effects of short-term exposure to sublethal concentrations of silver nanoparticles on histopathology and electron microscope ultrastructure of zebrafish (danio rerio) gills

Authors

برهان منصوری

borhan mansouri phd student of ecotoxicology, student research committee, kurdistan university of medical sciences, sanandaj, iran. سید علی جوهری

seyed ali johari department of fisheries, university of kurdistan, kurdistan, sanandaj, iran.

abstract

background: the increasing use of nanomaterials and nanoproducts has increased the possibility of contamination of the environment, which may have adverse effects on different organisms. the aim of this study was to evaluate the effects of silver nanoparticles on histopathology and gill ultrastructure of zebrafish (danio rerio) under laboratory conditions. methods: zebrafish were exposed to four concentrations of silver nanoparticles (0.0015, 0.00375, 0.0075, and 0.015 mg/l) for a period of 4 days. gill ultrastructure and histopathological changes were studied using scanning electron microscope and haematoxylin - eosin staining. results: exposure to silver nanoparticles significantly (p < 0.001) increased the diameter of gill filaments and secondary lamellae, while silver nanoparticles significantly reduced the length of the secondary gills in zebrafish. moreover, other changes such as vacuolization, dilated and clubbed tips, hyperplasia, edema, fusion, swelling of mucocytes, hypertrophy, and necrosis were observed. the effects of silver nanoparticles in zebrafish gills were dose dependent. conclusion: based on the adverse effects of agnps on zebrafish gills, silver nanoparticle solutions can be hazardous pollutants for the environment.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Effects of Short-Term Exposure to Sublethal Concentrations of Silver Nanoparticles on Histopathology and Electron Microscope Ultrastructure of Zebrafish (Danio Rerio) Gills

Background: The increasing use of nanomaterials and nanoproducts has increased the possibility of contamination of the environment, which may have adverse effects on different organisms. The aim of this study was to evaluate the effects of silver nanoparticles on histopathology and gill ultrastructure of zebrafish (Danio rerio) under laboratory conditions. Methods: Zebrafish were exposed to ...

full text

the effects of keyword and context methods on pronunciation and receptive/ productive vocabulary of low-intermediate iranian efl learners: short-term and long-term memory in focus

از گذشته تا کنون، تحقیقات بسیاری صورت گرفته است که همگی به گونه ای بر مثمر ثمر بودن استفاده از استراتژی های یادگیری لغت در یک زبان بیگانه اذعان داشته اند. این تحقیق به بررسی تاثیر دو روش مختلف آموزش واژگان انگلیسی (کلیدی و بافتی) بر تلفظ و دانش لغوی فراگیران ایرانی زیر متوسط زبان انگلیسی و بر ماندگاری آن در حافظه می پردازد. به این منظور، تعداد شصت نفر از زبان آموزان ایرانی هشت تا چهارده ساله با...

15 صفحه اول

Sublethal Effects of Cadmium Chloride to Testis of Zebrafish (Danio rerio)

Cadmium (Cd) is one of the most toxic environmental heavy metals to organisms. The prominent toxic effects of Cd on reproductive organs are very well known. Gonad histopathology is a valuable tool for the assessment of endocrine disruption compounds EDCs effects on fish. The aim of this study was to evaluate the reproductive toxicity of cadmium chloride (CdCl2) on histopathology of Zebrafish (D...

full text

Histopathological evaluation of zebrafish (Danio rerio) larvae following embryonic exposure to MgO nanoparticles

The aim of this study was to investigate the histopathological changes in zebrafish larvae following embryonic exposure to nanoparticles of magnesium oxide (MgONPs). The toxicity of metal oxide nanoparticles is attracting increasing attention. Among these nanomaterials, MgONPs are particularly interesting as a low cost and environmentally-friendly material. Histological investigations are used ...

full text

Histopathological evaluation of zebrafish (Danio rerio) larvae following embryonic exposure to MgO nanoparticles

The aim of this study was to investigate the histopathological changes in zebrafish larvae following embryonic exposure to nanoparticles of magnesium oxide (MgONPs). The toxicity of metal oxide nanoparticles is attracting increasing attention. Among these nanomaterials, MgONPs are particularly interesting as a low cost and environmentally-friendly material. Histological investigations are used ...

full text

Effects of subchronic exposure to atrazine on zebrafish (Danio rerio).

The aim of this study was to investigate the effects of subchronic exposure to atrazine on fish growth and the development of histopathological changes in selected organs (gill, kidney, liver) in Danio rerio. Juvenile growth tests were performed on D. rerio according to OECD method No. 215. For 28 days, fish at an initial age of 30 days were exposed to the environmental atrazine concentration c...

full text

My Resources

Save resource for easier access later


Journal title:
iranian journal of toxicology

جلد ۱۰، شماره ۱، صفحات ۱۵-۲۰

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023