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J Reconstr Microsurg 2017; 33(05): 367-376
DOI: 10.1055/s-0037-1599077
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Prefabrication of Vascularized Allogenic Bone Graft in a Rat by Implanting a Flow-Through Vascular Pedicle and Basic Fibroblast Growth Factor Containing Hydroxyapatite/Collagen Composite

Konosuke Yamaguchi
1   Department of Orthopaedic Surgery, Faculty of Medicine, Kagawa University, Kagawa, Japan
,
Yoshio Kaji
1   Department of Orthopaedic Surgery, Faculty of Medicine, Kagawa University, Kagawa, Japan
,
Osamu Nakamura
1   Department of Orthopaedic Surgery, Faculty of Medicine, Kagawa University, Kagawa, Japan
,
Sachiko Tobiume
1   Department of Orthopaedic Surgery, Faculty of Medicine, Kagawa University, Kagawa, Japan
,
Tetsuji Yamamoto
1   Department of Orthopaedic Surgery, Faculty of Medicine, Kagawa University, Kagawa, Japan
› Author Affiliations
Further Information

Publication History

06 October 2016

07 January 2017

Publication Date:
24 February 2017 (online)

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Abstract

Background Basic fibroblast growth factor (bFGF) is known to stimulate bone formation and angiogenesis. Hydroxyapatite/collagen composite (HAp/Col) is also known to have very strong bone conductive activity. In this study, prefabrication of vascularized allogenic bone (allo-bone) graft was attempted in recipients by implanting vascular bundles from recipients into the transplanted allo-bone graft. Furthermore, the effect of bFGF-containing HAp/Col on the prefabricated vascularized allo-bone graft was investigated.

Methods In this study, 32 Sprague-Dawley rats were used as donors, and bone grafts were collected from their femora. Thirty-two Wistar rats (recipients) were divided into four groups, and the allo-bone grafts were transplanted into the thigh region. In the experimental groups, one or both of the flow-through saphenous vascular bundles and 100-μg bFGF-containing HAp/Col were implanted into the medullary cavity of the allo-bone grafts. In the control group, neither was implanted. These rats were sacrificed at 4 weeks after transplantation, and bone formation, angiogenesis, and bone resorption in the transplanted allo-bone grafts were evaluated histologically and genetically.

Results Bone formation and angiogenesis in the transplanted allo-bone graft were effectively stimulated by implanting vascular bundles or bFGF-containing HAp/Col on both histological and genetic evaluations compared with the control group. The most significant stimulation was observed in the group in which both were implanted. Bone resorption was not stimulated in any group.

Conclusion By implanting a flow-through vascular bundle and bFGF-containing HAp/Col, an ideal vascularized allo-bone graft that had high bone formative and angiogenetic activities and did not stimulate bone resorptive activity was prefabricated.

Keywords

allo-bone graft - bFGF - hydroxyapatite/collagen
 

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