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Zhan L, Huang Y, Wang G. Multi-modal mass spectrometry imaging of a single tissue section. JOURNAL OF MASS SPECTROMETRY : JMS 2024; 59:e5074. [PMID: 39017393 DOI: 10.1002/jms.5074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 06/10/2024] [Accepted: 06/21/2024] [Indexed: 07/18/2024]
Abstract
Mass spectrometry imaging (MSI) was developed to visualize spatial chemical information within tissues, thereby facilitating spatial multi-omic analysis. However, due to the limited spatial information provided by individual modal MSI, correlating various chemical data within tissues remains a significant challenge. In recent years, multimodal MSI has garnered considerable attention due to its ability to visualize the spatial distributions of multiple biomolecules within tissues. Among the strategies employed in this field, multimodal imaging on a single tissue section circumvents multiple issues introduced by integration of images of consecutive tissue sections. In this minireview, we provide an overview of multimodal MSI on a single tissue section, with a particular focus on the use of Matrix-Assisted Laser Desorption/Ionization-MSI for spatial multi-omic investigations that offer a comprehensive and in-depth elucidation of the biological state and activities, aiming to inspire the development of new approaches in this field.
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Affiliation(s)
- Lingpeng Zhan
- Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen, China
| | - Yanyi Huang
- Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen, China
- Biomedical Pioneering Innovation Center, Peking University, Beijing, China
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Guanbo Wang
- Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen, China
- Biomedical Pioneering Innovation Center, Peking University, Beijing, China
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2
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Hanrieder J. Lipid imaging of Alzheimer's disease pathology. J Neurochem 2024; 168:1175-1178. [PMID: 38372595 DOI: 10.1111/jnc.16079] [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: 01/19/2024] [Revised: 01/30/2024] [Accepted: 01/31/2024] [Indexed: 02/20/2024]
Abstract
Alzheimer's disease (AD) affects one in eight individuals over 65 and poses an immense societal challenge. AD pathology is characterized by the formation of beta-amyloid plaques and Tau tangles in the brain. While some disease-modifying treatments targeting beta-amyloid are emerging, the exact chain of events underlying the pathogenesis of this disease remains unclear. Brain lipids have long been implicated in AD pathology, though their role in AD pathogenesis remains not fully resolved. Significant advancements in mass spectrometry imaging (MSI) allow to detail spatial lipid regulations in biological tissues at the low um scale. In this issue, Huang et al. resolve spatial lipid patterns in human AD brain and genetic mouse models using desorption electrospray ionization (DESI)-based MSI integrated with other spatial techniques such as imaging mass cytometry of correlative protein signatures. Those spatial multiomics experiments identify plaque-associated lipid regulations that are dependent on progressing plaque pathology in both mouse models and the human brain. Of those lipid species, particularly pro-inflammatory lysophospholipids have been implicated in AD pathology through their interaction with both aggregating Aβ and microglial activation through lipid sensing surface receptors. Together, this study provides further insight into how brain lipid homeostasis is linked to progressing AD pathology, and thereby highlights the potential of MSI-based spatial lipidomics as an emerging spatial biology technology for biomedical research.
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Affiliation(s)
- Jörg Hanrieder
- Department of Psychiatry and Neurochemistry, Sahlgrenska Academy, University of Gothenburg, Mölndal, Sweden
- Science for Life Laboratory (SciLife), University of Gothenburg, Gothenburg, Sweden
- Department of Neurodegenerative Disease, Queen Square Institute of Neurology, University College London, London, UK
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3
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Ollen-Bittle N, Pejhan S, Pasternak SH, Keene CD, Zhang Q, Whitehead SN. Co-registration of MALDI-MSI and histology demonstrates gangliosides co-localize with amyloid beta plaques in Alzheimer's disease. Acta Neuropathol 2024; 147:105. [PMID: 38896306 DOI: 10.1007/s00401-024-02759-1] [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: 02/27/2024] [Revised: 06/12/2024] [Accepted: 06/13/2024] [Indexed: 06/21/2024]
Abstract
Alzheimer's disease (AD) is a progressive neurological condition characterized by impaired cognitive function and behavioral alterations. While AD research historically centered around mis-folded proteins, advances in mass spectrometry techniques have triggered increased exploration of the AD lipidome with lipid dysregulation emerging as a critical player in AD pathogenesis. Gangliosides are a class of glycosphingolipids enriched within the central nervous system. Previous work has suggested a shift in a-series gangliosides from complex (GM1) to simple (GM2 and GM3) species may be related to the development of neurodegenerative disease. In addition, complex gangliosides with 20 carbon sphingosine chains have been shown to increase in the aging brain. In this study, we utilized matrix-assisted laser desorption ionization mass spectrometry imaging (MALDI-MSI) to interrogate the in situ relationship of a-series gangliosides with either 18 or 20 carbon sphingosine chains (d18:1 or d20:1, respectively) in the post-mortem human AD brain. Here, we expanded upon previous literature and demonstrated a significant decrease in the GM1 d20:1 to GM1 d18:1 ratio in regions of the dentate gyrus and entorhinal cortex in AD relative to control brain tissue. Then, we demonstrated that the MALDI-MSI profile of GM3 co-localizes with histologically confirmed amyloid beta (Aβ) plaques and found a significant increase in both GM1 and GM3 in proximity to Aβ plaques. Collectively, this study demonstrates a perturbation of the ganglioside profile in AD, and validates a pipeline for MALDI-MSI and classic histological staining in the same tissue sections. This demonstrates feasibility for integrating untargeted mass spectrometry imaging approaches into a digital pathology framework.
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Affiliation(s)
- Nikita Ollen-Bittle
- Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, Western University, London, ON, N6A 5C1, Canada
| | - Shervin Pejhan
- Department of Pathology and Laboratory Medicine, London Health Sciences Centre, London, ON, Canada
| | - Stephen H Pasternak
- Schulich School of Medicine and Dentistry, Robarts Research Institute, London, ON, Canada
- Department of Clinical Neurological Sciences, Schulich School of Medicine and Dentistry, Western University, London, ON, N6A 5C1, Canada
| | - C Dirk Keene
- Department of Laboratory Medicine and Pathology, Division of Neuropathology, University of Washington School of Medicine, Seattle, WA, USA
| | - Qi Zhang
- Department of Pathology and Laboratory Medicine, London Health Sciences Centre, London, ON, Canada
| | - Shawn N Whitehead
- Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, Western University, London, ON, N6A 5C1, Canada.
- Department of Anatomy and Cell Biology, 454 Medical Sciences Building, The University of Western Ontario, London, ON, N6A 3K7, Canada.
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4
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Yu B, Zhan R, Hu Y, Lv Z. Mass Spectrometry Imaging: An Emerging Technology in Medical Parasitology. Anal Chem 2024; 96:8011-8020. [PMID: 38579105 DOI: 10.1021/acs.analchem.3c05341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2024]
Affiliation(s)
- Bingcheng Yu
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou, Guangdong 510080, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong 511493, China
| | - Rongjian Zhan
- Department of Otolaryngology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China
| | - Yue Hu
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou, Guangdong 510080, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong 511493, China
| | - Zhiyue Lv
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou, Guangdong 510080, China
- Provincial Engineering Technology Research Center for Biological Vector Control, Guangzhou, Guangdong 511493, China
- Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University Haikou, Haikou, Hainan 571199, China
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5
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Calvo I, Montilla A, Huergo C, Martín-Saiz L, Martín-Allende J, Tepavcevic V, Domercq M, Fernández JA. Combining imaging mass spectrometry and immunohistochemistry to analyse the lipidome of spinal cord inflammation. Anal Bioanal Chem 2024; 416:1923-1933. [PMID: 38326664 PMCID: PMC10902057 DOI: 10.1007/s00216-024-05190-3] [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: 11/22/2023] [Revised: 01/10/2024] [Accepted: 01/29/2024] [Indexed: 02/09/2024]
Abstract
Inflammation is a complex process that accompanies many pathologies. Actually, dysregulation of the inflammatory process is behind many autoimmune diseases. Thus, treatment of such pathologies may benefit from in-depth knowledge of the metabolic changes associated with inflammation. Here, we developed a strategy to characterize the lipid fingerprint of inflammation in a mouse model of spinal cord injury. Using lipid imaging mass spectrometry (LIMS), we scanned spinal cord sections from nine animals injected with lysophosphatidylcholine, a chemical model of demyelination. The lesions were demonstrated to be highly heterogeneous, and therefore, comparison with immunofluorescence experiments carried out in the same section scanned by LIMS was required to accurately identify the morphology of the lesion. Following this protocol, three main areas were defined: the lesion core, the peri-lesion, which is the front of the lesion and is rich in infiltrating cells, and the uninvolved tissue. Segmentation of the LIMS experiments allowed us to isolate the lipid fingerprint of each area in a precise way, as demonstrated by the analysis using classification models. A clear difference in lipid signature was observed between the lesion front and the epicentre, where the damage was maximized. This study is a first step to unravel the changes in the lipidome associated with inflammation in the context of diverse pathologies, such as multiple sclerosis.
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Affiliation(s)
- Ibai Calvo
- Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Bº Sarriena s/n, 48940, Leioa, Spain
| | - Alejandro Montilla
- Achucarro Basque Center for Neurosciencie, Bº Sarriena s/n, 48940, Leioa, Spain
- Department Neuroscience, Faculty of Medicine, University of the Basque Country (UPV/EHU), Bº Sarriena s/n, 48940, Leioa, Spain
| | - Cristina Huergo
- Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Bº Sarriena s/n, 48940, Leioa, Spain
| | - Lucía Martín-Saiz
- Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Bº Sarriena s/n, 48940, Leioa, Spain
| | - Javier Martín-Allende
- Department of Languages and Computer Systems, School of Engineering, University of the Basque Country (UPV/EHU), Paseo Rafael Moreno "Pitxitxi", n. 2/3, 48013, Bilbao, Spain
| | - Vanja Tepavcevic
- Achucarro Basque Center for Neurosciencie, Bº Sarriena s/n, 48940, Leioa, Spain
| | - María Domercq
- Achucarro Basque Center for Neurosciencie, Bº Sarriena s/n, 48940, Leioa, Spain.
- Department Neuroscience, Faculty of Medicine, University of the Basque Country (UPV/EHU), Bº Sarriena s/n, 48940, Leioa, Spain.
| | - José A Fernández
- Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Bº Sarriena s/n, 48940, Leioa, Spain.
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Jha D, Blennow K, Zetterberg H, Savas JN, Hanrieder J. Spatial neurolipidomics-MALDI mass spectrometry imaging of lipids in brain pathologies. JOURNAL OF MASS SPECTROMETRY : JMS 2024; 59:e5008. [PMID: 38445816 DOI: 10.1002/jms.5008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/03/2024] [Accepted: 01/25/2024] [Indexed: 03/07/2024]
Abstract
Given the complexity of nervous tissues, understanding neurochemical pathophysiology puts high demands on bioanalytical techniques with respect to specificity and sensitivity. Mass spectrometry imaging (MSI) has evolved to become an important, biochemical imaging technology for spatial biology in biological and translational research. The technique facilitates comprehensive, sensitive elucidation of the spatial distribution patterns of drugs, lipids, peptides, and small proteins in situ. Matrix-assisted laser desorption ionization (MALDI)-based MSI is the dominating modality due to its broad applicability and fair compromise of selectivity, sensitivity price, throughput, and ease of use. This is particularly relevant for the analysis of spatial lipid patterns, where no other comparable spatial profiling tools are available. Understanding spatial lipid biology in nervous tissue is therefore a key and emerging application area of MSI research. The aim of this review is to give a concise guide through the MSI workflow for lipid imaging in central nervous system (CNS) tissues and essential parameters to consider while developing and optimizing MSI assays. Further, this review provides a broad overview of key developments and applications of MALDI MSI-based spatial neurolipidomics to map lipid dynamics in neuronal structures, ultimately contributing to a better understanding of neurodegenerative disease pathology.
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Affiliation(s)
- Durga Jha
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Mölndal Hospital, Mölndal, Sweden
| | - Kaj Blennow
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Mölndal Hospital, Mölndal, Sweden
- Clinical Neurochemistry Lab, Sahlgrenska University Hospital, Mölndal, Sweden
- Paris Brain Institute, ICM, Pitié-Salpêtrière Hospital, Sorbonne University, Paris, France
- Neurodegenerative Disorder Research Center, Division of Life Sciences and Medicine, Department of Neurology, Institute on Aging and Brain Disorders, University of Science and Technology of China and First Affiliated Hospital of USTC, Hefei, China
| | - Henrik Zetterberg
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Mölndal Hospital, Mölndal, Sweden
- Clinical Neurochemistry Lab, Sahlgrenska University Hospital, Mölndal, Sweden
- UK Dementia Research Institute at UCL, London, UK
- Department of Neurodegenerative Disease, Queen Square Institute of Neurology, University College London, London, UK
- Hong Kong Center for Neurodegenerative Diseases, Clear Water Bay, Hong Kong, China
- Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Jeffrey N Savas
- Department of Neurology, Northwestern University Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Jörg Hanrieder
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Mölndal Hospital, Mölndal, Sweden
- Clinical Neurochemistry Lab, Sahlgrenska University Hospital, Mölndal, Sweden
- Department of Neurodegenerative Disease, Queen Square Institute of Neurology, University College London, London, UK
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Michno W, Bowman A, Jha D, Minta K, Ge J, Koutarapu S, Zetterberg H, Blennow K, Lashley T, Heeren RMA, Hanrieder J. Spatial Neurolipidomics at the Single Amyloid-β Plaque Level in Postmortem Human Alzheimer's Disease Brain. ACS Chem Neurosci 2024; 15:877-888. [PMID: 38299453 PMCID: PMC10885149 DOI: 10.1021/acschemneuro.4c00006] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 01/08/2024] [Accepted: 01/09/2024] [Indexed: 02/02/2024] Open
Abstract
Lipid dysregulations have been critically implicated in Alzheimer's disease (AD) pathology. Chemical analysis of amyloid-β (Aβ) plaque pathology in transgenic AD mouse models has demonstrated alterations in the microenvironment in the direct proximity of Aβ plaque pathology. In mouse studies, differences in lipid patterns linked to structural polymorphism among Aβ pathology, such as diffuse, immature, and mature fibrillary aggregates, have also been reported. To date, no comprehensive analysis of neuronal lipid microenvironment changes in human AD tissue has been performed. Here, for the first time, we leverage matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) through a high-speed and spatial resolution commercial time-of-light instrument, as well as a high-mass-resolution in-house-developed orbitrap system to characterize the lipid microenvironment in postmortem human brain tissue from AD patients carrying Presenilin 1 mutations (PSEN1) that lead to familial forms of AD (fAD). Interrogation of the spatially resolved MSI data on a single Aβ plaque allowed us to verify nearly 40 sphingolipid and phospholipid species from diverse subclasses being enriched and depleted, in relation to the Aβ deposits. This included monosialo-gangliosides (GM), ceramide monohexosides (HexCer), ceramide-1-phosphates (CerP), ceramide phosphoethanolamine conjugates (PE-Cer), sulfatides (ST), as well as phosphatidylinositols (PI), phosphatidylethanolamines (PE), and phosphatidic acid (PA) species (including Lyso-forms). Indeed, many of the sphingolipid species overlap with the species previously seen in transgenic AD mouse models. Interestingly, in comparison to the animal studies, we observed an increased level of localization of PE and PI species containing arachidonic acid (AA). These findings are highly relevant, demonstrating for the first time Aβ plaque pathology-related alteration in the lipid microenvironment in humans. They provide a basis for the development of potential lipid biomarkers for AD characterization and insight into human-specific molecular pathway alterations.
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Affiliation(s)
- Wojciech Michno
- Department
of Psychiatry and Neurochemistry, Sahlgrenska Academy, University of Gothenburg, Mölndal 43180, Sweden
- Department
of Neuroscience, Physiology and Pharmacology, University College London, London WC1E6BT, United
Kingdom
- Department
of Public Health and Caring Sciences, Uppsala
University, Uppsala 75237, Sweden
- Science
for Life Laboratory (SciLife), Uppsala University, Uppsala 75237, Sweden
| | - Andrew Bowman
- Maastricht
MultiModal Molecular Imaging Institute (M4I), Maastricht University, Maastricht 6229 ER, The Netherlands
| | - Durga Jha
- Department
of Psychiatry and Neurochemistry, Sahlgrenska Academy, University of Gothenburg, Mölndal 43180, Sweden
| | - Karolina Minta
- Department
of Psychiatry and Neurochemistry, Sahlgrenska Academy, University of Gothenburg, Mölndal 43180, Sweden
| | - Junyue Ge
- Department
of Psychiatry and Neurochemistry, Sahlgrenska Academy, University of Gothenburg, Mölndal 43180, Sweden
| | - Srinivas Koutarapu
- Department
of Psychiatry and Neurochemistry, Sahlgrenska Academy, University of Gothenburg, Mölndal 43180, Sweden
| | - Henrik Zetterberg
- Department
of Psychiatry and Neurochemistry, Sahlgrenska Academy, University of Gothenburg, Mölndal 43180, Sweden
- Clinical
Neurochemistry Laboratory, Sahlgrenska University
Hospital, Mölndal 43180, Sweden
- Department
of Neurodegenerative Disease, Queen Square Institute of Neurology, University College London, Queen Square, London WC1N 3BG, United
Kingdom
- UK
Dementia Research Institute at UCL, London WC1E 6BT, United Kingdom
- Hong
Kong Center for Neurodegenerative Diseases, Clear Water Bay, Hong Kong 999077, China
- Wisconsin
Alzheimer’s Disease Research Center, University of Wisconsin School of Medicine and Public Health, University
of Wisconsin-Madison, Madison, Wisconsin 53726, United States
| | - Kaj Blennow
- Department
of Psychiatry and Neurochemistry, Sahlgrenska Academy, University of Gothenburg, Mölndal 43180, Sweden
- Clinical
Neurochemistry Laboratory, Sahlgrenska University
Hospital, Mölndal 43180, Sweden
- Paris Brain
Institute, ICM, Pitié-Salpêtrière
Hospital, Sorbonne University, Paris 75005, France
- Neurodegenerative
Disorder Research Center, Division of Life Sciences
and Medicine, Department of Neurology, Institute on Aging and Brain
Disorders, University of Science and Technology
of China and First Affiliated Hospital of USTC, Hefei 230001, P. R. China
| | - Tammaryn Lashley
- Department
of Neurodegenerative Disease, Queen Square Institute of Neurology, University College London, Queen Square, London WC1N 3BG, United
Kingdom
- Queen Square Brain Bank for Neurological
Disorders, Department of
Clinical and Movement Neurosciences, Institute of Neurology, University College London, London WC1N 1PJ, United Kingdom
| | - Ron M. A. Heeren
- Maastricht
MultiModal Molecular Imaging Institute (M4I), Maastricht University, Maastricht 6229 ER, The Netherlands
| | - Jörg Hanrieder
- Department
of Psychiatry and Neurochemistry, Sahlgrenska Academy, University of Gothenburg, Mölndal 43180, Sweden
- Clinical
Neurochemistry Laboratory, Sahlgrenska University
Hospital, Mölndal 43180, Sweden
- Department
of Neurodegenerative Disease, Queen Square Institute of Neurology, University College London, Queen Square, London WC1N 3BG, United
Kingdom
- Science for Life
Laboratory (SciLife), University of Gothenburg, Gothenburg 40530, Sweden
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Moreno-Rodriguez M, Perez SE, Martinez-Gardeazabal J, Manuel I, Malek-Ahmadi M, Rodriguez-Puertas R, Mufson EJ. Frontal Cortex Lipid Alterations During the Onset of Alzheimer's Disease. J Alzheimers Dis 2024; 98:1515-1532. [PMID: 38578893 DOI: 10.3233/jad-231485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2024]
Abstract
Background Although sporadic Alzheimer's disease (AD) is a neurodegenerative disorder of unknown etiology, familial AD is associated with specific gene mutations. A commonality between these forms of AD is that both display multiple pathogenic events including cholinergic and lipid dysregulation. Objective We aimed to identify the relevant lipids and the activity of their related receptors in the frontal cortex and correlating them with cognition during the progression of AD. Methods MALDI-mass spectrometry imaging (MSI) and functional autoradiography was used to evaluate the distribution of phospholipids/sphingolipids and the activity of cannabinoid 1 (CB1), sphingosine 1-phosphate 1 (S1P1), and muscarinic M2/M4 receptors in the frontal cortex (FC) of people that come to autopsy with premortem clinical diagnosis of AD, mild cognitive impairment (MCI), and no cognitive impairment (NCI). Results MALDI-MSI revealed an increase in myelin-related lipids, such as diacylglycerol (DG) 36:1, DG 38:5, and phosphatidic acid (PA) 40:6 in the white matter (WM) in MCI compared to NCI, and a downregulation of WM phosphatidylinositol (PI) 38:4 and PI 38:5 levels in AD compared to NCI. Elevated levels of phosphatidylcholine (PC) 32:1, PC 34:0, and sphingomyelin 38:1 were observed in discrete lipid accumulations in the FC supragranular layers during disease progression. Muscarinic M2/M4 receptor activation in layers V-VI decreased in AD compared to MCI. CB1 receptor activity was upregulated in layers V-VI, while S1P1 was downregulated within WM in AD relative to NCI. Conclusions FC WM lipidomic alterations are associated with myelin dyshomeostasis in prodromal AD, suggesting WM lipid maintenance as a potential therapeutic target for dementia.
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Affiliation(s)
- Marta Moreno-Rodriguez
- Department of Translational Neuroscience, Barrow Neurological Institute, Phoenix, AZ, USA
| | - Sylvia E Perez
- Department of Translational Neuroscience, Barrow Neurological Institute, Phoenix, AZ, USA
| | | | - Ivan Manuel
- Department of Pharmacology, Faculty of Medicine and Nursing, University of the Basque Country, Leioa, Spain
- Neurodegenerative Diseases, BioBizkaia Health Research Institute, Barakaldo, Spain
| | | | - Rafael Rodriguez-Puertas
- Department of Pharmacology, Faculty of Medicine and Nursing, University of the Basque Country, Leioa, Spain
- Neurodegenerative Diseases, BioBizkaia Health Research Institute, Barakaldo, Spain
| | - Elliott J Mufson
- Department of Translational Neuroscience, Barrow Neurological Institute, Phoenix, AZ, USA
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