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Related Concept Videos

Spermatogenesis01:22

Spermatogenesis

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Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
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Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male...
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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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Testes: Gross Anatomy01:19

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The testes, also known as testicles, are the male gonads. They are housed within the scrotum, a sac-like structure located beneath the penis. The scrotum's primary role is to regulate the temperature of the testes, which is crucial for sperm production.
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The Y Chromosome Determines Maleness02:19

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The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
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Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
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Related Experiment Video

Updated: Mar 1, 2026

A Seminiferous Tubule Squash Technique for the Cytological Analysis of Spermatogenesis Using the Mouse Model
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GGNBP2 is necessary for testis morphology and sperm development.

Anqi Chen1,2, Jixi Li1, Lesheng Song1

  • 1State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai, 200433, P.R. China.

Scientific Reports
|June 9, 2017
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Summary

Gametogenetin Binding Protein 2 (GGNBP2) is crucial for male fertility. Its absence in knockout mice leads to abnormal testes morphology and lack of sperm, indicating a key role in spermatogenesis.

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Area of Science:

  • Reproductive Biology
  • Molecular Genetics
  • Cell Biology

Background:

  • Gametogenetin Binding Protein 2 (GGNBP2) is a known tumor suppressor and essential for pregnancy maintenance.
  • GGNBP2's role in spermatogenesis, despite its interaction with testicular germ cell gene Gametogenetin (GGN), remained unclear.

Purpose of the Study:

  • To investigate the function of GGNBP2 in spermatogenesis using a mouse knockout model.
  • To elucidate the specific mechanisms by which GGNBP2 influences male fertility.

Main Methods:

  • Generation and intercrossing of heterozygous GGNBP2 knockout mice.
  • Phenotypic analysis of offspring, including fertility assessment, testicular morphology, apoptosis assays, and immunohistochemical staining (SOX9, PCNA).

Main Results:

  • Homozygous GGNBP2 knockout mice exhibited significantly reduced fertility and severely reduced numbers at birth.
  • Male knockout mice displayed abnormal testicular morphology, absence of spermatozoa, and increased apoptosis.
  • SOX9-positive Sertoli cells were absent in knockout testes, and PCNA-positive cells were mislocalized.

Conclusions:

  • GGNBP2 plays a critical role in male spermatogenesis.
  • GGNBP2 is essential for the proper morphology and function of SOX9-positive Sertoli cells, which are vital for sperm development.