A culture platform to reconstitute human foetal testes†

Area of Science:

• Reproductive Biology
• Developmental Biology
• Cell Biology

Background:

• Human germ cells (hGCs) migrate to gonads early in development.
• Post-sex determination, gonadogenesis and gametogenesis proceed distinctly in males and females.
• Interactions between hGCs and Sertoli cells in male testes are poorly understood.

Purpose of the Study:

• To establish a 3D culture platform for human fetal testes (rhTestes).
• To investigate factors influencing rhTestes organization and hGC survival.
• To explore interactions between testicular cell types in vitro.

Main Methods:

• Dissociated second-trimester human fetal testes were used for reconstitution.
• The study examined the impact of stress inhibitors and cell ratios (Sertoli cells, interstitial cells) on rhTestes.
• DDX4+ hGCs were monitored for survival and location within the 3D cultures.

Main Results:

• A 3D culture system successfully reconstituted human testes (rhTestes).
• DDX4+ hGCs were observed for at least two weeks, located at the periphery of rhTestes.
• The study identified factors affecting rhTestes organization and hGC numbers.

Conclusions:

• This 3D culture platform supports human fetal testes reconstitution.
• The system facilitates the study of testicular cell interactions.
• This platform offers potential insights into human male gametogenesis and infertility.