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Changes in bone inducing activity of bone morphogenetic protein with aging
1Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Kyoto University, Japan.
Annales Chirurgiae Et Gynaecologiae. Supplementum
|January 1, 1993
Summary
Bone morphogenetic protein (BMP) activity declines with recipient age, but bone induction is still observed in older rats. This suggests BMP remains viable for clinical use in elderly patients.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Orthopedic Research
Background:
- Bone morphogenetic protein (BMP) is crucial for bone regeneration.
- Future clinical applications of BMP are anticipated primarily in elderly patients.
Purpose of the Study:
- To investigate the impact of recipient aging on bone morphogenetic protein (BMP) activity.
- To evaluate the efficacy of BMP in promoting bone formation across different age groups.
Main Methods:
- Bovine bone matrix-derived BMP was purified using Bessho's method.
- Purified BMP with atelopeptide type I collagen was implanted into Wistar rats aged 5, 10, 20, and 40 weeks.
- Bone formation was assessed via soft X-ray and light microscopy after 3 weeks.
Main Results:
- New bone formation was observed in all aged recipient rats.
- Alkaline phosphatase (ALP) activity and calcium (Ca) content decreased with increasing recipient age.
- Bone induction was successfully detected even in 40-week-old rats.
Conclusions:
- The bone-inducing activity of BMP diminishes proportionally with recipient aging.
- Despite age-related decreases in activity, BMP demonstrates significant potential for clinical application in elderly patients.