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Activation of M1 macrophages in sepsis-induced acute kidney injury in response to heparin-binding protein

BACKGROUND: In the early stage of sepsis, M1 macrophages result in the production of inflammatory mediators and AKI. Heparin-binding protein (HBP) have been shown to play important roles in sepsis-induced AKI. In this study, we investigate the association of HBP with M1 macrophages in sepsis-induced...

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Detalles Bibliográficos
Autores principales: Xing, Li, Zhongqian, Lu, Chunmei, Song, Pingfa, Chen, Lei, He, Qin, Jin, Genhua, Mu, Yijun, Deng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5933766/
https://www.ncbi.nlm.nih.gov/pubmed/29723248
http://dx.doi.org/10.1371/journal.pone.0196423
Descripción
Sumario:BACKGROUND: In the early stage of sepsis, M1 macrophages result in the production of inflammatory mediators and AKI. Heparin-binding protein (HBP) have been shown to play important roles in sepsis-induced AKI. In this study, we investigate the association of HBP with M1 macrophages in sepsis-induced AKI. METHODS: Male C57BL6 mice were subjected to cecal ligation and puncture (CLP) or sham surgery. Biochemical and histological renal damage was assessed. Macrophage infiltration was assessed by immunohistochemistry. RT-PCR was used to investigate the expression of heparin-binding protein (HBP), the inducible nitric oxide synthase (iNOS) and arginase 1 (Arg-1) mRNAs. Western blots were performed to assay the tissue levels of HBP, tumor necrosis factor alpha (TNF-α) and interleukin-6 (IL-6). RESULTS: High levels of HBP were obviously detected 24 h after sepsis-induced AKI. Heparin inhibited HBP expression during sepsis-induced AKI. The suppression of HBP expression by heparin injection after the establishment of sepsis-induced AKI resulted in a reduction in renal injury severity accompanied with a significant repression of M1 macrophage activation and expression of TNF-α and IL-6. CONCLUSIONS: HBP plays an important role in the initial inflammatory reaction associated with sepsis-induced AKI, presumably by activating M1 macrophages and suppressing TNF-α and IL-6 secretion.