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Collado Guirao, Paloma

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0000-0002-2925-6806
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Collado Guirao
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Paloma
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Autor: Collado Guirao, Paloma × Fecha de finalización: 2019 ×

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    Exposure to increased levels of estradiol during development can have long-term effects on the response to undernutrition in female rats
    (Taylor and Francis Group, 2016-11) Díaz González, Francisca; Chowen, Julie A.; Pino Osuna, María José; Carrillo Urbano, Beatriz; Collado Guirao, Paloma
    Objectives: Undernutrition during development alters the expression of peptides that control energy expenditure and feeding behavior. Estrogens can also modulate these peptides. Here we analyzed whether early postnatal administration of estradiol modulates the effects of undernutrition on neuroendocrine parameters in adult female Wistar rats. Methods: Control rats were fed a control diet. Undernourished pups were submitted to a restricted diet with half of the undernourished rats receiving 0.4 mg/kg s.c. of estradiol benzoate (EB) from postnatal day (P) 6 until P13. Quantitative real-time PCR was performed to determine expression in the hypothalamus of Agouti-related peptide (AgRP), proopiomelanocortin (POMC), neuropeptide Y (NPY) and cocaine- and amphetamine-regulated transcript (CART). Plasma estradiol, testosterone and adiponectin levels were measured by ELISA. Total and acylated ghrelin levels were measured in plasma by RIA. Results: Undernourishment decreased body weight, fat mass, plasma leptin and insulin levels and hypothalamic POMC mRNA levels. An increase in orexigenic signals AgRP and NPY mRNA levels, and in plasma adiponectin levels were found in undernourished animals. Early postnatal treatment with EB to undernourished female rats reversed the effects of undernutrition on adult hypothalamic POMC mRNA levels. In addition, neonatal EB treatment to undernourished females significantly decreased adult plasma testosterone, estradiol and acylated ghrelin levels. Discussion: Our results suggest that increased estradiol during a critical period of development has the capacity to modulate the alterations that undernutrition produces on energy metabolism.