Abstract
Purpose
There is a significantly higher incidence of delayed unions, non-unions, and increased healing time in diabetic patients compared with non-diabetic patients. Studies suggest that diabetics suffer from deficiencies of pancreatic stem/progenitor cells, and a clinically relevant question arises concerning the availability and functionality of progenitor cells obtained from bone marrow of diabetics for applications in bone repair.
Methods
We have evaluated the cellularity and frequency of osteogenic mesenchymal stem cells (MSCs) in bone marrow from 54 diabetic patients (12 with type 1 and 42 with type 2) with tibial non-unions. These patients were treated with bone marrow MSCs (BM-MSCs) delivered in an autologous bone marrow concentrate (BMC). Clinical outcomes and marrow cellularity were compared to 54 non-diabetic, matched patients with tibial non-unions also treated with BMC.
Results
After adjusting for age and sex, no differences were identified with respect to bone marrow cellularity and MSC number among the diabetic and non-diabetic groups and both groups received approximately the same number of MSCs on average. BMC treatment promoted non-union healing in 41 diabetic patients (76 %) and 49 non-diabetic patients (91 %), but the non-diabetic patients healed more quickly and produced a larger volume of callus.
Conclusion
We recommend that diabetic patients be treated with an increased number of progenitor cells by increasing the bone marrow aspiration volume. We also anticipate a need to extend the time of casting and non-weight bearing for diabetic patients as compared with non-diabetic patients.
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Acknowledgments
We thank Ted Sand and Richard Suzuki and the other members of Celling Biosciences for the review of the final manuscript, and their help in translation.
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Flouzat-Lachaniette, C.H., Heyberger, C., Bouthors, C. et al. Osteogenic progenitors in bone marrow aspirates have clinical potential for tibial non-unions healing in diabetic patients. International Orthopaedics (SICOT) 40, 1375–1379 (2016). https://doi.org/10.1007/s00264-015-3046-6
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DOI: https://doi.org/10.1007/s00264-015-3046-6