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Temporal Shifts in MicroRNAs Signify the Inflammatory State of Primary Murine Microglial Cells
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Abstract
The primary function of microglia is to maintain brain homeostasis. In neurodegenerative diseases like Alzheimer’s, microglia contribute to neurotoxicity and inflammation. In this study, we exposed neonatal murine primary microglial cultures to stimuli mimicking pathogens, injury, or toxins. Treatment with benzoyl ATP (bzATP) and lipopolysaccharide (LPS) triggered a coordinated increase in interleukin and chemokine expression. We analyzed statistically significant differentially expressed microRNAs (DEMs) at 3 and 8 h post-activation, identifying 33 and 57 DEMs, respectively. Notably, miR-155, miR-132, miR-3473e, miR-222, and miR-146b showed strong temporal regulation, while miR-3963 was sharply downregulated by bzATP. These DEMs regulate inflammatory pathways, including TNFα and NFκB signaling. We also examined the effect of ladostigil, a neuroprotective agent known to reduce oxidative stress and inflammation. At 8 h post-activation, ladostigil induced upregulation of anti-inflammatory miRNAs, such as miR-27a, miR-27b, and miR-23b. Our findings suggest that miRNA profiles reflect microglial responses to inflammatory cues and that ladostigil modulates these responses. This model of controlled microglial activation offers a powerful tool with which to study inflammation in the aging brain and the progression of neurodegenerative diseases.
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“Interestingly, miR-132-5p was recently reported to be among a small set of temporally responsive core miRNAs that drive the establishment and resolution of the inflammatory response upon exposure of healthy murine microglia to LPS [135].”
From microRNA-132 attenuates inflammation in induced pluripotent stem cell-derived microglia from Alzheimer’s disease patients (2026) · cites this paper as [135]
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Cites
Identification of a unique TGF-β–dependent molecular and functional signature in microglia
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Role of neuroinflammation in neurodegeneration development
Zhang, W., Xiao, D., Mao, Q., & Xia, H. (2023) · Signal Transduction and Targeted Therapy · doi:10.1038/s41392-023-01486-5 · Cited by 1,668 · cited 1×
“Microglia, the resident immune cells of the CNS, play a central role in responding to injury and pathological stimuli [3].”
MiR-155: An Important Regulator of Neuroinflammation
Zingale, V. D., Gugliandolo, A., & Mazzon, E. (2021) · International Journal of Molecular Sciences · doi:10.3390/ijms23010090 · Cited by 163
Harrison, E. B., Hochfelder, C. G., Lamberty, B. G., Meays, B. M., Morsey, B. M., Kelso, M. L., Fox, H. S., & Yelamanchili, S. V. (2016) · FEBS Open Bio · doi:10.1002/2211-5463.12092 · Cited by 151
Absence of miRNA-146a Differentially Alters Microglia Function and Proteome
Martin, N. A., Hyrlov, K. H., Elkjaer, M. L., Thygesen, E. K., Wlodarczyk, A., Elbaek, K. J., Aboo, C., Okarmus, J., Benedikz, E., Reynolds, R., et al. (2020) · Frontiers in Immunology · doi:10.3389/fimmu.2020.01110 · Cited by 36
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Cited by
Sorted by citations
Penning, A., Snoeck, S., Ormaechea, O. R., Ayyildiz, D., Polzer, O., Buitrago-Arango, M., Capobianco, R., de Winter, F., Balusu, S., Verhaagen, J., et al. (2026) · Acta Neuropathologica Communications · doi:10.1186/s40478-026-02228-8 · Cited by 6
Metadata
- Authors
- Zohar, K., Lezmi, E., Reichert, F., Eliyahu, T., Rotshenker, S., Weinstock, M., & Linial, M.
- Affiliations
- Department of Biological Chemistry, Institute of Life Science, Faculty of Science, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
- Department of Genetics, Institute of Life Science, Faculty of Science, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
- Department of Medical Neurobiology, Institute for Medical Research Israel-Canada (IMRIC), Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91121, Israel
- Institute of Drug Research, School of Pharmacy, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
- ORCID
- Linial, Michal
- Venue
- International Journal of Molecular Sciences
- Publisher
- MDPI AG
- Published
- 2025-06-13
- Volume
- 26
- Issue
- 12
- Pages
- 5677
- ISSN
- 1422-0067
- PMC
- PMC12193602
- Cited by
- 1
- References
- 5
- Language
- en
- Funders
- the Hebrew University of Jerusalem
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