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A preliminary gene expression analysis on Paracentrotus lividus embryos exposed to UVB, Cadmium and their combination.

Authors :
Bonaventura, Rosa
Zito, Francesca
Russo, Roberta
Costa, Caterina
Source :
Aquatic Toxicology. Mar2021, Vol. 232, pN.PAG-N.PAG. 1p.
Publication Year :
2021

Abstract

• A high throughput technology was applied on embryos exposed to UV, Cd and Cd/UV. • We investigated the molecular responses adopted by embryos to cope with these stressors. • The analysis of 127 transcripts highlighted the dysregulation of many genes. Paracentrotus lividus is a Mediterranean and Eastern Atlantic sea urchin species, very sensitive to chemical and physical environmental changes and widely used in eco-toxicological studies. Here, we applied a high throughput screening approach on P. lividus embryos exposed to UVB radiation (UV), Cadmium Chloride (Cd) and their combination (Cd/UV), to deeply characterize the molecular responses adopted by embryos to cope with these stressors. in vitro eco-toxicological assays were performed by exposing embryos to Cd (10−4 M) soon after fertilization, to UV (200 and 400J/m2) at early stage of development, while in co-exposure experiments, Cd-exposed embryos were irradiated with UV at 200 J/m2. By NanoString nCounter technology, custom-made probes were developed and hybridized on total RNA extracted from exposed embryos at 51h after fertilization. By in silico analyses, we selected and retrieved at the NCBI nucleotide database a panel of P. lividus transcripts encoding for many regulatory and structural proteins that we ranked in categories, i.e., Apoptosis, Biomineralization, Defense, Development, Immunity, Signaling and Transcription Factors. The analysis of 127 transcripts highlighted the dysregulation of many genes, some specifically activated to cope with stress agents, others involved in the complex molecular network of genes that regulate embryo development. We revealed the downregulation of Biomineralization and Development genes and the upregulation of Defensive genes in Cd and Cd/UV embryos. Our approach, using sea urchin embryo as an in vivo model, contributes to advance our knowledge about cellular responses to UV, Cd and their combination. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0166445X
Volume :
232
Database :
Academic Search Index
Journal :
Aquatic Toxicology
Publication Type :
Academic Journal
Accession number :
148860944
Full Text :
https://doi.org/10.1016/j.aquatox.2021.105770