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Biomolecules 2019, 9(2), 78;

Silver Nanoparticle-Induced Phosphorylation of Histone H3 at Serine 10 Involves MAPK Pathways

College of Environmental and Biological Engineering, Putian University, Putian 351100, China
Fujian Provincial Key Laboratory of Ecology-Toxicological Effects & Control for Emerging Contaminants, Putian 351100, China
Key Laboratory of Ecological Environment and Information Atlas (Putian University) Fujian Provincial University, Putian 351100, China
Author to whom correspondence should be addressed.
Received: 31 January 2019 / Revised: 15 February 2019 / Accepted: 18 February 2019 / Published: 22 February 2019
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The phosphorylation of histone H3 at serine 10 (p-H3S10) has been shown to be closely correlated with mitotic chromosome condensation. We previously reported that intracellular silver nanoparticles (AgNPs) release Ag ions that alter actin filament dynamics, leading to the activation of Aurora kinases and the formation of p-H3S10 through a mechanism clearly different from that occurring during mitosis. In the present study, we examined other mechanisms underlying the induction of p-H3S10 formation by AgNPs. We observed that the early formation of p-H3S10 induced by AgNPs occurred via the activation of mitogen-activated protein kinase (MAPK) pathways, specifically the Jun N-terminal protein kinase (JNK) and extracellular signal-regulated kinase (ERK) pathways. The late AgNP-induced p-H3S10 formation occurred via the activation of the entire MAPK cascade. On the other hand, p-H3S10 formation was not due to DNA damage induced by AgNPs, or the activation of the kinases ataxia telangiectasia-mutated (ATM) and ATM-Rad3-related (ATR). Several studies have compared the mechanism of AgNP toxicity to a Trojan horse-type molecular pathway. We observed different effects of AgNO3 (Ag+) and AgNPs on cells, and only the JNK inhibitor suppressed the temporary AgNO3-induced formation of p-H3S10. These results strongly indicate that AgNP-induced p-H3S10 formation does not rely solely on one signaling pathway, but rather may involve two or more pathways. View Full-Text
Keywords: silver nanoparticles; phosphorylation; histone; mitogen-activated protein kinase (MAPK); pathway silver nanoparticles; phosphorylation; histone; mitogen-activated protein kinase (MAPK); pathway

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Zhao, X.; Rao, Y.; Liang, J.; Lin, S.; Wang, X.; Li, Z.; Huang, J. Silver Nanoparticle-Induced Phosphorylation of Histone H3 at Serine 10 Involves MAPK Pathways. Biomolecules 2019, 9, 78.

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