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Exposure to environmentally relevant levels of DEHP during development modifies the distribution and expression patterns of androgen receptors in the anterior pituitary in a sex-specific manner.
Chemosphere
January 2025
Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Instituto de Investigaciones en Ciencias de La Salud (INICSA), Córdoba, Argentina; Universidad Nacional de Córdoba, Facultad de Ciencias Médicas, Centro de Microscopía Electrónica. Córdoba, Argentina. Electronic address:
DEHP is a prevalent phthalate with wide industrial applications and well-documented endocrine-disrupting effects, including the potential disruption of AR signaling in different tissues. The present study aimed to investigate the effects of gestational and lactational exposure to environmentally relevant DEHP concentrations on AR expression and subcellular localization in the pituitary gland, the master endocrine organ, with a focus on gonadotroph cells by in vivo and in vitro approaches. After DEHP exposure during gestation and lactation, a sex-specific modulation was detected in AR-positive pituitary cells and AR protein expression as assessed through flow cytometry and western blot.
View Article and Find Full Text PDFThe silent pandemic of stress: impact on menstrual cycle and ovulation.
Stress
December 2025
Division of General Internal Medicine, Mayo Clinic, Jacksonville, Florida, USA.
In the current age of technological advancement, stress has emerged as a silent pandemic affecting individuals, especially young generations, globally. Factors such as increased competition, social pressures fueled by social media and smartphones, and a sense of diminished control in the face of modern challenges contribute to rising stress levels. In addition to the negative implications on mental well-being, stress affects physiological processes such as the menstrual cycle.
View Article and Find Full Text PDFGonadotropic axis following endoscopic surgery for pituitary neuroendocrine tumor in patients of reproductive age.
Ann Endocrinol (Paris)
January 2025
Department of Endocrinology, Diabetes and Nutrition, Nancy Regional University Hospital, Nancy, France.
Purpose: Pituitary neuroendocrine tumor (PitNET), excluding prolactinoma, often requires endoscopic endonasal surgery (EES). Identifying predictive factors for complications, and particularly rare ones such as hypogonadotropic hypogonadism (HH) that may affect fertility, is challenging. This study investigated de-novo postoperative HH and its potential impact on fertility.
View Article and Find Full Text PDFGnRH pulse generator activity in mouse models of polycystic ovary syndrome.
Elife
January 2025
Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom.
Article Synopsis
- One in ten women of reproductive age have PCOS, characterized by subfertility, high LH levels, and potential dysfunction in the kisspeptin neurons that regulate GnRH.
- Researchers studied the GnRH pulse generator in two mouse models of PCOS: the peripubertal androgen (PPA) model showed fewer synchronized neuron events, while the prenatal androgen (PNA) model revealed variable GnRH activity but cyclical patterns indicating complexity.
- Findings indicate that in the PNA model, ARN neurons had increased activity during specific stages and less sensitivity to progesterone, highlighting the need to understand GnRH regulation in PCOS-related conditions.
The satiety hormone cholecystokinin gates reproduction in fish by controlling gonadotropin secretion.
Elife
December 2024
Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food, and Environment, Hebrew University of Jerusalem, Rehovot, Israel.
Life histories of oviparous species dictate high metabolic investment in the process of gonadal development leading to ovulation. In vertebrates, these two distinct processes are controlled by the gonadotropins follicle-stimulating hormone (FSH) and luteinizing hormone (LH), respectively. While it was suggested that a common secretagogue, gonadotropin-releasing hormone (GnRH), oversees both functions, the generation of loss-of-function fish challenged this view.
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