Scientists have developed a bone-repair material from sheep's wool that promotes the regeneration of more natural-looking bone tissue. This material, derived from keratin, a structural protein found in wool, was tested in animal models.
The research showed that the wool-based keratin supported bone regeneration in damaged areas. The new tissue formed was more organized and structurally similar to healthy bone compared to tissue grown using conventional collagen scaffolds. This discovery could transform an abundant agricultural byproduct into a valuable resource for regenerative medicine.
Researchers at King's College London conducted the study. They created membranes from keratin extracted from wool. These membranes were chemically treated to enhance stability and durability. Initial laboratory tests with human bone cells showed good growth and signs of healthy bone formation on the material.
Subsequently, the keratin membranes were implanted into rats with skull defects. These defects were too large to heal naturally. Over several weeks, the team monitored bone growth. While collagen membranes produced a greater overall amount of bone, the keratin scaffolds resulted in bone with better organization and alignment of fibers. This made the new tissue more closely resemble natural, healthy bone.
Collagen has been a standard material in regenerative medicine for decades. However, it has limitations, including relative weakness and rapid degradation. Collagen extraction can also be complex and expensive. Wool offers a sustainable and renewable alternative, as it is a naturally derived material often discarded by the farming industry.
The keratin membranes remained stable throughout the healing process and integrated well with surrounding tissue. This indicates their potential for practical medical applications. This research marks a significant step toward using wool-based materials for bone repair in living biological systems.
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