PMID- 33069947 OWN - NLM STAT- MEDLINE DCOM- 20210108 LR - 20210108 IS - 1090-2414 (Electronic) IS - 0147-6513 (Linking) VI - 208 DP - 2021 Jan 15 TI - Inhibition in growth and cardiotoxicity of tris (2-butoxyethyl) phosphate through down-regulating Wnt signaling pathway in early developmental stage of zebrafish (Danio rerio). PG - 111431 LID - S0147-6513(20)31268-9 [pii] LID - 10.1016/j.ecoenv.2020.111431 [doi] AB - As a common organophosphorus flame retardant, tris (2-butoxyethyl) phosphate (TBOEP) is detected in water environment and aquatic animals extensively. Despite previous researches have reported the developmental toxicity of TBOEP in zebrafish (Danio rerio) larvae, few research focused on its underlying mechanisms. In this study, zebrafish embryos were exposed to 0, 20, 200, 1000 and 2000 microg/L TBOEP from 2 until 120 h post-fertilization (hpf) to determine potential mechanisms of developmental toxicity of this compound. Early developmental stage parameters such as body length, survival rate, hatching rate and heart rate were decreased, while malformation rate was ascended. Quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay was carried out at 12, 24, 72 and 120 hpf to demonstrate alterations in expression of genes of Wnt signaling pathway. The results indicated that axin1 was significantly up-regulated, while beta-catenin, pkc and wnt11 were down-regulated. Correlation analysis indicated that expression of these genes was significantly correlated with body length. Furthermore, apoptosis was detected in heart region by acridine orange (AO) staining and terminal deoxynucleotide transferase-mediated deoxy-UTP nick end labeling (TUNEL) assay. In addition, at 120 hpf, occurrence of oxidative stress was observed in zebrafish larvae. Moreover, 6-Bromoindirubin-3'-oxime (BIO), an activator of Wnt pathway, was found to alleviate the inhibiting effects of TBOEP on zebrafish growth. The overall outcomes offered novel viewpoints in toxic effects of TBOEP, and down-regulating Wnt signaling pathway were able to reveal some potential mechanisms of developmental toxicity of TBOEP in zebrafish larvae. CI - Copyright (c) 2020 Elsevier Inc. All rights reserved. FAU - Xiong, Hao AU - Xiong H AD - College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China. FAU - Huang, Yangyang AU - Huang Y AD - College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China. FAU - Mao, Yuchao AU - Mao Y AD - College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China. FAU - Liu, Chunsheng AU - Liu C AD - College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China; Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China. FAU - Wang, Jianghua AU - Wang J AD - College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China; Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China. Electronic address: whtjwjh@163.com. LA - eng PT - Journal Article DEP - 20201016 PL - Netherlands TA - Ecotoxicol Environ Saf JT - Ecotoxicology and environmental safety JID - 7805381 RN - 0 (Flame Retardants) RN - 0 (Organophosphates) RN - 0 (Organophosphorus Compounds) RN - 0 (Phosphates) RN - 0 (Plasticizers) RN - 0 (Water Pollutants, Chemical) RN - RYA6940G86 (tris(2-butoxyethyl) phosphate) SB - IM MH - Animals MH - Cardiotoxicity MH - Down-Regulation MH - Embryo, Nonmammalian/drug effects MH - Flame Retardants/metabolism MH - In Situ Nick-End Labeling MH - Larva/drug effects MH - Organophosphates/metabolism MH - Organophosphorus Compounds/metabolism/*toxicity MH - Phosphates/metabolism MH - Plasticizers/*toxicity MH - Water Pollutants, Chemical/metabolism/*toxicity MH - Wnt Signaling Pathway/physiology MH - Zebrafish/metabolism/*physiology OTO - NOTNLM OT - Cardiotoxicity OT - Developmental toxicity OT - Oxidative stress OT - Tris (2-butoxyethyl) phosphate OT - Wnt signaling pathway OT - Zebrafish larvae EDAT- 2020/10/19 06:00 MHDA- 2021/01/09 06:00 CRDT- 2020/10/18 20:27 PHST- 2020/05/19 00:00 [received] PHST- 2020/09/21 00:00 [revised] PHST- 2020/09/27 00:00 [accepted] PHST- 2020/10/19 06:00 [pubmed] PHST- 2021/01/09 06:00 [medline] PHST- 2020/10/18 20:27 [entrez] AID - S0147-6513(20)31268-9 [pii] AID - 10.1016/j.ecoenv.2020.111431 [doi] PST - ppublish SO - Ecotoxicol Environ Saf. 2021 Jan 15;208:111431. doi: 10.1016/j.ecoenv.2020.111431. Epub 2020 Oct 16.