A turmeric- and ginger-based orthopedic implant coating may improve bone recovery after cancer surgery. Digest
Orthopedic implants need to bond firmly with surrounding bone while resisting microbes that can grow on their surfaces. Implants used after bone-cancer surgery face another challenge: limiting how many bone cancer cells remain alive on the implant surface. Researchers tested whether an implant coating could address these problems by locally delivering curcumin, a compound from turmeric, and ginger extract.
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This preclinical study used a titanium alloy commonly studied for load-bearing implants, coated with hydroxyapatite, a bone-like calcium phosphate. Some coatings also contained zinc oxide and some were also loaded with curcumin or with curcumin plus ginger extract. The researchers assessed the coating in lab tests using bone-forming cells, MG-63 osteosarcoma cells (a bone cancer cell line), and Staphylococcus aureus bacteria (S. aureus, a common cause of implant infections), then tested new bone formation after 6 weeks in a rat thigh bone.
- The coatings released the plant compounds slowly over time. After 28 days, curcumin release ranged from about 12% to 20%, and ginger extract release ranged from about 9% to 15%.
- Over 1 to 2 weeks, the coating that included hydroxyapatite, zinc oxide, curcumin, and ginger (H+Z+C+G) showed the highest number of living bone-forming cells, about 1.5 times higher than the basic hydroxyapatite coating.
- In cell experiments, the H+Z+C+G version had the strongest effect on bone cancer cells. After 11 days, the number of living cancer cells was about 11 times lower than on the basic coating.
- The same H+Z+C+G coating reduced S. aureus by about 92% after 36 hours.
- In rats, the H+Z+C+G version led to the most new bone growth. After 6 weeks, there was about twice as much new bone around it as around the basic coating.
The lab findings suggest that the H+Z+C+G coating can support bone-forming cells while making the surface less favorable for bone cancer cells and S. aureus. Hydroxyapatite provides a surface similar to natural bone, which supports attachment and growth of bone-forming cells. Zinc is an essential trace element and is proposed to promote bone formation while also interfering with bacterial survival. Curcumin and compounds in ginger are thought to influence how cells grow, divide, and survive, including processes involved in bone formation and cancer-cell activity.
The findings are early-stage, and more research is needed before such coatings could be considered for use in humans. However, if confirmed in further studies, this approach could help create implants that better support healing while reducing infection and cancer-related risks. In this clip, Dr. Mark Mattson discusses our fascinating coevolution with plants and why mildly toxic phytochemicals promote longevity better than antioxidants.