Abstract
Purpose
The aim of this study was to quantify the amount of bone morphogenic protein 7 (BMP-7) in bone samples in different storage and treatment conditions used in bone banks and thereby evaluate the benefit of this test as a routine measure before bone grafting.
Methods
Fresh as well as frozen bone chips, each with and without antibiotic impregnation, were screened for their BMP-7 content. Human bone chips were produced from femoral heads of two female donors who had undergone total hip replacement surgery. The amount of BMP-7 was detected using a commercially available enzyme-linked immunosorbent assay (ELISA) test.
Results
There were no significant differences between groups in samples obtained from the first femoral head. Bone-chip samples derived from the second femoral head showed significant differences between groups. The actual amount of these differences was small and most likely biologically irrelevant. It is important to note that there was a significant difference between groups when comparing both femoral heads, reflecting donor-to-donor variability.
Conclusion
ELISA testing for BMP-7 as a qualitative measurement of bone grafts should be considered a routine quality-control test for bone banks.
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Acknowlegments
We thank Birgit Ladner from the Bone Bank and Department of Blood Transfusion and Immunology, Innsbruck Medical University, for their comments and improvement of this manuscript. We thank Prof. Klaus-Dieter Kühn from Heraeus Medical GmbH for sponsoring the antibiotics.
Conflicts of interest
This study was carried out with internal funds from Experimental Orthopedics, Innsbruck Medical University.
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Wurm, A., Nogler, M., Ammann, C.G. et al. Effect of storage temperature and antibiotic impregnation on the quantity of bone morphogenetic protein seven in human bone grafts. International Orthopaedics (SICOT) 38, 1513–1517 (2014). https://doi.org/10.1007/s00264-014-2349-3
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DOI: https://doi.org/10.1007/s00264-014-2349-3