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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 PDFEffect of human chorionic gonadotropin on oocyte maturation and developmental competence in buffalo.
Theriogenology
December 2024
Department of Theriogenology, University of Veterinary and Animal Sciences, Outfall Road, Lahore, 54000, Pakistan. Electronic address:
We hypothesized that human chorionic gonadotropic (hCG) could replace LH in the maturation media for buffalo oocytes, and hCG administration before ovum pick-up (OPU) enhances in-vitro development of buffalo oocytes. Objectives were 1) to investigate the effect of hCG supplementation on nuclear maturation, oocyte development, and granulosa cell mRNA abundance of genes related to growth and antioxidant pathways and 2) to determine the effect of hCG administration before OPU on in-vitro oocyte development. In Experiment 1, buffalo oocytes retrieved from slaughterhouse ovaries were maturated in the media supplemented with 0.
View Article and Find Full Text PDFEffects of minipuberty disruption on the expression of sexual behavior in female mice.
Sci Rep
December 2024
Sorbonne Université, CNRS UMR8246, INSERM U1130, Neuroscience Paris Seine - Institut de Biologie Paris Seine, Paris, France.
Sex steroids influence early organization of neural structures involved in expression of sexual behavior. A critical perinatal period during which testosterone surges occur has been identified in male rodents. Data are lacking for females, whose ovarian activity starts later in the postnatal period.
View Article and Find Full Text PDFProlactin locally mediates follicular atresia in hyperprolactinemic vizcachas (Rodentia, Chinchillidae).
Comp Biochem Physiol A Mol Integr Physiol
February 2025
Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Hidalgo 775, C1405BCK Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina. Electronic address:
Infertility in hyperprolactinemic females is attributed to the dysregulation of GnRH release, subsequently affecting gonadotropin levels, and ultimately leading to anovulation. However, in addition to the hypothalamus, prolactin receptor (PRLR) is expressed in ovaries as well, suggesting potential local effects of PRL in cases of hyperprolactinemia. We have developed an experimental model of sulpiride (SPD)-induced hyperprolactinemia using a wild rodent, the plains vizcacha, and studied the implications of pharmacological PRL levels on folliculogenesis and steroid production.
View Article and Find Full Text PDFSingle-cell transcriptomics link gene expression signatures to clinicopathological features of gonadotroph and lactotroph PitNET.
J Transl Med
November 2024
Department of Paediatric Haematology and Oncology, University Children's Hospital Münster, Albert-Schweitzer-Campus 1, 48149, Münster, Germany.
Background: Pituitary neuroendocrine tumors (PitNET) are among the most common intracranial tumors. Despite a frequent benign course, aggressive behavior can occur. Tumor behavior is known to be under the influence of the tumor microenvironment (TME).
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