CircMETTL3-156aa reshapes the glycolytic metabolism of macrophages to promote M1 polarization and induce cytokine storms in sHLH

Persistent macrophage activation and cytokine storms are critical causes for the rapid disease progression and high mortality rate of Secondary Hemophagocytic lymphohistiocytosis (sHLH). Identification of key regulatory factors that govern the activation of macrophages is vital. Plasma exosomal circ...

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Bibliographic Details
Published in:Cell death discovery 2024-10, Vol.10 (1), p.431-15, Article 431
Main Authors: Xie, Longlong, Deng, Xiangying, Li, Xiao, Li, Xun, Wang, Xiangyu, Yan, Haipeng, Zhao, Lin, Yang, Dan, Luo, Ting, Yang, Yufan, Xiao, Zhenghui, Lu, Xiulan
Format: Article
Language:English
Subjects:
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Apoptosis
Biochemistry
Biomedical and Life Sciences
Cell activation
Cell Biology
Cell Cycle Analysis
Circular RNA
Cytokine storm
Cytokines
Exosomes
Gene expression
Glycolysis
Histiocytosis
L-Lactate dehydrogenase
Lactic acid
Life Sciences
Lymphocytosis
Macrophages
mRNA
Polarization
Stem Cells
Therapeutic targets
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Summary:Persistent macrophage activation and cytokine storms are critical causes for the rapid disease progression and high mortality rate of Secondary Hemophagocytic lymphohistiocytosis (sHLH). Identification of key regulatory factors that govern the activation of macrophages is vital. Plasma exosomal circular RNAs (circRNAs) are considered important biomarkers and potential therapeutic targets for various diseases, however, their function in sHLH is still unclear. In this study, we demonstrated for the first time that circMETTL3, derived from METTL3, is upregulated in sHLH patient plasma exosomes, which may plays an important role in the diagnosis of sHLH. Significantly, we also revealed that a novel peptide encoded by circMETTL3, METTL3-156aa, is an inducer of M1 macrophage polarization, which is responsible for the development of cytokine storms during sHLH. We then identified that METTL3-156aa binding with lactate dehydrogenase A (LDHA) and promotes M1 macrophage polarization by enhancing macrophage glycolysis. Additionally, the glycolysis metabolite lactate upregulates the cleavage factor SRSF10 expression by lactylation. This results in increased splicing of the pre-METTL3 mRNA, leading to an enchance in the production of cirMETTL3. Therefore, our results suggest that the circMETTL3/METTL3-156aa/LDHA/Lactate/SRSF10 axis forms a positive feedback loop and may be a novel therapeutic target for the treatment of sHLH.
ISSN:2058-7716
2058-7716
DOI:10.1038/s41420-024-02202-0