IM, Gwang-Bum; KIM, Young Geon; JO, In-Seong; YOO, Tae Yong; KIM, Sung-Won; PARK, Hyun Su; HYEON, Taeghwan; YI, Gi-Ra; BHANG, Suk Ho

doi:10.1016/j.jhazmat.2022.128411

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IM, Gwang-Bum

KIM, Young Geon

JO, In-Seong
Centre de Recherche Paul Pascal [CRPP]

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Journal of Hazardous Materials. 2022, vol. 430, p. 128411

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Several studies have examined the effects of micro- and nanoplastics on microbes, cells, and the environment. However, only a few studies have examined their effects—especially, those of their reduced cohesiveness—on cell viability and physiology. We synthesized surfactant-free amine-functionalized polystyrene (PS) nanoparticles (NPs) and PS-NPs with decreased crosslinking density (DPS-NPs) without changing other factors, such as size, shape, and zeta potential and examined their effects on cell viability and physiology. PS- and DPS-NPs exhibited reactive oxygen species (ROS) scavenging activity by upregulating GPX3 expression and downregulating HSP70 (ROS-related gene) and XBP1 (endoplasmic reticulum stress-related gene) expression in human bone marrow-derived mesenchymal stem cells (hBM-MSCs). Additionally, they led to upregulation of MFN2 (mitochondrial fusion related gene) expression and downregulation of FIS1 (mitochondrial fission related gene) expression, indicating enhanced mitochondrial fusion in hBM-MSCs. Cell-cycle analysis revealed that PS- and DPS-NPs increased the proportion of cells in the S phase, indicating that they promoted cell proliferation and, specifically, the adipogenic differentiation of hBM-MSCs. However, the cytotoxicity of DPS-NPs against hBM-MSCs was higher than that of PS-NPs after long-term treatment under adipogenic conditions.< Réduire

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Adipogenic differentiation

Mesenchymal stem cells

Nanoplastics

Polystyrene

Reactive oxygen species scavenging

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Effect of polystyrene nanoplastics and their degraded forms on stem cell fate

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