PuraMatrix facilitates bone regeneration in bone defects of calvaria in mice.
Artificial bones have often used for bone regeneration due to their strength, but they cannot provide an adequate environment for cell penetration and settlement. We therefore attempted to explore various materials that may allow the cells to penetrate and engraft in bone defects. PuraMatrix is a self-assembling peptide scaffold that produces a nanoscale environment allowing both cellular penetration and engraftment. The objective of this study was to investigate the effect of PuraMatrix on bone regeneration in a mouse bone defect model of the calvaria. Matrigel was used as a control. The expression of bone-related genes (alkaline phosphatase, Runx2, and Osterix) in the PuraMatrix-injected bone defects was stronger than that in the Matrigel-injected defects. Soft X-ray radiographs revealed that bony bridges were clearly observed in the defects treated with PuraMatrix, but not in the Matrigel-treated defects. Notably, PuraMatrix treatment induced mature bone tissue while showing cortical bone medullary cavities. The area of newly formed bones at the site of the bone defects was 1.38-fold larger for PuraMatrix than Matrigel. The strength of the regenerated bone was 1.72-fold higher for PuraMatrix (146.0 g) than for Matrigel (84.7 g). The present study demonstrated that PuraMatrix injection favorably induced functional bone regeneration.
Misawa
Haruo
H
Department of Orthopeadic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan.
Kobayashi
Naoya
N
Soto-Gutierrez
Alejandro
A
Chen
Yong
Y
Yoshida
Aki
A
Rivas-Carrillo
Jorge David
JD
Navarro-Alvarez
Nalu
N
Tanaka
Kimiaki
K
Miki
Atsushi
A
Takei
Jiro
J
Ueda
Tadayoshi
T
Tanaka
Masato
M
Endo
Hirosuke
H
Tanaka
Noriaki
N
Ozaki
Toshifumi
T
D000469:Alkaline Phosphatase / Q000235:genetics; D000818:Animals; D001861:Bone Regeneration / Q000187:drug effects*; D018786:Bone Substitutes / Q000627:therapeutic use*; D016025:Bone Transplantation / Q000379:methods*; D050659:Core Binding Factor Alpha 1 Subunit / Q000235:genetics; D005260:Female; D015870:Gene Expression / Q000187:drug effects; D051379:Mice; D008807:Mice, Inbred BALB C; D016513:Mice, SCID; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012886:Skull / Q000378:metabolism / Q000503:physiopathology / Q000601:surgery*; D000076182:Sp7 Transcription Factor; D014157:Transcription Factors / Q000235:genetics
D018786:Bone Substitutes; D050659:Core Binding Factor Alpha 1 Subunit; D012333:RNA, Messenger; C493716:Runx2 protein, mouse; D000076182:Sp7 Transcription Factor; C479466:Sp7 protein, mouse; D014157:Transcription Factors; D000469:Alkaline Phosphatase