title: Additive effects of hyperbaric oxygen and platelet-derived growth factor-BB in chondrocyte transplantation via up-regulation expression of platelet-derived growth factor-beta receptor.
abstract: The present study investigated the effects of hyperbaric oxygen (HBO) and platelet-derived growth factor-BB (PDGF-BB) in chondrocyte transplantation. In vitro, chondrocytes were treated with HBO, PDGF-BB, and HBO combined with PDGF-BB (H+P). Cell growth was analyzed using cell counting, MTT assay, and FACS analysis. mRNA expression of the PDGF-alpha receptor (PDGFR-alpha) and beta receptor (PDGFR-beta) was detected by RT-PCR. Protein expression of PDGFR-beta was detected by Western blotting. In vivo, chondrocytes and PDGF-BB were suspended in alginate as a transplantation system. Cartilage defects were grafted with this system and with or without HBO treatment. Released PDGF-BB concentration was quantified by ELISA. After 8 weeks, animals were sacrificed and the repaired tissues were examined. In vitro data suggested that each treatment increased cell growth via the up-regulated mRNA expression of PDGFR-alpha and increased cell accumulation in the S-phase. The H+P treatment was more additive in cell growth and in mRNA and protein expression of PDGFR-beta than HBO or PDGF-BB. In vivo results suggested that PDGF-BB delivery lasted for more than 5 weeks. Scoring results showed that each treatment significantly increased the cartilage repair. Safranin-O and type II collagen staining confirmed the hyaline-like cartilage regeneration in the repaired tissues. In situ up-regulation of PDGFR-beta expression partially explains the additive effect of H+P treatment in cartilage repair. Accordingly, H+P offers a potential treatment method for cartilage repair.
authors.affiliation: Department of Orthopaedic Surgery and Hyperbaric Oxygen Therapy Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
authors.forename: Li-Jen
authors.initials: LJ
authors.lastname: Yuan
authors.forename: Chi-Chien
authors.initials: CC
authors.lastname: Niu
authors.forename: Song-Shu
authors.initials: SS
authors.lastname: Lin
authors.forename: Yi-Sheng
authors.initials: YS
authors.lastname: Chan
authors.forename: Chuen-Yung
authors.initials: CY
authors.lastname: Yang
authors.forename: Wen-Jer
authors.initials: WJ
authors.lastname: Chen
authors.forename: Steve W N
authors.initials: SW
authors.lastname: Ueng
mesh_terms: D000818:Animals; D000077214:Becaplermin; D002356:Cartilage / Q000293:injuries; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D019902:Chondrocytes / Q000378:metabolism / Q000637:transplantation*; D024043:Collagen Type II / Q000096:biosynthesis; D006931:Hyperbaric Oxygenation; D010982:Platelet-Derived Growth Factor / Q000627:therapeutic use*; D020574:Proto-Oncogene Proteins c-sis; D012333:RNA, Messenger / Q000378:metabolism; D011817:Rabbits; D020797:Receptor, Platelet-Derived Growth Factor beta / Q000096:biosynthesis* / Q000235:genetics; D015854:Up-Regulation
chemical_list: D024043:Collagen Type II; D010982:Platelet-Derived Growth Factor; D020574:Proto-Oncogene Proteins c-sis; D012333:RNA, Messenger; D000077214:Becaplermin; D020797:Receptor, Platelet-Derived Growth Factor beta