Role of metabolic programming in the modulation of microglia phagocytosis by lipids
Abstract
Microglia phagocytosis is an essential process to maintain lifelong brain homeostasis and clear potential toxic factors from the neuropil. Microglia can engulf cells or part of cells through the expression of specific receptors at their surface and activation of downstream signaling pathways to engulf material. Microglia phagocytosis is finely regulated and is under the dependence of many factors, including environmental cues such as dietary lipids. Yet, the molecular mechanisms implicated are still largely unknown. The present publication is a 'hypothesis review', assessing the possibility that lipid-mediated modulation of phagocytosis occurs by affecting bioenergetic pathways within microglia. I assess our present knowledge and the elements that allow drawing such hypothesis. I also list some of the important gaps in the literature that need to be filled in. I also consider opportunities for future therapeutic target including nutritional interventions.
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At sites of atherosclerotic lesions, lipid droplet rich foamy macrophages show decreased phagocytosis activity compared to macrophages without lipid droplets.
“This finding is in line with a previous report which observed that at the sites of atherosclerotic lesions, lipid droplet rich foamy macrophages show decreased phagocytosis activity compared to macrophages without lipid droplets46.”
From Lipid-droplet-accumulating microglia represent a dysfunctional and proinflammatory state in the aging brain (2020) · cites this paper as [46]
LD-accumulating microglia (LDAM) have phagocytosis deficits, produce excessive ROS and pro-inflammatory cytokines, and are implicated in the pathogenesis and progression of neuroinflammatory diseases.
“LD accumulating microglia (LDAM) have phagocytosis deficits, produce excessive amounts of reactive oxygen species (ROS) and pro-inflammatory cytokines, and are increasingly implicated in the pathogenesis and progression of neuroinflammatory diseases [17,18,19].”
From Lipoprotein Lipase Regulates Microglial Lipid Droplet Accumulation (2021) · cites this paper as [17]
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- Authors
- Nadjar, A.
- Affiliations
- Université de Bordeaux (FR)
- Corresponding author
- Nadjar, A.
- ORCID
- Nadjar, A.
- Venue
- Prostaglandins, Leukotrienes and Essential Fatty Acids
- Publisher
- Elsevier BV
- Published
- 2018-08
- Volume
- 135
- Pages
- 63-73
- ISSN
- 0952-3278 (ISSN-L)
- OpenAlex
- W2883170738
- Cited by
- 49
- References
- 30
- Citations by year
- 2026: 4 · 2025: 5 · 2024: 8 · 2023: 8 · 2022: 5 · 2021: 11 · 2020: 5 · 2019: 3
- FWCI
- 0.45
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Prostaglandins Leukotrienes and Essential Fatty Acids (publishedVersion)
- PubMed (publishedVersion)
- HAL (submittedVersion)
- Funders
- Agence Nationale de la Recherche (ANR-10-LABX-0043)
- Topics
- Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
- Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
- Life Sciences › Immunology and Microbiology › Immunology › Phagocytosis and Immune Regulation
- Keywords
- microglia, phagocytosis, metabolic programming, dietary fat, lipid receptors, brain homeostasis, dietary intervention, therapeutic target
- MeSH terms
- Animals, Dietary Fats, Energy Metabolism, Humans, Phagocytosis, Signal Transduction, Microglia, Lipid Metabolism
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