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Hasegawa T, Yamamoto T, Hongo H, Yamamoto T, Haraguchi-Kitakamae M, Ishizu H, Shimizu T, Saito H, Sakai S, Yogo K, Matsumoto Y, Amizuka N. Eldecalcitol Induces Minimodeling-Based Bone Formation and Inhibits Sclerostin Synthesis Preferentially in the Epiphyses Rather than the Metaphyses of the Long Bones in Rats. Int J Mol Sci 2024; 25:4257. [PMID: 38673844 PMCID: PMC11050363 DOI: 10.3390/ijms25084257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 04/08/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024] Open
Abstract
This study aimed to examine minimodeling-based bone formation between the epiphyses and metaphyses of the long bones of eldecalcitol (ELD)-administered ovariectomized rats. Sixteen-week-old female rats were divided into four groups: sham-operated rats receiving vehicle (Sham group), ovariectomized (OVX) rats receiving vehicle (Vehicle group), or ELDs (30 or 90 ng/kg BW, respectively; ELD30 and ELD90 groups). ELD administration increased bone volume and trabecular thickness, reducing the number of osteoclasts in both the epiphyses and metaphyses of OVX rats. The Sham and Vehicle groups exhibited mainly remodeling-based bone formation in both regions. The epiphyses of the ELD groups showed a significantly higher frequency of minimodeling-based bone formation than remodeling-based bone formation. In contrast, the metaphyses exhibited significantly more minimodeling-based bone formation in the ELD90 group compared with the ELD30 group. However, there was no significant difference between minimodeling-based bone formation and remodeling-based bone formation in the ELD90 group. While the minimodeling-induced new bone contained few sclerostin-immunoreactive osteocytes, the underlying pre-existing bone harbored many. The percentage of sclerostin-positive osteocytes was significantly reduced in the minimodeling-induced bone in the epiphyses but not in the metaphyses of the ELD groups. Thus, it seems likely that ELD could induce minimodeling-based bone formation in the epiphyses rather than in the metaphyses, and that ELD-driven minimodeling may be associated with the inhibition of sclerostin synthesis.
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Affiliation(s)
- Tomoka Hasegawa
- Ultrastructure of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan; (T.Y.); (H.H.); (M.H.-K.); (H.I.); (N.A.)
| | - Tomomaya Yamamoto
- Ultrastructure of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan; (T.Y.); (H.H.); (M.H.-K.); (H.I.); (N.A.)
- Department of Dentistry, Japan Ground Self-Defense Force, Camp Shinmachi, Takasaki 370-1394, Japan
| | - Hiromi Hongo
- Ultrastructure of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan; (T.Y.); (H.H.); (M.H.-K.); (H.I.); (N.A.)
| | - Tsuneyuki Yamamoto
- Oral Functional Anatomy, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan;
| | - Mai Haraguchi-Kitakamae
- Ultrastructure of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan; (T.Y.); (H.H.); (M.H.-K.); (H.I.); (N.A.)
| | - Hotaka Ishizu
- Ultrastructure of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan; (T.Y.); (H.H.); (M.H.-K.); (H.I.); (N.A.)
- Orthopedics, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan;
| | - Tomohiro Shimizu
- Orthopedics, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan;
| | - Hitoshi Saito
- Chugai Pharmaceutical Co., Ltd., Tokyo 103-8324, Japan; (H.S.); (S.S.); (K.Y.); (Y.M.)
| | - Sadaoki Sakai
- Chugai Pharmaceutical Co., Ltd., Tokyo 103-8324, Japan; (H.S.); (S.S.); (K.Y.); (Y.M.)
| | - Kenji Yogo
- Chugai Pharmaceutical Co., Ltd., Tokyo 103-8324, Japan; (H.S.); (S.S.); (K.Y.); (Y.M.)
| | - Yoshihiro Matsumoto
- Chugai Pharmaceutical Co., Ltd., Tokyo 103-8324, Japan; (H.S.); (S.S.); (K.Y.); (Y.M.)
| | - Norio Amizuka
- Ultrastructure of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan; (T.Y.); (H.H.); (M.H.-K.); (H.I.); (N.A.)
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Yamamoto T, Maruoka H, Hongo H, Yoshino H, Haraguchi-Kitakamae M, Liu X, Yao Q, Li M, Amizuka N, Hasegawa T. Early gene expression profiles of anabolic and catabolic molecules in murine bone after a single PTH injection. J Oral Biosci 2023; 65:395-400. [PMID: 37595743 DOI: 10.1016/j.job.2023.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 08/02/2023] [Accepted: 08/10/2023] [Indexed: 08/20/2023]
Abstract
The current study examined the gene expression profiles of anabolic and catabolic molecules after a single parathyroid hormone (PTH) injection in mice. No significant changes were observed in alkaline phosphatase area/tissue volume, tartrate-resistant acid phosphatase-positive osteoclasts, or static bone histomorphometry parameters. However, a sudden and significant decrease in Runx2 expression occurred at 1.5 h post-injection followed by immediate elevation, while sclerostin level was initially downregulated but gradually recovered. Meanwhile, Rankl expression initially increased and then returned to baseline. The prolonged elevation of anabolic molecules and transient increase in catabolic molecules may contribute to the anabolic effect of PTH treatment.
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Affiliation(s)
- Tomomaya Yamamoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine, Hokkaido University, Japan; Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces, Sapporo, Japan
| | - Haruhi Maruoka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine, Hokkaido University, Japan
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine, Hokkaido University, Japan
| | - Hirona Yoshino
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine, Hokkaido University, Japan
| | - Mai Haraguchi-Kitakamae
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine, Hokkaido University, Japan; Division of Craniofacial Development and Tissue Biology, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Xuanyu Liu
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine, Hokkaido University, Japan
| | - Qi Yao
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine, Hokkaido University, Japan
| | - Minqi Li
- Center of Osteoporosis and Bone Mineral Research, Department of Bone Metabolism, School of Stomatology, Shandong University, Jinan, China
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine, Hokkaido University, Japan
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine, Hokkaido University, Japan.
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Yamamoto T, Abe M, Hongo H, Maruoka H, Yoshino H, Haraguchi-Kitakamae M, Udagawa N, Li M, Amizuka N, Hasegawa T. Differential osteoblastic activity in primary metaphyseal trabecular and secondary trabeculae of c-fos deficient mice. J Oral Biosci 2023; 65:265-272. [PMID: 37595744 DOI: 10.1016/j.job.2023.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/02/2023] [Accepted: 08/10/2023] [Indexed: 08/20/2023]
Abstract
OBJECTIVES It has been highlighted that osteoblastic activities in remodeling-based bone formation are coupled with osteoclastic bone resorption while those in modeling-based bone formation are independent of osteoclasts. This study aimed to verify whether modeling-based bone formation can occur in the absence of osteoclasts. METHODS We performed histochemical analyses on the bone of eight-week-old male wild-type and c-fos-/- mice. Histochemical analyses were conducted on primary trabeculae near the chondro-osseous junction (COJ), sites of modeling-based bone formation, and secondary trabeculae, sites of remodeling-based bone formation, in the femora and tibiae of mice. RESULTS Alkaline phosphatase (ALP) immunoreactivity, a marker of osteoblastic lineages, was observed in the metaphyseal trabeculae of wild-type mice, while ALP was scattered throughout the femora of c-fos-/- mice. PHOSPHO1, an enzyme involved in matrix vesicle-mediated mineralization, was predominantly detected in primary trabeculae and also within short lines of osteoblasts in secondary trabeculae of wild-type mice. In contrast, femora of c-fos-/- mice showed several patches of PHOSPHO1 positivity in the primary trabeculae, but there were hardly any patches of PHOSPHO1 in secondary trabeculae. Calcein labeling was consistently observed in primary trabeculae close to the COJ in both wild-type and c-fos-/- mice; however, calcein labeling in the secondary trabeculae was only detected in wild-type mice. Transmission electron microscopic examination demonstrated abundant rough endoplasmic reticulum in the osteoblasts in secondary trabeculae of wild-type mice, but not in those of c-fos-/- mice. CONCLUSIONS Osteoblastic activities at the sites of modeling-based bone formation may be maintained in the absence of osteoclasts.
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Affiliation(s)
- Tomomaya Yamamoto
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan; Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces, Sapporo, Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Haruhi Maruoka
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hirona Yoshino
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Mai Haraguchi-Kitakamae
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan; Division of Craniofacial Development and Tissue Biology, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Nobuyuki Udagawa
- Department of Oral Biochemistry, Matsumoto Dental University, Shiojiri, Japan
| | - Minqi Li
- Center of Osteoporosis and Bone Mineral Research, Department of Bone Metabolism, School of Stomatology, Shandong University, Jinan, China
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan.
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Morimoto Y, Hasegawa T, Hongo H, Yamamoto T, Maruoka H, Haraguchi-Kitakamae M, Nakanishi K, Yamamoto T, Ishizu H, Shimizu T, Yoshihara K, Yoshida Y, Sugaya T, Amizuka N. Phosphorylated pullulan promotes calcification during bone regeneration in the bone defects of rat tibiae. Front Bioeng Biotechnol 2023; 11:1243951. [PMID: 37885453 PMCID: PMC10598676 DOI: 10.3389/fbioe.2023.1243951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 09/27/2023] [Indexed: 10/28/2023] Open
Abstract
The current study aimed to evaluate bone tissue regeneration using a combination of β-tricalcium phosphate (βTCP) and phosphorylated pullulan (PPL, a phosphate-rich polysaccharide polymer consisting of maltotriose units). Round defects of 2 mm diameter were created in the arterial center of rat tibiae, which were further treated with vehicle (control group), βTCP (βTCP group), or βTCP + PPL (βTCP + PPL group) grafts. The control specimens without bone grafts exhibited rapid bone formation after 1 week; however, the regenerated bone was not resorbed until 4 weeks. In contrast, βTCP-grafted specimens exhibited fewer but thicker trabeculae, whereas the βTCP + PPL group displayed many fine trabeculae at 4 weeks. In the βTCP + PPL group, new bone was associated with the βTCP granules and PPL. Similarly, PHOSPHO1-positive osteoblasts were localized on the βTCP granules as well as the PPL. On the other hand, TRAP-reactive osteoclasts predominantly localized on newly-formed bone and βTCP granules rather than on the PPL. No significant differences were observed in the expression of Alp, Integrin αv, Osteopontin, Osteocalcin, and Dmp-1 in PPL-treated MC3T3-E1 osteoblastic cells, suggesting that PPL did not facilitate osteoblastic differentiation. However, von Kossa staining identified abundant needle-like calcified structures extending inside the PPL. Furthermore, transmission electron microscopy (TEM) revealed many globular structures identical to calcified nodules. In addition, calcified collagen fibrils were observed in the superficial layer of the PPL. Thus, PPL may serve as a scaffold for osteoblastic bone formation and promotes calcification on its surface. In conclusion, we speculated that βTCP and PPL might promote bone regeneration and could be integrated into promising osteoconductive materials.
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Affiliation(s)
- Yasuhito Morimoto
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
- Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomomaya Yamamoto
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
- Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces, Sapporo, Japan
| | - Haruhi Maruoka
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Mai Haraguchi-Kitakamae
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
- Division of Craniofacial Development and Tissue Biology, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Ko Nakanishi
- Biomaterials and Bioengineering, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tsuneyuki Yamamoto
- Oral Functional Anatomy, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hotaka Ishizu
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
- Orthopedics, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Tomohiro Shimizu
- Orthopedics, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Kumiko Yoshihara
- National Institute of Advanced Industrial Science and Technology (AIST), Health and Medical Research Institute, Takamatsu, Japan
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Yasuhiro Yoshida
- Biomaterials and Bioengineering, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tsutomu Sugaya
- Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
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Mae T, Hasegawa T, Hongo H, Yamamoto T, Zhao S, Li M, Yamazaki Y, Amizuka N. Immunolocalization of Enzymes/Membrane Transporters Related to Bone Mineralization in the Metaphyses of the Long Bones of Parathyroid-Hormone-Administered Mice. Medicina (Kaunas) 2023; 59:1179. [PMID: 37374382 DOI: 10.3390/medicina59061179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/15/2023] [Accepted: 06/16/2023] [Indexed: 06/29/2023]
Abstract
The present study aimed to demonstrate the immunolocalization and/or gene expressions of the enzymes and membrane transporters involved in bone mineralization after the intermittent administration of parathyroid hormone (PTH). The study especially focused on TNALP, ENPP1, and PHOSPHO1, which are involved in matrix vesicle-mediated mineralization, as well as PHEX and the SIBLING family, which regulate mineralization deep inside bone. Six-week-old male mice were subcutaneously injected with 20 μg/kg/day of human PTH (1-34) two times per day (n = 6) or four times per day (n = 6) for two weeks. Additionally, control mice (n = 6) received a vehicle. Consistently with an increase in the volume of the femoral trabeculae, the mineral appositional rate increased after PTH administration. The areas positive for PHOSPHO1, TNALP, and ENPP1 in the femoral metaphyses expanded, and the gene expressions assessed by real-time PCR were elevated in PTH-administered specimens when compared with the findings in control specimens. The immunoreactivity and/or gene expressions of PHEX and the SIBLING family (MEPE, osteopontin, and DMP1) significantly increased after PTH administration. For example, MEPE immunoreactivity was evident in some osteocytes in PTH-administered specimens but was hardly observed in control specimens. In contrast, mRNA encoding cathepsin B was significantly reduced. Therefore, the bone matrix deep inside might be further mineralized by PHEX/SIBLING family after PTH administration. In summary, it is likely that PTH accelerates mineralization to maintain a balance with elevated matrix synthesis, presumably by mediating TNALP/ENPP1 cooperation and stimulating PHEX/SIBLING family expression.
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Affiliation(s)
- Takahito Mae
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
- Department of Gerontology, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Tomomaya Yamamoto
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
- Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces, Sapporo 005-8543, Japan
| | - Shen Zhao
- Department of Endodontics and Operative Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Minqi Li
- Center of Osteoporosis and Bone Mineral Research, Department of Bone Metabolism, School of Stomatology, Shandong University, Jinan 250012, China
| | - Yutaka Yamazaki
- Department of Gerontology, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
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Miyamoto Y, Hasegawa T, Hongo H, Yamamoto T, Haraguchi-Kitakamae M, Abe M, Maruoka H, Ishizu H, Shimizu T, Sasano Y, Udagawa N, Li M, Amizuka N. Histochemical assessment of osteoclast-like giant cells in Rankl -/- mice. J Oral Biosci 2023; 65:175-185. [PMID: 37088151 DOI: 10.1016/j.job.2023.04.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/07/2023] [Accepted: 04/10/2023] [Indexed: 04/25/2023]
Abstract
OBJECTIVES We examined mice with gene deletion of Receptor activator of nuclear factor-κB (Rank) ligand (Rankl) to histologically clarify whether they contained progenitor cells committed to osteoclastic differentiation up to the stage requiring RANK/RANKL signaling. METHODS The tibiae and femora of ten-week-old male wild-type, c-fos-/-, and Rankl-/- mice were used for immunohistochemistry and transmission electron microscopy (TEM). RESULTS In Rankl-/- mice, we observed osteoclast-like giant cells, albeit in low numbers, with single or two nuclei, engulfing the mineralized extracellular matrix. TEM revealed that these giant cells contained large numbers of mitochondria, vesicles/vacuoles, and clear zone-like structures but no ruffled borders. They often engulfed fragmented bony/cartilaginous components of the extracellular matrix that had been degraded. Additionally, osteoclast-like giant cells exhibited immunoreactivity for vacuolar H+-ATPase, galectin-3, and siglec-15 but not for tartrate-resistant acid phosphatase, cathepsin K, or MMP-9, all of which are classical hallmarks of osteoclasts. Furthermore, osteoclast-like giant cells were ephrinB2-positive as they were near EphB4-positive osteoblasts that are also positive for alkaline phosphatase and Runx2 in Rankl-/- mice. Unlike Rankl-/- mice, c-fos-/- mice lacking osteoclast progenitors and mature osteoclasts had no ephrinB2-positive osteoclast-like cells or alkaline phosphatase-positive/Runx2-reactive osteoblasts. This suggests that similar to authentic osteoclasts, osteoclast-like giant cells might have the potential to activate osteoblasts in Rankl-/- mice. CONCLUSIONS It seems plausible that osteoclast-like giant cells may have acquired some osteoclastic traits and the ability to resorb mineralized matrices even when the absence of RANK/RANKL signaling halted the osteoclastic differentiation cascade.
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Affiliation(s)
- Yukina Miyamoto
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomomaya Yamamoto
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan; Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces, Sapporo, Japan
| | - Mai Haraguchi-Kitakamae
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan; Division of Craniofacial Development and Tissue Biology, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Haruhi Maruoka
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hotaka Ishizu
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan; Orthopedics, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Tomohiro Shimizu
- Orthopedics, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yasuyuki Sasano
- Division of Craniofacial Development and Tissue Biology, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Nobuyuki Udagawa
- Department of Biochemistry, Matsumoto Dental University, Shiojiri, Japan
| | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University, Jinan, China
| | - Norio Amizuka
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
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Muneyama T, Hasegawa T, Yamamoto T, Hongo H, Haraguchi-Kitakamae M, Abe M, Maruoka H, Ishizu H, Shimizu T, Sasano Y, Li M, Amizuka N. Histochemical assessment on osteoclasts in long bones of toll-like receptor 2 (TLR2) deficient mice. J Oral Biosci 2023; 65:163-174. [PMID: 37088152 DOI: 10.1016/j.job.2023.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/07/2023] [Accepted: 04/10/2023] [Indexed: 04/25/2023]
Abstract
OBJECTIVE Toll-like receptor 2 (TLR2), recognizes a wide variety of pathogen-associated molecular patterns such as lipopolysaccharides, peptidoglycans, and lipopeptides, and is generally believed to be present in monocytes, macrophages, dendritic cells, and vascular endothelial cells. However, no histological examination of osteoclasts, which differentiate from precursors common to macrophages/monocytes, has been performed in a non-infected state of TLR2 deficiency. The objective of this study was to examine the histological properties and function of osteoclasts in the long bones of 8-week-old male TLR2 deficient (TLR2-/-) mice to gain insight into TLR2 function in biological circumstances without microbial infection. METHODS Eight-week-old male wild-type and TLR2-/- mice were fixed with paraformaldehyde solution, and their tibiae and femora were used for micro-CT analysis, immunohistochemistry, transmission electron microscopy, and real-time PCR analysis. RESULTS TLR2-/- tibiae and femora exhibited increased bone volume of metaphyseal trabeculae and elevated numbers of TRAP-positive osteoclasts. However, the number of multinucleated TRAP-positive osteoclasts was reduced, whereas mononuclear TRAP-positive cells increased, despite the high expression levels of Dc-Stamp and Oc-Stamp. Although TRAP-positive multinucleated and mononuclear osteoclasts showed the immunoreactivity and elevated expression of RANK and siglec-15, they revealed weak cathepsin K-positivity and less incorporation of the mineralized bone matrix, and often missing ruffled borders. It seemed likely that, despite the increased numbers, TLR2-/- osteoclasts reduced cell fusion and bone resorption activity. CONCLUSION It seems likely that even without bacterial infection, TLR2 might participate in cell fusion and subsequent bone resorption of osteoclasts.
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Affiliation(s)
- Takafumi Muneyama
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.
| | - Tomomaya Yamamoto
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan; Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces, Sapporo, Japan
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Mai Haraguchi-Kitakamae
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan; Division of Craniofacial Development and Tissue Biology, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Haruhi Maruoka
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hotaka Ishizu
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan; Orthopedics, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Tomohiro Shimizu
- Orthopedics, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yasuyuki Sasano
- Division of Craniofacial Development and Tissue Biology, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University, Jinan, China
| | - Norio Amizuka
- Developmental Biology of Hard Tissue Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
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Hasegawa T, Tokunaga S, Yamamoto T, Sakai M, Hongo H, Kawata T, Amizuka N. Evocalcet Rescues Secondary Hyperparathyroidism-driven Cortical Porosity in CKD Male Rats. Endocrinology 2023; 164:7013989. [PMID: 36718587 PMCID: PMC9939342 DOI: 10.1210/endocr/bqad022] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 01/09/2023] [Accepted: 01/27/2023] [Indexed: 02/01/2023]
Abstract
To elucidate the effect of evocalcet, a new oral calcimimetic to bone of secondary hyperparathyroidism (SHPT) with chronic kidney disease (CKD), the rats were 5/6 nephrectomized and fed on a high-phosphate diet. The treated rats were then divided into vehicle groups and evocalcet administered groups. The rats in the vehicle groups exhibited increased levels of serum PTH and inorganic phosphate (Pi) levels, high bone turnover, and severe cortical porosity, mimicking SHPT (CKD-SHPT rats). The cortical bone of the CKD-SHPT rats showed broad demineralization around the osteocytes, suppression of Phex/small integrin-binding ligand N-linked glycoprotein-mediated mineralization in the periphery of the osteocytic lacunae, and increased levels of osteocytic cell death, all of which were considered as the first steps of cortical porosity. In contrast, evocalcet ameliorated the increased serum PTH levels, the enlarged osteocytic lacunae, and the cortical porosity of the CKD-SHPT rats. Osteocytes of CKD-SHPT rats strongly expressed PTH receptor and Pit1/Pit2, which sense extracellular Pi, indicating that PTH and Pi affected these osteocytes. Cell death of cultured osteocytes increased in a Pi concentration-dependent manner, and PTH administration rapidly elevated Pit1 expression and enhanced osteocytic death, indicating the possibility that the highly concentrated serum PTH and Pi cause severe perilacunar osteolysis and osteocytic cell death. It is likely therefore that evocalcet not only decreases serum PTH but also reduces the exacerbation combined with PTH and Pi to the demineralization of osteocytic lacunae and osteocytic cell death, thereby protecting cortical porosity in CKD-SHPT rats.
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Affiliation(s)
- Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University,Sapporo, Japan
| | - Shin Tokunaga
- Medical Affairs Department, Kyowa Kirin Co., Ltd.,Tokyo, Japan
- Biomedical Science Research Laboratories 1, Research Unit, R&D Division, Kyowa Kirin Co., Ltd.,Shizuoka, Japan
| | - Tomomaya Yamamoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University,Sapporo, Japan
| | - Mariko Sakai
- Biomedical Science Research Laboratories 1, Research Unit, R&D Division, Kyowa Kirin Co., Ltd.,Shizuoka, Japan
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University,Sapporo, Japan
| | - Takehisa Kawata
- Medical Affairs Department, Kyowa Kirin Co., Ltd.,Tokyo, Japan
| | - Norio Amizuka
- Correspondence: Norio Amizuka, DDS, PhD, Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan. E-mail:
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Moritani Y, Hasegawa T, Yamamoto T, Hongo H, Yimin, Abe M, Yoshino H, Nakanishi K, Maruoka H, Ishizu H, Shimizu T, Takahata M, Iwasaki N, Li M, Tei K, Ohiro Y, Amizuka N. Histochemical assessment of accelerated bone remodeling and reduced mineralization in Il-6 deficient mice. J Oral Biosci 2022; 64:410-421. [DOI: 10.1016/j.job.2022.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/05/2022] [Accepted: 10/06/2022] [Indexed: 11/05/2022]
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Hongo H, Yokoyama A, Yamada-Sekiguchi T, Yamamoto T, Yoshino H, Abe M, Haraguchi-Kitakamae M, Luiz de Freitas PH, Hasegawa T, Li M. Histochemical assessment on osteocytic osteolysis in lactating mice fed with a calcium-insufficient diet. J Oral Biosci 2022; 64:422-430. [PMID: 36152933 DOI: 10.1016/j.job.2022.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 09/13/2022] [Accepted: 09/08/2022] [Indexed: 11/26/2022]
Abstract
OBJECTIVES This study aimed to examine if feeding lactating mice a calcium-insufficient diet while simultaneously administering alendronate (ALN) could potentially induce osteocytic osteolysis. METHODS Lactating mice were fed calcium (Ca)-insufficient diets with or without ALN administration, and then their femurs were examined for TRAP and ALP, and observed by Kossa staining and transmission electron microscopy (TEM). Mice that had been fed a Ca-insufficient diet were then fed a 44Ca-containinig diet, and their tibial sections were examined by isotope microscopy. RESULTS Mice fed a Ca-insufficient diet had a reduced number of TRAP-positive osteoclasts after ALN administration. ALN-treated, lactating mice fed a Ca-insufficient diet had enlarged lacunae in their cortical bones, and TEM imaging demonstrated expanded regions between osteocytes and lacunar walls. In ALN-treated lactating mice fed a Ca-insufficient diet, huge areas of demineralized bone matrix occurred, centered around blood vessels in the cortical bone. Isotope microscopy showed 44Ca in the vicinity of the osteocytic lacunae, and in the broad, previously demineralized region around the blood vessels in the cortical bone of lactating mice fed a 44Ca-sufficient diet. CONCLUSIONS Bone demineralization likely takes place in the periphery of the osteocytic lacunae and in the broad regions around the blood vessels of lactating mice when they are exposed to severely reduced serum Ca through a Ca-insufficient diet coupled with ALN administration.
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Affiliation(s)
- Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Ayako Yokoyama
- Gerontology, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tamaki Yamada-Sekiguchi
- Oral and Maxillofacial Surgery, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomomaya Yamamoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan; Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces, Sapporo, Japan
| | - Hirona Yoshino
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Mai Haraguchi-Kitakamae
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan; Division of Craniofacial Development and Tissue Biology, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | | | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan.
| | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University, Jinan, China
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Hasegawa T, Hongo H, Yamamoto T, Abe M, Yoshino H, Haraguchi-Kitakamae M, Ishizu H, Shimizu T, Iwasaki N, Amizuka N. Matrix Vesicle-Mediated Mineralization and Osteocytic Regulation of Bone Mineralization. Int J Mol Sci 2022; 23:ijms23179941. [PMID: 36077336 PMCID: PMC9456179 DOI: 10.3390/ijms23179941] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/23/2022] [Accepted: 08/29/2022] [Indexed: 11/16/2022] Open
Abstract
Bone mineralization entails two mineralization phases: primary and secondary mineralization. Primary mineralization is achieved when matrix vesicles are secreted by osteoblasts, and thereafter, bone mineral density gradually increases during secondary mineralization. Nearby extracellular phosphate ions (PO43−) flow into the vesicles via membrane transporters and enzymes located on the vesicles’ membranes, while calcium ions (Ca2+), abundant in the tissue fluid, are also transported into the vesicles. The accumulation of Ca2+ and PO43− in the matrix vesicles induces crystal nucleation and growth. The calcium phosphate crystals grow radially within the vesicle, penetrate the vesicle’s membrane, and continue to grow outside the vesicle, ultimately forming mineralized nodules. The mineralized nodules then attach to collagen fibrils, mineralizing them from the contact sites (i.e., collagen mineralization). Afterward, the bone mineral density gradually increases during the secondary mineralization process. The mechanisms of this phenomenon remain unclear, but osteocytes may play a key role; it is assumed that osteocytes enable the transport of Ca2+ and PO43− through the canaliculi of the osteocyte network, as well as regulate the mineralization of the surrounding bone matrix via the Phex/SIBLINGs axis. Thus, bone mineralization is biologically regulated by osteoblasts and osteocytes.
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Affiliation(s)
- Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
- Correspondence: (T.H.); (N.A.); Tel.: +81-11-706-4226 (T.H.); +81-11-706-4223 (N.A.)
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Tomomaya Yamamoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
- Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces, Sapporo 005-8543, Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Hirona Yoshino
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Mai Haraguchi-Kitakamae
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
- Division of Craniofacial Development and Tissue Biology, Graduate School of Dentistry, Tohoku University, Sendai 980-8577, Japan
| | - Hotaka Ishizu
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
- Orthopedic Surgery, Faculty of Medicine, Hokkaido University, Sapporo 060-8638, Japan
| | - Tomohiro Shimizu
- Orthopedic Surgery, Faculty of Medicine, Hokkaido University, Sapporo 060-8638, Japan
| | - Norimasa Iwasaki
- Orthopedic Surgery, Faculty of Medicine, Hokkaido University, Sapporo 060-8638, Japan
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
- Correspondence: (T.H.); (N.A.); Tel.: +81-11-706-4226 (T.H.); +81-11-706-4223 (N.A.)
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Maruoka H, Yamamoto T, Zhao S, Hongo H, Abe M, Ishizu H, Yoshino H, Luiz de Freitas PH, Li M, Hasegawa T. Histological functions of parathyroid hormone on bone formation and bone blood vessels. J Oral Biosci 2022; 64:279-286. [PMID: 35977651 DOI: 10.1016/j.job.2022.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 08/05/2022] [Accepted: 07/26/2022] [Indexed: 10/15/2022]
Abstract
BACKGROUND The intermittent administration of parathyroid hormone (PTH) has been prescribed to osteoporotic patients due to its bone anabolic effects. In addition to its actions on bone cells, PTH appears to affect bone-specific blood vessels. These blood vessels are derived from bone marrow sinusoids, which express EphB4, a hallmark of veinous vascular endothelial cells. Given the presence of osteo-vascular interactions, it is important to elucidate the effects of PTH on bone cells and blood vessels in murine models. HIGHLIGHTS PTH stimulates preosteoblastic proliferation and osteoblastic bone formation. The former appears to be directly affected by PTH, whereas the latter requires osteoclast-mediated coupling. The administration of PTH through high-frequency dosage schemes accelerates bone turnover featuring remodeling-based bone formation, whereas low-frequency schemes cause mainly remodeling-based and partly modeling-based bone formation. Normally, many blood vessels lack alpha smooth muscle actin (αSMA)-immunoreactive vascular muscle cells surrounding basement membranes, indicating them being capillaries. However, PTH administration increases the number of blood vessels surrounded by αSMA-positive cells. These αSMA-positive cells spread out of blood vessels and express alkaline phosphatase and c-kit, suggesting their potential to differentiate into osteogenic and vascular endothelial/perivascular cells. Unlike bone cells, αSMA-positive cells did not appear in the periphery of blood vessels in the kidney and liver, and the thickness of the tunica media did not change regardless of PTH administration. CONCLUSION Based on the results of the study and presence of osseous-vascular interactions, PTH appears to influence not only osteoblastic cells, but also blood vessels in bone.
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Affiliation(s)
- Haruhi Maruoka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine
| | - Tomomaya Yamamoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine; Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces, Sapporo, Japan
| | - Shen Zhao
- Department of Endodontics & Conservative Dentistry, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine
| | - Miki Abe
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine
| | - Hotaka Ishizu
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine; Orthopedic Surgery, Graduate School of Medicine, And Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Hirona Yoshino
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine
| | | | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University, Jinan, China
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, And Faculty of Dental Medicine.
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Maruoka H, Hasegawa T, Yoshino H, Abe M, Haraguchi-Kitakamae M, Yamamoto T, Hongo H, Nakanishi K, Nasoori A, Nakajima Y, Omaki M, Sato Y, Luiz de Fraitas PH, Li M. Immunolocalization of endomucin-reactive blood vessels and α-smooth muscle actin-positive cells in murine nasal conchae. J Oral Biosci 2022; 64:337-345. [PMID: 35589073 DOI: 10.1016/j.job.2022.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 05/08/2022] [Accepted: 05/09/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Recently, the biological functions of endomucin-positive blood vessels and closely associated αSMA-positive cells in long bones have been highlighted. The surrounding tissues of the flat bones, such as nasal bones covered with mucosa and lamina propria, are different from those of the long bones, indicating the different distributions of endomucin-positive blood vessels and αSMA-reactive cells in nasal bones. This study demonstrates the immunolocalization of endomucin-reactive blood vessels and αSMA-positive cells in the nasal conchae of 3- and 7-week-old mice. METHODS The nasal conchae of 3-week-old and 7-week-old male C57BL/6J mice were used for immunoreaction of endomucin, CD34, PDGFbb, TRAP, and c-kit. RESULTS While we identified abundant endomucin-reactive blood vessels in the lamina propria neighboring the bone, not all were positive for endomucin. More CD34-reactive cells and small blood vessels were observed in the nasal conchae of 3-week-old mice than in those of 7-week-old mice. Some αSMA-positive cells in the nasal conchae surrounded the blood vessels, indicating vascular smooth muscle cells, while other αSMA-immunopositive fibroblastic cells were detected throughout the lamina propria. αSMA-positive cells did not co-localize with C-kit-immunoreactivity, thereby indicating that the αSMA-positive cells may be myofibroblasts rather than undifferentiated mesenchymal cells. CONCLUSIONS Unlike long bones, nasal conchae contain endomucin-positive as well as endomucin-negative blood vessels and exhibit numerous αSMA-positive fibroblastic cells throughout the lamina propria neighboring the bone. Apparently, the distribution patterns of endomucin-positive blood vessels and αSMA-positive cells in nasal conchae are different from those in long bones.
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Affiliation(s)
| | | | | | - Miki Abe
- Developmental Biology of Hard Tissue
| | - Mai Haraguchi-Kitakamae
- Developmental Biology of Hard Tissue; Division of Craniofacial Development and Tissue Biology, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Tomomaya Yamamoto
- Developmental Biology of Hard Tissue; Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces, Sapporo, Japan
| | | | | | | | | | | | - Yoshiaki Sato
- Orthodontics, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | | | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University, Jinan, China
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Maruoka H, Zhao S, Yoshino H, Abe M, Yamamoto T, Hongo H, Haraguchi-Kitakamae M, Nasoori A, Ishizu H, Nakajima Y, Omaki M, Shimizu T, Iwasaki N, Luiz de Freitas PH, Li M, Hasegawa T. Histochemical examination of blood vessels in murine femora with intermittent PTH administration. J Oral Biosci 2022; 64:329-336. [DOI: 10.1016/j.job.2022.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/06/2022] [Accepted: 05/09/2022] [Indexed: 10/18/2022]
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Yamamoto T, Hasegawa T, Fraitas PHLD, Hongo H, Zhao S, Yamamoto T, Nasoori A, Abe M, Maruoka H, Kubota K, Morimoto Y, Haraguchi M, Shimizu T, Takahata M, Iwasaki N, Li M, Amizuka N. Histochemical characteristics on minimodeling-based bone formation induced by anabolic drugs for osteoporotic treatment. Biomed Res 2021; 42:161-171. [PMID: 34544992 DOI: 10.2220/biomedres.42.161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Modeling, the changes of bone size and shape, often takes place at the developmental stages, whereas bone remodeling-replacing old bone with new bone-predominantly occurs in adults. Unlike bone remodeling, bone formation induced by modeling i.e., minimodeling (microscopic modeling in cancellous bone) is independent of osteoclastic bone resorption. Although recently-developed drugs for osteoporotic treatment could induce minimodeling-based bone formation in addition to remodeling-based bone formation, few reports have demonstrated the histological aspects of minimodeling-based bone formation. After administration of eldecalcitol or romosozumab, unlike teriparatide treatment, mature osteoblasts formed new bone by minimodeling, without developing thick preosteoblastic layers. The histological characteristics of minimodeling-based bone formation is quite different from remodeling, as it is not related to osteoclastic bone resorption, resulting in convex-shaped new bone and smooth cement lines called arrest lines. In this review, we will show histological properties of minimodeling-based bone formation by osteoporotic drugs.
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Affiliation(s)
- Tomomaya Yamamoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University.,Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
| | | | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
| | - Shen Zhao
- National Clinical Research Center of Stomatology, Department of Endodontics, School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Ninth People's Hospital, Shanghai Jiaotong University
| | - Tsuneyuki Yamamoto
- Oral Functional Anatomy, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
| | - Alireza Nasoori
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
| | - Miki Abe
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
| | - Haruhi Maruoka
- Orthodontics, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
| | - Keisuke Kubota
- Oral Functional Prosthodontics, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
| | - Yasuhito Morimoto
- Periodontology and Endodontology, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
| | - Mai Haraguchi
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
| | - Tomohiro Shimizu
- Department of Orthopedic Surgery, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
| | - Masahiko Takahata
- Department of Orthopedic Surgery, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
| | - Norimasa Iwasaki
- Department of Orthopedic Surgery, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
| | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, and Faculty of Dental Medicine, Hokkaido University
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Yokoyama A, Hasegawa T, Hiraga T, Yamada T, Hongo H, Yamamoto T, Abe M, Yoshida T, Imanishi Y, Kuroshima S, Sasaki M, de Fraitas PHL, Li M, Amizuka N, Yamazaki Y. Altered immunolocalization of FGF23 in murine femora metastasized with human breast carcinoma MDA-MB-231 cells. J Bone Miner Metab 2021; 39:810-823. [PMID: 33834310 DOI: 10.1007/s00774-021-01220-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Accepted: 02/28/2021] [Indexed: 11/27/2022]
Abstract
INTRODUCTION After the onset of bone metastasis, tumor cells appear to modify surrounding microenvironments for their benefit, and particularly, the levels of circulating fibroblast growth factor (FGF) 23 in patients with tumors have been highlighted. MATERIALS AND METHODS We have attempted to verify if human breast carcinoma MDA-MB-231 cells metastasized in the long bone of nu/nu mice would synthesize FGF23. Serum concentrations of calcium, phosphate (Pi) and FGF23 were measured in control nu/nu mice, bone-metastasized mice, and mice with mammary gland injected with MDA-MB-231 cells mimicking primary mammary tumors. RESULTS AND CONCLUSIONS MDA-MB-231 cells revealed intense FGF23 reactivity in metastasized lesions, whereas MDA-MB-231 cells cultured in vitro or when injected into the mammary glands (without bone metastasis) showed weak FGF23 immunoreactivity. Although the bone-metastasized MDA-MB-231 cells abundantly synthesized FGF23, osteocytes adjacent to the FGF23-immunopositive tumors, unlike intact osteocytes, showed no FGF23. Despite significantly elevated serum FGF23 levels in bone-metastasized mice, there was no significant decrease in the serum Pi concentration when compared with the intact mice and mice with a mass of MDA-MB-231 cells in mammary glands. The metastasized femora showed increased expression and FGFR1 immunoreactivity in fibroblastic stromal cells, whereas femora of control mice showed no obvious FGFR1 immunoreactivity. Taken together, it seems likely that MDA-MB-231 cells synthesize FGF23 when metastasized to a bone, and thus affect FGFR1-positive stromal cells in the metastasized tumor nest in a paracrine manner.
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Affiliation(s)
- Ayako Yokoyama
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Kita-13, Nishi-7, Kita-Ku, Sapporo, Japan
- Gerodontology, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Kita-13, Nishi-7, Kita-Ku, Sapporo, Japan.
| | - Toru Hiraga
- Department of Oral Anatomy, Matsumoto Dental University, Shiojiri, Japan
| | - Tamaki Yamada
- Oral and Maxillofacial Surgery, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Kita-13, Nishi-7, Kita-Ku, Sapporo, Japan
| | - Tomomaya Yamamoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Kita-13, Nishi-7, Kita-Ku, Sapporo, Japan
- Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces,, Sapporo, Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Kita-13, Nishi-7, Kita-Ku, Sapporo, Japan
| | - Taiji Yoshida
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Kita-13, Nishi-7, Kita-Ku, Sapporo, Japan
| | - Yasuo Imanishi
- Department of Nephrology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - Shinichiro Kuroshima
- Department of Applied Prosthodontics, Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Muneteru Sasaki
- Department of Applied Prosthodontics, Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | | | - Minqi Li
- Division of Basic Science of Stomatology, The School of Stomatology, Shandong University, Jinan, China
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Kita-13, Nishi-7, Kita-Ku, Sapporo, Japan
| | - Yutaka Yamazaki
- Gerodontology, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
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Yamamoto T, Hasegawa T, Hongo H, Amizuka N. Three-dimensional reconstruction of the Golgi apparatus in osteoclasts by a combination of NADPase cytochemistry and serial section scanning electron microscopy. Histochem Cell Biol 2021; 156:503-508. [PMID: 34436644 DOI: 10.1007/s00418-021-02024-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/17/2021] [Indexed: 11/28/2022]
Abstract
The three-dimensional morphology of the Golgi apparatus in osteoclasts was investigated by computer-aided reconstruction. Rat femora were treated for nicotinamide adenine dinucleotide phosphatase (NADPase) cytochemistry, and light microscopy was used to select several osteoclasts in serial semi-thin sections to investigate the Golgi apparatus by backscattered electron-mode scanning electron microscopy. Lace-like structures with strong backscattered electron signals were observed around the nuclei. These structures, observed within the Golgi apparatus, were attributed to the reaction products (i.e., lead precipitates) of NADPase cytochemistry. Features on the images corresponding to the Golgi apparatus, nuclei, and ruffled border were manually traced and three-dimensionally reconstructed using ImageJ/Fiji (an open-source image processing package). In the reconstructed model, the Golgi apparatus formed an almost-continuous structure with a basket-like configuration, which surrounded all the nuclei and also partitioned them. This peculiar three-dimensional morphology of the Golgi apparatus was discovered for the first time in this study. On the basis of the location of the cis- and trans-sides of the Golgi apparatus and the reported results of previous studies, we postulated that the nuclear membrane synthesized specific proteins in the osteoclasts and, accordingly, the Golgi apparatus accumulated around the nuclei as a receptacle.
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Affiliation(s)
- Tsuneyuki Yamamoto
- Department of Oral Functional Anatomy, Hokkaido University Graduate School of Dental Medicine, Kita 13 Nishi 7, Kita-ku, Sapporo, 060-8586, Japan.
| | - Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine, Kita 13 Nishi 7, Kita-ku, Sapporo, 060-8586, Japan
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine, Kita 13 Nishi 7, Kita-ku, Sapporo, 060-8586, Japan
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine, Kita 13 Nishi 7, Kita-ku, Sapporo, 060-8586, Japan
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18
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Yamamoto T, Hasegawa T, Mae T, Hongo H, Yamamoto T, Abe M, Nasoori A, Morimoto Y, Maruoka H, Kubota K, Haraguchi M, Li M. Comparative immunolocalization of tissue nonspecific alkaline phosphatase and ectonucleotide pyrophosphatase/phosphodiesterase 1 in murine bone. J Oral Biosci 2021; 63:259-264. [PMID: 34391947 DOI: 10.1016/j.job.2021.08.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE This study aimed to demonstrate the immunolocalization and gene expression of tissue nonspecific alkaline phosphatase (TNALP) and ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) in osteoblasts, preosteoblasts, and osteocytes of murine bone to provide clues for a better understanding of the supply of phosphate ions (Pi) during bone mineralization. METHODS Six-week-old male C57BL/6J mice (n = 6) were fixed with a paraformaldehyde solution, and the right femora were extracted for immunodetection of TNALP and ENPP1, while the left tibiae were used for reverse transcription polymerase chain reaction to evaluate Tnalp and Enpp1 gene expression. RESULTS TNALP was intensely localized on the basolateral cell membranes of mature osteoblasts and preosteoblastic cells. There was little immunoreactivity of TNALP on the secretory surface of the osteoblasts and no TNALP reactivity in the osteocytes. In contrast, ENPP1 was observed throughout the cytoplasm of mature osteoblasts and osteocytes embedded in bone but was not observed in preosteoblasts. Together, despite the fact that the osteoid is a site of matrix vesicle-mediated mineralization, ENPP1, which inhibits mineralization by providing pyrophosphates, was localized in close proximity of the osteoid, whereas TNALP, which facilitates mineralization by providing Pi, was relatively distant from the osteoid. CONCLUSION It seems likely that the differential localization of TNALP and ENPP1 around the osteoid observed at the microscopic level may provide preferential micro-circumstance for a balanced concentration of Pi and pyrophosphate for bone mineralization.
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Affiliation(s)
- Tomomaya Yamamoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan; Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces, Sapporo, Japan
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan.
| | - Takahito Mae
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan; Gerontology, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tsuneyuki Yamamoto
- Oral Functional Anatomy, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Alireza Nasoori
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Yasuhito Morimoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan; Periodontology and Endodontology, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Haruhi Maruoka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan; Orthodontics, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Keisuke Kubota
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan; Oral Functional Prosthodontics, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Mai Haraguchi
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University, Jinan, China
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19
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Hashimoto K, Hasegawa T, Yamamoto T, Hongo H, Imin Y, Abe M, Nasoori A, Nakanishi K, Maruoka H, Morimoto Y, Kubota K, Shimizu T, Haraguchi M, Takahata M, Iwasaki N, Li M, Fujisawa T, Amizuka N. Histological observation on the initial stage of vascular invasion into the secondary ossification of murine femoral epiphyseal cartilage. Biomed Res 2021; 42:139-151. [PMID: 34380922 DOI: 10.2220/biomedres.42.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
It remains unknown whether the histology of vascular invasion during secondary ossification of epiphyseal cartilage is the same as that seen in primary ossification; we examined the initial processes of vascular invasion of secondary ossification in the murine femora. Many endomucin-immunoreactive blood vessels gathered at the central region of the articular surface, and buds of soft tissue, including glomerular loops of endomucin-immunoreactive blood vessels and TNALPase- immunopositive osteoblastic cells accompanied by TRAP-positive osteoclasts, had begun to invade the epiphyseal cartilage. The invading soft tissues formed cartilage canals displaying MMP9 immunoreactivity in the tip region, and cartilaginous collagen fibrils were not visible in the vicinity of the vascular wall of the blood vessels. Thus, the histological profile marked by invading glomerular vasculature and the erosion of the cartilage matrix near the vascular walls during secondary ossification differs from that seen during primary ossification.
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Affiliation(s)
- Keiji Hashimoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University.,Dental Anesthesiology, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | - Tomomaya Yamamoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University.,Northern Army Medical Unit, Camp Makomanai, Japan Ground Self-Defense Forces
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | - Y Imin
- Central Research Institute, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Miki Abe
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | - Alireza Nasoori
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | - Ko Nakanishi
- Biomaterials and Bioengineering, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University.,Orthodontics, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | - Haruhi Maruoka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University.,Orthodontics, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | - Yasuhito Morimoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University.,Periodontology and Endodontology, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | - Keisuke Kubota
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University.,Oral Functional Prosthodontics, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | - Tomohiro Shimizu
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Mai Haraguchi
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | - Masahiko Takahata
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Norimasa Iwasaki
- Department of Orthopaedic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University
| | - Toshiaki Fujisawa
- Dental Anesthesiology, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University
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20
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Tsuchiya E, Hasegawa T, Hongo H, Yamamoto T, Abe M, Yoshida T, Zhao S, Tsuboi K, Udagawa N, Henrique Luiz de Freitas P, Li M, Kitagawa Y, Amizuka N. Histochemical assessment on the cellular interplay of vascular endothelial cells and septoclasts during endochondral ossification in mice. Microscopy (Oxf) 2021; 70:201-214. [PMID: 32816022 DOI: 10.1093/jmicro/dfaa047] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 08/02/2020] [Accepted: 08/07/2020] [Indexed: 11/12/2022] Open
Abstract
This study was aimed to verify the cellular interplay between vascular endothelial cells and surrounding cells in the chondro-osseous junction of murine tibiae. Many CD31-positive endothelial cells accompanied with Dolichos Biflorus Agglutinin lectin-positive septoclasts invaded into the hypertrophic zone of the tibial epiphyseal cartilage. MMP9 immunoreactive cytoplasmic processes of vascular endothelial cells extended into the transverse partitions of cartilage columns. In contrast, septoclasts included several large lysosomes which indicate the incorporation of extracellular matrices despite no immunopositivity for F4/80-a hallmark of macrophage/monocyte lineage. In addition, septoclasts were observed in c-fos-/- mice but not in Rankl-/- mice. Unlike c-fos-/- mice, Rankl-/- mice showed markedly expanded hypertrophic zone and the irregular shape of the chondro-osseous junction. Immunoreactivity of platelet-derived growth factor-bb, which involved in angiogenic roles in the bone, was detected in not only osteoclasts but also septoclasts at the chondro-osseous junction. Therefore, septoclasts appear to assist the synchronous vascular invasion of endothelial cells at the chondro-osseous junction. Vascular endothelial cells adjacent to the chondro-osseous junction possess endomucin but not EphB4, whereas those slightly distant from the chondro-osseous junction were intensely positive for both endomucin and EphB4, while being accompanied with ephrinB2-positive osteoblasts. Taken together, it is likely that vascular endothelial cells adjacent to the chondro-osseous junction would interplay with septoclasts for synchronous invasion into the epiphyseal cartilage, while those slightly distant from the chondro-osseous junction would cooperate with osteoblastic activities presumably by mediating EphB4/ephrinB2. MINI-ABSTRACT Our original article demonstrated that vascular endothelial cells adjacent to the chondro-osseous junction would interplay with septoclasts for synchronous invasion into the epiphyseal cartilage, while those slightly distant from the chondro-osseous junction would cooperate with osteoblastic activities presumably by mediating EphB4/ephrinB2. (A figure that best represents your paper is Fig. 5c).
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Affiliation(s)
- Erika Tsuchiya
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan.,Oral Diagnosis and Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Tomomaya Yamamoto
- Department of Dentistry, Japan Ground Self-Defense Force Camp Asaka, Tokyo, Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Taiji Yoshida
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Shen Zhao
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Kanako Tsuboi
- Dental Surgery, Haibara General Hospital, Makinohara, Shizuoka, Japan
| | - Nobuyuki Udagawa
- Department of Oral Biochemistry, Matsumoto Dental University, Shiojiri, Nagano, Japan
| | | | - Minqi Li
- Division of Basic Science of Stomatology, The School of Stomatology, Shandong University, Jinan, Shandong, China
| | - Yoshimasa Kitagawa
- Oral Diagnosis and Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan
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21
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Zhao S, Hasegawa T, Hongo H, Yamamoto T, Abe M, Yoshida T, Haraguchi M, de Freitas PHL, Li M, Tei K, Amizuka N. Intermittent PTH Administration Increases Bone-Specific Blood Vessels and Surrounding Stromal Cells in Murine Long Bones. Calcif Tissue Int 2021; 108:391-406. [PMID: 33170307 DOI: 10.1007/s00223-020-00776-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 10/29/2020] [Indexed: 12/28/2022]
Abstract
To verify whether PTH acts on bone-specific blood vessels and on cells surrounding these blood vessels, 6-week-old male mice were subjected to vehicle (control group) or hPTH [1-34] (20 µg/kg/day, PTH group) injections for 2 weeks. Femoral metaphyses were used for histochemical and immunohistochemical studies. In control metaphyses, endomucin-positive blood vessels were abundant, but αSMA-reactive blood vessels were scarce. In the PTH-administered mice, the lumen of endomucin-positive blood vessels was markedly enlarged. Moreover, many αSMA-positive cells were evident near the blood vessels, and seemed to derive from those vessels. These αSMA-positive cells neighboring the blood vessels showed features of mesenchymal stromal cells, such as immunopositivity for c-kit and tissue nonspecific alkaline phosphatase (TNALP). Thus, PTH administration increased the population of perivascular/stromal cells positive for αSMA and c-kit, which were likely committed to the osteoblastic lineage. To understand the cellular events that led to increased numbers and size of bone-specific blood vessels, we performed immunohistochemical studies for PTH/PTHrP receptor and VEGF. After PTH administration, PTH/PTHrP receptor, VEGF and its receptor flk-1 were consistently identified in both osteoblasts and blood vessels (endothelial cells and surrounding perivascular cells). Our findings suggest that exogenous PTH increases the number and size of bone-specific blood vessels while fostering perivascular/stromal cells positive for αSMA/TNALP/c-kit.
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Affiliation(s)
- Shen Zhao
- National Clinical Research Center of Stomatology, Department of Endodontics, School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Ninth People's Hospital, Shanghai Jiaotong University, Shanghai, China
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan
- Oral and Maxillofacial Surgery, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan.
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan
| | - Tomomaya Yamamoto
- Section of Dentistry, Camp Asaka, Japan Ground Self-Defense Forces, Tokyo, Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan
| | - Taiji Yoshida
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan
| | - Mai Haraguchi
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan
| | | | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University, Jinan, China
| | - Kanchu Tei
- Oral and Maxillofacial Surgery, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan
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22
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Nagai T, Hasegawa T, Yimin, Yamamoto T, Hongo H, Abe M, Yoshida T, Yokoyama A, de Freitas PHL, Li M, Yokoyama A, Amizuka N. Immunocytochemical assessment of cell differentiation of podoplanin-positive osteoblasts into osteocytes in murine bone. Histochem Cell Biol 2020; 155:369-380. [PMID: 33175185 DOI: 10.1007/s00418-020-01937-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2020] [Indexed: 01/02/2023]
Abstract
In this study, we examined the immunolocalization of podoplanin/E11, CD44, actin filaments, and phosphorylated ezrin in the osteoblasts on the verge of differentiating into osteocytes in murine femora and tibiae. When observing under stimulated emission depletion microscopy, unlike podoplanin-negative osteoblasts, podoplanin-positive osteoblasts showed a rearranged assembly of actin filaments along the cell membranes which resembled that of embedded osteocytes. In the metaphysis, i.e., the bone remodeling site, CD44-bearing osteoclasts were either proximal to or in contact with podoplanin-positive osteoblasts, but the podoplanin-positive osteoblasts also localized CD44 on their own cell surface. These podoplanin-positive osteoblasts, which either possessed CD44 on their cell surface or were close to CD44-bearing osteoclasts, showed phosphorylated ezrin-positivity on the cell membranes. Therefore, the CD44/podoplanin interaction on the cell surface may be involved in the osteoblastic differentiation into osteocytes in the metaphyses, via the mediation of podoplanin-driven ezrin phosphorylation and the subsequent reorganized assembly of actin filaments. Consistently, the protein expression of phosphorylated ezrin was increased after CD44 administration in calvarial culture. Conversely, in modeling sites such as the cortical bones, podoplanin-positive osteoblasts were uniformly localized at certain intervals even without contact with CD44-positive bone marrow cells; furthermore, they also exhibited phosphorylated ezrin immunoreactivity along their cell membranes. Taken together, it seems likely that the CD44/podoplanin interaction is involved in osteoblastic differentiation into osteocytes in the bone remodeling area but not in modeling sites.
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Affiliation(s)
- Tomoya Nagai
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan.,Oral Functional Prosthodontics, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan.
| | - Yimin
- Central Research Institute, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Tomomaya Yamamoto
- Department of Dentistry, Camp Asaka, Japan Ground Self-Defense Force, Tokyo, Japan
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Taiji Yoshida
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Ayako Yokoyama
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan.,Gerodontology, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | | | - Minqi Li
- Division of Basic Science of Stomatology, The School of Stomatology, Shandong University, Jinan, China
| | - Atsuro Yokoyama
- Oral Functional Prosthodontics, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-Ku, Sapporo, Hokkaido, 060-8586, Japan
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23
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Sato A, Omura M, Minagawa Y, Takino K, Matsui K, Hongo H, Shirata R, Hashimoto H, Misumi T, Sasaki Y, Inoue T, Hata M. PO-1258: Intensity modulated radiation therapy for lymph node oligo-recurrence. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)01276-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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24
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Hongo H, Hasegawa T, Saito M, Tsuboi K, Yamamoto T, Sasaki M, Abe M, Henrique Luiz de Freitas P, Yurimoto H, Udagawa N, Li M, Amizuka N. Osteocytic Osteolysis in PTH-treated Wild-type and Rankl-/- Mice Examined by Transmission Electron Microscopy, Atomic Force Microscopy, and Isotope Microscopy. J Histochem Cytochem 2020; 68:651-668. [PMID: 32942927 DOI: 10.1369/0022155420961375] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
To demonstrate the ultrastructure of osteocytic osteolysis and clarify whether osteocytic osteolysis occurs independently of osteoclastic activities, we examined osteocytes and their lacunae in the femora and tibiae of 11-week-old male wild-type and Rankl-/- mice after injection of human parathyroid hormone (PTH) [1-34] (80 µg/kg/dose). Serum calcium concentration rose temporarily 1 hr after PTH administration in wild-type and Rankl-/- mice, when renal arteries and veins were ligated. After 6 hr, enlargement of osteocytic lacunae was evident in the cortical bones of wild-type and Rankl-/- mice, but not so in their metaphyses. Von Kossa staining and transmission electron microscopy showed broadly demineralized bone matrix peripheral to enlarged osteocytic lacunae, which contained fragmented collagen fibrils and islets of mineralized matrices. Nano-indentation by atomic force microscopy revealed the reduced elastic modulus of the PTH-treated osteocytic perilacunar matrix, despite the microscopic verification of mineralized matrix in that region. In addition, 44Ca deposition was detected by isotope microscopy and calcein labeling in the eroded osteocytic lacunae of wild-type and Rankl-/- mice. Taken together, our findings suggest that osteocytes can erode the bone matrix around them and deposit minerals on their lacunar walls independently of osteoclastic activity, at least in the murine cortical bone. (J Histochem Cytochem 68: -XXX, 2020).
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Affiliation(s)
- Hiromi Hongo
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Masami Saito
- Bruker Japan K.K., Nano Surfaces & Metrology Division, Tokyo, Japan
| | - Kanako Tsuboi
- Dental Surgery, Haibara General Hospital, Makinohara, Japan
| | - Tomomaya Yamamoto
- Department of Dentistry, Japan Ground Self Defense Force Camp Asaka, Tokyo, Japan
| | - Muneteru Sasaki
- Department of Applied Prosthodontics, Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | | | - Hisayoshi Yurimoto
- Isotope Imaging Laboratory, Creative Research Institution, Hokkaido University, Sapporo, Japan
| | - Nobuyuki Udagawa
- Department of Biochemistry, Matsumoto Dental University, Shiojiri, Japan
| | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, School of Stomatology, Shandong University, Jinan, China
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Faculty of Dental Medicine, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
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25
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Yanai Y, Kosaka T, Hongo H, Yasumizu Y, Tanaka N, Takeda T, Matsumoto K, Morita S, Mizuno R, Oya M. Locally advanced prostate cancer effected by the tumor immunoenvironment. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)32988-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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26
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Kosaka T, Hongo H, Ueda K, Oya M. In silico screening for identification of novel drugs for reprogramming of lineage plasticity in neuroendocrine prostate cancer. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33840-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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27
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Hasegawa T, Miyamoto-Takasaki Y, Abe M, Qiu Z, Yamamoto T, Yoshida T, Yoshino H, Hongo H, Yokoyama A, Sasaki M, Kuroshima S, Hara K, Kobayashi M, Akiyama Y, Maeda T, Luiz de Freitas PH, Li M, Amizuka N. Histochemical examination on principal collagen fibers in periodontal ligaments of ascorbic acid-deficient ODS-od/od rats. Microscopy (Oxf) 2019; 68:349-358. [PMID: 31271212 DOI: 10.1093/jmicro/dfz021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 04/24/2019] [Indexed: 12/13/2022] Open
Abstract
In this study, we aimed to clarify the role of ascorbic acid in collagen synthesis in periodontal ligaments using osteogenic disorder Shionogi (ODS)/ShiJcl-od/od rats lacking L-gulonolactone oxidase. These rats cannot synthesize ascorbic acid in vivo. Eight-week-old ODS/ShiJcl-od/od male rats were administered ascorbic acid solution at a concentration of 200 mg/dL (control group, n = 6) or ascorbic acid solution at concentration of 0.3 mg/dL (insufficient group, n = 12). Six rats of the insufficient group were then given with ascorbic acid solution at concentration of 200 mg/dL for additional 3 weeks (rescued group, n = 6), and then, their mandibles were histochemically examined. Consequently, the insufficient group specimens were seen to possess fewer collagen fibers, and silver impregnation revealed numerous fine, reticular fiber-like fibrils branching off from collagen in the periodontal ligaments. In control group, faint immunoreactivities for matrix metalloproteinase (MMP)2 and cathepsin H were seen in the periphery of blood vessels and throughout the ligament, respectively. In contrast, in the insufficient group, intense MMP2-immunoreactivity was observed to be associated with collagen fibrils in the periodontal ligaments, and cathepsin H-immunopositivity was seen in ligamentous cells. The rescued group showed abundant collagen fibers filling the periodontal ligament space. Under transmission electron microscopy, ligamentous fibroblasts incorporated collagen fibrils into tubular endosomes/lysosomes while simultaneously synthesizing collagen fibril bundles. Thus, ascorbic acid insufficiency affected the immunolocalization of cathepsin H and MMP2; however, ligamentous fibroblasts appear to possess the potential to synthesize collagen fibers when supplied with ascorbic acid.
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Affiliation(s)
- Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Yukina Miyamoto-Takasaki
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Zixuan Qiu
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Tomomaya Yamamoto
- Section of Dentistry, Japan Ground Self-Defense Forces Camp Asaka, Tokyo, Japan
| | - Taiji Yoshida
- School of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Hirona Yoshino
- School of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Ayako Yokoyama
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan.,Gerodontology, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Muneteru Sasaki
- Department of Applied Prosthodontics, Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Shinichiro Kuroshima
- Department of Applied Prosthodontics, Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Kuniko Hara
- Pharmacological Evaluation Section, Eisai, Co. Ltd, Tokyo, Japan
| | | | - Yasuhiro Akiyama
- Pharmacological Evaluation Section, Eisai, Co. Ltd, Tokyo, Japan
| | - Takeyasu Maeda
- Center for Advanced Oral Science, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Faculty of Dental Medicine, University of Airlangga, Surabaya, Indonesia
| | | | - Minqi Li
- Division of Basic Science of Stomatology, The School of Stomatology, Shandong University, Jinan, China
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
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28
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Yamamoto T, Hasegawa T, Hongo H, Amizuka N. Three-dimensional morphology of the Golgi apparatus in osteoclasts: NADPase and arylsulfatase cytochemistry, and scanning electron microscopy using osmium maceration. Microscopy (Oxf) 2019; 68:243-253. [PMID: 30860257 DOI: 10.1093/jmicro/dfz003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 12/24/2018] [Accepted: 01/15/2019] [Indexed: 11/12/2022] Open
Abstract
This study was designed to observe osteoclasts in the rat femora by light and electron microscopic cytochemistry for nicotinamide adenine dinucleotide phosphatase (NADPase) and arylsulfatase, and scanning electron microscopy using osmium maceration to assess the three-dimensional morphology of the Golgi apparatus in osteoclasts. The Golgi apparatus showed strong NADPase activity and surrounded each nucleus with the cis-side facing the nucleus. The Golgi apparatus could be often traced for a length of 20 μm or longer. Observations of serial semi-thin sections confirmed that a single line of reaction products (=lead precipitates) intervened somewhere between any two neighboring nuclei. The nuclear membrane showed strong arylsulfatase activity as well as rough endoplasmic reticulum and lysosomes. Scanning electron microscopy showed that the Golgi apparatus covered the nucleus in a porous sheet-like configuration. Under magnification, the cis-most saccule showed a sieve-like configuration with fine fenestrations. The saccules decreased fenestration numbers toward the trans-side and displayed a more plate-like appearance. The above findings indicate the following. (1) The Golgi saccules of osteoclasts have a three-dimensional structure comparable with that generally seen in other cell types. (2) The Golgi apparatus forms a porous multi-spherical structure around nuclei. Within the structure, in most cases a Golgi stack partitions the room into several compartments in each of which a nucleus fits. (3) The nuclear membrane synthesizes some kinds of proteins more stably and sufficiently than the rough endoplasmic reticulum. Consequently, the Golgi apparatus accumulates around nuclei with the cis-side facing the nucleus.
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Affiliation(s)
- Tsuneyuki Yamamoto
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine, Kita 13 Nishi7, Kita-ku, Sapporo, Japan
| | - Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine, Kita 13 Nishi7, Kita-ku, Sapporo, Japan
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine, Kita 13 Nishi7, Kita-ku, Sapporo, Japan
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine, Kita 13 Nishi7, Kita-ku, Sapporo, Japan
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Sakai S, Hongo H, Yamamoto T, Hasegawa T, Takeda S, Saito H, Endo K, Yogo K, Amizuka N. Sequential Treatment with Eldecalcitol After PTH Improves Bone Mechanical Properties of Lumbar Spine and Femur in Aged Ovariectomized Rats. Calcif Tissue Int 2019; 104:251-261. [PMID: 30467731 DOI: 10.1007/s00223-018-0497-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 11/17/2018] [Indexed: 11/25/2022]
Abstract
Parathyroid hormone (PTH) analogs have a powerful anabolic effect on bone and are used in the treatment of patients with severe osteoporosis. However, there are limitations to how long they can be safely administered. Withdrawal of PTH results in the cancelation of its effects, necessitating subsequent treatment to maintain the bone quantity and quality. This study assessed the effects of Eldecalcitol (ELD), an active vitamin D3 derivative, after PTH in estrogen-deficient osteoporotic rats. Six-month-old female rats were ovariectomized, and PTH administration was started 7 weeks later. After 4 weeks of PTH treatment, the animals were divided into three groups and either continued to receive PTH (PTH-PTH), or were switched to ELD (PTH-ELD) or vehicle (PTH-Veh) for an additional 4 weeks. In the femur, increased BMD by 4 weeks treatment of PTH was significantly reduced in PTH-Veh but not in PTH-PTH and PTH-ELD. The same tendency was observed in the lumbar vertebrae. MicroCT imaging and histomorphometry analysis revealed that the favorable bone structure changes by PTH administration were also maintained in the femurs and tibias of the PTH-PTH and PTH-ELD groups. Increased bone strength by 4-week treatment of PTH in lumber also maintained in PTH-ELD. Furthermore, minimodeling was observed in the PTH-ELD group. These results demonstrate that treatment with ELD sequentially following PTH prevented the bone quantity and strength reduction that accompanies PTH withdrawal in estrogen-deficient rats.
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Affiliation(s)
- Sadaoki Sakai
- Product Research Department, Chugai Pharmaceutical Co., Ltd, 1-135 Komakado, Gotemba, Shizuoka, 412-8513, Japan
- Medical Affairs Planning Department, Chugai Pharmaceutical Co., Ltd, Tokyo, Japan
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomomaya Yamamoto
- Department of Dentistry, Japan Self-Defense Force Hanshin Hospital, Kawanishi, Japan
| | - Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Satoshi Takeda
- Product Research Department, Chugai Pharmaceutical Co., Ltd, 1-135 Komakado, Gotemba, Shizuoka, 412-8513, Japan
| | - Hitoshi Saito
- Medical Affairs Planning Department, Chugai Pharmaceutical Co., Ltd, Tokyo, Japan
| | - Koichi Endo
- Medical Science Department, Chugai Pharmaceutical Co., Ltd, Tokyo, Japan
| | - Kenji Yogo
- Product Research Department, Chugai Pharmaceutical Co., Ltd, 1-135 Komakado, Gotemba, Shizuoka, 412-8513, Japan.
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
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30
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Hasegawa T, Yamamoto T, Sakai S, Miyamoto Y, Hongo H, Qiu Z, Abe M, Takeda S, Oda K, de Freitas PHL, Li M, Endo K, Amizuka N. Histological Effects of the Combined Administration of Eldecalcitol and a Parathyroid Hormone in the Metaphyseal Trabeculae of Ovariectomized Rats. J Histochem Cytochem 2018; 67:169-184. [PMID: 30311820 DOI: 10.1369/0022155418806865] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Intermittent administration of human parathyroid hormone (1-34) (hPTH(1-34)) promotes anabolic action in bone by stimulating bone remodeling, while eldecalcitol, an analog of active vitamin D3, suppresses osteoclastic bone resorption, and forms new bone by minimodeling. We have examined the biological effects of combined administration of eldecalcitol and hPTH(1-34) on 9-week-old Wistar rats that underwent an ovariectomy (OVX) or Sham operation. They were divided into a Sham group, OVX with vehicle (OVX group), OVX with 10 µg/kg/day of hPTH(1-34) (PTH group), OVX with 20 ng/kg/day of eldecalcitol (eldecalcitol group) or OVX with 10 μg/kg/day of hPTH(1-34), and 20 ng/kg/day of eldecalcitol (combined group) for 4 or 8 weeks. As a consequence, the combined group showed a marked increase in bone volume/tissue volume (BV/TV), trabecular thickness (Tb.Th), and trabecular number (Tb.N) than OVX and had the highest bone mineral density (BMD) compared with other groups. OVX and PTH groups exhibited a high osteoblastic surface/bone surface (Ob.S/BS), mineral apposition rate (MAR), and bone formation rate/bone surface (BFR/BS) indices and many TRAP-reactive osteoclasts. Contrastingly, eldecalcitol and combined groups tended to attenuate the indices of osteoclastic surface/bone surface (Oc.S/BS) and Ob.S/BS than that the other groups. The combined group revealed histological profiles of minimodeling- and remodeling-based bone formation. Thus, the combined administration of eldecalcitol and hPTH(1-34) augments their anabolic effects by means of minimodeling and remodeling.
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Affiliation(s)
- Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomomaya Yamamoto
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan.,Department of Dentistry, Japan Self Defense Force Hanshin Hospital, Kawanishi, Japan
| | | | - Yukina Miyamoto
- Department of Dentistry, International University of Health and Welfare Atami Hospital, Atami, Japan
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Zixuan Qiu
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | | | | | | | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University, Jinan, China
| | - Koichi Endo
- Chugai Pharmaceutical Co., Ltd., Tokyo, Japan
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
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31
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Hasegawa T, Yamamoto T, Hongo H, Qiu Z, Abe M, Kanesaki T, Tanaka K, Endo T, de Freitas PHL, Li M, Amizuka N. Three-dimensional ultrastructure of osteocytes assessed by focused ion beam-scanning electron microscopy (FIB-SEM). Histochem Cell Biol 2018; 149:423-432. [DOI: 10.1007/s00418-018-1645-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2018] [Indexed: 10/18/2022]
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32
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Sakurai A, Hasegawa T, Kudo A, Shen Z, Nagai T, Abe M, Yoshida T, Hongo H, Yamamoto T, Yamamoto T, Oda K, Freitas PHLD, Li M, Sano H, Amizuka N. Chronological immunolocalization of sclerostin and FGF23 in the mouse metaphyseal trabecular and cortical bone. Biomed Res 2017; 38:257-267. [PMID: 28794403 DOI: 10.2220/biomedres.38.257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To assess the chronological participation of sclerostin and FGF23 in bone metabolism, this study tracked the immunolocalization of sclerostin and FGF23 in the metaphyses of murine long bones from embryonic day 18 (E18) through 1 day after birth, 1 week, 2 weeks, 4 weeks, 8 weeks, and 20 weeks of age. We have selected two regions in the metaphyseal trabeculae for assessing sclerostin and FGF23 localization: close to the chondro-osseous junction, i.e., bone modeling site even in the adult animals, and the trabecular region distant from the growth plate, where bone remodeling takes place. As a consequence, sclerostin-immunopositive osteocytes could not be observed in both close and distant trabecular regions early at the embryonic and young adult stages. However, osteocytes gradually started to express sclerostin in the distant region earlier than in the close region of the trabeculae. Immunoreactivity for FGF23 was observed mainly in osteoblasts in the early stages, but detectable in osteocytes in the later stages of growth in trabecular and cortical bones. Fgf23 was weakly expressed in the embryonic and neonatal stages, while the receptors, Fgfr1c and αKlotho were strongly expressed in femora. At the adult stages, Fgf23 expression became more intense while Fgfr1c and aKlotho were weakly expressed. These findings suggest that sclerostin is secreted by osteocytes in mature bone undergoing remodeling while FGF23 is synthesized by osteoblasts and osteocytes depending on the developmental/growth stage. In addition, it appears that FGF23 acts in an autocrine and paracrine fashion in fetal and neonatal bones.
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Affiliation(s)
- Atsunaka Sakurai
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University.,Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University
| | - Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University
| | - Ai Kudo
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University.,Department of Crown and Bridge Prosthodontics, Graduate School of Dental Medicine, Hokkaido University
| | - Zhao Shen
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University.,Department of Oral and Maxillofacial Surgery, Graduate School of Dental Medicine, Hokkaido University
| | - Tomoya Nagai
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University.,Department of Oral Functional Prosthodontics, Graduate School of Dental Medicine, Hokkaido University
| | - Miki Abe
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University
| | - Taiji Yoshida
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University
| | - Tomomaya Yamamoto
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University.,Self- Defense Force Hanshin Hospital
| | - Tsuneyuki Yamamoto
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University
| | - Kimimitsu Oda
- Biochemistry, Niigata University Graduate School of Medical and Dental Sciences
| | | | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University
| | - Hidehiko Sano
- Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University
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33
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Hongo H, Sasaki M, Kobayashi S, Hasegawa T, Yamamoto T, Tsuboi K, Tsuchiya E, Nagai T, Khadiza N, Abe M, Kudo A, Oda K, Henrique Luiz de Freitas P, Li M, Yurimoto H, Amizuka N. Localization of Minodronate in Mouse Femora Through Isotope Microscopy. J Histochem Cytochem 2017; 64:601-22. [PMID: 27666429 DOI: 10.1369/0022155416665577] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Accepted: 07/19/2016] [Indexed: 01/22/2023] Open
Abstract
Minodronate is highlighted for its marked and sustained effects on osteoporotic bones. To determine the duration of minodronate's effects, we have assessed the localization of the drug in mouse bones through isotope microscopy, after labeling it with a stable nitrogen isotope ([(15)N]-minodronate). In addition, minodronate-treated bones were assessed by histochemistry and transmission electron microscopy (TEM). Eight-week-old male ICR mice received [(15)N]-minodronate (1 mg/kg) intravenously and were sacrificed after 3 hr, 24 hr, 1 week, and 1 month. Isotope microscopy showed that [(15)N]-minodronate was present mainly beneath osteoblasts rather than nearby osteoclasts. At 3 hr after minodronate administration, histochemistry and TEM showed osteoclasts with well-developed ruffled borders. However, osteoclasts were roughly attached to the bone surfaces and did not feature ruffled borders at 24 hr after minodronate administration. The numbers of tartrate-resistant acid phosphatase-positive osteoclasts and alkaline phosphatase-reactive osteoblastic area were not reduced suddenly, and apoptotic osteoclasts appeared in 1 week and 1 month after the injections. Von Kossa staining demonstrated that osteoclasts treated with minodronate did not incorporate mineralized bone matrix. Taken together, minodronate accumulates in bone underneath osteoblasts rather than under bone-resorbing osteoclasts; therefore, it is likely that the minodronate-coated bone matrix is resistant to osteoclastic resorption, which results in a long-lasting and bone-preserving effect.
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Affiliation(s)
- Hiromi Hongo
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine (HH, MS, TH, TY, KT, ET, TN, NK, MA, AK, NA) Hokkaido University, Sapporo, Japan
| | - Muneteru Sasaki
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine (HH, MS, TH, TY, KT, ET, TN, NK, MA, AK, NA) Hokkaido University, Sapporo, Japan
| | - Sachio Kobayashi
- Hokkaido University, Sapporo, JapanNatural History Sciences, Isotope Imaging Laboratory, Creative Research Institution (SK, HY) Hokkaido University, Sapporo, Japan
| | - Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine (HH, MS, TH, TY, KT, ET, TN, NK, MA, AK, NA) Hokkaido University, Sapporo, Japan
| | - Tomomaya Yamamoto
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine (HH, MS, TH, TY, KT, ET, TN, NK, MA, AK, NA) Hokkaido University, Sapporo, Japan
| | - Kanako Tsuboi
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine (HH, MS, TH, TY, KT, ET, TN, NK, MA, AK, NA) Hokkaido University, Sapporo, Japan
| | - Erika Tsuchiya
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine (HH, MS, TH, TY, KT, ET, TN, NK, MA, AK, NA) Hokkaido University, Sapporo, Japan
| | - Tomoya Nagai
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine (HH, MS, TH, TY, KT, ET, TN, NK, MA, AK, NA) Hokkaido University, Sapporo, Japan
| | - Naznin Khadiza
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine (HH, MS, TH, TY, KT, ET, TN, NK, MA, AK, NA) Hokkaido University, Sapporo, Japan
| | - Miki Abe
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine (HH, MS, TH, TY, KT, ET, TN, NK, MA, AK, NA) Hokkaido University, Sapporo, Japan
| | - Ai Kudo
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine (HH, MS, TH, TY, KT, ET, TN, NK, MA, AK, NA) Hokkaido University, Sapporo, Japan
| | - Kimimitsu Oda
- Division of Biochemistry, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan (KO)
| | | | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, School of Stomatology, Shandong University, Jinan, China (ML)
| | - Hisayoshi Yurimoto
- Hokkaido University, Sapporo, JapanNatural History Sciences, Isotope Imaging Laboratory, Creative Research Institution (SK, HY) Hokkaido University, Sapporo, Japan
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine (HH, MS, TH, TY, KT, ET, TN, NK, MA, AK, NA) Hokkaido University, Sapporo, Japan
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Murakami S, Miyaji H, Nishida E, Kawamoto K, Miyata S, Takita H, Akasaka T, Fugetsu B, Iwanaga T, Hongo H, Amizuka N, Sugaya T, Kawanami M. Dose effects of beta-tricalcium phosphate nanoparticles on biocompatibility and bone conductive ability of three-dimensional collagen scaffolds. Dent Mater J 2017; 36:573-583. [PMID: 28450672 DOI: 10.4012/dmj.2016-295] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Three-dimensional collagen scaffolds coated with beta-tricalcium phosphate (β-TCP) nanoparticles reportedly exhibit good bioactivity and biodegradability. Dose effects of β-TCP nanoparticles on biocompatibility and bone forming ability were then examined. Collagen scaffold was applied with 1, 5, 10, and 25 wt% β-TCP nanoparticle dispersion and designated TCP1, TCP5, TCP10, and TCP25, respectively. Compressive strength, calcium ion release and enzyme resistance of scaffolds with β-TCP nanoparticles applied increased with β-TCP dose. TCP5 showed excellent cell-ingrowth behavior in rat subcutaneous tissue. When TCP10 was applied, osteoblastic cell proliferation and rat cranial bone augmentation were greater than for any other scaffold. The bone area of TCP10 was 7.7-fold greater than that of non-treated scaffold. In contrast, TCP25 consistently exhibited adverse biological effects. These results suggest that the application dose of β-TCP nanoparticles affects the scaffold bioproperties; consequently, the bone conductive ability of TCP10 was remarkable.
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Affiliation(s)
- Shusuke Murakami
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine
| | - Hirofumi Miyaji
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine
| | - Erika Nishida
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine
| | - Kohei Kawamoto
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine
| | - Saori Miyata
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine
| | - Hiroko Takita
- Support Section for Education and Research, Hokkaido University Graduate School of Dental Medicine
| | - Tsukasa Akasaka
- Department of Dental Materials and Engineering, Hokkaido University Graduate School of Dental Medicine
| | - Bunshi Fugetsu
- Nano-Agri Lab, Policy Alternatives Research Institute, The University of Tokyo
| | - Toshihiko Iwanaga
- Laboratory of Histology and Cytology, Hokkaido University Graduate School of Medicine
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine
| | - Tsutomu Sugaya
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine
| | - Masamitsu Kawanami
- Department of Periodontology and Endodontology, Hokkaido University Graduate School of Dental Medicine
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Hasegawa T, Endo T, Tsuchiya E, Kudo A, Shen Z, Moritani Y, Abe M, Yamamoto T, Hongo H, Tsuboi K, Yoshida T, Nagai T, Khadiza N, Yokoyama A, Luiz de Freitas PH, Li M, Amizuka N. Biological application of focus ion beam-scanning electron microscopy (FIB-SEM) to the imaging of cartilaginous fibrils and osteoblastic cytoplasmic processes. J Oral Biosci 2017. [DOI: 10.1016/j.job.2016.11.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hikone K, Hasegawa T, Tsuchiya E, Hongo H, Sasaki M, Yamamoto T, Kudo A, Oda K, Haraguchi M, de Freitas PHL, Li M, Iida J, Amizuka N. Histochemical Examination on Periodontal Tissues of Klotho-Deficient Mice Fed With Phosphate-Insufficient Diet. J Histochem Cytochem 2017; 65:207-221. [PMID: 28122194 DOI: 10.1369/0022155416689670] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
To elucidate which of elevated serum concentration of inorganic phosphate (Pi) or disrupted signaling linked to αklotho/fibroblast growth factor 23 (FGF23) is a predominant regulator for senescence-related degeneration seen in αKlotho-deficient mice, we have examined histological alteration of the periodontal tissues in the mandibular interalveolar septum of αKlotho-deficient mice fed with Pi-insufficient diet. We prepared six groups of mice: wild-type, kl/kl, and αKlotho-/- mice with normal diet or low-Pi diet. As a consequence, kl/klnorPi and αKlotho-/-norPi mice showed the same abnormalities in periodontal tissues: intensely stained areas with hematoxylin in the interalveolar septum, dispersed localization of alkaline phosphatase-positive osteoblasts and tartrate-resistant acid phosphatase-reactive osteoclasts, and accumulation of dentin matrix protein 1 in the osteocytic lacunae. Although kl/kllowPi mice improved these histological abnormalities, αKlotho-/- lowPi mice failed to normalize those. Gene expression of αKlotho was shown to be increased in kl/kl lowPi specimens. It seems likely that histological abnormalities of kl/kl mice have been improved by the rescued expression of αKlotho, rather than low concentration of serum Pi. Thus, the histological malformation in periodontal tissues in αKlotho-deficient mice appears to be due to not only increased concentration of Pi but also disrupted αklotho/FGF23 signaling.
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Affiliation(s)
- Kumiko Hikone
- Department of Developmental Biology of Hard Tissue (KH, TH, ET, HH, TY, AK, MH, NA), Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.,Department of Orthodontics (KH, JI), Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue (KH, TH, ET, HH, TY, AK, MH, NA), Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Erika Tsuchiya
- Department of Developmental Biology of Hard Tissue (KH, TH, ET, HH, TY, AK, MH, NA), Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue (KH, TH, ET, HH, TY, AK, MH, NA), Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Muneteru Sasaki
- Department of Applied Prosthodontics, Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan (MS)
| | - Tomomaya Yamamoto
- Department of Developmental Biology of Hard Tissue (KH, TH, ET, HH, TY, AK, MH, NA), Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Ai Kudo
- Department of Developmental Biology of Hard Tissue (KH, TH, ET, HH, TY, AK, MH, NA), Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Kimimitsu Oda
- Division of Biochemistry, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan (KO)
| | - Mai Haraguchi
- Department of Developmental Biology of Hard Tissue (KH, TH, ET, HH, TY, AK, MH, NA), Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | | | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, School of Stomatology, Shandong University, Jinan, China (ML)
| | - Junichiro Iida
- Department of Orthodontics (KH, JI), Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue (KH, TH, ET, HH, TY, AK, MH, NA), Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
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Hasegawa T, Yamamoto T, Tsuchiya E, Hongo H, Tsuboi K, Kudo A, Abe M, Yoshida T, Nagai T, Khadiza N, Yokoyama A, Oda K, Ozawa H, de Freitas PHL, Li M, Amizuka N. Ultrastructural and biochemical aspects of matrix vesicle-mediated mineralization. Jpn Dent Sci Rev 2016; 53:34-45. [PMID: 28479934 PMCID: PMC5405202 DOI: 10.1016/j.jdsr.2016.09.002] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 09/14/2016] [Accepted: 09/21/2016] [Indexed: 01/20/2023] Open
Abstract
Matrix vesicle-mediated mineralization is an orchestrated sequence of ultrastructural and biochemical events that lead to crystal nucleation and growth. The influx of phosphate ions into the matrix vesicle is mediated by several proteins such as TNAP, ENPP1, Pit1, annexin and so forth. The catalytic activity of ENPP1 generates pyrophosphate (PPi) using extracellular ATPs as a substrate, and the resultant PPi prevents crystal overgrowth. However, TNAP hydrolyzes PPi into phosphate ion monomers, which are then transported into the matrix vesicle through Pit1. Accumulation of Ca2+ and PO43− inside matrix vesicles then induces crystalline nucleation, with calcium phosphate crystals budding off radially, puncturing the matrix vesicle’s membrane and finally growing out of it to form mineralized nodules.
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Affiliation(s)
- Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomomaya Yamamoto
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Erika Tsuchiya
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.,Department of Oral Diagnosis and Medicine, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Kanako Tsuboi
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.,Department of Oral Diagnosis and Medicine, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Ai Kudo
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Miki Abe
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Taiji Yoshida
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoya Nagai
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.,Department of Oral Functional Prothodontics, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Naznin Khadiza
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.,Department of Dentistry for Children and Disabled Person, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Ayako Yokoyama
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.,Department of Gerodontology, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Kimimitsu Oda
- Division of Biochemistry, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Hidehiro Ozawa
- Institute for Oral Science, Graduate School of Oral Medicine, Matsumoto Dental University, Shiojiri, Japan
| | | | - Minqi Li
- Division of Basic Science of Stomatology, The School of Stomatology, Shandong University, Jinan, China
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
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Yamamoto T, Hasegawa T, Yamamoto T, Hongo H, Amizuka N. Histology of human cementum: Its structure, function, and development. Jpn Dent Sci Rev 2016; 52:63-74. [PMID: 28408958 PMCID: PMC5390338 DOI: 10.1016/j.jdsr.2016.04.002] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 02/01/2016] [Accepted: 04/01/2016] [Indexed: 11/09/2022] Open
Abstract
Cementum was first demonstrated by microscopy, about 180 years ago. Since then the biology of cementum has been investigated by the most advanced techniques and equipment at that time in various fields of dental sciences. A great deal of data on cementum histology have been accumulated. These data have been obtained from not only human, but also non-human animals, in particular, rodents such as the mouse and rat. Although many dental histologists have reviewed histology of human cementum, some descriptions are questionable, probably due to incorrect comparison of human and rodent cementum. This review was designed to introduce current histology of human cementum, i.e. its structure, function, and development and to re-examine the most questionable and controversial conclusions made in previous reports.
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Affiliation(s)
- Tsuneyuki Yamamoto
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan
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Yamamoto T, Hasegawa T, Sasaki M, Hongo H, Tsuboi K, Shimizu T, Ota M, Haraguchi M, Takahata M, Oda K, Luiz de Freitas PH, Takakura A, Takao-Kawabata R, Isogai Y, Amizuka N. Frequency of Teriparatide Administration Affects the Histological Pattern of Bone Formation in Young Adult Male Mice. Endocrinology 2016; 157:2604-20. [PMID: 27227535 DOI: 10.1210/en.2015-2028] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Evidence supports that daily and once-weekly administration of teriparatide, human (h)PTH(1-34), enhance bone mass in osteoporotic patients. However, it is uncertain whether different frequencies of hPTH(1-34) administration would induce bone formation similarly in terms of quantity and quality. To investigate that issue, mice were subjected to different frequencies of PTH administration, and their bones were histologically examined. Frequencies of administration were 1 time/2 days, 1 time a day, and 2 and 4 times a day. Mice were allocated to either to control or to 3 different dosing regimens: 80 μg/kg of hPTH(1-34) per injection (80 μg/kg per dose), 80 μg/kg of hPTH(1-34) per day (80 μg/kg · d), or 20 μg/kg of hPTH(1-34) per day (20 μg/kg · d). With the regimens of 80 μg/kg per dose and 80 μg/kg · d, high-frequency hPTH(1-34) administration increased metaphyseal trabecular number. However, 4 doses per day induced the formation of thin trabeculae, whereas the daily PTH regimen resulted in thicker trabeculae. A similar pattern was observed with the lower daily hPTH(1-34) dose (20 μg/kg · d): more frequent PTH administration led to the formation of thin trabeculae, showing a thick preosteoblastic cell layer, several osteoclasts, and scalloped cement lines that indicated accelerated bone remodeling. On the other hand, low-frequency PTH administration induced new bone with mature osteoblasts lying on mildly convex surfaces representative of arrest lines, which suggests minimodeling-based bone formation. Thus, high-frequency PTH administration seems to increase bone mass rapidly by forming thin trabeculae through accelerated bone remodeling. Alternatively, low-frequency PTH administration leads to the formation of thicker trabeculae through bone remodeling and minimodeling.
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Affiliation(s)
- Tomomaya Yamamoto
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Muneteru Sasaki
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Kanako Tsuboi
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Tomohiro Shimizu
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Masahiro Ota
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Mai Haraguchi
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Masahiko Takahata
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Kimimitsu Oda
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Paulo Henrique Luiz de Freitas
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Aya Takakura
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Ryoko Takao-Kawabata
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Yukihiro Isogai
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue (T.Y., T.H., H.H., K.T., M.H., N.A.), Graduate School of Dental Medicine, Hokkaido University, Sapporo, 060-8586 Japan; Department of Applied Prosthodontics (M.S.), Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588 Japan; Department of Orthopedic Surgery Graduate School of Medicine (T.S., M.O., M.T.), Hokkaido University, Sapporo, 951-8514 Japan; Division of Biochemistry (K.O.), Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8514 Japan; Department of Dentistry (P.H.L.d.F.), Federal University of Sergipe at Lagarto, Campus Legarto, 49400-000 Brazil; and Asahi Kasei Pharma Co. Ltd (A.T., R.T.-K., Y.I.), Tokyo, 101-8101 Japan
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Nagata H, Hongo H, Kawai D, Takahashi R, Hashimoto H, Tachibana H. SU-F-T-267: A Clarkson-Based Independent Dose Verification for the Helical Tomotherapy. Med Phys 2016. [DOI: 10.1118/1.4956407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Tsuboi K, Hasegawa T, Yamamoto T, Sasaki M, Hongo H, de Freitas PHL, Shimizu T, Takahata M, Oda K, Michigami T, Li M, Kitagawa Y, Amizuka N. Effects of drug discontinuation after short-term daily alendronate administration on osteoblasts and osteocytes in mice. Histochem Cell Biol 2016; 146:337-50. [PMID: 27235014 DOI: 10.1007/s00418-016-1450-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/17/2016] [Indexed: 12/17/2022]
Abstract
In order to determine whether osteoclastic bone resorption is restarted after withdrawn of bisphosphonates, we conducted histological examinations on murine osteoclasts, osteoblasts and osteocytes after discontinuation of a daily regimen of alendronate (ALN) with a dosage of 1 mg/kg/day for 10 days. After drug discontinuation, metaphyseal trabecular number and bone volume remained unaltered for the first 4 days. Osteoclast number did not increase, while the number of apoptotic osteoclasts was elevated. On the other hand, tissue non-specific alkaline phosphatase-immunoreactive area was markedly reduced after ALN discontinuation. In addition, osteocytes showed an atrophic profile with empty lacunar areas during and after ALN treatment. Interestingly, as early as 36 h after a single ALN injection, osteocytes show signs of atrophy despite the presence of active osteoblasts. Structured illumination microscopy system showed shortening of osteocytic cytoplasmic processes after drug cessation, suggesting a possible morphological and functional disconnection between osteocytes and osteoblasts. Taken together, it appears that osteoclastic bone resorption is not resumed after ALN discontinuation; also, osteoblasts and osteocytes hardly seem to recover once they are inactivated and atrophied by ALN. In summary, it seems that one must pay more attention to the responses of osteoblasts and osteocytes, rather focusing on the resuming of osteoclastic bone resorption after the ALN discontinuation.
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Affiliation(s)
- Kanako Tsuboi
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan.,Department of Oral Diagnosis and Medicine, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan
| | - Tomomaya Yamamoto
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan
| | - Muneteru Sasaki
- Unit of Translational Medicine, Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan
| | | | - Tomohiro Shimizu
- Department of Orthopedic Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Masahiko Takahata
- Department of Orthopedic Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Kimimitsu Oda
- Division of Biochemistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Toshimi Michigami
- Department of Bone and Mineral, Research Institute, Osaka Medical Center for Maternal and Child Health, Osaka, Japan
| | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University, Jinan, China
| | - Yoshimasa Kitagawa
- Department of Oral Diagnosis and Medicine, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, 060-8586, Japan.
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Tanaka Y, Hasegawa T, Yamada T, Yamamoto T, Sasaki M, Hongo H, Tsuboi K, Haraguchi M, de Freitas PHL, Li M, Oda K, Totsuka Y, Tei K, Amizuka N. Histological assessment for femora of ovariectomized obesity (db/db) mice carrying mutated leptin receptor. Histol Histopathol 2016; 31:1315-26. [PMID: 26984199 DOI: 10.14670/hh-11-758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In order to provide a clue to understand the interplay between leptin and estrogen, we have examined femoral metaphyses of ovariectomized db/db mice carrying a mutated leptin receptor. We performed ovariectomy (OVX) or sham-operation (sham) on 12-week old female wild-type and db/db mice, and then, after 8 weeks, divided the animals into four groups: wild-type sham, wild-type OVX, db/db sham and db/db OVX. Samples from all groups were prepared for histochemical and ultrastructural examinations. As a result, db/db sham mice showed a reduced number and thickness of metaphyseal trabeculae and excessive adipose tissue when compared to wild-type sham mice. The wild-type OVX group exhibited markedly diminished trabecular number, as well as lower populations of osteoblasts and osteoclasts in comparison to wild-type sham group. On the other hand, trabecular numbers were similar for the two db/db groups, suggesting that the effect of the ovariectomy, i.e., estrogen deficiency may be lessened in this animal model. Leptin receptor was mainly found in osteoblasts and in bone marrow stromal cells including adipocytes. In addition, the expression of estrogen receptor did not seem to change after OVX in wild-type mice and in db/db mice. Both db/db sham and OVX mice featured many adipocytes close to the metaphyseal chondro-osseous junction, while osteoblasts accumulated glycogen granules and lipid droplets. Therefore, it seems likely that the disruption of leptin signaling in db/db mice shifts the cell differentiation cascade towards the adipocyte lineage, resulting in an osteoporotic bone independently of estrogen deficiency.
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Affiliation(s)
- Yusuke Tanaka
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.,Department of Oral and Maxillofacial Surgery, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tamaki Yamada
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Tomomaya Yamamoto
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Muneteru Sasaki
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Kanako Tsuboi
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Mai Haraguchi
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | | | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, The School of Stomatology, Shandong University, Jinan, China
| | - Kimimitsu Oda
- Division of Biochemistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Yasunori Totsuka
- Department of Oral and Maxillofacial Surgery, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Kanchu Tei
- Department of Oral and Maxillofacial Surgery, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.
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Tsuboi K, Hasegawa T, Hongo H, Yurimoto H, Kobayashi S. [Bone Cell Biology Assessed by Microscopic Approach. Novel insights about bone tissue by new microscopy systems]. Clin Calcium 2015; 25:1505-1511. [PMID: 26412730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The osteocytic cytoplasmic processes show regularly-arranged three-dimensional structure, a cellular network called osteocytic lacunar-canalicular system (OLCS). We have demonstrated the ultrastructure of the cellular network of OLCS by means of a structured illumination microscope method (SIM) and a Focused Ion Beam-Scanning Electron Microscope (FIB-SEM). We also attempted to localize exogenously-administered minodronate, a new generation of bisphosphonate, as well as calcium deposition onto the bone forming surface, using an isotope microscope system. Recent devised microscopic technique may provide new insights in the research field of bone.
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Affiliation(s)
- Kanako Tsuboi
- Department of Developmental Biology of Hard Tissue, Division of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Japan
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44
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Saito M, Hongo H. [Bone Cell Biology Assessed by Microscopic Approach. Micro- and nanomechanical analysis of bone]. Clin Calcium 2015; 25:1521-1528. [PMID: 26412732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
For Stiffness, we have several ways, Vicker's, Nano Indentor and NanoIndentation with AFM. Recent study needs several nm, tens of nm scale lateral resolution. For this request, AFM supply new technology, PeakForce QNM®, is only way to measure sub molecular level modulus mapping. In this article, introduce several data and specially talk about bone modulus near osteocytic lacunae treated with PTH which is considering to resolve bone matrix around the osteocytic lacunae.
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Affiliation(s)
- Masami Saito
- Application Group, Nano Surface Business, Bruker AXS K.K., Japan
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Yamamoto T, Yamada T, Yamamoto T, Hasegawa T, Hongo H, Oda K, Amizuka N. Hertwig's Epithelial Root Sheath Fate during Initial Cellular Cementogenesis in Rat Molars. Acta Histochem Cytochem 2015; 48:95-101. [PMID: 26160988 PMCID: PMC4491499 DOI: 10.1267/ahc.15006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 05/07/2015] [Indexed: 11/22/2022] Open
Abstract
To elucidate the fate of the epithelial root sheath during initial cellular cementogenesis, we examined developing maxillary first molars of rats by immunohistochemistry for keratin, vimentin, and tissue non-specific alkaline phosphatase (TNALP) and by TdT-mediated dUTP nick end labeling (TUNEL). The advancing root end was divided into three sections, which follow three distinct stages of initial cellular cementogenesis: section 1, where the epithelial sheath is intact; section 2, where the epithelial sheath becomes fragmented; and section 3, where initial cellular cementogenesis begins. After fragmentation of the epithelial sheath, many keratin-positive epithelial sheath cells were embedded in the rapidly growing cellular cementum. A few unembedded epithelial cells located on the cementum surface. Dental follicle cells, precementoblasts, and cementoblasts showed immunoreactivity for vimentin and TNALP. In all three sections, there were virtually no cells possessing double immunoreactivity for vimentin-keratin or TNALP-keratin and only embedded epithelial cells showed TUNEL reactivity. Taken together, these findings suggest that: (1) epithelial sheath cells divide into two groups; one group is embedded in the cementum and thereafter dies by apoptosis, and the other survives on the cementum surface as epithelial cell rests of Malassez; and (2) epithelial sheath cells do not undergo epithelial-mesenchymal transition during initial cellular cementogenesis.
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Affiliation(s)
- Tsuneyuki Yamamoto
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine
| | - Tamaki Yamada
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine
| | - Tomomaya Yamamoto
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine
| | - Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine
| | - Kimimitsu Oda
- Division of Biochemistry, Niigata University Graduate School of Medical and Dental Sciences
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue, Hokkaido University Graduate School of Dental Medicine
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Hasegawa T, Yamamoto T, Hongo H, Tsuboi K, Amizuka N. [Vascular Calcification - Pathological Mechanism and Clinical Application - . Vascular calcification in klotho deficient environment]. Clin Calcium 2015; 25:693-699. [PMID: 25926573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Klotho deficient (kl/kl) mice exhibit Möncheberg's vascular calcification in the tunica media due to hyperphosphatemia and hypercalcemia by mediating the disrupted signaling of FGF23/klotho axis. Recent studies have hypothesized the mechanism of medial vascular calcification : Vascular smooth muscle cells acquired excessive intake of phosphate ions undergo a phenotypic differentiation into osteoblasts and induce biological calcification in the tunica media. It is useful to clarify the underlying cellular mechanism of vascular calcification for the development of the treatment and preventive medicine. This review will introduce the histological and ultrastructual findings on medial vascular calcification in kl/kl mice.
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Affiliation(s)
- Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Japan
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Hongo H, Nagata H, Omura M, Matsui K, Tayama Y, Takano S, Yoshida M, Sakae T. EP-1641: Effectiveness of dose reduction in rectum for prostate cancer using helical radiation in Tomotherapy. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)41633-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Liu H, Guo J, Wei S, Lv S, Feng W, Cui J, Hasegawa T, Hongo H, Yang Y, Li X, Oda K, Amizuka N, Li M. Expression of matrix Gla protein and osteocalcin in the developing tibial epiphysis of mice. Histol Histopathol 2015; 30:77-85. [PMID: 24956112 DOI: 10.14670/hh-30.77] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study aimed to investigate the expression of matrix Gla protein (MGP) and osteocalcin (OCN) in the tibial epiphysis of developing mice. At 1, 2, 3, and 4 weeks after birth, tibiae were removed and processed for histochemical observations and western blot analyses under anesthesia. To evaluate bone volume, the specimens were scanned with Micro CT Scanner from the articular cartilage through the growth plate, along the long axis of tibia. At 1 week after birth, OCN reactivity was faint in the region of vascular invasion, while hardly any MGP reactivity was discernible. Subsequently, MGP reactivity was seen on the cartilaginous lacunar walls of hypertrophic chondrocytes, while OCN reactivity was evenly found not only in the bone matrix, but also in the cartilaginous lacunar walls and on the bone surfaces. Furthermore, double-immunostaining clearly showed that MGP reactivity appeared closer to the cartilage matrix than OCN reactivity until postnatal week 3. Interestingly, the immunoreactivities for MGP and OCN both showed tidemarks in the articular cartilage at postnatal week 4, and MGP reactivity was more intense than OCN reactivity. Statistical analyses showed an overall upward trend in MGP and OCN expression levels during tibial epiphysis development, even though OCN was more abundant than MGP at every time-point. Taken together, our findings suggest that the expression of MGP and OCN increased gradually in the murine developing tibial epiphysis, and the two mineral-associated proteins may occur at the same location during a particular period, but at different levels.
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Affiliation(s)
- Hongrui Liu
- Department of Bone Metabolism, School of Stomatology Shandong University, Shandong Provincial Key Laboratory of Oral Biomedicine, Jinan, China
| | - Jie Guo
- Department of Bone Metabolism, School of Stomatology Shandong University, Shandong Provincial Key Laboratory of Oral Biomedicine, Jinan, China
| | - Shanliang Wei
- Department of Oral and Maxillofacial Surgery, College of Stomatology Guangxi Medical University, Nanning, China
| | - Shengyu Lv
- Department of Bone Metabolism, School of Stomatology Shandong University, Shandong Provincial Key Laboratory of Oral Biomedicine, Jinan, China
| | - Wei Feng
- Department of Bone Metabolism, School of Stomatology Shandong University, Shandong Provincial Key Laboratory of Oral Biomedicine, Jinan, China
| | - Jian Cui
- Department of Bone Metabolism, School of Stomatology Shandong University, Shandong Provincial Key Laboratory of Oral Biomedicine, Jinan, China
| | - Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Hiromi Hongo
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Yang Yang
- Department of Cell Biology, Shandong University Medical School, Jinan, China
| | - Xiangzhi Li
- Department of Cell Biology, Shandong University Medical School, Jinan, China
| | - Kimimitsu Oda
- Division of Biochemistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Norio Amizuka
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Minqi Li
- Department of Bone Metabolism, School of Stomatology Shandong University, Shandong Provincial Key Laboratory of Oral Biomedicine, Jinan, China.
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Yamamoto T, Yamamoto T, Yamada T, Hasegawa T, Hongo H, Oda K, Amizuka N. Hertwig’s epithelial root sheath cell behavior during initial acellular cementogenesis in rat molars. Histochem Cell Biol 2014; 142:489-96. [DOI: 10.1007/s00418-014-1230-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/13/2014] [Indexed: 01/28/2023]
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50
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Hasegawa T, Amizuka N, Yamada T, Liu Z, Miyamoto Y, Yamamoto T, Sasaki M, Hongo H, Suzuki R, de Freitas PHL, Yamamoto T, Oda K, Li M. Sclerostin is differently immunolocalized in metaphyseal trabecules and cortical bones of mouse tibiae. Biomed Res 2014; 34:153-9. [PMID: 23782749 DOI: 10.2220/biomedres.34.153] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Sclerostin, an osteocyte-derived molecule, has been reported to serve as a negative regulator of osteoblastic activity as well as bone remodeling. However, there is no report that verified the regional difference for sclerostin synthesis, and in this study we have investigated immunolocalization of sclerostin by comparing dentin matrix protein (DMP) 1, an osteocyte-derived factor broadly expressed in tibial metaphyses and cortical bone. In metaphyseal primary trabecules, a site of bone modeling, strong DMP1-reactivity was observed in osteocytic lacunar-canalicular system (OLCS), while faint staining for sclerostin was visible only in a few osteocytes. In secondary trabecules, in which bone remodeling begins, some osteocytes showed intense sclerostin-immunopositivity, though there were many DMP1-positive osteocytes. In cortical bone, there were more osteocytes reactive for sclerostin, when compared with those in the secondary trabecules. Silver impregnation verified that immature, primary trabecules contained randomly-oriented OLCS, while mature, cortical bone showed geometrically well-arrangement of OLCS. Taken together, though DMP1 is broadly synthesized in bone, sclerostin appears to be abundantly synthesized in regular OLCS of cortical bone, but less produced in irregular OLCS as seen in primary trabecules, indicating the regional difference for sclerostin synthesis.
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Affiliation(s)
- Tomoka Hasegawa
- Department of Developmental Biology of Hard Tissue, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
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