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Yorioka H, Otsu Y, Suzuki R, Matsunaga S, Nakano T, Abe S, Sasaki H. The influence of immediate occlusal loading on micro/nano-structure of peri-implant jaw bone in rats. Int J Implant Dent 2024; 10:24. [PMID: 38722448 PMCID: PMC11082111 DOI: 10.1186/s40729-024-00538-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 04/10/2024] [Indexed: 05/12/2024] Open
Abstract
PURPOSE The objective of the present study was to ascertain the effect of immediate occlusal loading after implant placement on osseointegration and the micro/nanostructure of the surrounding bone. METHODS After extraction of a rat maxillary right second molar, an implant was placed immediately with initial fixation (2 N< ). The implants were placed to avoid occlusal loading due to mastication, and in the loaded group, a superstructure was fabricated and subjected to occlusal loading. Bone morphometry, collagen fiber anisotropy, and biological apatite (BAp) crystallite alignment were quantitatively evaluated in both groups after extraction and fixation of the jaw bone at Days 7 and 21 after surgery. RESULTS Osseointegration was observed in both groups. Bone morphometry showed significant differences in bone volume, trabecular number, trabecular thickness and bone mineral density (BMD) at Days 21 postoperatively (P < 0.05). A significant difference was also found in the trabecular separation at Days 7 postoperatively (P < 0.05). In the evaluation of collagen fiber anisotropy, collagen fiber bundles running differently from the existing bone were observed in both groups. In terms of BAp crystallite alignment, a specific structure was observed in the reconstructed new bone after implantation, and preferential orientation of BAp crystallite alignment was observed in the longitudinal direction of the implants in the Day 21 postoperative loaded group. CONCLUSION When sufficient initial fixation is achieved at the time of dental implant placement, then the applied masticatory load may contribute to rapidly achieving not only bone volume, but also adequate bone quality after implant placement.
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Affiliation(s)
- Hiroaki Yorioka
- Department of Oral and Maxillofacial Implantology, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, 101-0061, Tokyo, Japan
- Oral Health Science Center, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, 101-0061, Tokyo, Japan
| | - Yuto Otsu
- Department of Oral and Maxillofacial Implantology, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, 101-0061, Tokyo, Japan
- Oral Health Science Center, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, 101-0061, Tokyo, Japan
| | - Ryu Suzuki
- Department of Anatomy, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, 101-0061, Tokyo, Japan
| | - Satoru Matsunaga
- Oral Health Science Center, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, 101-0061, Tokyo, Japan.
- Department of Anatomy, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, 101-0061, Tokyo, Japan.
| | - Takayoshi Nakano
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, 565-0871, Suita, Osaka, Japan
| | - Shinichi Abe
- Oral Health Science Center, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, 101-0061, Tokyo, Japan
- Department of Anatomy, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, 101-0061, Tokyo, Japan
| | - Hodaka Sasaki
- Department of Oral and Maxillofacial Implantology, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, 101-0061, Tokyo, Japan
- Oral Health Science Center, Tokyo Dental College, 2-9-18 Kandamisaki-cho, Chiyoda-ku, 101-0061, Tokyo, Japan
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Mihara Y, Ishimoto T, Ozasa R, Omura T, Yamato Y, Yamada T, Okamoto A, Matsuyama Y, Nakano T. Deterioration of apatite orientation in the cholecystokinin B receptor gene (Cckbr)-deficient mouse femurs. J Bone Miner Metab 2023; 41:752-759. [PMID: 37676507 DOI: 10.1007/s00774-023-01460-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 07/20/2023] [Indexed: 09/08/2023]
Abstract
INTRODUCTION The discrepancy between bone mineral density (BMD), the gold standard for bone assessment, and bone strength is a constraint in diagnosing bone function and determining treatment strategies for several bone diseases. Gastric hypochlorhydria induced by clinically used proton pump inhibitor (PPI) therapy indicates a discordance between changes in BMD and bone strength. Here, we used Cckbr-deficient mice with gastric hypochlorhydria to examine the effect of gastric hypochlorhydria on bone mass, BMD, and preferential orientation of the apatite crystallites, which is a strong indicator of bone strength. MATERIALS AND METHODS Cckbr-deficient mice were created, and their femurs were analyzed for BMD and preferential orientation of the apatite c-axis along the femoral long axis. RESULTS Cckbr-deficient mouse femurs displayed a slight osteoporotic bone loss at 18 weeks of age; however, BMD was comparable to that of wild-type mice. In contrast, apatite orientation in the femur mid-shaft significantly decreased from 9 to 18 weeks. To the best of our knowledge, this is the first report demonstrating the deterioration of apatite orientation in the bones of Cckbr-deficient mice. CONCLUSION Lesions in Cckbr-deficient mice occurred earlier in apatite orientation than in bone mass. Hence, bone apatite orientation may be a promising method for detecting hypochlorhydria-induced osteoporosis caused by PPI treatment and warrants urgent clinical applications.
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Affiliation(s)
- Yuki Mihara
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1, Handayama, Higashi-Ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Takuya Ishimoto
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Ryosuke Ozasa
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Takao Omura
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1, Handayama, Higashi-Ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Yu Yamato
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1, Handayama, Higashi-Ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Tomohiro Yamada
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1, Handayama, Higashi-Ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Ayako Okamoto
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1, Handayama, Higashi-Ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Yukihiro Matsuyama
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1, Handayama, Higashi-Ku, Hamamatsu, Shizuoka, 431-3192, Japan.
| | - Takayoshi Nakano
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka, 565-0871, Japan.
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Omidian H, Mfoafo K. Exploring the Potential of Nanotechnology in Pediatric Healthcare: Advances, Challenges, and Future Directions. Pharmaceutics 2023; 15:1583. [PMID: 37376032 DOI: 10.3390/pharmaceutics15061583] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/18/2023] [Accepted: 05/22/2023] [Indexed: 06/29/2023] Open
Abstract
The utilization of nanotechnology has brought about notable advancements in the field of pediatric medicine, providing novel approaches for drug delivery, disease diagnosis, and tissue engineering. Nanotechnology involves the manipulation of materials at the nanoscale, resulting in improved drug effectiveness and decreased toxicity. Numerous nanosystems, including nanoparticles, nanocapsules, and nanotubes, have been explored for their therapeutic potential in addressing pediatric diseases such as HIV, leukemia, and neuroblastoma. Nanotechnology has also shown promise in enhancing disease diagnosis accuracy, drug availability, and overcoming the blood-brain barrier obstacle in treating medulloblastoma. It is important to acknowledge that while nanotechnology offers significant opportunities, there are inherent risks and limitations associated with the use of nanoparticles. This review provides a comprehensive summary of the existing literature on nanotechnology in pediatric medicine, highlighting its potential to revolutionize pediatric healthcare while also recognizing the challenges and limitations that need to be addressed.
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Affiliation(s)
- Hossein Omidian
- College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL 33328, USA
| | - Kwadwo Mfoafo
- College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL 33328, USA
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Ishimoto T, Kobayashi Y, Takahata M, Ito M, Matsugaki A, Takahashi H, Watanabe R, Inoue T, Matsuzaka T, Ozasa R, Hanawa T, Yokota K, Nakashima Y, Nakano T. Outstanding in vivo mechanical integrity of additively manufactured spinal cages with a novel "honeycomb tree structure" design via guiding bone matrix orientation. Spine J 2022; 22:1742-1757. [PMID: 35675865 DOI: 10.1016/j.spinee.2022.05.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 05/31/2022] [Accepted: 05/31/2022] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Therapeutic devices for spinal disorders, such as spinal fusion cages, must be able to facilitate the maintenance and rapid recovery of spinal function. Therefore, it would be advantageous that future spinal fusion cages facilitate rapid recovery of spinal function without secondary surgery to harvest autologous bone. PURPOSE This study investigated a novel spinal cage configuration that achieves in vivo mechanical integrity as a devise/bone complex by inducing bone that mimicked the sound trabecular bone, hierarchically and anisotropically structured trabeculae strengthened with a preferentially oriented extracellular matrix. STUDY DESIGN/SETTINGS In vivo animal study. METHODS A cage possessing an anisotropic through-pore with a grooved substrate, that we termed "honeycomb tree structure," was designed for guiding bone matrix orientation; it was manufactured using a laser beam powder bed fusion method through an additive manufacturing processes. The newly designed cages were implanted into sheep vertebral bodies for 8 and 16 weeks. An autologous bone was not installed in the newly designed cage. A pull-out test was performed to evaluate the mechanical integrity of the cage/bone interface. Additionally, the preferential orientation of bone matrix consisting of collagen and apatite was determined. RESULTS The cage/host bone interface strength assessed by the maximum pull-out load for the novel cage without an autologous bone graft (3360±411 N) was significantly higher than that for the conventional cage using autologous bone (903±188 N) after only 8 weeks post-implantation. CONCLUSIONS These results highlight the potential of this novel cage to achieve functional fusion between the cage and host bone. Our study provides insight into the design of highly functional spinal devices based on the anisotropic nature of bone. CLINICAL SIGNIFICANCE The sheep spine is similar to the human spine in its stress condition and trabecular bone architecture and is widely recognized as a useful model for the human spine. The present design may be useful as a new spinal device for humans.
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Affiliation(s)
- Takuya Ishimoto
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka, 565-0871, Japan; Anisotropic Design and Additive Manufacturing Research Center, Osaka University, 2-1 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Yoshiya Kobayashi
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Masahiko Takahata
- Department of Orthopedic Surgery, Graduate School of Medicine, Hokkaido University, North-15, West-7, Kita-ku, Sapporo, Hokkaido, 060-8638, Japan
| | - Manabu Ito
- Department of Spine and Spinal Cord Disorders, National Hospital Organization, Hokkaido Medical Center, 5-7-1-1, Yamanote, Nishi-ku, Sapporo, Hokkaido, 063-0005, Japan
| | - Aira Matsugaki
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka, 565-0871, Japan; Anisotropic Design and Additive Manufacturing Research Center, Osaka University, 2-1 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Hiroyuki Takahashi
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka, 565-0871, Japan; Teijin Nakashima Medical Co., Ltd., 688-1 Joto-Kitagata, Higashi-ku, Okayama, 709-0625, Japan
| | - Ryota Watanabe
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka, 565-0871, Japan; Teijin Nakashima Medical Co., Ltd., 688-1 Joto-Kitagata, Higashi-ku, Okayama, 709-0625, Japan
| | - Takayuki Inoue
- Teijin Nakashima Medical Co., Ltd., 688-1 Joto-Kitagata, Higashi-ku, Okayama, 709-0625, Japan
| | - Tadaaki Matsuzaka
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Ryosuke Ozasa
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka, 565-0871, Japan; Anisotropic Design and Additive Manufacturing Research Center, Osaka University, 2-1 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Takao Hanawa
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka, 565-0871, Japan; Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Katsuhiko Yokota
- Teijin Nakashima Medical Co., Ltd., 688-1 Joto-Kitagata, Higashi-ku, Okayama, 709-0625, Japan
| | - Yoshio Nakashima
- Teijin Nakashima Medical Co., Ltd., 688-1 Joto-Kitagata, Higashi-ku, Okayama, 709-0625, Japan
| | - Takayoshi Nakano
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka, 565-0871, Japan; Anisotropic Design and Additive Manufacturing Research Center, Osaka University, 2-1 Yamada-Oka, Suita, Osaka, 565-0871, Japan.
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Ozasa R, Matsugaki A, Ishimoto T, Kamura S, Yoshida H, Magi M, Matsumoto Y, Sakuraba K, Fujimura K, Miyahara H, Nakano T. Bone fragility via degradation of bone quality featured by collagen/apatite micro-arrangement in human rheumatic arthritis. Bone 2022; 155:116261. [PMID: 34826630 DOI: 10.1016/j.bone.2021.116261] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 12/20/2022]
Abstract
Although increased bone fragility is a well-recognized consequence in patients with rheumatoid arthritis (RA), the essential cause of degenerate bone strength remains unknown. This study aimed to determine factors contributing to bone dysfunction in RA by focusing on the bone matrix micro-arrangement, based on the preferential orientation of collagen and the related apatite c-axis as a bone quality index. The classical understanding of RA is limited to its severe pathological conditions associated with inflammation-induced bone loss. This study examined periarticular proximal tibiae from RA patients as compared with osteoarthritis (OA) patients as controls. Bone tissue material strength was disrupted in the RA group compared with the control. Collagen/apatite micro-arrangement and vBMD were significantly lower in the RA group, and the rate of decrease in apatite c-axis orientation (-45%) was larger than that in vBMD (-22%). Multiple regression analysis showed that the degree of apatite c-axis orientation (β = 0.52, p = 1.9 × 10-2) significantly contributed to RA-induced bone material impairment as well as vBMD (β = 0.46, p = 3.8 × 10-2). To the best of our knowledge, this is the first report to demonstrate that RA reduces bone material strength by deteriorating the micro-arrangement of collagen/apatite bone matrix, leading to decreased fracture resistance. Our findings represent the significance of bone quality-based analysis for precise evaluation and subsequent therapy of the integrity and soundness of the bone in patients with RA.
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Affiliation(s)
- Ryosuke Ozasa
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Aira Matsugaki
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takuya Ishimoto
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Satoshi Kamura
- Department of Orthopaedic Surgery, National Hospital Organization, Kyushu Medical Center, 1-8-1 Jigyouhama chuo-ku, Fukuoka, Fukuoka 811-1395, Japan
| | - Hiroto Yoshida
- Product Research Department, Kamakura Research Laboratories, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura, Kanagawa 247-8530, Japan
| | - Mayu Magi
- Product Research Department, Kamakura Research Laboratories, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura, Kanagawa 247-8530, Japan
| | - Yoshihiro Matsumoto
- Product Research Department, Kamakura Research Laboratories, Chugai Pharmaceutical Co., Ltd., 200 Kajiwara, Kamakura, Kanagawa 247-8530, Japan
| | - Koji Sakuraba
- Department of Orthopaedic Surgery, National Hospital Organization, Kyushu Medical Center, 1-8-1 Jigyouhama chuo-ku, Fukuoka, Fukuoka 811-1395, Japan
| | - Kenjiro Fujimura
- Department of Orthopaedic Surgery, National Hospital Organization, Kyushu Medical Center, 1-8-1 Jigyouhama chuo-ku, Fukuoka, Fukuoka 811-1395, Japan
| | - Hisaaki Miyahara
- Department of Orthopaedic Surgery, National Hospital Organization, Kyushu Medical Center, 1-8-1 Jigyouhama chuo-ku, Fukuoka, Fukuoka 811-1395, Japan
| | - Takayoshi Nakano
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
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Kawai MY, Ozasa R, Ishimoto T, Nakano T, Yamamoto H, Kashiwagi M, Yamanaka S, Nakao K, Maruyama H, Bessho K, Ohura K. Periodontal Tissue as a Biomaterial for Hard-Tissue Regeneration following bmp-2 Gene Transfer. MATERIALS 2022; 15:ma15030993. [PMID: 35160948 PMCID: PMC8840059 DOI: 10.3390/ma15030993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/15/2022] [Accepted: 01/20/2022] [Indexed: 01/25/2023]
Abstract
The application of periodontal tissue in regenerative medicine has gained increasing interest since it has a high potential to induce hard-tissue regeneration, and is easy to handle and graft to other areas of the oral cavity or tissues. Additionally, bone morphogenetic protein-2 (BMP-2) has a high potential to induce the differentiation of mesenchymal stem cells into osteogenic cells. We previously developed a system for a gene transfer to the periodontal tissues in animal models. In this study, we aimed to reveal the potential and efficiency of periodontal tissue as a biomaterial for hard-tissue regeneration following a bmp-2 gene transfer. A non-viral expression vector carrying bmp-2 was injected into the palate of the periodontal tissues of Wistar rats, followed by electroporation. The periodontal tissues were analyzed through bone morphometric analyses, including mineral apposition rate (MAR) determination and collagen micro-arrangement, which is a bone quality parameter, before and after a gene transfer. The MAR was significantly higher 3-6 d after the gene transfer than that before the gene transfer. Collagen orientation was normally maintained even after the bmp-2 gene transfer, suggesting that the bmp-2 gene transfer has no adverse effects on bone quality. Our results suggest that periodontal tissue electroporated with bmp-2 could be a novel biomaterial candidate for hard-tissue regeneration therapy.
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Affiliation(s)
- Mariko Yamamoto Kawai
- Department of Welfare, Kansai Women’s College, Osaka 582-0026, Japan
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan; (H.Y.); (M.K.); (S.Y.); (K.N.); (K.B.)
- Correspondence: ; Tel.: +81-72-977-6561; Fax: +81-72-977-9564
| | - Ryosuke Ozasa
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan; (R.O.); (T.I.); (T.N.)
| | - Takuya Ishimoto
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan; (R.O.); (T.I.); (T.N.)
- Center for Aluminum and Advanced Materials Research and International Collaboration, School of Sustainable Design, University of Toyama, Toyama 930-8555, Japan
| | - Takayoshi Nakano
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan; (R.O.); (T.I.); (T.N.)
| | - Hiromitsu Yamamoto
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan; (H.Y.); (M.K.); (S.Y.); (K.N.); (K.B.)
| | - Marina Kashiwagi
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan; (H.Y.); (M.K.); (S.Y.); (K.N.); (K.B.)
| | - Shigeki Yamanaka
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan; (H.Y.); (M.K.); (S.Y.); (K.N.); (K.B.)
| | - Kazumasa Nakao
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan; (H.Y.); (M.K.); (S.Y.); (K.N.); (K.B.)
| | - Hiroki Maruyama
- Department of Clinical Nephroscience, Graduate School of Medicine and Dental Sciences, Niigata University, Niigata 951-8501, Japan;
| | - Kazuhisa Bessho
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan; (H.Y.); (M.K.); (S.Y.); (K.N.); (K.B.)
| | - Kiyoshi Ohura
- Department of Nursing, Taisei Gakuin University, Osaka 587-8555, Japan;
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Superior Alignment of Human iPSC-Osteoblasts Associated with Focal Adhesion Formation Stimulated by Oriented Collagen Scaffold. Int J Mol Sci 2021; 22:ijms22126232. [PMID: 34207766 PMCID: PMC8228163 DOI: 10.3390/ijms22126232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/05/2021] [Accepted: 06/07/2021] [Indexed: 12/17/2022] Open
Abstract
Human-induced pluripotent stem cells (hiPSCs) can be applied in patient-specific cell therapy to regenerate lost tissue or organ function. Anisotropic control of the structural organization in the newly generated bone matrix is pivotal for functional reconstruction during bone tissue regeneration. Recently, we revealed that hiPSC-derived osteoblasts (hiPSC-Obs) exhibit preferential alignment and organize in highly ordered bone matrices along a bone-mimetic collagen scaffold, indicating their critical role in regulating the unidirectional cellular arrangement, as well as the structural organization of regenerated bone tissue. However, it remains unclear how hiPSCs exhibit the cell properties required for oriented tissue construction. The present study aimed to characterize the properties of hiPSCs-Obs and those of their focal adhesions (FAs), which mediate the structural relationship between cells and the matrix. Our in vitro anisotropic cell culture system revealed the superior adhesion behavior of hiPSC-Obs, which exhibited accelerated cell proliferation and better cell alignment along the collagen axis compared to normal human osteoblasts. Notably, the oriented collagen scaffold stimulated FA formation along the scaffold collagen orientation. This is the first report of the superior cell adhesion behavior of hiPSC-Obs associated with the promotion of FA assembly along an anisotropic scaffold. These findings suggest a promising role for hiPSCs in enabling anisotropic bone microstructural regeneration.
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Hirose K, Ishimoto T, Usami Y, Sato S, Oya K, Nakano T, Komori T, Toyosawa S. Overexpression of Fam20C in osteoblast in vivo leads to increased cortical bone formation and osteoclastic bone resorption. Bone 2020; 138:115414. [PMID: 32416287 DOI: 10.1016/j.bone.2020.115414] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/10/2020] [Accepted: 05/11/2020] [Indexed: 01/03/2023]
Abstract
Fam20C, which phosphorylates many secretory proteins with S-x-E/pS motifs, is highly expressed in bone and tooth tissues, implying that Fam20C-mediated phosphorylation is critical for regulation of these mineralized tissues. Previous studies of Fam20C-deficient mice revealed that Fam20C plays important roles in bone formation and mineralization. However, Fam20C-deficient mice develop hypophosphatemia, a systemic factor that masks the local effect of Fam20C in the bone tissue; consequently, the local role of Fam20C remains unknown. To elucidate the local function of Fam20C in bone tissue, we studied osteoblast-specific Fam20C transgenic (Fam20C-Tg) mice, which have no alteration in serum calcium and phosphate levels. Fam20C-Tg mice had more highly phosphorylated proteins in bone tissue than wild-type mice. In cortical bone of Fam20C-Tg mice, bone volume, mineralization surface (MS/BS), and mineral apposition rate (MAR) were elevated; in addition, the transgenic mice had an elevated number of vascular canals, resulting in an increased cortical porosity. Osteocyte number was elevated in the transgenics, but osteoblast number was unchanged. The microstructure of bone matrix characterized by the preferential orientation of collagen and apatite, was degraded and thus the mechanical function of bone material was deteriorated. In trabecular bone of Fam20C-Tg mice, bone volume was reduced, whereas MS/BS and MAR were unchanged. Osteoclast number was elevated and eroded surface area was non-significantly elevated with an increased serum CTX-I level, whereas osteoblast number was unchanged. These findings indicated that Fam20C overexpression in osteoblasts promotes cortical bone formation by increasing MS/BS and MAR and promoting osteocyte differentiation, but does not affect trabecular bone formation. Furthermore, Fam20C overexpression indirectly promotes osteoclastic bone resorption in cortical and trabecular bones. Our findings show that osteoblastic Fam20C-mediated phosphorylation in bone tissue regulates bone formation and resorption, and bone material quality.
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Affiliation(s)
- Katsutoshi Hirose
- Department of Oral Pathology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Takuya Ishimoto
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Yu Usami
- Department of Oral Pathology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Sunao Sato
- Department of Oral Pathology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Kaori Oya
- Clinical Laboratory, Osaka University Dental Hospital, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Takayoshi Nakano
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Toshihisa Komori
- Basic and Translational Research Center for Hard Tissue Disease, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8588, Japan.
| | - Satoru Toyosawa
- Department of Oral Pathology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
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Live Fluorescent Staining Platform for Drug-Screening and Mechanism-Analysis in Zebrafish for Bone Mineralization. Molecules 2017; 22:molecules22122068. [PMID: 29186901 PMCID: PMC6149919 DOI: 10.3390/molecules22122068] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 11/10/2017] [Accepted: 11/22/2017] [Indexed: 11/21/2022] Open
Abstract
Currently, drug screening relies on cell-based experiments or on animal models to confirm biological effects. The mammalian system is considered too time-consuming, expensive and complex to perform high-throughput drug screening. There is a gap between in vitro cell-based models and the in vivo mammalian models. The zebrafish is an ideal model that could link preclinical toxicity screening with the drug development pipeline. Taking advantage of a highly conservative genomic, rapid development, large number of offspring, low cost and easy manipulation, zebrafish has been considered an excellent animal model for disease-based drug screening. In this study, zebrafish embryos were incubated with small molecular compounds that potentially affected bone mineralization in microplates. Two compounds of alendronate and dorsomorphin were used as positive and negative controls, respectively. The level of osteogenic mineralization was measured and quantified by using ImageJ software with fluorescent calcein-staining images. Among twenty-four tested compounds from the kinase inhibitor library, we identified two compounds, pentamidine and BML-267, which showed increased embryonic mineralization; while six compounds, RWJ-60475, levamisole HCL, tetramisole HCL, fenvalerate, NSC-663284, and BML-267ester, were inhibitory to bone mineralization. In addition, real time quantitative PCR (RT-qPCR) was performed to evaluate the biological pathways involved in bone metabolism at the molecular level. We confirmed that alendronate enhanced the level of bone mineralization by inhibiting osteoclast-related genes. In summary, our research established a simple method to screen potential bone metabolic drugs and to perform mechanism analysis for bone mineralization in vivo.
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10
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Ishimoto T, Sato B, Lee JW, Nakano T. Co-deteriorations of anisotropic extracellular matrix arrangement and intrinsic mechanical property in c-src deficient osteopetrotic mouse femur. Bone 2017; 103:216-223. [PMID: 28716550 DOI: 10.1016/j.bone.2017.06.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 06/21/2017] [Accepted: 06/28/2017] [Indexed: 01/22/2023]
Abstract
Osteopetrotic bone shows dissociation between bone mineral density (BMD) and bone strength. In this study, volumetric BMD; preferential orientation of the extracellular matrix (ECM), which is composed of collagen fibers and apatite crystals as bone material quality; and mechanical properties of the src-/- osteopetrotic and normal mouse femoral cortical bone were analyzed and compared with each other at a bone tissue level. The degree of preferential orientation of ECM along the femoral long axis was significantly decreased in the src-/- mice femur, suggesting deteriorated bone quality. Young's modulus, as a tissue-level mechanical property analyzed by nano-indentation technique along the long bone direction, also was decreased in the src-/- mice cortical femur, in spite of the similar volumetric cortical BMD. To the best of our knowledge, this is the first report to demonstrate the synchronous deterioration of Young's modulus and anisotropic ECM organization in the src-/- osteopetrotic mouse bone. These results indicate that the deterioration of the preferential ECM orientation is one major cause of the impaired mechanical property in the src-/- mouse bone.
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Affiliation(s)
- Takuya Ishimoto
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - Bunji Sato
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka 565-0871, Japan
| | - Jee-Wook Lee
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka 565-0871, Japan; School of Advanced Materials Engineering, Center for Advanced Materials Technology, Kookmin University, 861-1, Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Republic of Korea
| | - Takayoshi Nakano
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka 565-0871, Japan.
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Cho DC, Ryu K, Kim KT, Sung JK. The Therapeutic Effects of Combination Therapy with Curcumin and Alendronate on Spine Fusion Surgery in the Ovariectomized Rats. KOREAN JOURNAL OF SPINE 2017; 14:35-40. [PMID: 28704906 PMCID: PMC5518429 DOI: 10.14245/kjs.2017.14.2.35] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 06/20/2017] [Accepted: 06/22/2017] [Indexed: 12/11/2022]
Abstract
Objective The purpose of this study was to evaluate the therapeutic effects of combination therapy with curcumin and alendronate on spine fusion surgery in ovariectomized rats. Methods Thirty-two female Sprague-Dawley rats (12 weeks old) underwent bilateral ovariectomy (OVX). Eight weeks after surgery, animals underwent intertransverse spine fusion at L4–5. The rats were randomly distributed amongst 4 groups; untreated OVX group, curcumin administered group, alendronate administered group, and the combination therapy group. At 8 weeks after fusion surgery, the animals were sacrificed and the fusion mass was assessed by manual palpation, radiographic scan, and micro-computed tomographic scan. In addition, mechanical strength was determined by a 3-point bending test. Results Based on the results of manual palpation testing and 3-dimensional micro-computed tomography scanning, solid bone fusion rate was 50% (4 of 8) in the OVX group, 75% (6 of 8) in the alendronate-only and curcumin-only group, and 87.5% (7 of 8) in the combination therapy group, respectively. The combination therapy group had a higher fusion rate compared with the other treatment groups, though not statistically significantly (p>0.05). And the combination therapy group had a significant increase in fusion volume at 8 weeks after spine fusion surgery compared with curcumin-only group (p=0.039). The 3-point bending test showed that combination therapy group had a significantly greater maximal load value compared to that of curcumin-only group (p=0.024). Conclusion The present study demonstrated that additional treatment of curcumin and alendronate after spine fusion surgery in rat can promote higher fusion volume, and improve bone mechanical strength.
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Affiliation(s)
- Dae-Chul Cho
- Department of Neurosurgery, Kyungpook National University School of Medicine, Daegu, Korea
| | - Kyoungsu Ryu
- Department of Neurosurgery, Halla Hospital, Jeju, Korea
| | - Kyoung-Tae Kim
- Department of Neurosurgery, Kyungpook National University School of Medicine, Daegu, Korea
| | - Joo-Kyung Sung
- Department of Neurosurgery, Kyungpook National University School of Medicine, Daegu, Korea
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Kuroshima S, Kaku M, Ishimoto T, Sasaki M, Nakano T, Sawase T. A paradigm shift for bone quality in dentistry: A literature review. J Prosthodont Res 2017. [PMID: 28633987 DOI: 10.1016/j.jpor.2017.05.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
PURPOSE The aim of this study was to present the current concept of bone quality based on the proposal by the National Institutes of Health (NIH) and some of the cellular and molecular factors that affect bone quality. STUDY SELECTION This is a literature review which focuses on collagen, biological apatite (BAp), and bone cells such as osteoblasts and osteocytes. RESULTS In dentistry, the term "bone quality" has long been considered to be synonymous with bone mineral density (BMD) based on radiographic and sensible evaluations. In 2000, the NIH proposed the concept of bone quality as "the sum of all characteristics of bone that influence the bone's resistance to fracture," which is completely independent of BMD. The NIH defines bone quality as comprising bone architecture, bone turnover, bone mineralization, and micro-damage accumulation. Moreover, our investigations have demonstrated that BAp, collagen, and bone cells such as osteoblasts and osteocytes play essential roles in controlling the current concept of bone quality in bone around hip and dental implants. CONCLUSION The current concept of bone quality is crucial for understanding bone mechanical functions. BAp, collagen and osteocytes are the main factors affecting bone quality. Moreover, mechanical loading dynamically adapts bone quality. Understanding the current concept of bone quality is required in dentistry.
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Affiliation(s)
- Shinichiro Kuroshima
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1, Sakamoto, Nagasaki-city, Nagasaki 852-8588, Japan.
| | - Masaru Kaku
- Division of Bio-prosthodontics, Graduate School of Medical and Dental Science, Niigata University, 2-5274, Gakkocho-dori, Chuo-ku, Niigata-City, Niigata 951-8514, Japan
| | - Takuya Ishimoto
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita-city, Osaka 565-0871, Japan
| | - Muneteru Sasaki
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1, Sakamoto, Nagasaki-city, Nagasaki 852-8588, Japan
| | - Takayoshi Nakano
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita-city, Osaka 565-0871, Japan
| | - Takashi Sawase
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1, Sakamoto, Nagasaki-city, Nagasaki 852-8588, Japan
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Papanna MC, Tafazal S, Bell MJ, Giles SN, Fernandes JA. Femoral neck fractures in osteogenesis imperfecta treated with bisphosphonates. J Child Orthop 2017; 11:191-194. [PMID: 28828062 PMCID: PMC5548034 DOI: 10.1302/1863-2548.11.160212] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
PURPOSE Osteogenesis imperfecta (OI) is a condition characterised by bone fragility and multiple fractures, which cause considerable morbidity in the affected patients. Most cases are associated with mutations in one of the type I collagen genes. Recently, bisphosponates have been used widely to reduce pain and the incidence of fragility fractures in OI in children, even though there have been concerns raised regarding the long-term complications of it due to their effect on the bone. The fragility fractures involving the neck of the femur in children with intramedullary rods in the femoral shaft are very difficult to treat. Although these fractures are frequently un-displaced, they require optimal internal fixation to achieve fracture union. The aim of this study was to assess the clinical and radiological outcomes of OI patients with intracapsular femoral neck fracture treated with headless compression screws. METHOD AND RESULTS At our institute, we identified seven patients (11 hips) with OI who underwent internal fixation with headless compression screws for a neck of femur fracture between June 2010 and Dec 2012. The time to fractures healing was on average 14 weeks (12 to 16). All patients gained their pre-injury ambulatory status. CONCLUSION It is very challenging and technically demanding for orthopaedic surgeons when treating the fragility fracture of the neck of femur in patients with intramedullary rod in the femoral shaft. The published data regarding the management of these complex conditions are very limited. We describe our experience with the technique of percutaneous headless compression screw fixation for treating the femoral neck fractures in OI patients.
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Affiliation(s)
- M. C. Papanna
- Department of Trauma and Orthopaedics, Northern General Hospital, Sheffield, S5 7AU, UK,Correspondence should be sent to: Mr M.C. Papanna, Department of Trauma and Orthopaedics, Northern General Hospital, Sheffield, S5 7AU, UK. E-mail:
| | - S. Tafazal
- Department of Trauma and Orthopaedics, Sheffield Children’s Hospital, Sheffield, S10 2TH, UK
| | - M. J. Bell
- Department of Trauma and Orthopaedics, Sheffield Children’s Hospital, Sheffield, S10 2TH, UK
| | - S. N. Giles
- Department of Trauma and Orthopaedics, Sheffield Children’s Hospital, Sheffield, S10 2TH, UK
| | - J. A. Fernandes
- Department of Trauma and Orthopaedics, Sheffield Children’s Hospital, Sheffield, S10 2TH, UK
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Lee JW, Kobayashi A, Nakano T. Crystallographic orientation of the c-axis of biological apatite as a new index of the quality of subchondral bone in knee joint osteoarthritis. J Bone Miner Metab 2017; 35:308-314. [PMID: 27026432 DOI: 10.1007/s00774-016-0754-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Accepted: 03/06/2016] [Indexed: 10/22/2022]
Abstract
The aim of the present study was to investigate the preferred orientation of biological apatite (BAp) as a new index of the quality of subchondral bone (SB) in knee joint osteoarthritis (OA). Ten OA and five normal knee joints were obtained. Thickness, quantity and bone mineral density (BMD) of SB were analyzed at the medial condyle of the femur in dry conditions by peripheral quantitative computed tomography. In addition, the preferred crystallographic orientation of the c-axis of BAp was evaluated as bone quality parameter using a microbeam X-ray diffractometer technique. BMD and thickness of SB were significantly increased in OA specimens compared to normal knee specimens (P < 0.01), and the preferred orientation of the c-axis of BAp along the normal direction of SB surface was significantly higher in OA specimens (P < 0.01), reflecting the change in stress of concentration in the pathological portion without cartilage. SB sclerosis in OA results in both proliferation of bone tissues and enhanced degree of preferential alignment of the c-axis of BAp. Our findings could have major implications for the diagnosis of clinical studies, including pathologic elucidation in OA.
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Affiliation(s)
- Jee-Wook Lee
- School of Advanced Materials Engineering, Kookmin University, Seoul, 136-702, Korea
| | - Akio Kobayashi
- Department of Orthopaedic Surgery, Osaka City University, Graduate School of Medicine, Osaka, 545-8585, Japan
| | - Takayoshi Nakano
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Suita, 565-0871, Japan.
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15
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Sekita A, Matsugaki A, Nakano T. Disruption of collagen/apatite alignment impairs bone mechanical function in osteoblastic metastasis induced by prostate cancer. Bone 2017; 97:83-93. [PMID: 28069516 DOI: 10.1016/j.bone.2017.01.004] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Revised: 01/05/2017] [Accepted: 01/05/2017] [Indexed: 01/22/2023]
Abstract
Prostate cancer (PCa) frequently metastasizes to the bone, generally inducing osteoblastic alterations that increase bone brittleness. Although there is growing interest in the management of the physical capability of patients with bone metastasis, the mechanism underlying the impairment of bone mechanical function remains unclear. The alignment of both collagen fibrils and biological apatite (BAp) c-axis, together with bone mineral density, is one of the strongest contributors to bone mechanical function. In this study, we analyzed the bone microstructure of the mouse femurs with and without PCa cell inoculation. Histological assessment revealed that the bone-forming pattern in the PCa-bearing bone was non-directional, resulting in a spongious structure, whereas that in the control bone was unidirectional and layer-by-layer, resulting in a compact lamellar structure. The degree of preferential alignment of collagen fibrils and BAp, which was evaluated by quantitative polarized microscopy and microbeam X-ray diffraction, respectively, were significantly lower in the PCa-bearing bone than in the control bone. Material parameters including Young's modulus and toughness, measured by the three-point bending test, were simultaneously decreased in the PCa-bearing bone. Specifically, there was a significant positive correlation between the degree of BAp c-axis orientation and Young's modulus. In conclusion, the impairment of mechanical function in the PCa-bearing bone is attributable to disruption of the anisotropic microstructure of bone in multiple phases. This is the first report demonstrating that cancer bone metastasis induces disruption of the collagen/BAp alignment in long bones, thereby impairing their mechanical function.
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Affiliation(s)
- Aiko Sekita
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Aira Matsugaki
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Takayoshi Nakano
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.
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Vuorimies I, Mäyränpää MK, Valta H, Kröger H, Toiviainen-Salo S, Mäkitie O. Bisphosphonate Treatment and the Characteristics of Femoral Fractures in Children With Osteogenesis Imperfecta. J Clin Endocrinol Metab 2017; 102:1333-1339. [PMID: 28323993 DOI: 10.1210/jc.2016-3745] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2016] [Accepted: 01/12/2017] [Indexed: 01/08/2023]
Abstract
CONTEXT The short-term benefits of bisphosphonates (BPs) are evident in the treatment of children with osteogenesis imperfecta (OI), but some concerns related to long-term effects remain. OBJECTIVE To elucidate the effect of BPs on characteristics of femoral fractures in children with OI. DESIGN AND SETTING Retrospective cohort study at a university hospital. PATIENTS AND MAIN OUTCOME MEASURE The study included 93 patients with OI. We recorded fracture histories and analyzed all femoral fractures for location and fracture type using radiographs obtained at fracture diagnosis. Effects of BPs were evaluated by comparing fracture characteristics in three groups: patients (1) naive to BPs, (2) receiving ongoing BP treatment, and (3) whose treatment was discontinued. RESULTS In total, 127 femoral fractures occurred in 24 patients. Of the fractures, 63 (50%) occurred in patients naive to BPs, 44 (35%) during BP treatment, and 20 (16%) after treatment discontinuation. Mid or distal shaft fractures were most common (41%), followed by subtrochanteric (33%) and distal (20%) fractures. Almost all fractures were transverse (65%) or oblique (28%). The pattern of femoral fractures was similar in all three BP treatment groups (P = 0.78 for location; P = 0.35 for fracture type) and was not related to cumulative BP dose. Instead, OI type correlated with fracture characteristics, and distal location and transverse configuration were more common in the more severe types III and IV compared with type I OI. CONCLUSION Characteristics of femoral fractures in children with OI are affected by OI type but not by BP exposure.
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Affiliation(s)
- Ilkka Vuorimies
- Children's Hospital and
- Folkhälsan Institute of Genetics, 00029 Helsinki, Finland
| | - Mervi K Mäyränpää
- Department of Pediatric Radiology, Helsinki Medical Imaging Center, University of Helsinki and Helsinki University Hospital, 00029 Helsinki, Finland
| | | | - Heikki Kröger
- Bone and Cartilage Research Unit, University of Eastern Finland and Kuopio University Hospital, 70029 Kuopio, Finland
| | - Sanna Toiviainen-Salo
- Department of Pediatric Radiology, Helsinki Medical Imaging Center, University of Helsinki and Helsinki University Hospital, 00029 Helsinki, Finland
| | - Outi Mäkitie
- Children's Hospital and
- Folkhälsan Institute of Genetics, 00029 Helsinki, Finland
- Center for Molecular Medicine, Karolinska Institutet, and Clinical Genetics, Karolinska University Hospital, 17176 Stockholm, Sweden
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Abstract
OBJECTIVE Due to accumulation in the bone matrix and a half-life of at least 10 years, it is important to understand the cellular impact of bisphosphonates (BPs). This study assessed the effects of alendronate (ALN) on human primary osteoblasts. MATERIAL AND METHODS Osteoblasts were incubated with ALN (5, 20 and 100 μM), and both cells and cell culture media were harvested after d 1, 3, 7 or 14. Proliferation was evaluated by 3H-thymidine incorporation and tetrazolium dye (MTT) colorimetric assay, and viability by the lactate dehydrogenase (LDH) activity in the medium. Differentiation was evaluated using protein Luminex multiplex assays and RT-PCR. RESULTS ALN had no significant effects on cell viability. The lower concentrations enhanced the proliferation, whereas 100 μM diminished the proliferation. mRNA expression of osteocalcin (OC), alkaline phosphatase (ALP) and α-1 type 1 collagen were reduced, whereas ALN enhanced the expression of leptin mRNA and the secretion of interleukin-8 (IL-8) and regulated on activation normal T cell expressed and secreted (RANTES). CONCLUSIONS ALN enhanced the secretion of immune factors from human osteoblasts. Combined with a lower rate of proliferation and a decline in differentiation, this indicates that higher dosages or accumulation may cause undesirable local changes in bone.
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Olejnik C, Falgayrac G, During A, Cortet B, Penel G. Doses effects of zoledronic acid on mineral apatite and collagen quality of newly-formed bone in the rat's calvaria defect. Bone 2016; 89:32-39. [PMID: 27168397 DOI: 10.1016/j.bone.2016.05.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 04/18/2016] [Accepted: 05/05/2016] [Indexed: 01/12/2023]
Abstract
Due to their inhibitory effects on resorption, bisphosphonates are widely used in the treatment of diseases associated to an extensive bone loss. Yet, little is known about bisphosphonates effects on newly-formed bone quality. In the present study, adult male Sprague-Dawley rats (n=80) with a bone defect calvaria area were used and short-term effects of zoledronic acid (ZA) were studied on the healing bone area. Three ZA treatments were tested by using either: 1°) a low single dose (120μgZA/kg, n=10; equivalent to human osteoporosis treatment), 2°) a low fractionated doses (20μgZA/kg daily for 6days either a total of 120μg/kg, n=15), and 3°) a high fractionated doses, (100μgZA/kg weekly for 6weeks, n=15; equivalent to 6months of human bone metastasis treatment). For each treatment, a control "vehicle" treatment was performed (with an identical number of rats). After ZA administration, the intrinsic bone material properties were evaluated by quantitative backscattered electron imaging (qBEI) and Raman microspectroscopy. Neither single nor fractionated low ZA doses modify the intrinsic bone material properties of the newly-formed bone compared to their respective control animals. On the opposite, the high ZA treatment resulted in a significant decrease of the crystallinity (-25%, P< 0.05) and of the hydroxyproline-to-proline ratio (-30%, P<0.05) in newly-formed bones. Moreover, with the high ZA treatment, the crystallinity was positively correlated with the hydroxyproline-to-proline ratio (ρ=0.78, P<0.0001). The present data highlight new properties for ZA on bone formation in a craniofacial defect model. As such, ZA at high doses disrupted the apatite crystal organization. In addition, we report here for the first time that high ZA doses decreased the hydroxyproline-to-proline ratio suggesting that ZA may affect the early collagen organization during the bone healing.
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Affiliation(s)
- Cécile Olejnik
- Université de Lille, EA 4490 PMOI, F-59000 Lille, France; Faculté de Chirurgie Dentaire, Place de Verdun, F-59000 Lille, France; Service d'Odontologie, Centre Abel Caumartin, CHRU de Lille, F-59000 Lille, France.
| | - Guillaume Falgayrac
- Université de Lille, EA 4490 PMOI, F-59000 Lille, France; Faculté de Chirurgie Dentaire, Place de Verdun, F-59000 Lille, France
| | - Alexandrine During
- Université de Lille, EA 4490 PMOI, F-59000 Lille, France; Faculté de Chirurgie Dentaire, Place de Verdun, F-59000 Lille, France
| | - Bernard Cortet
- Université de Lille, EA 4490 PMOI, F-59000 Lille, France; Service de Rhumatologie, Hôpital Roger Salengro, CHRU de Lille, F-59000 Lille, France
| | - Guillaume Penel
- Université de Lille, EA 4490 PMOI, F-59000 Lille, France; Faculté de Chirurgie Dentaire, Place de Verdun, F-59000 Lille, France; Service d'Odontologie, Centre Abel Caumartin, CHRU de Lille, F-59000 Lille, France
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Akyol UK, Sipal S, Demirci E, Gungormus M. The influence of low-level laser therapy with alendronate irrigation on healing of bone defects in rats. Lasers Med Sci 2015; 30:1141-6. [DOI: 10.1007/s10103-015-1720-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 02/05/2015] [Indexed: 11/29/2022]
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20
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Harrington J, Sochett E, Howard A. Update on the evaluation and treatment of osteogenesis imperfecta. Pediatr Clin North Am 2014; 61:1243-57. [PMID: 25439022 DOI: 10.1016/j.pcl.2014.08.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Osteogenesis imperfecta (OI) is a heritable bone fragility disorder that presents with a wide clinical phenotype spectrum: from perinatal lethality and severe deformities to very mild forms without fractures. Most cases of OI are due to autosomal dominant mutations of the type I collagen genes. A multidisciplinary approach with rehabilitation, orthopedic surgery, and consideration of medical therapy with bisphosphonates underpins current management. Greater understanding of the pathogenesis of OI may lead to novel, therapeutic approaches to help improve clinical symptoms of children with OI in the future.
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Affiliation(s)
- Jennifer Harrington
- Division of Endocrinology, Department of Pediatrics, Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, Ontario M5G1X8, Canada
| | - Etienne Sochett
- Division of Endocrinology, Department of Pediatrics, Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, Ontario M5G1X8, Canada
| | - Andrew Howard
- Division of Orthopedic Surgery, Department of Pediatrics, Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, Ontario M5G1X8, Canada.
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Acerbo AS, Kwaczala AT, Yang L, Judex S, Miller LM. Alterations in collagen and mineral nanostructure observed in osteoporosis and pharmaceutical treatments using simultaneous small- and wide-angle X-ray scattering. Calcif Tissue Int 2014; 95:446-56. [PMID: 25190190 DOI: 10.1007/s00223-014-9913-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 08/22/2014] [Indexed: 12/27/2022]
Abstract
The influence of the macroscale material properties of bone on its mechanical competence has been extensively investigated, but less is known about possible contributions from bone's nanoscale material properties. These nanoscale properties, particularly the collagen network and the size and shape of hydroxyapatite mineral crystals, may be affected by aging, mechanical loading, and diseases including osteoporosis. Here, changes to the collagen and mineral properties of cortical bone induced by osteoporosis and subsequent pharmaceutical treatments were investigated by simultaneous small- and wide-angle X-ray scattering (SAXS/WAXS) microbeam mapping. Adult rats (6 months old) were ovariectomized and treated with alendronate, parathyroid hormone, or sodium fluoride, and compared to untreated ovariectomized and age-matched controls. Scattering data from tibial cortical bone showed that osteoporosis increased collagen alignment in existing intracortical bone, while this effect was mitigated in the alendronate and sodium fluoride groups though by different mechanisms. Further, mineral crystal lengths in newly formed cortical bone were smaller in animals with osteoporosis, but existing cortical bone was not altered. Subsequent treatment with alendronate mitigated changes in crystal lengths. Together, these results suggest that osteoporosis may alter the collagen alignment and mineral geometry in bone formed before and after the onset of this disease, and that osteoporosis treatments may differentially rescue these changes.
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Affiliation(s)
- Alvin S Acerbo
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
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Soto SA, Chiappe Barbará A. Bisphosphonates: Pharmacology and Clinical Approach to Their Use in Equine Osteoarticular Diseases. J Equine Vet Sci 2014. [DOI: 10.1016/j.jevs.2014.01.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Cho DC, Jung HS, Kim KT, Jeon Y, Sung JK, Hwang JH. Therapeutic advantages of treatment of high-dose curcumin in the ovariectomized rat. J Korean Neurosurg Soc 2013; 54:461-6. [PMID: 24527187 PMCID: PMC3921272 DOI: 10.3340/jkns.2013.54.6.461] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 06/17/2013] [Accepted: 12/12/2013] [Indexed: 11/27/2022] Open
Abstract
Objective Although curcumin has a protective effect on bone remodeling, appropriate therapeutic concentrations of curcumin are not well known as therapeutic drugs for osteoporosis. The purpose of this study was to compare the bone sparing effect of treatment of low-dose and high-dose curcumin after ovariectomy in rats. Methods Forty female Sprague-Dawley rats underwent either a sham operation (the sham group) or bilateral ovariectomy (OVX). The ovariectomized animals were randomly distributed among three groups; untreated OVX group, low-dose (10 mg/kg) curcumin administered group, and high-dose (50 mg/kg) curcumin group. At 4 and 8 weeks after surgery, serum biochemical markers of bone turnover were analyzed. Bone histomorphometric parameters of the 4th lumbar vertebrae were determined by micro-computed tomography (CT). In addition, mechanical strength was determined by a three-point bending test. Results High-dose curcumin group showed significantly lower osteocalcin, alkaline phosphatase, and the telopeptide fragment of type I collagen C-terminus concentration at 4 and 8 weeks compared with the untreated OVX group as well as low-dose curcumin group. In the analyses of micro-CT scans of 4th lumbar vertebrae, the high-dose curcumin treated group showed a significant increase in bone mineral densities (p=0.028) and cortical bone mineral densities (p=0.036) compared with the low-dose curcumin treated group. Only high-dose curcumin treated group had a significant increase of mechanical strength compared with the untreated OVX group (p=0.015). Conclusion The present study results demonstrat that a high-dose curcumin has therapeutic advantages over a low-dose curcumin of an antiresorptive effect on bone remodeling and improving bone mechanical strength.
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Affiliation(s)
- Dae-Chul Cho
- Department of Neurosurgery, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Hyun-Sik Jung
- Department of Neurosurgery, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Kyoung-Tae Kim
- Department of Neurosurgery, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Younghoon Jeon
- Department of Anesthesiology and Pain Medicine, School of Dentistry, Kyungpook National University, Daegu, Korea
| | - Joo-Kyung Sung
- Department of Neurosurgery, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Jeong-Hyun Hwang
- Department of Neurosurgery, School of Medicine, Kyungpook National University, Daegu, Korea
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Berti-Couto SA, Vasconcelos ACU, Iglesias JE, Figueiredo MAZ, Salum FG, Cherubini K. Diabetes mellitus and corticotherapy as risk factors for alendronate-related osteonecrosis of the jaws: a study in Wistar rats. Head Neck 2013; 36:84-93. [PMID: 23649954 DOI: 10.1002/hed.23260] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/22/2013] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND The purpose of this study was to investigate the influence of diabetes and corticotherapy on the development of osteonecrosis of the jaws associated with sodium alendronate. METHODS Rats were allocated into 4 groups of 11 animals each, representing different treatments: (1) alendronate; (2) alendronate and corticotherapy; (3) alendronate and diabetes; and (4) control. Tooth extractions were performed in all animals, and histological analysis was performed by hematoxylin and eosin staining and immunohistochemistry using anti-bone morphogenetic protein (BMP)-4 and anti-matrix metalloproteinase (MMP)-13 antibodies. RESULTS On hematoxylin and eosin analysis, proportions of inflammatory infiltrate, microbial colonies, and osteonecrosis were significantly greater in the diabetes group. BMP-4 expression in connective tissue was higher in the corticosteroid group than the alendronate group. There were no significant differences between the other groups. MMP-13 expression did not differ between the groups analyzed. CONCLUSION Diabetes but not corticotherapy is associated with jaw osteonecrosis in rats undergoing alendronate therapy and subjected to tooth extractions.
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Affiliation(s)
- Soraya A Berti-Couto
- Dental College, Pontifical Catholic University of Rio Grande do Sul, Hospital São Lucas, Porto Alegre, RS, Brazil
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Cho DC, Kim KT, Jeon Y, Sung JK. A synergistic bone sparing effect of curcumin and alendronate in ovariectomized rat. Acta Neurochir (Wien) 2012; 154:2215-23. [PMID: 23053289 DOI: 10.1007/s00701-012-1516-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2012] [Accepted: 09/25/2012] [Indexed: 02/01/2023]
Abstract
BACKGROUND The purpose of this study was to evaluate the therapeutic effects of combination therapy with curcumin and alendronate on bone remodeling after ovariectomy in rats. METHODS Eighty female Sprague-Dawley rats underwent either a sham operation (the sham group) or bilateral ovariectomy (OVX). The ovariectomized animals were randomly distributed amongst four groups: untreated OVX group, curcumin-administered group, alendronate-administered group, and the combination therapy group. At 8 and 12 weeks after surgery, rats from each of the groups were euthanized. Serum biochemical markers of bone turnover, including osteocalcin and alkaline phosphatase (ALP), and the telopeptide fragment of type I collagen C-terminus (CTX) were analyzed. Bone histomorphometric parameters of the 4th lumbar vertebrae were determined by micro-computed tomography (CT). In addition, mechanical strength was determined by a three-point bending test. RESULTS Serum biochemical markers of bone turnover in the experiment groups (curcumin administered group, alendronate administered group, and the combination therapy group) were significantly lower than in the untreated OVX group (p < 0.05). The combination therapy group had lower ALP and CTX-1 concentrations at 12 weeks, which were statistically significant compared with the curcumin only and the alendronate only group (p < 0.05). The combination therapy group had a significant increase in BMD at 8 weeks and Cr.BMD at 12 weeks compared with the curcumin-only group (p = 0.005 and p = 0.013, respectively). The three point bending test showed that the 4th lumbar vertebrae of the combination therapy group had a significantly greater maximal load value compared to that of the curcumin only and the alendronate only group (p < 0.05). CONCLUSIONS The present study demonstrated that combination therapy with a high dose of curcumin and a standard dose of alendronate has therapeutic advantages over curcumin or alendronate monotherapy, in terms of the synergistic antiresorptive effect on bone remodeling, and improving bone mechanical strength.
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Nicolaou N, Agrawal Y, Padman M, Fernandes JA, Bell MJ. Changing pattern of femoral fractures in osteogenesis imperfecta with prolonged use of bisphosphonates. J Child Orthop 2012; 6:21-7. [PMID: 23450103 PMCID: PMC3303010 DOI: 10.1007/s11832-011-0380-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Accepted: 12/30/2011] [Indexed: 02/03/2023] Open
Abstract
PURPOSE Osteogenesis imperfecta (OI) has been treated with bisphosphonates for many years, with some clear clinical benefits. In adults, there are reports of a new pattern of atraumatic subtrochanteric fractures with bisphosphonate treatment. This study assesses if bisphosphonate treatment leads to an altered pattern of femoral fractures. METHODS Retrospective review of imaging for a cohort of 176 bisphosphonate-treated OI patients to identify the locations of femoral fractures over a two-year period, as compared to a historical control group managed pre-bisphosphonates. RESULTS Sixteen femoral fractures were identified in this time period in the bisphosphonate-treated group. All but two were within the subtrochanteric region. In comparison, the historical group-composed of 26 femoral fractures-had a more widespread fracture pattern, with the most frequent location being the mid-diaphysis. Many of the subtrochanteric fractures in the treatment group occurred with minimal trauma. CONCLUSIONS It appears that concerns over the treatment of the adult osteoporotic population with bisphosphonates are amplified and mirrored in OI. It is possible that the high bending moments in the proximal femur together with altered mechanical properties of cortical bone secondary to the use of this group of drugs increase the risk of this type of injury, which warrants further modification of surgical management of the femur.
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Affiliation(s)
- N. Nicolaou
- Department of Orthopaedics, Sheffield Children’s Hospital, Western Bank, Sheffield, South Yorkshire UK
| | - Y. Agrawal
- Department of Orthopaedics, Sheffield Children’s Hospital, Western Bank, Sheffield, South Yorkshire UK
| | - M. Padman
- Department of Orthopaedics, Sheffield Children’s Hospital, Western Bank, Sheffield, South Yorkshire UK
| | - J. A. Fernandes
- Department of Orthopaedics, Sheffield Children’s Hospital, Western Bank, Sheffield, South Yorkshire UK
| | - M. J. Bell
- Department of Orthopaedics, Sheffield Children’s Hospital, Western Bank, Sheffield, South Yorkshire UK
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Zhou H, Lawrence JG, Touny AH, Bhaduri SB. Biomimetic coating of bisphosphonate incorporated CDHA on Ti6Al4V. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:365-374. [PMID: 22180142 DOI: 10.1007/s10856-011-4524-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2011] [Accepted: 11/23/2011] [Indexed: 05/31/2023]
Abstract
Bi-functional coatings of carbonated calcium deficient hydroxyapatite (CDHA) on Ti alloys were developed by using a biomimetic coating process. The bi-functionality was achieved by loading alendonate sodium (AS), an approved bisphosphonate drug used for the treatment of osteoporosis, into the inner layers of CDHA coatings. Three possible methods of loading AS into CDHA coatings were systematically studied and compared. The results indicated that the co-precipitation method had greater benefits and can modify the release profile of AS by incorporating AS in the inner layers of the coatings. As a preliminary study, the influences of applied AS dosage to CDHA coatings were evaluated using XRD and SEM. In vitro tests indicated that the AS content on CDHA coatings played a significant role, and optimum AS content in local area is beneficial for osteoblast cells proliferation. It is expected that the CDHA-AS coatings via the co-precipitation approach have potential for bone tissue engineering applications.
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Affiliation(s)
- Huan Zhou
- Department of Bioengineering, The University of Toledo, Toledo, OH, USA.
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Shen Y, Liu W, Wen C, Pan H, Wang T, Darvell BW, Lu WW, Huang W. Bone regeneration: importance of local pH—strontium-doped borosilicate scaffold. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm16141a] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Aghaloo TL, Kang B, Sung EC, Shoff M, Ronconi M, Gotcher JE, Bezouglaia O, Dry SM, Tetradis S. Periodontal disease and bisphosphonates induce osteonecrosis of the jaws in the rat. J Bone Miner Res 2011; 26:1871-82. [PMID: 21351151 PMCID: PMC3596511 DOI: 10.1002/jbmr.379] [Citation(s) in RCA: 167] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Bisphosphonates (BPs) are medications used commonly to treat primary and metastatic bone cancer, as well as osteoporosis. Although BPs improve bone mineral density, reduce fracture risk, and reduce hypercalcemia of malignancy, some patients develop BP-related osteonecrosis of the jaws (BRONJ). This devastating complication is defined as clinically exposed bone in the maxillofacial region for more than 8 weeks. Despite an increasing number of BRONJ cases since first reported, the disease pathophysiology remains largely unknown. Since published studies suggest a significant role for dental disease in the pathophysiology of BRONJ, we developed a BRONJ animal model where aggressive periodontal disease is induced by ligature placement around the crown of the right maxillary first molar in the presence of vehicle (veh) or zoledronic acid (ZA), a potent BP. Ligature placement induced significant alveolar bone loss, which was attenuated by ZA treatment. Osteonecrosis was observed associated with ligature-induced periodontitis in the ZA-treated group. This was seen as sequestration and extensive periosteal alveolar bone formation on micro-computed tomography (µCT) in the ligated site of BP-treated animals. Histologic examination confirmed these findings, seen as necrotic bone with diffuse loss of osteocytes and empty lacunae, rimming of the necrotic bone by squamous epithelium and inflammation, and exposure to the oral cavity. Importantly, the rat lesions were strikingly similar to those of BRONJ patients. Our data suggest that dental disease and potent BP therapy are sufficient for BRONJ development in the rat.
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Affiliation(s)
- Tara L Aghaloo
- Division of Diagnostic and Surgical Sciences, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Ben Kang
- Division of Diagnostic and Surgical Sciences, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Eric C Sung
- Division of Advanced Prosthodontics, Biomaterials, and Hospital Dentistry, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Michael Shoff
- Division of Diagnostic and Surgical Sciences, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Matthew Ronconi
- Division of Diagnostic and Surgical Sciences, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Jack E Gotcher
- Department of Oral and Maxillofacial Surgery, University of Tennessee Knoxville, Knoxville, TN, USA
| | - Olga Bezouglaia
- Division of Diagnostic and Surgical Sciences, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Sarah M Dry
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Sotirios Tetradis
- Division of Diagnostic and Surgical Sciences, UCLA School of Dentistry, Los Angeles, CA, USA
- Molecular Biology Institute, UCLA, Los Angeles, CA, USA
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Masuda T, Kawai T, Anada T, Kamakura S, Suzuki O. Quality of Regenerated Bone Enhanced by Implantation of Octacalcium Phosphate–Collagen Composite. Tissue Eng Part C Methods 2010; 16:471-8. [DOI: 10.1089/ten.tec.2009.0212] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Affiliation(s)
- Taisuke Masuda
- Division of Craniofacial Function Engineering (CFE), Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Tadashi Kawai
- Division of Craniofacial Function Engineering (CFE), Tohoku University Graduate School of Dentistry, Sendai, Japan
- Division of Oral Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Takahisa Anada
- Division of Craniofacial Function Engineering (CFE), Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Shinji Kamakura
- Bone Regenerative Engineering Laboratory, Tohoku University Graduate School of Biomedical Engineering, Sendai, Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering (CFE), Tohoku University Graduate School of Dentistry, Sendai, Japan
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Shiraishi A, Miyabe S, Nakano T, Umakoshi Y, Ito M, Mihara M. The combination therapy with alfacalcidol and risedronate improves the mechanical property in lumbar spine by affecting the material properties in an ovariectomized rat model of osteoporosis. BMC Musculoskelet Disord 2009; 10:66. [PMID: 19527501 PMCID: PMC2706792 DOI: 10.1186/1471-2474-10-66] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2008] [Accepted: 06/15/2009] [Indexed: 12/22/2022] Open
Abstract
Background We conducted the present study to investigate the therapeutic effects of a combination treatment of alfacalcidol (ALF) and risedronate (RIS) on the bone mechanical properties of bone and calcium (Ca) metabolism using an ovariectomized (OVX) rat model of osteoporosis. Methods Female Wistar rats were OVX- or sham-operated at 40 weeks of age. Twelve weeks post-surgery, rats were randomized into seven groups: 1) sham + vehicle, 2) OVX + vehicle, 3) OVX + ALF 0.025 μg/kg/day, 4) OVX + ALF 0.05 μg, 5) OVX + RIS 0.3 mg, 6) OVX + RIS 3.0 mg, 7) OVX + ALF 0.025 μg + RIS 0.3 mg. Each drug was administered orally five times a week for 12 weeks. After treatment, we evaluated the mechanical properties of the lumbar vertebra and femoral midshaft. In the lumbar vertebra, structural and material analyses were performed using micro-computed tomography (micro-CT) and microbeam X-ray diffraction (micro-XRD), respectively. Biochemical markers in serum and urine were also determined. Results (1) With respect to improvement in the mechanical strength of the lumbar spine and the femoral midshaft, the combination treatment of ALF and RIS at their sub-therapeutic doses was more effective than each administered as a monotherapy; (2) In the suppression of bone resorption and the amelioration of microstructural parameters, the effects of ALF and RIS were considered to be independent and additive; (3) The improvement of material properties, such as microstructural parameters and the biological apatite (Bap) c-axis orientation, contributed to the reinforcement of spinal strength; and (4) The combination treatment of ALF and RIS normalized urinary Ca excretion, suggesting that this treatment ameliorated the changes in Ca metabolism. Conclusion These results demonstrate that the combination treatment of ALF and RIS at their sub-therapeutic doses can improve the mechanical properties of the spine as well as the femur and ameliorate changes in Ca metabolism in an animal model of osteoporosis, suggesting that the combination treatment of ALF and RIS has a therapeutic advantage over each monotherapy for the treatment of osteoporosis.
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Affiliation(s)
- Ayako Shiraishi
- Product Research Department, Chugai Pharmaceutical Co, Ltd,, 1-135 Komakado, Gotemba, Shizuoka, 412-8513, Japan.
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Hagiwara H, Sugizaki T, Tsukamoto Y, Senoh E, Goto T, Ishihara Y. Effects of alkylphenols on bone metabolism in vivo and in vitro. Toxicol Lett 2008; 181:13-8. [DOI: 10.1016/j.toxlet.2008.06.863] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2008] [Revised: 06/13/2008] [Accepted: 06/13/2008] [Indexed: 10/21/2022]
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