalling pathways that integrate with mitophagy to sustain cell and tissue integrity also remain poorly defined. We performed temporal metabolomics on mammalian cells treated with deferiprone, a therapeutic iron chelator that stimulates PINK1/PARKIN-independent mitophagy. Iron depletion profoundly rewired the metabolome, hallmarked by remodelling of lipid metabolism within minutes of treatment. DGAT1-dependent lipid droplet biosynthesis occurred several hours before mitochondrial clearance, with lipid droplets bordering mitochondria upon iron chelation. We demonstrate that DGAT1 inhibition restricts mitophagy in vitro, with impaired lysosomal homeostasis and cell viability. Importantly, genetic depletion of DGAT1 in vivo significantly impaired neuronal mitophagy and locomotor function in Drosophila. Our data define iron depletion as a potent signal that rapidly reshapes metabolism and establishes an unexpected synergy between lipid homeostasis and mitophagy that safeguards cell and tissue integrity.
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Affiliation(s)
- Maeve Long
- Translational Stem Cell Biology & Metabolism Program, Research Programs Unit, Faculty of Medicine, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland
| | | | - Marianna Longo
- MRC Protein Phosphorylation & Ubiquitylation Unit, School of Life Sciences, The Sir James Black Centre, University of Dundee, Dundee, UK
| | - Fumi Suomi
- Translational Stem Cell Biology & Metabolism Program, Research Programs Unit, Faculty of Medicine, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland
| | - Hans Stenlund
- Swedish Metabolomics Centre, Department of Plant Physiology, Umeå University, Umeå, Sweden
| | - Annika I Johansson
- Swedish Metabolomics Centre, Department of Plant Physiology, Umeå University, Umeå, Sweden
| | - Homa Ehsan
- Translational Stem Cell Biology & Metabolism Program, Research Programs Unit, Faculty of Medicine, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland
| | - Veijo T Salo
- Translational Stem Cell Biology & Metabolism Program, Research Programs Unit, Faculty of Medicine, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland.,Department of Anatomy, Faculty of Medicine, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland.,Minerva Foundation Institute for Medical Research, Helsinki, Finland
| | - Lambert Montava-Garriga
- MRC Protein Phosphorylation & Ubiquitylation Unit, School of Life Sciences, The Sir James Black Centre, University of Dundee, Dundee, UK
| | - Seyedehshima Naddafi
- Translational Stem Cell Biology & Metabolism Program, Research Programs Unit, Faculty of Medicine, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland
| | - Elina Ikonen
- Translational Stem Cell Biology & Metabolism Program, Research Programs Unit, Faculty of Medicine, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland.,Department of Anatomy, Faculty of Medicine, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland.,Minerva Foundation Institute for Medical Research, Helsinki, Finland
| | - Ian G Ganley
- MRC Protein Phosphorylation & Ubiquitylation Unit, School of Life Sciences, The Sir James Black Centre, University of Dundee, Dundee, UK
| | | | - Thomas G McWilliams
- Translational Stem Cell Biology & Metabolism Program, Research Programs Unit, Faculty of Medicine, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland.,Department of Anatomy, Faculty of Medicine, Biomedicum Helsinki, University of Helsinki, Helsinki, Finland
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30
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Cable J, Weber-Ban E, Clausen T, Walters KJ, Sharon M, Finley DJ, Gu Y, Hanna J, Feng Y, Martens S, Simonsen A, Hansen M, Zhang H, Goodwin JM, Reggio A, Chang C, Ge L, Schulman BA, Deshaies RJ, Dikic I, Harper JW, Wertz IE, Thomä NH, Słabicki M, Frydman J, Jakob U, David DC, Bennett EJ, Bertozzi CR, Sardana R, Eapen VV, Carra S. Targeted protein degradation: from small molecules to complex organelles-a Keystone Symposia report. Ann N Y Acad Sci 2022; 1510:79-99. [PMID: 35000205 DOI: 10.1111/nyas.14745] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 12/10/2021] [Indexed: 12/15/2022]
Abstract
Targeted protein degradation is critical for proper cellular function and development. Protein degradation pathways, such as the ubiquitin proteasomes system, autophagy, and endosome-lysosome pathway, must be tightly regulated to ensure proper elimination of misfolded and aggregated proteins and regulate changing protein levels during cellular differentiation, while ensuring that normal proteins remain unscathed. Protein degradation pathways have also garnered interest as a means to selectively eliminate target proteins that may be difficult to inhibit via other mechanisms. On June 7 and 8, 2021, several experts in protein degradation pathways met virtually for the Keystone eSymposium "Targeting protein degradation: from small molecules to complex organelles." The event brought together researchers working in different protein degradation pathways in an effort to begin to develop a holistic, integrated vision of protein degradation that incorporates all the major pathways to understand how changes in them can lead to disease pathology and, alternatively, how they can be leveraged for novel therapeutics.
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Affiliation(s)
| | - Eilika Weber-Ban
- Institute of Molecular Biology and Biophysics, ETH Zurich, Zurich, Switzerland
| | - Tim Clausen
- Research Institute of Molecular Pathology (IMP), Vienna BioCenter and Medical University of Vienna, Vienna, Austria
| | - Kylie J Walters
- Protein Processing Section, Center for Structural Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, Maryland
| | - Michal Sharon
- Department of Bimolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Daniel J Finley
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts
| | - Yangnan Gu
- Department of Plant and Microbial Biology and Innovative Genomics Institute, University of California, Berkeley, California
| | - John Hanna
- Department of Pathology, Harvard Medical School and Brigham and Women's Hospital, Boston, Massachusetts
| | - Yue Feng
- Princess Margaret Cancer Centre, University Health Network and Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Sascha Martens
- Max Perutz Labs, University of Vienna, Vienna BioCenter (VBC), Vienna, Austria
| | - Anne Simonsen
- Department of Molecular Medicine, Institute of Basic Medical Sciences and Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Molecular Cell Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
| | - Malene Hansen
- Sanford Burnham Prebys Medical Discovery Institute, Program of Development, Aging, and Regeneration, La Jolla, California
| | - Hong Zhang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences and College of Life Sciences, University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | | | - Alessio Reggio
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | - Chunmei Chang
- Molecular and Cell Biology, University of California, Berkeley, Berkeley, California
| | - Liang Ge
- State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - Brenda A Schulman
- Department of Molecular Machines and Signaling, Max Planck Institute of Biochemistry, Martinsried, Germany
| | | | - Ivan Dikic
- Institute of Biochemistry II, School of Medicine and Buchmann Institute for Molecular Life Sciences, Goethe University, Frankfurt, Germany
| | - J Wade Harper
- Department of Cell Biology, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts
| | - Ingrid E Wertz
- Departments of Molecular Oncology and Early Discovery Biochemistry, Genentech, Inc., South San Francisco, California
- Bristol Myers Squibb, Brisbane, California
| | - Nicolas H Thomä
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
| | - Mikołaj Słabicki
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
- Division of Translational Medical Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Judith Frydman
- Biophysics Graduate Program, Department of Biology and Department of Genetics, Stanford University, Stanford, California
- Biohub, San Francisco, California
- Division of CryoEM and Bioimaging, SSRL, SLAC National Accelerator Laboratory, Menlo Park, California
| | - Ursula Jakob
- Department of Molecular, Cellular and Developmental Biology, College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, Michigan
| | - Della C David
- German Center for Neurodegenerative Diseases (DZNE), and Interfaculty Institute of Biochemistry, University of Tübingen, Tübingen, Germany
| | - Eric J Bennett
- Section of Cell and Developmental Biology, Division of Biological Sciences, University of California, San Diego, La Jolla, California
| | - Carolyn R Bertozzi
- Department of Chemistry and Stanford ChEM-H, Stanford University and Howard Hughes Medical Institute, Stanford, California
| | - Richa Sardana
- Weill Institute of Cell and Molecular Biology and Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York
| | - Vinay V Eapen
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts
| | - Serena Carra
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
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31
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Munson MJ, Mathai BJ, Ng MYW, Trachsel-Moncho L, de la Ballina LR, Simonsen A. GAK and PRKCD kinases regulate basal mitophagy. Autophagy 2022; 18:467-469. [PMID: 35001811 PMCID: PMC8942551 DOI: 10.1080/15548627.2021.2015154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The removal of mitochondria in a programmed or stress-induced manner is essential for maintaining cellular homeostasis. To date, much research has focused upon stress-induced mitophagy that is largely regulated by the E3 ligase PRKN, with limited insight into the mechanisms regulating basal “housekeeping” mitophagy levels in different model organisms. Using iron chelation as an inducer of PRKN-independent mitophagy, we recently screened an siRNA library of lipid-binding proteins and determined that two kinases, GAK and PRKCD, act as positive regulators of PRKN-independent mitophagy. We demonstrate that PRKCD is localized to mitochondria and regulates recruitment of ULK1-ATG13 upon induction of mitophagy. GAK activity, by contrast, modifies the mitochondrial network and lysosomal morphology that compromise efficient transport of mitochondria for degradation. Impairment of either kinase in vivo blocks basal mitophagy, demonstrating the biological relevance of our findings. Abbreviations: CCCP: carbonyl cyanide-m-chlorophenyl hydrazone; DFP: deferiprone; GAK: cyclin G associated kinase; HIF1A: hypoxia inducible factor 1 subunit alpha; PRKC/PKC: protein kinase C; PRKCD: protein kinase C delta; PRKN: parkin RBR E3 ubiquitin protein ligase.
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Affiliation(s)
- Michael J Munson
- Division of Biochemistry, Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.,Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.,Advanced Drug Delivery, Pharmaceutical Sciences, Biopharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Benan J Mathai
- Division of Biochemistry, Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.,Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Matthew Yoke Wui Ng
- Division of Biochemistry, Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.,Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Laura Trachsel-Moncho
- Division of Biochemistry, Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.,Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Laura R de la Ballina
- Division of Biochemistry, Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.,Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Anne Simonsen
- Division of Biochemistry, Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.,Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.,Department of Molecular Cell Biology, The Norwegian Radium Hospital Montebello, Oslo, Norway
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32
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Abstract
Mitophagy, a type of selective autophagy targeting damaged or superfluous mitochondria, is critical to maintain cell homeostasis. Besides the well-characterized PRKN-dependent mitophagy, PRKN-independent mitophagy also plays significant physiological roles. In a recent study, researchers from Anne Simonsen's lab discovered two lipid binding kinases, GAK and PRKCD, as positive regulators of PRKN-independent mitophagy. The researchers further investigated how these two proteins regulate mitophagy and demonstrated their roles in vivo. Focusing on the less known PRKN-independent mitophagy regulators, these findings shed light on understanding the mechanism of mitophagy and its relation to diseases.
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Affiliation(s)
- Yuchen Lei
- Life Sciences Institute and Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| | - Daniel J. Klionsky
- Life Sciences Institute and Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
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33
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Maestro I, de la Ballina LR, Simonsen A, Boya P, Martinez A. Phenotypic Assay Leads to Discovery of Mitophagy Inducers with Therapeutic Potential for Parkinson's Disease. ACS Chem Neurosci 2021; 12:4512-4523. [PMID: 34846852 DOI: 10.1021/acschemneuro.1c00529] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Mitophagy, the selective degradation of mitochondria by autophagy, involved in important physiological processes and defects in pathways has been reported in pathological conditions, such as neurodegeneration. Thus, mitophagy is an interesting target for drug discovery programs. In this investigation, we used robust phenotypic assay to screen a set of 50 small heterocyclic compounds to identify inducers of mitophagy. We identified two compounds, VP07 and JAR1.39, that induce Parkin-dependent mitophagy. Based on structure-activity relationship studies, we proposed the ability of the compounds to act as light chain 3 (LC3) interactors, similar to cardiolipin or ceramide, triggering mitophagy via Pink1/Parkin. Finally, we show promising therapeutic applicability in a cellular model of Parkinson's disease.
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Affiliation(s)
- Inés Maestro
- Centro de Investigaciones Biologicas Margarita Salas-CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain
- Centro de Investigacion Biomedica en Red en Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28031 Madrid, Spain
| | - Laura R. de la Ballina
- Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, 0372 Oslo, Norway
- Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 0450 Oslo, Norway
| | - Anne Simonsen
- Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, 0372 Oslo, Norway
- Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 0450 Oslo, Norway
| | - Patricia Boya
- Centro de Investigaciones Biologicas Margarita Salas-CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - Ana Martinez
- Centro de Investigaciones Biologicas Margarita Salas-CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain
- Centro de Investigacion Biomedica en Red en Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28031 Madrid, Spain
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