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Functionalized D-form self-assembling peptide hydrogels for bone regeneration

Authors He B, Ou Y, Zhou A, Chen S, Zhao W, Zhao J, Li H, Zhu Y, Zhao Z, Jiang D

Received 2 October 2015

Accepted for publication 24 February 2016

Published 11 April 2016 Volume 2016:10 Pages 1379—1388


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Prof. Dr. Wei Duan

Bin He,1 Yunsheng Ou,1 Ao Zhou,1 Shuo Chen,1 Weikang Zhao,1 Jinqiu Zhao,2 Hong Li,3 Yong Zhu,1 Zenghui Zhao,1 Dianming Jiang1

1Department of Orthopedics, 2Department of Infectious Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People’s Republic of China; 3School of Physical Science and Technology, Sichuan University, Chengdu, People’s Republic of China

Abstract: Bone defects are very common in orthopedics, and there is great need to develop suitable bone grafts for transplantation in vivo. However, current bone grafts still encounter some limitations, including limited availability, immune rejection, poor osteoinduction and osteoconduction, poor biocompatibility and degradation properties, etc. Self-assembling peptide nanofiber scaffolds have emerged as an important substrate for cell culture and bone regeneration. We report on the structural features (eg, Congo red staining, circular dichroism spectroscopy, transmission electron microscopy, and rheometry assays) and osteogenic ability of D-RADA16-RGD peptide hydrogels (with or without basic fibroblast growth factor) due to the better stability of peptide bonds formed by these peptides compared with those formed by L-form peptides, and use them to fill the femoral condyle defect of Sprague Dawley rat model. The bone morphology change, two-dimensional reconstructions using microcomputed tomography, quantification of the microcomputed tomography analyses as well as histological analyses have demonstrated that RGD-modified D-form peptide scaffolds are able to enhance extensive bone regeneration.

Keywords: bone defect, functionalized D-form self-assembling peptide, D-RADA16-RGD, peptide hydrogel, bone regeneration

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