start-ver=1.4
cd-journal=joma
no-vol=358
cd-vols=
no-issue=
article-no=
start-page=142060
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2024
dt-pub=202406
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Size, polyglycerol grafting, and net surface charge of iron oxide nanoparticles determine their interaction and toxicity in Caenorhabditis elegans
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The widespread application of engineered nanoparticles (NPs) in environmental remediation has raised public concerns about their toxicity to aquatic organisms. Although appropriate surface modification can mitigate the ecotoxicity of NPs, the lack of polymer coating to inhibit toxicity completely and the insufficient knowledge about charge effect hinder the development of safe nanomaterials. Herein, we explored the potential of polyglycerol (PG) functionalization in alleviating the environmental risks of NPs. Iron oxide NPs (ION) of 20, 100, and 200 nm sizes (IONS, IONM and IONL, respectively) were grafted with PG to afford ION-PG. We examined the interaction of ION and ION-PG with Caenorhabditis elegans (C. elegans) and found that PG suppressed non-specific interaction of ION with C. elegans to reduce their accumulation and to inhibit their translocation. Particularly, IONS-PG was completely excluded from worms of all developmental stages. By covalently introducing sulfate, carboxyl and amino groups onto IONS-PG, we further demonstrated that positively charged IONS-PG-NH3+ induced high intestinal accumulation, cuticle adhesion and distal translocation, whereas the negatively charged IONS-PG-OSO3– and IONS-PG-COO– were excreted out. Consequently, no apparent deleterious effects on brood size and life span were observed in worms treated by IONS-PG and IONS-PG bearing negatively charged groups. This study presents new surface functionalization approaches for developing ecofriendly nanomaterials.
en-copyright=
kn-copyright=

en-aut-name=ZouYajuan
en-aut-sei=Zou
en-aut-mei=Yajuan
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=ShikanoYutaka
en-aut-sei=Shikano
en-aut-mei=Yutaka
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=NishinaYuta
en-aut-sei=Nishina
en-aut-mei=Yuta
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=KomatsuNaoki
en-aut-sei=Komatsu
en-aut-mei=Naoki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=Kage-NakadaiEriko
en-aut-sei=Kage-Nakadai
en-aut-mei=Eriko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=FujiwaraMasazumi
en-aut-sei=Fujiwara
en-aut-mei=Masazumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

affil-num=1
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Institute of Systems and Information Engineering, University of Tsukuba
kn-affil=

affil-num=3
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=4
en-affil=Graduate School of Human and Environmental Studies, Kyoto University
kn-affil=

affil-num=5
en-affil=Department of Nutrition, Graduate School of Human Life and Ecology, Osaka Metropolitan University
kn-affil=

affil-num=6
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
en-keyword=iron oxide nanoparticles
kn-keyword=iron oxide nanoparticles
en-keyword=polyglycerol functionalization
kn-keyword=polyglycerol functionalization
en-keyword=C. elegans
kn-keyword=C. elegans
en-keyword=accumulation
kn-keyword=accumulation
en-keyword=distribution
kn-keyword=distribution
en-keyword=toxicity
kn-keyword=toxicity
END