Silica Nanoparticles Induced Epithelial-Mesenchymal Transition in BEAS-2B Cells via ER Stress and SIRT1/HSF1/HSPs Signaling Pathway.

ABSTRACT: The extensive utilization of amorphous silica nanoparticles (SiNPs) has raised concerns regarding the potential health risks. Previous studies have indicated that SiNPs could trigger both the activation of heat shock proteins (HSPs) and epithelial-mesenchymal transition (EMT) in BEAS-2B cells; however, the underlying mechanisms require further elucidation. This study aimed to investigate how SiNPs activate the heat shock response (HSR) in BEAS-2B cells, which subsequently triggers EMT. Firstly, we observed that SiNPs were internalized by BEAS-2B cells and localized in the endoplasmic reticulum (ER), inducing ER stress. The ER stress led to the activation of SIRT1 by phosphorylation, which enhanced the nuclear transcriptional activity of HSF1 via deacetylation. HSF1 was found to upregulate

SUBMITTER: Pang J 

PROVIDER: S-EPMC12452771 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature