곽인실 (전남대학교)

한빛사논문

조회242

전남대학교

J. Hazard. Mater., Oct 04 2023, 462 S0304-3894(23)01974-X | https://doi.org/10.1016/j.jhazmat.2023.132691 Bioaccumulation, microbiome composition and immunity, and epigenetic signatures associated with exposure to spherical, fibrous, and fragmented microplastics in the mussel Mytilus galloprovincialis

Kiyun Park ^a, Won-Seok Kim ^b, Ji Won Park ^b, Tae Hee Kim ^c, Ihn-Sil Kwak ^a,b

^aFisheries Science Institute, Chonnam National University, Yeosu 59626, South Korea

^bFaculty of Marine Technology, Chonnam National University, Yeosu 550-749, South Korea

^cAdvanced Textile R&D Department, Korea Institute of Industrial Technology, Ansan 426-171, South Korea

Correspondence to: Ihn-Sil Kwak

Abstract

Microplastic (MP) pollution has become a major global concern due to the widespread use and discharge of plastics into the environment. However, very few studies have assessed the potential variations in the toxicity of MPs according to their shape and size. Therefore, our study sought to identify the biotoxic effects of spherical, fiber-shaped, and fragment-shaped polyethylene terephthalate MPs of different sizes at different concentrations on the Mediterranean mussel Mytilus galloprovincialis. The survival rate after exposure to small-sized MPs was lower than that observed for the larger type MPs. Bioaccumulation of MPs was different depending on the exposure periods and MP shapes. Interestingly, the fiber-shaped MPs underwent morphological modifications in the mussel body upon uptake. MP exposure also increased the global DNA methylation levels (i.e., an epigenetic signature), expression of the microbiota immunity-related toll-like receptor gene, and alteration of the gut microbial composition in the mussel. These findings indicated that MPs of different shapes and sizes at different concentrations can alter the bioaccumulation sensitivity of mussels according to the exposure periods, and the balance of gut immunity and epigenetic process. Furthermore, our results demonstrated that MPs of different shapes, particularly fiber types, can undergo morphological modification in mussel tissues, thus posing a hazardous threat.

논문정보

형식Research article
게재일2023년 10월 (BRIC 등록일 2023-10-24)
연구진국내 연구진
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