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Reprograming Model of Human Monocyte-derived Macrophages for In-vitro Assays
Published on: April 18, 2025
MicroRNA regulation of macrophages in human pathologies
Yuanyuan Wei1,2, Andreas Schober3,4
1Experimental Vascular Medicine, Institute for Cardiovascular Prevention, Ludwig-Maximilians-University Munich, Pettenkoferstrasse 9, 80336, Munich, Germany.
Abstract:
Macrophages play a crucial role in the innate immune system and contribute to a broad spectrum of pathologies, like in the defence against infectious agents, in inflammation resolution, and wound repair. In the past several years, microRNAs (miRNAs) have been demonstrated to play important roles in immune diseases by regulating macrophage functions. In this review, we will summarize the role of miRNAs in the differentiation of monocytes into macrophages, in the classical and alternative activation of macrophages, and in the regulation of phagocytosis and apoptosis. Notably, miRNAs preferentially target genes related to the cellular cholesterol metabolism, which is of key importance for the inflammatory activation and phagocytic activity of macrophages. miRNAs functionally link various mechanisms involved in macrophage activation and contribute to initiation and resolution of inflammation. miRNAs represent promising diagnostic and therapeutic targets in different conditions, such as infectious diseases, atherosclerosis, and cancer.
Insights
MicroRNAs (miRNAs) regulate macrophage functions, impacting immune responses and diseases. These miRNAs are key targets for diagnosing and treating conditions like atherosclerosis and cancer.
Area of Science:
- Immunology
- Molecular Biology
Background:
- Macrophages are vital immune cells involved in host defense, inflammation, and tissue repair.
- MicroRNAs (miRNAs) are increasingly recognized for their regulatory roles in immune cell function and disease pathogenesis.
Purpose of the Study:
- To review the multifaceted roles of miRNAs in macrophage biology.
- To highlight the significance of miRNAs in monocyte differentiation, macrophage activation states, phagocytosis, and apoptosis.
Main Methods:
- Literature review focusing on studies investigating miRNA involvement in macrophage differentiation and activation.
- Analysis of research on miRNA regulation of macrophage functions, including phagocytosis and apoptosis.
- Examination of the link between miRNAs, cholesterol metabolism, and macrophage inflammatory responses.
Main Results:
- miRNAs critically regulate monocyte-to-macrophage differentiation and macrophage activation pathways (classical and alternative).
- miRNAs influence key macrophage functions such as phagocytosis and apoptosis.
- miRNAs target genes involved in cellular cholesterol metabolism, impacting macrophage inflammatory and phagocytic activities.
Conclusions:
- miRNAs act as crucial regulators, integrating various mechanisms of macrophage activation and inflammation.
- miRNAs hold significant potential as diagnostic biomarkers and therapeutic targets for inflammatory and immune-related diseases, including infectious diseases, atherosclerosis, and cancer.
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