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A cautionary tale: Alien prolactins may induce lesser, no, or opposite effects to homologous hormone!
J Neuroendocrinol
July 2024
Division of Biomedical Sciences, School of Medicine, University of California, Riverside, California, USA.
Cost and availability have often dictated the use of heterologous/alien prolactins in experiments, particularly in vivo. The assumption has been that what is initiated in the target cell is representative of the homologous hormone since many heterologous mammalian prolactins bind to and activate rodent receptors. Here, we examined gene expression in mouse liver in response to a 7-day treatment with recombinant mouse prolactin (mRecPRL), recombinant ovine prolactin (oRecPRL) and pituitary extract ovine prolactin (oPitPRL).
View Article and Find Full Text PDFA tale of two hierarchies: Hormonal and behavioral factors underlying sex differences in social dominance in cooperative breeding callitrichids.
Horm Behav
January 2023
Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX, USA. Electronic address:
Callitrichid primates are recognized for high levels of sociality in small groups, their great behavioral flexibility, and single-female dominant hierarchies. Previous work has highlighted that dominant, breeding callitrichids engage in behavioral and hormonal reproductive suppression of related and unrelated subordinates by both producing more offspring, having higher levels of ovulatory hormones, and accessing more sociosexual opportunities. This suppression constitutes a nexus of changes in pituitary responsiveness, ovarian cyclicity, sexual behavior, affiliation, and aggression.
View Article and Find Full Text PDFSocially Induced Infertility in Naked and Damaraland Mole-Rats: A Tale of Two Mechanisms of Social Suppression.
Animals (Basel)
November 2022
Mammal Research Institute, Department of Zoology & Entomology, University of Pretoria, Pretoria 0084, South Africa.
The naked mole-rat () and the Damaraland mole-rat () possess extreme reproductive skew with a single reproductive female responsible for reproduction. In this review, we synthesize advances made into African mole-rat reproductive patterns and physiology within the context of the social control of reproduction. Non-reproductive female colony members have low concentrations of luteinising hormone (LH) and a reduced response of the pituitary to a challenge with gonadotropin releasing hormone (GnRH).
View Article and Find Full Text PDFA tale of many tumors and one endocrine site: A case series of pituitary metastases.
Qatar Med J
September 2021
Endocrine Department, Hamad Medical Corporation, Doha, Qatar.
Background: Metastases to the pituitary gland are extremely rare with an incidence rate reported from an autopsy series of 1.8%-12%, and only 20% was diagnosed clinically. Tumors that commonly metastasize are breast and lung tumors.
View Article and Find Full Text PDFAllelic Variants in Established Hypopituitarism Genes Expand Our Knowledge of the Phenotypic Spectrum.
Genes (Basel)
July 2021
Developmental Endocrinology Unit, Laboratory of Hormones and Molecular Genetics LIM/42, Division of Endocrinology, Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo (FMUSP), Av Dr Eneas de Carvalho Aguiar, 155, 2 Andar, Bloco 6, São Paulo 05403-000, Brazil.
We report four allelic variants (three novel) in three genes previously established as causal for hypopituitarism or related disorders. A novel homozygous variant in the growth hormone gene, c.171delT (p.
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