title: Bone regeneration using hyaluronic acid-based hydrogel with bone morphogenic protein-2 and human mesenchymal stem cells.
abstract: Acrylated hyaluronic acid (HA) was used as a scaffold for bone morphogenic protein-2 (BMP-2) and human mesenchymal stem cells (hMSCs) for rat calvarial defect regeneration. HA was acrylated by two-step reactions: (1) introduction of an amine group using adipic acid dihydrazide (ADH); (2) acrylation by N-acryloxysuccinimide. Tetrathiolated poly(ethylene) glycol (PEG-SH(4)) was used as a cross-linker by a Michael-type addition reaction and the hydrogel was formed within 10min under physiological conditions. This hydrogel is degraded completely by 100U/ml hyaluronidase in vitro. hMSCs and/or BMP-2 was added during gelation. Cellular viability in vitro was increased up to 55% in the hydrogels with BMP-2 compared with the control. For in vivo calvarial defect regeneration, five different samples (i.e., control, hydrogel, hydrogel with BMP-2, hydrogel with MSCs, and hydrogel with BMP-2 and MSCs) were implanted for 4 weeks. The histological results demonstrated that the hydrogels with BMP-2 and MSCs had the highest expression of osteocalcin and mature bone formation with vascular markers, such as CD31 and vascular endothelial growth factors, compared with the other samples. This study demonstrated that HA base hydrogel can be used for cell and growth factor carriers for tissue regeneration.
authors.affiliation: Biomedical Engineering, Brain Korea 21 Project for Biomedical Science, Korea University Medical College, Seoul, Republic of Korea.
authors.forename: Jungju
authors.initials: J
authors.lastname: Kim
authors.forename: In Sook
authors.initials: IS
authors.lastname: Kim
authors.forename: Tae Hyung
authors.initials: TH
authors.lastname: Cho
authors.forename: Kyu Back
authors.initials: KB
authors.lastname: Lee
authors.forename: Soon Jung
authors.initials: SJ
authors.lastname: Hwang
authors.forename: Giyoong
authors.initials: G
authors.lastname: Tae
authors.forename: Insup
authors.initials: I
authors.lastname: Noh
authors.forename: Sang Hoon
authors.initials: SH
authors.lastname: Lee
authors.forename: Yongdoo
authors.initials: Y
authors.lastname: Park
authors.forename: Kyung
authors.initials: K
authors.lastname: Sun
mesh_terms: D000818:Animals; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins / Q000008:administration & dosage*; D001861:Bone Regeneration / Q000502:physiology*; D018929:Cell Culture Techniques / Q000379:methods; D003131:Combined Modality Therapy; D004337:Drug Carriers / Q000737:chemistry*; D006820:Hyaluronic Acid / Q000737:chemistry*; D020100:Hydrogels / Q000737:chemistry; D008297:Male; D008422:Materials Testing; D045164:Mesenchymal Stem Cell Transplantation / Q000379:methods*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012887:Skull Fractures / Q000188:drug therapy* / Q000473:pathology / Q000601:surgery*; D016212:Transforming Growth Factor beta / Q000008:administration & dosage*; D016896:Treatment Outcome
chemical_list: C525718:BMP2 protein, human; C525720:Bmp2 protein, rat; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins; D004337:Drug Carriers; D020100:Hydrogels; D016212:Transforming Growth Factor beta; D006820:Hyaluronic Acid