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Tanaka H, Fukawa Y, Yamamoto K, Tanimoto K, Takemoto A, Hasumi H, Hirakawa A, Ishikawa Y, Fukuda S, Waseda Y, Yoshida S, Yokoyama M, Campbell S, Fujii Y. Renal parenchymal infiltration or micronodular spread in non-metastatic clear cell renal cell carcinoma: Prognostic impact and genomic backgrounds. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00515-8] [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: 02/12/2023]
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2
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Miller C, Small W, Martin B, Pham N, Tanimoto K, Faaiza V, Godellas C, Thomas T. How Should We Proceed with ypN+ Breast Cancer Following Positive Sentinel Lymph Node Biopsy after Neoadjuvant Chemotherapy? Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.1583] [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]
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Mizutani M, Fukumori K, Koshida I, Tanimoto K, Kino-oka M. Development of a novel modular system for cell production: Improvement of production efficiency in operation by flexible modular platform (fMP). Cytotherapy 2018. [DOI: 10.1016/j.jcyt.2018.02.191] [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: 11/26/2022]
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4
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Kojima S, Kaku M, Yamamoto I, Yasuhara Y, Sumi H, Yamamoto T, Yashima Y, Izumino J, Nakajima K, Nagano Y, Kono M, Yoshimura A, Ueasa M, Tanimoto K. Tongue-palatal contact changes in patients with skeletal mandibular prognathism after sagittal split ramus osteotomy: an electropalatography study. J Oral Rehabil 2017; 44:673-682. [PMID: 28581686 DOI: 10.1111/joor.12530] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 05/31/2017] [Indexed: 11/28/2022]
Abstract
The purpose of this study was to investigate the changes in tongue-palatal contact patterns using electropalatography (EPG) before and after sagittal split ramus osteotomy (SSRO) in patients with mandibular prognathism. Nine clients who underwent SSRO for mandibular setback and seven control subjects were participated in this study. Tongue-palatal contact patterns for /t/, /s/ and /k/ production were investigated using EPG before surgery and 3 months after surgery. The mean value of whole total of palate contact (WT) in the maximum contact frame was examined before and after SSRO. The correlation quantity between the change of center of gravity (COG) value and the amount of mandibular setback was also evaluated. The mean value of WT for /t/ and /s/ significantly increased after SSRO, and the EPG pattern became normal. However, a remarkable change in WT for /k/ was not observed, and the mean value was significantly larger in the SSRO group before and after surgery than in the control group. A negative correlation between COG variation and the amount of mandibular setback for /t/ and positive correlation for /s/ was observed. This study demonstrated that tongue-palatal contact patterns for /t/ and /s/ articulation improved clearly after SSRO. There was a significant correlation between COG variation and the amount of mandibular setback. However, no significant change was detected through perceptual assessment before and after SSRO. Further investigation is needed to determine whether these results will change over time.
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Affiliation(s)
- S Kojima
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Hiroshima, Japan
| | - M Kaku
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Hiroshima, Japan
| | - I Yamamoto
- EPG Research Center, Yamamoto Dental Clinic, Hyogo, Japan
| | - Y Yasuhara
- Speech Clinic Division of Specific Dentistry, Hiroshima University Hospital, Hiroshima, Japan
| | - H Sumi
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Hiroshima, Japan
| | - T Yamamoto
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Hiroshima, Japan
| | - Y Yashima
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Hiroshima, Japan
| | - J Izumino
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Hiroshima, Japan
| | - K Nakajima
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Hiroshima, Japan
| | - Y Nagano
- Department of Rehabilitation Medicine, Hiroshima University Hospital, Hiroshima, Japan
| | - M Kono
- Department of Rehabilitation Medicine, Hiroshima University Hospital, Hiroshima, Japan
| | - A Yoshimura
- Department of Rehabilitation Medicine, Hiroshima University Hospital, Hiroshima, Japan
| | - M Ueasa
- Department of Rehabilitation Medicine, Hiroshima University Hospital, Hiroshima, Japan
| | - K Tanimoto
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Hiroshima, Japan
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Tsukatani K, Ueda Y, Tanimoto K, Lee HT, Ohtsuka Y, Taniguchi M, Inoue T, Sakamoto K, Takagi I, Yoshida N. Deuterium Retention in Damaged Tungsten. Fusion Science and Technology 2017. [DOI: 10.13182/fst11-a12727] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Tsukatani
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Y. Ueda
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - K. Tanimoto
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - H. T. Lee
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Y. Ohtsuka
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - M. Taniguchi
- Japan Atomic Energy Agency: 801-1 Mukoyama, Naka, Ibaraki, Japan
| | - T. Inoue
- Japan Atomic Energy Agency: 801-1 Mukoyama, Naka, Ibaraki, Japan
| | - K. Sakamoto
- Japan Atomic Energy Agency: 801-1 Mukoyama, Naka, Ibaraki, Japan
| | - I. Takagi
- Graduate School of Engineering, Kyoto University: Yoshidahonmachi, Sakyo, Kyoto, Japan
| | - N. Yoshida
- Interdiscplinary Graduate School of Engineering Sciences, Kyusyu University: 6-1 Kasugakoen, Kasuga, Fukuoka, Japan
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Taguchi A, Suei Y, Sanada M, Higashi Y, Ohtsuka M, Nakamoto T, Tsuda M, Ohama K, Tanimoto K. Detection of Vascular Disease Risk in Women by Panoramic Radiography. J Dent Res 2016; 82:838-43. [PMID: 14514767 DOI: 10.1177/154405910308201015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Low bone mineral density and rapid bone loss of the skeleton are associated with mortality risk from vascular diseases in post-menopausal women. Panoramic radiographic measurements are considered as indicators of skeletal bone mineral density or bone turnover. We hypothesize that such measurements may be associated with vascular disease risk in post-menopausal women. Associations of mandibular cortical shape and width on panoramic radiographs with skeletal bone mineral density and risk factors related to vascular diseases were investigated in 87 post-menopausal women. Cortical shape was associated with skeletal bone mineral density, low-density lipoprotein cholesterol, apolipoprotein B, resting heart rate, and endothelial dysfunction. Cortical width was associated with skeletal bone mineral density, low-density lipoprotein cholesterol, and apolipoprotein A1. Dentists may be able to refer women with increased risk of vascular diseases, as well as low bone mineral density, to medical professionals for further examination by panoramic findings.
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Affiliation(s)
- A Taguchi
- Department of Oral and Maxillofacial Radiology, Hiroshima University Dental Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
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Tanaka N, Ohno S, Honda K, Tanimoto K, Doi T, Ohno-Nakahara M, Tafolla E, Kapila S, Tanne K. Cyclic Mechanical Strain Regulates the PTHrP Expression in Cultured Chondrocytes via Activation of the Ca2+ Channel. J Dent Res 2016; 84:64-8. [PMID: 15615878 DOI: 10.1177/154405910508400111] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The association between mechanical stimulation and chondrocyte homeostasis has been reported. However, the participation of PTHrP (parathyroid-hormone-related protein) in the mechano-regulation of chondrocyte metabolism remains unclear. We determined whether mechanical stimulation of chondrocytes induces the expression of PTHrP and, further, whether the mechano-modulation of PTHrP is dependent on the maturational status of chondrocytes. Cyclic mechanical strain was applied to rat growth plate chondrocytes at the proliferating, matrix-forming, and hypertrophic stages at 30 cycles/min. Cyclic mechanical strain significantly increased PTHrP mRNA levels in chondrocytes at the proliferating and matrix-forming stages only. The induction of PTHrP was dependent on loading magnitude at the proliferating stage. Using specific ion channel blockers, we determined that mechano-induction of PTHrP was inhibited by nifedipine, a Ca2+ channel blocker. These results suggest that mechanical induction of PTHrP possibly provides the environment for greater chondrocyte replication and matrix formation that would subsequently affect cartilage formation.
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Affiliation(s)
- N Tanaka
- Department of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Graduate School of Biomedical Sciences, 1-2-3 Kasumi, Minami-Ku, Hiroshima 734-8553, Japan
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Shikata H, Kaku M, Kojima SI, Sumi H, Kojima ST, Yamamoto T, Yashima Y, Kawata T, Tanne K, Tanimoto K. The effect of magnetic field during freezing and thawing of rat bone marrow-derived mesenchymal stem cells. Cryobiology 2016; 73:15-9. [DOI: 10.1016/j.cryobiol.2016.06.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 06/16/2016] [Accepted: 06/21/2016] [Indexed: 12/22/2022]
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Kunimatsu R, Yoshimi Y, Hirose N, Awada T, Miyauchi M, Takata T, Li W, Zhu L, Denbesten P, Tanimoto K. The C-terminus of amelogenin enhances osteogenic differentiation of human cementoblast lineage cells. J Periodontal Res 2016; 52:218-224. [DOI: 10.1111/jre.12384] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/04/2016] [Indexed: 12/28/2022]
Affiliation(s)
- R. Kunimatsu
- Department of Orthodontics; Applied Life Sciences; Hiroshima University; Institute of Biomedical & Health Sciences; Hiroshima Japan
| | - Y. Yoshimi
- Department of Orthodontics; Applied Life Sciences; Hiroshima University; Institute of Biomedical & Health Sciences; Hiroshima Japan
| | - N. Hirose
- Department of Orthodontics; Applied Life Sciences; Hiroshima University; Institute of Biomedical & Health Sciences; Hiroshima Japan
| | - T. Awada
- Department of Orthodontics; Applied Life Sciences; Hiroshima University; Institute of Biomedical & Health Sciences; Hiroshima Japan
| | - M. Miyauchi
- Department of Oral Maxillofacial and Pathobiology; Basic Life Sciences; Hiroshima University; Institute of Biomedical & Health Sciences; Hiroshima Japan
| | - T. Takata
- Department of Oral Maxillofacial and Pathobiology; Basic Life Sciences; Hiroshima University; Institute of Biomedical & Health Sciences; Hiroshima Japan
| | - W. Li
- Department of Orofacial Sciences; University of California; San Francisco CA USA
| | - L. Zhu
- Department of Orofacial Sciences; University of California; San Francisco CA USA
| | - P.K. Denbesten
- Department of Orofacial Sciences; University of California; San Francisco CA USA
| | - K. Tanimoto
- Department of Orthodontics; Applied Life Sciences; Hiroshima University; Institute of Biomedical & Health Sciences; Hiroshima Japan
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Goto K, Ishikawa S, Honma R, Tanimoto K, Sakamoto N, Sentani K, Oue N, Teishima J, Matsubara A, Yasui W. The transcribed-ultraconserved regions in prostate and gastric cancer: DNA hypermethylation and microRNA-associated regulation. Oncogene 2015; 35:3598-606. [PMID: 26640143 DOI: 10.1038/onc.2015.445] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 09/18/2015] [Accepted: 10/05/2015] [Indexed: 12/24/2022]
Abstract
The transcribed-ultraconserved regions (T-UCRs) are a novel class of non-coding RNAs, which are absolutely conserved (100%) between the orthologous regions of the human, rat and mouse genomes. Previous studies have described that several T-UCRs show differential expressions in cancers and might be involved in cancer development. We investigated the transcriptional levels of representative 26 T-UCRs and determined the regions that were differently expressed in prostate cancer (PCa) and gastric cancer (GC). A quantitative reverse transcription-polymerase chain reaction analysis revealed the downregulation of Uc.158+A expression by a DNA methylation-associated mechanism, which was restored by 5-Aza-dC (5-aza-2'-deoxycytidine) treatment. Bisulfite genomic sequencing using cell lines and tissue samples demonstrated cancer-specific CpG hypermethylation in both GC and PCa. However, Uc.416+A was only overexpressed in GC and we identified an miR-153 binding site in the possible regulatory region of Uc.416+A using online databases. Along with a forced expression or knockdown of miR-153 in MKN-74 GC cells, the transcriptional levels of Uc.416+A were significantly disturbed. A luciferase reporter gene assay supported the direct regulation of Uc.416+A expression by miR-153. Furthermore, Uc.416+A was associated with cell growth through the regulation of IGFBP6 (insulin-like growth factor-binding protein 6) in GC. These findings suggest an oncogenic role of Uc.416+A in GC, which suggests that our approach would provide new insights into functional studies of T-UCRs in cancer biology.
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Affiliation(s)
- K Goto
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan.,Department of Urology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - S Ishikawa
- School of Medicine, Hiroshima University, Hiroshima, Japan
| | - R Honma
- School of Medicine, Hiroshima University, Hiroshima, Japan
| | - K Tanimoto
- Department of Radiation Medicine, Hiroshima University Research Institute for Radiation Biology and Medicine, Hiroshima Japan
| | - N Sakamoto
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - K Sentani
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - N Oue
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - J Teishima
- Department of Urology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - A Matsubara
- Department of Urology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - W Yasui
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
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Ogon I, Takebayashi T, Miyakawa T, Iwase T, Tanimoto K, Terashima Y, Jimbo S, Kobayashi T, Tohse N, Yamashita T. Attenuation of pain behaviour by local administration of alpha-2 adrenoceptor antagonists to dorsal root ganglia in a rat radiculopathy model. Eur J Pain 2015; 20:790-9. [DOI: 10.1002/ejp.804] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/30/2015] [Indexed: 11/10/2022]
Affiliation(s)
- I. Ogon
- Department of Orthopaedic Surgery; Sapporo Medical University School of Medicine; Japan
| | - T. Takebayashi
- Department of Orthopaedic Surgery; Sapporo Medical University School of Medicine; Japan
| | - T. Miyakawa
- Department of Orthopaedic Surgery; Sapporo Medical University School of Medicine; Japan
| | - T. Iwase
- Department of Orthopaedic Surgery; Sapporo Medical University School of Medicine; Japan
| | - K. Tanimoto
- Department of Orthopaedic Surgery; Sapporo Medical University School of Medicine; Japan
| | - Y. Terashima
- Department of Orthopaedic Surgery; Sapporo Medical University School of Medicine; Japan
| | - S. Jimbo
- Department of Orthopaedic Surgery; Sapporo Medical University School of Medicine; Japan
| | - T. Kobayashi
- Department of Cellular Physiology and Signal Transduction; Sapporo Medical University School of Medicine; Japan
| | - N. Tohse
- Department of Cellular Physiology and Signal Transduction; Sapporo Medical University School of Medicine; Japan
| | - T. Yamashita
- Department of Orthopaedic Surgery; Sapporo Medical University School of Medicine; Japan
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Mori S, Inaniwa T, Miki K, Tanimoto K, Tajiri M, Kuroiwa D, Nakao M, Shiraishi Y, Shibayama K, Tsuji H. Variation in patient position and impact on carbon-ion scanning beam distribution during prostate treatment. Br J Radiol 2015; 88:20140623. [PMID: 25950822 DOI: 10.1259/bjr.20140623] [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: 12/25/2022] Open
Abstract
OBJECTIVE We assessed the impact of changes in patient position on carbon-ion scanning beam distribution during treatment for prostate cancer. METHODS 68 patients were selected. Carbon-ion scanning dose was calculated. Two different planning target volumes (PTVs) were defined: PTV1 was the clinical target volume plus a set-up margin for the anterior/lateral sides and posterior side, while PTV2 was the same as PTV1 minus the posterior side. Total prescribed doses of 34.4 Gy [relative biological effectiveness (RBE)] and 17.2 Gy (RBE) were given to PTV1 and PTV2, respectively. To estimate the influence of geometric variations on dose distribution, the dose was recalculated on the rigidly shifted single planning CT based on two dimensional-three dimensional rigid registration of the orthogonal radiographs before and after treatment for the fraction of maximum positional changes. RESULTS Intrafractional patient positional change values averaged over all patients throughout the treatment course were less than the target registration error = 2.00 mm and angular error = 1.27°. However, these maximum positional errors did not occur in all 12 treatment fractions. Even though large positional changes occurred during irradiation in all treatment fractions, lowest dose encompassing 95% of the target (D95)-PTV1 was >98% of the prescribed dose. CONCLUSION Intrafractional patient positional changes occurred during treatment beam irradiation and degraded carbon-ion beam dose distribution. Our evaluation did not consider non-rigid deformations, however, dose distribution was still within clinically acceptable levels. ADVANCES IN KNOWLEDGE Inter- and intrafractional changes did not affect carbon-ion beam prostate treatment accuracy.
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Affiliation(s)
- S Mori
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan
| | - T Inaniwa
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan
| | - K Miki
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan
| | - K Tanimoto
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan
| | - M Tajiri
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan
| | - D Kuroiwa
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan
| | - M Nakao
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan
| | - Y Shiraishi
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan
| | - K Shibayama
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan
| | - H Tsuji
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan
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13
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Ogata Y, Shinkoda K, Takeda T, Tanimoto K, Anan M, Takahashi M. Effects of sitting postures with spine flexion prior to the lowering tasks on low back pain. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.2020] [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: 11/24/2022]
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Tokuda K, Shinkoda K, Sawada T, Tanimoto K, Ogata Y, Takeda T, Kito N, Anan M. Trunk lean gait modification reduces the coordination of body joints. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.1509] [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: 11/24/2022]
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15
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Kojima SI, Kaku M, Kawata T, Motokawa M, Sumi H, Shikata H, Abonti TH, Kojima ST, Yamamoto T, Tanne K, Tanimoto K. Cranial suture-like gap and bone regeneration after transplantation of cryopreserved MSCs by use of a programmed freezer with magnetic field in rats. Cryobiology 2015; 70:262-8. [PMID: 25858791 DOI: 10.1016/j.cryobiol.2015.04.001] [Citation(s) in RCA: 12] [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] [Received: 09/23/2014] [Revised: 03/25/2015] [Accepted: 04/01/2015] [Indexed: 12/21/2022]
Abstract
Mesenchymal stem cells (MSCs) can be used for regeneration of various organs and tissues. A previous study revealed that cryopreserved MSCs, which were frozen by a programmed freezer with a magnetic field (Cells Alive System: CAS) and cryopreserved for 7 days in a -150°C deep freezer, can maintain high survival and proliferation rates while retaining both adipogenic and osteogenic differentiation abilities. The purpose of this study was to examine MSC viability and tissue regenerative ability after long-term cryopreservation using a CAS freezer. MSCs were isolated from rat femora bone marrow and cryopreserved in a -150°C deep freezer (CAS group) or directly cryopreserved in a deep freezer (Direct group). After 3 years, the cells were thawed and the number of viable cells was counted. Cell proliferation was also examined after 14 days in culture. For histological examination, forty 4-week-old Fischer 344 male rats received bone and sagittal suture defects with a diameter of 6.0mm, and MSCs (CAS or Direct group) cryopreserved for 1 year were grafted with membranes. Non-cryopreserved MSCs (Control group) were transplanted to an additional twenty rats. The rats were sacrificed at 4, 8, 16, and 24 weeks after surgery. The parietal bones, including the sagittal suture, were observed under a light microscope and the extent of bone regeneration was measured. Our results indicate that MSCs survival and proliferation rates were significantly higher in the CAS group than in the Direct group. In the Control and CAS groups, a large amount of new bone formation and a suture-like gap was identified 24 weeks after transplantation, whereas only a small amount of new bone formation was observed in the Direct group. These results suggest that the CAS freezer is amenable to long-term cryopreservation of MSCs, which can be applied to the regeneration of various tissues, including bone tissue with suture-like gap formation.
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Affiliation(s)
- S-I Kojima
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Japan.
| | - M Kaku
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Japan
| | - T Kawata
- Department of Orthodontics, Kanagawa Dental University, Japan
| | - M Motokawa
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Japan
| | - H Sumi
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Japan
| | - H Shikata
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Japan
| | - T H Abonti
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Japan
| | - S-T Kojima
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Japan
| | - T Yamamoto
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Japan
| | - K Tanne
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Japan
| | - K Tanimoto
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Japan
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Nishiyama T, Katsumata Y, Inagawa K, Kimura T, Nishiyama N, Fukumoto K, Tanimoto Y, Aizawa Y, Tanimoto K, Fukuda K, Takatsuki S. Visualization of the left atrial appendage by phased-array intracardiac echocardiography from the pulmonary artery in patients with atrial fibrillation. Europace 2015; 17:546-51. [DOI: 10.1093/europace/euu383] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 12/07/2014] [Indexed: 12/21/2022] Open
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17
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Asakawa-Tanne Y, Su S, Kunimatsu R, Hirose N, Mitsuyoshi T, Okamoto Y, Tanaka E, Tanne K, Tanimoto K. Effects of enzymatic degradation after loading in temporomandibular joint. J Dent Res 2015; 94:337-343. [PMID: 25503611 PMCID: PMC4438732 DOI: 10.1177/0022034514560588] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [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] [Indexed: 09/12/2023] Open
Abstract
Synovial fluid of the joint decreases friction between the cartilage surfaces and reduces cartilage wear during articulation. Characteristic changes of synovial fluid have been shown in patients with osteoarthritis (OA) in the temporomandibular joint (TMJ). OA is generally considered to be induced by excessive mechanical stress. However, whether the changes in synovial fluid precede the mechanical overloading or vice versa remains unclear. In the present study, our purpose was to examine if the breakdown of joint lubrication affects the frictional properties of mandibular condylar cartilage and leads to subsequent degenerative changes in TMJ. We measured the frictional coefficient in porcine TMJ by a pendulum device after digestion with hyaluronidase (HAase) or trypsin. Gene expressions of interleukin-1β (IL-1β), cyclooxygenase-2 (COX-2), matrix metalloproteinases (MMPs), type II collagen, and histology were examined after prolonged cyclic loading by an active pendulum system. The results showed that the frictional coefficient increased significantly after HAase (35%) or trypsin (74%) treatment. Gene expression of IL-1β, COX-2, and MMPs-1, -3, and -9 increased significantly in enzyme-treated TMJs after cyclic loading. The increase in the trypsin-treated group was greater than that in the HAase-treated group. Type II collagen expression was reduced in both enzyme-treated groups. Histology revealed surface fibrillation and increased MMP-1 in the trypsin-treated group, as well as increased IL-1β in both enzyme-treated groups after cyclic loading. The findings demonstrated that the compromised lubrication in TMJ is associated with altered frictional properties and surface wear of condylar cartilage, accompanied by release of pro-inflammatory and matrix degradation mediators under mechanical loading.
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Affiliation(s)
- Y Asakawa-Tanne
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Minami-ku, Hiroshima, Japan
| | - S Su
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Minami-ku, Hiroshima, Japan
| | - R Kunimatsu
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Minami-ku, Hiroshima, Japan
| | - N Hirose
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Minami-ku, Hiroshima, Japan
| | - T Mitsuyoshi
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Minami-ku, Hiroshima, Japan
| | - Y Okamoto
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Minami-ku, Hiroshima, Japan
| | - E Tanaka
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Health Biosciences, The University of Tokushima Graduate School, Kuramoto-cho, Tokushima, Japan
| | - K Tanne
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Minami-ku, Hiroshima, Japan
| | - K Tanimoto
- Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Minami-ku, Hiroshima, Japan
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Zhu L, Liu H, Witkowska HE, Huang Y, Tanimoto K, Li W. Preferential and selective degradation and removal of amelogenin adsorbed on hydroxyapatites by MMP20 and KLK4 in vitro. Front Physiol 2014; 5:268. [PMID: 25104939 PMCID: PMC4109566 DOI: 10.3389/fphys.2014.00268] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [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: 05/28/2014] [Accepted: 06/26/2014] [Indexed: 11/23/2022] Open
Abstract
The hardest tooth enamel tissue develops from a soft layer of protein-rich matrix, predominated by amelogenin that is secreted by epithelial ameloblasts in the secretory stage of tooth enamel development. During enamel formation, a well-controlled progressive removal of matrix proteins by resident proteases, Matrix metalloproteinase 20 (MMP20), and kallikrein 4 (KLK4), will provide space for the apatite crystals to grow. To better understand the role of amelogenin degradation in enamel biomineralization, the present study was conducted to investigate how the adsorption of amelogenin to hydroxyapatite (HAP) crystals affects its degradation by enamel proteinases, MMP20 and KLK4. Equal quantities of amelogenins confirmed by protein assays before digestions, either adsorbed to HAP or in solution, were incubated with MMP20 or KLK4. The digested samples collected at different time points were analyzed by spectrophotometry, SDS-PAGE, high performance liquid chromatography (HPLC), and LC-MALDI MS/MS. We found that majority of amelogenin adsorbed on HAP was released into the surrounding solution by enzymatic processing (88% for MMP20 and 98% for KLK4). The results show that as compared with amelogenin in solution, the HAP-bound amelogenin was hydrolyzed by both MMP20 and KLK4 at significantly higher rates. Using LC-MALDI MS/MS, more accessible cleavage sites and hydrolytic fragments from MMP20/KLK4 digestion were identified for the amelogenin adsorbed on HAP crystals as compared to the amelogenin in solution. These results suggest that the adsorption of amelogenin to HAP results in their preferential and selective degradation and removal from HAP by MMP20 and KLK4 in vitro. Based on these findings, a new degradation model related to enamel crystal growth is proposed.
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Affiliation(s)
- Li Zhu
- Department of Orofacial Sciences, School of Dentistry, University of California, San Francisco San Francisco, CA, USA
| | - Haichuan Liu
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco San Francisco, CA, USA
| | - H Ewa Witkowska
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco San Francisco, CA, USA
| | - Yulei Huang
- Department of Oral Medicine, Guanghua School of Stomatology, Sun Yat-sen University Guangdong, China
| | - Kataro Tanimoto
- Departments of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Graduate School of Biomedical Sciences Hiroshima, Japan
| | - Wu Li
- Department of Orofacial Sciences, School of Dentistry, University of California, San Francisco San Francisco, CA, USA
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Su SC, Tanimoto K, Tanne Y, Kunimatsu R, Hirose N, Mitsuyoshi T, Okamoto Y, Tanne K. Celecoxib exerts protective effects on extracellular matrix metabolism of mandibular condylar chondrocytes under excessive mechanical stress. Osteoarthritis Cartilage 2014; 22:845-51. [PMID: 24721459 DOI: 10.1016/j.joca.2014.03.011] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [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: 06/11/2013] [Revised: 03/03/2014] [Accepted: 03/14/2014] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Excessive mechanical stress is considered a major cause of temporomandibular joint osteoarthritis (TMJ-OA). High magnitude cyclic tensile strain (CTS) up-regulates pro-inflammatory cytokines and matrix metalloproteinases (MMPs) in chondrocytes, while selective cyclooxygenase (COX)-2 inhibition has been shown to be beneficial to cytokine-induced cartilage damage. However, the effect of selective COX-2 inhibitors on mechanically stimulated chondrocytes remains unclear. This study evaluated the effect of celecoxib, a selective COX-2 inhibitor, on extracellular matrix (ECM) metabolism of mandibular condylar chondrocytes under CTS. METHODS Porcine mandibular chondrocytes were subjected to CTS of 0.5 Hz, 10% elongation with celecoxib for 24 h. The gene expressions of COX-2, MMPs, aggrecanase (ADAMTS), type II collagen and aggrecan were examined by real-time PCR. Also, prostaglandin E2 (PGE2) concentrations were determined using enzyme immunoassay kit. The levels of MMP and transcription factor NF-κB were measured by western blot while MMP activity was determined by casein zymography. RESULTS The presence of celecoxib normalized the release of PGE2 and diminished the CTS-induced COX-2, MMP-1, MMP-3, MMP-9 and ADAMTS-5 gene expressions while recovered the downregulated type II collagen and aggrecan gene expressions. Concurrently, celecoxib showed inhibition of NF-κB and suppression of MMP production and activity. CONCLUSIONS Celecoxib exerts protective effects on mandibular condylar chondrocytes under CTS stimulation by diminishing degradation and restoring synthesis of ECM.
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Affiliation(s)
- S C Su
- Department of Orthodontics, Division of Applied Biosciences, Hiroshima University Graduate School of Biomedical and Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - K Tanimoto
- Department of Orthodontics, Division of Applied Biosciences, Hiroshima University Graduate School of Biomedical and Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
| | - Y Tanne
- Department of Orthodontics, Division of Applied Biosciences, Hiroshima University Graduate School of Biomedical and Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - R Kunimatsu
- Department of Orthodontics, Division of Applied Biosciences, Hiroshima University Graduate School of Biomedical and Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - N Hirose
- Department of Orthodontics, Division of Applied Biosciences, Hiroshima University Graduate School of Biomedical and Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - T Mitsuyoshi
- Department of Orthodontics, Division of Applied Biosciences, Hiroshima University Graduate School of Biomedical and Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Y Okamoto
- Department of Orthodontics, Division of Applied Biosciences, Hiroshima University Graduate School of Biomedical and Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - K Tanne
- Department of Orthodontics, Division of Applied Biosciences, Hiroshima University Graduate School of Biomedical and Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
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Goto T, Tanimoto K, Ueda K, Nakano M, Uoi M, Misumi N, Okamura S, Nishino T. A Trimethoprim-Sulfamethoxazole May Regulate an Extension of the Treatment Interval in Patients Receiving Chemotherapy. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt459.18] [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: 11/12/2022] Open
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Zaman MU, Nakamoto T, Tanimoto K. A retrospective study of digital subtraction technique to detect sclerotic changes in alveolar bone on intraoral radiographs of bisphosphonate-treated patients. Dentomaxillofac Radiol 2013; 42:20130242. [PMID: 24170801 DOI: 10.1259/dmfr.20130242] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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: 11/05/2022] Open
Abstract
OBJECTIVES Several reports have suggested that sclerotic changes in cancellous bone of the jaw and thickening of the lamina dura are characteristic radiographic changes of an early silent stage of bisphosphonate (BP)-related osteonecrosis of the jaw. No quantitative evaluation has been reported to support this hypothesis. Emago(®) software (Oral Diagnostic Systems, Amsterdam, Netherlands) can perform digital subtraction on intraoral radiographs even if they were obtained by non-standardized radiography, provided the dimensional error is within a certain limit. The purpose of this study was to evaluate whether sclerotic changes of alveolar bone or thickening of lamina dura in patients using BP can be detected using the subtraction function of Emago. METHODS The authors selected 46 pairs of intraoral radiographs of the mandibular molar area in dental patients. All radiographs were obtained at intervals of 6 months or more. Among the 46 pairs, 7 pairs were from patients who were being treated with BP (study subjects), and 39 pairs were from patients who had not been using BP (controls). All pairs of radiographs underwent digital subtraction by Emago. The number of pixels of the sclerotic areas was counted and compared between subjects and controls. RESULTS The sclerotic changes were significantly distinguishable in two of the seven subjects (28.6%) using BP. CONCLUSIONS Digital subtraction function of Emago was able to detect sclerotic changes in alveolar bone. Therefore, it is suggested that the subtraction function of Emago is a useful tool for quantitatively detecting sclerotic changes that are observed at an early, silent stage of BP-related osteonecrosis of the jaw.
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Affiliation(s)
- M U Zaman
- Department of Oral and Maxillofacial Radiology, Division of Medical Intelligence and Informatics, Graduate School of Biomedical Science, Hiroshima University, Hiroshima, Japan
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Aizawa Y, Takatsuki S, Inagawa K, Katsumata Y, Nishiyama T, Kimura T, Nishiyama N, Sato Y, Fukumoto K, Tanimoto Y, Tanimoto K, Fukuda K. Narrow QRS tachycardia. Mechanism behind changes in conduction. Herz 2013; 39:276-8. [PMID: 23483224 DOI: 10.1007/s00059-013-3784-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 02/15/2013] [Accepted: 02/17/2013] [Indexed: 11/25/2022]
Affiliation(s)
- Y Aizawa
- Division of Cardiology, Keio University School of Medicine, 35 Shinanomachi, 160-8582, Shinjuku-ku, Tokyo, Japan,
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Zaman MU, Nakamoto T, Tanimoto K. A retrospective study of digital subtraction technique to detect sclerotic changes in alveolar bone on intraoral radiographs of bisphosphonate-treated patients. Dentomaxillofac Radiol 2013; 42:20130242. [PMID: 24404602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
OBJECTIVES Several reports have suggested that sclerotic changes in cancellous bone of the jaw and thickening of the lamina dura are characteristic radiographic changes of an early silent stage of bisphosphonate (BP)-related osteonecrosis of the jaw. No quantitative evaluation has been reported to support this hypothesis. Emago® software (Oral Diagnostic Systems, Amsterdam, Netherlands) can perform digital subtraction on intraoral radiographs even if they were obtained by non-standardized radiography, provided the dimensional error is within a certain limit. The purpose of this study was to evaluate whether sclerotic changes of alveolar bone or thickening of lamina dura in patients using BP can be detected using the subtraction function of Emago. METHODS The authors selected 46 pairs of intraoral radiographs of the mandibular molar area in dental patients. All radiographs were obtained at intervals of 6 months or more. Among the 46 pairs, 7 pairs were from patients who were being treated with BP (study subjects), and 39 pairs were from patients who had not been using BP (controls). All pairs of radiographs underwent digital subtraction by Emago. The number of pixels of the sclerotic areas was counted and compared between subjects and controls. RESULTS The sclerotic changes were significantly distinguishable in two of the seven subjects (28.6%) using BP. CONCLUSIONS Digital subtraction function of Emago was able to detect sclerotic changes in alveolar bone. Therefore, it is suggested that the subtraction function of Emago is a useful tool for quantitatively detecting sclerotic changes that are observed at an early, silent stage of BP-related osteonecrosis of the jaw.
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Badagliacca R, Reali M, Vizza C, Poscia R, Pezzuto B, Gambardella C, Papa S, Mezzapesa M, Nocioni M, Fedele F, Freed B, Bhave N, Tsang W, Gomberg-Maitland M, Mor-Avi V, Patel A, Lang RM, Liel-Cohen N, Yaacobi M, Guterman H, Jurzak P, Ternacle J, Gallet R, Bensaid A, Kloeckner M, Monin JL, Gueret P, Dubois-Rande JL, Lim P, Otsuka T, Suzuki M, Yoshikawa H, Hashimoto G, Ishikawa Y, Osaki T, Masai H, Ono T, Yamamoto M, Sugi K, Satendra M, Sargento L, Sousa C, Arsenio A, Lousada N, Palma Reis R, Wang S, Lam Y, Liu M, Fang F, Shang Q, Luo X, Wang J, Sun J, Sanderson J, Yu C, De Marchi S, Hopp E, Urheim S, Hervold A, Murbrach K, Massey R, Remme E, Hol P, Aakhus S, Bouzas Mosquera A, Peteiro J, Broullon F, Garcia NA, Rodriguez Garrido J, Martinez Ruiz D, Yanez Wonenburger J, Bouzas Zubeldia B, Fabregas Casal R, Castro Beiras A, Le Tourneau T, Sportouch C, Foucher C, Delasalle B, Rosso J, Neuder Y, Trochu J, Roncalli J, Lemarchand P, Manrique A, Sharif D, Sharif-Rasslan A, Shahla C, Khalil A, Rosenschein U, Monti L, Tramarin M, Calcagnino M, Lisignoli V, Nardi B, Balzarini L, Khalatbari A, Mills J, Chenzbraun A, Theron A, Morera P, Resseguier N, Thuny F, Riberi A, Giorgi R, Collart F, Habib G, Avierinos J, Liu D, Hu K, Niemann M, Herrmann S, Gaudron P, Voelker W, Ertl G, Bijnens B, Weidemann F, Lenders GD, Bosmans JM, Van Herck PL, Rodrigus IE, Claeys MJ, Vrints CJ, Paelinck BP, Veronesi F, Fusini L, Tamborini G, Gripari P, Maffessanti F, Mirea O, Alamanni F, Pepi M, Caiani E, Frikha Z, Zairi I, Saib W, Fennira S, Ben Moussa F, Kammoun S, Mrabet K, Ben Yaala A, Said L, Ghannouchi M, Carlomagno G, Ascione L, Sordelli C, Iengo R, Severino S, D'andrea A, Calabro' R, Caso P, Mizia M, Mizia-Stec K, Sikora-Puz A, Gieszczyk-Strozik K, Chmiel A, Haberka M, Hudziak D, Jasinski M, Gasior Z, Wos S, Biaggi P, Felix C, Gruner C, Hohlfeld S, Herzog B, Gaemperli O, Gruenenfelder J, Corti R, Tanner F, Bettex D, Kovalova S, Necas J, Dominguez Rodriguez F, Monivas V, Mingo S, Garcia-Lunar I, Garcia-Pavia P, Gonzalez-Mirelis J, Zegri I, Cavero M, Jeon HK, Lee D, Youn H, Shin H, Yoon J, Chung H, Choi E, Kim J, Min P, Lee B, Yoon Y, Hong B, Kwon H, Rim S, Petronilli V, Cimino S, De Luca L, Cicogna F, Arcari L, Francone M, Iacoboni C, Agati L, Halmai L, Atkinson P, Kardos A, Bogle R, Meimoun P, Flahaut G, Charles V, Villain Y, Clerc J, Germain A, Elmkies F, Zemir H, Luycx-Bore A, Kim K, Song J, Jeong H, Yoon H, Ahn Y, Jeong M, Cho J, Park J, Kang J, Tolba OA, El-Shanshory MR, El-Shitany NAEA, El-Hawary ES, Elkilany GN, Tolba OA, El-Shanshory MR, El-Shitany AEA, El-Hawary EES, Nagib Elkilany GE, Costanzo L, Buccheri S, Monte IP, Curatolo G, Crapanzano P, Di Pino L, Rodolico M, Blundo A, Leggio S, Tamburino C, Rees E, Hocking R, Dunstan F, Lewis M, Tunstall K, Rees DA, Halcox JP, Fraser AG, Rodrigues A, Guimaraes L, Guimaraes J, Monaco C, Cordovil A, Lira E, Vieira M, Fischer C, Nomura C, Morhy S, Bruno R, Cogo A, Sharma R, Bartesaghi M, Pomidori L, Basnyat B, Taddei S, Picano E, Sicari R, Pratali L, Satendra M, Sargento L, Sousa C, Lousada N, Palma Reis R, Zakhama L, Sioua S, Naffati S, Marouen A, Boussabah E, Kadour R, Thameur M, Benyoussef S, Vanoli D, Wiklund U, Henein M, Naslund U, Lindqvist P, Palinsky M, Petrovicova J, Pirscova M, Korpi K, Blafield H, Suomi H, Linden P, Valtonen M, Jarvinen V, Laine M, Loimaala A, Kaldararova M, Kantorova A, Vrsanska V, Tittel P, Hraska V, Masura J, Simkova I, Attenhofer Jost C, Zimmermann C, Greutmann M, Dave H, Valsangiacomo Buechel E, Pretre R, Mueller C, Seifert B, Kretschmar O, Weber R, Carro A, Teixido G, Rodriguez-Palomares J, Gutierrez L, Maldonado G, Paucca E, Gonzalez-Alujas T, Evangelista A, Al Akhfash A, Al Mesned D, Maan Hasson D, Al Harbi B M, Cruz C, Pinho T, Lebreiro A, Silva Cardoso J, Julia Maciel M, Kalimanovska-Ostric D, Nastasovic T, Deljanin-Ilic M, Milakovic B, Dostanic M, Stosic M, Lam YY, Fang F, Yu C, Bobbo M, Leonelli V, Piazza R, Leiballi E, Pecoraro R, Cinello M, Mimo R, Cervesato E, Nicolosi GL, Cruz C, Pinho T, Lebreiro A, Silva Cardoso J, Julia Maciel M, Moral Torres S, Evangelista A, Gonzalez-Alujas M, Rodriguez-Palomares J, Teixido G, Gutierrez L, Cuellar H, Carro A, Maldonado G, Garcia-Dorado D, Kocabay G, Dal Bianco L, Muraru D, Peluso D, Segafredo B, Iliceto S, Badano L, Schiano Lomoriello V, Santoro A, Esposito R, Ippolito R, De Palma D, Schiattarella P, Muscariello R, Galderisi M, Teixido Tura G, Redheuil A, Rodriguez-Palomares J, Gutierrez L, Sanchez V, Forteza A, Lima J, Garcia-Dorado D, Evangelista A, Moral Torres S, Evangelista A, Gonzalez-Alujas M, Rodriguez-Palomares J, Teixido G, Gutierrez L, Cuellar H, Carro A, Maldonado G, Garcia-Dorado D, Mihalcea D, Florescu M, Suran B, Enescu O, Mincu R, Patrascu N, Serbanoiu I, Margulescu A, Vinereanu D, Teixido Tura G, Rodriguez-Palomares J, Gutierrez L, Gonzalez-Alujas T, Carro A, Thomas M, Garcia-Dorado D, Evangelista A, Tosello F, Milan A, Magnino C, Leone D, Chiarlo M, Bruno G, Losano I, Burrello J, Fulcheri C, Veglio F, Styczynski G, Szmigielski CA, Kaczynska A, Kuch-Wocial A, Jansen R, Kracht P, Kluin J, Tietge W, Cramer M, Chamuleau S, Zito C, Tripepi S, Cusma-Piccione M, Di Bella G, Mohammed M, Oreto L, Manganaro R, D'angelo M, Pizzino F, Carerj S, Arapi S, Tsounis D, Matzraki V, Kaplanis I, Perpinia A, Varoudi M, Mpitsios G, Lazaros G, Karavidas A, Pyrgakis V, Mornos C, Ionac A, Cozma D, Mornos A, Dragulescu D, Petrescu L, Pescariu S, Lupinek P, Sramko M, Kubanek M, Kautznerova D, Tintera J, Lanska V, Kadrabulatova S, Pavlukova E, Tarasov D, Karpov R, Sveric K, Forkmann M, Richter U, Wunderlich C, Strasser R, Grapsa J, Dawson D, Zimbarra Cabrita I, Punjabi P, Nihoyannopoulos P, Kovacs A, Apor A, Nagy A, Vago H, Toth A, Becker D, Merkely B, Ranjbar S, Karvandi M, Hassantash S, Yoshikawa H, Suzuki M, Kusunose Y, Hashimoto G, Otsuka T, Nakamura M, Sugi K, De Knegt M, Biering-Sorensen T, Sogaard P, Sivertsen J, Jensen J, Mogelvang R, Montserrat S, Gabrielli L, Borras R, Bijnens B, Castella M, Berruezo A, Mont L, Brugada J, Sitges M, Tarr A, Stoebe S, Pfeiffer D, Hagendorff A, Ternacle J, Jurzak P, Gallet R, Champagne S, Teiger E, Monin JL, Gueret P, Dubois-Rande JL, Lim P, Monney P, Jeanrenaud X, Monivas Palomero V, Mingo Santos S, Garcia Lunar I, Beltran Correas P, Gonzalez Lopez E, Sanchez Garcia M, Gonzalez Mirelis J, Cavero Gibanel M, Gomez Bueno M, Segovia Cubero J, Haarman M, Van Den Bosch A, Domburg R, Mcghie J, Roos-Hesselink J, Geleijnse M, Yanikoglu A, Altekin E, Kucuk M, Karakas S, Ozel D, Yilmaz H, Demir I, Tsuruta H, Iwanaga S, Sato T, Miyoshi S, Nishiyama N, Aizawa Y, Tanimoto K, Murata M, Takatsuki S, Fukuda K, Carrilho-Ferreira P, Cortez-Dias N, Silva D, Jorge C, Goncalves S, Santos I, Sargento L, Marques P, Carpinteiro L, Sousa J, Schubert U, Kockova R, Tintera J, Kautznerova D, Cerna D, Sedlacek K, Kryze L, Sikula V, Segetova M, Kautzner J, Iwaki T, Dores H, Goncalves P, Sousa P, Carvalho M, Marques H, Machado F, Gaspar A, Aleixo A, Carmo M, Roquette J, Lagopati N, Sotiropoulos M, Baka I, Ploussi A, Lyra Georgosopoulou M, Miglioranza M, Gargani L, Sant'anna R, Rover M, Mantovani A, Kalil R, Sicari R, Picano E, Leiria T, Minarik T, Taborsky M, Fedorco M, Novak P, Ledakowicz-Polak A, Polak L, Zielinska M, Zhong L, Chin C, Lau Y, Sim L, Chua T, Tan B, Tan R. Poster session: Dobutamine stress echo. Eur Heart J Cardiovasc Imaging 2012. [DOI: 10.1093/ehjci/jes257] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Iwase T, Takebayashi T, Tanimoto K, Terashima Y, Miyakawa T, Kobayashi T, Tohse N, Yamashita T. Sympathectomy attenuates excitability of dorsal root ganglion neurons and pain behaviour in a lumbar radiculopathy model. Bone Joint Res 2012; 1:198-204. [PMID: 23610691 PMCID: PMC3626214 DOI: 10.1302/2046-3758.19.2000073] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 07/03/2012] [Indexed: 01/19/2023] Open
Abstract
Objectives In order to elucidate the influence of sympathetic nerves on
lumbar radiculopathy, we investigated whether sympathectomy attenuated
pain behaviour and altered the electrical properties of the dorsal
root ganglion (DRG) neurons in a rat model of lumbar root constriction. Methods Sprague-Dawley rats were divided into three experimental groups.
In the root constriction group, the left L5 spinal nerve root was
ligated proximal to the DRG as a lumbar radiculopathy model. In
the root constriction + sympathectomy group, sympathectomy was performed
after the root constriction procedure. In the control group, no
procedures were performed. In order to evaluate the pain relief
effect of sympathectomy, behavioural analysis using mechanical and
thermal stimulation was performed. In order to evaluate the excitability
of the DRG neurons, we recorded action potentials of the isolated
single DRG neuron by the whole-cell patch-clamp method. Results In behavioural analysis, sympathectomy attenuated the mechanical
allodynia and thermal hyperalgesia caused by lumbar root constriction.
In electrophysiological analysis, single isolated DRG neurons with
root constriction exhibited lower threshold current, more depolarised
resting membrane potential, prolonged action potential duration,
and more depolarisation frequency. These hyperexcitable alterations
caused by root constriction were significantly attenuated in rats
treated with surgical sympathectomy. Conclusion The present results suggest that sympathectomy attenuates lumbar
radicular pain resulting from root constriction by altering the
electrical property of the DRG neuron itself. Thus, the sympathetic
nervous system was closely associated with lumbar radicular pain,
and suppressing the activity of the sympathetic nervous system may therefore
lead to pain relief.
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Affiliation(s)
- T Iwase
- Sapporo Medical University School of Medicine, Department of Orthopaedic Surgery, South 1, West 16, Chuo-ku, Sapporo 060-8543, Japan
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Tanimoto K, Huang YC, Tanne Y, Kunimatsu R, Michida M, Yoshioka M, Ozaki N, Sasamoto T, Yoshimi Y, Kato Y, Tanne K. Amelogenin enhances the osteogenic differentiation of mesenchymal stem cells derived from bone marrow. Cells Tissues Organs 2012; 196:411-9. [PMID: 22653431 DOI: 10.1159/000335912] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2011] [Indexed: 02/03/2023] Open
Abstract
Amelogenins are the major constituent of developing extracellular enamel matrix proteins and are understood to have an exclusively epithelial origin. Recent studies have demonstrated that amelogenins can be detected in other tissues, including bone marrow mesenchymal stem cells (MSCs), but the role of amelogenins in MSCs remains unclear. The purpose of this study was to examine the effect of recombinant human full-length amelogenin (rh174) on the osteogenic differentiation of cultured human MSCs. MSCs isolated from human bone marrow were cultured in osteoblastic differentiation medium with 0, 10 or 100 ng/ml rh174. The mRNA levels of bone markers were examined by real-time PCR analysis. Alkaline phosphatase (ALP) activity and calcium concentration were determined. Mineralization was evaluated by alizarin red staining. The mRNA levels of ALP, type I collagen, osteopontin and bone sialoprotein in the MSCs treated with rh174 became significantly higher than those in non-treated controls. Treatment of MSCs with rh174 also enhanced ALP activity and calcium concentration, resulting in enhanced mineralization, as denoted by high intensity of alizarin red staining. In conclusion, the present study showed that rh174 enhances the mineralization accompanied by the upregulation of bone markers in human bone marrow MSCs during osteogenic differentiation, suggesting a certain role of amelogenin in the modulation of osteogenic differentiation of MSCs.
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Affiliation(s)
- K Tanimoto
- Department of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan.
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Suda N, Hattori M, Kosaki K, Banshodani A, Kozai K, Tanimoto K, Moriyama K. Correlation between genotype and supernumerary tooth formation in cleidocranial dysplasia. Orthod Craniofac Res 2011; 13:197-202. [PMID: 21040462 DOI: 10.1111/j.1601-6343.2010.01495.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Cleidocranial dysplasia (CCD, MIM#119600), for which the responsible gene is RUNX2, is a genetic disorder characterized by hypoplasia or aplasia of the clavicles, patent fontanelles, and a short stature. Supernumerary teeth and delayed eruption and impaction of permanent teeth are frequently associated with CCD. Our previous study reported wide intrafamilial variation in supernumerary tooth formation associated with a mutation in the RUNT-domain of RUNX2, suggesting a low correlation between the genotype and supernumerary tooth formation. To further clarify this point, a more precise evaluation was performed. DESIGN Gene mutational analysis of nine Japanese individuals with CCD was performed. Dental and skeletal characteristics were examined based on patient examinations and radiographs. RESULTS Four different gene mutations, including one novel mutation in RUNX2 gene (NM_001024630), were identified. Among them, four individuals had the R225Q mutation, three siblings had the P224S mutation, and the other two individuals had different frame-shift mutations. Wide variations in supernumerary tooth formation were observed in individuals with identical gene mutations, and discordance was seen between monozygotic twins. Asymmetric supernumerary tooth formation was noted in five out of the nine individuals. CONCLUSION Individuals with identical gene mutations showed a wide variation in the supernumerary tooth formation. Not only the genotype but also environmental factors and a complex system including epigenetics and copy number variation might regulate supernumerary tooth formation in CCD.
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Affiliation(s)
- N Suda
- Maxillofacial Orthognathics, Department of Maxillofacial Reconstruction and Function, Division of Maxillofacial/Neck Reconstruction, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, Japan.
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Abstract
OBJECTIVE The aim was to evaluate the possibility of radiographic prediction of the prognosis of simple bone cysts (SBCs) of the jaws. METHODS The relationship between the radiographic findings and treatment outcome (healing or recurrence) was investigated in 31 cases treated in the authors' hospital and 108 published cases. RESULTS In 17 of our 31 cases, the lesions had radiographic findings of a preserved lamina dura adjacent to the lesion, with a smooth margin, and no or smooth bone expansion, and all of them healed after surgery. In the other 14 cases, there was resorption of the lamina dura, a scalloped margin, nodular bone expansion, root resorption, a sclerotic mass or multiple cavities, and nine cases of recurrence. Although there was incomplete information in the published case studies, similar results were noted. CONCLUSIONS It was concluded that there was a relationship between the radiographic features of the lesions and prognosis. Radiographic examination should be used not only for discovering and diagnosing the lesions, but also for predicting possible prognosis.
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Affiliation(s)
- Y Suei
- Department of Oral and Maxillofacial Radiology, Hiroshima University Hospital, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
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Takemoto H, Murata K, Tomita N, Fukunaga M, Watanabe M, Ohue M, Ikeda R, Tanimoto K, Hiyama K, Nishiyama M. Pharmacogenomic analysis for prediction of individual response to mFOLFOX6 in colorectal cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e13500] [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: 11/20/2022] Open
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Kamiya T, Tanimoto K, Tanne Y, Lin YY, Kunimatsu R, Yoshioka M, Tanaka N, Tanaka E, Tanne K. Effects of mechanical stimuli on the synthesis of superficial zone protein in chondrocytes. J Biomed Mater Res A 2010; 92:801-5. [PMID: 19280634 DOI: 10.1002/jbm.a.32295] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Superficial zone protein (SZP) has been demonstrated to contribute to the boundary lubrication in synovial joints. This study was designed to clarify the modulation of SZP expression by mechanical stress in articular chondrocytes. Cyclic tensile strains of 7 and 21% cell elongation were applied to cultured chondrocytes obtained from porcine mandibular condylar cartilage. The mRNA levels of SZP, IL-1 beta, and TGF-beta1 were examined by a quantitative real-time PCR analysis. Protein level of SZP was examined by Western blotting. The SZP mRNA level was significantly upregulated after 12, 24, and 48 h by 7% elongation. Although SZP mRNA level was upregulated by 21% elongation after 12 h, it decreased to a lower level than the control after 48 h. The TGF-beta1 mRNA level exhibited an almost similar change to SZP. The IL-1 beta mRNA level was not changed markedly by 7% elongation. However, the IL-1 beta mRNA level was significantly increased by a 12-h application of 21% elongation. Western blot analysis revealed that the SZP expression was increased by 7% elongation, but decreased remarkably by 21% elongation. It is suggested from these findings that the SZP expression level in the chondrocytes is enhanced by optimal mechanical stimuli, but inhibited by excessive loading partly affected by TGF-beta1 and IL-1 beta, leading to the deterioration of joint lubrication.
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Affiliation(s)
- T Kamiya
- Department of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Graduate School of Biomedical Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
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Nishio C, Tanimoto K, Hirose M, Horiuchi S, Kuroda S, Tanne K, Tanaka E. Stress analysis in the mandibular condyle during prolonged clenching: a theoretical approach with the finite element method. Proc Inst Mech Eng H 2009; 223:739-48. [PMID: 19743639 DOI: 10.1243/09544119jeim485] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Parafunctional habits, such as bruxism and prolonged clenching, have been associated with functional overloading in the temporomandibular joint (TMJ), which may result in internal derangement and osteoarthrosis of the TMJ. In this study, the distributions of stress on the mandibular condylar surface during prolonged clenching were examined with TMJ mathematical models. Finite element models were developed on the basis of magnetic resonance images from two subjects with or without anterior disc displacement of the TMJ. Masticatory muscle forces were used as a loading condition for stress analysis during a 10 min clenching. In the asymptomatic model, the stress values in the anterior area (0.100 MPa) and lateral area (0.074 MPa) were relatively high among the five areas at 10 min. In the middle and posterior areas, stress relaxation occurred during the first 2 min. In contrast, the stress value in the lateral area was markedly lower (0.020 MPa) than in other areas in the symptomatic model at 10 min. The largest stress (0.050 MPa) was located in the posterior area. All except the anterior area revealed an increase in stress during the first 2 min. The present result indicates that the displacement of the disc could affect the stress distribution on the condylar articular surface during prolonged clenching, especially in the posterior area, probably leading to the cartilage breakdown on the condylar articular surface.
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Affiliation(s)
- C Nishio
- Department of Orthodontics and Craniofacial Development Biology, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan
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Takemoto H, Tomita N, Murata K, Fukunaga M, Okamura S, Ohue M, Ishida H, Tanimoto K, Hiyama K, Nishiyama M. Optimal patient selection for CPT-11 chemotherapy in colorectal cancer: Quantitative prediction of tumor response and overall survival using expression data of novel marker genes. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e14529] [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: 11/20/2022] Open
Abstract
e14529 Background: Unlike the toxicity, none of the critical prediction markers of CPT-11 efficacy has been validated to date. With a hypothesis that expression analysis of a set of the key drug sensitivity genes could allow us to predict the therapeutic response, we identified potent marker genes for CPT-11 in in vitro, conducted this prospective study attempting to develop a prediction formula of efficacy using the expression data (2006 ASCO, 2006 ESMO), and demonstrated the latest prediction formula of the best tumor response (BTR), time to treatment failure (TTP), and the overall survival after CPT-11 chemotherapy (OS). Methods: Seven genes identified as possible marker genes for CPT-11 (SN-38)- AMD1, CTSC, EIF1AX, FLJ13089 , DDX54, PTPN2, and TBX3-, and 5 other possible marker genes (ABCG2, CYP3A4, MGMT, POR, and TOP2A) that had already been known as drug sensitivity determinants and selected by our in vitro screening process, were studied. CPT-11 was intravenously administered on Days 1, 8, and 15, every 4 weeks in chemo-naive patients with stage IV colorectal cancer after palliative operation. Tumor samples were collected at surgery and tumor response was evaluated by RECIST. Results: All of the 44 enrolled patients were assessable for BTR (% of initial tumor size), TTP (day), and OS (day) in the clinical study, and we successfully developed the best linear model for each, which converted the quantified expression data of the 7 selected genes into objective BTR, TTP, and OS. We used 20, 16, and 15 tumor specimens and constructed potent prediction formulae for BTR (r=0.9420), TTP (r=0.7103), and OS (r=0.8406), respectively. Utility-confirmation analyses using another 16, 10, 13 clinical samples appeared to show that the formulae could predict BTR (r=0.6491, p=0.007) and OS (r=0.7947, p=0.011). We also fixed the best linear models using 5 other known marker genes, but they had less advantage in prediction. Conclusions: Despite limited data, our developed formulae using the 7 novel genes would provide advantages in prediction of individual response to CPT-11. Based on the positive results of this study, we have initiated a large scale validation study of the formula. [Table: see text]
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Affiliation(s)
- H. Takemoto
- Sakai Municipal Hospital, Sakai, Osaka, Japan; Hyogo Medical University, Nishinomiya, Hyogo, Japan; Suita Municipal Hospital, Suita, Osaka, Japan; Kansairosai Hospital, Amagasaki, Hyogo, Japan; Osaka Medical Center Cancer & Cardiovascular Diseases, Osaka, Japan; Osaka Seamen's Insurance Hospital, Osaka, Japan; Hiroshima University, RIRBM, Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - N. Tomita
- Sakai Municipal Hospital, Sakai, Osaka, Japan; Hyogo Medical University, Nishinomiya, Hyogo, Japan; Suita Municipal Hospital, Suita, Osaka, Japan; Kansairosai Hospital, Amagasaki, Hyogo, Japan; Osaka Medical Center Cancer & Cardiovascular Diseases, Osaka, Japan; Osaka Seamen's Insurance Hospital, Osaka, Japan; Hiroshima University, RIRBM, Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - K. Murata
- Sakai Municipal Hospital, Sakai, Osaka, Japan; Hyogo Medical University, Nishinomiya, Hyogo, Japan; Suita Municipal Hospital, Suita, Osaka, Japan; Kansairosai Hospital, Amagasaki, Hyogo, Japan; Osaka Medical Center Cancer & Cardiovascular Diseases, Osaka, Japan; Osaka Seamen's Insurance Hospital, Osaka, Japan; Hiroshima University, RIRBM, Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - M. Fukunaga
- Sakai Municipal Hospital, Sakai, Osaka, Japan; Hyogo Medical University, Nishinomiya, Hyogo, Japan; Suita Municipal Hospital, Suita, Osaka, Japan; Kansairosai Hospital, Amagasaki, Hyogo, Japan; Osaka Medical Center Cancer & Cardiovascular Diseases, Osaka, Japan; Osaka Seamen's Insurance Hospital, Osaka, Japan; Hiroshima University, RIRBM, Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - S. Okamura
- Sakai Municipal Hospital, Sakai, Osaka, Japan; Hyogo Medical University, Nishinomiya, Hyogo, Japan; Suita Municipal Hospital, Suita, Osaka, Japan; Kansairosai Hospital, Amagasaki, Hyogo, Japan; Osaka Medical Center Cancer & Cardiovascular Diseases, Osaka, Japan; Osaka Seamen's Insurance Hospital, Osaka, Japan; Hiroshima University, RIRBM, Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - M. Ohue
- Sakai Municipal Hospital, Sakai, Osaka, Japan; Hyogo Medical University, Nishinomiya, Hyogo, Japan; Suita Municipal Hospital, Suita, Osaka, Japan; Kansairosai Hospital, Amagasaki, Hyogo, Japan; Osaka Medical Center Cancer & Cardiovascular Diseases, Osaka, Japan; Osaka Seamen's Insurance Hospital, Osaka, Japan; Hiroshima University, RIRBM, Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - H. Ishida
- Sakai Municipal Hospital, Sakai, Osaka, Japan; Hyogo Medical University, Nishinomiya, Hyogo, Japan; Suita Municipal Hospital, Suita, Osaka, Japan; Kansairosai Hospital, Amagasaki, Hyogo, Japan; Osaka Medical Center Cancer & Cardiovascular Diseases, Osaka, Japan; Osaka Seamen's Insurance Hospital, Osaka, Japan; Hiroshima University, RIRBM, Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - K. Tanimoto
- Sakai Municipal Hospital, Sakai, Osaka, Japan; Hyogo Medical University, Nishinomiya, Hyogo, Japan; Suita Municipal Hospital, Suita, Osaka, Japan; Kansairosai Hospital, Amagasaki, Hyogo, Japan; Osaka Medical Center Cancer & Cardiovascular Diseases, Osaka, Japan; Osaka Seamen's Insurance Hospital, Osaka, Japan; Hiroshima University, RIRBM, Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - K. Hiyama
- Sakai Municipal Hospital, Sakai, Osaka, Japan; Hyogo Medical University, Nishinomiya, Hyogo, Japan; Suita Municipal Hospital, Suita, Osaka, Japan; Kansairosai Hospital, Amagasaki, Hyogo, Japan; Osaka Medical Center Cancer & Cardiovascular Diseases, Osaka, Japan; Osaka Seamen's Insurance Hospital, Osaka, Japan; Hiroshima University, RIRBM, Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - M. Nishiyama
- Sakai Municipal Hospital, Sakai, Osaka, Japan; Hyogo Medical University, Nishinomiya, Hyogo, Japan; Suita Municipal Hospital, Suita, Osaka, Japan; Kansairosai Hospital, Amagasaki, Hyogo, Japan; Osaka Medical Center Cancer & Cardiovascular Diseases, Osaka, Japan; Osaka Seamen's Insurance Hospital, Osaka, Japan; Hiroshima University, RIRBM, Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
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Ikeda R, Yoshida K, Satou Y, Takahashi M, Une Y, Yamamoto W, Tanimoto K, Hiyama K, Sasaki Y, Nishiyama M. Randomized phase II/III study of docetaxel/S-1 (DS-1) versus CDDP/5FU (FUP) in advanced or recurrent gastric cancer: Updated phase II results. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.4595] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
4595 Background: Our previous single arm phase II trial demonstrated that the combination of DS-1 was one of the most powerful candidates to become a standard regimen for metastatic gastric cancer (K. Yoshida, et al: Clin Cancer Res 2006). This trial evaluated DS-1 and FUP in advanced or recurrent gastric cancer, and the primary objective of the phase II part was to evaluate activity and safety of the 2 regimens. Methods: Patients with advanced or recurrent gastric cancer, who had not received any chemotherapy except one regimen (not including taxanes), were eligible for this trial. Patients were randomized to either: DS-1, intravenous administration of 40 mg/m2 docetaxel on Day1 and oral administration of 80–120 mg/m2/day S-1 on Days 1 to 14 every 3 weeks, or FUP, intravenous continuous administration of 800 mg/m2/day 5-FU on Day 1 to 5 and intravenous administration of 80 mg/m2/day CDDP on Day 2 every 4 weeks. Results: Between June 2005 and August 2008, forty-nine of 54 patients (ECOG PS 0–2) were randomized to DS-1 (n=24) or FUP (n=25). Response rates (CR+PR) assessed by RECIST were 88.3% (CI;62.6–95.3) vs 52.0% (CI; 31.3–72.2, P=0.032), median times to treatment failure (TTF) were 122 days (CI; 75.2–168.8) vs 85 days (CI;67.9–102.1, P=0.003), median progression free survivals (PFS) were 198 days (CI;117.8–278.4) vs 105 days (CI;90.3–119.7, P=0.066). Median overall survival times (MSTs) were 369 days (CI; 359.6–378.4) vs 371 days (CI; 297.2- 444.8, P=0.281), but as of today, 14 pts (8 in DS-1 and 6 in FUP) are still alive. Grade 3/4 adverse events assessed by CTCAE v3.0 occurring in ≥20% patients, were neutropenia (58.3% vs 28.0%), nausea (4.2% vs 20.0%), leucopenia (33.0% vs 4.0%), fatigue (0% vs 20.0%) and anorexia (8.3% vs 32.0%). All treatment-related adverse events were resolved and no toxic death was reported. Conclusions: DS-1 significantly improved the RR and TTF in advanced or recurrent gastric cancer patients. To clarify the survival benefit, a phase III continuation of the study is in preparation. No significant financial relationships to disclose.
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Affiliation(s)
- R. Ikeda
- Development Organization for Frontier Med Therap., Hiroshima, Japan; Gifu University, Graduate School of Medicine, Gifu, Japan; Kawakita General Hospital, Tokyo, Japan; Asahikawa-Kosei General Hospital, Asahikawa, Japan; Nishi Sapporo Natl Hosp., Sapporo, Japan; Senju Central Clinic, Tokyo, Japan; Hiroshima University, R.I.R.B.M., Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - K. Yoshida
- Development Organization for Frontier Med Therap., Hiroshima, Japan; Gifu University, Graduate School of Medicine, Gifu, Japan; Kawakita General Hospital, Tokyo, Japan; Asahikawa-Kosei General Hospital, Asahikawa, Japan; Nishi Sapporo Natl Hosp., Sapporo, Japan; Senju Central Clinic, Tokyo, Japan; Hiroshima University, R.I.R.B.M., Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - Y. Satou
- Development Organization for Frontier Med Therap., Hiroshima, Japan; Gifu University, Graduate School of Medicine, Gifu, Japan; Kawakita General Hospital, Tokyo, Japan; Asahikawa-Kosei General Hospital, Asahikawa, Japan; Nishi Sapporo Natl Hosp., Sapporo, Japan; Senju Central Clinic, Tokyo, Japan; Hiroshima University, R.I.R.B.M., Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - M. Takahashi
- Development Organization for Frontier Med Therap., Hiroshima, Japan; Gifu University, Graduate School of Medicine, Gifu, Japan; Kawakita General Hospital, Tokyo, Japan; Asahikawa-Kosei General Hospital, Asahikawa, Japan; Nishi Sapporo Natl Hosp., Sapporo, Japan; Senju Central Clinic, Tokyo, Japan; Hiroshima University, R.I.R.B.M., Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - Y. Une
- Development Organization for Frontier Med Therap., Hiroshima, Japan; Gifu University, Graduate School of Medicine, Gifu, Japan; Kawakita General Hospital, Tokyo, Japan; Asahikawa-Kosei General Hospital, Asahikawa, Japan; Nishi Sapporo Natl Hosp., Sapporo, Japan; Senju Central Clinic, Tokyo, Japan; Hiroshima University, R.I.R.B.M., Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - W. Yamamoto
- Development Organization for Frontier Med Therap., Hiroshima, Japan; Gifu University, Graduate School of Medicine, Gifu, Japan; Kawakita General Hospital, Tokyo, Japan; Asahikawa-Kosei General Hospital, Asahikawa, Japan; Nishi Sapporo Natl Hosp., Sapporo, Japan; Senju Central Clinic, Tokyo, Japan; Hiroshima University, R.I.R.B.M., Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - K. Tanimoto
- Development Organization for Frontier Med Therap., Hiroshima, Japan; Gifu University, Graduate School of Medicine, Gifu, Japan; Kawakita General Hospital, Tokyo, Japan; Asahikawa-Kosei General Hospital, Asahikawa, Japan; Nishi Sapporo Natl Hosp., Sapporo, Japan; Senju Central Clinic, Tokyo, Japan; Hiroshima University, R.I.R.B.M., Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - K. Hiyama
- Development Organization for Frontier Med Therap., Hiroshima, Japan; Gifu University, Graduate School of Medicine, Gifu, Japan; Kawakita General Hospital, Tokyo, Japan; Asahikawa-Kosei General Hospital, Asahikawa, Japan; Nishi Sapporo Natl Hosp., Sapporo, Japan; Senju Central Clinic, Tokyo, Japan; Hiroshima University, R.I.R.B.M., Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - Y. Sasaki
- Development Organization for Frontier Med Therap., Hiroshima, Japan; Gifu University, Graduate School of Medicine, Gifu, Japan; Kawakita General Hospital, Tokyo, Japan; Asahikawa-Kosei General Hospital, Asahikawa, Japan; Nishi Sapporo Natl Hosp., Sapporo, Japan; Senju Central Clinic, Tokyo, Japan; Hiroshima University, R.I.R.B.M., Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - M. Nishiyama
- Development Organization for Frontier Med Therap., Hiroshima, Japan; Gifu University, Graduate School of Medicine, Gifu, Japan; Kawakita General Hospital, Tokyo, Japan; Asahikawa-Kosei General Hospital, Asahikawa, Japan; Nishi Sapporo Natl Hosp., Sapporo, Japan; Senju Central Clinic, Tokyo, Japan; Hiroshima University, R.I.R.B.M., Hiroshima, Japan; Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
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Taguchi A, Ohtsuka M, Nakamoto T, Suei Y, Kudo Y, Tanimoto K, Bollen AM. Detection of post-menopausal women with low bone mineral density and elevated biochemical markers of bone turnover by panoramic radiographs. Dentomaxillofac Radiol 2008; 37:433-7. [DOI: 10.1259/dmfr/85235532] [Citation(s) in RCA: 12] [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] [Indexed: 11/05/2022] Open
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Yamashina A, Tanimoto K, Sutthiprapaporn P, Hayakawa Y. The reliability of computed tomography (CT) values and dimensional measurements of the oropharyngeal region using cone beam CT: comparison with multidetector CT. Dentomaxillofac Radiol 2008; 37:245-51. [PMID: 18606745 DOI: 10.1259/dmfr/45926904] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES To evaluate the reliability of cone beam CT (CBCT) values and dimensional measurements of oropharyngeal air spaces as compared with those of multidetector row CT (MDCT). METHODS A soft tissue equivalent phantom with different sized holes was used. The phantom was scanned using CBCT and MDCT. In addition, a volunteer was examined using both methods for clinical comparison. The CT data were retrieved to a personal computer and treated using image processing software for three-dimensional rendering and dimensional measurements. The CT values of air, water and soft tissues were measured experimentally and the CT values of air, fat and muscle were measured in a clinical case. The diameter of each hole drilled in the phantom was measured on CBCT and MDCT images using the software tool and digimatic callipers. RESULTS The CBCT values were quite different from the Hounsfield units obtained with a typical MDCT system. The standard deviations were almost ten times larger with CBCT. In vivo assessment showed that the CBCT values for fat had a wide range that partially overlapped the values for muscle. The measurement of distances greater than 4 mm was consistent for all methods. The difference for holes was less than 0.2 mm. CONCLUSIONS The phantom study showed that CBCT provides limited quantitative CT values for each pixel on sliced images for differentiating air, water and soft tissues. However, the measurement of air spaces with CBCT was quite accurate.
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Affiliation(s)
- A Yamashina
- Department of Oral and Maxillofacial Radiology, Graduate School of Biomedical Sciences, Hiroshima University, Japan
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Nakamoto T, Taguchi A, Ohtsuka M, Suei Y, Fujita M, Tsuda M, Sanada M, Kudo Y, Asano A, Tanimoto K. A computer-aided diagnosis system to screen for osteoporosis using dental panoramic radiographs. Dentomaxillofac Radiol 2008; 37:274-81. [DOI: 10.1259/dmfr/68621207] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Taguchi A, Asano A, Ohtsuka M, Nakamoto T, Suei Y, Tsuda M, Kudo Y, Inagaki K, Noguchi T, Tanimoto K, Jacobs R, Klemetti E, White SC, Horner K. Observer performance in diagnosing osteoporosis by dental panoramic radiographs: results from the osteoporosis screening project in dentistry (OSPD). Bone 2008; 43:209-213. [PMID: 18482878 DOI: 10.1016/j.bone.2008.03.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [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] [Received: 05/01/2007] [Revised: 03/11/2008] [Accepted: 03/14/2008] [Indexed: 10/22/2022]
Abstract
Mandibular cortical erosion detected on dental panoramic radiographs (DPRs) may be useful for identifying women with osteoporosis, but little is known about the variation in diagnostic efficacy of observers worldwide. The purpose of this study was to measure the accuracy in identifying women at risk for osteoporosis in a worldwide group of observers using DPRs. We constructed a website that included background information about osteoporosis screening and instructions regarding the interpretation of mandibular cortical erosion. DPRs of 100 Japanese postmenopausal women aged 50 years or older who had completed skeletal bone mineral measurements by dual energy X-ray absorptiometry were digitized at 300 dpi. These were displayed on the website and used for the evaluation of diagnostic efficacy. Sixty observers aged 25 to 66 years recruited from 16 countries participated in this study. These observers classified cortical erosion into one of three groups (none, mild to moderate, and severe) on the website via the Internet, twice with an approximately 2-week interval. The diagnostic efficacy of the Osteoporosis Self-Assessment Tool (OST), a simple clinical decision rule based on age and weight, was also calculated and compared with that of cortical erosion. The overall mean sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of the 60 observers in identifying women with osteoporosis by cortical erosion on DPRs were 82.5, 46.2, 46.7, and 84.0%, respectively. Those same values by the OST index were 82.9, 43.1, 43.9, and 82.4%, respectively. The intra-observer agreement in classifying cortical erosion on DPRs was sufficient (weighted kappa values>0.6) in 36 (60%) observers. This was significantly increased in observers who specialized in oral radiology (P<0.05). In the 36 observers with sufficient intra-observer agreement, the overall mean sensitivity, specificity, PPV, and NPV in identifying women with osteoporosis by any cortical erosion were 83.5, 48.7, 48.3, and 85.7%, respectively. The mean PPV and NPV were significantly higher in the 36 observers with sufficient intra-observer agreement than in the 24 observers with insufficient intra-observer agreement. Our results reconfirm the efficacy of cortical erosion findings in identifying postmenopausal women at risk for osteoporosis, among observers with sufficient intra-observer agreement. Information gathered from radiographic examination is at least as useful as that gathered from the OST index.
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Affiliation(s)
- A Taguchi
- Department of Oral and Maxillofacial Radiology, Hiroshima University Hospital, Hiroshima, Japan.
| | - A Asano
- Division of Mathematical and Information Sciences, Faculty of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Japan
| | - M Ohtsuka
- Department of Oral and Maxillofacial Radiology, Division of Medical Intelligence and Informatics, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan
| | - T Nakamoto
- Department of Oral and Maxillofacial Radiology, Division of Medical Intelligence and Informatics, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan
| | - Y Suei
- Department of Oral and Maxillofacial Radiology, Hiroshima University Hospital, Hiroshima, Japan
| | - M Tsuda
- Department of Obstetrics and Gynecology, Division of Clinical Medical Science, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan
| | - Y Kudo
- Department of Obstetrics and Gynecology, Division of Clinical Medical Science, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan
| | - K Inagaki
- Department of Periodontology, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan
| | - T Noguchi
- Department of Periodontology, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan
| | - K Tanimoto
- Department of Oral and Maxillofacial Radiology, Division of Medical Intelligence and Informatics, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan
| | - R Jacobs
- Oral Imaging Centre, School of Dentistry, Oral Pathology and Maxillofacial Surgery, Catholic University Leuven, Belgium
| | - E Klemetti
- Department of Prosthetic Dentistry and Stomatognathic Physiology, University of Tromsø, Norway
| | - S C White
- Section of Oral and Maxillofacial Radiology, UCLA School of Dentistry, Los Angeles, USA
| | - K Horner
- Unit of Oral Radiology, University Dental Hospital of Manchester, Manchester, UK
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Sutthiprapaporn P, Tanimoto K, Ohtsuka M, Nagasaki T, Iida Y, Katsumata A. Positional changes of oropharyngeal structures due to gravity in the upright and supine positions. Dentomaxillofac Radiol 2008; 37:130-5. [PMID: 18316503 DOI: 10.1259/dmfr/31005700] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To compare the responses of oropharyngeal structures to gravity while sitting upright or lying down in a supine position. METHODS Seven subjects were evaluated by cone beam CT (CBCT) while in the upright position and by a four-row multidetector helical CT (MDCT) while in the supine position. All of the voxel sizes were adjusted to be 0.3x0.3x0.3 mm3 in the x-y-z axis. The posterior nasal spine, basion and fourth cervical bone were used as references to measure positional changes in the oropharyngeal structures between the upright and supine positions. The smallest areas in the oropharynx were also evaluated. RESULTS The soft palate, epiglottis and entrance of the oesophagus moved caudally with the positional change from supine to sitting upright, and moved posteriorly when the position changed from an upright to a supine position. The hyoid bone moved caudally but not posteriorly in response to the same positional changes. The width and length of the smallest area present in the oropharynx was larger in the upright position than in the supine position. CONCLUSIONS Gravity can produce movements in oropharyngeal structures in response to postural changes between sitting upright and lying in the supine position.
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Affiliation(s)
- P Sutthiprapaporn
- Department of Oral and Maxillofacial Radiology, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
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Tanimoto K, Le T, Zhu L, Witkowska HE, Robinson S, Hall S, Hwang P, Denbesten P, Li W. Reduced amelogenin-MMP20 interactions in amelogenesis imperfecta. J Dent Res 2008; 87:451-5. [PMID: 18434575 DOI: 10.1177/154405910808700516] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Amelogenin with a proline 41 to threonine mutation (P41T) is hydrolyzed at a lower rate by matrix metalloproteinase 20 (MMP20), resulting in an inherited tooth enamel defect, amelogenesis imperfecta (AI). The aim of this study was to elucidate the effect of P41T on the interactions between amelogenin and MMP20, which may contribute to the formation of this type of AI. The interactions of a recombinant wild-type human amelogenin and its P41T mutant with recombinant human MMP20 were compared by substrate competition assay, pull-down assay, and surface plasmon resonance (SPR). The results showed that the binding of the P41T mutant amelogenin for MMP20 was significantly lower than that of wild-type amelogenin. Our study supports a model in which the P41T mutation reduces the interactions between amelogenin and MMP20, leading to decreased degradation of amelogenin by MMP20, and resulting in AI.
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Affiliation(s)
- K Tanimoto
- Department of Orofacial Sciences, School of Dentistry, University of California at San Francisco, San Francisco, CA 94143, USA
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Nakamura H, Tanimoto K, Hiyama K, Yunokawa M, Kawamoto T, Kato Y, Yoshiga K, Poellinger L, Hiyama E, Nishiyama M. Human mismatch repair gene, MLH1, is transcriptionally repressed by the hypoxia-inducible transcription factors, DEC1 and DEC2. Oncogene 2008; 27:4200-9. [PMID: 18345027 DOI: 10.1038/onc.2008.58] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Tumor hypoxia has been reported to cause a functional loss in DNA mismatch repair (MMR) system as a result of downregulation of MMR genes, although the precise molecular mechanisms remain unclear. In this study, we focused on the downregulation of a key MMR gene, MLH1, and demonstrated that hypoxia-inducible transcription repressors, differentiated embryo chondrocytes (DEC1 and 2), participated in its transcriptional regulation via their bindings to E-box-like motif(s) in MLH1 promoter region. In all cancer cell lines examined, hypoxia increased expression of DEC1 and 2, known as hypoxia-inducible genes, but decreased MLH1 expression in an exposure time-dependent manner at both the mRNA and protein levels. Co-transfection reporter assay revealed that DEC1 and, to greater extent, DEC2 as well as hypoxia-repressed MLH1 promoter activity. We further found that the action was remarkably inhibited by trichostatin A, and identified a possible DEC-response element in the MLH1 promoter. In vitro electrophoretic gel mobility shift and chromatin immunoprecipitation assays demonstrated that DEC1 or 2 directly bounds to the suggested element, and transient transfection assay revealed that overexpression of DEC2 repressed endogenous MLH1 expression in the cells. Hypoxia-induced DEC may impair MMR function through repression of MLH1 expression, possibly via the histone deacethylase-mediated mechanism in cancer cells.
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Affiliation(s)
- H Nakamura
- Department of Translational Cancer Research, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
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Tanimoto K, Le T, Zhu L, Chen J, Featherstone JDB, Li W, DenBesten P. Effects of fluoride on the interactions between amelogenin and apatite crystals. J Dent Res 2008; 87:39-44. [PMID: 18096891 DOI: 10.1177/154405910808700106] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Fluorosed enamel is more porous and less mineralized, possibly related to altered amelogenin-modulated crystal growth. The purpose of this study was to examine the role of fluoride in interactions between amelogenin and apatite crystals. Recombinant human amelogenin (rh174) was bound to carbonated hydroxyapatite containing various amounts of fluoride, and analyzed by protein assay, SDS PAGE, and AFM. Interactions between rh174 and fluoride were assayed by isothermal titration calorimetry (ITC). The initial binding rate of rh174, as well as total amount of rh174 bound to fluoride-containing carbonated hydroxyapatite, was greater than that in the control carbonated hydroxyapatite. Fluoride in solution at physiologic (5.3 micromolar, or 0.1 ppm) concentrations showed no significant effect on binding, but higher fluoride levels significantly decreased protein binding. ITC showed no interactions between fluoride and rh174. These results suggest that fluoride incorporation into the crystal lattice alters the crystal surface to enhance amelogenin binding, with no direct interactions between fluoride and amelogenin.
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Affiliation(s)
- K Tanimoto
- Department of Orofacial Sciences, University of California, San Francisco, 513 Parnasuss Avenue, San Francisco, CA 94143, USA
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Abstract
A rat model of lumbar root constriction with an additional sympathectomy in some animals was used to assess whether the sympathetic nerves influenced radicular pain. Behavioural tests were undertaken before and after the operation. On the 28th post-operative day, both dorsal root ganglia and the spinal roots of L4 and L5 were removed, frozen and sectioned on a cryostat (8 μm to 10 μm). Immunostaining was then performed with antibodies to tyrosine hydroxylase (TH) according to the Avidin Biotin Complex method. In order to quantify the presence of sympathetic nerve fibres, we counted TH-immunoreactive fibres in the dorsal root ganglia using a light microscope equipped with a micrometer graticule (10 x 10 squares, 500 mm x 500 mm). We counted the squares of the graticule which contained TH-immunoreactive fibres for each of five randomly-selected sections of the dorsal root ganglia. The root constriction group showed mechanical allodynia and thermal hyperalgesia. In this group, TH-immunoreactive fibres were abundant in the ipsilateral dorsal root ganglia at L5 and L4 compared with the opposite side. In the sympathectomy group, mechanical hypersensitivity was attenuated significantly. We consider that the sympathetic nervous system plays an important role in the generation of radicular pain.
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Affiliation(s)
| | | | | | | | - N. Tohse
- Department of Cellular Physiology and Signal Transduction School of Medicine Sapporo Medical University, South 1, West 16 & 17, Chuo-ku, Sapporo 060–8543, Japan
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Taguchi A, Ohtsuka M, Tsuda M, Nakamoto T, Kodama I, Inagaki K, Noguchi T, Kudo Y, Suei Y, Tanimoto K. Risk of vertebral osteoporosis in post-menopausal women with alterations of the mandible. Dentomaxillofac Radiol 2007; 36:143-8. [PMID: 17463098 DOI: 10.1259/dmfr/50171930] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Previous studies have suggested that a thin or eroded cortex of the mandible detected on dental panoramic radiographs is associated with low vertebral bone mineral density (BMD) or osteoporosis. However, those studies did not estimate the multivariate-adjusted risk for low vertebral BMD or osteoporosis associated with alterations of the mandible. METHODS BMD of the lumbar vertebrae (L2-L4) was compared among quartiles of cortical width and among three cortical shape categories in 450 post-menopausal women (mean age, 57.2 years), adjusted for potential confounders. The odds ratios for low BMD or osteoporosis according to cortical width and shape were also calculated. RESULTS Significant associations were found between cortical width and shape, and vertebral BMD. The odds ratios for low vertebral BMD associated with the second, third and lowermost quartiles of cortical width were 1.71 (95% confidence interval (CI), 0.96-3.05), 2.30 (95% CI, 1.29-4.11) and 5.43 (95% CI, 2.16-10.71), respectively, compared with the uppermost quartile. The odds ratios for osteoporosis according to cortical width category were similar to those for low BMD. The odds ratios for low BMD associated with mildly to moderately and severely eroded cortices were 3.85 (95% CI, 2.37-6.25) and 7.84 (95% CI, 2.57-23.90), respectively, compared with normal cortex. The odds ratios for osteoporosis associated with mildly to moderately and severely eroded cortices were 4.73 (95% CI, 2.54-8.80) and 14.73 (95% CI, 6.14-35.47), respectively. CONCLUSIONS Post-menopausal women with alterations of the mandible may have an increased risk for low vertebral BMD or osteoporosis.
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Affiliation(s)
- A Taguchi
- Department of Oral and Maxillofacial Radiology, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-Ku, Hiroshima 734-8553, Japan.
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Taguchi A, Ohtsuka M, Nakamoto T, Naito K, Tsuda M, Kudo Y, Motoyama E, Suei Y, Tanimoto K. Identification of post-menopausal women at risk of osteoporosis by trained general dental practitioners using panoramic radiographs. Dentomaxillofac Radiol 2007; 36:149-54. [PMID: 17463099 DOI: 10.1259/dmfr/31116116] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND An eroded inferior cortex of the mandible on panoramic radiographs may be useful for identifying post-menopausal women with low bone mineral density (BMD), or osteoporosis. The purpose of this study was to assess whether trained general dental practitioners (GDPs) can identify post-menopausal women with undetected low skeletal BMD as well as spinal fractures by panoramic radiographs in their clinics. METHODS Out of 455 women aged 50 years and older who visited the dental clinics of 22 trained GDPs and had panoramic radiographic assessment for the examination of dental diseases between June and December 2004, 168 post-menopausal women were diagnosed as having low skeletal BMD based on cortical erosion findings. Of these women, 39 women aged 50-84 years (mean age (SD, standard deviation), 64.8 (7.4) years) with no previous diagnosis of osteoporosis participated in this study. BMD at the lumbar spine and femoral neck was measured using dual energy X-ray absorptiometry (DXA). Spine fractures were assessed on lateral radiographs obtained at the time of the DXA assessment. RESULTS Two women (5.1%) had normal BMD (BMD T-score>-1.0), 21 women (53.9%) had osteopenia (BMD T-score of -2.5 to -1.0) and 16 women (41.0%) had osteoporosis (BMD T-score<-2.5). Eight women (20.5%) had fractures at the thoracic spine, lumbar spine, or both. CONCLUSIONS Our results suggest that a high percentage of post-menopausal women with undetected low skeletal BMD as well as spinal fractures may be identified based on trained GDPs' analyses of their panoramic radiographs.
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Affiliation(s)
- A Taguchi
- Department of Oral and Maxillofacial Radiology, Hiroshima University Hospital, 1-2-3 Kasumi Minami-ku, Hiroshima 734-8553, Japan.
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Yakushijin Y, Kodama T, Tanimoto K, Yamanouchi J, Azuma T, Narumi H, Hato T, Hasegawa H, Yasukawa M. Absence of chlamydial infection in Japanese patients with orbital adnexal MALT lymphoma. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.18523] [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: 11/20/2022] Open
Abstract
18523 Background: The extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma) is a distinct B-cell lymphoma that develops in extranodal sites and usually has an indolent clinical course as a localized disease. Recent clinicopathological studies suggest a strong relation between MALT lymphoma and inflammatory diseases of the epithelium such as autoimmune diseases and infections (Sjogren’s syndrome, Hashimoto’s thyroiditis, Helicobacter pylori infection, and etc.), because chronic antigen stimulation has been causally linked to the development of B-cells lymphoproliferative diseases. MALT lymphoma grows in extranodal lymphoid tissue and exists in epithelium tissues, and it is often difficult to distinguish malignant lymphoid tissue from benign inflammation. This is one cause since recent positive or negative correlations between ocular adnexal MALT lymphomas and chlamydial infections have been reported from different researchers, indicate several possible explanations. Methods: Twenty-three cases of ocular adnexal MALT lymphoma in southern regions of Japan, whose monoclonality was confirmed by immunoglobulin heavy chain gene rearrangement and/or cell surface antigens, were analyzed for evidence of several causative factors using ELISA analysis to detect antibodies and Southern blot analysis followed by specific PCR gene amplification. Results: Our series of patients did not show any serological relations to Epstein-Barr virus, Hepatitis C virus, and Chlamydophila psittaci. Two cases had positive serum antibodies for autoimmunity, and another two cases had positive antibodies against Chlamydia trachomatis. None of our cases showed the presence of chlamydial 16S rRNA and 16S-23S spacer rRNA genes (C. psittac, C trachomatis, C. pneumoniae, and C. felis) after Southern blot analysis followed by PCR amplification. Conclusions: Inflammatory agents are still unknown in our series of orbital adnexal MALT lymphomas, and some types of chlamydial infections are not associated with orbital adnexal MALT lymphoma in southern regions of Japan. No significant financial relationships to disclose.
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Affiliation(s)
- Y. Yakushijin
- Ehime University Graduate School of Medicine, Ehime, Japan; Matsuyama Red Cross Hospital, Matsuyama, Japan; Ehime University Graduate School of Medicine, Tohon-shi, Japan
| | - T. Kodama
- Ehime University Graduate School of Medicine, Ehime, Japan; Matsuyama Red Cross Hospital, Matsuyama, Japan; Ehime University Graduate School of Medicine, Tohon-shi, Japan
| | - K. Tanimoto
- Ehime University Graduate School of Medicine, Ehime, Japan; Matsuyama Red Cross Hospital, Matsuyama, Japan; Ehime University Graduate School of Medicine, Tohon-shi, Japan
| | - J. Yamanouchi
- Ehime University Graduate School of Medicine, Ehime, Japan; Matsuyama Red Cross Hospital, Matsuyama, Japan; Ehime University Graduate School of Medicine, Tohon-shi, Japan
| | - T. Azuma
- Ehime University Graduate School of Medicine, Ehime, Japan; Matsuyama Red Cross Hospital, Matsuyama, Japan; Ehime University Graduate School of Medicine, Tohon-shi, Japan
| | - H. Narumi
- Ehime University Graduate School of Medicine, Ehime, Japan; Matsuyama Red Cross Hospital, Matsuyama, Japan; Ehime University Graduate School of Medicine, Tohon-shi, Japan
| | - T. Hato
- Ehime University Graduate School of Medicine, Ehime, Japan; Matsuyama Red Cross Hospital, Matsuyama, Japan; Ehime University Graduate School of Medicine, Tohon-shi, Japan
| | - H. Hasegawa
- Ehime University Graduate School of Medicine, Ehime, Japan; Matsuyama Red Cross Hospital, Matsuyama, Japan; Ehime University Graduate School of Medicine, Tohon-shi, Japan
| | - M. Yasukawa
- Ehime University Graduate School of Medicine, Ehime, Japan; Matsuyama Red Cross Hospital, Matsuyama, Japan; Ehime University Graduate School of Medicine, Tohon-shi, Japan
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Ikeda R, Yoshida K, Takagane A, Tsuburaya A, Kobayashi O, Sunouchi H, Matsukawa M, Tanimoto K, Hiyama K, Nishiyama M. Pharmacogenomic (PG) analysis for prediction of individual response to paclitaxel in 5-FU-refractory metastatic gastric cancer: Prediction formula of tumor response using novel marker genes and genotypes associated with the toxicity. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.2538] [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: 11/20/2022] Open
Abstract
2538 Background: Taxanes offer hope for improving outcomes of metastatic gastric cancer patients including 5-FU failure cases, but the response remarkably varies among patients. We conducted this prospective PG study for paclitaxel monotherapy to develop a prediction formula of efficacy and to identify potent genetic markers of toxicity. Methods: Paclitaxel was intravenously given on Days 1, 8, and 15, every 4 weeks in 5-FU failure metastatic gastric cancer patients with typical eligibility criteria. Tumor and blood samples were collected before the initial paclitaxel administration for PG. PK analysis was done on day 1 of cycle 1. Tumor response and toxicity were evaluated by RECIST and CTCAE, respectively. Results: Forty-nine pts were enrolled, and up to date, 48 and 44 pts have been determined for worst toxicity and best tumor response, respectively. Observed response rate was 27.3% (12/44), and common grade 3/4 toxicities were neutropenia (31.3%) and leucopenia (20.8%). PG analysis demonstrated that CYP2C8*1C (w/v=27, v/v=5) and CYP2C8 -411T>C (w/v=24, v/v=10) were weakly associated with grade 3/4 leucopenia (p=0.087 and 0.092), and CYP2C8 IVS7+49T> A (w/v=9, v/v=6) might correlate with grade 3/4 anemia (p=0.039), although none of them correlated with any PK parameter. We identified 4 novel potent marker genes (SEPT5, MARN2, PER3, and PISA3) for paclitaxel efficacy in vitro through microarray expression analysis, and then successfully developed the best linear models, which converted the quantified expression data into objective clinical response, in terms of best tumor response (r=0.985, AICS=-5.269) and overall survival (r=0.980, AICS=6.953), using 15 and 13 data sets of gene expression and clinical response, respectively. At present, utility-confirmation analyses using other clinical samples appeared to show that the formulae could accurately predict tumor response. Conclusions: Polygenetic strategies using several known polymorphisms for toxicity and a prediction formula using 4 novel genes for efficacy would be of predictive value for individual response to paclitaxel. No significant financial relationships to disclose.
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Affiliation(s)
- R. Ikeda
- Hiroshima Cancer Ther Dev Org, Hiroshima, Japan; Hiroshima Univ, Hiroshima, Japan; Iwate Med Univ, Morioka, Japan; Kanagawa Cancer Ctr Hosp, Yokohama, Japan; Kawakita General Hosp, Tokyo, Japan; Showa Univ Toyosu Hosp, Tokyo, Japan
| | - K. Yoshida
- Hiroshima Cancer Ther Dev Org, Hiroshima, Japan; Hiroshima Univ, Hiroshima, Japan; Iwate Med Univ, Morioka, Japan; Kanagawa Cancer Ctr Hosp, Yokohama, Japan; Kawakita General Hosp, Tokyo, Japan; Showa Univ Toyosu Hosp, Tokyo, Japan
| | - A. Takagane
- Hiroshima Cancer Ther Dev Org, Hiroshima, Japan; Hiroshima Univ, Hiroshima, Japan; Iwate Med Univ, Morioka, Japan; Kanagawa Cancer Ctr Hosp, Yokohama, Japan; Kawakita General Hosp, Tokyo, Japan; Showa Univ Toyosu Hosp, Tokyo, Japan
| | - A. Tsuburaya
- Hiroshima Cancer Ther Dev Org, Hiroshima, Japan; Hiroshima Univ, Hiroshima, Japan; Iwate Med Univ, Morioka, Japan; Kanagawa Cancer Ctr Hosp, Yokohama, Japan; Kawakita General Hosp, Tokyo, Japan; Showa Univ Toyosu Hosp, Tokyo, Japan
| | - O. Kobayashi
- Hiroshima Cancer Ther Dev Org, Hiroshima, Japan; Hiroshima Univ, Hiroshima, Japan; Iwate Med Univ, Morioka, Japan; Kanagawa Cancer Ctr Hosp, Yokohama, Japan; Kawakita General Hosp, Tokyo, Japan; Showa Univ Toyosu Hosp, Tokyo, Japan
| | - H. Sunouchi
- Hiroshima Cancer Ther Dev Org, Hiroshima, Japan; Hiroshima Univ, Hiroshima, Japan; Iwate Med Univ, Morioka, Japan; Kanagawa Cancer Ctr Hosp, Yokohama, Japan; Kawakita General Hosp, Tokyo, Japan; Showa Univ Toyosu Hosp, Tokyo, Japan
| | - M. Matsukawa
- Hiroshima Cancer Ther Dev Org, Hiroshima, Japan; Hiroshima Univ, Hiroshima, Japan; Iwate Med Univ, Morioka, Japan; Kanagawa Cancer Ctr Hosp, Yokohama, Japan; Kawakita General Hosp, Tokyo, Japan; Showa Univ Toyosu Hosp, Tokyo, Japan
| | - K. Tanimoto
- Hiroshima Cancer Ther Dev Org, Hiroshima, Japan; Hiroshima Univ, Hiroshima, Japan; Iwate Med Univ, Morioka, Japan; Kanagawa Cancer Ctr Hosp, Yokohama, Japan; Kawakita General Hosp, Tokyo, Japan; Showa Univ Toyosu Hosp, Tokyo, Japan
| | - K. Hiyama
- Hiroshima Cancer Ther Dev Org, Hiroshima, Japan; Hiroshima Univ, Hiroshima, Japan; Iwate Med Univ, Morioka, Japan; Kanagawa Cancer Ctr Hosp, Yokohama, Japan; Kawakita General Hosp, Tokyo, Japan; Showa Univ Toyosu Hosp, Tokyo, Japan
| | - M. Nishiyama
- Hiroshima Cancer Ther Dev Org, Hiroshima, Japan; Hiroshima Univ, Hiroshima, Japan; Iwate Med Univ, Morioka, Japan; Kanagawa Cancer Ctr Hosp, Yokohama, Japan; Kawakita General Hosp, Tokyo, Japan; Showa Univ Toyosu Hosp, Tokyo, Japan
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Sawajiri M, Takinami S, Uchida T, Nomura Y, Mizoe J, Banik S, Tanimoto K. Expression of MMP-13 in osteoblast cells and rat tibia after exposure to gamma rays or accelerated carbon ions. Phys Med 2007; 23:73-9. [PMID: 17568546 DOI: 10.1016/j.ejmp.2007.03.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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] [Received: 10/28/2006] [Revised: 01/26/2007] [Accepted: 03/22/2007] [Indexed: 11/30/2022] Open
Abstract
In past research, we found that carbon ion irradiation increased bone volume in rats, and a significant amount of cartilage remained inside the carbon ion-irradiated trabeculae. The amounts of matrix metalloproteinase 13 (MMP-13) mRNA in osteoblast-like MC3T3-E1 cells tended to decrease after carbon ion irradiation. The level of MMP-13 mRNA in non-irradiated cells was stable during the experimental period, but in gamma ray-irradiated cells it tended to increase. When localization of MMP-13 in locally irradiated experimental rats was investigated, it was found in the marginal trabeculae in both non-irradiated and gamma ray-irradiated animals. MMP-13 was detected in osteoid and neogenetic bone in the trabeculae surface. The trabeculae in carbon ion-irradiated bone remained cartilaginous. Carbon ion-irradiated rats exhibited weak expression of MMP-13 around the cartilage inside the trabeculae. We conclude that carbon ion irradiation reduced expression of MMP-13, thus suppressing both chondrocyte maturation and cartilage resorption. Increases in hyperplasia of the bone trabeculae and of bone volume were caused by ongoing bone addition and calcification in the absence of sufficient cartilage resorption.
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Affiliation(s)
- M Sawajiri
- Department of Oral and Maxillofacial Radiology, Hiroshima University Hospital, 2-3 Kasumi-1, 734-8553 Hiroshima, Japan.
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Abstract
OBJECTIVES To improve the interpretation of simple bone cyst (SBC) lesions of the jaw. METHODS A comparative study of SBC lesions of the jaw and extracranial bones was performed through a literature survey. RESULTS In extracranial SBC, the cavities were always filled with fluid, and a high recurrence rate was shown through extensive research. Aneurysmal bone cyst (ABC) was included in the differential diagnosis owing to some clinicopathologic similarities. Fluid, gas and blood were found in the cavity in jawbone SBC, and recurrence was believed to be rare. Differential diagnosis was rarely discussed in the literature. CONCLUSIONS Based on reports, the cavity did not normally contain gas because no air-fluid level was observed on panoramic radiographs and no density/intensity area indicating gas was seen on CT or MRI. A blood-filled cavity should be examined carefully, and the possibility of an ABC should be considered. The recurrence rate needs to be re-estimated because an extensive survey has not been performed to clarify the treatment outcomes of jawbone SBC.
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Affiliation(s)
- Y Suei
- Department of Oral and Maxillofacial Radiology, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
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Ishii K, Taguchi A, Nakamoto T, Ohtsuka M, Sutthiprapaporn P, Tsuda M, Kodama I, Kudo Y, Sumida H, Suei Y, Tanimoto K. Diagnostic efficacy of alveolar bone loss of the mandible for identifying postmenopausal women with femoral osteoporosis. Dentomaxillofac Radiol 2007; 36:28-33. [PMID: 17329585 DOI: 10.1259/dmfr/28366679] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Mandibular cortical width (MCW) detected on panoramic radiographs may be useful for identifying postmenopausal women with osteoporosis. There is little known regarding whether alveolar bone loss (ABL) of the mandible detected on panoramic radiographs is a potentially accurate screening tool for osteoporosis in comparison with MCW. The purpose of this study was to evaluate whether ABL of the mandible on panoramic radiographs is useful for identifying femoral osteoporosis in postmenopausal women in comparison with MCW. METHODS Three hundred and fifty-four Japanese postmenopausal women (mean age+/-SD, 56.8+/-7.7 years) were recruited for this study. Femoral BMD was measured by dual energy X-ray absorptiometry. Panoramic radiographs were obtained to estimate ABL of the mandible and MCW. RESULTS A multiple regression analysis revealed that femoral BMD was significantly associated with MCW (P<0.001), weight (P<0.001), age (P<0.001) and ABL of the mandible (P=0.029; adjusted r(2)=0.380). The area under the ROC curve (AUC) for identifying femoral osteoporosis was 0.609 [95% confidence interval (CI), 0.523-0.696] for ABL of the mandible and 0.779 (95% CI, 0.713-0.844) for MCW, respectively. AUC for ABL of the mandible indicated less accuracy. CONCLUSIONS Our results suggest that ABL of the mandible on panoramic radiographs may not be useful for identifying postmenopausal women with femoral osteoporosis in comparison with MCW.
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Affiliation(s)
- K Ishii
- Department of Oral and Maxillofacial Radiology, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
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Sutthiprapaporn P, Taguchi A, Nakamoto T, Ohtsuka M, Mallick PC, Tsuda M, Kodama I, Kudo Y, Suei Y, Tanimoto K. Diagnostic performance of general dental practitioners after lecture in identifying post-menopausal women with low bone mineral density by panoramic radiographs. Dentomaxillofac Radiol 2006; 35:249-52. [PMID: 16798920 DOI: 10.1259/dmfr/16882209] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Mandibular cortical erosion detected on panoramic radiographs may be useful for identifying post-menopausal women with low skeletal bone mineral density (BMD). The purposes of this study were to calculate the diagnostic performance of general dental practitioners (GDPs) who attended a lecture on identifying post-menopausal women with low BMD from findings on panoramic radiographs and to evaluate the influence of GDPs' age on diagnostic performance. METHODS After a 1 h lecture, 111 GDPs were asked to classify the mandibular cortex (normal or eroded) on panoramic radiographs obtained from 100 post-menopausal women who have had skeletal BMD assessment. Low BMD was defined as a BMD T score of -1.0 or less. Diagnostic performance was analysed by comparing two groups classified by mandibular cortex (women with normal cortex and women with any eroded cortex) with those classified by BMD (women with normal BMD and women with low BMD). RESULTS The mean sensitivity, specificity, positive predictive value, negative predictive value, accuracy and likelihood ratio for a positive risk result were 73.0% (95% confidence interval [CI]; 71.3 to 74.7%), 49.0% (95% CI; 46.4 to 51.5%), 66.9% (95% CI; 66.0 to 67.8%), 57.0% (95% CI; 55.8 to 58.2%), 62.9% (95% CI; 62.1 to 63.7%) and 1.51 (95% CI; 1.44 to 1.58), respectively. GDPs' age did not influence diagnostic performance. CONCLUSIONS Our results suggest that 73.0% of women who had low skeletal BMD can be identified by GDPs after a lecture on the use of panoramic radiographs as an aid in diagnosing low BMD; however, the diagnostic performance may not be influenced by GDPs' age.
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Affiliation(s)
- P Sutthiprapaporn
- Department of Oral and Maxillofacial Radiology, Division of Medical Intelligence and Informatics, Hiroshima University, Hiroshima, Japan
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