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Ohtake A, Suga T, Goto S, Nakagawa D, Nakamura J. Atomic structure of the Se-passivated GaAs(001) surface revisited. Sci Rep 2023; 13:18140. [PMID: 37875507 PMCID: PMC10598220 DOI: 10.1038/s41598-023-45142-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 10/16/2023] [Indexed: 10/26/2023] Open
Abstract
We present a combined experimental and theoretical study of the Se-treated GaAs(001)-([Formula: see text]) surface. The ([Formula: see text]) structure with the two-fold coordinated Se atom at the outermost layer and the three-fold coordinated Se atom at the third layer was found to be energetically stable and agrees well with the experimental data from scanning tunneling microscopy, low energy electron diffraction, and x-ray photoelectron spectroscopy. This atomic geometry accounts for the improved stability of the Se-treated surface against the oxidation. The present result allows us to address a long-standing question on the structure of the Se-passivated GaAs surface, and will leads us to a more complete understanding of the physical origin of the electrical and chemical passivation of Se-treated GaAs surface.
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Affiliation(s)
- Akihiro Ohtake
- National Institute for Materials Science (NIMS), Tsukuba, 305-0044, Japan.
| | - Takayuki Suga
- Department of Engineering Science, The University of Electro-Communications (UEC-Tokyo), Chofu, Tokyo, 182-8585, Japan
| | - Shunji Goto
- Department of Engineering Science, The University of Electro-Communications (UEC-Tokyo), Chofu, Tokyo, 182-8585, Japan
| | - Daisuke Nakagawa
- Department of Engineering Science, The University of Electro-Communications (UEC-Tokyo), Chofu, Tokyo, 182-8585, Japan
| | - Jun Nakamura
- Department of Engineering Science, The University of Electro-Communications (UEC-Tokyo), Chofu, Tokyo, 182-8585, Japan
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Suga T, Nagamine T, Tu TT, Moriyama K, Toyofuku A. Orthognathic Surgery for Patients with Neurodevelopmental Disorders Requires Careful Decision-making by a Multidisciplinary Team. Innov Clin Neurosci 2022; 19:9-10. [PMID: 35958965 PMCID: PMC9341309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- Takayuki Suga
- Drs. Suga, Nagamine, Tu, and Toyofuko are with the Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University in Tokyo, Japan
| | - Takahiko Nagamine
- Drs. Suga, Nagamine, Tu, and Toyofuko are with the Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University in Tokyo, Japan
- Dr. Nagamine is with the Department of Psychiatric Internal Medicine, Sunlight Brain Research Center in Hofu, Japan
| | - Trang T.H. Tu
- Drs. Suga, Nagamine, Tu, and Toyofuko are with the Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University in Tokyo, Japan
- Dr. Tu is with the Department of Basic Dental Science, Faculty of Odonto-Stomatology, Ho Chi Minh Medicine and Pharmacy University in Ho Chi Minh City, Vietnam
| | - Keiji Moriyama
- Dr. Moriyama is with the Department of Maxillofacial Orthognathics, Graduate School of Tokyo Medical and Dental University in Tokyo, Japan
| | - Akira Toyofuku
- Drs. Suga, Nagamine, Tu, and Toyofuko are with the Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University in Tokyo, Japan
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Watanabe M, Takao C, Liu Z, Nayanar G, Suga T, Hong C, Tu TTH, Yoshikawa T, Takenoshita M, Motomura H, Nagamine T, Toyofuku A. The Effectiveness and Adverse Events of Amitriptyline and Aripiprazole in Very Elderly Patients With BMS. Front Pain Res 2022; 3:809207. [PMID: 35295804 PMCID: PMC8915585 DOI: 10.3389/fpain.2022.809207] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 01/24/2022] [Indexed: 11/13/2022] Open
Abstract
Burning mouth syndrome (BMS) is defined by chronic oral burning sensations without any corresponding abnormalities. Besides amitriptyline, aripiprazole has been reported as a possible medication to manage BMS. However, especially for elderly patients, the adverse events of these medications would be a problem. The aim of the present study was to investigate the differences in the effectiveness and adverse events of amitriptyline and aripiprazole in very elderly patients with BMS. This is a retrospective comparative study of 80 years old and older patients with BMS who were initially treated with amitriptyline or aripiprazole and who were new outpatients of our department from April 2017 to March 2020. All clinical data, including sex, age, comorbid physical diseases, comorbid psychiatric disorders, the prescribed doses (initial, maximum, and effective dose), prognosis, and adverse events, were collected from their medical charts. Each medication was selected considering their medical history. Amitriptyline was prescribed in 13 patients (11 women, 82.3 ± 2.1 years old) and aripiprazole was prescribed in 27 patients (26 women, 84.2 ± 3.8 years old). There were no significant between-group differences in sex, age, duration of illness, pain intensity, salivation, and psychiatric comorbidity at the first examination. Amitriptyline clinically improved more patients (7 patients, 53.8%) with the effective dose of 10 (7.5, 15.0) mg than aripiprazole (11 patients, 40.7%) of which the effective dose was 1.0 (0.5, 1.5) mg, although there were no significant between-group differences. The adverse events of amitriptyline were found in 9 patients (69.2%) and most patients had constipation (46.2%). For aripiprazole, 7 patients (25.9%) showed adverse events, most of them reported sleep disorder (11.1%). Amitriptyline had significantly longer duration taking medication (p = 0.021) and lower discontinuation (p = 0.043) despite of higher occurrence rate of adverse events (p = 0.015) compared to aripiprazole. These results suggest that both psychopharmacotherapies with a low dose of amitriptyline and aripiprazole are effective for the very elderly patients with BMS. Furthermore, aripiprazole may have some advantages in the adverse events compared to amitriptyline; however, the low dose amitriptyline monotherapy may have more benefit in the effectiveness and tolerability over prudent collaboration with primary physicians.
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Affiliation(s)
- Motoko Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- *Correspondence: Motoko Watanabe
| | - Chihiro Takao
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Zhenyan Liu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Gayatri Nayanar
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chaoli Hong
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Trang Thi Huyen Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- Department of Basic Dental Sciences, Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Tatsuya Yoshikawa
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Haruhiko Motomura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takahiko Nagamine
- Department of Psychiatric Internal Medicine, Sunlight Brain Research Center, Yamaguchi, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Tomita S, Nakanishi N, Ogata T, Suga T, Tsuji Y, Sakamoto A, Higuchi Y, Matoba S. Cavin-1 modulates BMP/Smad signaling through the interaction of Caveolin-1 with BMPRII in pulmonary artery endothelial cells. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Pulmonary hypertension (PH) is a progressive disease associated with poor outcomes. Caveolin-1 (Cav1) and Cavin-1 are components of caveolae, and Cav1 is identified as a related gene of pulmonary arterial hypertension (PAH). Gene mutations of bone morphogenetic protein type II receptor (BMPRII) is the most common cause of PAH. BMPRII is localized in caveolae and associates with Cav1. However, the role of the Caveolin-Cavin system on the BMP/Smad signaling and the PAH progression has not been well-known.
Purpose
Our study aims to investigate the relationship between Caveolin-Cavin system and BMP/Smad signaling pathway in pulmonary artery endothelial cells (PAECs). [Methods] Cav1 knockout mice were used to assess PH, and caveolae in PAECs were observed by electron microscope. After knocking down Cav1 and/or Cavin-1 in human PAECs (hPAECs) using siRNA, we evaluated the phosphorylation of Smad by Western blotting. Apoptosis was explored by flow cytometry. To assess the interaction between Cav1 and BMPRII, and the effect of Cavin-1 for this interaction and BMP/Smad signaling, we performed immunoprecipitation, Co-immunostaining, Proximal Ligation Assay (PLA), GST pulldown assay, and Western blotting.
Results
As in previous reports, Cav1 knockout mice exhibited PH with pulmonary vascular remodeling and right ventricular hypertrophy and PAECs isolated from Cav1 knockout mice showed caveolae disappearance. Cav1 knockdown in hPAECs reduced BMPRII at the plasma membrane and Smad 1/5/9 phosphorylation. Cav1 knockdown also significantly increased hypoxia-induced apoptosis in hPAECs. Co-immunostaining revealed that Cav1 was associated with BMPRII at the membrane of hPAECs. Cavin-1 inhibited the interaction of BMPRII with Cav1 and reduced BMPRII localization on the membrane of hPAECs. GST pulldown assay revealed that Cavin-1 and BMPRII were associated with Cav1 through the scaffolding domain in Cav1. These findings suggest that Cavin-1 and BMPRII are competitively associated with Cav1. Cavin-1 knockdown improved the interaction between Cav1 and BMPRII and inhibited both BMPRII reduction at the plasma membrane and Smad 1/5/9 dephosphorylation.
Conclusions
Cavin-1 affects the interaction of Cav1 with BMPRII at the plasma membrane and modulates BMP/Smad signaling in PAECs. The binding of Cavin-1 to Cav1 enhances the interaction between BMPR2 and Cav1, resulting in stabilization of BMPRII localization at the plasma membrane in PAECs and prevention of BMP/Smad signaling attenuation, which is important for PAH development.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- S Tomita
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - N Nakanishi
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - T Ogata
- Kyoto Prefectural University of Medicine, Department of Pathology and Cell Regulation, Graduate School of Medical Science, Kyoto, Japan
| | - T Suga
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - Y Tsuji
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - A Sakamoto
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - Y Higuchi
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
| | - S Matoba
- Kyoto Prefectural University of Medicine, Department of Cardiovascular Medicine, Kyoto, Japan
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Watanabe K, Watanabe M, Takao C, Hong C, Liu Z, Suga T, Tu TTH, Sakamoto J, Umezaki Y, Yoshikawa T, Takenoshita M, Uezato A, Motomura H, Kurabayashi T, Abiko Y, Toyofuku A. Clinical Characteristics of Predominantly Unilateral Oral Cenesthopathy With and Without Neurovascular Contact. Front Neurol 2021; 12:744561. [PMID: 34616358 PMCID: PMC8488299 DOI: 10.3389/fneur.2021.744561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 08/19/2021] [Indexed: 01/24/2023] Open
Abstract
Oral cenesthopathy (OC) is characterized by unusual oral discomfort without corresponding evidence, and it has often been categorized as "delusional disorder, somatic type". Regarding possible causative factors of OC, involvement of neurovascular contact (NVC) of the trigeminal nerve, which transmits not only pain but also thermal, tactile, and pressure sensations, has never been observed yet. This study aimed to investigate the relationship between clinical characteristics of unilateral OC and the presence of trigeminal nerve NVC. This is a retrospective comparative study that involved 48 patients having predominantly unilateral OC who visited the Psychosomatic Dentistry Clinic of Tokyo Medical and Dental University between April 2016 and February 2019. Magnetic resonance imaging was performed to assess NVC presence. The Oral Dysesthesia Rating Scale (Oral DRS) was used to assess the various oral sensations and functional impairments besides psychometric questionnaires. Clinical characteristics were retrospectively obtained from the patients' medical charts. NVC was present in 45.8% (22/48) of the patients. There was no significant difference in sex, age, psychiatric history, oral psychosomatic comorbidity, and psychometric questionnaire scores between patients with and without NVC. However, compared to the patients with NVC, the patients without NVC had significantly higher scores for overall subjective severity of OC symptoms (p = 0.008). Moreover, patients having predominantly unilateral OC without NVC showed significantly higher scores in symptom severity and functional impairment of the following parameters: movement (p = 0.030), work (p = 0.004), and social activities (p = 0.010). In addition, compared with the patients with NVC, the patients without NVC showed significantly higher averages of the total symptom severity scale (SSS) and functional impairment scale (FIS) scores in the Oral DRS (p = 0.015 and p = 0.031, respectively). Furthermore, compared with the patients with NVC, the patients without NVC had significantly higher numbers of corresponding symptoms in both the SSS and FIS (p = 0.041 and p = 0.007, respectively). While NVC may be involved in the indescribable subtle OC symptoms, more complex mechanisms may also exist in OC patients without NVC, which yield varying and more unbearable oral symptoms.
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Affiliation(s)
- Kazuya Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.,Department of Physical Therapy, Shimonoseki Nursing and Rehabilitation School, Yamaguchi, Japan
| | - Motoko Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chihiro Takao
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chaoli Hong
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Zhenyan Liu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Trang Thi Huyen Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.,Department of Basic Dental Sciences, Faculty of Odonto-Stomatology, University of Medicine and Pharmacy, Ho Chi Minh City, Vietnam
| | - Junichiro Sakamoto
- Department of Oral and Maxillofacial Radiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yojiro Umezaki
- Section of Geriatric Dentistry, Department of General Dentistry, Fukuoka Dental College, Fukuoka, Japan
| | - Tatsuya Yoshikawa
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akihito Uezato
- School of Health and Welfare, International University of Health and Welfare, Tochigi, Japan
| | - Haruhiko Motomura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tohru Kurabayashi
- Department of Oral and Maxillofacial Radiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yoshihiro Abiko
- Division of Oral Medicine and Pathology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Suga T, Tu TTH, Sakamoto J, Toyofuku A. A case of vestibular schwannoma with oral burning sensation: surgical complication or burning mouth syndrome? Biopsychosoc Med 2021; 15:13. [PMID: 34425849 PMCID: PMC8381559 DOI: 10.1186/s13030-021-00215-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 08/07/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Despite improvements in surgical techniques, the removal of vestibular schwannoma is related to some complications. Recovery from surgical complications of vestibular schwannoma is often difficult and complications sometimes lead to permanent deficits. However, treatable trigeminal symptoms may be missed in atypical cases. CASE PRESENTATION A 46-year-old woman complained about burning sensation on her tongue and maxilla for four years before her first visit to our clinic. She visited the neurosurgery department in a university hospital because her facial pain and burning sensation of her tongue were suddenly aggravated. She was diagnosed with vestibular schwannoma and tumour resection was performed. However, her oral pain persisted after surgery. Two months before the initial visit to our clinic, the oral pain became more severe than ever before. When the patient visited a psychiatrist due to a panic attack, the psychiatrist diagnosed her as having somatic symptom disorder and depression and referred her to our clinic. Based on the characteristics of the pain, she was diagnosed as burning mouth syndrome and treated for the same. Within 1.5 months, the pain and burning sensation of the tongue and maxilla almost completely remitted with low dose amitriptyline. CONCLUSIONS Our case suggests that there are exceptional cases in which burning mouth syndrome and vestibular schwannoma occur simultaneously. Burning pain after vestibular schwannoma surgery cannot always be considered a complication of surgery.
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Affiliation(s)
- Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan.
| | - Trang T H Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
| | - Junichiro Sakamoto
- Department of Oral and Maxillofacial Radiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
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Kawasaki K, Sugawara S, Watanabe K, Hong C, Tu TTH, Watanabe T, Sakamoto J, Yoshino N, Suga T, Mikuzuki L, Takenoshita M, Takada S, Kurabayashi T, Toyofuku A. Differences in the Clinical Characteristics of Persistent Idiopathic Facial Pain (Atypical Odontalgia) Patients with or Without Neurovascular Compression of the Trigeminal Nerve. Pain Med 2021; 21:814-821. [PMID: 32040150 PMCID: PMC7139210 DOI: 10.1093/pm/pnz300] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Background Persistent idiopathic facial pain (PIFP) is the unexplained pain along the territory of the trigeminal nerve, including nonorganic tooth pain called atypical odontalgia (AO). Though PIFP is debilitating to patients’ livelihood and well-being, its pathophysiology remains poorly understood. Although neurovascular compression (NVC) of the trigeminal nerve is known to be associated with trigeminal neuralgia (TN), the relationship between NVC and other orofacial pains has not been fully elucidated. Methods In this study, we investigated the differences in the characteristics of PIFP (primarily AO) patients in the presence or absence of NVC. A retrospective analysis was performed on data from 121 consecutive patients who had been diagnosed with unilateral PIFP according to the criteria of the International Classification of Headache Disorders (ICHD)–3 and underwent magnetic resonance imaging scans of the head. Results In the group without NVC, characteristic findings were significant for psychiatric morbidity, somatization, and pain disability, when compared with the group with NVC. Furthermore, the group without NVC exhibited significant headache, noncardiac chest pain, shortness of breath, and pain catastrophizing. Conclusions These results suggest that PIFP patients can be divided into two groups: one consistent with a neuropathic pain phenotype when NVC is present and a functional somatic symptom phenotype when presenting without NVC. Our findings may enable a more precise understanding of pathophysiology of PIFP and lead to better treatment strategies.
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Affiliation(s)
- Kaoru Kawasaki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.,Department of Oral Surgery, School of Dentistry, Ohu University, Koriyama Fukushima, Japan
| | - Shiori Sugawara
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kazuya Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chaoli Hong
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Trang Thi Huyen Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takeshi Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Junichiro Sakamoto
- Department of Oral and Maxillofacial Radiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Norio Yoshino
- Department of Oral and Maxillofacial Radiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Lou Mikuzuki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Satoshi Takada
- Department of Oral Surgery, School of Dentistry, Ohu University, Koriyama Fukushima, Japan
| | - Tohru Kurabayashi
- Department of Oral and Maxillofacial Radiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Suga T, Takenoshita M, Tu TTH, Sugawara T, Kirimura S, Toyofuku A. A case of vestibular schwannoma mimicking burning mouth syndrome. Biopsychosoc Med 2021; 15:7. [PMID: 33743774 PMCID: PMC7981949 DOI: 10.1186/s13030-021-00209-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 03/12/2021] [Indexed: 11/17/2022] Open
Abstract
Background An oral burning sensation with unidentified cause in patients with preexisting psychosocial conditions is usually diagnosed as burning mouth syndrome. However, unexpected organic lesions may be detected in rare cases. Case presentation A 35-year-old woman had chief complaints of a burning sensation and numbness of the right side of the lip and tongue, as well as a dry sensation of the mouth with a taste disturbance of the right side of the tongue. The symptoms were continuous and did not show any daily fluctuations. The symptoms started without any recognizable triggering factor six months before her first visit to our clinic,. No abnormality was detected in her mouth. MRI images revealed an approximately 30 × 30 mm well-defined mass localized in the right cerebropontine angle compressing the trigeminal nerve, which was diagnosed as schwannoma of the right auditory nerve. Conclusions It is important for clinicians to consider the possibility of brain tumors in their differential diagnosis of BMS. Although it is not always easy to eliminate all diseases that may cause an oral burning sensation in patients with BMS-like symptoms, more attention and careful examination based on the patient’s psychosomatic background features and other possible causes are needed to rule out organic diseases.
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Affiliation(s)
- Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan.
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
| | - Trang T H Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
| | - Takashi Sugawara
- Department of Neurosurgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Susumu Kirimura
- Division of Surgical Pathology, Tokyo Medical and Dental University Hospital, Tokyo, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, 113-8510, Tokyo, Japan
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Suga T, Tu TTH, Nagamine T, Toyofuku A. Careful use of clonazepam and alpha lipoid acid in burning mouth syndrome treatment. Oral Dis 2021; 28:846-847. [PMID: 33440037 PMCID: PMC9291469 DOI: 10.1111/odi.13776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 01/08/2021] [Indexed: 11/30/2022]
Affiliation(s)
- Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Trang T H Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takahiko Nagamine
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.,Department of Psychiatric Internal Medicine, Sunlight Brain Research Center, Yamaguchi, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Tu TTH, Watanabe M, Suga T, Hong C, Takao C, Takenoshita M, Motomura H, Toyofuku A. Personality Traits in Burning Mouth Syndrome Patients With and Without a History of Depression. Front Psychiatry 2021; 12:659245. [PMID: 34393842 PMCID: PMC8358652 DOI: 10.3389/fpsyt.2021.659245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 06/24/2021] [Indexed: 11/13/2022] Open
Abstract
Objectives: So far, the strong link between neuroticism, chronic pain, and depression has been well-documented in literatures. Some suggested that they might share etiological factors, thus resulting in overlapping constructs. However, such effect has never been tested in burning mouth syndrome (BMS) patients, a complex phenomenon influenced by both neuropathic and psychopathological factors. We aim to clarify how personality affects individual's pain and pain-related experiences. Methods: Two hundred forty-eight patients with BMS provided demographic information and psychiatric history; completed Ten-Item Personality Inventory, a Visual Analog Scale of pain, and McGill Pain Questionnaire; and provided adequate parameters of depressive state, catastrophizing thinking, and central sensitization. Results: BMS patients with depression history suffered more severe clinical symptoms and scored higher in neuroticism and less in openness and extraversion than did those without psychiatric diagnoses. After age, sex, and duration of pain were controlled, neuroticism in BMS patients with depression correlates with affective dimension of pain. Instead, if psychiatric history is absent, neuroticism correlates with sensory dimension and pain intensity. In both groups, higher neuroticism, unlike other personality facets, contributed to a more severe clinical condition. Conclusion: Of the five traits, neuroticism appears to be the most crucial dimension associated with the pain symptoms and patient's conditions. This study implies that management of pain must extend beyond solely providing pain-relieving medication and must require a holistic and multidisciplinary approach.
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Affiliation(s)
- Trang Thi Huyen Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Motoko Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chaoli Hong
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chihiro Takao
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Haruhiko Motomura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Suga T, Tu TTH, Takenoshita M, Mikuzuki L, Umezaki Y, Shimamoto H, Michi Y, Hong C, Abiko Y, Ikeda T, Uzawa N, Harada H, Toyofuku A. Case Report: Hidden Oral Squamous Cell Carcinoma in Oral Somatic Symptom Disorder. Front Psychiatry 2021; 12:651871. [PMID: 33868058 PMCID: PMC8046933 DOI: 10.3389/fpsyt.2021.651871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 03/09/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Burning mouth syndrome (BMS) is a common condition of predominant oral pain without evident cause, that maxillofacial surgeons and otolaryngologists often refer to psychiatrists as somatic symptom disorder. In very rare cases, its typical burning symptom mimics those of other diseases in which serious fatal comorbidities may be missed. We encountered three rare cases of oral squamous cell carcinoma (OSCC) with the first symptom of burning tongue. Case Presentation: Case 1: A 68-year-old woman had burning pain on the left lingual margin for 8 years. Antidepressant treatment was not efficacious. Cytology and biopsy revealed OSCC. Case 2: A 70-year-old man had burning sensation and paralysis of the tongue for 6 months. Magnetic resonance imaging (MRI) revealed a 37 × 23-mm mass under the floor of the mouth and enlargement of lymph nodes on both sides. Case 3: A 90-year-old man had burning sensation of the tongue for 1 year. MRI revealed a 12 × 12-mm mass on the mandible with bone absorption. Conclusion: This case series suggests that psychiatrists must always be careful in regarding BMS as somatic symptom disorder and be cautious of the possibility of OSCC, especially in elderly patients.
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Affiliation(s)
- Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Trang Thi Huyen Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Lou Mikuzuki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yojiro Umezaki
- Section of Geriatric Dentistry, Department of General Dentistry, Fukuoka Dental College, Fukuoka, Japan
| | - Hiroaki Shimamoto
- Division of Oral Health Sciences, Department of Oral and Maxillofacial Surgery, Oral Restitution, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yasuyuki Michi
- Division of Oral Health Sciences, Department of Oral and Maxillofacial Surgery, Oral Restitution, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chaoli Hong
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yoshihiro Abiko
- Division of Oral Medicine and Pathology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - Tohru Ikeda
- Department of Oral Pathology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Narikazu Uzawa
- Department of Oral and Maxillofacial Surgery 2, Graduate School of Dentistry, Osaka University, Suita, Japan
| | - Hiroyuki Harada
- Division of Oral Medicine and Pathology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Watanabe M, Hong C, Liu Z, Takao C, Suga T, Tu TTH, Yoshikawa T, Takenoshita M, Sato Y, Higashihori N, Moriyama K, Motomura H, Toyofuku A. Case Report: Iatrogenic Dental Progress of Phantom Bite Syndrome: Rare Cases With the Comorbidity of Psychosis. Front Psychiatry 2021; 12:701232. [PMID: 34366932 PMCID: PMC8334004 DOI: 10.3389/fpsyt.2021.701232] [Citation(s) in RCA: 4] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 06/22/2021] [Indexed: 11/13/2022] Open
Abstract
Introduction: Phantom bite syndrome (PBS) is considered as the preoccupation with dental occlusion and the continual inability to adapt to changed occlusion. These patients constantly demand occlusal corrections and undergo extensive and excessive dental treatments. We present three cases with PBS-suspected iatrogenic concerns and the attribution to underlying psychosis. Case Presentation: A 70-year-old female demanded orthodontic retreatment and complained of tightness and cramped sensation of teeth in the oral cavity, uncomfortable occlusion, and pain in her neck and legs that she was convinced was induced by orthodontic treatment. However, even earlier than the orthodontic treatment, she had kept doctor shopping for over 35 years, not merely dentists but also psychiatrists, neurologists, and so on; she was diagnosed with bipolar disorder. A 48-year-old female complained of malaligned improper occlusion and demanded occlusal adjustment. These symptoms occurred in the absence of a dental trigger and were worsened by orthodontic treatment. She underwent psychiatric treatment for 15 years with a diagnosis of bipolar disorder. A 38-year-old female, who had a history of schizophrenia for over 20 years, complained of occlusal discomfort and revisited with a complaint of abnormal occlusion due to excessive dental procedures. In the last two cases, requests for dental procedures had reduced owing to the collaboration between the psychiatrists and dentists. All the cases first visited our clinic following a succession of dental visits. They were strongly convinced that occlusal correction was the only solution to their symptoms, including the symptoms of discomfort in other body parts. Their misleading perceptions were uncorrectable, and repeated dental treatments exacerbated their complaints. Moreover, the dentists overlooked the psychotic histories of the patients, while the comorbid psychosis resulted in a strict demand for dental treatment by the patients. Conclusions: The presented PBS cases with psychosis suggest that repeated dental treatments and comorbid psychosis exacerbate PBS. Moreover, their persistent demands reflecting comorbid psychosis led dentists to perform numerous procedures. Early detection of underlying psychosis and the prompt collaboration between psychiatrists and dentists are integral to help prevent complications in PBS cases with psychosis.
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Affiliation(s)
- Motoko Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chaoli Hong
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Zhenyan Liu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chihiro Takao
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Trang Thi Huyen Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.,Department of Basic Dental Sciences, Faculty of Odonto-Stomatology, University of Medicine and Pharmacy, Ho Chi Minh City, Vietnam
| | - Tatsuya Yoshikawa
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yusuke Sato
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Norihisa Higashihori
- Department of Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Keiji Moriyama
- Department of Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Haruhiko Motomura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Suga T, Tu TTH, Takenoshita M, Higashihori N, Kabasawa Y, Ono T, Moriyama K, Toyofuku A. Psychosocial indication for orthognathic surgery in patients with psychiatric comorbidities. Psychiatry Clin Neurosci 2020; 74:621-623. [PMID: 32738002 DOI: 10.1111/pcn.13125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/17/2020] [Accepted: 07/27/2020] [Indexed: 12/01/2022]
Affiliation(s)
- Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Trang Thi Huyen Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Norihisa Higashihori
- Department of Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuji Kabasawa
- Department of Oral Care for Systemic Health Support, Graduate School of Health Care Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takashi Ono
- Department of Orthodontic Science, Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Keiji Moriyama
- Department of Maxillofacial Orthognathics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Suga T, Takenoshita M, Toyofuku A. A case of an elderly patient with persistent idiopathic facial pain related to dental implants successfully treated with mirtazapine. Psychogeriatrics 2020; 20:769-770. [PMID: 32162411 DOI: 10.1111/psyg.12540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 02/19/2020] [Accepted: 02/23/2020] [Indexed: 11/27/2022]
Affiliation(s)
- Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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15
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Umezaki Y, Watanabe M, Shinohara Y, Sugawara S, Kawasaki K, Tu TTH, Watanabe T, Suga T, Miura A, Takenoshita M, Sato Y, Minami I, Oyama J, Toriihara A, Yoshikawa T, Naito T, Motomura H, Toyofuku A. Comparison of Cerebral Blood Flow Patterns in Patients with Phantom Bite Syndrome with Their Corresponding Clinical Features. Neuropsychiatr Dis Treat 2020; 16:2277-2284. [PMID: 33116526 PMCID: PMC7547763 DOI: 10.2147/ndt.s262892] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 09/11/2020] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Phantom bite syndrome (PBS) is characterized by an uncomfortable sensation during occlusion without any evident abnormality. A recent case-control study with single-photon emission computed tomography (SPECT) using 99mTc-ethyl cysteinate dimer could not find the specific features of regional cerebral blood flow (rCBF), which might be due to the heterogeneity of PBS. We analyzed the brain images of PBS corresponding to the clinical features by studying PBS subgroups. METHODS This study contributes to elucidating the pathophysiology of PBS by evaluating regional brain perfusion on SPECT and its clinical features. We performed SPECT using 99mTc-ethyl cysteinate dimer in 44 patients with PBS. The SPECT images were analyzed qualitatively and quantitatively. RESULTS Asymmetrical rCBF patterns were detected, corresponding to symptom laterality. Patients with PBS with right-side symptoms showed right-side-predominant rCBF asymmetry in the parietal region and left-side-predominant rCBF asymmetry in the thalamus, and vice versa. Moreover, the analysis of the association between rCBF and patient behaviors revealed that patients who blamed their dentists for their symptoms tended to have a symmetrical rCBF pattern. CONCLUSION Patients with PBS showed blood flow imbalance in the thalamus and parietal region corresponding to symptom laterality. There are two types of symmetrical and asymmetrical rCBF patterns in the pathophysiology of PBS despite similar clinical manifestations.
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Affiliation(s)
- Yojiro Umezaki
- Section of Geriatric Dentistry, Department of General Dentistry, Fukuoka Dental College, Fukuoka 814-0193, Japan
| | - Motoko Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Yukiko Shinohara
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Shiori Sugawara
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Kaoru Kawasaki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Trang T H Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Takeshi Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Anna Miura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Yusuke Sato
- Department of Gerontology and Gerodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Ichiro Minami
- Department of Removable Partial Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Jun Oyama
- Department of Diagnostic Radiology and Nuclear Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Akira Toriihara
- Department of Diagnostic Radiology and Nuclear Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Tatsuya Yoshikawa
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Toru Naito
- Section of Geriatric Dentistry, Department of General Dentistry, Fukuoka Dental College, Fukuoka 814-0193, Japan
| | - Haruhiko Motomura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8548, Japan
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16
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Suga T, Takenoshita M, Toyofuku A. Medical comorbidities of patients with burning mouth syndrome. Oral Dis 2019; 26:238-239. [PMID: 31466124 DOI: 10.1111/odi.13186] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 08/25/2019] [Indexed: 01/03/2023]
Affiliation(s)
- Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Shinohara Y, Umezaki Y, Minami I, Watanabe M, Miura A, Mikutsuki L, Kawasaki K, Sugawara S, Trang TTH, Suga T, Watanabe T, Yoshikawa T, Takenoshita M, Motomura H, Toyofuku A. Comorbid depressive disorders and left-side dominant occlusal discomfort in patients with phantom bite syndrome. J Oral Rehabil 2019; 47:36-41. [PMID: 31398263 PMCID: PMC6916626 DOI: 10.1111/joor.12872] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 12/11/2018] [Accepted: 08/05/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND Phantom bite syndrome (PBS) is characterised by occlusal discomfort without corresponding dental abnormalities. Despite repeated, failed dental treatments, patients with PBS persist in seeking bite correction. PBS has been regarded as a mental disorder. However, we have reported that PBS patients with a dental trigger tend to have less psychiatric history than those without. Hence, the symptoms of PBS cannot be explained by a mental disorder alone, and it is unclear if mental disorders affect occlusal sensation. OBJECTIVE To elucidate the pathophysiology of PBS, we analysed the dental history, PBS symptom laterality and psychiatric history of patients. METHODS In this retrospective study, we reviewed outpatients with PBS who presented at our clinic between April 2012 and March 2017. Their medical records were reviewed for demographic data, medical history and laterality of occlusal discomfort. RESULTS Approximately half of the 199 enrolled patients had bilateral occlusal discomfort. In the others, the side with occlusal discomfort generally tended to be the one that had received dental treatment. There was no significant relationship between the side chiefly affected by occlusal discomfort and whether dental treatment had been received; however, the affected side differed depending on whether the patient had comorbid psychiatric disorders (P = .041). CONCLUSIONS The distributions of the side with symptoms of PBS were different between those with and without comorbid psychiatric disorders, suggesting that psychiatric disorders might affect occlusal sensation due to a subtle dysfunction in brain areas central to sensory integration. Central dysfunction might play an important role in PBS.
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Affiliation(s)
- Yukiko Shinohara
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yojiro Umezaki
- Section of Geriatric Dentistry, Department of General Dentistry, Fukuoka Dental College, Fukuoka, Japan
| | - Ichiro Minami
- Department of Removable Partial Prosthodontics, Masticatory Function Rehabilitation, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Motoko Watanabe
- Department of Oral and Maxillofacial Radiology, Tokyo Dental College, Tokyo, Japan
| | - Anna Miura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Lou Mikutsuki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kaoru Kawasaki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shiori Sugawara
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tu Thi Hyen Trang
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takeshi Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tatsuya Yoshikawa
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Haruhiko Motomura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Tu TTH, Miura A, Shinohara Y, Mikuzuki L, Kawasaki K, Sugawara S, Suga T, Watanabe T, Aota Y, Umezaki Y, Takenoshita M, Toyofuku A. Pharmacotherapeutic outcomes in atypical odontalgia: determinants of pain relief. J Pain Res 2019; 12:831-839. [PMID: 30881094 PMCID: PMC6398971 DOI: 10.2147/jpr.s188362] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Objectives There has been considerable research which has focused on clarifying the origin of pain in patients with atypical odontalgia (AO), also known as “idiopathic toothache”, and on identifying effective treatment, but there has been limited success so far. In this study, we assessed the outcomes of treatment and attempted to identify factors that could account for pain remission in patients with AO. Patients and methods Data for 165 patients diagnosed with AO from June 2015 to August 2017 were retrospectively reviewed. The patients’ sex, age, duration of pain, and psychiatric history were collected, along with information on pain intensity, depressive status, and catastrophizing scores. Responses at 4 and 16 weeks from the start of treatment were observed. The associations between potentially associated factors and outcome were investigated using Bayesian model averaging. Results A 30% reduction in pain was reported by 38 patients (46.3%) at 4 weeks and by 54 patients (65.9%) at 16 weeks. The pain intensity decreased as the depression and catastrophizing score improved; all of the changes were statistically significant (P<0.001). Four elements, that is, patient sex, depression score at baseline, pain score at 4 weeks, and change in the catastrophizing score, explained 52.5% of the variation in final outcome between individual patients. Conclusion Our findings confirm the efficacy of tricyclic antidepressants (TCAs) as a treatment for AO and indicate that other medications, especially aripiprazole used in combination with a TCA, may be useful. A considerable number of patients, especially women, those with lower levels of depression at baseline, and those who responded to 4 weeks of treatment, achieved pain relief.
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Affiliation(s)
- Trang T H Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan,
| | - Anna Miura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan,
| | - Yukiko Shinohara
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan,
| | - Lou Mikuzuki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan,
| | - Kaoru Kawasaki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan,
| | - Shiori Sugawara
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan,
| | - Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan,
| | - Takeshi Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan,
| | - Yuma Aota
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan,
| | - Yojiro Umezaki
- Department of Geriatric Dentistry, Fukuoka Dental College, Fukuoka, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan,
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan,
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Tu TTH, Takenoshita M, Matsuoka H, Watanabe T, Suga T, Aota Y, Abiko Y, Toyofuku A. Current management strategies for the pain of elderly patients with burning mouth syndrome: a critical review. Biopsychosoc Med 2019; 13:1. [PMID: 30733824 PMCID: PMC6357406 DOI: 10.1186/s13030-019-0142-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 01/23/2019] [Indexed: 12/18/2022] Open
Abstract
Burning Mouth Syndrome (BMS), a chronic intraoral burning sensation or dysesthesia without clinically evident causes, is one of the most common medically unexplained oral symptoms/syndromes. Even though the clinical features of BMS have been astonishingly common and consistent throughout the world for hundreds of years, BMS remains an enigma and has evolved to more intractable condition. In fact, there is a large and growing number of elderly BMS patients for whom the disease is accompanied by systemic diseases, in addition to aging physical change, which makes the diagnosis and treatment of BMS more difficult. Because the biggest barrier preventing us from finding the core pathophysiology and best therapy for BMS seems to be its heterogeneity, this syndrome remains challenging for clinicians. In this review, we discuss currently hopeful management strategies, including central neuromodulators (Tricyclic Antidepressants - TCAs, Serotonin, and Norepinephrine Reuptake Inhibitors - SNRIs, Selective Serotonin Reuptake Inhibitors - SSRIs, Clonazepam) and solutions for applying non-pharmacology approaches. Moreover, we also emphasize the important role of patient education and anxiety management to improve the patients’ quality of life. A combination of optimized medication with a short-term supportive psychotherapeutic approach might be a useful solution.
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Affiliation(s)
- Trang T H Tu
- 1Department of Psychosomatic Dentistry, Graduate School of Medical and Dental sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo, 113-8549 Japan
| | - Miho Takenoshita
- 1Department of Psychosomatic Dentistry, Graduate School of Medical and Dental sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo, 113-8549 Japan
| | - Hirofumi Matsuoka
- 2Division of Disease Control and Molecular Epidemiology, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - Takeshi Watanabe
- 1Department of Psychosomatic Dentistry, Graduate School of Medical and Dental sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo, 113-8549 Japan
| | - Takayuki Suga
- 1Department of Psychosomatic Dentistry, Graduate School of Medical and Dental sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo, 113-8549 Japan
| | - Yuma Aota
- 1Department of Psychosomatic Dentistry, Graduate School of Medical and Dental sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo, 113-8549 Japan
| | - Yoshihiro Abiko
- 3Division of Oral Medicine and Pathology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - Akira Toyofuku
- 1Department of Psychosomatic Dentistry, Graduate School of Medical and Dental sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo, 113-8549 Japan
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Suga T, Takenoshita M, Watanabe T, Tu TT, Mikuzuki L, Hong C, Miura K, Yoshikawa T, Nagamine T, Toyofuku A. Therapeutic Dose of Amitriptyline for Older Patients with Burning Mouth Syndrome. Neuropsychiatr Dis Treat 2019; 15:3599-3607. [PMID: 31920319 PMCID: PMC6941698 DOI: 10.2147/ndt.s235669] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 12/13/2019] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To assess the therapeutic dose and safety of amitriptyline and the outcome following treatment with amitriptyline among older patients with burning mouth syndrome (BMS). METHODS 187 consecutive patients were prescribed amitriptyline as a first-line medication from April 2016 to September 2018 and followed-up for >1 month. Patients were divided into 3 groups: group 1, 113 patients aged <65 years; group 2, 52 patients aged between 65 and 74 years; and group 3, 22 patients aged 75 years or older. The visual analog scale (VAS), Pain Catastrophizing Scale (PCS), Somatic Symptom Scale-8 (SSS-8), Patient Global Impression of Change (PGIC), and Short-form McGill Pain Questionnaire (SF-MPQ) were used for analysis. RESULTS Thirty-two patients (17 in group 1, 10 in group 2, and 5 in group 3) stopped taking amitriptyline due to side effects. There were no differences among the groups with respect to sex; scores of VAS, PCS, and SSS-8; and drop-out ratio. There were no significant differences in the VAS, PCS, and PGIC scores among the groups after 1 month. The mean daily dose after 1 month was 20.4 ± 8.6 mg in group 1, 17.3 ± 8.7 mg in group 2, and 13.2 ± 5.8 mg in group 3; this difference was significant (p value = 0.003). About 76% of patients showed improvements in their symptoms (PGIC ≥ 3). About 90% of patients reported side effects. No serious side effects occurred. CONCLUSION The therapeutic dose of amitriptyline may be lower for older BMS patients than for younger patients.
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Affiliation(s)
- Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takeshi Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Trang Th Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Lou Mikuzuki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chaoli Hong
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kazuhito Miura
- Department of Gerodontology, Division of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Hokkaido, Japan
| | - Tatsuya Yoshikawa
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takahiko Nagamine
- Department of Psychiatric Internal Medicine, Sunlight Brain Research Center, Yamaguchi, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Suga T, Watanabe T, Aota Y, Nagamine T, Toyofuku A. Burning mouth syndrome: The challenge of an aging population. Geriatr Gerontol Int 2018; 18:1649-1650. [DOI: 10.1111/ggi.13548] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 09/21/2018] [Accepted: 09/27/2018] [Indexed: 11/29/2022]
Affiliation(s)
- Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental SciencesTokyo Medical and Dental University Tokyo Japan
| | - Takeshi Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental SciencesTokyo Medical and Dental University Tokyo Japan
| | - Yuma Aota
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental SciencesTokyo Medical and Dental University Tokyo Japan
| | - Takahiko Nagamine
- Department of Psychiatric Internal MedicineSunlight Brain Research Center Yamaguchi Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental SciencesTokyo Medical and Dental University Tokyo Japan
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Kawasaki K, Nagamine T, Watanabe T, Suga T, Tu TTH, Sugawara S, Mikuzuki L, Miura A, Shinohara Y, Yoshikawa T, Takenoshita M, Toyofuku A. An increase in salivary flow with amitriptyline may indicate treatment resistance in burning mouth syndrome. Asia Pac Psychiatry 2018; 10:e12315. [PMID: 29575764 DOI: 10.1111/appy.12315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 12/12/2017] [Accepted: 02/12/2018] [Indexed: 11/27/2022]
Affiliation(s)
- Kaoru Kawasaki
- Department of Psychosomatic Dentistry, Tokyo Medical and Dental University Graduate School of Medical and Dental Science, Tokyo, Japan
| | | | - Takeshi Watanabe
- Department of Psychosomatic Dentistry, Tokyo Medical and Dental University Graduate School of Medical and Dental Science, Tokyo, Japan
| | - Takayuki Suga
- Department of Psychosomatic Dentistry, Tokyo Medical and Dental University Graduate School of Medical and Dental Science, Tokyo, Japan
| | - Trang T H Tu
- Department of Psychosomatic Dentistry, Tokyo Medical and Dental University Graduate School of Medical and Dental Science, Tokyo, Japan
| | - Shiori Sugawara
- Department of Psychosomatic Dentistry, Tokyo Medical and Dental University Graduate School of Medical and Dental Science, Tokyo, Japan
| | - Lou Mikuzuki
- Department of Psychosomatic Dentistry, Tokyo Medical and Dental University Graduate School of Medical and Dental Science, Tokyo, Japan
| | - Anna Miura
- Department of Psychosomatic Dentistry, Tokyo Medical and Dental University Graduate School of Medical and Dental Science, Tokyo, Japan
| | - Yukiko Shinohara
- Department of Psychosomatic Dentistry, Tokyo Medical and Dental University Graduate School of Medical and Dental Science, Tokyo, Japan
| | - Tatsuya Yoshikawa
- Department of Psychosomatic Dentistry, Tokyo Medical and Dental University Graduate School of Medical and Dental Science, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Tokyo Medical and Dental University Graduate School of Medical and Dental Science, Tokyo, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Tokyo Medical and Dental University Graduate School of Medical and Dental Science, Tokyo, Japan
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Ueno H, Suga T, Miyake Y, Takao K, Tanaka T, Misaki J, Otsuka M, Nagano A, Isaka T. Specific adaptations of patellar and Achilles tendons in male sprinters and endurance runners. Transl Sports Med 2018. [DOI: 10.1002/tsm2.21] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- H. Ueno
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Japan
| | - T. Suga
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Japan
| | - Y. Miyake
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Japan
| | - K. Takao
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Japan
| | - T. Tanaka
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Japan
| | - J. Misaki
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Japan
| | - M. Otsuka
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Japan
| | - A. Nagano
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Japan
| | - T. Isaka
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Japan
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Umezaki Y, Miura A, Shinohara Y, Mikuzuki L, Sugawara S, Kawasaki K, Tu TT, Watanabe T, Suga T, Watanabe M, Takenoshita M, Yoshikawa T, Uezato A, Nishikawa T, Hoshiko K, Naito T, Motomura H, Toyofuku A. Clinical characteristics and course of oral somatic delusions: a retrospective chart review of 606 cases in 5 years. Neuropsychiatr Dis Treat 2018; 14:2057-2065. [PMID: 30147319 PMCID: PMC6095116 DOI: 10.2147/ndt.s167527] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVE Oral cenesthopathy is characterized by foreign body sensations without medical and dental evidence for them. It is thought to be a rare disease in psychiatry, but many patients are visiting dental clinics seeking treatment to remove a foreign body. Even though the features of oral cenesthopathy might be different between a psychiatric clinic and a dental clinic, there has been no clinic-statistical study from dentists. In this study, we report a clinico-statistical study of patients with oral cenesthopathy in dentistry. METHODS This is a retrospective chart review of 606 outpatients with oral cenesthopathy in Tokyo Medical and Dental University from April 2010 through to March 2015. RESULTS A total of 159 male and 447 female patients were included in this study. The mean age was 62.08 years, and female patients were older than male patients. The trigger of the dental treatment and the acute phase of depression at the onset were significantly related (p=0.037). Only 128 patients (36%) had clinically significant improvement after 6 months of pharmacotherapy. No history of psychiatric disorders (odds ratio [OR] 0.479 [95% confidence interval {CI}: 0.262-0.875], p=0.017) and longer duration of illness (>18 months) (OR 2.626 [95% CI: 1.437-4.799], p=0.002) were significant factors for clinical outcomes. CONCLUSION Patients with oral cenesthopathy in our clinic were predominantly elderly female patients. Dental treatment in the acute phase of depression might be a risk factor for oral cenesthopathy. Therefore, comprehending the situation of psychiatric disorder and obtaining adequate informed consent might be required to prevent the trouble concerning oral cenesthopathy.
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Affiliation(s)
- Yojiro Umezaki
- Section of Geriatric Dentistry, Department of General Dentistry, Fukuoka Dental College, Fukuoka, Japan,
| | - Anna Miura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yukiko Shinohara
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Lou Mikuzuki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shiori Sugawara
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kaoru Kawasaki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Trang Th Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takeshi Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Motoko Watanabe
- Department of Oral and Maxillofacial Radiology, Tokyo Dental College, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tatsuya Yoshikawa
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akihito Uezato
- Department of Psychiatry and Behavioral Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Toru Nishikawa
- Department of Psychiatry and Behavioral Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ken Hoshiko
- Department of Pharmacy, Dental Hospital, Tokyo Medical and Dental University, Tokyo, Japan
| | - Toru Naito
- Section of Geriatric Dentistry, Department of General Dentistry, Fukuoka Dental College, Fukuoka, Japan,
| | - Haruhiko Motomura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Miura A, Tu TTH, Shinohara Y, Mikuzuki L, Kawasaki K, Sugawara S, Suga T, Watanabe T, Watanabe M, Umezaki Y, Yoshikawa T, Motomura H, Takenoshita M, Maeda H, Toyofuku A. Psychiatric comorbidities in patients with Atypical Odontalgia. J Psychosom Res 2018; 104:35-40. [PMID: 29275783 DOI: 10.1016/j.jpsychores.2017.11.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/24/2017] [Accepted: 11/03/2017] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Atypical Odontalgia (AO) is a condition characterized by tooth pain with no apparent cause. Although psychiatric comorbidity seems to be very common, it has rarely been studied. To clarify the influence of psychiatric comorbidity on the clinical features in patients with AO, we retrospectively evaluated their examination records. METHODS Clinical features and psychiatric diagnoses of 383 patients with AO were investigated by reviewing patients' medical records and referral letters. Psychiatric diagnoses were categorized according to the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5). We also analyzed visual analogue scale (VAS), self-rating depression scale (SDS), and the short-form McGill pain questionnaire (SF-MPQ) scores. RESULTS Of the 383 patients with AO, 177 (46.2%) had comorbid psychiatric disorders. The most common were depressive disorders (15.4%) and anxiety disorders (10.1%). Serious psychotic disorders such as bipolar disorder (3.0%) and schizophrenia (1.8%) were rare. Dental trigger of AO was reported in 217 (56.7%) patients. There were no significant correlations between psychiatric comorbidities and most of the demographic features. Higher VAS and SDS scores, higher frequency of sleep disturbance, and higher ratings of "Fearful" and "Punishing-cruel" descriptors of the SF-MPQ were found in patients with psychiatric comorbidity. CONCLUSIONS About half of AO patients had comorbid psychiatric disorders. Dental procedures are not necessarily causative factors of AO. In AO patients with comorbid psychiatric disorders, pain might have a larger emotional component than a sensory one. VAS, SDS, and SF-MPQ scores might aid in the noticing of underlying comorbid psychiatric disorders in AO patients.
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Affiliation(s)
- Anna Miura
- Department of Psychosomatic Dentistry, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Trang T H Tu
- Department of Psychosomatic Dentistry, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Yukiko Shinohara
- Department of Psychosomatic Dentistry, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Lou Mikuzuki
- Department of Psychosomatic Dentistry, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kaoru Kawasaki
- Department of Psychosomatic Dentistry, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shiori Sugawara
- Department of Psychosomatic Dentistry, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takeshi Watanabe
- Department of Psychosomatic Dentistry, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Motoko Watanabe
- Department of Oral and Maxillofacial Radiology, Tokyo Dental College, Tokyo, Japan
| | - Yojiro Umezaki
- Department of Geriatric Dentistry, Fukuoka Dental College, Fukuoka, Japan
| | - Tatsuya Yoshikawa
- Department of Psychosomatic Dentistry, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Haruhiko Motomura
- Department of Psychosomatic Dentistry, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hidefumi Maeda
- Department of Endodontology and Operative Dentistry, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Tu TTH, Miura A, Shinohara Y, Mikuzuki L, Kawasaki K, Sugawara S, Suga T, Watanabe T, Watanabe M, Umezaki Y, Yoshikawa T, Motomura H, Takenoshita M, Toyofuku A. Evaluating Burning Mouth Syndrome as a Comorbidity of Atypical Odontalgia: The Impact on Pain Experiences. Pain Pract 2017; 18:580-586. [PMID: 28972293 DOI: 10.1111/papr.12647] [Citation(s) in RCA: 10] [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] [Received: 08/10/2017] [Revised: 09/20/2017] [Accepted: 09/26/2017] [Indexed: 01/03/2023]
Abstract
OBJECTIVE This study aimed (1) to investigate the differences in clinical characteristics of patients between 2 groups, those who have atypical odontalgia (AO) only and those who have AO with burning mouth syndrome (BMS), and (2) to assess the influence of psychiatric comorbidity factors on patients' experiences. METHOD Medical records and psychiatric referral forms of patients visiting the Psychosomatic Dentistry Clinic of Tokyo Medical and Dental University between 2013 and 2016 were reviewed. The final sample included 2 groups of 355 patients: those who have AO only (n = 272) and those who have AO with BMS (AO-BMS; n = 83). Clinicodemographic variables (gender, age, comorbid psychiatric disorders, and history of headache or sleep disturbances) and pain variables (duration of illness, pain intensity, and severity of accompanying depression) were collected. Initial pain assessment was done using the Short-Form McGill Pain Questionnaire, and depressive state was determined using the Zung Self-Rating Depression Scale. RESULTS The average age, female ratio, and sleep disturbance prevalence in the AO-only group were significantly lower than those in AO-BMS group. AO-BMS patients rated overall pain score and present pain intensity significantly higher than did the AO-only patients (P = 0.033 and P = 0.034, respectively), emphasizing sharp (P = 0.049), hot-burning (P = 0.000), and splitting (P = 0.003) characteristics of pain. Patients having comorbid psychiatric disorders had a higher proportion of sleep disturbance in both groups and a higher proportion of depressive state in the AO-only group. CONCLUSIONS AO-BMS patients have different epidemiological characteristics, sleep quality, and pain experiences compared to AO-only patients. The presence of psychiatric comorbidities in both groups may exacerbate sleep quality. We suggest that BMS as a comorbid oral disorder in AO patients contributes to a more intensively painful experience.
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Affiliation(s)
- Trang T H Tu
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Anna Miura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yukiko Shinohara
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Lou Mikuzuki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kaoru Kawasaki
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shiori Sugawara
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takayuki Suga
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takeshi Watanabe
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Motoko Watanabe
- Department of Oral and Maxillofacial Radiology, Tokyo Dental College, Tokyo, Japan
| | - Yojiro Umezaki
- Department of Geriatric Dentistry, Fukuoka Dental College, Fukuoka, Japan
| | - Tatsuya Yoshikawa
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Haruhiko Motomura
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Miho Takenoshita
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Toyofuku
- Department of Psychosomatic Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Nakajima M, Watari M, Uyama E, Honda S, Suga T, Ando Y. Deep venous thrombosis in patients with neuromuscular disorders: A multicenter, prospective study. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2313] [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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Tanaka T, Suga T, Otsuka M, Misaki J, Miyake Y, Kudo S, Nagano A, Isaka T. Relationship between the length of the forefoot bones and performance in male sprinters. Scand J Med Sci Sports 2017; 27:1673-1680. [PMID: 28207966 DOI: 10.1111/sms.12857] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/13/2017] [Indexed: 11/26/2022]
Abstract
Although recent studies have reported that the forefoot bones are longer in sprinters than in non-sprinters, these reports included a relatively small number of subjects. Moreover, while computer simulation suggested that longer forefoot bones may contribute to higher sprint performance by enhancing plantar flexor moment during sprinting, the correlation between forefoot bone length and sprint performance in humans has not been confirmed in observational studies. Thus, using a relatively large sample, we compared the length of the forefoot bones between sprinters and non-sprinters. We also examined the relationship between forefoot bone length and performance in sprinters. The length of forefoot bones of the big and second toes in 36 well-trained male sprinters and 36 male non-sprinters was measured using magnetic resonance imaging. The length of forefoot bones in the big and second toes was significantly longer in sprinters than in non-sprinters. After dividing the sprinters into faster and slower groups according to their personal best time in the 100-m sprint, it was found that the forefoot bone length of the second toe, but not that of the big toe, was significantly longer in faster group than in slower group. Furthermore, the forefoot bone length of the second toe correlated significantly with the personal best time in the 100-m sprint. This study supported evidence that the forefoot bones are longer in sprinters than in non-sprinters. In addition, this is the first study to show that longer forefoot bones may be advantageous for achieving superior sprint performance in humans.
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Affiliation(s)
- T Tanaka
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - T Suga
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - M Otsuka
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - J Misaki
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Y Miyake
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - S Kudo
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - A Nagano
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - T Isaka
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
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Kusunoki M, Natsume Y, Sato D, Tsutsui H, Miyata T, Tsutsumi K, Suga T, Oshida Y. Luseogliflozin, A Sodium Glucose Co-transporter 2 Inhibitor, Alleviates Hepatic Impairment in Japanese Patients with Type 2 Diabetes. Drug Res (Stuttg) 2016; 66:603-606. [DOI: 10.1055/s-0042-111515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- M. Kusunoki
- Research Center of Health, Physical Fitness and Sports, Nagoya University, Nagoya, Japan
| | - Y. Natsume
- Research Center of Health, Physical Fitness and Sports, Nagoya University, Nagoya, Japan
| | - D. Sato
- Graduate School of Medical Science, Yamagata University, Yamagata, Japan
| | - H. Tsutsui
- General Medical Education Center of Teikyo University, Tokyo, Japan
| | - T. Miyata
- Vascular Center, Sanno Medical Center, Tokyo, Japan
| | - K. Tsutsumi
- Okinaka Memorial Institute for Medical Research, Tokyo, Japan
| | - T. Suga
- Akishima Clinic, Nagoya, Japan
| | - Y. Oshida
- Research Center of Health, Physical Fitness and Sports, Nagoya University, Nagoya, Japan
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Tanaka D, Suga T, Tanaka T, Kido K, Honjo T, Fujita S, Hamaoka T, Isaka T. Ischemic Preconditioning Enhances Muscle Endurance during Sustained Isometric Exercise. Int J Sports Med 2016; 37:614-8. [PMID: 27176889 DOI: 10.1055/s-0035-1565141] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Ischemic preconditioning (IPC) enhances whole-body exercise endurance. However, it is poorly understood whether the beneficial effects originate from systemic (e. g., cardiovascular system) or peripheral (e. g., skeletal muscle) adaptations. The present study examined the effects of IPC on local muscle endurance during fatiguing isometric exercise. 12 male subjects performed sustained isometric unilateral knee-extension exercise at 20% of maximal voluntary contraction until failure. Prior to the exercise, subjects completed IPC or control (CON) treatments. During exercise trial, electromyography activity and near-infrared spectroscopy-derived deoxygenation in skeletal muscle were continuously recorded. Endurance time to task failure was significantly longer in IPC than in CON (mean±SE; 233±9 vs. 198±9 s, P<0.001). Quadriceps electromyography activity was not significantly different between IPC and CON. In contrast, deoxygenation dynamics in the quadriceps vastus lateralis muscle was significantly faster in IPC than in CON (27.1±3.4 vs. 35.0±3.6 s, P<0.01). The present study found that IPC can enhance muscular endurance during fatiguing isometric exercise. Moreover, IPC accelerated muscle deoxygenation dynamics during the exercise. Therefore, we suggest that the origin of beneficial effects of IPC on exercise performance may be the enhanced mitochondrial metabolism in skeletal muscle.
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Affiliation(s)
- D Tanaka
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - T Suga
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - T Tanaka
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - K Kido
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - T Honjo
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - S Fujita
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - T Hamaoka
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - T Isaka
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
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Tominaka S, Hamoudi H, Suga T, Bennett TD, Cairns AB, Cheetham AK. Topochemical conversion of a dense metal-organic framework from a crystalline insulator to an amorphous semiconductor. Chem Sci 2014; 6:1465-1473. [PMID: 29560235 PMCID: PMC5811114 DOI: 10.1039/c4sc03295k] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 12/01/2014] [Indexed: 11/24/2022] Open
Abstract
A dense, insulating metal–organic framework (MOF), is successfully converted into a semiconducting amorphous MOF via a topochemical route.
The topochemical conversion of a dense, insulating metal–organic framework (MOF) into a semiconducting amorphous MOF is described. Treatment of single crystals of copper(i) chloride trithiocyanurate, CuICl(ttcH3) (ttcH3 = trithiocyanuric acid), 1, in aqueous ammonia solution yields monoliths of amorphous CuI1.8(ttc)0.6(ttcH3)0.4, 3. The treatment changes the transparent orange crystals of 1 into shiny black monoliths of 3 with retention of morphology, and moreover increases the electrical conductivity from insulating to semiconducting (conductivity of 3 ranges from 4.2 × 10–11 S cm–1 at 20 °C to 7.6 × 10–9 S cm–1 at 140 °C; activation energy = 0.59 eV; optical band gap = 0.6 eV). The structure and properties of the amorphous conductor are fully characterized by AC impedance spectroscopy, X-ray photoelectron spectroscopy, X-ray pair distribution function analysis, infrared spectroscopy, diffuse reflectance spectroscopy, electron spin resonance spectroscopy, elemental analysis, thermogravimetric analysis, and theoretical calculations.
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Affiliation(s)
- S Tominaka
- Department of Materials Science and Metallurgy , University of Cambridge , Charles Babbage Road , Cambridge CB3 0FS , UK . ; ; Tel: +44 (0) 1223 767061.,International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science (NIMS) , 1-1 Namiki , Ibaraki 305-0044 , Japan . ; Tel: +81 29 860 4594
| | - H Hamoudi
- International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science (NIMS) , 1-1 Namiki , Ibaraki 305-0044 , Japan . ; Tel: +81 29 860 4594
| | - T Suga
- Waseda Institute for Advanced Study (WIAS) , Waseda University , 3-4-1 Okubo, Shinjuku , Tokyo 169-8555 , Japan
| | - T D Bennett
- Department of Materials Science and Metallurgy , University of Cambridge , Charles Babbage Road , Cambridge CB3 0FS , UK . ; ; Tel: +44 (0) 1223 767061
| | - A B Cairns
- Department of Chemistry , University of Oxford , Inorganic Chemistry Laboratory , South Parks Road , Oxford, OX1 3QR , UK
| | - A K Cheetham
- Department of Materials Science and Metallurgy , University of Cambridge , Charles Babbage Road , Cambridge CB3 0FS , UK . ; ; Tel: +44 (0) 1223 767061
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Komaba H, Kakuta T, Suzuki H, Hida M, Suga T, Fukagawa M. Survival advantage of lanthanum carbonate for hemodialysis patients with uncontrolled hyperphosphatemia. Nephrol Dial Transplant 2014; 30:107-14. [DOI: 10.1093/ndt/gfu335] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [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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Suga T, Mitani A, Mogi M, Kikuchi T, Fujimura T, Takeda H, Hishikawa T, Yamamoto G, Hayashi JI, Ishihara Y, Noguchi T. Aggregatibacter actinomycetemcomitans lipopolysaccharide stimulated epithelial cells produce interleukin-15 that regulates T cell activation. Arch Oral Biol 2013; 58:1541-8. [PMID: 23890451 DOI: 10.1016/j.archoralbio.2013.06.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2013] [Revised: 06/19/2013] [Accepted: 06/29/2013] [Indexed: 12/16/2022]
Abstract
OBJECTIVE Oral epithelial cells act not only as mechanical barriers but also as immunological barriers by producing various mediators such as cytokines. Since, in periodontal disease, limited information is available regarding the role of oral epithelial cell-derived cytokines on T cell activation, we investigated the responses of human T cells (Jurkat cell) to cytokines in KB cells (an oral epithelial cell line) that had been stimulated with Aggregatibacter actinomycetemcomitans lipopolysaccharide (LPS). DESIGN To evaluate T cell activation in response to the culture supernatant of KB cells, we examined cell proliferation and interferon gamma (IFN-γ) production, which is closely related to periodontal disease, in Jurkat cells. Culture supernatant of LPS-stimulated KB cells enhanced cell proliferation and IFN-γ production in Jurkat cells. To determine the active component within the culture supernatant, the production of epithelial cell-derived cytokines, interleukin-12 (IL-12), IL-15 and IL-18, in LPS-stimulated KB cells was analysed. RESULTS IL-15, but not IL-18, was significantly increased in the culture supernatant of LPS-stimulated KB cells. Moreover, additional anti-IL-15 neutralizing antibody abolished culture supernatant-induced IFN-γ expression in Jurkat cells. CONCLUSION These results suggest that periodontal pathogens induce the production of IL-15 from epithelial cells, and leading the activation of T cells in periodontal lesions.
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Affiliation(s)
- Takayuki Suga
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, 2-11 Suemoridori, Chikusa-ku, Nagoya, Aichi 464-8651, Japan
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Fujii T, Suzuki S, Shinozaki M, Tanaka H, Bell S, Cooper S, Lomonte C, Libutti P, Chimienti D, Casucci F, Bruno A, Antonelli M, Lisi P, Cocola L, Basile C, Negri A, Del Valle E, Zanchetta M, Zanchetta J, Di Vico MC, Ferraresi M, Pia A, Aroasio E, Gonella S, Mongilardi E, Clari R, Moro I, Piccoli GB, Gonzalez-Parra E, Rodriguez-Osorio L, Ortiz-Arduan A, de la Piedra C, Egido J, Perez Gomez MV, Tabikh AA, Afsar B, Kirkpantur A, Imanishi Y, Yamagata M, Nagata Y, Ohara M, Michigami T, Yukimura T, Inaba M, Bieber B, Robinson B, Mariani L, Jacobson S, Frimat L, Bommer J, Pisoni R, Tentori F, Ciceri P, Elli F, Brancaccio D, Cozzolino M, Adamczak M, Wiecek A, Kuczera P, Sezer S, Bal Z, Tutal E, Kal O, Yavuz D, Y ld r m I, Sayin B, Ozelsancak R, Ozkurt S, Turk S, Ozdemir N, Lehmann R, Roesel M, Fritz P, Braun N, Ulmer C, Steurer W, Dagmar B, Ott G, Dippon J, Alscher D, Kimmel M, Latus J, Turkvatan A, Balci M, Mandiroglu S, Seloglu B, Alkis M, Serin M, Calik Y, Erkula S, Gorboz H, Afsar B, Mandiroglu F, Kirkpantur A, Lindley E, Cruz Casal M, Rogers S, Pancirova J, Kernc J, Copley JB, Fouque D, Kiss I, Kiss Z, Szabo A, Szegedi J, Balla J, Ladanyi E, Csiky B, orkossy O, Torok M, Turi S, Ambrus C, Deak G, Tisler A, Kulcsar I, K d r V, Altuntas A, Akp nar A, Orhan H, Sezer M, Filiopoulos V, Manolios N, Arvanitis D, Pani I, Panagiotopoulos K, Vlassopoulos D, Rodriguez-Ortiz ME, Canalejo A, Herencia C, Martinez-Moreno JM, Peralta-Ramirez A, Perez-Martinez P, Navarro-Gonzalez JF, Rodriguez M, Peter M, Gundlach K, Steppan S, Passlick-Deetjen J, Munoz-Castaneda JR, Almaden Y, Munoz-Castaneda JR, Peralta-Ramirez A, Rodriguez-Ortiz M, Herencia C, Martinez-Moreno J, Lopez I, Aguilera-Tejero E, Peter M, Gundlach K, Steppan S, Passlick-Deetjen J, Rodriguez M, Almaden Y, Hanafusa N, Masakane I, Ito S, Nakai S, Maeda K, Suzuki H, Tsunoda M, Ikee R, Sasaki N, Sato M, Hashimoto N, Wang MH, Hung KY, Chiang CK, Huang JW, Lu KC, Lang CL, Okano K, Yamashita T, Tsuruta Y, Hibi A, Miwa N, Kimata N, Tsuchiya K, Nitta K, Akiba T, Sasaki N, Tsunoda M, Ikee R, Sato M, Hashimoto N, Harb L, Komaba H, Kakuta T, Suzuki H, Suga T, Fukagawa M, Kikuchi H, Shimada H, Karasawa R, Suzuki M, Zhelyazkova-Savova M, Gerova D, Paskalev D, Ikonomov V, Zortcheva R, Galunska B, Jean G, Deleaval P, Hurot JM, Lorriaux C, Mayor B, Chazot C, Vannucchi H, Vannucchi MT, Martins JC, Merino JL, Teruel JL, Fernandez-Lucas M, Villafruela JJ, Bueno B, Gomis A, Paraiso V, Quereda C, Ibrahim FH, Fadhlina NZ, Ng EK, Thong KM, Goh BL, Sulaiman DM, Fatimah DAN, Evi DO, Siti SR, Wilson RJ, Keith M, Copley JB, Gros B, Galan A, Gonzalez-Parra E, Herrero JA, Oyaguez I, Keith M, Casado MA, Lucisano S, Coppolino G, Villari A, Cernaro V, Lupica R, Trimboli D, Aloisi C, Buemi M. CKD-MBD II. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft149] [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: 11/14/2022] Open
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Abstract
Abstract
Two typical flow instabilities of “Shark Skin” and “Melt Fracture” for high density polyethylene were investigated in this report. Experimental measurements were carried out methodically in a wide flow region from the reservoir (entry region) to the die land with a specific slit die. Especially the flow pattern was visualized with a high speed camera and the frequency of the flow instability was analyzed. Corresponding to the visualization analysis, the pressure fluctuation in the slit die and the surface roughness at the die exit were measured simultaneously and these frequency characteristics were analyzed with a FFT (Fast Fourier Transform) analyzer. As for “Shark Skin” region, the irregularity of the surface roughness in the broad frequency band was recognized at the die exit. In spite of this surface roughness, the pressure fluctuation and the fluctuation of the flow pattern at the wall vicinity in the die land were not observed. These results indicate that “Shark Skin” occurs at the die exit. As for “Melt Fracture” region, the periodical oscillation of the flow pattern and the periodical pressure fluctuation which corresponded to the periodical distortion of the extrudate was recognized in the die land. However the periodical oscillation of the flow pattern and the periodical pressure fluctuation could not be recognized in the reservoir (entry region of the die land). These results indicate that “Melt Fracture” is initiated at the die entry and occurs in the die land. Consequently it is clarified that “Shark Skin” occurs at the die exit and the flow instability which lead to “Melt Fracture” is initiated at the die entry and occurs in the die land.
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Affiliation(s)
- H. Kometani
- Paper & Film Machinery Laboratory, Hiroshima Research & Development Center, Mitsubishi Heavy Industries Ltd., Nagoya, Japan
| | - H. Kitajima
- Paper & Film Machinery Laboratory, Hiroshima Research & Development Center, Mitsubishi Heavy Industries Ltd., Nagoya, Japan
| | - T. Matsumura
- Paper & Film Machinery Laboratory, Hiroshima Research & Development Center, Mitsubishi Heavy Industries Ltd., Nagoya, Japan
| | - T. Suga
- Paper & Film Machinery Laboratory, Hiroshima Research & Development Center, Mitsubishi Heavy Industries Ltd., Nagoya, Japan
| | - T. Kanai
- Plastics Technical Center, Idemitsu Kosan Co. Ltd., Chiba, Japan
- Faculty of Engineering, Kanazawa University, Kanazawa, Japan
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Abstract
Abstract
Polymer degradation in the extrusion process decreases quality and productivity. For this reason, it is necessary to prevent polymer degradation. In the extrusion process, polymer degradation is caused by oxidation. It depends on the processing temperature and the amount of dissolved oxygen in the molten polymer. Therefore, a quantitative analysis of these factors is required.
As for the degradation characteristics of the material used in this study, temperature and oxygen concentration dependency of the oxidation rate could be quantitatively characterized with an apparatus to evaluate polymer degradation which utilized chemiluminescence generated by an oxidation reaction.
Moreover, an online measuring apparatus to analyze dissolved gas in the extruded molten polymer was developed. With this apparatus, the volume ratio of dissolved gases (N2, O2 etc.) to the extruded molten polymer could be quantitatively analyzed and the quality of the extruded molten polymer evaluated.
With this apparatus, dissolved nitrogen (an index of entrained air) was analyzed with a full-flight screw and a barrier screw. Furthermore, observation of cross sectional views in the screw channel obtained from the cooling experiment under the operating conditions was carried out for the full-flight screw and the barrier screw. With the full-flight screw, break up phenomenon (collapse of solid polymer) occurred in the screw channel and the amount of nitrogen increased. With the barrier screw, the amount of nitrogen decreased because of prevention of the break up phenomenon in the screw channel.
Consequently, it is shown that the use of the barrier screw is suitable for oxygen reduction in the molten polymer, which is a factor in causing polymer degradation.
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Affiliation(s)
- H. Kometani
- Paper & Film Machinery Laboratory, Hiroshima Research & Development Center, Mitsubishi Heavy Industries Ltd., Nagoya, Japan
| | - T. Matsumura
- Paper & Film Machinery Laboratory, Hiroshima Research & Development Center, Mitsubishi Heavy Industries Ltd., Nagoya, Japan
| | - T. Suga
- Paper & Film Machinery Laboratory, Hiroshima Research & Development Center, Mitsubishi Heavy Industries Ltd., Nagoya, Japan
| | - T. Kanai
- Polymer Research Laboratory, Idemitsu Kosan Co. Ltd., Chiba, Japan
- Faculty of Engineering, Kanazawa University, Ishikawa, Japan
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Suga T, Kimura E, Morioka Y, Ikawa M, Uchino K, Koide T, Uchida Y, Yamashita S, Maeda Y, Li S, Chamberlain J, Uchino M. P4.58 Muscle fiber type-predominant promoter activity in lentiviral-mediated transgenic mouse. Neuromuscul Disord 2011. [DOI: 10.1016/j.nmd.2011.06.1023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Matsumura Y, Mitani A, Suga T, Kamiya Y, Kikuchi T, Tanaka S, Aino M, Noguchi T. Azithromycin may inhibit interleukin-8 through suppression of Rac1 and a nuclear factor-kappa B pathway in KB cells stimulated with lipopolysaccharide. J Periodontol 2011; 82:1623-31. [PMID: 21417583 DOI: 10.1902/jop.2011.100721] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Recent studies have shown that the 15-member macrolide antibiotic azithromycin (AZM) not only has antibacterial activity, but also results in the role of immunomodulator. Interleukin (IL)-8 is an important inflammatory mediator in periodontal disease. However, there have been no reports on the effects of AZM on IL-8 production from human oral epithelium. Therefore, we investigated the effects of AZM on IL-8 production in an oral epithelial cell line. METHODS KB cells were stimulated by Escherichia coli or Aggregatibacter actinomycetemcomitans (previously Actinobacillus actinomycetemcomitans) lipopolysaccharide (LPS) with or without AZM. IL-8 mRNA and protein expression and production in response to LPS were analyzed by quantitative polymerase chain reaction, flow cytometry, and enzyme-linked immunosorbent assay. The activation of nuclear factor-kappa B (NF-κB) and Rac1, which is important for IL-8 expression, was analyzed by enzyme-linked immunosorbent assay and Western blotting, respectively. RESULTS IL-8 mRNA expression, IL-8 production, and NF-κB activation in LPS-stimulated KB cells were inhibited by the addition of AZM. LPS-induced Rac1 activation was also suppressed by AZM. CONCLUSIONS This study suggests that AZM inhibits LPS-induced IL-8 production in an oral epithelial cell line, in part caused by the suppression of Rac1 and NF-κB activation. The use of AZM might provide possible benefits in periodontal therapy, with respect to both its antibacterial action and apparent anti-inflammatory effect.
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Affiliation(s)
- Yusuke Matsumura
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Nagoya, Aichi, Japan
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Howlader MMR, Suga T, Zhang F, Lee TH, Kim MJ. Interfacial Behavior of Surface Activated p-GaP/n-GaAs Bonded Wafers at Room Temperature. ACTA ACUST UNITED AC 2010. [DOI: 10.1149/1.3272957] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kimura E, Suga T, Ishizaki M, Uchino K, Koide T, Uchida Y, Maeda Y, Chamberlain J, Uchino M. M.P.2.09 Mdx diaphragm muscle as a target of dystrophin gene therapy. Neuromuscul Disord 2009. [DOI: 10.1016/j.nmd.2009.06.097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Suzuki M, Ishihara Y, Kamiya Y, Koide M, Fuma D, Fujita S, Matsumura Y, Suga T, Kamei H, Noguchi T. Soluble Interleukin-1 Receptor Type II Levels in Gingival Crevicular Fluid in Aggressive and Chronic Periodontitis. J Periodontol 2008; 79:495-500. [DOI: 10.1902/jop.2008.070111] [Citation(s) in RCA: 10] [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] [Indexed: 11/13/2022]
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Michikawa Y, Sugahara K, Suga T, Otsuka Y, Shiomi N, Iwakawa M, Imai T. 332 POSTER Solid-phase multiple displacement amplification for multi-loci genotyping of single chromosome molecules. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)70350-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Ohtomo T, Horii T, Nomizu M, Suga T, Yamada J. Molecular cloning of a structural homolog of YY1AP, a coactivator of the multifunctional transcription factor YY1. Amino Acids 2007; 33:645-52. [PMID: 17297563 DOI: 10.1007/s00726-006-0482-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2006] [Accepted: 11/28/2006] [Indexed: 11/26/2022]
Abstract
YY1 is a multifunctional transcription factor that activates or represses gene transcription depending on interactions with other regulatory proteins that include coactivator YY1AP. Here, we describe the cloning of a novel homolog of YY1AP, referred to as YARP, from the human neuroblastoma cell line SK-N-SH. The cloned cDNA encoded a 2240 amino acid protein that contained a domain which was 97% homologous to an entire YY1AP sequence of 739 amino acids. Two splice variants, YARP2 and YARP3, were also cloned. Northern blotting demonstrated the YARP mRNA (approximately 10 kb), which was increased 1.7-fold after dibutyryl cAMP-induced neural differentiation of the cells. Presence of YARP mRNA was also confirmed in human tissues such as the heart, brain and placenta. Bioinformatic analysis predicted various functional motifs in the YARP structure, including nuclear localization signals and domains associated with protein-protein interactions (PAH2), DNA-binding (SANT), and chromatin assembly (nucleoplasmin-like), outside the YY1AP-homology domain. Thus, we propose that YARP is multifunctional and plays not only a role analogous to YY1AP, but also its own specific roles in DNA-utilizing processes such as transcription.
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Affiliation(s)
- T Ohtomo
- Department of Clinical Biochemistry, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
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Ohtomo T, Horii T, Nomizu M, Suga T, Yamada J. Cloning and expression analysis of YY1AP-related protein in the rat brain. Amino Acids 2007; 34:155-61. [PMID: 17285227 DOI: 10.1007/s00726-006-0483-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2006] [Accepted: 11/28/2006] [Indexed: 11/26/2022]
Abstract
YY1AP-related protein (YARP) is a structural homolog of YY1AP, a transcriptional coactivator of the multifunctional transcription factor YY1. We cloned a rat YARP cDNA that encoded a 2256 amino acid protein with 93% homology to the human counterpart. Northern blots revealed significant expression of the YARP gene in the rat brain. In situ hybridization demonstrated its expression in neurons throughout the brain, including pyramidal cells in the cerebral cortex and hippocampus and granule cells in the dentate gyrus. YARP was coexpressed with YY1 in these same neuronal cells. However, there was no evidence of YARP expression in glia. In the developing rat brain, the level of YARP mRNA ( approximately 10 kb) peaked at embryonic day 18 and promptly declined thereafter to reach the steady-state level found in adulthood, by 14 days after birth. These results suggest that YARP functions at a late stage of neurogenesis during perinatal development of the rat brain, as well as in mature neurons.
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Affiliation(s)
- T Ohtomo
- Department of Clinical Biochemistry, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
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Kometani H, Matsumura T, Suga T, Kanai T. EXPERIMENTAL AND THEORETICAL ANALYSES OF FILM CASTING PROCESS. Journal of Polymer Engineering 2007. [DOI: 10.1515/polyeng.2007.27.1.1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Howlader M, Suehara S, Takagi H, Kim T, Maeda R, Suga T. Room-Temperature Microfluidics Packaging Using Sequential Plasma Activation Process. ACTA ACUST UNITED AC 2006. [DOI: 10.1109/tadvp.2006.875070] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ohta S, Yamamitsu T, Suga T. An efficient method for following the enzymic reactions involved in camphor biosynthesis in cinnamomum camphora by use of GC-MS and regiospecifically deuteriated substrate. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580310509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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