title: Glow discharge plasma pretreatment enhances osteoclast differentiation and survival on titanium plates.
abstract: Despite the fact that several reports have demonstrated osteoclast activity on various bioactive ceramics, osteoclast functions on surface-modified titanium have not come under focus. This study aimed to examine whether the increasing surface energy of glow discharge plasma (GDP) involved in protein adhesion containing the RGD (Arg-Gly-Asp) sequence affects osteoclast responses on titanium plates. We examined osteoclast differentiation and survival rates on titanium plates with and without GDP. The amounts of osteoclasts on titanium plates were not increased by GDP after 1 week. However, osteoclast differentiation was greatly activated by GDP pretreatment, as tartrate-resistant acid phosphatase synthesis significantly increased on the titanium plates with GDP. Additionally, since the presence of osteoclasts was detected only on the titanium plates with GDP, even after 4h cultivation in a coculture test, the osteoclasts survival rate was increased by GDP pretreatment. As osteoclast responses were affected even on surface modified metallic materials, we concluded that novel approaches are needed not only for osteoclastic resorption on ceramic materials but also for osteoclast responses on surface-modified metallic materials.
authors.affiliation: Department of Oral Biomaterials and Technology, School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, 142-8555, Tokyo, Japan. gd0004@dent.showa-u.ac.jp
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kawai
authors.forename: Yo
authors.initials: Y
authors.lastname: Shibata
authors.forename: Takashi
authors.initials: T
authors.lastname: Miyazaki
mesh_terms: D000135:Acid Phosphatase / Q000096:biosynthesis* / Q000737:chemistry; D000327:Adsorption; D001672:Biocompatible Materials / Q000737:chemistry; D001854:Bone Marrow Cells / Q000166:cytology / Q000502:physiology; D001860:Bone Plates; D002448:Cell Adhesion / Q000502:physiology; D002454:Cell Differentiation / Q000502:physiology; D002470:Cell Survival / Q000502:physiology; D002478:Cells, Cultured; D006358:Hot Temperature; D008422:Materials Testing; D008669:Metallurgy / Q000379:methods; D010010:Osteoclasts / Q000166:cytology* / Q000502:physiology*; D014025:Titanium / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D014025:Titanium; D000135:Acid Phosphatase