Biocompatibility Study of Purified and Low-Temperature-Sterilized Injectable Collagen for Soft Tissue Repair:...

Area of Science:

• Biomaterials Science
• Dermatology
• Tissue Engineering

Background:

• Collagen biomaterials are increasingly used in tissue engineering and cosmetics.
• Clinical evidence for oral and injectable collagen skin enhancers is limited.
• Injectable collagen safety is challenged by sterilization difficulties and contamination risks.

Purpose of the Study:

• To develop and validate a novel sterilization technique for collagen gels.
• To assess the safety and efficacy of the processed collagen gel as a skin booster.

Main Methods:

• A novel double filtration and low-temperature steam sterilization method was applied to a collagen gel.
• In vitro sterility, cytotoxicity, degradation, integrity, and viscosity were evaluated.
• In vitro cell culture assessed collagen-induced fibroblast proliferation and new collagen expression.
• In vivo studies in rats evaluated safety and lesion development over 13 weeks.

Main Results:

• The novel sterilization method achieved sterility without compromising collagen integrity or viscosity.
• In vitro tests showed no cytotoxicity and confirmed collagen-induced fibroblast proliferation and new collagen expression.
• In vivo studies in rats demonstrated no adverse effects or significant lesions at the implantation site over 13 weeks.

Conclusions:

• The double filtration and low-temperature steam sterilization method is a safe and effective approach for processing collagen gels for skin applications.
• This novel processing technique mitigates safety concerns associated with injectable collagen products.
• Further research is warranted to fully validate the biological effectiveness and clinical benefits of this collagen gel formulation.