Effects of polystyrene in the brackish water flea Diaphanosoma celebensis: Size-dependent acute toxicity, ingestion, egestion, and antioxidant response SCIE SCOPUS

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Title
Effects of polystyrene in the brackish water flea Diaphanosoma celebensis: Size-dependent acute toxicity, ingestion, egestion, and antioxidant response
Author(s)
Yoo, Je-Won; Cho, Hayoung; Jeon, MinJeong; Jeong, Chang-Bum; Jung, Jee Hyun; Lee, Young-Mi
KIOST Author(s)
Jung, Jee Hyun(정지현)
Publication Year
2021-06
Abstract
Owing to the increasing usage of plastics, their debris is continuously deposited in marine environments, resulting in deleterious effects on aquatic organisms. Although it is known that microplastics disturb the cellular redox status, knowledge of molecular in marine cladocerans is still lacking. In the present study, we investigated the acute toxicity of different-sized polystyrene (PS) beads (0.05, 0.5, and 6-μm diameter), ingestion and egestion patterns, their distribution in the tissues, and their effects on the antioxidant systems in the brackish water flea Diaphanosoma celebensis. All different-sized PS beads showed no mortality at the concentrations used in this study. After 48 h of exposure to PS beads of different sizes, all microbeads were retained in the digestive tract, but the retention time varied according to the bead size. In particular, the group that was exposed to 0.05-μm beads showed widely distributed fluorescence (e.g., in the embryo, and probably in lipid droplets as well as the digestive tract). The transcriptional level and enzyme activities of antioxidants were modulated depending on the size of the PS beads, and lipid peroxidation was induced in groups exposed to 0.05 and 0.5-μm beads. These findings suggest that the size of PS beads is an important factor for cellular toxicity, and can induce size-dependent oxidative stress in this species. This study provides a better understanding of the molecular modes of action of microplastics in marine zooplankton.
ISSN
0166-445X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/41278
DOI
10.1016/j.aquatox.2021.105821
Bibliographic Citation
Aquatic Toxicology, v.235, no.1, 2021
Publisher
Elsevier BV
Keywords
Antioxidant enzymes; Brackish water flea; Microplastics; Nanoplastics; Polystyrene
Type
Article
Language
English
Publisher
Elsevier BV
Related Researcher
Research Interests

Toxicology,Fish physiology,Marine environment risk assessment,독성학,어류생리학,해양환경 위해성평가

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