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Teratoma Generation in the Testis Capsule
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Testis Development.

Juho-Antti Mäkelä1, Jaakko J Koskenniemi1,2, Helena E Virtanen1

  • 1Research Centre for Integrative Physiology and Pharmacology, Institute of Biomedicine, University of Turku, Turku, Finland.

Endocrine Reviews
|December 28, 2018
PubMed
Summary
This summary is machine-generated.

Testis development relies on somatic and germ cells, with Sertoli cells guiding sperm production and Leydig cells producing androgens. Germ cells depend on somatic cells, while somatic cells can develop independently, impacting male development and fertility.

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Area of Science:

  • Reproductive biology and developmental genetics.
  • Molecular endocrinology and male reproductive health.

Background:

  • The testis performs crucial functions of sperm and androgen production, dependent on the coordinated development of somatic and germ cells.
  • Sertoli cells, directed by the Y chromosome's SRY gene, are central to orchestrating testicular development and spermatogenesis.
  • Leydig cells are responsible for androgen secretion, essential for male sexual development.

Purpose of the Study:

  • To review the differentiation processes of germ cells from primordial germ cells to spermatogonia.
  • To describe the development of supporting testicular somatic cells, including Sertoli and Leydig cells.
  • To discuss the molecular regulation of testis development, including genetic factors influencing disorders of sex differentiation.

Main Methods:

  • Review of existing scientific literature on testicular development and function.
  • Analysis of genetic programs initiated by Y chromosome genes, such as SRY.
  • Examination of the roles of Sertoli and Leydig cells in spermatogenesis and androgen production.

Main Results:

  • Testicular somatic cell development is independent of germ cells, but germ cell development is critically dependent on somatic cells.
  • Sertoli cell number dictates the capacity for sperm production, while Leydig cells ensure masculinization through androgens.
  • Cryptorchidism, the failure of testicular descent, is a common birth defect impacting spermatogenesis and is linked to disorders of sex differentiation.

Conclusions:

  • Normal testis development requires intricate interactions between somatic and germ cells, regulated by specific genetic pathways.
  • Disorders of sex differentiation arise from various genetic causes, affecting testicular development and function.
  • Understanding these molecular mechanisms is vital for addressing male infertility and developmental abnormalities.