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Eskandari-Sedighi G, Crichton M, Zia S, Gomez-Cardona E, Cortez LM, Patel ZH, Takahashi-Yamashiro K, St Laurent CD, Sidhu G, Sarkar S, Aghanya V, Sim VL, Tan Q, Julien O, Plemel JR, Macauley MS. Alzheimer's disease associated isoforms of human CD33 distinctively modulate microglial cell responses in 5XFAD mice. Mol Neurodegener 2024; 19:42. [PMID: 38802940 PMCID: PMC11129479 DOI: 10.1186/s13024-024-00734-8] [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: 07/10/2023] [Accepted: 05/16/2024] [Indexed: 05/29/2024] Open
Abstract
Microglia play diverse pathophysiological roles in Alzheimer's disease (AD), with genetic susceptibility factors skewing microglial cell function to influence AD risk. CD33 is an immunomodulatory receptor associated with AD susceptibility through a single nucleotide polymorphism that modulates mRNA splicing, skewing protein expression from a long protein isoform (CD33M) to a short isoform (CD33m). Understanding how human CD33 isoforms differentially impact microglial cell function in vivo has been challenging due to functional divergence of CD33 between mice and humans. We address this challenge by studying transgenic mice expressing either of the human CD33 isoforms crossed with the 5XFAD mouse model of amyloidosis and find that human CD33 isoforms have opposing effects on the response of microglia to amyloid-β (Aβ) deposition. Mice expressing CD33M have increased Aβ levels, more diffuse plaques, fewer disease-associated microglia, and more dystrophic neurites compared to 5XFAD control mice. Conversely, CD33m promotes plaque compaction and microglia-plaque contacts, and minimizes neuritic plaque pathology, highlighting an AD protective role for this isoform. Protective phenotypes driven by CD33m are detected at an earlier timepoint compared to the more aggressive pathology in CD33M mice that appears at a later timepoint, suggesting that CD33m has a more prominent impact on microglia cell function at earlier stages of disease progression. In addition to divergent roles in modulating phagocytosis, scRNAseq and proteomics analyses demonstrate that CD33m+ microglia upregulate nestin, an intermediate filament involved in cell migration, at plaque contact sites. Overall, our work provides new functional insights into how CD33, as a top genetic susceptibility factor for AD, modulates microglial cell function.
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Affiliation(s)
| | | | - Sameera Zia
- Division of Neurology, Department of Medicine, University of Alberta, Edmonton, Canada
| | | | - Leonardo M Cortez
- Division of Neurology, Department of Medicine, University of Alberta, Edmonton, Canada
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada
| | - Zain H Patel
- Department of Cell Biology, University of Alberta, Edmonton, Canada
| | | | | | - Gaurav Sidhu
- Department of Chemistry, University of Alberta, Edmonton, Canada
| | - Susmita Sarkar
- Department of Chemistry, University of Alberta, Edmonton, Canada
| | - Vivian Aghanya
- Department of Chemistry, University of Alberta, Edmonton, Canada
| | - Valerie L Sim
- Division of Neurology, Department of Medicine, University of Alberta, Edmonton, Canada
- Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada
| | - Qiumin Tan
- Department of Cell Biology, University of Alberta, Edmonton, Canada
| | - Olivier Julien
- Department of Biochemistry, University of Alberta, Edmonton, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada
| | - Jason R Plemel
- Division of Neurology, Department of Medicine, University of Alberta, Edmonton, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, Canada
| | - Matthew S Macauley
- Department of Chemistry, University of Alberta, Edmonton, Canada.
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada.
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, Canada.
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Qing L, Zhu Y, Yu C, Zhang Y, Ni J. Exploring the association between dietary Inflammatory Index and chronic pain in US adults using NHANES 1999-2004. Sci Rep 2024; 14:8726. [PMID: 38622145 PMCID: PMC11018766 DOI: 10.1038/s41598-024-58030-w] [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: 01/09/2024] [Accepted: 03/25/2024] [Indexed: 04/17/2024] Open
Abstract
Chronic pain, a substantial public health issue, may be influenced by dietary patterns through systemic inflammation. This cross-sectional study explored the association between Dietary Inflammatory Index (DII) and chronic pain among 2581 American adults from NHANES data. The DII, ranging from - 4.98 to 4.69, reflects the inflammatory potential of the diet, with higher scores indicating greater pro-inflammatory capacity. Our findings showed no significant association between the continuous DII score and chronic pain prevalence. However, a nonlinear relationship emerged. When the DII was categorized, a significant association between higher DII scores (DII ≥ 2.5) and chronic pain prevalence was observed. The analysis uncovered a U-shaped pattern, with an inflection point at a DII score of - 0.9, indicating an association between both low and high levels of dietary inflammation are associated with higher pain prevalence. This nuanced interaction between dietary inflammation and chronic pain indicates the possibility of incorporating dietary modification into pain management strategies and underscores the need for further research into the long-term effects of diet on chronic pain.
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Affiliation(s)
- Lunxue Qing
- The First Clinical Medical College, Beijing University of Chinese Medicine, Beijing, China
| | - Yingying Zhu
- The First Clinical Medical College, Beijing University of Chinese Medicine, Beijing, China
| | - Changhe Yu
- Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Haiyuncang, Dongcheng District, Beijing, 100700, China
| | - Yang Zhang
- Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Haiyuncang, Dongcheng District, Beijing, 100700, China.
| | - Jinxia Ni
- Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Haiyuncang, Dongcheng District, Beijing, 100700, China.
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Li L, Li T, Qu X, Sun G, Fu Q, Han G. Stress/cell death pathways, neuroinflammation, and neuropathic pain. Immunol Rev 2024; 321:33-51. [PMID: 37688390 DOI: 10.1111/imr.13275] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 08/14/2023] [Accepted: 08/27/2023] [Indexed: 09/10/2023]
Abstract
Neuropathic pain is a common and debilitating modality of chronic pain induced by a lesion or disease of the somatosensory nervous system. Albeit the elucidation of numerous pathophysiological mechanisms and the development of potential treatment compounds, safe and reliable therapies of neuropathic pain remain poor. Multiple stress/cell death pathways have been shown to be implicated in neuroinflammation during neuropathic pain. Here, we summarize the current knowledge of stress/cell death pathways and present an overview of the roles and molecular mechanisms of stress/cell death pathways in neuroinflammation during neuropathic pain, covering intrinsic and extrinsic apoptosis, autophagy, mitophagy, ferroptosis, pyroptosis, necroptosis, and phagoptosis. Small molecule compounds that modulate stress/cell death pathways in alleviating neuropathic pain are discussed mainly based on preclinical neuropathic pain models. These findings will contribute to in-depth understanding of the pathological processes during neuropathic pain as well as bridge the gap between basic and translational research to uncover new neuroprotective interventions.
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Affiliation(s)
- Lu Li
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Tian Li
- School of Basic Medicine, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xinyu Qu
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Guangwei Sun
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Qi Fu
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Guang Han
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
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