Author(s): Sousa, Adelaide ; Azevedo, Rui ; Costa, Vera M. ; Oliveira, Sara ; Viana, Sofia ; Reis, Flávio ; Almeida, Agostinho ; Matafome, Paulo ; Dias-Pereira, Patrícia ; Carvalho, Félix ; Fernandes, Eduarda ; Freitas, Marisa
Date: 2024
Origin: Scientific Letters
Subject(s): Poster
Background: Silver nanoparticles (AgNP) elicit an intestinal response characterized by vascular and cellular changes, alongside the release of cytokines linked to the activation of the nuclear factor-кB (NF-кB) pathway. Consequently, a search was conducted for a compound capable of counteracting the primary pro-inflammatory effects induced by these nanoparticles [1]. Given the reported anti-inflammatory properties of quercetin and its prevalence in the human diet, the use of this compound could be considered a potential strategy for safeguarding the body against the harmful effects of AgNP [2]. Objective: Evaluate the potential protective role of quercetin against the pro-inflammatory effects induced by 5 nm polyvinylpyrrolidone (PVP)-AgNP in C57BL/6J mice. Methods: Two subacute doses of 5 nm PVP-AgNP were orally administered once daily for 14 days using a novel dosing technology (HaPILLness), facilitating stress-free, precise oral dosing. Quercetin (1 mg/kg bw) was concurrently administered via intraperitoneal injection once daily for the same 14-day period. Results: Our findings revealed that quercetin effectively reduced the intestinal inflammatory response caused by AgNP, through a reduction of the vascular and cellular alterations and also a tight regulation of the major NF-кB inflammatory pathway, leading to a notable decrease in cytokine production. Conclusions: This study provides novel insights into the potential role of quercetin in alleviating the intestinal pro-inflammatory effects induced by 5 nm PVP-AgNP.
