title: Bone repair using a hybrid scaffold of self-assembling peptide PuraMatrix and polyetheretherketone cage in rats.
abstract: Self-assembling peptide scaffold (SAPS) is well known to have very good bone conduction properties. However, the intensity of SAPS is too weak to actually use it for a clinical bone regeneration. Therefore, we have produced a hybrid scaffold system that involves fabricating a cage from polyetheretherketone (PEEK) that has high intensity, filling the interior of this cage with SAPS, and then transplanted this hybrid scaffold to bone defects in rat femurs. After 28 days, soft X-ray radiographs and histological assessment revealed that good new bone formation was clearly observed in the defects transplanted the PEEK cage with SAPS, but not in the PEEK cage only. The PEEK cage maintained a form and osteoconduction ability of internal SAPS, and SAPS promoted bone formation inside the PEEK; therefore, each was in charge of intensity and bone regeneration separately. The present study suggests that hybrid scaffolds made from PEEK cages and SAPS can be useful tools for the regeneration of load-bearing bones, based on the idea that it should be possible to develop ideal bone filler materials by combining the strength of artificial bone with the bone regeneration and bone conduction properties of SAPS.
authors.affiliation: Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Nakahara
authors.forename: Haruo
authors.initials: H
authors.lastname: Misawa
authors.forename: Aki
authors.initials: A
authors.lastname: Yoshida
authors.forename: Takayuki
authors.initials: T
authors.lastname: Hayashi
authors.forename: Masato
authors.initials: M
authors.lastname: Tanaka
authors.forename: Takayuki
authors.initials: T
authors.lastname: Furumatsu
authors.forename: Noriaki
authors.initials: N
authors.lastname: Tanaka
authors.forename: Naoya
authors.initials: N
authors.lastname: Kobayashi
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Ozaki
mesh_terms: D000818:Animals; D001577:Benzophenones; D001842:Bone and Bones / Q000000981:diagnostic imaging / Q000187:drug effects* / Q000473:pathology*; D019245:Compressive Strength / Q000187:drug effects; D050659:Core Binding Factor Alpha 1 Subunit / Q000378:metabolism; D005260:Female; D007659:Ketones / Q000494:pharmacology*; D008422:Materials Testing; D015675:Osteocalcin / Q000378:metabolism; D010455:Peptides / Q000494:pharmacology*; D011092:Polyethylene Glycols / Q000494:pharmacology*; D011108:Polymers; D019919:Prosthesis Implantation; D011859:Radiography; D051381:Rats; D017208:Rats, Wistar; D054457:Tissue Scaffolds / Q000737:chemistry*; D042461:Vascular Endothelial Growth Factor A / Q000378:metabolism; D014945:Wound Healing / Q000187:drug effects*
chemical_list: D001577:Benzophenones; D050659:Core Binding Factor Alpha 1 Subunit; D007659:Ketones; D010455:Peptides; D011108:Polymers; C546681:RADA16-I; D042461:Vascular Endothelial Growth Factor A; D015675:Osteocalcin; C063834:polyetheretherketone; D011092:Polyethylene Glycols