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Kobayashi Y, Sugahara K, Takemoto Y, Tsuda J, Hirose Y, Hashimoto M, Yamashita H. Protective effect of astaxanthin nanoemulsion on mammalian inner ear hair cells. PeerJ 2023; 11:e15562. [PMID: 37701833 PMCID: PMC10494832 DOI: 10.7717/peerj.15562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 05/24/2023] [Indexed: 09/14/2023] Open
Abstract
Background Aminoglycoside antibiotics are used for treating certain acute infections. However, these drugs cause ototoxicity by inducing inner ear hair cell death. Aims/Objectives We investigated the protective effect of a nanoemulsion of the carotenoid astaxanthin on mammalian inner ear hair cells against neomycin-induced ototoxicity. Material and Methods Dose-response relationship, quantification of hair cell loss, and reactive oxygen species production were assayed in response to neomycin with and without astaxanthin in cultured utricles of CBA/N mice. In addition, auditory brain response (ABR) and hair cell loss after exposure to the nanoformulation and loud noise were examined in vivo in guinea pigs. Results Astaxanthin suppressed neomycin-induced reduction of hair cells by reducing the production of hydroxy radicals. Furthermore, hair cell loss in the second rotation of the cochlea was significantly lower in the astaxanthin group than in the noise-only group. Conclusions and Significance The blood-labyrinth barrier limits the successful delivery of drugs for inner ear complications. However, in the nanoemulsion form, astaxanthin can penetrate the round window (fenestra ovale) membrane, enabling topical administration. Thus, astaxanthin nanoemulsion could be useful in treating ototoxicity in individuals with inner ear complications.
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Affiliation(s)
- Yuki Kobayashi
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Yosuke Takemoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Junko Tsuda
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Yoshinobu Hirose
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Makoto Hashimoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Hiroshi Yamashita
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
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Matsuura T, Sugahara K, Yamamoto Y, Tsuda J, Hashimoto M, Yamashita H. Prevention of progressive hearing loss in a mouse model of diabetes by oral intake of eicosapentaenoic acid ethyl ester. Acta Otolaryngol 2023; 143:113-120. [PMID: 36722024 DOI: 10.1080/00016489.2023.2170463] [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] [Indexed: 02/02/2023]
Abstract
BACKGROUND The prevalence of hearing impairment in patients with diabetes was significantly higher, and the development of preventive methods is desirable. AIMS/OBJECTIVES This study examined the effects of eicosapentaenoic acid (EPA) administration on the prevention of early hearing loss in diabetic mice. MATERIALS AND METHODS Tsumura, Suzuki, Obese Diabetes (TSOD) mice were used as a model of diabetes and Tsumura, Suzuki, Non Obesity (TSNO) mice were used as controls. The animals were divided into three groups: the TSNO group and the TSOD (EPA-) group (provided sunflower oil), and the TSOD (EPA+) group (provided EPA). Auditory brainstem responses (ABRs) were measured and the cochlea was evaluated histologically. RESULTS The TSOD (EPA+) group showed a lower tendency to increase thresholds than the TSOD (EPA-) group. The TSOD (EPA+) group had a significantly lower ABR threshold than the TSOD (EPA-) group from 11 to 14 months of age at 4 kHz. Narrowing of the capillary lumens in the stria vascularis and thickening of the vessel wall in the modiolus were observed in the TSOD (EPA-) group. CONCLUSIONS AND SIGNIFICANCE It was suggested that the suppression of cochlear vascular atherosclerosis by EPA administration in TSOD mice suppressed early age-related hearing loss.
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Affiliation(s)
- Takafumi Matsuura
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube City, Japan
| | - Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube City, Japan
| | - Yohei Yamamoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube City, Japan
| | - Junko Tsuda
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube City, Japan
| | - Makoto Hashimoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube City, Japan
| | - Hiroshi Yamashita
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube City, Japan
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Hiramoto K, Saito S, Hanaoka H, Suzuki K, Kikuchi J, Fukui H, Takano R, Miyoshi F, Seki N, Sugahara K, Kaneko Y, Takeuchi T. POS0459 APTAMER-BASED PROTEOMIC SCREENING IN IDENTIFICATION OF PATHOGENIC SIGNAL PATHWAY AND URINARY BIOMARKERS ASSOCIATED WITH HISTOLOGICAL FINDINGS IN LUPUS NEPHRITIS. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.2698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundThe current gold standard for the diagnosis and classification, assessment of the severity of lupus nephritis (LN) is a renal biopsy. On the other hand, since the procedure is highly invasive, there is a pressing need to identify biomarkers for predicting the presence and its histological severity of LN. In addition, the background pathogenesis of each histological findings is not clearly understood.ObjectivesThe purpose of this study was to elucidate the urine biomarkers for predicting the presence and the severity of histological findings of LN, and to search the pathogenic signal pathway.MethodsUrine samples from 24 biopsy-proven active LN patients were initially screened for the levels of 1305 distinct human proteins using an aptamer-based-targeted proteomic assay. We developed histological scoring system based on ISN/RPS lesion definitions and classification, NIH activity and chronicity score. Two experienced evaluators assessed the histological scores. Cluster analysis and pathway analysis were performed.ResultsA total of 24 LN patients were included: 20 (83%) had a proliferative histological class (III or IV +/-V), 4 (17%) pure membranous (V). Through cluster analysis, several histological subgroups were extracted according to correlation with each histological finding, and proteins which corelated with each histological scores were analyzed. We focused on two subgroups: one in which including active glomerular histological findings (endocapillary hypercellularity, karyorrhexis, neutrophil infiltration, subendothelial deposits) and the other in which including interstitial histological findings (interstitial inflammation, interstitial fibrosis, tubular atrophy). Histological scores in the former group showed strong positive correlation with protein group which contained 59 proteins (Group A), including CCL21, CXCL10, VCAM1. Histological scores in the latter group corelated with another protein group which contained 85 proteins (Group B), including MCP-1, CCL11. Ingenuity Pathway Analysis showed 16 pathways (PDGF Signaling, Granulocyte Adhesion and Diapedesis, etc) were upregulated in Group A and 11 pathways (IL-17 signaling, Fibrosis signaling pathway, etc) upregulated in Group B. Among group A and group B urine proteins, those showed strong correlation between respective histological findings were validated with ELISA assays.ConclusionAn aptamer-based-targeted proteomic assay screening by combining with renal histological scoring system suggested several urine proteins can predict the severity and the presence of major renal histological findings, and suggested to be related with the pathogenesis in patients with LN.Disclosure of InterestsKazuoto Hiramoto: None declared, Shuntaro Saito: None declared, Hironari Hanaoka: None declared, Katsuya Suzuki: None declared, Jun Kikuchi: None declared, Hiroyuki Fukui: None declared, Ryo Takano Employee of: Mitsubishi Tanabe Pharma Corporation Sohyaku, Fumihiko Miyoshi Employee of: Mitsubishi Tanabe Pharma Corporation Sohyaku, Noriyasu Seki Employee of: Mitsubishi Tanabe Pharma Corporation Sohyaku, Kunio Sugahara Employee of: Mitsubishi Tanabe Pharma Corporation Sohyaku, Yuko Kaneko: None declared, Tsutomu Takeuchi: None declared.
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Munakata K, Miyashita H, Nakahara T, Shiba H, Sugahara K, Katakura A, Nakagawa T. The use of SPECT/CT to assess resorptive activity in mandibular condyles. Int J Oral Maxillofac Surg 2021; 51:942-948. [PMID: 34937677 DOI: 10.1016/j.ijom.2021.11.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 08/30/2021] [Accepted: 11/26/2021] [Indexed: 12/20/2022]
Abstract
The aim of this study was to clarify the clinical significance of bone metabolism in the mandibular condyles in determining condylar resorptive changes. Twelve condyles of patients with idiopathic condylar resorption and degenerative joint disease were analysed using 99mTc HMDP SPECT/CT at baseline and subsequent computed tomography during the follow-up period. Twenty-two healthy condyles were enrolled as controls. After generating three-dimensional SPECT/CT images, two independent observers scored the degree of condylar uptake and measured the morphological changes in the condylar height and condylar volume. In the group with positive condylar uptake, the follow-up computed tomography showed significant decreases in condylar height (-1.69 ± 0.93 mm) and condylar volume (-12.51 ± 10.30%) when compared to healthy controls (condylar height, 0.09 ± 0.54 mm; condylar volume, -0.29 ± 4.22%) (P < 0.001). Moreover, the degree of uptake correlated with the changes in condylar height (observer 1, P = 0.012; observer 2, P = 0.039) and condylar volume (observer 1, P = 0.005; observer 2, P = 0.037). These results suggest that condylar bone metabolism is closely related to the resorptive activity. Thus, SPECT/CT would be useful in the prognostic evaluation or determination of treatment strategies for idiopathic condylar resorption and degenerative joint disease.
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Affiliation(s)
- K Munakata
- Department of Dentistry and Oral Surgery, Keio University School of Medicine, Tokyo, Japan
| | - H Miyashita
- Department of Dentistry and Oral Surgery, Keio University School of Medicine, Tokyo, Japan.
| | - T Nakahara
- Department of Radiology, Keio University School of Medicine, Tokyo, Japan
| | - H Shiba
- Department of Dentistry and Oral Surgery, Keio University School of Medicine, Tokyo, Japan
| | - K Sugahara
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Tokyo, Japan
| | - A Katakura
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Tokyo, Japan
| | - T Nakagawa
- Department of Dentistry and Oral Surgery, Keio University School of Medicine, Tokyo, Japan
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Tanabe K, Nishimura S, Sugahara K, Yamashita H, Tanizawa Y. A patient with sudden hearing loss induced by propylthiouracil. Heliyon 2021; 7:e06196. [PMID: 33615009 PMCID: PMC7881226 DOI: 10.1016/j.heliyon.2021.e06196] [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] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/15/2021] [Accepted: 02/01/2021] [Indexed: 11/02/2022] Open
Abstract
A 39-year-old man with type 1 diabetes, who had a 4-year history of Graves' disease being treated with propylthiouracil (PTU), had developed sudden hearing loss. However, he showed no other clinical manifestations. Intratympanic administration with dexamethasone had failed, and his hearing had deteriorated. Magnetic resonance imaging showed the contrast effect on T1-weighted image in both cochleae, and the serum immunological analysis showed the high titers for anti-neutrophil cytoplasmic antibodies (ANCA). Therefore, his sudden hearing loss was presumed to be initial presentation of ANCA-associated vasculitis owing to PTU. His hearing was rapidly restored by a PTU withdrawal while no use of immunosuppressive agents, and he confirmed his hearing improvement in ordinary conversation. The patient's clinical course suggests that bilateral sensorineural hearing loss that occurs during treating hyperthyroidism could be initial presentation of ANCA-associated vasculitis, and discontinuing anti-thyroid drugs should be considered before treating with glucocorticoids.
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Affiliation(s)
- Katsuya Tanabe
- Division of Endocrinology, Metabolism, Hematological Sciences and Therapeutics, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Shogo Nishimura
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Hiroshi Yamashita
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Yukio Tanizawa
- Division of Endocrinology, Metabolism, Hematological Sciences and Therapeutics, Yamaguchi University Graduate School of Medicine, Ube, Japan
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Koyachi M, Sugahara K, Odaka K, Matsunaga S, Abe S, Sugimoto M, Katakura A. Accuracy of Le Fort I osteotomy with combined computer-aided design/computer-aided manufacturing technology and mixed reality. Int J Oral Maxillofac Surg 2020; 50:782-790. [PMID: 33158695 DOI: 10.1016/j.ijom.2020.09.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 09/28/2020] [Accepted: 09/30/2020] [Indexed: 10/23/2022]
Abstract
The aim of this study was to verify the reproducibility and accuracy of preoperative planning in maxilla repositioning surgery performed with the use of computer-aided design/manufacturing technologies and mixed reality surgical navigation, using new registration markers and the HoloLens headset. Eighteen patients with a mean age of 26.0 years were included. Postoperative evaluations were conducted by comparing the preoperative virtual operation three-dimensional image (Tv) with the 1-month postoperative computed tomography image (T1). The three-dimensional surface analysis errors ranged from 79.9% to 97.1%, with an average error of 90.3%. In the point-based analysis, the errors at each point on the XYZ axes were calculated for Tv and T1 in all cases. The median signed value deviation of all calculated points on the XYZ axes was -0.03mm (range -2.93mm to 3.93mm). The median absolute value deviation of all calculated points on the XYZ axes was 0.38mm (range 0mm to 3.93mm). There were no statistically significant differences between any of the points on any of the axes. These values indicate that the method used was able to reproduce the maxilla position with high accuracy.
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Affiliation(s)
- M Koyachi
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Tokyo, Japan.
| | - K Sugahara
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Tokyo, Japan; Oral Health Science Centre, Tokyo Dental College, Tokyo, Japan
| | - K Odaka
- Department of Oral and Maxillofacial Radiology, Tokyo Dental College, Tokyo, Japan
| | - S Matsunaga
- Oral Health Science Centre, Tokyo Dental College, Tokyo, Japan; Department of Anatomy, Tokyo Dental College, Tokyo, Japan
| | - S Abe
- Oral Health Science Centre, Tokyo Dental College, Tokyo, Japan; Department of Anatomy, Tokyo Dental College, Tokyo, Japan
| | - M Sugimoto
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Tokyo, Japan; Okinaga Research Institute Innovation Laboratory, Teikyo University, Tokyo, Japan
| | - A Katakura
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Tokyo, Japan; Oral Health Science Centre, Tokyo Dental College, Tokyo, Japan
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Tarumoto S, Sugahara K, Hashimoto M, Hirose Y, Tsuda J, Takemoto Y, Fujii H, Matsuura T, Shimogori H, Ohgi J, Yamashita H. Effect of preservation on the physical and chemical properties of the temporal fascia. Auris Nasus Larynx 2020; 47:377-382. [PMID: 31983479 DOI: 10.1016/j.anl.2019.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 12/08/2019] [Accepted: 12/10/2019] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The temporal fascia has been widely used in tympanoplasty. In addition, the preserved fascia has been also used in the ear surgery. In this study, we planned the experiments to determine whether physical and chemical properties of the fascia preserved at a low temperature. METHODS Preserved temporal fasciae from 21 patients were used in this study. The thickness of the temporal fascia was measured under a 3D laser microscope. The tensile strength was evaluated using a tensile tester. In addition, the chemical property evaluated was the biologic antioxidative potential of samples. RESULTS The results showed that the strength of the fascia was not affected by the retention period. The thick fascia tended to show the less tensile strength. The intensity was highest in middle-aged donors when compared to young and older donor. The antioxidative potentials did not affect the preservation. CONCLUSION The results suggested that the preserved temporal fascia could be safely used for tympanoplasty.
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Affiliation(s)
- Shunsuke Tarumoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
| | - Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan.
| | - Makoto Hashimoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
| | - Yoshinobu Hirose
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
| | - Junko Tsuda
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
| | - Yosuke Takemoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
| | - Hironori Fujii
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
| | - Takafumi Matsuura
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
| | - Hiroaki Shimogori
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
| | - Junji Ohgi
- Department of Medical Mechanical Engineering, Yamaguchi University Graduate School of Science and Engineering, 2-16-1 Tokiwadai Ube, Yamaguchi 755-8611, Japan
| | - Hiroshi Yamashita
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
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Arai Y, Saruwatari T, Kikkou T, Sugahara K, Sato Y, Imada S, Katsuki Y, Kashiwa H, Yokoyama C, Iuchi K, Hisatomi H. Research Article Molecular phylogeny of the white-spotted charr, <i>Salvelinus<i> <i>leucomaenis</i> from Japan and the position of the <i>S.</i> <i>l.</i> <i>japonicus</i><i>morphotype</i> (nagaremon charr), demonstrating teleost diversification in an archipelago. Genet Mol Res 2020. [DOI: 10.4238/gmr18663] [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: 11/03/2022]
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Yasukawa R, Moteki H, Nishio SY, Ishikawa K, Abe S, Honkura Y, Hyogo M, Mihashi R, Ikezono T, Shintani T, Ogasawara N, Shirai K, Yoshihashi H, Ishino T, Otsuki K, Ito T, Sugahara K, Usami SI. The Prevalence and Clinical Characteristics of TECTA-Associated Autosomal Dominant Hearing Loss. Genes (Basel) 2019; 10:genes10100744. [PMID: 31554319 PMCID: PMC6826443 DOI: 10.3390/genes10100744] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 09/10/2019] [Accepted: 09/18/2019] [Indexed: 12/24/2022] Open
Abstract
TECTA is well known as a causative gene for autosomal dominant mid-frequency hearing loss observed in various populations. In this study, we performed next-generation sequencing analysis of a large Japanese hearing loss cohort, including eight hundred and twelve (812) subjects from unrelated autosomal dominant hearing loss families, to estimate the prevalence and phenotype-genotype correlations in patients with TECTA mutations. The prevalence of TECTA mutations in Japanese autosomal dominant sensorineural hearing loss families was found to be 3.2%. With regard to the type of hearing loss, the patients with mutations in the nidogen-like domain or ZA domain of TECTA showed varied audiograms. However, most of the patients with mutations in the ZP domain showed mid-frequency hearing loss. The rate of hearing deterioration in TECTA-associated hearing loss patients and in the normal hearing Japanese control population were the same and regression lines for each group were parallel. We carried out haplotype analysis for four families which had one recurring missense variant, c.5597C>T (p.Thr1866Met). Our results revealed four different haplotypes, suggesting that this mutation occurred independently in each family. In conclusion, TECTA variants represent the second largest cause of autosomal dominant sensorineural hearing loss in Japan. The hearing loss progression observed in the patients with TECTA mutations might reflect presbycusis. The c.5597C>T mutation occurred in a mutational hot spot and is observed in many ethnic populations.
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Affiliation(s)
- Rika Yasukawa
- Department of Otorhinolaryngology, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto 390-8621, Japan.
| | - Hideaki Moteki
- Department of Otorhinolaryngology, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto 390-8621, Japan.
| | - Shin-Ya Nishio
- Department of Otorhinolaryngology, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto 390-8621, Japan.
- Department of Hearing Implant Sciences, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto 390-8621, Japan.
| | - Kotaro Ishikawa
- Department of Otolaryngology, National Rehabilitation Center for Persons with Disabilities, 4-1 Namiki, Tokorozawa 359-8555, Japan.
| | - Satoko Abe
- Department of Otorhinolaryngology, Toranomon Hospital, 2-2-2 Toranomon, Tokyo 105-0001, Japan.
| | - Yohei Honkura
- Department of Otolaryngology-Head and Neck Surgery, Tohoku University School of Medicine, 1-1 Seiryomachi, Sendai 980-0872, Japan.
| | - Misako Hyogo
- Department of Otolaryngology-Head and Neck Surgery, Kyoto Prefectural University of Medicine, 465 Kagii-cho, Kyoto 602-8566, Japan.
| | - Ryota Mihashi
- Department of Otolaryngology-Head and Neck Surgery, Kurume University School of Medicine, 67 Asahi-machi, Kurume 830-0011, Japan.
| | - Tetsuo Ikezono
- Department of Otorhinolaryngology, Saitama Medical University, 38 Morohongo, Moroyama 350-0451, Japan.
| | - Tomoko Shintani
- Department of Microbiology, Sapporo Medical University School of Medicine, South-1, West-17, Sapporo 060-8556, Japan.
| | - Noriko Ogasawara
- Department of Microbiology, Sapporo Medical University School of Medicine, South-1, West-17, Sapporo 060-8556, Japan.
- Department of Otorhinolaryngology, Sapporo Medical University School of Medicine, South-1, West-17, Sapporo 060-556, Japan.
| | - Kyoko Shirai
- Department of Otorhinolaryngology-Head and Neck Surgery, Tokyo Medical University, 6-7-1 Nishi-shinjuku, Tokyo 160-0023, Japan.
| | - Hiroshi Yoshihashi
- Department of Medical Genetics, Tokyo Metropolitan Children's Medical Center, 2-8-29 Musashidai, Tokyo 183-8561, Japan.
| | - Takashi Ishino
- Department of Otorhinolaryngology, Head and Neck Surgery, Hiroshima University Hospital, 1-2-3 Kasumi, Hiroshima 734-0037, Japan.
| | - Koshi Otsuki
- Department of Otolaryngology, Fukushima Medical University, 1 Hikarigaoka, Fukushima 960-1295, Japan.
| | - Tsukasa Ito
- Department of Otolaryngology, Head and Neck Surgery, Yamagata University Faculty of Medicine, 2-2-2 Iida-nishi, Yamagata 990-9585, Japan.
| | - Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube City 755-8505, Japan.
| | - Shin-Ichi Usami
- Department of Otorhinolaryngology, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto 390-8621, Japan.
- Department of Hearing Implant Sciences, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto 390-8621, Japan.
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Matsumoto Y, Kabuki S, Sugawara A, Kitahara T, Akiba T, Fujita Y, Kawamata I, Yamada K, Amino K, Sasaki Y, Nishida M, Murakami K, Sugahara K, Saito N, Kunieda E. Basic evaluation of a novel 4D target and human body phantom. Phys Med Biol 2019; 64:145002. [PMID: 31146274 DOI: 10.1088/1361-6560/ab259c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Stereotactic body radiation therapy (SBRT) is usually verified with a dynamic phantom or solid phantom, but there is a demand for phantoms that can accurately simulate tumor dynamics within an individual that would allow customized validation in every patient. We developed a new 4D dynamic target phantom (multi-cell 4D phantom) that allows simulation of tumor movement in patients. The basic quality and dynamic reproducibility of this new phantom was verified in this investigation. The newly developed multi-cell 4D phantom comprises four main components: soft tissue, bones, lungs, and tumor (target). The phantom structure was based on computed tomography (CT) data of a male. In this study, we investigated the basic performance of a multi-cell 4D phantom. All the CT numbers of the phantom were very close to those of human data. The geometric maximum amplitudes were 4.57 mm in the lateral direction, 4.59 mm in the ventrodorsal direction, and 3.68 mm in the cranio-caudal direction. Geometric errors were 0.84, 0.58, and 0.40 mm, respectively. Movements of the abdominal surface were stable for 60 s. Repeated measurements show no actual differences in target movements between multiple measurements and indicated high reproducibility (r > 0.97). End-to-end tests using Gafchromic film revealed a gamma pass rate of 98% or above (2 mm/3%). Although our phantom performed limited reproducibility in the movement of the patient tumor at present, a satisfactory level of precision was confirmed in general. This is a very promising device for use in the verification of radiation therapy for moving targets.
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Affiliation(s)
- Y Matsumoto
- Department of Radiation Oncology, Tokai University Hachioji Hospital, Hachioji, Tokyo, 192-0032, Japan. Author to whom correspondence should be addressed
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Hori T, Sugahara K, Tsuda J, Hirose Y, Hashimoto M, Takemoto Y, Tarumoto S, Yamashita H. Oral administration of an herbal medicine to prevent progressive hearing loss in a mouse model of diabetes. Auris Nasus Larynx 2019; 46:703-708. [PMID: 30799140 DOI: 10.1016/j.anl.2019.01.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 10/23/2018] [Revised: 01/10/2019] [Accepted: 01/21/2019] [Indexed: 10/27/2022]
Abstract
OBJECTIVE Tsumura Suzuki Obese Diabetes (TSOD) mice exhibit early age-associated hearing loss. Histopathological analysis of these mice shows narrowing of capillaries in the stria vascularis and chronic reduction of blood flow in the cochlea. In this study, we investigated the effect of oral administration of a herbal medicine or calorie restriction on hearing in TSOD mice. METHODS TSOD mice were divided into 4 groups: CR (calorie restriction), BF and DS (treated with the herbal medicines, Bofutsushosan and Daisaikoto, respectively), and the control group. Body weight, blood glucose levels, and auditory brainstem responses (ABRs) were measured. The cochleae were excised and evaluated histopathologically. RESULTS Blood glucose levels were suppressed in the CR, BF, and DS groups. In addition, the elevation of ABR thresholds was inhibited in the CR, BF, and DS groups. Cochlear blood vessels remained wide in the three treatment groups compared with the control group. These results suggested that the administration of these herbal medicines improved glucose tolerance and yielded results similar to those on calorie restriction. CONCLUSION Oral administration of 2 herbal medicines can prevent hearing function disorder in a model mouse of diabetes. The results may clarify the possibility of clinical application.
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Affiliation(s)
- Takeshi Hori
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Junko Tsuda
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Yoshinobu Hirose
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Makoto Hashimoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Yousuke Takemoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Shunsuke Tarumoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Hiroshi Yamashita
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan.
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Takemoto Y, Hirose Y, Sugahara K, Hashimoto M, Hara H, Yamashita H. Erratum to "Protective effect of an astaxanthin nanoemulsion against neomycin-induced hair-cell damage in zebrafish" [Auris Nasus Larynx 45 (2018) 20-25]. Auris Nasus Larynx 2018; 46:484. [PMID: 30473273 DOI: 10.1016/j.anl.2018.11.010] [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: 11/15/2022]
Affiliation(s)
- Yosuke Takemoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan
| | - Yoshinobu Hirose
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan
| | - Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan
| | - Makoto Hashimoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan
| | - Hirotaka Hara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan
| | - Hiroshi Yamashita
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
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Iida Y, Wakiguchi H, Okazaki F, Nakamura T, Yasudo H, Kubo M, Sugahara K, Yamashita H, Suehiro Y, Okayama N, Hashimoto K, Iwamoto N, Kawakami A, Aoki Y, Takada H, Ohga S, Hasegawa S. Early canakinumab therapy for the sensorineural deafness in a family with Muckle-Wells syndrome due to a novel mutation of NLRP3 gene. Clin Rheumatol 2018; 38:943-948. [PMID: 30338413 DOI: 10.1007/s10067-018-4331-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 10/03/2018] [Accepted: 10/08/2018] [Indexed: 12/16/2022]
Abstract
Cryopyrin-associated periodic syndrome (CAPS) is one of the autoinflammatory disorders caused by mutations in NLRP3 gene. The over-production of interleukin (IL)-1β induced by NLRP3 gene mutations plays an important role in the pathophysiology of CAPS. We diagnosed 3 patients with CAPS, who were lineal family members having a novel mutation of NLRP3 gene. The objective of this report is to compare the characteristics of symptoms and differences in the therapeutic responses of them, who had the same mutation. In addition, we aimed to examine the usefulness of cytokine measurement for diagnosis or determination of treatment effect of CAPS. A 5-year-old Japanese boy (proband) came to our hospital because of short stature, reached the diagnosis of Muckle-Wells syndrome (MWS) due to a mutation in NLRP3 gene, which had not been reported so far (p.G328E, c.G983A). His mother and grandmother harbored the same mutation of NLRP3. We measured serum concentrations of cytokines in the proband assessed by flow-cytometric bead array. All of them had episodic skin eruptions with conjunctivitis, hearing loss, and arthralgia, but not periodic fever, cold-triggered episodes, and chronic aseptic meningitis. Only the proband had short stature. Canakinumab therapy led to a prompt relief of symptoms and normalized laboratory data in all patients. Audiograms demonstrated an improved hearing level in the proband, but not two others despite of the same mutation. All cytokines did not show any characteristic findings. Sensorineural hearing loss and itchless rash but not serum cytokine profile deserved attention to the diagnosis and treatment start of CAPS. The early intervention of IL-1β blockade may reduce the chance of complete deafness in patients with CAPS.
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Affiliation(s)
- Yasunori Iida
- Department of Pediatrics, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi, 755-8505, Japan
| | - Hiroyuki Wakiguchi
- Department of Pediatrics, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi, 755-8505, Japan.
| | - Fumiko Okazaki
- Department of Pediatrics, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi, 755-8505, Japan
| | - Tamaki Nakamura
- Department of Pediatrics, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi, 755-8505, Japan
| | - Hiroki Yasudo
- Department of Pediatrics, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi, 755-8505, Japan
| | - Makoto Kubo
- Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Hiroshi Yamashita
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Yutaka Suehiro
- Department of Oncology and Laboratory Medicine, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Naoko Okayama
- Division of Laboratory, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Kunio Hashimoto
- Department of Pediatrics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Naoki Iwamoto
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Atsushi Kawakami
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshiharu Aoki
- Division of Pediatrics, Nagato General Hospital, Nagato, Japan
| | - Hidetoshi Takada
- Department of Child Health, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Shouichi Ohga
- Department of Pediatrics, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi, 755-8505, Japan.,Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University Faculty of Medicine, Fukuoka, Japan
| | - Shunji Hasegawa
- Department of Pediatrics, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi, 755-8505, Japan
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Hibino Y, Sugahara K, Muro Y, Tanaka H, Sato T, Kondo Y. Simple and low-cost tabletop NMR system for chemical-shift-resolution spectra measurements. J Magn Reson 2018; 294:128-132. [PMID: 30036813 DOI: 10.1016/j.jmr.2018.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 06/08/2018] [Accepted: 07/06/2018] [Indexed: 05/03/2023]
Abstract
We have been working on developing a low-cost tabletop NMR system. We reported that a field homogeneity as high as 50 ppm was achieved with a simple NMR magnet by employing two facing ferrite magnets with iron disks in between (Chonlathep et al., 2017). In this paper, we report two improvements added to our previous system: (1) an FPGA based signal processing unit to improve the S/N ratio and (2) a simple shimming mechanism to improve the field homogeneity. We obtained as high as 1 ppm field homogeneity in the best case. The signals from hydrogen nuclear spins in a methyl and carboxy group in acetic acid were resolved in NMR spectra.
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Affiliation(s)
- Y Hibino
- Graduate School of Science and Engineering Research, Kindai University, 577-8502 Higashi-Osaka, Japan.
| | - K Sugahara
- Graduate School of Science and Engineering Research, Kindai University, 577-8502 Higashi-Osaka, Japan; Department of Electronics and Engineering, Kindai University, 577-8502 Higashi-Osaka, Japan.
| | - Y Muro
- THAMWAY Co., Ltd, 417-0001 Fuji, Japan
| | - H Tanaka
- THAMWAY Co., Ltd, 417-0001 Fuji, Japan
| | - T Sato
- THAMWAY Co., Ltd, 417-0001 Fuji, Japan
| | - Y Kondo
- Graduate School of Science and Engineering Research, Kindai University, 577-8502 Higashi-Osaka, Japan; Department of Physics, Kindai University, 577-8502 Higashi-Osaka, Japan.
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15
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Sakuramoto A, Hasegawa Y, Sugahara K, Komoda Y, Hasegawa K, Hikasa S, Kurashita M, Sakai J, Arita M, Yasukawa K, Kishimoto H. New paste for severe stomatitis in patients undergoing head-and-neck cancer radiotherapy and/or chemotherapy with oral appliance. BMC Cancer 2018; 18:245. [PMID: 29499657 PMCID: PMC5834906 DOI: 10.1186/s12885-018-4017-2] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 01/22/2018] [Indexed: 11/17/2022] Open
Abstract
Background The aim of the present study was to evaluate the physical properties of “admixture paste”, which is a commercially available gel containing hinokitiol for use against severe stomatitis, and its characteristics as a moisturizing gel and denture adhesive. Methods The admixture paste, which contained dexamethasone (Dexaltin®), gel for oral care (Refrecare H®) and petrolatum, and its 3 components, either alone or in different combinations, were subjected to viscosity, adhesiveness and elution testing to compare their physical properties. Viscosity was measured with a stress-controlled rheometer. Adhesive force was measured by tension test. Elution under a simulated oral environment was evaluated by monitoring with a fixed-point camera and absorbance. Both adhesiveness and elution were evaluated every hour for 6 h. A linear mixed-effects model was used to assess differences in the time course of elution between samples. In 3 og-rank test was used to compare time to elution into saliva among samples. Results The results of viscosity testing demonstrated that the admixture paste had similar viscosity to cream-type denture adhesives and this was temperature independent. In the adhesiveness tests, the admixture paste showed stronger adhesiveness than that of cream-type denture adhesives. In the elution test, the admixture paste demonstrated gradual dissolution and apparent temporal changes for 6 h in a simulated oral environment. Conclusions The results of the present study demonstrated that the admixture paste has adhesive force similar to those of denture adhesives and good local retention in saliva, and that it might be suitable for therapeutic use in patients with severe stomatitis derived from radiotherapy and/or chemotherapy for cancer. Electronic supplementary material The online version of this article (10.1186/s12885-018-4017-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ayumi Sakuramoto
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 663-8501, Japan
| | - Yoko Hasegawa
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 663-8501, Japan.
| | - Kazuma Sugahara
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 663-8501, Japan
| | - Yoshiyuki Komoda
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Kobe, Hyogo, 657-8501, Japan
| | - Kana Hasegawa
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 663-8501, Japan
| | - Shinichi Hikasa
- Department of Pharmacy, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 663-8501, Japan
| | - Mai Kurashita
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 663-8501, Japan
| | - Junya Sakai
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 663-8501, Japan
| | - Masahiro Arita
- Division of Occlusion & Maxillofacial Reconstruction, Department of Oral Function, School of Dentistry, Kyushu Dental University, Kitakyushu, Fukuoka, 803-8580, Japan
| | - Kazuhiro Yasukawa
- Medical Research Group, Development Department. Takiron Co., Ltd., Osaka, Japan
| | - Hiromitsu Kishimoto
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 663-8501, Japan
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Takano M, Kasahara K, Sugahara K, Watanabe A, Yoshida S, Shibahara T. Erratum to: Usefulness and capability of three-dimensional, full high-definition movies for surgical education. Maxillofac Plast Reconstr Surg 2017; 39:28. [PMID: 28861406 PMCID: PMC5559409 DOI: 10.1186/s40902-017-0124-2] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 06/29/2017] [Indexed: 11/10/2022] Open
Affiliation(s)
- M Takano
- Department of Oral and Maxillaofacial Surgery, Tokyo Dental College, 101-0061, 2-9-18 Misakicho, Chiyoda-ku, Tokyo, Japan
| | - K Kasahara
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Mihama-ku, Japan
| | - K Sugahara
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Mihama-ku, Japan
| | - A Watanabe
- Department of Oral and Maxillaofacial Surgery, Tokyo Dental College, 101-0061, 2-9-18 Misakicho, Chiyoda-ku, Tokyo, Japan
| | - S Yoshida
- Department of Oral and Maxillaofacial Surgery, Tokyo Dental College, 101-0061, 2-9-18 Misakicho, Chiyoda-ku, Tokyo, Japan
| | - T Shibahara
- Department of Oral and Maxillaofacial Surgery, Tokyo Dental College, 101-0061, 2-9-18 Misakicho, Chiyoda-ku, Tokyo, Japan
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17
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Takano M, Kasahara K, Sugahara K, Watanabe A, Yoshida S, Shibahara T. Usefulness and capability of three-dimensional, full high-definition movies for surgical education. Maxillofac Plast Reconstr Surg 2017; 39:10. [PMID: 28428952 PMCID: PMC5380545 DOI: 10.1186/s40902-017-0107-3] [Citation(s) in RCA: 2] [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: 02/07/2017] [Accepted: 02/15/2017] [Indexed: 11/18/2022] Open
Abstract
Background Because of changing surgical procedures in the fields of oral and maxillofacial surgery, new methods for surgical education are needed and could include recent advances in digital technology. Many doctors have attempted to use digital technology as educational tools for surgical training, and movies have played an important role in these attempts. We have been using a 3D full high-definition (full-HD) camcorder to record movies of intra-oral surgeries. Method The subjects were medical students and doctors receiving surgical training who did not have actual surgical experience (n = 67). Participants watched an 8-min, 2D movie of orthognathic surgery and subsequently watched the 3D version. After watching the 3D movie, participants were asked to complete a questionnaire. Result A lot of participants (84%) felt a 3D movie excellent or good and answered that the advantages of a 3D movie were their appearance of solidity or realism. Almost all participants (99%) answered that 3D movies were quite useful or useful for medical practice. Conclusions Three-dimensional full-HD movies have the potential to improve the quality of medical education and clinical practice in oral and maxillofacial surgery.
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Affiliation(s)
- M Takano
- Department of Oral and Maxillaofacial Surgery, Tokyo Dental College, 101-0061, 2-9-18 Misakicho, Chiyoda-ku, Tokyo, Japan
| | - K Kasahara
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Mihama-ku, Japan
| | - K Sugahara
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Mihama-ku, Japan
| | - A Watanabe
- Department of Oral and Maxillaofacial Surgery, Tokyo Dental College, 101-0061, 2-9-18 Misakicho, Chiyoda-ku, Tokyo, Japan
| | - S Yoshida
- Department of Oral and Maxillaofacial Surgery, Tokyo Dental College, 101-0061, 2-9-18 Misakicho, Chiyoda-ku, Tokyo, Japan
| | - T Shibahara
- Department of Oral and Maxillaofacial Surgery, Tokyo Dental College, 101-0061, 2-9-18 Misakicho, Chiyoda-ku, Tokyo, Japan
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18
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Takemoto Y, Hirose Y, Sugahara K, Hashimoto M, Hara H, Yamashita H. Protective effect of an astaxanthin nanoemulsion against neomycin-induced hair-cell damage in zebrafish. Auris Nasus Larynx 2017; 45:20-25. [PMID: 28274503 DOI: 10.1016/j.anl.2017.02.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 12/25/2016] [Accepted: 02/06/2017] [Indexed: 11/18/2022]
Abstract
Objective The cause of those hair cells disorder is oxidative stress due to free radicals. In particular, hair cells are very susceptible to aminoglycosides. Antioxidant is known to reduce the generation of oxygen-derived free radicals. Various antioxidant is marketed, and different dosage form is developed with the same drug. Using a zebra fish lateral line, we report hair cell protection effect of astaxanthin from neomycin-induced trauma. Methods Zebrafish larvae were exposed to the astaxanthin nanoemulsion or to the suspension for 1 h, or were left unexposed. Subsequently, the larvae were exposed to neomycin for 1 h by adding the neomycin solution. Results were calculated as the mean hair-cell survival as a percentage of the control. Results Hair cells were not protected in the group treated with astaxanthin suspension and neomycin. On the other hand, there was dose-dependent protection against neomycin-induced hair-cell death in the zebrafish lateral-line hair cells in the group treated with nano astaxanthin. Conclusion The results of the current study performed using a zebra fish lateral-line, nano astaxanthin protected sensory hair cells against neomycin-induced death. This suggests that nano-astaxanthin is more efficiently absorbed in the body than astaxanthin, and may be useful as a protective drug for the inner ear.
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Affiliation(s)
- Yosuke Takemoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan
| | - Yoshinobu Hirose
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan
| | - Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan
| | - Makoto Hashimoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan
| | - Hirotaka Hara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan
| | - Hiroshi Yamashita
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan.
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Hasegawa Y, Sugahara K, Fukuoka T, Saito S, Sakuramoto A, Horii N, Sano S, Hasegawa K, Nakao Y, Nanto T, Kadoi K, Moridera K, Noguchi K, Domen K, Kishimoto H. Change in tongue pressure in patients with head and neck cancer after surgical resection. Odontology 2017; 105:494-503. [PMID: 28197773 DOI: 10.1007/s10266-016-0291-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 12/20/2016] [Indexed: 12/13/2022]
Abstract
Tongue pressure is reportedly associated with dysphagia. This study investigated relationships among characteristics of head and neck cancer, tongue pressure and dysphagia screening tests performed in patients with head and neck cancer during the acute phase after surgical resection. Fifty-seven patients (36 men, 21 women; age range 26-95 years) underwent surgical resection and dysphagia screening tests (Repetitive Saliva Swallowing Test, Water Swallowing Test, Modified Water Swallowing Test and Food Test) and pre- and postoperative measurement of tongue pressure at 5 time points (preoperatively, and 1-2 weeks and 1, 2, and 3 months postoperatively). Progression of cancer (stage), tracheotomy, surgical reconstruction, chemotherapy, radiotherapy and neck dissection were factors associated with postoperative tongue pressure. Data were analyzed by linear mixed-effect model, Spearman correlation coefficient and receiver operating characteristic (ROC) curve. Tongue pressure was significantly reduced 1-2 weeks after surgery, and recovered over time. Changes in tongue pressure were significantly associated with stage, radiotherapy and reconstruction. All screening tests showed a significant relationship with tongue pressure. Analysis of ROC and area under the effect curve suggested that a tongue pressure of 15 kPa can be used as a cut-off value to detect dysphagia after surgery for head and neck cancer. Our results suggest that tongue pressure evaluation might offer a safe, useful and objective tool to assess dysphagia immediately postoperatively in patients with head and neck cancer.
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Affiliation(s)
- Yoko Hasegawa
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya City, Hyogo, 663-8501, Japan.
| | - Kazuma Sugahara
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya City, Hyogo, 663-8501, Japan
| | - Tatsuyuki Fukuoka
- Department of Physical Medicine and Rehabilitation, Hyogo College of Medicine College Hospital, Hyogo, Japan
| | - Shota Saito
- Department of Physical Medicine and Rehabilitation, Hyogo College of Medicine College Hospital, Hyogo, Japan
| | - Ayumi Sakuramoto
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya City, Hyogo, 663-8501, Japan
| | - Nobuhide Horii
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya City, Hyogo, 663-8501, Japan
| | - Saori Sano
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya City, Hyogo, 663-8501, Japan
| | - Kana Hasegawa
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya City, Hyogo, 663-8501, Japan
| | - Yuta Nakao
- Department of Physical Medicine and Rehabilitation, Hyogo College of Medicine College Hospital, Hyogo, Japan
| | - Tomoki Nanto
- Department of Physical Medicine and Rehabilitation, Hyogo College of Medicine College Hospital, Hyogo, Japan
| | - Kanenori Kadoi
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya City, Hyogo, 663-8501, Japan
| | - Kuniyasu Moridera
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya City, Hyogo, 663-8501, Japan
| | - Kazuma Noguchi
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya City, Hyogo, 663-8501, Japan
| | - Kazuhisa Domen
- Department of Rehabilitation Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - Hiromitsu Kishimoto
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya City, Hyogo, 663-8501, Japan
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20
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Chonlathep K, Sakamoto T, Sugahara K, Kondo Y. A simple and low-cost permanent magnet system for NMR. J Magn Reson 2017; 275:114-119. [PMID: 28043004 DOI: 10.1016/j.jmr.2016.12.010] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 12/13/2016] [Accepted: 12/19/2016] [Indexed: 06/06/2023]
Abstract
We have developed a simple, easy to build, and low-cost magnet system for NMR, of which homogeneity is about 4×10-4 at 57mT, with a pair of two commercially available ferrite magnets. This homogeneity corresponds to about 90Hz spectral resolution at 2.45MHz of the hydrogen Larmor frequency. The material cost of this NMR magnet system is little more than $100. The components can be printed by a 3D printer.
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Affiliation(s)
- K Chonlathep
- Grad. Sch. of Sci. and Eng., Kindai Univ., 577-8502 Higashi Osaka, Japan.
| | - T Sakamoto
- Dept. of Ele. and Eng., Kindai Univ., 577-8502 Higashi Osaka, Japan.
| | - K Sugahara
- Grad. Sch. of Sci. and Eng., Kindai Univ., 577-8502 Higashi Osaka, Japan; Dept. of Ele. and Eng., Kindai Univ., 577-8502 Higashi Osaka, Japan.
| | - Y Kondo
- Grad. Sch. of Sci. and Eng., Kindai Univ., 577-8502 Higashi Osaka, Japan; Dept. of Phys., Kindai Univ., 577-8502 Higashi Osaka, Japan.
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Ueyama T, Ninoyu Y, Nishio SY, Miyoshi T, Torii H, Nishimura K, Sugahara K, Sakata H, Thumkeo D, Sakaguchi H, Watanabe N, Usami SI, Saito N, Kitajiri SI. Constitutive activation of DIA1 (DIAPH1) via C-terminal truncation causes human sensorineural hearing loss. EMBO Mol Med 2016; 8:1310-1324. [PMID: 27707755 PMCID: PMC5090661 DOI: 10.15252/emmm.201606609] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [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: 01/02/2023] Open
Abstract
DIAPH1 encodes human DIA1, a formin protein that elongates unbranched actin. The c.3634+1G>T DIAPH1 mutation causes autosomal dominant nonsyndromic sensorineural hearing loss, DFNA1, characterized by progressive deafness starting in childhood. The mutation occurs near the C‐terminus of the diaphanous autoregulatory domain (DAD) of DIA1, which interacts with its N‐terminal diaphanous inhibitory domain (DID), and may engender constitutive activation of DIA1. However, the underlying pathogenesis that causes DFNA1 is unclear. We describe a novel patient‐derived DIAPH1 mutation (c.3610C>T) in two unrelated families, which results in early termination prior to a basic amino acid motif (RRKR1204–1207) at the DAD C‐terminus. The mutant DIA1(R1204X) disrupted the autoinhibitory DID‐DAD interaction and was constitutively active. This unscheduled activity caused increased rates of directional actin polymerization movement and induced formation of elongated microvilli. Mice expressing FLAG‐tagged DIA1(R1204X) experienced progressive deafness and hair cell loss at the basal turn and had various morphological abnormalities in stereocilia (short, fused, elongated, sparse). Thus, the basic region of the DAD mediates DIA1 autoinhibition; disruption of the DID‐DAD interaction and consequent activation of DIA1(R1204X) causes DFNA1.
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Affiliation(s)
- Takehiko Ueyama
- Laboratory of Molecular Pharmacology, Biosignal Research Center, Kobe University, Kobe, Japan
| | - Yuzuru Ninoyu
- Laboratory of Molecular Pharmacology, Biosignal Research Center, Kobe University, Kobe, Japan
| | - Shin-Ya Nishio
- Department of Otorhinolaryngology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Takushi Miyoshi
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hiroko Torii
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Koji Nishimura
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | | | - Dean Thumkeo
- Medical Innovation Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Hirofumi Sakaguchi
- Department of Otolaryngology-Head and Neck Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Naoki Watanabe
- Department of Pharmacology, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Laboratory of Single-Molecule Cell Biology, Kyoto University Graduate School of Biostudies, Kyoto, Japan
| | - Shin-Ichi Usami
- Department of Otorhinolaryngology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Naoaki Saito
- Laboratory of Molecular Pharmacology, Biosignal Research Center, Kobe University, Kobe, Japan
| | - Shin-Ichiro Kitajiri
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Tsuda J, Sugahara K, Hori T, Kanagawa E, Takaki E, Fujimoto M, Nakai A, Yamashita H. A study of hearing function and histopathologic changes in the cochlea of the type 2 diabetes model Tsumura Suzuki obese diabetes mouse. Acta Otolaryngol 2016; 136:1097-1106. [PMID: 27308832 DOI: 10.1080/00016489.2016.1195012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
OBJECTIVES This study used Tsumura Suzuki Obese Diabetes (TSOD) mice as a spontaneous type 2 diabetes model and Tsumura Suzuki Non-obesity (TSNO) mice as controls to investigate factors involved in the onset of hearing impairment. METHOD Body weight, blood glucose levels, and auditory brainstem responses (ABRs) were measured. The cochleae were excised and evaluated histopathologically. RESULTS The TSOD mice showed significant hyperglycemia at 2-7 months and severe obesity at 5-10 months; significantly elevated ABR thresholds at 8-10 months; and the capillary lumens in the cochlea stria vascularis were narrower in the TSOD mice than in the TSNO mice. At 17 months, India ink vascular staining of the TSOD mice's cochleae revealed decreased capillary density in the stria vascularis. The vascular area of capillaries in the stria vascularis and the vascular area were significantly smaller in TSOD mice. Histopathological analysis showed vessel wall thickening in the modiolus and narrowed capillaries in the stria vascularis, suggesting reduced blood flow to the inner ear. CONCLUSION The diabetes mice model used in our study showed early age-associated hearing loss, and histopathology showed findings of vessel wall thickening in the modiolus, narrowing of capillaries in the stria vascularis, and chronically reduced blood flow in the cochlea.
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Hasegawa Y, Sugahara K, Sano S, Sakuramoto A, Kishimoto H, Oku Y. Enhanced salivary secretion by interferential current stimulation in subjects with dry mouth: a pilot study-reply. Oral Surg Oral Med Oral Pathol Oral Radiol 2016; 122:520-1. [PMID: 27651292 DOI: 10.1016/j.oooo.2016.06.095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 06/29/2016] [Indexed: 11/20/2022]
Affiliation(s)
- Yoko Hasegawa
- Lecturer, Department of Dentistry and Oral Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - Kazuma Sugahara
- Resident, Department of Dentistry and Oral Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - Saori Sano
- Department Staff, Department of Dentistry and Oral Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - Ayumi Sakuramoto
- Resident, Department of Dentistry and Oral Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - Hiromitsu Kishimoto
- Professor and Chairman, Department of Dentistry and Oral Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - Yoshitaka Oku
- Professor and Chairman, Department of Physiology, Hyogo College of Medicine, Hyogo, Japan
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Yoshimoto K, Suzuki K, Ishioka E, Nishikawa A, Sugahara K, Takeuchi T. AB0045 Low Molecular Weight-Baff Receptor Antagonists Suppress IGG Production by B Cells Co-Cultured with Monocytes. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.4682] [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: 11/04/2022]
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Hasegawa Y, Sugahara K, Sano S, Sakuramoto A, Kishimoto H, Oku Y. Enhanced salivary secretion by interferential current stimulation in patients with dry mouth: a pilot study. Oral Surg Oral Med Oral Pathol Oral Radiol 2016; 121:481-9. [PMID: 27017403 DOI: 10.1016/j.oooo.2016.01.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 12/24/2015] [Accepted: 01/22/2016] [Indexed: 11/15/2022]
Abstract
OBJECTIVE This pilot study tested the effects of submandibular and sublingual gland stimulation by interferential current stimulation (IFCS), a noninvasive mode of electrical stimulation. STUDY DESIGN Three groups were enrolled in this study: 20 young adults, 19 older adults, and 21 patients with dry mouth. Four electrodes were attached to the submandibular area, and the secreted saliva was collected by using Salivette cotton rolls (Sarstedt K. K., Tokyo, Japan) for 15 minutes, either with or without IFCS. Patients were randomly chosen to receive IFCS. Each subject rated pain and discomfort on the Visual Analogue Scale (VAS) after each experiment. Saliva chromogranin A levels were measured as a stress marker. To compare data between conditions with and without IFCS, a two-sample Student t test analysis was performed. RESULTS Saliva flow was slightly increased in those in the dry mouth group receiving IFCS compared with those who did not receive IFCS (approximately 130%). However, no such difference was found in the young and older adult groups. There was no significant difference in the VAS values of pain and discomfort or in the stress marker levels between patients who received or did not receive IFCS in the three groups. CONCLUSIONS IFCS delivered to submandibular and sublingual glands may promote saliva secretion in persons who suffer from dry mouth in a manner that does not induce pain or physical stress.
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Affiliation(s)
- Yoko Hasegawa
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Kazuma Sugahara
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Saori Sano
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Ayumi Sakuramoto
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Hiromitsu Kishimoto
- Department of Dentistry and Oral Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan.
| | - Yoshitaka Oku
- Department of Physiology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan.
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Takano M, Shibahara T, Saito C, Watanabe A, Muramatsu K, Murayama M, Hamada Y, Katakura A, Kasahara K, Sugahara K. Usefulness of piezoelectric surgery to reduce neurosensory disturbances of inferior alveolar nerve after SSRO. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.343] [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]
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Yoshida S, Sugahara K, Hashimoto M, Hirose Y, Shimogori H, Yamashita H. The minimum peptides of IGF-1 and substance P protect vestibular hair cells against neomycin ototoxicity. Acta Otolaryngol 2015; 135:411-5. [PMID: 25739461 DOI: 10.3109/00016489.2014.979438] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
CONCLUSIONS Our data indicate that SSSR and SSSR + FGLM-NH2 protect sensory hair cells against neomycin-induced death in the vestibular epithelium. In addition, the results show that SSSR and FGLM-NH2 can be used as protective molecules against aminoglycoside ototoxicity. OBJECTIVES This study investigated the role of the peptides SSSR and SSSR + FGLM-NH2 in mammalian vestibular hair cell death induced by aminoglycoside. METHODS Cultured utricles from mature CBA/N mice were used in this study. The cultured utricles were assigned to five groups (control group, neomycin group, neomycin + SSSR group, neomycin + FGLM-NH2 group, and neomycin + SSSR + FGLM-NH2 group). Aat 24 h after exposure to neomycin, the hair cells were labeled immunohistochemically, and the rate of survival of vestibular hair cells was evaluated using a fluorescence microscope. RESULTS The rate of survival of vestibular hair cells was significantly higher in the neomycin + SSSR and neomycin + SSSR + FGLM-NH2 groups than in the neomycin group. The results suggest that SSSR could protect hair cells against aminoglycoside ototoxicity.
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Affiliation(s)
- Shuhei Yoshida
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine , Ube, Yamaguchi , Japan
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Nakatsu A, Hashimoto M, Sugahara K, Shimogori H, Ikeda T, Yamashita H. Problems related to treatment and education provided for infants with hearing loss living in Yamaguchi Prefecture. ACTA ACUST UNITED AC 2015. [DOI: 10.4295/audiology.58.151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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)
- Aiko Nakatsu
- Department of Otolaryngology, Graduate school of Medicine, University of Yamaguchi
- Center for High Integrated Sensations, Yamaguchi University Hospital
| | - Makoto Hashimoto
- Department of Otolaryngology, Graduate school of Medicine, University of Yamaguchi
- Center for High Integrated Sensations, Yamaguchi University Hospital
| | - Kazuma Sugahara
- Department of Otolaryngology, Graduate school of Medicine, University of Yamaguchi
| | - Hiroaki Shimogori
- Department of Otolaryngology, Graduate school of Medicine, University of Yamaguchi
| | - Takuo Ikeda
- Otolaryngology, Tsuzumigaura Handicapped Childrens' Hospital
| | - Hiroshi Yamashita
- Department of Otolaryngology, Graduate school of Medicine, University of Yamaguchi
- Center for High Integrated Sensations, Yamaguchi University Hospital
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Alam M, Yoshizawa F, Sugahara K. Voluntary food intake variation in chickens on lysine-free diet is attributed to the plasma lysine concentration. Br Poult Sci 2014; 55:605-9. [DOI: 10.1080/00071668.2014.949623] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sugahara K, Hirose Y, Mikuriya T, Hashimoto M, Kanagawa E, Hara H, Shimogori H, Yamashita H. Coenzyme Q10 protects hair cells against aminoglycoside. PLoS One 2014; 9:e108280. [PMID: 25265538 PMCID: PMC4180734 DOI: 10.1371/journal.pone.0108280] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Accepted: 08/27/2014] [Indexed: 11/25/2022] Open
Abstract
It is well known that the production of free radicals is associated with sensory cell death induced by an aminoglycoside. Many researchers have reported that antioxidant reagents protect sensory cells in the inner ear, and coenzyme Q10 (CoQ10) is an antioxidant that is consumed as a health food in many countries. The purpose of this study was to investigate the role of CoQ10 in mammalian vestibular hair cell death induced by aminoglycoside. Cultured utricles of CBA/CaN mice were divided into three groups (control group, neomycin group, and neomycin + CoQ10 group). In the neomycin group, utricles were cultured with neomycin (1 mM) to induce hair cell death. In the neomycin + CoQ10 group, utricles were cultured with neomycin and water-soluble CoQ10 (30–0.3 µM). Twenty-four hours after exposure to neomycin, the cultured tissues were fixed, and vestibular hair cells were labeled using an anti-calmodulin antibody. Significantly more hair cells survived in the neomycin + CoQ10 group than in the neomycin group. These data indicate that CoQ10 protects sensory hair cells against neomycin-induced death in the mammalian vestibular epithelium; therefore, CoQ10 may be useful as a protective drug in the inner ear.
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Affiliation(s)
- Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
- * E-mail:
| | - Yoshinobu Hirose
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Takefumi Mikuriya
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Makoto Hashimoto
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Eiju Kanagawa
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Hirotaka Hara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Hiroaki Shimogori
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Hiroshi Yamashita
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
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Kasahara K, Yamamura T, Sugahara K, Takano M, Shibahara T. Systemic Inflammatory Response Syndrome and postoperative complications after orthognathic surgery. J Oral Maxillofac Surg 2014. [DOI: 10.1016/j.joms.2014.06.251] [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: 10/24/2022]
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Kanagawa E, Sugahara K, Hirose Y, Mikuriya T, Shimogori H, Yamashita H. Effects of substance P during the recovery of hearing function after noise-induced hearing loss. Brain Res 2014; 1582:187-96. [PMID: 25064433 DOI: 10.1016/j.brainres.2014.07.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 11/11/2013] [Revised: 07/14/2014] [Accepted: 07/16/2014] [Indexed: 10/25/2022]
Abstract
Substance P (SP) is a widely distributed neurotransmitter in living tissues and is involved in various repair processes. We investigated the possibility that SP may ameliorate cochlear hair cell damage produced by noise exposure. The present study examined the effect of SP in protecting the cochlea from noise damage in guinea pigs exposed to noise after an infusion of SP into the inner ear. Changes in the hearing threshold (auditory brain response, ABR), number of synaptic ribbons, and the appearance of the outer hair cells after noise exposure were analyzed at 2 severity levels of noise-induced hearing loss. The moderate noise-induced hearing loss (110dB, 3h) group showed recovery in the ABR threshold over time, finally reaching a level slightly above pre-exposure levels, with only slight injury to the synaptic ribbons and minimal changes in the appearance of the outer hair cells. Our results indicated that in moderate hearing loss, SP exhibited a protective effect on the inner ear, both functionally and structurally. While the final magnitude of ABR threshold elevation was greater in severe noise-induced hearing loss, the synaptic ribbons and outer hair cells showed signs of severe damage.
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Affiliation(s)
- Eiju Kanagawa
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan
| | - Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan
| | - Yoshinobu Hirose
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan
| | - Takefumi Mikuriya
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan
| | - Hiroaki Shimogori
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan
| | - Hiroshi Yamashita
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan.
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Seki N, Shimano K, Kondou T, Murase M, Mitamura M, Kataoka H, Sugahara K, Nakamura H, Yamada M. OP0105 Pyrazole-Anilide Derivatives, A New Class of Immunomodulator Which Inhibits IL-17 Production, Ameliorate CIA and Psoriasis-Like Dermatitis in Mice. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
CONCLUSION Laryngotracheal separation (LTS) can prevent aspiration pneumonia, improve the respiratory condition, and offer the possibility of home care for neurologically impaired children. OBJECTIVES This study aimed to evaluate the effectiveness of LTS in neurologically impaired pediatric patients from the viewpoint of postoperative success of pneumonia prevention, improvement in the respiratory condition, and postoperative success rate of home-based care. METHODS The medical records of 21 children who underwent LTS at an academic medical center from September 2004 to March 2013 were retrospectively investigated. Pre- and postoperative data, including the frequency of pneumonia treatment, the frequency of sputum suctioning, the respiratory condition, the nutrition method, and the outcome after LTS were assessed. We also used the scoring system for patients with severe motor and intellectual disabilities, medical care dependent group (SMID-MCDG) in Japan for evaluating the usefulness of LTS. RESULTS The frequency of pneumonia treatment and that of suctioning decreased considerably after LTS. Furthermore, the respiratory condition improved at a rate of 63.19%. The SMID-MCDG score significantly reduced after LTS. No significant complications were observed and two-thirds of the patients were successfully discharged for home care after the procedure.
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Affiliation(s)
- Hirotaka Hara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine , Ube, Yamaguchi
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Hara H, Hori T, Sugahara K, Yamashita H. Surgical planning of Isshiki type I thyroplasty using an open-source Digital Imaging and Communication in Medicine viewer OsiriX. Acta Otolaryngol 2014; 134:620-5. [PMID: 24646143 DOI: 10.3109/00016489.2014.880796] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONCLUSION Preoperative surgical planning of Isshiki type I thyroplasty with the Digital Imaging and Communication in Medicine (DICOM) viewer OsiriX can be used for strategic and predictable type I thyroplasty. OBJECTIVES The aim of this study was to determine the efficacy of the preoperative planning of type I thyroplasty using the DICOM viewer OsiriX. METHODS Five patients with unilateral vocal cord paralysis and severe breathy dysphonia were included in this study. Multidetector computed tomography (CT) DICOM data were obtained and breath holding was performed during image acquisition. Using three-dimensional multiplanar reconstruction, we outlined the optimal location for a window. Type I thyroplasty was performed using Isshiki's original method, and only the placement of the window was decided according to the preoperative simulation point. To verify the advantages of this method, we compared our data with the previous data for total operation time and voice quality at 3 months after the operation without the DICOM viewer planning. RESULTS All patients are free from dysphonia and their glottic closures have resolved satisfactorily. Postoperative CT revealed that appropriate implant positioning resulted in successful surgical intervention. The comparison of total operation time showed that with the new method, operation duration was shortened by 12 min.
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Affiliation(s)
- Hirotaka Hara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine , Ube, Yamaguchi , Japan
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Hara H, Sugahara K, Hashimoto M, Mikuriya T, Tahara S, Yamashita H. Effectiveness of the leukotriene receptor antagonist pranlukast hydrate for the treatment of sleep disorder in patients with perennial allergic rhinitis. Acta Otolaryngol 2014; 134:307-13. [PMID: 24460152 DOI: 10.3109/00016489.2013.861926] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONCLUSION We found that addition of pranlukast to the conventional treatment for perennial allergic rhinitis may contribute to improvements in sleep disorder symptoms through a decrease in nasal congestion. OBJECTIVE We aimed to determine whether the leukotriene receptor antagonist pranlukast hydrate is effective in treating sleep disorder in patients with perennial allergic rhinitis. METHODS We conducted a questionnaire survey to determine the symptoms of rhinitis and sleep disturbances in 48 adult patients with perennial allergic rhinitis who visited the outpatient otolaryngology departments in hospitals in Yamaguchi Prefecture, Japan. The subjects presented with nasal symptoms and symptoms of sleep disorder during the last 2 weeks of treatment for allergic rhinitis that lasted for at least 1 month. A questionnaire based on the Pittsburgh Sleep Quality Index and Athens Insomnia Scale with some modifications was administered before and 4 weeks after the addition of pranlukast to the conventional treatment. RESULTS Addition of pranlukast improved the symptoms of perennial allergic rhinitis, with responses to all items of the questionnaire administered 4 weeks after pranlukast addition indicating significant improvements. Furthermore, the improvement in sleep disorder symptoms significantly correlated with improvement in nasal congestion, but not with improvements in sneezing and nasal discharge.
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Affiliation(s)
- Hirotaka Hara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine , Ube, Yamaguchi , Japan
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Affiliation(s)
- Hirotaka Hara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Kazuma Sugahara
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Hiroshi Yamashita
- Department of Otolaryngology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
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Alam M, Yoshizawa F, Sugahara K. Oral administration of lysine restores food intake and ventromedial hypothalamic dopamine in chicken on a lysine-free diet. Br Poult Sci 2012; 53:651-7. [DOI: 10.1080/00071668.2012.726349] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Toyota H, Shimogori H, Sugahara K, Yamashita H. A novel treatment for vestibular disorder with FGLM-NH2 plus SSSR. Neurosci Lett 2012; 526:128-32. [DOI: 10.1016/j.neulet.2012.08.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Revised: 07/25/2012] [Accepted: 08/14/2012] [Indexed: 11/26/2022]
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Fujiwara-Nagata E, Ikeda J, Sugahara K, Eguchi M. A novel genotyping technique for distinguishing between Flavobacterium psychrophilum isolates virulent and avirulent to ayu, Plecoglossus altivelis altivelis (Temminck & Schlegel). J Fish Dis 2012; 35:471-480. [PMID: 22536999 DOI: 10.1111/j.1365-2761.2012.01368.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We developed a simple genotyping method for Flavobacterium psychrophilum for analysing two single nucleotide polymorphisms (SNPs) in the gyrA gene and to distinguish between isolates that are virulent and avirulent to ayu, Plecoglossus altivelis altivelis (Temminck & Schlegel). The genotyping method is an on/off switch assay and is based on the polymerase chain reaction technique with phosphorothioated primers. We classified 232 isolates from four families of fish (i.e. Plecoglossidae, Osmeridae, Cyprinidae and Salmonidae) into four genotypes (G-C, A-T, A-C and G-T). The G-C type isolates exhibited strong pathogenicity to ayu, whereas the A-T and G-T types did not show any pathogenicity to this species. The A-C type exhibited no or weak pathogenicity to ayu. These results indicate that genotyping F. psychrophilum isolates with two SNPs from gyrA can clearly distinguish between isolates potentially harmful to ayu (G-C type) and those that are potentially not harmful or less harmful (A-C, A-T and G-T type). The on/off switch assay provides a quick, simple, and very powerful DNA genotyping technique for F. psychrophilum isolates.
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Sugahara K, Eguchi M. The use of warmed water treatment to induce protective immunity against the bacterial cold-water disease pathogen Flavobacterium psychrophilum in ayu (Plecoglossus altivelis). Fish Shellfish Immunol 2012; 32:489-493. [PMID: 22209763 DOI: 10.1016/j.fsi.2011.12.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Revised: 11/19/2011] [Accepted: 12/13/2011] [Indexed: 05/31/2023]
Abstract
We investigated the induction of protective immunity against bacterial cold-water disease (BCWD) caused by Flavobacterium psychrophilum by warmed water treatment in ayu (Plecoglossus altivelis). Fish were immersed in a live bacterial suspension (10⁷ CFU mL⁻¹) for 30 min and placed in 700 L concrete tanks. The 28 °C warmed water treatment lasted 3 days and began 1, 6, and 24 h after immersion in the live bacterial suspension. A naïve control fish group was immersed in a sterilized modified Cytophaga (MCY) broth instead of the bacterial suspension. Fourteen days after the immersion, agglutination antibody titers against F. psychrophilum were measured by using micro-titer methods. Fish were then exposed to a bacterial bath to infect them with live F. psychrophilum, and cumulative mortality was monitored. Fish treated with warmed water at 1, 6, and 24 h after immersion in the live bacterial suspension had cumulative mortalities of 36%, 30%, and 18%, respectively, all of which were significantly lower than the cumulative mortality of the naïve control fish (90%). Treated fish also showed high antibody titers against F. psychrophilum in agglutination tests. These results demonstrate that warmed water treatment could not only cure BCWD but also immunize the fish against the causative agent F. psychrophilum.
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Affiliation(s)
- K Sugahara
- Shiga Prefectural Fisheries Experimental Station, 2138-3 Hassakacho, Hikone, Shiga, Japan.
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Mori R, Murai A, Okumura J, Sugita S, Sugahara K, Furuse M. Effect of Cyclodextrins on Small Intestinal Mucosa and Glucose Absorption in the Rat. Journal of Applied Animal Research 2011. [DOI: 10.1080/09712119.2000.9706303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Mitarai S, Okumura M, Toyota E, Yoshiyama T, Aono A, Sejimo A, Azuma Y, Sugahara K, Nagasawa T, Nagayama N, Yamane A, Yano R, Kokuto H, Morimoto K, Ueyama M, Kubota M, Yi R, Ogata H, Kudoh S, Mori T. Evaluation of a simple loop-mediated isothermal amplification test kit for the diagnosis of tuberculosis. Int J Tuberc Lung Dis 2011; 15:1211-7, i. [DOI: 10.5588/ijtld.10.0629] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- S. Mitarai
- Department of Mycobacterium Reference and Research, Bacteriology Division, Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - M. Okumura
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - E. Toyota
- Department of Respiratory and Internal Medicine, National Hospital Organisation, Tokyo Hospital, Tokyo, Japan
| | - T. Yoshiyama
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - A. Aono
- Microbiology Laboratory, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - A. Sejimo
- Microbiology Laboratory, National Hospital Organisation, Tokyo Hospital, Tokyo, Japan
| | - Y. Azuma
- Microbiology Laboratory, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - K. Sugahara
- Microbiology Laboratory, National Hospital Organisation, Tokyo Hospital, Tokyo, Japan
| | - T. Nagasawa
- Microbiology Laboratory, National Hospital Organisation, Tokyo Hospital, Tokyo, Japan
| | - N. Nagayama
- Department of Respiratory and Internal Medicine, National Hospital Organisation, Tokyo Hospital, Tokyo, Japan
| | - A. Yamane
- Department of Respiratory and Internal Medicine, National Hospital Organisation, Tokyo Hospital, Tokyo, Japan
| | - R. Yano
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - H. Kokuto
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - K. Morimoto
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - M. Ueyama
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - M. Kubota
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - R. Yi
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - H. Ogata
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - S. Kudoh
- Department of Respiratory and Internal Medicine, Double-Barred Cross Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - T. Mori
- Department of Mycobacterium Reference and Research, Bacteriology Division, Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Tokyo, Japan
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Fuchigami T, Kakinohana O, Hefferan MP, Lukacova N, Marsala S, Platoshyn O, Sugahara K, Yaksh TL, Marsala M. Potent suppression of stretch reflex activity after systemic or spinal delivery of tizanidine in rats with spinal ischemia-induced chronic spastic paraplegia. Neuroscience 2011; 194:160-9. [PMID: 21871540 DOI: 10.1016/j.neuroscience.2011.08.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2011] [Revised: 07/23/2011] [Accepted: 08/11/2011] [Indexed: 10/17/2022]
Abstract
BACKGROUND Spasticity and rigidity are serious complications associated with spinal traumatic or ischemic injury. Clinical studies show that tizanidine (Tiz) is an effective antispasticity agent; however, the mechanism of this effect is still not clear. Tiz binds not only to α2-adrenoreceptors (AR) but also to imidazoline (I) receptors. Both receptor systems (AR+I) are present in the spinal cord interneurons and α-motoneurons. The aim of the present study was to evaluate the therapeutic potency of systematically or spinally (intrathecally [IT]) delivered Tiz on stretch reflex activity (SRA) in animals with ischemic spasticity, and to delineate supraspinal or spinal sites of Tiz action. EXPERIMENTAL PROCEDURES Animals were exposed to 10 min of spinal ischemia to induce an increase in SRA. Increase in SRA was identified by simultaneous increase in recorded electromyography (EMG) activity and ankle resistance measured during computer-controlled ankle dorsiflexion (40°/3 s) in fully awake animals. Animals with increased SRA were divided into several experimental subgroups and treated as follows: (i) Tiz administered systemically at the dose of 1 mg kg(-1), or IT at 10 μg or 50 μg delivered as a single dose; (ii) treatment with systemic Tiz was followed by the systemic injection of vehicle, or by nonselective AR antagonist without affinity for I receptors; yohimbine (Yoh), α2A AR antagonist; BRL44408 (BRL), α2B AR antagonist; ARC239 (ARC), nonselective AR and I(1) receptor antagonist; efaroxan (Efa), or nonselective AR and I(2) receptor antagonist; idazoxan (Ida); (iii) treatment with IT Tiz was followed by the IT injection of selective α2A AR antagonist; atipamezole (Ati). In a separate group of spastic animals the effect of systemic Tiz treatment (1 mg/kg) or isoflurane anesthesia on H-reflex activity was also studied. RESULTS Systemic and/or IT treatment with Tiz significantly suppressed SRA. This Tiz-mediated anti-SRA effect was reversed by BRL (5 mg kg(-1)), Efa (1 mg kg(-1)), and Ida (1 mg kg(-1)). No reversal was seen after Yoh (3 mg kg(-1)) or ARC (5 mg kg(-1)) treatment. Anti-SRA induced by IT Tiz (50 μg) was reversed by IT injection of Ati (50 μg). Significant suppression of H-reflex was measured after systemic Tiz treatment (1 mg/kg) or isoflurane (2%) anesthesia, respectively. Immunofluorescence staining of spinal cord sections taken from animals with spasticity showed upregulation of α2A receptor in activated astrocytes. CONCLUSIONS These data suggest that α2A AR and I receptors, but not α2B AR, primarily mediate the Tiz-induced antispasticity effect. This effect involves spinal and potentially supraspinal sites and likely targets α2A receptor present on spinal neurons, primary afferents, and activated astrocytes. Further studies using highly selective antagonists are needed to elucidate the involvement of specific subtypes of the AR and I receptors in the antispasticity effect seen after Tiz treatment.
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Affiliation(s)
- T Fuchigami
- Department of Anesthesiology, University of the Ryukyus, Okinawa, Japan
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Khalil A, Ichijo A, Yoshizawa F, Sugahara K. Effect of surgery for cannula implantation into the hypothalamus on the behaviour and neural activity of broiler chicks. Br Poult Sci 2010; 51:146-51. [DOI: 10.1080/00071660903394448] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hasegawa H, Yamada Y, Iha H, Tsukasaki K, Nagai K, Atogami S, Sugahara K, Tsuruda K, Ishizaki A, Kamihira S. Activation of p53 by Nutlin-3a, an antagonist of MDM2, induces apoptosis and cellular senescence in adult T-cell leukemia cells. Leukemia 2009; 23:2090-101. [PMID: 19710698 DOI: 10.1038/leu.2009.171] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
It has been reported that the induction of cellular senescence through p53 activation is an effective strategy in tumor regression. Unfortunately, however, tumors including adult T-cell leukemia/lymphoma (ATL) have disadvantages such as p53 mutations and a lack of p16(INK4a) and/or p14(ARF). In this study we characterized Nutlin-3a-induced cell death in 16 leukemia/lymphoma cell lines. Eight cell lines, including six ATL-related cell lines, had wild-type p53 and Nutlin-3a-activated p53, and the cell lines underwent apoptosis or cell-cycle arrest, whereas eight cell lines with mutated p53 were resistant. Interestingly, senescence-associated-beta-galactosidase (SA-beta-gal) staining revealed that only ATL-related cell lines with wild-type p53 showed cellular senescence, although they lack both p16(INK4a) and p14(ARF). These results indicate that cellular senescence is an important event in p53-dependent cell death in ATL cells and is inducible without p16(INK4a) and p14(ARF). Furthermore, knockdown of Tp53-induced glycolysis and apoptosis regulator (TIGAR), a novel target gene of p53, by small interfering RNA(siRNA) indicated its important role in the induction of cellular senescence. As many patients with ATL carry wild-type p53, our study suggests that p53 activation by Nutlin-3a is a promising strategy in ATL. We also found synergism with a combination of Nutlin-3a and tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), suggesting the application of Nutlin-3a-based therapy to be broader than expected.
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Affiliation(s)
- H Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Tomochika K, Ichiyama T, Shimogori H, Sugahara K, Yamashita H, Furukawa S. Clinical characteristics of respiratory syncytial virus infection-associated acute otitis media. Pediatr Int 2009; 51:484-7. [PMID: 19674360 DOI: 10.1111/j.1442-200x.2008.02768.x] [Citation(s) in RCA: 4] [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: 12/01/2022]
Abstract
BACKGROUND It is known that children with respiratory syncytial virus (RSV) infection frequently have complications of acute otitis media (AOM). METHODS The hospital records of 148 inpatients aged 6-35 months who had RSV infection between January 2004 and December 2007, were retrospectively investigated. RESULTS Forty-six out of 148 children (31%) had AOM. There was a significantly greater number of children with fever who had AOM (P = 0.005). The percentage of children with beta-lactamase-non-producing ampicillin-resistant (BLNAR) Haemophilus influenzae in nasopharyngeal culture who had AOM showed a tendency to be greater than that of those who did not have AOM, but this was not statistically significant (P = 0.068). Moreover, BLNAR H. influenzae was positive in middle ear fluid specimens from four of five children with AOM who underwent tympanocentesis. There were no significant differences in the incidence of lower airway infection, leukocytes counts, or serum C-reactive protein levels between children with and without AOM. CONCLUSIONS Children who had RSV infection with AOM had a higher incidence of fever than those without AOM.
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Affiliation(s)
- Kiyoko Tomochika
- Department of Pediatrics, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
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Tuysuz B, Mizumoto S, Sugahara K, Celebi A, Mundlos S, Turkmen S. Omani-type spondyloepiphyseal dysplasia with cardiac involvement caused by a missense mutation in CHST3. Clin Genet 2009; 75:375-83. [PMID: 19320654 DOI: 10.1111/j.1399-0004.2009.01167.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
We describe a family with progressive skeletal dysplasia and severe spinal involvement, short stature, premature arthrosis and joint contractures diagnosed as spondyloepiphyseal dysplasia Omani type. Mutation analysis in CHST3, the gene encoding for the chondroitin 6-O-sulfotransferase-1 (C6ST-1), revealed a homozygous missense mutation (T141M) in exon 3 in all three affected members of the family. Using recombinant C6ST-1, we showed that the identified missense mutation results in a reduction of C6ST-1 activity to 24-29% of the wild type protein. In addition to the previously noted skeletal features, affected members of this family also had cardiac involvement including mitral, tricuspid and/or aortic regurgitations and type E brachydactyly.
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Affiliation(s)
- B Tuysuz
- Department of Pediatric Genetics, Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey.
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Basappa, Murugan S, Sugahara KN, Lee CM, ten Dam GB, van Kuppevelt TH, Miyasaka M, Yamada S, Sugahara K. Involvement of chondroitin sulfate E in the liver tumor focal formation of murine osteosarcoma cells. Glycobiology 2009; 19:735-42. [DOI: 10.1093/glycob/cwp041] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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Onimaru Y, Tsukasaki K, Murata K, Imaizumi Y, Choi YL, Hasegawa H, Sugahara K, Yamada Y, Hayashi T, Nakashima M, Taguchi T, Mano H, Kamihira S, Tomonaga M. Autocrine and/or paracrine growth of aggressive ATLL cells caused by HGF and c-Met. Int J Oncol 2008; 33:697-703. [PMID: 18813782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
Adult T-cell leukemia/lymphoma (ATLL) is a neoplasia characterized by the massive invasion of various organs by tumor cells. Previously, we found that expression of the gene for c-Met, a receptor tyrosine kinase for hepatocyte growth factor (HGF), was specific to the acute type among 41 patients with ATLL by microarray. First in the present study, we analyzed the survival of the patients in relation to expression of c-Met and HGF in ATLL cells. Expression of the former but not the latter was associated with poor prognosis. Then, we analyzed the growth of ATLL cells caused by HGF and c-Met. c-Met was expressed in 0/7 chronic ATLLs, 12/14 acute ATLLs, 1/1 IL-2-independent ATLL cell line and 1/7 IL-2-dependent ATLL cell lines as assessed by flow cytometry. HGF induced the proliferation of primary cells from most acute cases examined as well as the c-Met-positive KK1 cell line in contrast to c-Met-negative cells. HGF induced autophosphorylation of c-Met in c-Met-positive cells from an acute case and KK1 cells. The plasma level of HGF was elevated in acute as compared to chronic cases. The levels of HGF and/or IL-6 which induces the production of HGF by stromal cells, were elevated in the supernatant of short-term cultured cells from certain patients with acute or chronic disease. Finally, infiltrated ATLL cells and adjacent stromal cells in liver were shown to be positive for c-Met/HGF and HGF, respectively, in acute cases. Autocrine and/or paracrine growth caused by HGF and c-Met was suggested in aggressive ATLL cells secreting HGF and/or IL-6, respectively.
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Affiliation(s)
- Y Onimaru
- Department of Hematology and Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8523, Japan
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