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Related Concept Videos

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Puberty is a critical phase, typically beginning between the ages of 8 and 13 in girls and 9 and 14 in boys, though timing can vary based on genetics, environmental factors, and overall health. This period is characterized by the development of secondary sexual characteristics and the attainment of reproductive potential. Endocrine changes underpin puberty, with hormonal surges of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) instigated by Gonadotropin-Releasing Hormone (GnRH)...
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The intricate hormonal interplay essential for male reproductive health begins with the release of gonadotropin-releasing hormone (GnRH) by the hypothalamus. This hormone prompts the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). LH targets the Leydig cells in the testes, stimulating them to produce and release testosterone. In concert with testosterone, FSH acts on the Sertoli cells within the seminiferous tubules to facilitate the release of...

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Related Experiment Video

Updated: Jun 13, 2026

Determination of Reproductive Competence by Confirming Pubertal Onset and Performing a Fertility Assay in Mice and Rats
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Androgen profiles during pubertal Leydig cell development in mice.

Xiufeng Wu1, Ramamani Arumugam, Ningning Zhang

  • 1Pediatric Endocrine Division, Pediatrics and Cell Biology, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, Massachusetts 01655, USA.

Reproduction (Cambridge, England)
|May 11, 2010
PubMed
Summary

Mouse Leydig cell (LC) development shows a delayed onset and accelerated maturation compared to rats. This study reveals species-specific differences in androgen production and steroidogenic enzyme expression during sexual development.

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Area of Science:

  • Reproductive Biology
  • Endocrinology
  • Developmental Biology

Background:

  • Postnatal Leydig cell (LC) development in mice is often modeled after rat development.
  • Rat Leydig cells exhibit defined hormonal profiles during maturation.
  • Understanding species-specific LC development is crucial for interpreting mouse models.

Purpose of the Study:

  • To characterize Leydig cell function and gene expression changes in mice from birth to 180 days.
  • To compare the timing of androgen production and steroidogenic capacity in mice versus rats.
  • To provide data for assessing reproductive phenotypes in genetically modified mouse models.

Main Methods:

  • Examined reproductive hormone expression (androgens, LH) from birth to 180 days in mice.
  • Quantified in vivo and in vitro androgen production by isolated Leydig cells.
  • Assessed expression of key steroidogenic enzymes (CYP11A1, CYP17A1).

Main Results:

  • Mouse Leydig cell androgen biosynthesis onset occurred at day 24, later than in rats (day 21).
  • Testosterone production peaked at day 45 in mice, then declined, unlike in rats.
  • Murine Leydig cells showed a more robust response to LH stimulation.

Conclusions:

  • Mouse Leydig cell lineage exhibits a delayed onset and accelerated maturation compared to rats.
  • Species-specific differences exist in Leydig cell differentiation, enzyme expression, and androgen production capacity.
  • These findings highlight crucial distinctions for interpreting mouse reproductive research.