Developmental Toxicity and Mechanism of Dibutyl Phthalate on the Development of Subintestinal Vessels in Zebrafish

Overview

Journal Sci Rep

Specialty Science

Date 2024 Nov 18

PMID 39558027

Authors

Wei Peng

Xiaokun Yi

YuYang Peng

Huiqiang Lu

Haijin Liu

Affiliations

Soon will be listed here.

Abstract

Background: The dibutyl phthalate (DBP) is a member of the phthalate family and is widely used as a plasticizer in daily life and production. However, the influence of DBP on the vascular developmental remains unclear.

Methods: In this study, we used zebrafish as a model organism to investigate the effects of DBP on vascular development in vivo. Death curves of zebrafish at different concentrations of DBP exposure and different times incubation were made firstly. Zebrafish embryos after fertilization for 5.5 h were exposed to different concentrations of DBP solution (0, 0.4, 0.8, 1.2 mg/L), the body length, yolk sac absorption area, mortality and heart rate of zebrafish were measured, and the number and area of sprouting of ventral vessels were quantified by transgenic fish system. Reactive oxygen species (ROS) in zebrafish embryos were observed by DCFH-DA staining. Super oxide dimutese (SOD) and catalase (CAT) were determined with ELISA kits.

Results: We found that DBP increased the oxidative stress level of zebrafish exposed to DBP, and the genes related to vascular development also increased. Meanwhile, the activities of SOD and CAT were greatly decreased after DBP exposure. In the rescue experiment, we found that the antioxidant astaxanthin and the small molecule VEGF inhibitor ZM-306,416 can reverse the vascular dysplasia caused by DBP.

Conclusions: DBP induced vascular developmental toxicity by enhancing oxidative stress levels, activating HIF pathway, and interfering with the expression of vascular development-related pathways in zebrafish, results in the abnormal development of the subintestinal vessels in zebrafish.

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