1
|
Eysert F, Kinoshita PF, Lagarde J, Lacas-Gervais S, Xicota L, Dorothée G, Bottlaender M, Checler F, Potier MC, Sarazin M, Chami M. Mitochondrial alterations in fibroblasts from sporadic Alzheimer's disease (AD) patients correlate with AD-related clinical hallmarks. Acta Neuropathol Commun 2024; 12:90. [PMID: 38851733 PMCID: PMC11161956 DOI: 10.1186/s40478-024-01807-x] [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: 05/23/2024] [Accepted: 05/27/2024] [Indexed: 06/10/2024] Open
Abstract
Mitochondrial dysfunctions are key features of Alzheimer's disease (AD). The occurrence of these disturbances in the peripheral cells of AD patients and their potential correlation with disease progression are underinvestigated. We studied mitochondrial structure, function and mitophagy in fibroblasts from healthy volunteers and AD patients at the prodromal (AD-MCI) or demented (AD-D) stages. We carried out correlation studies with clinical cognitive scores, namely, (i) Mini-Mental State Examination (MMSE) and (ii) Dementia Rating-Scale Sum of Boxes (CDR-SOB), and with (iii) amyloid beta (Aβ) plaque burden (PiB-PET imaging) and (iv) the accumulation of peripheral amyloid precursor protein C-terminal fragments (APP-CTFs). We revealed alterations in mitochondrial structure as well as specific mitochondrial dysfunction signatures in AD-MCI and AD-D fibroblasts and revealed that defective mitophagy and autophagy are linked to impaired lysosomal activity in AD-D fibroblasts. We reported significant correlations of a subset of these dysfunctions with cognitive decline, AD-related clinical hallmarks and peripheral APP-CTFs accumulation. This study emphasizes the potential use of peripheral cells for investigating AD pathophysiology.
Collapse
Affiliation(s)
- Fanny Eysert
- INSERM, CNRS, Institute of Molecular and Cellular Pharmacology, Laboratory of Excellence DistALZ, Université Côte d'Azur, 660 Route des Lucioles, 06560, Sophia-Antipolis, Valbonne, France
| | - Paula-Fernanda Kinoshita
- INSERM, CNRS, Institute of Molecular and Cellular Pharmacology, Laboratory of Excellence DistALZ, Université Côte d'Azur, 660 Route des Lucioles, 06560, Sophia-Antipolis, Valbonne, France
| | - Julien Lagarde
- Department of Neurology of Memory and Language, GHU Paris Psychiatrie & Neurosciences, Hôpital Sainte Anne, 75014, Paris, France
- Université Paris-Cité, 75006, Paris, France
- BioMaps, Service Hospitalier Frédéric Joliot CEA, CNRS, Inserm, Université Paris-Saclay, 91401, Orsay, France
| | - Sandra Lacas-Gervais
- Centre Commun de Microscopie Appliquée, Université de Nice Côte d'Azur, 06108, Nice, France
| | - Laura Xicota
- UPMC University Paris 06, UMRS 1127, Sorbonne Universités, Paris, France
- ICM Research Center, CNRS UMR 7225, Paris, France
| | - Guillaume Dorothée
- Inserm, Centre de Recherche Saint-Antoine, CRSA, Immune System and Neuroinflammation Laboratory, Hôpital Saint-Antoine, Sorbonne Université, 75012, Paris, France
| | - Michel Bottlaender
- BioMaps, Service Hospitalier Frédéric Joliot CEA, CNRS, Inserm, Université Paris-Saclay, 91401, Orsay, France
- UNIACT, Neurospin, Joliot Institute, CEA, Université Paris-Saclay, 91140, Gif sur Yvette, France
| | - Frédéric Checler
- INSERM, CNRS, Institute of Molecular and Cellular Pharmacology, Laboratory of Excellence DistALZ, Université Côte d'Azur, 660 Route des Lucioles, 06560, Sophia-Antipolis, Valbonne, France
| | - Marie-Claude Potier
- UPMC University Paris 06, UMRS 1127, Sorbonne Universités, Paris, France
- ICM Research Center, CNRS UMR 7225, Paris, France
| | - Marie Sarazin
- Department of Neurology of Memory and Language, GHU Paris Psychiatrie & Neurosciences, Hôpital Sainte Anne, 75014, Paris, France
- Université Paris-Cité, 75006, Paris, France
- BioMaps, Service Hospitalier Frédéric Joliot CEA, CNRS, Inserm, Université Paris-Saclay, 91401, Orsay, France
| | - Mounia Chami
- INSERM, CNRS, Institute of Molecular and Cellular Pharmacology, Laboratory of Excellence DistALZ, Université Côte d'Azur, 660 Route des Lucioles, 06560, Sophia-Antipolis, Valbonne, France.
| |
Collapse
|
2
|
Firdaus Z, Li X. Unraveling the Genetic Landscape of Neurological Disorders: Insights into Pathogenesis, Techniques for Variant Identification, and Therapeutic Approaches. Int J Mol Sci 2024; 25:2320. [PMID: 38396996 PMCID: PMC10889342 DOI: 10.3390/ijms25042320] [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: 01/18/2024] [Revised: 02/09/2024] [Accepted: 02/13/2024] [Indexed: 02/25/2024] Open
Abstract
Genetic abnormalities play a crucial role in the development of neurodegenerative disorders (NDDs). Genetic exploration has indeed contributed to unraveling the molecular complexities responsible for the etiology and progression of various NDDs. The intricate nature of rare and common variants in NDDs contributes to a limited understanding of the genetic risk factors associated with them. Advancements in next-generation sequencing have made whole-genome sequencing and whole-exome sequencing possible, allowing the identification of rare variants with substantial effects, and improving the understanding of both Mendelian and complex neurological conditions. The resurgence of gene therapy holds the promise of targeting the etiology of diseases and ensuring a sustained correction. This approach is particularly enticing for neurodegenerative diseases, where traditional pharmacological methods have fallen short. In the context of our exploration of the genetic epidemiology of the three most prevalent NDDs-amyotrophic lateral sclerosis, Alzheimer's disease, and Parkinson's disease, our primary goal is to underscore the progress made in the development of next-generation sequencing. This progress aims to enhance our understanding of the disease mechanisms and explore gene-based therapies for NDDs. Throughout this review, we focus on genetic variations, methodologies for their identification, the associated pathophysiology, and the promising potential of gene therapy. Ultimately, our objective is to provide a comprehensive and forward-looking perspective on the emerging research arena of NDDs.
Collapse
Affiliation(s)
- Zeba Firdaus
- Department of Internal Medicine, Mayo Clinic, Rochester, MN 55905, USA;
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55905, USA
| | - Xiaogang Li
- Department of Internal Medicine, Mayo Clinic, Rochester, MN 55905, USA;
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55905, USA
| |
Collapse
|
3
|
Rose SE, Williams CA, Hailey DW, Mishra S, Kirkland A, Keene CD, Garden GA, Jayadev S, Young JE. Advancements in high-resolution 3D microscopy analysis of endosomal morphology in postmortem Alzheimer's disease brains. Front Neurosci 2024; 17:1321680. [PMID: 38292900 PMCID: PMC10824887 DOI: 10.3389/fnins.2023.1321680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Accepted: 12/27/2023] [Indexed: 02/01/2024] Open
Abstract
Abnormal endo-lysosomal morphology is an early cytopathological feature of Alzheimer's disease (AD) and genome-wide association studies (GWAS) have implicated genes involved in the endo-lysosomal network (ELN) as conferring increased risk for developing sporadic, late-onset AD (LOAD). Characterization of ELN pathology and the underlying pathophysiology is a promising area of translational AD research and drug development. However, rigorous study of ELN vesicles in AD and aged control brains poses a unique constellation of methodological challenges due in part to the small size of these structures and subsequent requirements for high-resolution imaging. Here we provide a detailed protocol for high-resolution 3D morphological quantification of neuronal endosomes in postmortem AD brain tissue, using immunofluorescent staining, confocal imaging with image deconvolution, and Imaris software analysis pipelines. To demonstrate these methods, we present neuronal endosome morphology data from 23 sporadic LOAD donors and one aged non-AD control donor. The techniques described here were developed across a range of AD neuropathology to best optimize these methods for future studies with large cohorts. Application of these methods in research cohorts will help advance understanding of ELN dysfunction and cytopathology in sporadic AD.
Collapse
Affiliation(s)
- Shannon E. Rose
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA,United States
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States
| | - C. Andrew Williams
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA,United States
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States
| | - Dale W. Hailey
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States
| | - Swati Mishra
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA,United States
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States
| | - Amanda Kirkland
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA,United States
| | - C. Dirk Keene
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA,United States
| | - Gwenn A. Garden
- Department of Neurology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Suman Jayadev
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States
- Department of Neurology, University of Washington, Seattle, WA, United States
| | - Jessica E. Young
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA,United States
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States
| |
Collapse
|