Rita António Santos

Ms. Rita António Santos

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16 May 2025 in Applied Sciences
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Isabel GaivãoIsabel Gaivão
Isabel Gaivão
RSRita António Santos
Rita António Santos
TMTetiana Morozova
Tetiana Morozova
VTVolodymye Tkach
Volodymye Tkach
Bisphenol A (BPA) is one of the most produced compounds worldwide. It acts as an endocrine disruptor and can cause adverse effects in the body, even at low-dose exposures. By interacting with estrogen receptors, it can play an important role in the pathogenesis of several endocrine diseases, such as infertility, hormone-dependent tumours and various metabolic disorders. Exposure in humans, especially early in life, is of particular concern, since it can have a big impact on an individual’s development and growth. The objective of this study was to evaluate, in vivo, the genotoxicity of BPA and its effects on longevity, prolificacy and behaviour in Drosophila melanogaster. To evaluate the biological and behavioural effects, flies were crossed and subjected to different concentrations of BPA (0.5 mM, 1 mM, 2 mM, 5 mM and 10 mM) in Drosophila instant “Carolina” medium hydrated with the BPA solution for 3 days, and then transferred to a non-treated medium, where they continued to lay eggs. This procedure was repeated to obtain the F2 generation. To evaluate genotoxicity, the somatic mutation and recombination test (SMART) and Comet assays were performed. In these cases, higher concentrations of BPA were chosen (1 mM, 10 mM, 20 mM and 50 mM). The results showed that this compound caused changes in longevity and prolificacy, and that these changes also affected subsequent generations. They also showed that BPA affected Drosophila’s behaviour and social interaction, but at the exposure levels investigated here, it did not cause significant genotoxic effects.

6 April 2021 in The European Journal of Contraception & Reproductive Health Care
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Journal Article
Open access
MAMaria Inês Alfaiate
Maria Inês Alfaiate
RSRita António Santos
Rita António Santos
ASAndreia Filipa Silva
Andreia Filipa Silva
ASAna Paula SOUSA
Ana Paula SOUSA
TSTeresa Santos
Teresa Santos
RTRenata Tavares
Renata Tavares
Spermicides have been identified as a potentially attractive alternative to hormonal contraceptives and/or intrauterine devices. Thus, this study aimed evaluating the efficacy and local tolerance o...