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Related Experiment Video

Updated: May 17, 2026

Three-Dimensional Culture of Vascularized Thermogenic Adipose Tissue from Microvascular Fragments
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Three-Dimensional Culture of Vascularized Thermogenic Adipose Tissue from Microvascular Fragments

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Simple and longstanding adipose tissue engineering in rabbits.

Wakako Tsuji1, Takashi Inamoto, Ran Ito

  • 1Division of Breast Surgery, Department of Surgery, Graduate School of Medicine, Kyoto University, 54 Kawara-cho, Shogoin, Sakyo-ku, Kyoto, Japan. w-sato@kuhp.kyoto-u.ac.jp

Journal of Artificial Organs : the Official Journal of the Japanese Society for Artificial Organs
|November 2, 2012
PubMed
Summary

This study demonstrates successful adipose tissue regeneration for breast reconstruction using only type I collagen sponges, eliminating the need for growth factors like FGF2. This simplified approach shows significant de novo adipogenesis, offering a promising clinical method.

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Area of Science:

  • Regenerative Medicine
  • Biomaterials Science
  • Plastic and Reconstructive Surgery

Background:

  • Adipose tissue engineering is crucial for breast reconstruction after surgery.
  • Previous methods utilized type I collagen sponges with fibroblast growth factor 2 (FGF2) and stem cells.
  • Limitations include the need for large tissue volumes and FGF2 unavailability for clinical breast cancer patient treatment.

Purpose of the Study:

  • To develop a method for regenerating large adipose tissue volumes without FGF2 for extended periods.
  • To assess the efficacy of type I collagen sponge scaffolds in promoting de novo adipogenesis.
  • To evaluate ultrasonography as a non-invasive monitoring tool for tissue regeneration.

Main Methods:

  • Polypropylene mesh cages (10mm radius, 10mm height) were implanted in rabbit fat pads under general anesthesia.

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  • Minced type I collagen sponge was injected as a scaffold within the cages.
  • Tissue regeneration was monitored non-invasively using ultrasonography and invasively via histological analysis (hematoxylin and eosin staining) at 3, 6, and 12 months.

    • Main Results:

    • Ultrasonography showed a progressive increase in a homogeneous high-echo area within the cages.
    • Histological assessment revealed significant de novo adipogenesis.
    • Regenerated adipose tissue occupied 76.2 ± 13.0% and 92.8 ± 6.6% of the scaffold area at 6 and 12 months, respectively.

    Conclusions:

    • Type I collagen sponge alone, implanted within a confined space, effectively promotes substantial adipose tissue regeneration.
    • Ultrasonography is a reliable, non-invasive method for monitoring tissue growth in this model.
    • This simplified approach represents a promising clinical strategy for breast reconstruction.