Volume 13, Issue 12 pp. 2169-2180
RESEARCH ARTICLE

Improving intraoperative storage conditions for autologous bone grafts: An experimental investigation in mice

Qiang Sun

Qiang Sun

Department of Plastic Surgery, The First Hospital of China Medical University, Shenyang, China

Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford School of Medicine, Stanford, CA

Qiang Sun, Zhijun Li, and Bo Liu contributed equally.Search for more papers by this author
Zhijun Li

Zhijun Li

Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford School of Medicine, Stanford, CA

Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China

Qiang Sun, Zhijun Li, and Bo Liu contributed equally.Search for more papers by this author
Bo Liu

Bo Liu

Ankasa Regenerative Therapeutics, Inc., South San Francisco, CA

Qiang Sun, Zhijun Li, and Bo Liu contributed equally.Search for more papers by this author
Xue Yuan

Xue Yuan

Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford School of Medicine, Stanford, CA

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Shu Guo

Shu Guo

Department of Plastic Surgery, The First Hospital of China Medical University, Shenyang, China

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Jill A. Helms

Corresponding Author

Jill A. Helms

Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford School of Medicine, Stanford, CA

Ankasa Regenerative Therapeutics, Inc., South San Francisco, CA

Correspondence

Jill A. Helms, Stanford University, 1651 Page Mill Road, Palo Alto, CA 94304.

Email: [email protected]

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First published: 16 October 2019
Citations: 11

Abstract

Autologous bone grafts constitute the second most transplanted tissue in medicine today. The viability, and consequently the osteogenic capacity, of an autograft is directly impacted by the interval between harvest and transplantation, but how the temperature and the solution in which the graft is held intraoperatively affect viability is not clear. Using a syngeneic mouse model and in vivo bone-forming assays, these variables were tested for their effects on programmed cell death, osteoprogenitor cell proliferation, and the ability of the autograft to ultimately produce new bone in an ectopic site. Based on these results, the intraoperative treatment with a WNT protein therapeutic was tested for its effects on the viability and osteogenic capacity of an autograft. Viability, programmed cell death, mitotic activity, osteogenic protein expression, and bone-forming capacity were assessed. Experimental results demonstrated that the osteogenic capacity of an autograft is significantly improved by intraoperative storage in L-WNT3A at physiological temperature.

CONFLICT OF INTEREST

B.L and J.A.H. are employees of Ankasa Regenerative Therapeutics, a biopharmaceutic company developing L-WNT3A for commercial use.

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