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Adolescent exposure to tris(1,3-dichloro-2-propyl) phosphate (TCPP) induces reproductive toxicity in zebrafish through hypothalamic-pituitary-gonadal axis disruption.
Yan, Jin; Fang, Lu; Zhao, Zijia; Su, Xincong; Xi, Miaocui; Huang, Yue; Li, Jiahang; Chang, Runfeng; Zhang, Wenjun; Qian, Qiuhui; Wang, Zejun; Wang, Huili.
Afiliación
  • Yan J; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
  • Fang L; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
  • Zhao Z; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
  • Su X; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
  • Xi M; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
  • Huang Y; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
  • Li J; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
  • Chang R; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
  • Zhang W; Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
  • Qian Q; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
  • Wang Z; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
  • Wang H; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China. Electronic address: whuili@163.com.
Sci Total Environ ; 953: 176096, 2024 Nov 25.
Article en En | MEDLINE | ID: mdl-39260506
ABSTRACT
Tris(1,3-dichloro-2-propyl) phosphate (TCPP), a prevalent organophosphorus flame retardant in aquatic environments, has raised significant concerns regarding its ecological risks. This study aims to explore the impacts of TCPP on the reproductive functions of zebrafish and delineate its gender-related toxic mechanisms. By assessing the effects on zebrafish of 10 mg/L TCPP exposure from 30 to 120 days post-fertilization (dpf), we thoroughly evaluated the reproductive capability and endocrine system alterations. Our findings indicated that TCPP exposure disrupted gender differentiation in zebrafish and markedly impaired their reproductive capacity, resulting in decreased egg laying and offspring development quality. Histological analyses of gonadal tissues showed an abnormal increase in immature oocytes in females and a reduction in mature sperm count and spermatogonial structure integrity in males, collectively leading to compromised embryo quality. Additionally, molecular docking results indicated that TCPP showed a strong affinity for estrogen receptors, and TCPP-treated zebrafish exhibited imbalanced sex hormones and increased estrogen receptor expression. Alterations in genes associated with the hypothalamic-pituitary-gonadal (HPG) axis and activation of the steroidogenesis pathway suggested that TCPP targets the HPG axis to regulate sex hormone homeostasis. Tamoxifen (TAM), as a competitive inhibitor of estrogen, exhibited a biphasic effect, as evidenced by the counteraction of TCPP-induced effects in both male and female zebrafish after TAM addition. Overall, our study underscored the gender-dependent reproductive toxicity of TCPP exposure in zebrafish, characterized by diminished reproductive capacity and hormonal disturbances, likely due to interference in the HPG axis and steroidogenesis pathways. These findings emphasize the critical need to consider gender differences in chemical risk assessments for ecosystems and highlight the importance of understanding the mechanisms underlying the effects of chemical pollutants on the reproductive health of aquatic species.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Reproducción / Contaminantes Químicos del Agua / Pez Cebra / Retardadores de Llama / Sistema Hipotálamo-Hipofisario Límite: Animals Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Reproducción / Contaminantes Químicos del Agua / Pez Cebra / Retardadores de Llama / Sistema Hipotálamo-Hipofisario Límite: Animals Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos