title: Human bone morphogenetic protein 7 transfected nucleus pulposus cells delay the degeneration of intervertebral disc in dogs.
abstract: The main reason for intervertebral disc (IVD) degeneration is the decrease in the quantity and activity of IVD cells with subsequent reduction of the extracellular matrix (ECM). In this study, we investigated a cell-based repair strategy by injecting nucleus pulposus cells (NPCs) transduced with human bone morphogenetic protein (hBMP7) by adeno-associated virus-2 into the canine degenerative IVD to determine whether NPCs expressing hBMP7 could delay the degeneration of the IVD. Fourteen canines received annular punctures to induce disc degeneration. Eight weeks later, saline (group A), allogeneic NPCs (group B), or allogeneic NPCs transduced with hBMP7 (group C) were injected into the degenerative discs. Twelve weeks after the injection, MRI scan showed that the degeneration process of groups C was slower and less severe compared with that of groups B and C. The IVD stability in group C was superior to that in groups A and B in left-right bending and rotation. HE, safranin-O staining, and ELISA indicated that the degenerative degree of the IVD in group C was significantly milder than that in groups A and B. The study demonstrated that the implantation of NPCs-hBMP7 could effectively maintained the structural integrity, ECM, and biomechanical properties of the canine degenerated discs. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:1311-1322, 2017.
authors.affiliation: Department of Orthopedic Surgery, Navy General Hospital, Fucheng Road No. 6, Haidian District, Beijing, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Gu
authors.affiliation: Department of Orthopedic Surgery, Navy General Hospital, Fucheng Road No. 6, Haidian District, Beijing, China.
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Shi
authors.affiliation: Department of Orthopedic Surgery, Navy General Hospital, Fucheng Road No. 6, Haidian District, Beijing, China.
authors.forename: Chaofeng
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Orthopedic Surgery, Navy General Hospital, Fucheng Road No. 6, Haidian District, Beijing, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Chen
authors.affiliation: Department of Orthopedic Surgery, Navy General Hospital, Fucheng Road No. 6, Haidian District, Beijing, China.
authors.forename: Jianhong
authors.initials: J
authors.lastname: Wu
authors.affiliation: Department of Orthopedic Surgery, Navy General Hospital, Fucheng Road No. 6, Haidian District, Beijing, China.
authors.forename: Deli
authors.initials: D
authors.lastname: Wang
authors.affiliation: Department of Orthopedic Surgery, Navy General Hospital, Fucheng Road No. 6, Haidian District, Beijing, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Xu
authors.affiliation: Department of Orthopedic Surgery, Navy General Hospital, Fucheng Road No. 6, Haidian District, Beijing, China.
authors.forename: He
authors.initials: H
authors.lastname: Qing
authors.affiliation: Department of Orthopedic Surgery, Navy General Hospital, Fucheng Road No. 6, Haidian District, Beijing, China.
authors.forename: Ruan
authors.initials: R
authors.lastname: Dike
mesh_terms: D000818:Animals; D055419:Bone Morphogenetic Protein 7 / Q000008:administration & dosage* / Q000235:genetics / Q000378:metabolism; D064987:Cell- and Tissue-Based Therapy / Q000379:methods*; D004285:Dogs; D005260:Female; D018014:Gene Transfer Techniques; D015316:Genetic Therapy / Q000379:methods*; D006801:Humans; D055959:Intervertebral Disc Degeneration / Q000000981:diagnostic imaging / Q000628:therapy*; D008279:Magnetic Resonance Imaging; D000070614:Nucleus Pulposus / Q000166:cytology; D011859:Radiography
chemical_list: D055419:Bone Morphogenetic Protein 7
keywords: canine disc degeneration model; cell therapy; disc degeneration; human bone morphogenetic protein 7 (hBMP7); nucleus pulposus cells