Article (Scientific journals)
Role of Posterodorsal Medial Amygdala Urocortin-3 in Pubertal Timing in Female Mice.
Ivanova, Deyana; Li, XiaoFeng; Liu, Yali et al.
2022In Frontiers in Endocrinology, 13, p. 893029
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Keywords :
MePD; Ucn3; puberty; stress; Urocortins; Gonadotropin-Releasing Hormone; Luteinizing Hormone; Gonadotropin-Releasing Hormone/metabolism; Sexual Maturation; Endocrinology, Diabetes and Metabolism
Abstract :
[en] Post-traumatic stress disorder impedes pubertal development and disrupts pulsatile LH secretion in humans and rodents. The posterodorsal sub-nucleus of the medial amygdala (MePD) is an upstream modulator of the hypothalamic gonadotropin-releasing hormone (GnRH) pulse generator, pubertal timing, as well as emotional processing and anxiety. Psychosocial stress exposure alters neuronal activity within the MePD increasing the expression of Urocortin3 (Ucn3) and its receptor corticotropin-releasing factor type-2 receptor (CRFR2) while enhancing the inhibitory output from the MePD to key hypothalamic reproductive centres. We test the hypothesis that psychosocial stress, processed by the MePD, is relayed to the hypothalamic GnRH pulse generator to delay puberty in female mice. We exposed C57Bl6/J female mice to the predator odor, 2,4,5-Trimethylthiazole (TMT), during pubertal transition and examined the effect on pubertal timing, pre-pubertal LH pulses and anxiety-like behaviour. Subsequently, we virally infected Ucn3-cre-tdTomato female mice with stimulatory DREADDs targeting MePD Ucn3 neurons and determined the effect on pubertal timing and pre-pubertal LH pulse frequency. Exposure to TMT during pubertal development delayed puberty, suppressed pre-pubertal LH pulsatility and enhanced anxiety-like behaviour, while activation of MePD Ucn3 neurons reduced LH pulse frequency and delayed puberty. Early psychosocial stress exposure decreases GnRH pulse generator frequency delaying puberty while inducing anxiety-behaviour in female mice, an effect potentially involving Ucn3 neurons in the MePD.
Disciplines :
Anatomy (cytology, histology, embryology...) & physiology
Author, co-author :
Ivanova, Deyana ;  Department of Women and Children's Health, Faculty of Life Science and Medicine, King's College London, London, United Kingdom
Li, XiaoFeng;  Department of Women and Children's Health, Faculty of Life Science and Medicine, King's College London, London, United Kingdom
Liu, Yali;  Department of Assisted Reproduction, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
Mcintyre, Caitlin  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biologie de la différenciation sexuelle du cerveau ; Department of Women and Children's Health, Faculty of Life Science and Medicine, King's College London, London, United Kingdom
Fernandes, Cathy;  Social, Genetic & Developmental Psychiatry Centre, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, United Kingdom ; MRC Centre for Neurodevelopmental Disorders, King's College London, London, United Kingdom
Lass, Geffen;  Department of Women and Children's Health, Faculty of Life Science and Medicine, King's College London, London, United Kingdom
Kong, Lingsi;  Department of Women and Children's Health, Faculty of Life Science and Medicine, King's College London, London, United Kingdom
O'Byrne, Kevin T;  Department of Women and Children's Health, Faculty of Life Science and Medicine, King's College London, London, United Kingdom
Language :
English
Title :
Role of Posterodorsal Medial Amygdala Urocortin-3 in Pubertal Timing in Female Mice.
Publication date :
2022
Journal title :
Frontiers in Endocrinology
eISSN :
1664-2392
Publisher :
Frontiers, Switzerland
Volume :
13
Pages :
893029
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BBSRC - Biotechnology and Biological Sciences Research Council
MRC - Medical Research Council
Funding text :
The research project was supported by Kamprad Family Foundation for Entrepreneurship, Research and Charity (4711 01 35), and Swedish Research Council for Health, Working Life and Welfare (2019-00549).
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since 16 April 2025

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