Journal
ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
Volume 87, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.etap.2021.103723
Keywords
Cadmium; Zebrafish embryo; Toxicity; Development
Funding
- Ministry of Education and Science of Republic of Serbia [175081]
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Research shows that exposure to cadmium in early zebrafish development leads to hatching delays and morphological abnormalities, indicating significant effects of toxic metals on embryological processes.
Living organisms are commonly exposed to cadmium and other toxic metals. A vast body of research has shown the significant effects of these toxic metals on developmental processes. In order to study the role of toxic metals on early developmental stages of eukaryotes, we explored the effect of cadmium (Cd2+) contaminant on zebrafish. Thus, zebrafish embryos were exposed to 3 mg/L (16.7 mu M) Cd2+ for 96 h and imaged every 24 h from the exposure onwards. Hatching rates of the eggs were determined at 72 h, followed by analyses at 96 h for: survival rate, morphometrical factors, and functional parameters of the cardiovascular system. Interestingly enough, significant hatching delays along with smaller cephalic region and some morphological abnormalities were observed in the treatment group. Moreover, substantial changes were noticed in the length of notochord and embryo, absorption of yolk sac with shorter extension, area of swimming bladder, as well as pericardium sac after Cd2+ treatment. Cadmium also caused significant abnormalities in heart physiology which could be the leading cause of mentioned morphological deformities. Herein, our results shine light on systematic acute embryological effects of cadmium in the early development of zebrafish for the first time.
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