ArticleJournal of thoracic disease2024
Ethyl palmitate ameliorates lethal endotoxemia by inducing hepatic fetuin-A secretion: an
Article in Journal of thoracic disease, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Ethyl palmitate (EP) is known to promote hepatic fetuin-A production and modulate inflammatory responses, but its potential role in lethal endotoxemia and sepsis remains unclear. This study investigates the plasma fetuin-A levels and further evaluates the impact of hepatic fetuin-A induced by EP on systemic inflammation and macrophage polarization in lethal endotoxemia and sepsis. Methods: Blood samples from 55 sepsis patients and 18 non-septic controls with similar age and sex ratio were collected to perform proteomic analyses and identify significantly different proteins. Serum fetuin-A levels in lipopolysaccharide (LPS) induced endotoxemia mice were assayed by enzyme-linked immunosorbent assay (ELISA). The mouse hepatocyte cell (AML-12) was exposed to different concentrations of EP. Results: Our proteomic results revealed that the plasma fetuin-A levels were significantly decreased in sepsis patients compared with non-septic controls. Similarly, the serum fetuin-A levels were also reduced in endotoxemia mice compared with the control group. EP effectively promoted the production of fetuin-A in AML-12 cells and murine liver tissues. Subsequently, activation of fetuin-A by EP dramatically reduced LPS-induced murine mortality, alleviated lung and liver injury, down-regulated pro-inflammatory mediators and macrophage infiltration. Furthermore, EP regulated macrophage polarization from the M1 (CD45 Conclusions: EP-induced production of fetuin-A prevents sepsis and endotoxemia progression by promoting M2 polarization of macrophages.
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