Hypoxia is a worldwide environmental problem in marine ecosystems, leading to serious declines in fishery production over large areas. Our previous studies demonstrated that hypoxia is an endocrine disruptor which can cause reproductive impairment through the regulation of miRNAs, suggesting the functional role of miRNAs in reproductive systems in response to hypoxia. In this study, we used small RNA sequencing to determine the change in miRNA profile in ovary of marine medaka Oryzias melastigma under hypoxic stress. A total of 509 miRNAs were found in the ovary of marine medaka, in which, 33 and 10 miRNAs were found to be statistically significant upregulated and downregulated under hypoxia, respectively. Bioinformatics analysis highlighted that a large number of hypoxia-suppressed miRNAs that target a variety of steroidogenic enzymes including steroidogenic acute regulatory protein, aromatase, and 17-alpha-monooxygenase. Also, estrogen receptor 2 and androgen receptor were found to be targeted by hypoxia-responsive miRNAs. For the first time, our results showed that hypoxia may upregulate specific steroidogenic enzymes and hormone receptors through actions of miRNA, and hence provide a novel mechanism for the observed female reproductive impairment caused by hypoxia.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.aquatox.2015.12.012 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Burnt Plastic (Pyroplastic) from the M/V Ship Fire and Plastic Spill Contain Compounds That Activate Endocrine and Metabolism-Related Human and Fish Transcription Factors.
Environ Health (Wash)
January 2025
Department of Biology, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, United States.
In May 2021, the M/V ship fire disaster led to the largest maritime spill of resin pellets (nurdles) and burnt plastic (pyroplastic). Field samples collected from beaches in Sri Lanka nearest to the ship comprised nurdles and pieces of pyroplastic. Three years later, the toxicity of the spilled material remains unresolved.
View Article and Find Full Text PDFSunlight-mediated environmental risks of tinidazole in seawater: A neglected ocular toxicity of photolysis mixtures.
J Hazard Mater
January 2025
Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China; State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen 361102, China. Electronic address:
Tinidazole (TNZ), a common nitroimidazole antibiotic, is pervasive in aquatic ecosystems, posing potential threats to marine organisms. The environmental fate of TNZ, particularly under solar irradiation, and the associated secondary risks are not well characterized. Herein, the photochemical reactivity of TNZ and four other typical nitroimidazoles (i.
View Article and Find Full Text PDFOsmoregulation affects elimination of microplastics in fish in freshwater and marine environments.
Sci Total Environ
January 2025
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8563, Chiba, Japan; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa 277-8564, Chiba, Japan.
In recent decades, microplastics (MPs) have emerged as one of the biggest environmental challenges in aquatic environments. Ingestion and toxicity of MPs in seawater (SW) and freshwater (FW) fish have been studied extensively both in field and laboratory settings. However, the basic mechanism of how fish deal with MPs in SW and FW remains unclear, although physiological conditions of fish differ significantly in the two environments.
View Article and Find Full Text PDFTemperature-dependent toxicity and mechanisms of florfenicol on the embryonic development of marine medaka (Oryzias melastigma).
Ecotoxicol Environ Saf
January 2025
Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, Shantou University, Shantou 515063, China; Guangdong Engineering Technology Research Center of Offshore Environmental Pollution Control, Shantou University, Shantou 515063, China. Electronic address:
The extensive use of antibiotics and their persistence in the environment have seriously threatened marine ecosystems in recent years. The frequent occurrence of extreme weather due to climate change has also increased the uncertainty of effective toxicity identification and risk assessment of the chemicals of concern. This study aimed to investigate the toxic effects and potential mechanisms of florfenicol (0.
View Article and Find Full Text PDFArsenite-induced liver apoptosis via oxidative stress and the MAPK signaling pathway in marine medaka.
Aquat Toxicol
December 2024
Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; Sanya Institute of Ocean Eco-Environmental Engineering, Sanya 572025, China. Electronic address:
Arsenic (As) is widely recognized for its hazards to aquatic organisms; however, its toxicological impacts on apoptosis in marine fish remain inadequately explored. This study investigated the effects of in vivo dietary exposure to 50 or 500 mg/kg AsIII (as NaAsO) over 28 days in marine medaka, alongside in vitro exposure to 50-750 μg/L AsIII for 48 h in a hepatic cell line derived from marine medaka, to elucidate the toxicity and underlying molecular mechanisms. In vivo, As significantly accumulated in liver tissue (1.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!