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Ma, Jingwei; Wei, Keke; Liu, Junwei; Tang, Ke; Zhang, Huafeng; Zhu, Liyan; Chen, Jie; Li, Fei; Xu, Pingwei; Chen, Jie; Liu, Jincheng; Fang, Haiqing; Tang, Liang; Wang, Dianheng; Zeng, Liping; Sun, Weiwei; Xie, Jing; Liu, Yuying; Huang, Bo
Nature communications, 04/2020, Letnik: 11, Številka: 1Journal Article
Our current understanding of how sugar metabolism affects inflammatory pathways in macrophages is incomplete. Here, we show that glycogen metabolism is an important event that controls macrophage-mediated inflammatory responses. IFN-γ/LPS treatment stimulates macrophages to synthesize glycogen, which is then channeled through glycogenolysis to generate G6P and further through the pentose phosphate pathway to yield abundant NADPH, ensuring high levels of reduced glutathione for inflammatory macrophage survival. Meanwhile, glycogen metabolism also increases UDPG levels and the receptor P2Y in macrophages. The UDPG/P2Y signaling pathway not only upregulates the expression of STAT1 via activating RARβ but also promotes STAT1 phosphorylation by downregulating phosphatase TC45. Blockade of this glycogen metabolic pathway disrupts acute inflammatory responses in multiple mouse models. Glycogen metabolism also regulates inflammatory responses in patients with sepsis. These findings show that glycogen metabolism in macrophages is an important regulator and indicate strategies that might be used to treat acute inflammatory diseases.
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in: SICRIS
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