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In Silico Exploration of Natural Antioxidants for Sepsis Drug Discovery

Authors: Celia María Curieses Andrés; Elena Bustamante Munguira; Celia Andrés Juan; Fernando Lobo; Eduardo Pérez-Lebeña; José Manuel Pérez de la Lastra;

In Silico Exploration of Natural Antioxidants for Sepsis Drug Discovery

Abstract

Sepsis, a life-threatening condition characterized by immune dysregulation and organ damage, remains a significant clinical challenge. Natural antioxidant compounds (NAOs) such as quercetin, EGCG, resveratrol, curcumin, and chlorogenic acid have shown promising anti-inflammatory and anti-apoptotic effects in preclinical models of sepsis and related conditions, yet the molecular mechanisms underlying their actions remain incompletely defined. In this study, we performed comprehensive molecular docking analyses to investigate the binding affinities and interaction profiles of these NAOs with three key proteins central to inflammatory and apoptotic signaling: Toll-like receptor 4 (TLR-4), interleukin-1 receptor-associated kinase 1 (IRAK1), and caspase-3. Our results demonstrate that all five compounds exhibit favorable binding affinities with these targets, forming multiple hydrogen bonds and hydrophobic interactions with critical active site residues. Notably, curcumin and EGCG consistently displayed the strongest binding affinities across the three proteins, with docking scores comparable to or surpassing those of reference inhibitors. Resveratrol demonstrated highly stable binding poses, particularly with caspase-3, while quercetin and chlorogenic acid showed moderate but reproducible affinities. Overall, this study provides new mechanistic insights into how NAOs may target central mediators of inflammation and cell death. Experimental validation is essential to confirm these interactions, assess binding affinities, and fully elucidate the therapeutic potential of NAOs in sepsis.

Keywords

Curcumin, Organic chemistry, http://metadata.un.org/sdg/3, Article, Antioxidants, Catechin, sepsis, QD241-441, Sepsis, Drug Discovery, Humans, Computer Simulation, Ensure healthy lives and promote well-being for all at all ages, Caspase 3, pathogenesis, Traditional medicine, Hydrogen Bonding, molecular docking, nanomedicine, Molecular Docking Simulation, Toll-Like Receptor 4, antioxidants, Interleukin-1 Receptor-Associated Kinases, normal mode analysis, Resveratrol, Molecular docking, Quercetin, Chlorogenic Acid, Protein Binding

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    popularity
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    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
3
Top 10%
Average
Average
Green
gold