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Greer AI, Goriainov V, Kanczler J, Black CR, Turner LA, Meek RM, Burgess K, MacLaren I, Dalby MJ, Oreffo RO, Gadegaard N. Nanopatterned Titanium Implants Accelerate Bone Formation In Vivo. ACS APPLIED MATERIALS & INTERFACES 2020; 12:33541-33549. [PMID: 32633478 PMCID: PMC7467557 DOI: 10.1021/acsami.0c10273] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 07/06/2020] [Indexed: 05/05/2023]
Abstract
Accelerated de novo formation of bone is a highly desirable aim of implants targeting musculoskeletal injuries. To date, this has primarily been addressed by biologic factors. However, there is an unmet need for robust, highly reproducible yet economic alternative strategies that strongly induce an osteogenic cell response. Here, we present a surface engineering method of translating bioactive nanopatterns from polymeric in vitro studies to clinically relevant material for orthopedics: three-dimensional, large area metal. We use a titanium-based sol-gel whereby metal implants can be engineered to induce osteoinduction both in vitro and in vivo. We show that controlled disordered nanotopographies presented as pillars with 15-25 nm height and 100 nm diameter on titanium dioxide effectively induce osteogenesis when seeded with STRO-1-enriched human skeletal stem cells in vivo subcutaneous implantation in mice. After 28 days, samples were retrieved, which showed a 20-fold increase in osteogenic gene induction of nanopatterned substrates, indicating that the sol-gel nanopatterning method offers a promising route for translation to future clinical orthopedic implants.
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Affiliation(s)
- Andrew I.M. Greer
- Division
of Biomedical Engineering, School of Engineering, University of Glasgow, GlasgowG12 8LT, United Kingdom
| | - Vitali Goriainov
- Bone
and Joint Research Group, Centre for Human Development Stem Cells
and Regeneration, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Janos Kanczler
- Bone
and Joint Research Group, Centre for Human Development Stem Cells
and Regeneration, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Cameron R.M. Black
- Bone
and Joint Research Group, Centre for Human Development Stem Cells
and Regeneration, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Lesley-Anne Turner
- Centre
for Cell Engineering, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Robert M.D. Meek
- Department
of Orthopaedics, Queen Elizabeth University
Hospital, 1345 Govan
Road, Glasgow, Lanarkshire G51 4TF, United Kingdom
| | - Karl Burgess
- Glasgow
Polyomics
Facility, Institute of Biomedical and Life Sciences, University of Glasgow, GlasgowG12 8QQ, United Kingdom
| | - Ian MacLaren
- School
of Physics, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Matthew J. Dalby
- Centre
for Cell Engineering, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Richard O.C. Oreffo
- Bone
and Joint Research Group, Centre for Human Development Stem Cells
and Regeneration, University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Nikolaj Gadegaard
- Division
of Biomedical Engineering, School of Engineering, University of Glasgow, GlasgowG12 8LT, United Kingdom
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Hwang YH, Jang SA, Kim T, Ha H. Forsythia suspensa Protects against Bone Loss in Ovariectomized Mice. Nutrients 2019; 11:E1831. [PMID: 31398803 PMCID: PMC6722587 DOI: 10.3390/nu11081831] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 07/31/2019] [Accepted: 08/06/2019] [Indexed: 12/27/2022] Open
Abstract
In traditional oriental medicine, the fruit of Forsythia suspensa has been used as a nutritional supplement to alleviate inflammation and treat gastrointestinal diseases. However, there is no information available on its beneficial effects on bone. We investigated the beneficial effects of F. suspensa water extract (WFS) on osteoclast differentiation and bone loss. The microarchitecture of trabecular bone was analyzed by micro-computed tomography. Osteoclast differentiation was evaluated based on tartrate-resistant alkaline phosphatase activity, and bone resorption activity was examined on a bone-like mineral surface. The mechanism of action of WFS was assessed by evaluating the expression and activation of signaling molecules. Phytochemical constituents were identified and quantitated by ultrahigh-performance liquid chromatography-tandem mass spectrometry. WFS reduced ovariectomy-induced trabecular bone loss and inhibited receptor activator of nuclear factor-κB ligand (RANKL)-induced osteoclast formation and resorption activity. WFS suppressed RANKL-induced expression of nuclear factor of activated T cells cytoplasmic 1, a crucial transcription factor for osteoclast differentiation by decreasing c-Fos protein levels and suppressing the activation of p38 and c-Jun-N-terminal kinase. We also identified 12 phytochemicals in WFS including lignans, phenylethanoids, and flavonoids. Collectively, these results suggest that WFS inhibits osteoclast differentiation and can potentially be used to treat postmenopausal osteoporosis.
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Affiliation(s)
- Youn-Hwan Hwang
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseong-daero 1672, Yuseong-gu, Daejeon 34054, Korea
| | - Seon-A Jang
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseong-daero 1672, Yuseong-gu, Daejeon 34054, Korea
| | - Taesoo Kim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseong-daero 1672, Yuseong-gu, Daejeon 34054, Korea
| | - Hyunil Ha
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseong-daero 1672, Yuseong-gu, Daejeon 34054, Korea.
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