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Updated: Jun 17, 2026
Primary Microglia Isolation from Mixed Glial Cell Cultures of Neonatal Rat Brain Tissue
Published on: August 15, 2012
Neuroprotective compounds alter the expression of genes coding for proteins related to mitochondrial function in
Joan Serrano-Marín1, Rita Valenzuela2, Cristina Delgado1
1Molecular Neurobiology laboratory. Department of Biochemistry and Molecular Biomedicine, Faculty of Biology. Universitat de Barcelona. Barcelona. Spain.
Abstract:
A hallmark of neuroinflammatory disorders is mitochondrial dysfunction. Nevertheless, the transcriptional changes underlying this alteration are not well-defined. Microglia activation, a decrease in mitochondrion biogenesis and a subsequent alteration of the redox are common factors in diseases coursing with neuroinflammation. In the last two decades, components of the adenosinergic system have been proposed as potential therapeutic targets to combat neuroinflammation. In this research, we analyzed by RNAseq the gene expression in activated microglia treated with an adenosine A2A receptor antagonist, SCH 582561, and/or an A3 receptor agonist, 2-Cl-IB-MECA, since these receptors are deeply related to neurodegeneration and inflammation. The analysis was focused on genes related to inflammation and REDOX homeostasis. It was detected that in the three conditions (microglia treated with 2-Cl-IB-MECA, SCH 582561, and their combination) more than 40 % of the detected genes codified by the mitochondrial genome were differentially expressed (FDR < 0.05) (14/34, 16/34, and 13/34) respectively, being almost all of them (>85 %) upregulated in the microglia treated with adenosinergic compounds. Also, we analyzed the differential expression of genes related to mitochondrial function and oxidative stress codified by the nuclear genome. Additionally, we evaluated the oxygen consumption rate (OCR) of mitochondria in microglia treated with LPS and IFN-γ, both alone and in combination with adenosinergic compounds. The data showed an improvement in mitochondrial function with the antagonist of the adenosine A2A receptor, compared to the effects of pro-inflammatory stimulus, confirming a functional effect consistent with the RNAseq data.
Insights
Adenosinergic compounds significantly alter mitochondrial gene expression in activated microglia. Adenosine A2A receptor antagonism improved mitochondrial function, suggesting therapeutic potential for neuroinflammation.
Area of Science:
- Neuroscience
- Immunology
- Mitochondrial Biology
Background:
- Neuroinflammation is linked to mitochondrial dysfunction and altered redox homeostasis.
- Microglia, the brain's immune cells, play a key role in neuroinflammation.
- The adenosinergic system, particularly adenosine A2A and A3 receptors, is implicated in neurodegeneration and inflammation.
Purpose of the Study:
- To investigate the effects of adenosine A2A receptor antagonism and A3 receptor agonism on gene expression in activated microglia.
- To analyze transcriptional changes related to inflammation and redox homeostasis.
- To assess the impact of these compounds on mitochondrial function and oxygen consumption.
Main Methods:
- RNA sequencing (RNAseq) was used to analyze gene expression in activated microglia treated with SCH 582561 (A2A antagonist) and/or 2-Cl-IB-MECA (A3 agonist).
- Differential gene expression analysis focused on mitochondrial and nuclear genes involved in inflammation and redox homeostasis.
- Oxygen consumption rate (OCR) was measured in microglia treated with pro-inflammatory stimuli (LPS and IFN-γ) alone and with adenosinergic compounds.
Main Results:
- Over 40% of mitochondrial genes were differentially expressed in microglia treated with adenosinergic compounds, with most upregulated.
- Significant differential expression was observed in nuclear-encoded genes related to mitochondrial function and oxidative stress.
- Adenosine A2A receptor antagonism improved mitochondrial oxygen consumption rate compared to pro-inflammatory stimuli.
Conclusions:
- Adenosinergic compounds profoundly impact mitochondrial gene expression in activated microglia.
- Adenosine A2A receptor antagonism demonstrates a functional improvement in mitochondrial respiration.
- These findings support the potential of targeting the adenosinergic system for managing neuroinflammatory conditions characterized by mitochondrial dysfunction.
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