Related Experiment Video
Updated: May 9, 2026
08:16
Detection of G Protein-coupled Receptor Expression in Mouse Vagal Afferent Neurons using Multiplex In Situ Hybridization
Published on: September 20, 2021
Estrogen Receptor Expression in GnRH Neurons: Back to the Future.
Ji-Eun Oh1, Haoyun Li1, Mary Bunnell1
1Department of Comparative Biosciences, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, 2001 South Lincoln Avenue, Urbana, IL 61802, USA.
Biology of Reproduction
|May 7, 2026
Summary
Estrogen receptors in gonadotropin-releasing hormone (GnRH) neurons are dynamically expressed and vary by species. This study reveals complex estrogen signaling in reproductive regulation, often indirect.
Area of Science:
- Neuroendocrinology
- Reproductive Biology
- Genomics
Background:
- Estrogen feedback in the hypothalamic-pituitary-gonadal (HPG) axis is crucial for reproductive function.
- Kisspeptin neurons are key mediators of estrogen feedback to gonadotropin-releasing hormone (GnRH) neurons.
- The precise role and expression of estrogen receptors within GnRH neurons remain unclear.
Purpose of the Study:
- To systematically analyze transcriptomic data for estrogen receptor expression in GnRH neurons across development and species.
- To understand the direct and indirect mechanisms of estrogen action on GnRH neurons.
Main Methods:
- Comprehensive analysis of single-cell and single-nucleus RNA-sequencing (sc/snRNA-seq) datasets.
- Inclusion of data from mouse embryogenesis to adulthood, and cross-species datasets (rat, squirrel, pig, human).
- Pseudotime analysis to assess developmental trajectories of estrogen receptor expression.
Main Results:
- Esr1 transcripts were more frequent than Esr2 in adult mouse GnRH neurons, with increased Esr1+Gnrh1+ cells post-puberty.
- Esr2 detection was minimal across mouse developmental stages.
- Cross-species analysis showed species-specific patterns of estrogen receptor expression in GnRH neurons.
Conclusions:
- Estrogen signaling in GnRH neurons is heterogeneous and developmentally regulated.
- Estrogen may influence reproductive function through both direct and indirect pathways involving upstream neurons.
- Provides a transcriptomic framework for studying estrogen receptor roles in GnRH neurons.
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