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Ghzaiel I, Maaloul S, Ksila M, Namsi A, Yammine A, Debbabi M, Badreddine A, Meddeb W, Pires V, Nury T, Ménétrier F, Avoscan L, Zarrouk A, Baarine M, Masmoudi-Kouki O, Ghrairi T, Abdellaoui R, Nasser B, Hammami S, Hammami M, Samadi M, Vejux A, Lizard G. In Vitro Evaluation of the Effects of 7-Ketocholesterol and 7β-Hydroxycholesterol on the Peroxisomal Status: Prevention of Peroxisomal Damages and Concept of Pexotherapy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1440:437-452. [PMID: 38036892 DOI: 10.1007/978-3-031-43883-7_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
7-Ketocholesterol and 7β-hydroxycholesterol are most often derived from the autoxidation of cholesterol. Their quantities are often increased in the body fluids and/or diseased organs of patients with age-related diseases such as cardiovascular diseases, Alzheimer's disease, age-related macular degeneration, and sarcopenia which are frequently associated with a rupture of RedOx homeostasis leading to a high oxidative stress contributing to cell and tissue damages. On murine cells from the central nervous system (158N oligodendrocytes, microglial BV-2 cells, and neuronal N2a cells) as well as on C2C12 murine myoblasts, these two oxysterols can induce a mode of cell death which is associated with qualitative, quantitative, and functional modifications of the peroxisome. These changes can be revealed by fluorescence microscopy (apotome, confocal microscopy), transmission electron microscopy, flow cytometry, quantitative reverse transcription polymerase chain reaction (RT-qPCR), and gas chromatography-coupled with mass spectrometry (GC-MS). Noteworthy, several natural molecules, including ω3 fatty acids, polyphenols, and α-tocopherol, as well as several Mediterranean oils [argan and olive oils, Milk-thistle (Sylibum marianum) and Pistacia lenticus seed oils], have cytoprotective properties and attenuate 7-ketocholesterol- and 7β-hydroxycholesterol-induced peroxisomal modifications. These observations led to the concept of pexotherapy.
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Affiliation(s)
- Imen Ghzaiel
- Bio-PeroxIL Laboratory, EA7270, University of Bourgogne & Inserm, Dijon, France
- Faculty of Medicine, Laboratory 'Nutrition, Functional Food and Vascular Health' (LR12ES05), University of Monastir, Monastir, Tunisia
| | - Samah Maaloul
- Laboratory of Rangeland Ecosystems and Valorization of Spontaneous Plants and Associated Microorganisms (LR16IRA03), Arid Regions Institute, University of Gabes, Medenine, Tunisia
| | - Mohamed Ksila
- Bio-PeroxIL Laboratory, EA7270, University of Bourgogne & Inserm, Dijon, France
- Laboratory of Neurophysiology, Cellular Physiopathology and Valorisation of Biomolecules (LR18ES03), Department of Biology, Faculty of Sciences, University Tunis El Manar, Tunis, Tunisia
| | - Amira Namsi
- Bio-PeroxIL Laboratory, EA7270, University of Bourgogne & Inserm, Dijon, France
| | - Aline Yammine
- Bio-PeroxIL Laboratory, EA7270, University of Bourgogne & Inserm, Dijon, France
| | - Meriam Debbabi
- Bio-PeroxIL Laboratory, EA7270, University of Bourgogne & Inserm, Dijon, France
| | - Asma Badreddine
- Bio-PeroxIL Laboratory, EA7270, University of Bourgogne & Inserm, Dijon, France
- Laboratory of Biochemistry, Neuroscience, Natural Resources and Environment, Faculty of Science and Technology, University Hassan I, Settat, Morocco
| | - Wiem Meddeb
- Bio-PeroxIL Laboratory, EA7270, University of Bourgogne & Inserm, Dijon, France
| | - Vivien Pires
- Bio-PeroxIL Laboratory, EA7270, University of Bourgogne & Inserm, Dijon, France
| | - Thomas Nury
- Bio-PeroxIL Laboratory, EA7270, University of Bourgogne & Inserm, Dijon, France
| | - Franck Ménétrier
- Centre des Sciences du Goût et de l'Alimentation, AgroSup Dijon, CNRS, INRAE, Université Bourgogne Franche-Comté, Dijon, France
| | - Laure Avoscan
- Agroécologie, AgroSup Dijon, CNRS, INRAE, University Bourgogne Franche-Comté, Plateforme DimaCell, Dijon, France
| | - Amira Zarrouk
- Faculty of Medicine, Laboratory 'Nutrition, Functional Food and Vascular Health' (LR12ES05), University of Monastir, Monastir, Tunisia
- Faculty of Medicine, University of Sousse, Laboratory of Biochemistry, Sousse, Tunisia
| | - Mauhamad Baarine
- Bio-PeroxIL Laboratory, EA7270, University of Bourgogne & Inserm, Dijon, France
| | - Olfa Masmoudi-Kouki
- Laboratory of Neurophysiology, Cellular Physiopathology and Valorisation of Biomolecules (LR18ES03), Department of Biology, Faculty of Sciences, University Tunis El Manar, Tunis, Tunisia
| | - Taoufik Ghrairi
- Laboratory of Neurophysiology, Cellular Physiopathology and Valorisation of Biomolecules (LR18ES03), Department of Biology, Faculty of Sciences, University Tunis El Manar, Tunis, Tunisia
| | - Raoudha Abdellaoui
- Laboratory of Rangeland Ecosystems and Valorization of Spontaneous Plants and Associated Microorganisms (LR16IRA03), Arid Regions Institute, University of Gabes, Medenine, Tunisia
| | - Boubker Nasser
- Laboratory of Biochemistry, Neuroscience, Natural Resources and Environment, Faculty of Science and Technology, University Hassan I, Settat, Morocco
| | - Sonia Hammami
- Faculty of Medicine, Laboratory 'Nutrition, Functional Food and Vascular Health' (LR12ES05), University of Monastir, Monastir, Tunisia
| | - Mohamed Hammami
- Faculty of Medicine, Laboratory 'Nutrition, Functional Food and Vascular Health' (LR12ES05), University of Monastir, Monastir, Tunisia
| | - Mohammad Samadi
- LCPMC-A2, ICPM, Department of Chemistry, University Lorraine, Metz Technopôle, Metz, France
| | - Anne Vejux
- Bio-PeroxIL Laboratory, EA7270, University of Bourgogne & Inserm, Dijon, France
| | - Gérard Lizard
- Bio-PeroxIL Laboratory, EA7270, University of Bourgogne & Inserm, Dijon, France.
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Raas Q, Tawbeh A, Tahri-Joutey M, Gondcaille C, Keime C, Kaiser R, Trompier D, Nasser B, Leoni V, Bellanger E, Boussand M, Hamon Y, Benani A, Di Cara F, Truntzer C, Cherkaoui-Malki M, Andreoletti P, Savary S. Peroxisomal defects in microglial cells induce a disease-associated microglial signature. Front Mol Neurosci 2023; 16:1170313. [PMID: 37138705 PMCID: PMC10149961 DOI: 10.3389/fnmol.2023.1170313] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 03/27/2023] [Indexed: 05/05/2023] Open
Abstract
Microglial cells ensure essential roles in brain homeostasis. In pathological condition, microglia adopt a common signature, called disease-associated microglial (DAM) signature, characterized by the loss of homeostatic genes and the induction of disease-associated genes. In X-linked adrenoleukodystrophy (X-ALD), the most common peroxisomal disease, microglial defect has been shown to precede myelin degradation and may actively contribute to the neurodegenerative process. We previously established BV-2 microglial cell models bearing mutations in peroxisomal genes that recapitulate some of the hallmarks of the peroxisomal β-oxidation defects such as very long-chain fatty acid (VLCFA) accumulation. In these cell lines, we used RNA-sequencing and identified large-scale reprogramming for genes involved in lipid metabolism, immune response, cell signaling, lysosome and autophagy, as well as a DAM-like signature. We highlighted cholesterol accumulation in plasma membranes and observed autophagy patterns in the cell mutants. We confirmed the upregulation or downregulation at the protein level for a few selected genes that mostly corroborated our observations and clearly demonstrated increased expression and secretion of DAM proteins in the BV-2 mutant cells. In conclusion, the peroxisomal defects in microglial cells not only impact on VLCFA metabolism but also force microglial cells to adopt a pathological phenotype likely representing a key contributor to the pathogenesis of peroxisomal disorders.
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Affiliation(s)
- Quentin Raas
- Laboratoire Bio-PeroxIL EA7270, University of Bourgogne, Dijon, France
| | - Ali Tawbeh
- Laboratoire Bio-PeroxIL EA7270, University of Bourgogne, Dijon, France
| | - Mounia Tahri-Joutey
- Laboratoire Bio-PeroxIL EA7270, University of Bourgogne, Dijon, France
- Laboratory of Biochemistry, Neurosciences, Natural Resources and Environment, Faculty of Sciences and Techniques, University Hassan I, Settat, Morocco
| | | | - Céline Keime
- Plateforme GenomEast, IGBMC, CNRS UMR 7104, Inserm U1258, University of Strasbourg, Illkirch, France
| | - Romain Kaiser
- Plateforme GenomEast, IGBMC, CNRS UMR 7104, Inserm U1258, University of Strasbourg, Illkirch, France
| | - Doriane Trompier
- Laboratoire Bio-PeroxIL EA7270, University of Bourgogne, Dijon, France
| | - Boubker Nasser
- Laboratory of Biochemistry, Neurosciences, Natural Resources and Environment, Faculty of Sciences and Techniques, University Hassan I, Settat, Morocco
| | - Valerio Leoni
- Laboratory of Clinical Biochemistry, Hospital of Desio, ASST-Brianza and Department of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | - Emma Bellanger
- Aix Marseille Univ, CNRS, INSERM, CIML, Marseille, France
| | - Maud Boussand
- Aix Marseille Univ, CNRS, INSERM, CIML, Marseille, France
| | - Yannick Hamon
- Aix Marseille Univ, CNRS, INSERM, CIML, Marseille, France
| | - Alexandre Benani
- Centre des Sciences du Goût et de l’Alimentation, CNRS, INRAE, Institut Agro Dijon, University of Bourgogne Franche-Comté, Dijon, France
| | - Francesca Di Cara
- Department of Microbiology and Immunology, IWK Health Centre, Dalhousie University, Halifax, NS, Canada
| | - Caroline Truntzer
- Platform of Transfer in Biological Oncology, Georges François Leclerc Cancer Center–Unicancer, Dijon, France
| | | | | | - Stéphane Savary
- Laboratoire Bio-PeroxIL EA7270, University of Bourgogne, Dijon, France
- *Correspondence: Stéphane Savary,
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Yifrach E, Holbrook-Smith D, Bürgi J, Othman A, Eisenstein M, van Roermund CW, Visser W, Tirosh A, Rudowitz M, Bibi C, Galor S, Weill U, Fadel A, Peleg Y, Erdmann R, Waterham HR, Wanders RJA, Wilmanns M, Zamboni N, Schuldiner M, Zalckvar E. Systematic multi-level analysis of an organelle proteome reveals new peroxisomal functions. Mol Syst Biol 2022; 18:e11186. [PMID: 36164978 PMCID: PMC9513677 DOI: 10.15252/msb.202211186] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/29/2022] [Accepted: 09/05/2022] [Indexed: 11/18/2022] Open
Abstract
Seventy years following the discovery of peroxisomes, their complete proteome, the peroxi‐ome, remains undefined. Uncovering the peroxi‐ome is crucial for understanding peroxisomal activities and cellular metabolism. We used high‐content microscopy to uncover peroxisomal proteins in the model eukaryote – Saccharomyces cerevisiae. This strategy enabled us to expand the known peroxi‐ome by ~40% and paved the way for performing systematic, whole‐organellar proteome assays. By characterizing the sub‐organellar localization and protein targeting dependencies into the organelle, we unveiled non‐canonical targeting routes. Metabolomic analysis of the peroxi‐ome revealed the role of several newly identified resident enzymes. Importantly, we found a regulatory role of peroxisomes during gluconeogenesis, which is fundamental for understanding cellular metabolism. With the current recognition that peroxisomes play a crucial part in organismal physiology, our approach lays the foundation for deep characterization of peroxisome function in health and disease.
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Affiliation(s)
- Eden Yifrach
- Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot, Israel
| | | | - Jérôme Bürgi
- Hamburg Unit c/o DESY, European Molecular Biology Laboratory (EMBL), Hamburg, Germany
| | - Alaa Othman
- Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland
| | - Miriam Eisenstein
- Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot, Israel
| | - Carlo Wt van Roermund
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry, Amsterdam Gastroenterology, Endocrinology & Metabolism, Amsterdam University Medical Centers - Location AMC, Amsterdam, The Netherlands
| | - Wouter Visser
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry, Amsterdam Gastroenterology, Endocrinology & Metabolism, Amsterdam University Medical Centers - Location AMC, Amsterdam, The Netherlands
| | - Asa Tirosh
- Life Sciences Core Facilities (LSCF), The Weizmann Institute of Science, Rehovot, Israel
| | - Markus Rudowitz
- Department of Systems Biochemistry, Institute of Biochemistry and Pathobiochemistry, Ruhr-University Bochum, Bochum, Germany
| | - Chen Bibi
- Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot, Israel
| | - Shahar Galor
- Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot, Israel
| | - Uri Weill
- Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot, Israel
| | - Amir Fadel
- Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot, Israel
| | - Yoav Peleg
- Life Sciences Core Facilities (LSCF), The Weizmann Institute of Science, Rehovot, Israel
| | - Ralf Erdmann
- Department of Systems Biochemistry, Institute of Biochemistry and Pathobiochemistry, Ruhr-University Bochum, Bochum, Germany
| | - Hans R Waterham
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry, Amsterdam Gastroenterology, Endocrinology & Metabolism, Amsterdam University Medical Centers - Location AMC, Amsterdam, The Netherlands
| | - Ronald J A Wanders
- Laboratory Genetic Metabolic Diseases, Department of Clinical Chemistry, Amsterdam Gastroenterology, Endocrinology & Metabolism, Amsterdam University Medical Centers - Location AMC, Amsterdam, The Netherlands
| | - Matthias Wilmanns
- Hamburg Unit c/o DESY, European Molecular Biology Laboratory (EMBL), Hamburg, Germany.,University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Nicola Zamboni
- Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland
| | - Maya Schuldiner
- Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot, Israel
| | - Einat Zalckvar
- Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot, Israel
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Ghzaiel I, Zarrouk A, Essadek S, Martine L, Hammouda S, Yammine A, Ksila M, Nury T, Meddeb W, Tahri Joutey M, Mihoubi W, Caccia C, Leoni V, Samadi M, Acar N, Andreoletti P, Hammami S, Ghrairi T, Vejux A, Hammami M, Lizard G. Protective effects of milk thistle (Sylibum marianum) seed oil and α-tocopherol against 7β-hydroxycholesterol-induced peroxisomal alterations in murine C2C12 myoblasts: Nutritional insights associated with the concept of pexotherapy. Steroids 2022; 183:109032. [PMID: 35381271 DOI: 10.1016/j.steroids.2022.109032] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 03/15/2022] [Accepted: 03/31/2022] [Indexed: 12/11/2022]
Abstract
Peroxisomes play an important role in regulating cell metabolism and RedOx homeostasis. Peroxisomal dysfunctions favor oxidative stress and cell death. The ability of 7β-hydroxycholesterol (7β-OHC; 50 μM, 24 h), known to be increased in patients with age-related diseases such as sarcopenia, to trigger oxidative stress, mitochondrial and peroxisomal dysfunction was studied in murine C2C12 myoblasts. The capacity of milk thistle seed oil (MTSO, 100 μg/mL) as well as α-tocopherol (400 µM; reference cytoprotective agent) to counteract the toxic effects of 7β-OHC, mainly at the peroxisomal level were evaluated. The impacts of 7β-OHC, in the presence or absence of MTSO or α-tocopherol, were studied with complementary methods: measurement of cell density and viability, quantification of reactive oxygen species (ROS) production and transmembrane mitochondrial potential (ΔΨm), evaluation of peroxisomal mass as well as topographic, morphologic and functional peroxisomal changes. Our results indicate that 7β-OHC induces a loss of cell viability and a decrease of cell adhesion associated with ROS overproduction, alterations of mitochondrial ultrastructure, a drop of ΔΨm, and several peroxisomal modifications. In the presence of 7β-OHC, comparatively to untreated cells, important quantitative and qualitative peroxisomal modifications were also identified: a) a reduced number of peroxisomes with abnormal sizes and shapes, mainly localized in cytoplasmic vacuoles, were observed; b) the peroxisomal mass was decreased as indicated by lower protein and mRNA levels of the peroxisomal ABCD3 transporter; c) lower mRNA level of Pex5 involved in peroxisomal biogenesis as well as higher mRNA levels of Pex13 and Pex14, involved in peroxisomal biogenesis and/or pexophagy, was found; d) lower levels of ACOX1 and MFP2 enzymes, implicated in peroxisomal β-oxidation, were detected; e) higher levels of very-long-chain fatty acids, which are substrates of peroxisomal β-oxidation, were found. These different cytotoxic effects were strongly attenuated by MTSO, in the same range of order as with α-tocopherol. These findings underline the interest of MTSO and α-tocopherol in the prevention of peroxisomal damages (pexotherapy).
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Affiliation(s)
- Imen Ghzaiel
- Team 'Biochemistry of the Peroxisome, Inflammation and Lipid Metabolism'EA7270/Inserm, University Bourgogne Franche-Comté, 21000 Dijon, France; Lab-NAFS 'Nutrition-Functional Food & Vascular Health', Faculty of Medicine, University of Monastir, LR12ES05, 5000 Monastir, Tunisia; Faculty of Sciences of Tunis, University Tunis-El Manar, 2092 Tunis, Tunisia
| | - Amira Zarrouk
- Lab-NAFS 'Nutrition-Functional Food & Vascular Health', Faculty of Medicine, University of Monastir, LR12ES05, 5000 Monastir, Tunisia; Faculty of Medicine, University of Sousse, 4000 Sousse, Tunisia.
| | - Soukaina Essadek
- Team 'Biochemistry of the Peroxisome, Inflammation and Lipid Metabolism'EA7270/Inserm, University Bourgogne Franche-Comté, 21000 Dijon, France; Laboratory of Biochemistry, Neurosciences, Natural Resources and Environment, Faculty of Sciences & Techniques, University Hassan I, BP 577, 26000 Settat, Morocco
| | - Lucy Martine
- Centre des Sciences du Goût et de l'Alimentation, AgroSup Dijon, CNRS, INRAE, Université Bourgogne Franche-Comté, 21065 Dijon, France
| | - Souha Hammouda
- Lab-NAFS 'Nutrition-Functional Food & Vascular Health', Faculty of Medicine, University of Monastir, LR12ES05, 5000 Monastir, Tunisia
| | - Aline Yammine
- Team 'Biochemistry of the Peroxisome, Inflammation and Lipid Metabolism'EA7270/Inserm, University Bourgogne Franche-Comté, 21000 Dijon, France; Bioactive Molecules Research Laboratory, Doctoral School of Sciences and Technologies, Faculty of Sciences, Lebanese University, Fanar, Jdeidet P.O. Box 90656, Lebanon
| | - Mohamed Ksila
- Team 'Biochemistry of the Peroxisome, Inflammation and Lipid Metabolism'EA7270/Inserm, University Bourgogne Franche-Comté, 21000 Dijon, France; Faculty of Sciences of Tunis, University Tunis-El Manar, 2092 Tunis, Tunisia
| | - Thomas Nury
- Team 'Biochemistry of the Peroxisome, Inflammation and Lipid Metabolism'EA7270/Inserm, University Bourgogne Franche-Comté, 21000 Dijon, France
| | - Wiem Meddeb
- Team 'Biochemistry of the Peroxisome, Inflammation and Lipid Metabolism'EA7270/Inserm, University Bourgogne Franche-Comté, 21000 Dijon, France
| | - Mounia Tahri Joutey
- Team 'Biochemistry of the Peroxisome, Inflammation and Lipid Metabolism'EA7270/Inserm, University Bourgogne Franche-Comté, 21000 Dijon, France; Laboratory of Biochemistry, Neurosciences, Natural Resources and Environment, Faculty of Sciences & Techniques, University Hassan I, BP 577, 26000 Settat, Morocco
| | - Wafa Mihoubi
- Laboratoire de Biotechnologie Moléculaire des Eucaryotes, Centre de Biotechnologie de Sfax, B.P 1177, Université de Sfax, 3018 Sfax, Tunisia
| | - Claudio Caccia
- Laboratory of Clinical Chemistry, Hospitals of Desio, ASST-Brianza and Department of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy
| | - Valerio Leoni
- Laboratory of Clinical Chemistry, Hospitals of Desio, ASST-Brianza and Department of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy
| | - Mohammad Samadi
- LCPMC-A2, ICPM, Department of Chemistry, University Lorraine, Metz Technopôle, 57070 Metz, France
| | - Niyazi Acar
- Centre des Sciences du Goût et de l'Alimentation, AgroSup Dijon, CNRS, INRAE, Université Bourgogne Franche-Comté, 21065 Dijon, France
| | - Pierre Andreoletti
- Team 'Biochemistry of the Peroxisome, Inflammation and Lipid Metabolism'EA7270/Inserm, University Bourgogne Franche-Comté, 21000 Dijon, France
| | - Sonia Hammami
- Lab-NAFS 'Nutrition-Functional Food & Vascular Health', Faculty of Medicine, University of Monastir, LR12ES05, 5000 Monastir, Tunisia
| | - Taoufik Ghrairi
- Faculty of Sciences of Tunis, University Tunis-El Manar, 2092 Tunis, Tunisia
| | - Anne Vejux
- Team 'Biochemistry of the Peroxisome, Inflammation and Lipid Metabolism'EA7270/Inserm, University Bourgogne Franche-Comté, 21000 Dijon, France
| | - Mohamed Hammami
- Lab-NAFS 'Nutrition-Functional Food & Vascular Health', Faculty of Medicine, University of Monastir, LR12ES05, 5000 Monastir, Tunisia
| | - Gérard Lizard
- Team 'Biochemistry of the Peroxisome, Inflammation and Lipid Metabolism'EA7270/Inserm, University Bourgogne Franche-Comté, 21000 Dijon, France.
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5
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Lotz-Havla AS, Woidy M, Guder P, Schmiesing J, Erdmann R, Waterham HR, Muntau AC, Gersting SW. Edgetic Perturbations Contribute to Phenotypic Variability in PEX26 Deficiency. Front Genet 2021; 12:726174. [PMID: 34804114 PMCID: PMC8600046 DOI: 10.3389/fgene.2021.726174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 10/18/2021] [Indexed: 12/11/2022] Open
Abstract
Peroxisomes share metabolic pathways with other organelles and peroxisomes are embedded into key cellular processes. However, the specific function of many peroxisomal proteins remains unclear and restricted knowledge of the peroxisomal protein interaction network limits a precise mapping of this network into the cellular metabolism. Inborn peroxisomal disorders are autosomal or X-linked recessive diseases that affect peroxisomal biogenesis (PBD) and/or peroxisomal metabolism. Pathogenic variants in the PEX26 gene lead to peroxisomal disorders of the full Zellweger spectrum continuum. To investigate the phenotypic complexity of PEX26 deficiency, we performed a combined organelle protein interaction screen and network medicine approach and 1) analyzed whether PEX26 establishes interactions with other peroxisomal proteins, 2) deciphered the PEX26 interaction network, 3) determined how PEX26 is involved in further processes of peroxisomal biogenesis and metabolism, and 4) showed how variant-specific disruption of protein-protein interactions (edgetic perturbations) may contribute to phenotypic variability in PEX26 deficient patients. The discovery of 14 novel protein-protein interactions for PEX26 revealed a hub position of PEX26 inside the peroxisomal interactome. Analysis of edgetic perturbations of PEX26 variants revealed a strong correlation between the number of affected protein-protein interactions and the molecular phenotype of matrix protein import. The role of PEX26 in peroxisomal biogenesis was expanded encompassing matrix protein import, division and proliferation, and membrane assembly. Moreover, the PEX26 interaction network intersects with cellular lipid metabolism at different steps. The results of this study expand the knowledge about the function of PEX26 and refine genotype-phenotype correlations, which may contribute to our understanding of the underlying disease mechanism of PEX26 deficiency.
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Affiliation(s)
- Amelie S Lotz-Havla
- Dr. von Hauner Children's Hospital, Ludwig-Maximilians-University, Munich, Germany
| | - Mathias Woidy
- University Children's Research, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Philipp Guder
- University Children's Research, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jessica Schmiesing
- University Children's Research, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ralf Erdmann
- Institut für Physiologische Chemie, Medizinische Fakultät der Ruhr-Universität Bochum, Bochum, Germany
| | - Hans R Waterham
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Ania C Muntau
- Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Søren W Gersting
- University Children's Research, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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6
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Greiner T, Kipp M. What Guides Peripheral Immune Cells into the Central Nervous System? Cells 2021; 10:cells10082041. [PMID: 34440810 PMCID: PMC8392645 DOI: 10.3390/cells10082041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 11/16/2022] Open
Abstract
Multiple sclerosis (MS), an immune-mediated demyelinating disease of the central nervous system (CNS), initially presents with a relapsing-remitting disease course. During this early stage of the disease, leukocytes cross the blood–brain barrier to drive the formation of focal demyelinating plaques. Disease-modifying agents that modulate or suppress the peripheral immune system provide a therapeutic benefit during relapsing-remitting MS (RRMS). The majority of individuals with RRMS ultimately enter a secondary progressive disease stage with a progressive accumulation of neurologic deficits. The cellular and molecular basis for this transition is unclear and the role of inflammation during the secondary progressive disease stage is a subject of intense and controversial debate. In this review article, we discuss the following main hypothesis: during both disease stages, peripheral immune cells are triggered by CNS-intrinsic stimuli to invade the brain parenchyma. Furthermore, we outline the different neuroanatomical routes by which peripheral immune cells might migrate from the periphery into the CNS.
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