Cellular biomarkers to elucidate global warming effects on Antarctic sea urchin Sterechinus neumayeri

Branco, Paola. Cristina; Pressinotti, Leandro Nogueira; Borges, João Carlos Shimada; Iunes, Renata Stecca; Kfoury Jr, José Roberto; da Silva, Marcos Oliveira; Gonzalez, Marcelo; dos Santos, Marinilce Fagundes; Peck, Lloyd ORCID:; Cooper, Edwin L.; da Silva, José Roberto Machado. 2012 Cellular biomarkers to elucidate global warming effects on Antarctic sea urchin Sterechinus neumayeri. Polar Biology, 35 (2). 221-229.

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Global warming is a reality and its effects have been widely studied. However, the consequences for marine invertebrates remain poorly understood. Thus, the present study proposed to evaluate the effect of elevated temperature on the innate immune system of Antarctic sea urchin Sterechinus neumayeri. Sea urchins were collected nearby Brazilian Antarctic Station ‘‘Comandante Ferraz’’ and exposed to 0 (control), 2 and 4C for periods of 48 h, 2, 7 and 14 days. After the experimental periods, coelomic fluid was collected in order to perform the following analyses: coelomocytes differential counting, phagocytic response, adhesion and spreading coelomocytes assay, intranuclear iron crystalloid and ultra structural analysis of coelomocytes. The red sphere cell was considered a biomarker for heat stress, as they increased in acute stress. Besides that, a significant increase in phagocytic indexes was observed at 2C coinciding with a significant increase of intranuclear iron crystalloid at the same temperature and same time period. Furthermore, significant alterations in cell adhesion and spreading were observed in elevated temperatures. The ultra structural analysis of coelomocytes showed no significant difference across treatments. This was the first time that innate immune response alterations were observed in response to elevated temperature in a Polar echinoid.

Item Type: Publication - Article
Digital Object Identifier (DOI):
Programmes: BAS Programmes > Polar Science for Planet Earth (2009 - ) > Ecosystems
ISSN: 0722-4060
Additional Keywords: Temperature rising, Coelomocytes, Innate immune response
Date made live: 24 Feb 2012 12:08 +0 (UTC)

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