Alterations induced by titanium dioxide nanoparticles (nano-TiO2) in fertilization and embryonic and larval development of the tropical sea urchin Lytechinus variegatus

Autor(es)

Palmeira-Pinto, L. ; Emerenciano, A. K. ; Bergami, E. ; Joviano, W. R. ; Rosa, A. R. ; Neves, C. L. ; Corsi, I. ; Marques-Santos, L. F. ; Silva, J. R. M. C.

• Tipo de documento: Artigo Científico
• Fonte: MARINE ENVIRONMENTAL RESEARCH; v. 188, p. 10-pg., 2023-05-09.

Resumo

The release of nanomaterials into the environment is the cause of an emerging concern. Titanium dioxide nanoparticles (nano-TiO2) among the most produced nanomaterials, has been documented in marine coastal areas posing a threat on marine biota. Sea urchin embryos are recognized as suitable bioindicators in ecological risk assessment and recently for nanomaterials. This study investigated the impact of nano-TiO2 on fertilization, embryonic and larval development of the tropical sea urchin Lytechinus variegatus in a range of concentrations (0.005-5 mu g/mL) which includes environmentally relevant ones. The behavior of nano-TiO2 in tropical natural seawater was determined by dynamic light scattering (DLS) and toxicity was evaluated through fertilization and embryotoxicity tests, and morphological/morphometric analyses of sea urchin's larvae. Limited toxicity was recorded for nano-TiO2 in tropical sea urchin embryos and larvae, except for effects at the gastrula stage at 0.005 mu g/mL. Large agglomerates of nano-TiO2 (5 mu g/mL) were observed adhering onto sea urchin larvae thus probably preventing nanoparticles uptake at the highest concentrations (>0.005 mu g/mL). Environmental levels of nano-TiO2 are able to cause toxicity on tropical sea urchin L. variegatus embryos with potential consequences on populations and their ecological role in tropical coastal areas. (AU)

• Processo FAPESP: 17/25568-0 - Avaliação de alterações morfológicas e moleculares induzidas por nanopartículas de dióxido de titânio (nano-TiO2) em embriões do ouriço-do-mar tropical Lytechinus variegatus (Lamarck, 1816)
• Beneficiário: Letícia Palmeira Pinto
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 18/14086-8 - Aspectos Toxicológicos dos Efeitos de Nanopartículas de Dióxido de Titânio (nano-TiO2) em Invertebrados Marinhos (AToxInver-TiO2)
• Beneficiário: José Roberto Machado Cunha da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular