Related Experiment Video
Updated: Aug 13, 2026
06:38
Determination of Reproductive Competence by Confirming Pubertal Onset and Performing a Fertility Assay in Mice and Rats
Published on: October 13, 2018
15.5K
Mouse Testicular Mkrn3 Expression Is Primarily Interstitial, Increases Peripubertally, and Is Responsive to LH/hCG
Sidney A Pereira1,2, Fernanda C B Oliveira1, Lydie Naulé2
1Molecular Pharmacology Laboratory, School of Health Sciences, University of Brasilia, Brasilia-DF, Brazil.
Endocrinology
|August 16, 2023
Summary
Makorin RING finger protein 3 (MKRN3) is crucial for regulating puberty onset. Its expression in testes increases post-puberty and responds to hormonal stimulation, offering insights into central precocious puberty.
Area of Science:
- Endocrinology
- Reproductive Biology
- Molecular Genetics
Background:
- Makorin RING finger protein 3 (MKRN3) inhibits gonadotropin-releasing hormone (GnRH) secretion prepubertally.
- Loss of MKRN3 function is a primary genetic cause of central precocious puberty.
- Gonads can synthesize neuropeptides and express MKRN3/Mkrn3 mRNA.
Purpose of the Study:
- Investigate the spatiotemporal expression pattern of Mkrn3 in gonads during sexual development.
- Determine the regulation of Mkrn3 in testicular compartments by gonadotropins.
Main Methods:
- Analysis of Mkrn3 mRNA expression in wild-type mouse testes and ovaries across different ages.
- In vitro studies using primary Leydig cell cultures treated with human chorionic gonadotropin (hCG).
- In vivo studies involving GnRH agonist administration in adult mice.
Main Results:
- Mkrn3 mRNA was detected in both testes and ovaries with sexually dimorphic expression.
- Testicular Mkrn3 expression peaked peripubertally and was localized mainly in the interstitial compartment.
- hCG treatment increased Mkrn3 mRNA levels in Leydig cells in a dose-dependent manner, and GnRH agonist administration affected Mkrn3 expression in vivo.
Conclusions:
- Mkrn3 is expressed in the testes, primarily in the interstitial compartment.
- Mkrn3 expression increases post-puberty and is responsive to luteinizing hormone/hCG stimulation.
- These findings contribute to understanding the role of MKRN3 in pubertal regulation and central precocious puberty.
