Researchers at King’s College London have identified keratin, a natural protein found in wool, as a potential solution for bone regeneration. The material was extracted from wool and developed into membranes designed to serve as scaffolds during bone healing. Initial laboratory testing demonstrated that human bone cells grew effectively on the keratin material and displayed markers consistent with healthy bone formation.
The team subsequently conducted animal testing using rats with skull defects too large to heal naturally. The keratin membranes were implanted into these defects, and researchers monitored bone regeneration over subsequent weeks. The results indicated that while collagen membranes—the current industry standard—produced a greater overall volume of bone, the bone formed with keratin scaffolds exhibited superior structural organization and alignment of fibers, more closely resembling naturally occurring healthy bone tissue.
The keratin membranes maintained stability throughout the healing process and integrated smoothly with adjacent tissue, characteristics viewed as critical for eventual medical applications. Dr. Sherif Elsharkawy from King’s Faculty of Dentistry, Oral & Craniofacial Sciences noted that collagen has several limitations, including relative weakness, potential for rapid degradation, and complicated and costly extraction processes. The wool-based alternative addresses sustainability concerns, as wool is a naturally derived material often discarded as waste by agricultural operations, positioning it as a renewable and scalable resource.
Researchers characterized the successful animal testing as a significant milestone that moves keratin beyond early conceptual stages. The team indicated that the technology demonstration in living biological systems brings the potential clinical application substantially closer to practical use in patients requiring bone repair.
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