FRCH - I+D+i - GIDTAP::Artículos en revistas

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    Embryonic shell shape as an early indicator of pollution in marine gastropods
    (2021-02-19) Primost, Mónica A.; Averbuj, Andrés; Bigatti, Gregorio; Márquez, Federico
    Gastropods shell shape has been proposed as a good indicator of environmental changes while geometric morphometric (GM) is a powerful tool to detect such changes. Shell shape pattern in adults of the marine gastropod Buccinanops deformis was proved to be correlated with imposex incidence and maritime traffic in populations of Patagonia. We explore through GM the shell shape variation of B. deformis intracapsular embryos in pre-hatching stages of development, in two populations with contrasting maritime traffic and imposex incidence. Embryonic shell shape from polluted and unpolluted areas was significantly different in apex, lateral, aperture and siphonal channel. The same shell shape pattern was observed previously in B. deformis adult specimens. Our results demonstrate that the embryonic shell shape is an early biomarker that could be used as a tool to detect the response to environmental pollution studying abundant egg capsules laid in the field but protecting reproductive adults.
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    PAHs contamination in edible gastropods from north Patagonian harbor areas
    (2018-08-10) Primost, Mónica A.; Commendatore, Marta Graciela; Torres, Pablo Javier; Bigatti, Gregorio
    PAHs are persistent pollutants released into the environment by fossil fuels burning and leak during petroleum operations. Associated with suspended particles upon entering marine ecosystem are accumulated by benthic fauna. Human exposure occurs mainly from ingestion such as gastropods consumption. The objective was to determine PAHs in sediments and in the marine gastropod Buccinanops globulosus in sites with different maritime and urban influences. In sampling sites located 20 km from the harbor, PAHs were non-detected; while in harbor gastropods, the level of PAH4 was exceeded according to international normative. Level of dibenzo[a,h]anthracene in sediments was between the ISQG and PEL. Since these are the first results of PAHs in edible gastropods in South America, we concluded that PAHs can be dangerous for consumers according to ingestion frequency. Integrative studies are necessary to evaluate the interaction among pollutants in maritime areas and the incidence in human health due to shellfish consumption.
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    RXR expression in marine gastropods with different sensitivity to imposex development
    (Nature, 2020-06-11) Giulianelli, Sebastián; Primost, Mónica A.; Lanari, Claudia; Bigatti, Gregorio
    The superposition of male sexual characteristics in female marine gastropods (imposex) represents one of the clearest ecological examples of organotin-mediated endocrine disruption. Recent evidences suggest that signaling pathways mediated by members of the nuclear receptor superfamily, RXR and PPARγ, are involved in the development of this pseudohermaphroditic condition. Here, we identifed signifcant diferences in RXR expression in two caenogastropod species from Nuevo Gulf, Argentina, Buccinanops globulosus and Trophon geversianus, which present clear contrast in imposex incidence. In addition, B. globulosus males from a polluted and an unpolluted area showed diferences in RXR expression. Conversely, PPARγ levels were similar between both analyzed species. These fndings indicate specie-specifc RXR and PPARγ expression, suggesting a major role of RXR in the induction of imposex.