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Isolation of Murine Peritoneal Macrophages to Carry Out Gene Expression Analysis Upon Toll-like Receptors Stimulation
Published on: April 29, 2015
Next-generation sequencing of microRNAs uncovers expression signatures in polarized macrophages
Viviana Cobos Jiménez1, Edward J Bradley, Antonius M Willemsen
1Department of Experimental Immunology, Sanquin Research, Landsteiner Laboratory, and Center for Infectious Diseases and Immunity Amsterdam (CINIMA), Academic Medical Center of the University of Amsterdam, Amsterdam, The Netherlands;
Abstract:
microRNAs (miRNAs) are small noncoding RNAs that regulate gene expression at a posttranscriptional level and play a crucial role in the development of cells of the immune system. Macrophages are essential for generating inflammatory reactions upon tissue damage and encountering of invading pathogens, yet modulation of their immune responses is critical for maintaining tissue homeostasis. Macrophages can present different phenotypes, depending on the cytokine environment they encounter in the affected tissues. In this study, we have identified expression signatures of miRNAs that are differentially regulated during maturation of monocytes and polarization of macrophages by cytokines. We present a comprehensive characterization of miRNA expression in human monocytes and M1, M2a, and M2c polarized macrophages, using next-generation sequencing. Furthermore, we show that miRNA expression signatures are closely related to the various immune functions of polarized macrophages and therefore are involved in shaping the diverse phenotypes of these cells. The miRNAs identified here serve as markers for identification of inflammatory macrophages involved in the development of immune responses. Our findings contribute to understanding the role of miRNAs in determining the macrophage function in healthy and diseased tissues.
Insights
MicroRNAs (miRNAs) regulate gene expression and immune cell development. This study identifies miRNA signatures in human monocytes and macrophages, revealing their role in immune responses and tissue homeostasis.
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Background:
- MicroRNAs (miRNAs) are key regulators of gene expression post-transcriptionally.
- Macrophages are crucial immune cells with diverse phenotypes influenced by their environment.
- Understanding miRNA roles is vital for immune homeostasis and disease research.
Purpose of the Study:
- To identify miRNA expression signatures during monocyte maturation and macrophage polarization.
- To characterize miRNA expression profiles in human monocytes and M1, M2a, M2c polarized macrophages.
- To correlate miRNA signatures with macrophage immune functions and phenotypes.
Main Methods:
- Next-generation sequencing was employed for comprehensive miRNA expression profiling.
- Human monocytes were differentiated and polarized into M1, M2a, and M2c macrophage phenotypes.
- Bioinformatic analysis was used to identify differentially expressed miRNAs and their functional relevance.
Main Results:
- Distinct miRNA expression signatures were identified in monocytes and polarized macrophages.
- These miRNA signatures correlate with specific immune functions and phenotypes of macrophages.
- Identified miRNAs serve as potential markers for inflammatory macrophages.
Conclusions:
- miRNAs play a significant role in shaping macrophage function and immune responses.
- miRNA expression profiling provides insights into macrophage diversity and immune regulation.
- Findings advance the understanding of miRNA involvement in healthy and diseased tissues.
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