ArticleInflammation2025
A Quinoxaline Derivative as a New Therapeutic Agent for Sepsis through Suppression of TLR4 Signaling Pathways.
Article in Inflammation, 2025. 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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2 authors.
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Abstract
Sepsis is a severe systemic inflammatory syndrome and one of the leading causes of global morbidity and mortality. Preclinical studies have identified several quinoxaline-based compounds with anti-inflammatory properties, but their effects in sepsis have not been investigated. This study aimed to identify a quinoxaline derivative with anti-inflammatory properties in sepsis. Examining the inflammatory response of primary mouse macrophages to Lipopolysaccharides (LPS) revealed that 2-methoxy-N-(3-quinoxalin-2-ylphenyl)benzamide (2-MQB) is a promising molecule. It suppressed the production of several inflammatory cytokines, including Interleukin-1β (IL-1β), IL-6, IL-12p70, Interferon-γ (IFN-γ), IFN-β, and Tumor necrosis factor-α (TNF-α). Importantly, 2-MQB inhibited the transcriptional activities of Toll-like receptor 4 (TLR4) signaling pathways, including Nuclear factor-κB (NF-κB) and Interferon regulatory factor 3 (IRF3). This was accompanied by lower expression of TLR4, Myeloid differentiation primary response 88 (MyD88), TIR Domain-containing adaptor molecule 1 (Trif), and TNF Receptor-associated factor 3 (Traf3). Additionally, 2-MQB selectively reduced the expression of genes encoding CD80, CD86, and Programmed death-ligand 1 (PD-L1). In vivo, 2-MQB improved mice survival, mitigated tissue damage in the spleen, kidney, and lung, and reduced pro-inflammatory cytokine levels in both LPS-induced endotoxin shock and Cecal ligation and puncture (CLP) models. Notably, 2-MQB decreased the numbers of CD4
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