PMID- 35597397 OWN - NLM STAT- MEDLINE DCOM- 20220615 LR - 20220615 IS - 1095-9947 (Electronic) IS - 1050-4648 (Linking) VI - 126 DP - 2022 Jul TI - Toxic effects of polystyrene nanoplastics and polybrominated diphenyl ethers to zebrafish (Danio rerio). PG - 21-33 LID - S1050-4648(22)00266-2 [pii] LID - 10.1016/j.fsi.2022.05.025 [doi] AB - Nanoplastics (NPs) are good carriers of persistent organic pollutants (POPs) such as polybrominated diphenyl ethers (PBDEs), and can alter their bioavailability and toxic impacts to aquatic organisms. This study highlights the single and combined toxic effects of polystyrene nanoplastics (PS-NPs) and 2,2',4,4'-tetrabromodiphenyl ether (BDE-47, one of the dominant congeners of PBDEs) on zebrafish embryos after an exposure duration of up to 120 hpf. Results showed that PS-NPs and BDE-47 co-exposure exacerbated the morphological deformities in terms of pericardial edema, yolk sac edema and curved tail in zebrafish larvae. Compared to BDE-47 single exposure, the combined exposure caused lower survival rates, shorter body lengths, and accelerated spontaneous movements. Further, PS-NPs were quickly aggregated on the surface of the embryonic chorions covered almost the entire membrane at 12 and 48 hpf, and concentration dependent accumulation was also found in the brain, mouth, trunk, gills, heart, liver and gastrointestinal tract at the larval stages. During the recovery period (7 days), PS-NPs were released from all the organs, with the highest elimination from the gastrointestinal tract. Histopathological examination revealed that co-exposure caused greater damage to retinal structures, muscle fibers and cartilage tissues. Responses of hypothalamic-pituitary-thyroid axis (CRH, TSHbeta, NIS, TTR, Dio2, TG, TRalpha and TRbeta) and reproduction (Esr2 and Vtg1) related genes were also investigated, and results showed that the co-exposure induced more significant upregulated expressions of TSHbeta, TG, Doi 2, and TRbeta, compared to BDE-47 single exposure. In conclusion, co-exposure to NPs and BDE-47 exacerbated developmental and thyroid toxicity in zebrafish, generally elucidating the toxicological effects mediated by complex chemical interactions between NPs with POPs in the freshwater environment. CI - Copyright (c) 2022 Elsevier Ltd. All rights reserved. FAU - Wang, Qiuping AU - Wang Q AD - College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China. FAU - Li, Yizheng AU - Li Y AD - College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China. FAU - Chen, Yurou AU - Chen Y AD - College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China. FAU - Tian, Liyan AU - Tian L AD - College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China. FAU - Gao, Dandan AU - Gao D AD - College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China. FAU - Liao, Hongping AU - Liao H AD - College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China. FAU - Kong, Chunmiao AU - Kong C AD - College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China. FAU - Chen, Xikun AU - Chen X AD - College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China. FAU - Junaid, Muhammad AU - Junaid M AD - College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China. FAU - Wang, Jun AU - Wang J AD - College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China; Institute of Eco-Environmental Research, Guangxi Academy of Sciences, Nanning, 530007, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou, 510006, China. Electronic address: wangjun2016@scau.edu.cn. LA - eng PT - Journal Article DEP - 20220519 PL - England TA - Fish Shellfish Immunol JT - Fish & shellfish immunology JID - 9505220 RN - 0 (Halogenated Diphenyl Ethers) RN - 0 (Microplastics) RN - 0 (Polystyrenes) RN - 0 (Water Pollutants, Chemical) SB - IM MH - Animals MH - Embryo, Nonmammalian MH - *Halogenated Diphenyl Ethers/metabolism/toxicity MH - Larva/genetics MH - Microplastics/toxicity MH - Polystyrenes/toxicity MH - *Water Pollutants, Chemical/metabolism/toxicity MH - Zebrafish/genetics OTO - NOTNLM OT - BDE-47 OT - Developmental impacts OT - Hypothalamic-pituitary-thyroid axis OT - Polystyrene nanoplastics OT - Zebrafish EDAT- 2022/05/22 06:00 MHDA- 2022/06/16 06:00 CRDT- 2022/05/21 19:25 PHST- 2022/04/26 00:00 [received] PHST- 2022/05/11 00:00 [revised] PHST- 2022/05/12 00:00 [accepted] PHST- 2022/05/22 06:00 [pubmed] PHST- 2022/06/16 06:00 [medline] PHST- 2022/05/21 19:25 [entrez] AID - S1050-4648(22)00266-2 [pii] AID - 10.1016/j.fsi.2022.05.025 [doi] PST - ppublish SO - Fish Shellfish Immunol. 2022 Jul;126:21-33. doi: 10.1016/j.fsi.2022.05.025. Epub 2022 May 19.