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Optimization of Gelatin-Based Scaffolds for Soft Tissue Regeneration: In Vitro and In Vivo Performance.

Zita Szűcs-Takács1, Viktória Varga1, Fanni Bán1

  • 1Institute of Translational Medicine, Semmelweis University, 1094 Budapest, Hungary.

International Journal of Molecular Sciences
|September 27, 2025
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This study developed novel gelatin-based scaffolds for soft tissue implants. The optimal scaffold composition successfully integrated with host tissue, promoting vascularization and adipose tissue adherence without inflammation.

Keywords:
biomaterialscross-linked gelatinin vivo remodelingsoft tissue implant

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Gelatin-based scaffolds are promising for medical applications.
  • Developing suitable matrices for soft tissue implants is crucial.
  • Regulation as medical devices requires rigorous testing.

Purpose of the Study:

  • To evaluate cross-linked gelatin-based scaffolds for soft tissue implantation.
  • To identify an optimal scaffold composition for in vivo use.
  • To assess the biocompatibility and tissue integration of the scaffolds.

Main Methods:

  • In vitro testing of three cross-linkers: divinyl sulfone (DVS), poly(ethylene glycol) diglycidyl ether (PEGDE), and 1,4-butanediol diglycidyl ether (BDDE).
  • Scanning Electron Microscopy (SEM) for surface analysis.
  • In vivo implantation in BL6 mice for one and three months.
  • Explant analysis using microscopic imaging and histological evaluation.

Main Results:

  • Scaffolds with DVS showed rigidity and cracks; PEGDE resulted in uneven surfaces.
  • The optimal scaffold composition included 5% BDDE.
  • Successful infiltration of cells, connective tissue, and extracellular matrix (ECM) observed.
  • No induced inflammation noted in explants.
  • Evidence of blood vessel formation and adipose tissue adherence.

Conclusions:

  • The optimized BDDE-cross-linked gelatin scaffold is a promising candidate for soft tissue implants.
  • The scaffold demonstrates excellent biocompatibility and promotes tissue regeneration.
  • Further development could lead to its regulation as a medical device.