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Breast milk is regarded as an ideal source of nutrients for the growth and development of neonates, but it can also be a potential source of pollutants. Mothers can be exposed to different contaminants as a result of their lifestyle and environmental pollution. Mercury (Hg) and arsenic (As) could adversely affect the development of fetal and neonatal nervous system. Some fish and shellfish are rich in selenium (Se), an essential trace element that forms part of several enzymes related to the detoxification process, including glutathione S-transferase (GST). The goal of this study was to determine the interaction between Hg, As and Se and analyze its effect on the activity of GST in breast milk. Milk samples were collected from women between day 7 and 10 postpartum. The GST activity was determined spectrophotometrically; total Hg, As and Se concentrations were measured by atomic absorption spectrometry. To explain the possible association of Hg, As and Se concentrations with GST activity in breast milk, generalized linear models were constructed. The model explained 44% of the GST activity measured in breast milk. The GLM suggests that GST activity was positively correlated with Hg, As and Se concentrations. The activity of the enzyme was also explained by the frequency of consumption of marine fish and shellfish in the diet of the breastfeeding women.
Palabras Clave: Breast milk. Generalized linear model. Glutatione S-transferase. Oxidative stress. Trace elements.
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Rocío Angélica Salinas Osornio , María Victorina Aguilar-Vilas , Antonio Becerra-Fernández , Laura González López , Blanca Miriam Torres-Mendoza
Ximena León-Lara , Ariana Vargas-Castillo , Azalia Avila-Nava , Martha Guevara-Cruz , Aurora E Serralde Zúñiga , Isabel Medina-Vera
Daniza Puca , Pamela Estay Castillo , Carina Valenzuela , Yasna Muñoz
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Aina Tomás Luiz , Gala Martín Pozuelo , Inmaculada González Navarro , Laura Elvira Torales , Helena Ponce , Rocío González Barrio , Javier García Alonso , María Jesús Periago
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José Antonio Palma-Jacinto , Isela Santiago-Roque , María del Rocío Coutiño-Rodríguez , Omar Elind Arroyo-Helguera
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