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Related Concept Videos

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Testes: Histology

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Related Experiment Video

Updated: Jul 4, 2026

Germ Cell Transplantation and Testis Tissue Xenografting in Mice
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Tissue engineered testicular prostheses with prolonged testosterone release.

Atlantida M Raya-Rivera1, Carlos Baez, Anthony Atala

  • 1Hospital Infantil de Mexico "Federico Gomez", Mexico City, Mexico.

World Journal of Urology
|June 10, 2008
PubMed
Summary
This summary is machine-generated.

Engineered cartilage testicular prostheses release testosterone for 40 weeks, maintaining physiologic levels. This novel technology offers a potential solution for long-term hormonal replacement in patients needing testicular prostheses.

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Area of Science:

  • Biomaterials Engineering
  • Endocrinology
  • Tissue Engineering

Background:

  • Bilateral anorchia necessitates testicular prostheses and testosterone supplementation.
  • Current testosterone delivery methods have suboptimal pharmacokinetics.
  • There is a need for improved, long-term testosterone replacement therapy.

Purpose of the Study:

  • To create hormone-releasing testicular prostheses for continuous testosterone supply.
  • To maintain physiologic testosterone levels in vivo over an extended period.
  • To explore the potential of engineered cartilage as a testosterone delivery vehicle.

Main Methods:

  • Bovine chondrocytes were seeded onto polymer scaffolds to create cartilage testicular prostheses.
  • Testosterone enanthate was injected into the prostheses, which were cultured ex vivo for 40 weeks.
  • Prostheses were implanted into castrated athymic mice to assess in vivo testosterone release and host response.

Main Results:

  • Engineered cartilage testicular prostheses were successfully created and maintained testosterone release for 40 weeks.
  • Ex vivo studies showed an initial testosterone burst followed by a 16-week plateau (>500 ng/dl).
  • In vivo studies demonstrated sustained physiologic testosterone levels in implanted animals.

Conclusions:

  • Engineered cartilage testicular prostheses can be created, implanted, and release testosterone long-term.
  • The prostheses maintain testosterone levels within the physiologic range.
  • This technology holds promise for patients requiring testicular prostheses and chronic hormone supplementation.