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Efficacy of caerulomycin A in modulating macrophage polarization and cytokine response in a murine model of lipopolysaccharide-induced sepsis

  • 0Infectious Diseases Department, Jinhua Central Hospital, Jinhua, 321000, China. zhangjun1232029@163.com.
European Journal of Medical Research +

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January 10, 2025

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January 10, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Caerulomycin A (caeA) treatment improved survival in sepsis models by modulating macrophage polarization. It reduced M1 markers and pro-inflammatory cytokines while increasing M2 markers and anti-inflammatory cytokines, potentially via the JAK-STAT pathway.

Area Of Science

  • Immunology
  • Pharmacology
  • Molecular Biology

Background

  • Sepsis involves an excessive immune response, with macrophage polarization playing a key role.
  • Modulating macrophage polarization offers a potential therapeutic strategy for sepsis.
  • Caerulomycin A (caeA), a STAT1 phosphorylation inhibitor, was investigated for its effects on macrophage polarization in sepsis.

Purpose Of The Study

  • To explore the therapeutic potential of Caerulomycin A (caeA) in a lipopolysaccharide (LPS)-induced sepsis mouse model.
  • To investigate the effects of caeA on macrophage polarization (M1/M2) and inflammatory markers.
  • To elucidate the impact of caeA on the JAK-STAT signaling pathway.

Main Methods

  • Established a lipopolysaccharide (LPS)-induced sepsis model in C57BL/6 mice.
  • Assessed survival rates and determined optimal caeA dosage.
  • Utilized RAW264.7 macrophage cell line for in-vitro studies, including MTT assay, qRT-PCR, ELISA, Western blot, and flow cytometry.
  • Analyzed M1/M2 macrophage markers, inflammatory factors, and JAK-STAT pathway phosphorylation (STAT1, STAT6).

Main Results

  • caeA treatment (20 mg/kg) significantly improved survival in septic mice.
  • caeA reduced M1 macrophage markers (CD86, NOS2) and pro-inflammatory cytokines (IL-1β, IL-6, TNF-α).
  • caeA increased M2 macrophage markers (CD206, ARG1) and anti-inflammatory cytokines (IL-4, IL-10), inhibited STAT1 phosphorylation, and enhanced STAT6 phosphorylation.

Conclusions

  • Caerulomycin A (caeA) effectively modulates macrophage polarization in sepsis.
  • caeA attenuates the inflammatory response in septic mice, likely through the JAK-STAT signaling pathway.
  • These findings suggest caeA as a promising therapeutic candidate for sepsis.

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