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Iwanaga J, Kitagawa N, Fukino K, Kikuta S, Tubbs RS, Yoda T. Perforation of the temporomandibular joint disc: cadaveric anatomical study. Int J Oral Maxillofac Surg 2024; 53:422-429. [PMID: 37985265 DOI: 10.1016/j.ijom.2023.10.033] [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: 08/15/2023] [Revised: 10/30/2023] [Accepted: 10/31/2023] [Indexed: 11/22/2023]
Abstract
The aim of this human cadaveric study was to investigate the relationship between temporomandibular joint disc perforation and bony changes of the mandibular condyle. Overall, 135 cadaveric mandibles were used (69 male, 66 female; all White). Mean age at death was 78.7 years. Perforation of the disc was investigated. Differences in the area of the perforation according to the different types of bony change (erosion, flattening, osteophyte) were evaluated. Perforation of the disc was observed in 34.8% of all mandibles, occurring unilaterally in 53.2% of cases and bilaterally in 46.8%. The prevalence of perforation was 16.4% in cadavers <80 years old (67 heads) and 52.9% in those ≥80 years old (68 heads) (P < 0.001). Osteophyte formation was always identified along with other bony changes (21.7%) and never in isolation. The area of the perforation was significantly larger in the groups with bony changes (one, two, or three changes) than in the 'no bony change' group. The group with osteophyte formation showed a significantly larger perforated area than the group without osteophyte formation; likewise, the group with flattening showed a significantly larger perforated area than the group without flattening. Osteophytes and flattening are probably secondary bony changes that occur following disc perforation. Based on this study, disc perforation should be suspected when these findings are identified on imaging.
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Affiliation(s)
- J Iwanaga
- Department of Oral and Maxillofacial Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan; Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA; Division of Gross and Clinical Anatomy, Department of Anatomy, Kurume University School of Medicine, Kurume, Fukuoka, Japan.
| | - N Kitagawa
- Department of Oral and Maxillofacial Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - K Fukino
- Department of Oral and Maxillofacial Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - S Kikuta
- Dental and Oral Medical Center, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| | - R Shane Tubbs
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA; Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, LA, USA; Department of Anatomical Sciences, St. George's University, St. George's, Grenada
| | - T Yoda
- Department of Maxillofacial Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Han B, Kamogashira T, Kikuta S, Yamasoba T. Endoplasmic reticulum stress associated with lead (Pb)-induced olfactory epithelium toxicity in an olfactory dark basal cell line. FEBS Open Bio 2023; 13:2162-2171. [PMID: 37803507 PMCID: PMC10699098 DOI: 10.1002/2211-5463.13714] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 08/08/2023] [Accepted: 10/02/2023] [Indexed: 10/08/2023] Open
Abstract
Lead (Pb) can damage organs and also have undesirable effects on neural development. To explore the effects of Pb on olfactory cells, we investigated Pb-induced cell toxicity in the DBC1.2 olfactory cell line, with a focus on endoplasmic reticulum (ER) stress, apoptosis, and necroptosis. Representative markers of ER stress, apoptosis, and necroptosis were analyzed by quantitative PCR. The mRNA expression levels of GRP94, GRP78, spliced XBP1, PERK, and ATF6 increased significantly after Pb exposure in a dose-dependent manner. The expression of Caspase 3 and Caspase 12 did not increase after Pb exposure, which suggested that apoptosis-induced cell death was not activated after Pb exposure. However, the mRNA of RIPK3 and MLKL showed increases in expression, which indicated that necroptosis-induced cell death was activated after Pb exposure. These results indicate that Pb exposure induced dose-dependent cytotoxicity through ER stress and necroptosis pathways in DBC1.2 cells, whereas the apoptosis pathway was not significantly stimulated. HEPES buffer showed a partial protective effect in terms of ER stress, apoptosis, and necroptosis. In summary, the necroptosis pathway plays a crucial rule in Pb exposure-induced cytotoxicity in olfactory cells.
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Affiliation(s)
- Bing Han
- Department of Otolaryngology and Head and Neck Surgery, Faculty of MedicineUniversity of TokyoTokyoJapan
| | - Teru Kamogashira
- Department of Otolaryngology and Head and Neck Surgery, Faculty of MedicineUniversity of TokyoTokyoJapan
| | - Shu Kikuta
- Department of Otolaryngology and Head and Neck Surgery, Faculty of MedicineUniversity of TokyoTokyoJapan
- Department of Otolaryngology and Head and Neck SurgeryNihon UniversityTokyoJapan
| | - Tatsuya Yamasoba
- Department of Otolaryngology and Head and Neck Surgery, Faculty of MedicineUniversity of TokyoTokyoJapan
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Kikuta S, Han B, Yamasoba T. Heterogeneous Damage to the Olfactory Epithelium in Patients with Post-Viral Olfactory Dysfunction. J Clin Med 2023; 12:5007. [PMID: 37568409 PMCID: PMC10419384 DOI: 10.3390/jcm12155007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/27/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023] Open
Abstract
OBJECTIVES Post-viral olfactory dysfunction (PVOD) is a neurogenic disorder caused by a common cold virus. Based on the homology of deduced amino acid sequences, olfactory sensory neurons (OSNs) in both mice and humans express either class I or class II odorant receptor genes encoding class I and class II OSNs. The purpose of this study was to determine whether OSN damage in PVOD occurs uniformly in both neuron types. MATERIALS AND METHODS The characteristics of PVOD patients were compared with those of patients with chronic rhinosinusitis (CRS) or post-traumatic olfactory dysfunction (PTOD). Briefly, subjects underwent orthonasal olfaction tests using five different odors (T&T odors) and a retronasal olfaction test using a single odor (IVO odor). The regions in the mouse olfactory bulb (OB) activated by the T&T and the IVO odors were also examined. RESULTS Multivariate analysis of 307 cases of olfactory dysfunction (PVOD, 118 cases; CRS, 161 cases; and PTOD, 28 cases) revealed that a combination of responses to the IVO odor, but not to the T&T odors, is characteristic of PVOD, with high specificity (p < 0.001). Imaging analysis of GCaMP3 mice showed that the IVO odor selectively activated the OB region in which the axons of class I OSNs converged, whereas the T&T odors broadly activated the OB region in which axons of class I and class II OSNs converged. CONCLUSIONS A response to T&T odors, but not IVO odor, in PVOD suggests that class I OSNs are injured preferentially, and that OSN damage in PVOD may occur heterogeneously in a neuron-type-dependent manner.
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Affiliation(s)
- Shu Kikuta
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine, Nihon University, 30-1, Oyaguchi Kami-cho, Itabashi-ku, Tokyo 173-8610, Japan
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan; (B.H.); (T.Y.)
| | - Bing Han
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan; (B.H.); (T.Y.)
| | - Tatsuya Yamasoba
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan; (B.H.); (T.Y.)
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Hasegawa H, Shinya Y, Ono M, Kikuta S, Kondo K, Saito N. Kashimé: A Novel Knotless Surgical Suture to Simplify Dural Stitches in Endoscopic Transnasal Surgery. Oper Neurosurg (Hagerstown) 2023; 24:417-424. [PMID: 36701657 DOI: 10.1227/ons.0000000000000545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 09/26/2022] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Dural suturing is an effective adjunct to skull base dural repair in endoscopic transnasal surgery, although it is technically cumbersome. Here, we presented a novel surgical suture "Kashimé" (Kono Seisakusho) that can be tightened without tying. OBJECTIVE To examine the efficacy of Kashimé for skull base dural repair in endoscopic transnasal surgery. METHODS Kashimé was used in 8 patients with skull base dural defects during nonpedicled flap-based multilayered skull base reconstruction to close or approximate the gaps between the dural edges or secure a free fascial graft. The time required for each dural stitch (passing a needle through the dura, pulling out the thread, and tightening it) and the incidence of postoperative cerebrospinal fluid leakage were the study end points. RESULTS Based on our preliminary experiences with 12 stitches used, no postoperative cerebrospinal fluid leakage was observed. The learning curve was steep, and the mean (±SD) time was 127 (±44) seconds for a single stitching procedure, except for the first case. Regarding the metal artifact, although a beam hardening artifact was not observed on computed tomography, a 4- to 9-mm diameter image defect was observed on magnetic resonance imaging. CONCLUSION Kashimé can help surgeons to complete a single dural stitch in endoscopic transnasal surgery for approximately 2 minutes. It may be an optimal tool for skull base reconstruction, but the efficacy and safety need to be investigated.
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Affiliation(s)
- Hirotaka Hasegawa
- Department of Neurosurgery, The University of Tokyo, Bunkyo, Tokyo, Japan
| | - Yuki Shinya
- Department of Neurosurgery, The University of Tokyo, Bunkyo, Tokyo, Japan
| | - Minoru Ono
- Department of Cardiac Surgery, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan
| | - Shu Kikuta
- Department of Otorhinolaryngology, The University of Tokyo, Bunkyo, Tokyo, Japan
| | - Kenji Kondo
- Department of Otorhinolaryngology, The University of Tokyo, Bunkyo, Tokyo, Japan
| | - Nobuhito Saito
- Department of Neurosurgery, The University of Tokyo, Bunkyo, Tokyo, Japan
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Hasegawa H, Shin M, Shinya Y, Kashiwabara K, Kikuta S, Kondo K, Saito N. Long-term outcomes of non-vascularized multilayer fascial closure technique for dural repair in endoscopic transnasal surgery: the efficacy, durability, and limitations. World Neurosurg 2023:S1878-8750(23)00330-3. [PMID: 36914030 DOI: 10.1016/j.wneu.2023.03.035] [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: 01/25/2023] [Revised: 03/07/2023] [Accepted: 03/08/2023] [Indexed: 03/13/2023]
Abstract
OBJECTIVE Non-vascularized multilayer fascial closure technique (NMFCT) can be used instead of nasoseptal flap reconstruction for dural repair in endoscopic transnasal surgery (ETS); however, due to the lack of blood supply, its long-term durability and possible limitations need to be clarified. METHODS This was a retrospective study on patients who underwent ETS with intraoperative cerebrospinal fluid (CSF) leakage. We assessed the postoperative and delayed CSF leakage rates and the associated risk factors. RESULTS Among 200 ETSs with intraoperative CSF leakage, 148 (74.0%) ETSs were performed for skull base pathologies other than pituitary neuroendocrine tumor. The mean follow-up period was 34.4 months. Esposito grade 3 leakage was confirmed in 148 (74.0%) cases. NMFCT was used either with (67 [33.5%]) or without (133 [66.5%]) lumbar drainage. There were 10 cases (5.0%) of postoperative CSF leakage that necessitated reoperation. In 4 other cases (2.0%), CSF leakage was suspected but lumbar drainage alone successfully restored the condition. Multivariate logistic regression analyses revealed that posterior skull base location (P < 0.01, odds ratio 11.5, 95% confidence interval 1.99-2.17 × 102) and craniopharyngioma pathology (P = 0.03, odds ratio 9.4, 95% confidence interval 1.25-1.92 × 102) were significantly associated with postoperative CSF leakage. No delayed leakage occurred during the observation period except for two patients who underwent multiple radiotherapies. CONCLUSIONS NMFCT is a reasonable alternative with long-term durability, though vascularized flap may be a better choice for cases in which vascularity of the surrounding tissues is significantly impaired due to interventions including multiple radiotherapies.
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Affiliation(s)
- Hirotaka Hasegawa
- Departments of Neurosurgery and The University of Tokyo, Bunkyo, Tokyo, Japan.
| | - Masahiro Shin
- Departments of Neurosurgery and The University of Tokyo, Bunkyo, Tokyo, Japan; Department of Neurosurgery, Teikyo University, Itabashi, Tokyo, Japan
| | - Yuki Shinya
- Departments of Neurosurgery and The University of Tokyo, Bunkyo, Tokyo, Japan
| | - Kosuke Kashiwabara
- Department of Biostatistics, School of Public Health, Graduate School of Medicine, University of Tokyo, Bunkyo, Tokyo, Japan
| | - Shu Kikuta
- Departments of Otorhinolaryngology, The University of Tokyo, Bunkyo, Tokyo, Japan
| | - Kenji Kondo
- Departments of Otorhinolaryngology, The University of Tokyo, Bunkyo, Tokyo, Japan
| | - Nobuhito Saito
- Departments of Neurosurgery and The University of Tokyo, Bunkyo, Tokyo, Japan
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Han B, Kikuta S, Kamogashira T, Kondo K, Yamasoba T. Sleep deprivation induces delayed regeneration of olfactory sensory neurons following injury. Front Neurosci 2022; 16:1029279. [DOI: 10.3389/fnins.2022.1029279] [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] [Received: 08/27/2022] [Accepted: 11/16/2022] [Indexed: 12/05/2022] Open
Abstract
The circadian system, which is essential for the alignment of sleep/wake cycles, modulates adult neurogenesis. The olfactory epithelium (OE) has the ability to generate new neurons throughout life. Loss of olfactory sensory neurons (OSNs) as a result of injury to the OE triggers the generation of new OSNs, which are incorporated into olfactory circuits to restore olfactory sensory perception. This regenerative potential means that it is likely that the OE is substantially affected by sleep deprivation (SD), although how this may occur remains unclear. The aim of this study is to address how SD affects the process of OSN regeneration following OE injury. Mice were subjected to SD for 2 weeks, which induced changes in circadian activity. This condition resulted in decreased activity during the night-time and increased activity during the daytime, and induced no histological changes in the OE. However, when subjected to SD during the regeneration process after OE injury, a significant decrease in the number of mature OSNs in the dorsomedial area of the OE, which is the only area containing neurons expressing NQO1 (quinone dehydrogenase 1), was observed compared to the NQO1-negative OE. Furthermore, a significant decrease in proliferating basal cells was observed in the NQO1-positive OE compared to the NQO1-negative OE, but no increase in apoptotic OSNs was observed. These results indicate that SD accompanied by disturbed circadian activity could induce structurally negative effects on OSN regeneration, preferentially in the dorsomedial area of the OE, and that this area-specific regeneration delay might involve the biological activity of NQO1.
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Kikuta S, Han B, Yoshihara S, Nishijima H, Kondo K, Yamasoba T. High CT Attenuation Values Relative to the Brainstem Predict Fungal Hyphae Within the Sinus. Front Surg 2022; 9:876340. [PMID: 35784936 PMCID: PMC9243468 DOI: 10.3389/fsurg.2022.876340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 05/30/2022] [Indexed: 11/25/2022] Open
Abstract
Objectives There is currently no established objective diagnostic indicator for the differentiation of sinus fungal ball (SFB) from unilateral nonfungal chronic sinusitis (UCRS). This study evaluated whether computed tomography (CT) attenuation values relative to those of the brainstem (relative CT number) are useful for differentiating SFB from UCRS. Materials and Methods Consecutive patients who were pathologically diagnosed with SFB or UCRS between 2013 and 2021 were retrospectively identified. The relative CT numbers of region of interest (ROIs) within the sinuses were compared between the two patient groups. Factors with predictive power for differentiating SFBs from UCRSs were identified by uni/multivariable logistic regression analyses. Results One hundred and eighty-three patients with unilateral chronic sinusitis were finally analyzed (SFB, 86 cases; UCRS, 97 cases). Regardless of the presence or absence of calcified lesions, the relative CT numbers in SFB were significantly higher than those in UCRS. ROIs showing high relative CT numbers were those where fungal hyphae were present. In the uni/multivariable logistic regression analysis, age (p < 0.001), relative CT number (p < 0.001), and calcification (p = 0.002) had predictive value for distinguishing SFB from UCRS. Within those cases not showing calcification, age (p = 0.004) and relative CT number (p < 0.001) were predictive factors for differentiating SFB from UCRS. A relative CT number >1.5 was significantly associated with SFB (sensitivity, 70%; specificity, 91%), with a significantly larger area under the receiver operating characteristics curve than age. Conclusions High relative CT numbers within the sinus are strongly associated with the presence of fungal hyphae, and measurement of relative CT number is a powerful adjunctive diagnostic method for distinguishing between SFB and UCRS.
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Kikuta S, Kuboki A, Yamasoba T. Protective Effect of Insulin in Mouse Nasal Mucus Against Olfactory Epithelium Injury. Front Neural Circuits 2022; 15:803769. [PMID: 35002636 PMCID: PMC8733614 DOI: 10.3389/fncir.2021.803769] [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: 10/28/2021] [Accepted: 11/26/2021] [Indexed: 11/15/2022] Open
Abstract
Insulin is present in nasal mucus and plays an important role in the survival and activity of individual olfactory sensory neurons (OSNs) via insulin receptor-mediated signaling. However, it is unclear whether insulin acts prophylactically against olfactotoxic drug-induced olfactory epithelium (OE) injury, and whether the degree of damage is affected by the concentration of insulin in the nasal mucus. The apoptosis-inducing drug methimazole was administered to the nasal mucus of diabetic and normal mice along with different concentrations of insulin. Immunohistochemical analysis was used to assess the relationship between damage to the OE and the mucus insulin concentration and the protective effect of insulin administration against eosinophilic cationic protein (ECP)-induced OE injury. Diabetic mice had lower concentrations of insulin in their nasal mucus than normal mice (diabetic vs. normal mice, p < 0.001). Methimazole administration reduced the number of OSNs in normal mice and had a more marked effect in diabetic mice. However, unilateral insulin administration prevented the methimazole-induced reduction in the number of OSNs on the ipsilateral side but not on the contralateral side (OSNs; Insulin vs. contralateral side, p < 0.001). Furthermore, intranasal ECP administration damaged the OE by inducing apoptosis (OSNs; ECP vs. contralateral side, p < 0.001), but this damage was largely prevented by insulin administration (OSNs; Insulin + ECP vs. contralateral side, p = 0.36), which maintained the number of mature OSNs. The severity of methimazole-induced damage to the OE is related to the insulin concentration in the nasal mucus (Correlation between the insulin concentration in nasal mucus and the numbers of OSNs, R2 = 0.91, p < 0.001), which may imply that nasal insulin protects OSNs and that insulin administration might lead to the development of new therapeutic agents for ECP-induced OE injury.
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Affiliation(s)
- Shu Kikuta
- Department of Otorhinolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, Bunkyo, Japan
| | - Akihito Kuboki
- Department of Otorhinolaryngology, The Jikei University School of Medicine, Minato, Japan
| | - Tatsuya Yamasoba
- Department of Otorhinolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, Bunkyo, Japan
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Omura K, Han B, Nishijima H, Aoki S, Ebihara T, Kondo K, Otori N, Kojima H, Yamasoba T, Kikuta S. Heterogeneous distribution of mature olfactory sensory neurons in human olfactory epithelium. Int Forum Allergy Rhinol 2021; 12:266-277. [PMID: 34538025 DOI: 10.1002/alr.22885] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/28/2021] [Accepted: 07/29/2021] [Indexed: 11/07/2022]
Abstract
BACKGROUND The olfactory cleft (OC) comprising the olfactory epithelium (OE) is the most important anatomical location for olfactory function. Endoscopic sinus surgery (ESS) is used to treat diseases related to the OC and improve olfactory dysfunction. However, iatrogenic OE injury occasionally occurs. Comprehensive knowledge of the olfactory region is required to avoid damage to the OE during endoscopic procedures. METHODS Immunohistochemistry was performed on olfactory mucosa obtained from the unaffected side of olfactory neuroblastoma surgical specimens. The OE was defined as the epithelium containing mature olfactory sensory neurons (OSNs). The distribution and cell kinetics of the OE were examined. RESULTS The OE was selectively localized to the anterior two-thirds of the superior turbinate (ST) and in the nasal septum (NS) just opposite to the ST; the OE was not detected within the mucosa of the superior meatus. The density of mature OSNs was high at the ethmoid tegmen but gradually decreased with distance from the ethmoid tegmen. The extent of cell death and proliferation was relatively even across the OE. Analysis of airflow profiles revealed that resection of inferior ST does not decrease airflow to the OC. CONCLUSION The results indicate that the distribution and degree of differentiation of mature OSNs are heterogenous throughout the OE. Epithelial resection of the anterior or superior ST has the potential to damage olfactory function. Resection of the inferior or posterior ST or widening of the superior meatus is a safer alternative that does not damage mature OSNs or alter airflow to the OC.
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Affiliation(s)
- Kazuhiro Omura
- Department of Otorhinolaryngology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Bing Han
- Department of Otorhinolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Hironobu Nishijima
- Department of Otorhinolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Satoshi Aoki
- Department of Otorhinolaryngology, Dokkyo Medical University Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Teru Ebihara
- Department of Otorhinolaryngology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Kenji Kondo
- Department of Otorhinolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Nobuyoshi Otori
- Department of Otorhinolaryngology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Hiromi Kojima
- Department of Otorhinolaryngology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Tatsuya Yamasoba
- Department of Otorhinolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Shu Kikuta
- Department of Otorhinolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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Kagoya R, Kondo K, Kishimoto‐Urata M, Shimizu Y, Kikuta S, Yamasoba T. A murine model of eosinophilic chronic rhinosinusitis using the topical application of a vitamin D3 analog. Allergy 2021; 76:1432-1442. [PMID: 33058214 DOI: 10.1111/all.14627] [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: 04/09/2020] [Revised: 08/31/2020] [Accepted: 09/17/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Eosinophilic chronic rhinosinusitis (ECRS) is a chronic inflammatory disease, characterized by eosinophilic infiltration, T-helper type 2 (Th2-type) response, and olfactory dysfunction. A master regulator of Th2-type inflammation, thymic stromal lymphopoietin (TSLP), is important for basophil activation. TSLP-elicited basophils are a key factor in the pathogenesis of ECRS. METHODS In order to elucidate the mechanisms of ECRS in humans, we aimed to establish a murine model of ECRS based on TSLP production in response to the topical application of MC903 (a vitamin D3 analog) and the subsequent TSLP-induced basophil activation. Histological analyses were performed to assess immune cell infiltration into the nasal mucosa and to explore the impact of eosinophilic inflammation on the olfactory epithelium. The status of Th2-type inflammation was evaluated by quantitative real-time PCR and enzyme-linked immunosorbent assay (ELISA). RESULTS Eosinophils, basophils, and M2 macrophages increased significantly in the nasal mucosa of the mice treated with MC903 and ovalbumin (OVA), compared to those treated with OVA alone or the controls. Quantitative real-time PCR and ELISA revealed elevated expression of interleukin (IL)-4, IL-5, IL-13, TSLP, the chemokine CCL11, and CCL24 in the nasal mucosa of the ECRS mice. In parallel, thinned olfactory epithelium and decreased mature olfactory sensory neurons were observed in the ECRS mice. CONCLUSIONS Our model of ECRS displayed Th2-type inflammation in the sinonasal region, including both eosinophil infiltration and basophil infiltration. Additionally, olfactory epithelium turned out to be affected by eosinophilic inflammation. These features are consistent with the characteristics of the human ECRS.
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Affiliation(s)
- Ryoji Kagoya
- Department of Otorhinolaryngology–Head and Neck Surgery Graduate School of Medicine The University of Tokyo Tokyo Japan
- Department of Otolaryngology Teikyo University Tokyo Japan
| | - Kenji Kondo
- Department of Otorhinolaryngology–Head and Neck Surgery Graduate School of Medicine The University of Tokyo Tokyo Japan
| | - Megumi Kishimoto‐Urata
- Department of Otorhinolaryngology–Head and Neck Surgery Graduate School of Medicine The University of Tokyo Tokyo Japan
| | - Yuya Shimizu
- Department of Otorhinolaryngology–Head and Neck Surgery Graduate School of Medicine The University of Tokyo Tokyo Japan
- Department of Otolaryngology Teikyo University Tokyo Japan
| | - Shu Kikuta
- Department of Otorhinolaryngology–Head and Neck Surgery Graduate School of Medicine The University of Tokyo Tokyo Japan
| | - Tatsuya Yamasoba
- Department of Otorhinolaryngology–Head and Neck Surgery Graduate School of Medicine The University of Tokyo Tokyo Japan
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Kuboki A, Kikuta S, Otori N, Kojima H, Matsumoto I, Reisert J, Yamasoba T. Insulin-Dependent Maturation of Newly Generated Olfactory Sensory Neurons after Injury. eNeuro 2021; 8:ENEURO.0168-21.2021. [PMID: 33906971 PMCID: PMC8143024 DOI: 10.1523/eneuro.0168-21.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 04/20/2021] [Indexed: 12/24/2022] Open
Abstract
Loss of olfactory sensory neurons (OSNs) after injury to the olfactory epithelium (OE) triggers the generation of OSNs that are incorporated into olfactory circuits to restore olfactory sensory perception. This study addresses how insulin receptor-mediated signaling affects the functional recovery of OSNs after OE injury. Insulin levels were reduced in mice by ablating the pancreatic β cells via streptozotocin (STZ) injections. These STZ-induced diabetic and control mice were then intraperitoneally injected with the olfactotoxic drug methimazole to selectively ablate OSNs. The OE of diabetic and control mice regenerated similarly until day 14 after injury. Thereafter, the OE of diabetic mice contained fewer mature and more apoptotic OSNs than control mice. Functionally, diabetic mice showed reduced electro-olfactogram (EOG) responses and their olfactory bulbs (OBs) had fewer c-Fos-active cells following odor stimulation, as well as performed worse in an odor-guided task compared with control mice. Insulin administered intranasally during days 8-13 after injury was sufficient to rescue recovery of OSNs in diabetic mice compared with control levels, while insulin administration between days 1 and 6 did not. During this critical time window on days 8-13 after injury, insulin receptors are highly expressed and intranasal application of an insulin receptor antagonist inhibits regeneration. Furthermore, an insulin-enriched environment could facilitate regeneration even in non-diabetic mice. These results indicate that insulin facilitates the regeneration of OSNs after injury and suggest a critical stage during recovery (8-13 d after injury) during which the maturation of newly generated OSNs is highly dependent on and promoted by insulin.
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Affiliation(s)
- Akihito Kuboki
- Department of Otolaryngology, Jikei University School of Medicine, Tokyo 105-8461, Japan
- Monell Chemical Senses Center, Philadelphia, PA 19104
| | - Shu Kikuta
- Department of Otolaryngology, Graduate School of Medicine, University of Tokyo, Tokyo 113-8655, Japan
| | - Nobuyoshi Otori
- Department of Otolaryngology, Jikei University School of Medicine, Tokyo 105-8461, Japan
| | - Hiromi Kojima
- Department of Otolaryngology, Jikei University School of Medicine, Tokyo 105-8461, Japan
| | | | | | - Tatsuya Yamasoba
- Department of Otolaryngology, Graduate School of Medicine, University of Tokyo, Tokyo 113-8655, Japan
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Sano N, Kikuta S, Kondo K, Yamasoba T. High CT values relative to the brainstem differentiate inverted papillomas from nasal polyps. Auris Nasus Larynx 2021; 48:905-913. [PMID: 33810925 DOI: 10.1016/j.anl.2021.02.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 02/09/2021] [Accepted: 02/16/2021] [Indexed: 01/02/2023]
Abstract
OBJECTIVES A diagnostic indicator for the differentiation of inverted papillomas (IPs) from inflammatory nasal polyps (NPs) has not been established. This study aimed to evaluate whether CT attenuation values relative to those of the brainstem (relative CT number) could be useful for differentiating IPs from NPs. MATERIAL AND METHODS Consecutive patients who were pathologically diagnosed with IP or NP between 2005 and 2019 were retrospectively identified. Relative CT numbers were compared between the two patient groups. The factors with predictive power for differentiating IPs from NPs were identified by univariate and multivariate logistic regression analyses. RESULTS One hundred and twenty-two sinonasal masses were finally analysed (IP, 51 cases; NP, 71 cases). Relative CT numbers were significantly higher in IP than in NP (P < 0.001). Univariate logistic regression analysis showed relative CT number, bone erosion and bone thickening to have predictive value for differentiating IPs from NPs (relative CT number, P < 0.001; bone erosion, p = 0.04; bone thickening, P < 0.001). In the multivariate logistic regression analysis, relative CT number and bone thickening had predictive value for distinguishing IP from NP (relative CT number, p < 0.001; bone thickening, p = 0.02). The optimum cut off value calculation from the area under the receiver operating characteristics curve indicated that a relative CT number >1.3 was significantly associated with IP (sensitivity, 72.6%; specificity, 87.3%). Within cases not showing bone thickening, only the relative CT number was a predictive factor for differentiating IPs from NPs in the univariate analysis. CONCLUSIONS High relative CT numbers could potentially indicate IP, and their measurement could provide a basis for differentiating IPs from NPs.
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Affiliation(s)
- Nao Sano
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Shu Kikuta
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Kenji Kondo
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
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Tuerdi A, Kikuta S, Kinoshita M, Kamogashira T, Kondo K, Yamasoba T. Zone-specific damage of the olfactory epithelium under protein restriction. Sci Rep 2020; 10:22175. [PMID: 33335225 PMCID: PMC7746724 DOI: 10.1038/s41598-020-79249-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 12/03/2020] [Indexed: 12/11/2022] Open
Abstract
Oxidative stress causes tissue damage, affecting age-related pathologies. Protein restriction (PR) provides a powerful intervention strategy for reducing oxidative stress, which may have a positive effect on individual organs. However, it is unknown whether PR intervention influences the olfactory system. Here, we investigated how 10 months of PR could affect the cell dynamics of the olfactory epithelium (OE) in mice. We found that PR reduced age-related loss of outer hair cells in the cochlea, providing preventive effects against age-related hearing loss. In contrast, PR resulted in reduced mature olfactory sensory neurons (OSNs), increased proliferative basal cells, and increased apoptotic OSNs in zone 1 (the only area containing neurons expressing NQO1 [quinone dehydrogenase 1]) of the OE in comparison with animals given a control diet. Substantial oxidative stress occurred in NQO1-positive cells and induced apoptotic OSNs in zone 1. These results indicate that in contrast to the positive effect on the auditory system, PR induces oxidative stress and structurally and functionally negative effects on OSNs in zone 1, which is probably involved in the bioactivation of NQO1.
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Affiliation(s)
- Ayinuer Tuerdi
- Department of Otolaryngology and Head and Neck Surgery, The Second Xiangya Hospital, Central South University, 139 Renmin Road, Changsha, 410011, Hunan, China
| | - Shu Kikuta
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
| | - Makoto Kinoshita
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Teru Kamogashira
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Kenji Kondo
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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Kondo K, Kikuta S, Ueha R, Suzukawa K, Yamasoba T. Age-Related Olfactory Dysfunction: Epidemiology, Pathophysiology, and Clinical Management. Front Aging Neurosci 2020; 12:208. [PMID: 32733233 PMCID: PMC7358644 DOI: 10.3389/fnagi.2020.00208] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [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: 04/30/2020] [Accepted: 06/12/2020] [Indexed: 12/21/2022] Open
Abstract
Like other sensory systems, olfactory function deteriorates with age. Epidemiological studies have revealed that the incidence of olfactory dysfunction increases at the age of 60 and older and males are more affected than females. Moreover, smoking, heavy alcohol use, sinonasal diseases, and Down’s syndrome are associated with an increased incidence of olfactory dysfunction. Although the pathophysiology of olfactory dysfunction in humans remains largely unknown, studies in laboratory animals have demonstrated that both the peripheral and central olfactory nervous systems are affected by aging. Aged olfactory neuroepithelium in the nasal cavity shows the loss of mature olfactory neurons, replacement of olfactory neuroepithelium by respiratory epithelium, and a decrease in basal cell proliferation both in the normal state and after injury. In the central olfactory pathway, a decrease in the turnover of interneurons in the olfactory bulb (OB) and reduced activity in the olfactory cortex under olfactory stimulation is observed. Recently, the association between olfactory impairment and neurodegenerative diseases, such as Alzheimer’s disease (AD) and Parkinson’s disease (PD), has gained attention. Evidence-based pharmacotherapy to suppress or improve age-related olfactory dysfunction has not yet been established, but preliminary results suggest that olfactory training using odorants may be useful to improve some aspects of age-related olfactory impairment.
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Affiliation(s)
- Kenji Kondo
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shu Kikuta
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Rumi Ueha
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Keigo Suzukawa
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan
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Azuma S, Kikuta S, Yoshida M, Ando M, Kondo K, Yamasoba T. High CT attenuation values relative to the brainstem may predict squamous cell carcinoma arising from inverted papilloma. Acta Otolaryngol 2019; 139:1030-1037. [PMID: 31498015 DOI: 10.1080/00016489.2019.1659515] [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] [Indexed: 12/13/2022]
Abstract
Background: A diagnostic indicator for differentiating squamous cell carcinomas (SCCs) from inverted papillomas (IPs) has not been established. Objectives: This study aimed to evaluate whether CT attenuation values relative to those of the brainstem (relative CT number) could be useful in differentiating IPs from SCCs. Material and Methods: Consecutive patients who were pathologically diagnosed with IP or SCC between 2007 and 2017 were retrospectively identified. Relative CT numbers were compared between the two patient groups. The factors with predictive power for differentiating IPs from SCCs were identified by univariate and multivariate logistic regression analyses. Results: Fifty-four sinonasal tumour cases were finally analysed (IP, 25 cases; SCC, 29 cases). Relative CT numbers were significantly higher in SCC than in IP (p < .001). The univariate logistic regression analysis showed BMI, relative CT number, and disease duration to have predictive value for differentiating IPs from SCCs. In the multivariate logistic regression analysis, only the relative CT number had predictive value for distinguishing IP from SCC (odds ratio, 1.97), with a relative CT number of ≥1.4 being significantly associated with SCC. Conclusions: High relative CT numbers could potentially be used to identify SCCs, and their measurement could provide a basis for differentiating IPs from SCCs.
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Affiliation(s)
- Sanami Azuma
- Department of Otolaryngology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Shu Kikuta
- Department of Otolaryngology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Masafumi Yoshida
- Department of Otolaryngology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Mizuo Ando
- Department of Otolaryngology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Kenji Kondo
- Department of Otolaryngology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
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16
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Iwamura H, Kondo K, Kikuta S, Nishijima H, Kagoya R, Suzukawa K, Ando M, Fujimoto C, Toma-Hirano M, Yamasoba T. Caloric restriction reduces basal cell proliferation and results in the deterioration of neuroepithelial regeneration following olfactotoxic mucosal damage in mouse olfactory mucosa. Cell Tissue Res 2019; 378:175-193. [PMID: 31168693 DOI: 10.1007/s00441-019-03047-1] [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: 11/14/2018] [Accepted: 05/10/2019] [Indexed: 01/18/2023]
Abstract
The effects of caloric restriction (CR) on cell dynamics and gene expression in the mouse olfactory neuroepithelium are evaluated. Eight-week-old male C57BL/6 mice were fed either control pellets (104 kcal/week) or CR pellets (67 kcal/week). The cytoarchitecture of the olfactory neuroepithelium in the uninjured condition and its regeneration after injury by an olfactotoxic chemical, methimazole, were compared between mice fed with the control and CR diets. In the uninjured condition, there were significantly fewer olfactory marker protein (OMP)-positive olfactory receptor neurons and Ki67-positive proliferating basal cells at 3 months in the CR group than in the control group. The number of Ki67-positive basal cells increased after methimazole-induced mucosal injury in both the control and the CR groups, but the increase was less robust in the CR group. The recovery of the neuroepithelium at 2 months after methimazole administration was less complete in the CR group than in the control group. These histological changes were region-specific. The decrease in the OMP-positive neurons was prominent in the anterior region of the olfactory mucosa. Gene expression analysis using a DNA microarray and quantitative real-time polymerase chain reaction demonstrated that the expression levels of two inflammatory cytokines, interleukin-6 and chemokine ligand 1, were elevated in the olfactory mucosa of the CR group compared with the control group. These findings suggest that CR may be disadvantageous to the maintenance of the olfactory neuroepithelium, especially when it is injured.
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Affiliation(s)
- Hitoshi Iwamura
- Department of Otolaryngology-Head and Neck Surgery, The University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Kenji Kondo
- Department of Otolaryngology-Head and Neck Surgery, The University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
| | - Shu Kikuta
- Department of Otolaryngology-Head and Neck Surgery, The University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Hironobu Nishijima
- Department of Otolaryngology-Head and Neck Surgery, The University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Ryoji Kagoya
- Department of Otolaryngology-Head and Neck Surgery, The University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Keigo Suzukawa
- Department of Otolaryngology-Head and Neck Surgery, The University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Mizuo Ando
- Department of Otolaryngology-Head and Neck Surgery, The University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Chisato Fujimoto
- Department of Otolaryngology-Head and Neck Surgery, The University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Makiko Toma-Hirano
- Department of Otolaryngology-Head and Neck Surgery, The University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology-Head and Neck Surgery, The University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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Kikuta S, Furukawa Y, Hino K, Nakamura M, Kusukawa J. Huge ameloblastic carcinoma of the mandible with metastases treated in several different ways. Br J Oral Maxillofac Surg 2019; 57:182-184. [DOI: 10.1016/j.bjoms.2018.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 12/13/2018] [Indexed: 10/27/2022]
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Ueha R, Ueha S, Kondo K, Kikuta S, Yamasoba T. Cigarette Smoke-Induced Cell Death Causes Persistent Olfactory Dysfunction in Aged Mice. Front Aging Neurosci 2018; 10:183. [PMID: 29950987 PMCID: PMC6008309 DOI: 10.3389/fnagi.2018.00183] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Accepted: 05/30/2018] [Indexed: 11/21/2022] Open
Abstract
Introduction: Exposure to cigarette smoke is a cause of olfactory dysfunction. We previously reported that in young mice, cigarette smoke damaged olfactory progenitors and decreased mature olfactory receptor neurons (ORNs), then, mature ORNs gradually recovered after smoking cessation. However, in aged populations, the target cells in ORNs by cigarette smoke, the underlying molecular mechanisms by which cigarette smoke impairs the regenerative ORNs, and the degree of ORN regeneration after smoking cessation remain unclear. Objectives: To explore the effects of cigarette smoke on the ORN cell system using an aged mouse model of smoking, and to investigate the extent to which smoke-induced damage to ORNs recovers following cessation of exposure to cigarette smoke in aged mice. Methods: We intranasally administered a cigarette smoke solution (CSS) to 16-month-old male mice over 24 days, then examined ORN existence, cell survival, changes of inflammatory cytokines in the olfactory epithelium (OE), and olfaction using histological analyses, gene analyses and olfactory habituation/dishabituation tests. Results: CSS administration reduced the number of mature ORNs in the OE and induced olfactory dysfunction. These changes coincided with an increase in the number of apoptotic cells and Tumor necrosis factor (TNF) expression and a decrease in Il6 expression. Notably, the reduction in mature ORNs did not recover even on day 28 after cessation of treatment with CSS, resulting in persistent olfactory dysfunction. Conclusion: In aged mice, by increasing ORN death, CSS exposure could eventually overwhelm the regenerative capacity of the OE, resulting in continued reduction in the number of mature ORNs and olfactory dysfunction.
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Affiliation(s)
- Rumi Ueha
- Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Satoshi Ueha
- Division of Molecular Regulation of Inflammatory and Immune Diseases Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba, Japan
| | - Kenji Kondo
- Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shu Kikuta
- Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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Nakada T, Kikuta S, Mori H, Shimizu Y, Nishijima H, Kondo K, Yamasoba T. Low CT Attenuation Values of Sinonasal Benign Tumours Relative to the Brainstem Identify Schwannomas. ORL J Otorhinolaryngol Relat Spec 2018; 80:41-50. [DOI: 10.1159/000487240] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 01/28/2018] [Indexed: 11/19/2022]
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Ueha R, Shichino S, Ueha S, Kondo K, Kikuta S, Nishijima H, Matsushima K, Yamasoba T. Reduction of Proliferating Olfactory Cells and Low Expression of Extracellular Matrix Genes Are Hallmarks of the Aged Olfactory Mucosa. Front Aging Neurosci 2018; 10:86. [PMID: 29636678 PMCID: PMC5880952 DOI: 10.3389/fnagi.2018.00086] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [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: 01/22/2018] [Accepted: 03/13/2018] [Indexed: 11/13/2022] Open
Abstract
Background: The incidence of olfactory impairment increases with age; however, the detailed molecular and cellular mechanisms underlying this increase are yet to be determined. Methods: We examined the influence of aging on olfactory receptor neurons (ORNs), which are maintained by a unique stem cell system, from olfactory progenitor cells to mature ORNs, by histological comparisons of the physiological status of the olfactory epithelium between young adult and aged mice. Furthermore, we clarified the expression of genes encoding inflammatory cytokines, neurotrophins, growth factors, and extracellular matrix proteins to reveal the molecular mechanisms underlying olfactory impairment caused by aging. Results: The numbers of mature and immature ORNs, but not olfactory progenitors, decreased in the aged olfactory epithelium, with a concurrent reduction in Ki-67-positive proliferating cells. Transcriptome analyses revealed an increase in Il6, encoding a component of senescence-associated secretary phenotypes (SASP), and a decrease in Igf1, encoding a growth factor for ORNs, in the aged nasal mucosa. Interestingly, expression levels of several extracellular matrix genes, including Col1a2, decreased in the aged nasal mucosa. Consistent with the transcriptional changes, the number of Col1a2-GFP-positive cells decreased in the aged lamina propria. Conclusions: Our data suggest that reduction in ORN number and cell proliferation, reduced extracellular matrix gene expression, and increased SASP contribute to olfactory impairment during aging.
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Affiliation(s)
- Rumi Ueha
- Department of Otolaryngology, The University of Tokyo, Tokyo, Japan
| | - Shigeyuki Shichino
- Department of Molecular Preventive Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Satoshi Ueha
- Department of Molecular Preventive Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kenji Kondo
- Department of Otolaryngology, The University of Tokyo, Tokyo, Japan
| | - Shu Kikuta
- Department of Otolaryngology, The University of Tokyo, Tokyo, Japan
| | | | - Kouji Matsushima
- Department of Molecular Preventive Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology, The University of Tokyo, Tokyo, Japan
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Kondo K, Baba S, Suzuki S, Nishijima H, Kikuta S, Yamasoba T. Infraorbital Nerve Located Medially to Postoperative Maxillary Cysts: A Risk of Endonasal Surgery. ORL J Otorhinolaryngol Relat Spec 2018; 80:28-35. [DOI: 10.1159/000486372] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 12/17/2017] [Indexed: 11/19/2022]
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Nishijima H, Kondo K, Yamamoto T, Nomura T, Kikuta S, Shimizu Y, Mizushima Y, Yamasoba T. Influence of the location of nasal polyps on olfactory airflow and olfaction. Int Forum Allergy Rhinol 2018; 8:695-706. [PMID: 29394000 DOI: 10.1002/alr.22089] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 07/20/2017] [Revised: 12/12/2017] [Accepted: 01/04/2018] [Indexed: 11/07/2022]
Abstract
BACKGROUND Chronic rhinosinusitis with nasal polyps (CRSwNP) often results in decreased olfaction. In this study, we examined the relationship between nasal polyp location and olfactory airflow and odorant transport changes using virtual nasal polyp models at different locations and computational fluid dynamics (CFD) analysis. We also compared olfactory airflow and olfaction between patients with nasal polyps at different locations using CFD analysis and an olfactory test. METHODS Nasal computed tomography images were used to generate a normal model and 4 virtual nasal polyp models based on polyp locations, including the olfactory region (all-olfactory model), the region anterior to the olfactory region (preolfactory model), the middle meatus (middle-meatus model), and the superior meatus (superior-meatus model). Various airflow parameters were compared between these models and a normal model without polyps. We then performed a similar comparison between the 3-dimensional (3D) reconstruction models of patients with nasal polyps, and retrospectively investigated the correlation between olfaction and nasal polyp location in those patients. RESULTS Virtual nasal polyp analysis revealed dispersion of olfactory airflow in the all-olfactory model. Olfactory airflow and odorant transport showed maximum decrease in the preolfactory model and a slight decrease in the superior-meatus model. Olfactory airflow by polyps was further decreased by blockade of the olfactory airflow inlet than of the outlet. The findings obtained by patients corresponded well to those of the virtual polyp analysis. CONCLUSION Olfactory airflow and olfaction are differentially affected by nasal polyp location. This finding is important for planning polyp-removal surgeries from the perspective of improving patient olfaction.
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Affiliation(s)
| | - Kenji Kondo
- Department of Otolaryngology, The University of Tokyo, Tokyo, Japan
| | - Takahisa Yamamoto
- Department of Mechanical Engineering, National Institute of Technology, Gifu College, Gifu, Japan
| | - Tsutomu Nomura
- Department of Otolaryngology, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Shu Kikuta
- Department of Otolaryngology, The University of Tokyo, Tokyo, Japan
| | - Yuya Shimizu
- Department of Otolaryngology, The University of Tokyo, Tokyo, Japan
| | - Yu Mizushima
- Department of Otolaryngology, The University of Tokyo, Tokyo, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology, The University of Tokyo, Tokyo, Japan
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Horikiri K, Kikuta S, Kanaya K, Shimizu Y, Nishijima H, Yamasoba T, Kondo K. Intravenous olfactory test latency correlates with improvement in post-infectious olfactory dysfunction. Acta Otolaryngol 2017; 137:1083-1089. [PMID: 28503989 DOI: 10.1080/00016489.2017.1325005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
CONCLUSION This cohort study showed that onset latency in the intravenous olfactory test (IVO) may help predict when olfaction in patients with post-infectious olfactory dysfunction (PIOD) improves. OBJECTIVES To identify factors that predict the olfactory improvement period in patients with PIOD. METHODOLOGY/PRINCIPAL All consecutive patients presenting with PIOD in 1994-2014 who were followed up for 2 years were identified retrospectively. The ability of demographic/clinical factors (age, sex, body mass index, presence/absence of allergic rhinitis, treatment/non-treatment with herbal medicines, patient dependence on herbal medicine treatment, presence/absence of diabetes mellitus, and smoking status) and olfactory test factors (response/no response and onset latency and duration in the IVO test, and detection and recognition scores on the T&T olfactory test) to predict the olfactory improvement period (defined respectively as the time from PIOD onset or olfactory testing to the first self-report of olfaction improvement) was analyzed by univariate and multivariate regression. RESULTS Of the 187 PIOD patients, the prognostic ability of demographic/clinical factors was analyzed in 65. None predicted the olfactory improvement period. Of the 65 patients, 20 did not respond in the IVO test. In the remaining 45 patients, onset latency (but not the other olfactory test factors) was a significant prognosticator of olfactory improvement period (R2=0.24, p = 0.003).
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Affiliation(s)
- Kyohei Horikiri
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
- Department of Otolaryngology, Takeda General Hospital, Aizuwakamatsu-shi, Fukushima, Japan
| | - Shu Kikuta
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Kaori Kanaya
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Yuya Shimizu
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Hironobu Nishijima
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Kenji Kondo
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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Nishijima H, Kondo K, Toma-Hirano M, Kikuta S, Ando M, Ueha R, Yamasoba T. Prolonged denervation induces remodeling of nasal mucosa in rat model of posterior nasal neurectomy. Int Forum Allergy Rhinol 2017; 7:670-678. [DOI: 10.1002/alr.21952] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 03/23/2017] [Accepted: 04/16/2017] [Indexed: 12/18/2022]
Affiliation(s)
| | - Kenji Kondo
- Department of Otolaryngology; The University of Tokyo; Tokyo Japan
| | | | - Shu Kikuta
- Department of Otolaryngology; The University of Tokyo; Tokyo Japan
| | - Mizuo Ando
- Department of Otolaryngology; The University of Tokyo; Tokyo Japan
| | - Rumi Ueha
- Department of Otolaryngology; The University of Tokyo; Tokyo Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology; The University of Tokyo; Tokyo Japan
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Fujimaki Y, Tsunoda K, Kobayashi R, Tonghyo C, Tanaka F, Kuroda H, Numata T, Ishii T, Kuroda R, Masuda S, Hashimoto S, Misawa H, Shindo N, Mori T, Mori H, Uchiyama N, Kamei Y, Tanaka M, Hamaya H, Funatsuki S, Usui S, Ito I, Hamada K, Shindo A, Tokumaru Y, Morita Y, Ueha R, Nito T, Kikuta S, Sekimoto S, Kondo K, Sakamoto T, Itoh K, Yamasoba T, Matsumoto S. Independent exercise for glottal incompetence to improve vocal problems and prevent aspiration pneumonia in the elderly: a randomized controlled trial. Clin Rehabil 2016; 31:1049-1056. [PMID: 27742752 PMCID: PMC5524188 DOI: 10.1177/0269215516673208] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Objectives: To evaluate the effect of a self-controlled vocal exercise in elderly people with glottal closure insufficiency. Design: Parallel-arm, individual randomized controlled trial. Methods: Patients who visited one of 10 medical centers under the National Hospital Organization group in Japan for the first time, aged 60 years or older, complaining of aspiration or hoarseness, and endoscopically confirmed to have glottal closure insufficiency owing to vocal cord atrophy, were enrolled in this study. They were randomly assigned to an intervention or a control group. The patients of the intervention group were given guidance and a DVD about a self-controlled vocal exercise. The maximum phonation time which is a measure of glottal closure was evaluated, and the number of patients who developed pneumonia during the six months was compared between the two groups. Results: Of the 543 patients enrolled in this trial, 259 were allocated into the intervention group and 284 into the control; 60 of the intervention group and 75 of the control were not able to continue the trial. A total of 199 patients (age 73.9 ±7.25 years) in the intervention group and 209 (73.3 ±6.68 years) in the control completed the six-month trial. Intervention of the self-controlled vocal exercise extended the maximum phonation time significantly (p < 0.001). There were two hospitalizations for pneumonia in the intervention group and 18 in the control group, representing a significant difference (p < 0.001). Conclusion: The self-controlled vocal exercise allowed patients to achieve vocal cord adduction and improve glottal closure insufficiency, which reduced the rate of hospitalization for pneumonia significantly. ClinicalTrial.govIdentifier-UMIN000015567
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Affiliation(s)
- Yoko Fujimaki
- 1 Department of Artificial Organs and Medical Device Creation, National Institute of Sensory Organs, Tokyo, Japan.,2 Department of Otolaryngology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Koichi Tsunoda
- 1 Department of Artificial Organs and Medical Device Creation, National Institute of Sensory Organs, Tokyo, Japan
| | - Rika Kobayashi
- 1 Department of Artificial Organs and Medical Device Creation, National Institute of Sensory Organs, Tokyo, Japan
| | - Chong Tonghyo
- 3 Department of General Internal Medicine, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Fujinobu Tanaka
- 4 Department of Otolaryngology, National Hospital Organization Nagasaki Medical Center, Tokyo, Japan
| | - Hiroyuki Kuroda
- 5 Department of Otolaryngology, National Hospital Organization Kobe Medical Center, Tokyo, Japan
| | | | - Toyota Ishii
- 7 Department of Otolaryngology, Sagamihara National Hospital, Tokyo, Japan
| | - Reiko Kuroda
- 8 Department of Otolaryngology, Hirosaki National Hospital, Tokyo, Japan
| | - Sawako Masuda
- 9 Department of Otolaryngology, National Mie Hospital, Tokyo, Japan
| | - Sho Hashimoto
- 10 Department of Otolaryngology, National Sendai Medical Center, Tokyo, Japan
| | - Hayato Misawa
- 11 Department of Otolaryngology, National Hospital Organization Nagoya Medical Center, Tokyo, Japan
| | - Naoko Shindo
- 12 Department of Rehabilitation, National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Takahiro Mori
- 3 Department of General Internal Medicine, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Hiroko Mori
- 3 Department of General Internal Medicine, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Naoki Uchiyama
- 3 Department of General Internal Medicine, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Yuichirou Kamei
- 3 Department of General Internal Medicine, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Masashi Tanaka
- 3 Department of General Internal Medicine, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Hironobu Hamaya
- 3 Department of General Internal Medicine, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Shingo Funatsuki
- 3 Department of General Internal Medicine, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Satoko Usui
- 9 Department of Otolaryngology, National Mie Hospital, Tokyo, Japan
| | - Ikuno Ito
- 12 Department of Rehabilitation, National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Kohei Hamada
- 12 Department of Rehabilitation, National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Akihito Shindo
- 13 Department of Otolaryngology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Yutaka Tokumaru
- 13 Department of Otolaryngology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Yoko Morita
- 14 Department of Neurology National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Rumi Ueha
- 2 Department of Otolaryngology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Takaharu Nito
- 2 Department of Otolaryngology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Shu Kikuta
- 2 Department of Otolaryngology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Sotaro Sekimoto
- 1 Department of Artificial Organs and Medical Device Creation, National Institute of Sensory Organs, Tokyo, Japan
| | - Kenji Kondo
- 2 Department of Otolaryngology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Takashi Sakamoto
- 2 Department of Otolaryngology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Kenji Itoh
- 1 Department of Artificial Organs and Medical Device Creation, National Institute of Sensory Organs, Tokyo, Japan
| | - Tatsuya Yamasoba
- 2 Department of Otolaryngology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Sumio Matsumoto
- 1 Department of Artificial Organs and Medical Device Creation, National Institute of Sensory Organs, Tokyo, Japan
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Ueha R, Ueha S, Sakamoto T, Kanaya K, Suzukawa K, Nishijima H, Kikuta S, Kondo K, Matsushima K, Yamasoba T. Cigarette Smoke Delays Regeneration of the Olfactory Epithelium in Mice. Neurotox Res 2016; 30:213-24. [PMID: 27003941 DOI: 10.1007/s12640-016-9617-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 11/11/2015] [Revised: 03/07/2016] [Accepted: 03/15/2016] [Indexed: 01/19/2023]
Abstract
The olfactory system is a unique part of the mammalian nervous system due to its capacity for neurogenesis and the replacement of degenerating receptor neurons. Cigarette smoking is a major cause of olfactory dysfunction. However, the mechanisms by which cigarette smoke impairs the regenerative olfactory receptor neurons (ORNs) remain unclear. Here, we investigated the influence of cigarette smoke on ORN regeneration following methimazole-induced ORN injury. Administration of methimazole caused detachment of the olfactory epithelium from the basement membrane and induced olfactory dysfunction, thus enabling us to analyze the process of ORN regeneration. We found that intranasal administration of cigarette smoke solution (CSS) suppressed the recovery of ORNs and olfaction following ORN injury. Defective ORN recovery in CSS-treated mice was not associated with any change in the number of SOX2(+) ORN progenitor cells in the basal layer of the OE, but was associated with impaired recovery of GAP43(+) immature ORNs. In the nasal mucosa, mRNA expression levels of neurotrophic factors such as brain-derived neurotrophic factor, neurotrophin-3, neurotrophin-5, glial cell-derived neurotrophic factor, and insulin-like growth factor-1 (IGF-1) were increased following OE injury, whereas CSS administration decreased the ORN injury-induced IGF-1 expression. Administration of recombinant human IGF-1 prevented the CSS-induced suppression of ORN recovery following injury. These results suggest that CSS impairs regeneration of ORNs by suppressing the development of immature ORNs from ORN progenitors, at least partly by reducing IGF-1 in the nasal mucosa.
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Affiliation(s)
- Rumi Ueha
- Department of Otolaryngology, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo, 113-8655, Japan.
| | - Satoshi Ueha
- Department of Molecular Preventive Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Takashi Sakamoto
- Department of Otolaryngology, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Kaori Kanaya
- Department of Otolaryngology, Tokyo Metropolitan Bokutoh Hospital, 4-23-15 Kotobashi Sumida-ku, Tokyo, 130-8575, Japan
| | - Keigo Suzukawa
- Department of Otolaryngology, Tokyo Metropolitan Bokutoh Hospital, 4-23-15 Kotobashi Sumida-ku, Tokyo, 130-8575, Japan
| | - Hironobu Nishijima
- Department of Otolaryngology, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Shu Kikuta
- Department of Otolaryngology, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Kenji Kondo
- Department of Otolaryngology, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Kouji Matsushima
- Department of Molecular Preventive Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo, 113-8655, Japan
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Ueha R, Ueha S, Kondo K, Sakamoto T, Kikuta S, Kanaya K, Nishijima H, Matsushima K, Yamasoba T. Damage to Olfactory Progenitor Cells Is Involved in Cigarette Smoke-Induced Olfactory Dysfunction in Mice. Am J Pathol 2016; 186:579-86. [PMID: 26806086 DOI: 10.1016/j.ajpath.2015.11.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 10/01/2015] [Accepted: 11/02/2015] [Indexed: 11/30/2022]
Abstract
Exposure to cigarette smoke is a major cause of olfactory dysfunction. However, the underlying mechanisms by which cigarette smoke interferes with the highly regenerative olfactory nerve system remain unclear. To investigate whether cigarette smoke induces olfactory dysfunction by disrupting cell proliferation and cell survival in the olfactory epithelium (OE), we developed a mouse model of smoking that involved intranasal administration of a cigarette smoke solution (CSS). Immunohistological analyses and behavioral testing showed that CSS administration during a period of 24 days reduced the number of olfactory marker protein-positive mature olfactory receptor neurons (ORNs) in the OE and induced olfactory dysfunction. These changes coincided with a reduction in the number of SOX2(+) ORN progenitors and Ki-67(+) proliferating cells in the basal layer of the OE, an increase in the number of caspase-3(+) apoptotic cells, and an increase in the expression of mRNA for the inflammatory cytokines IL-1β and IL-6. Notably, the proliferating ORN progenitor population recovered after cessation of treatment with CSS, resulting in the subsequent restoration of mature ORN numbers and olfaction. These results suggest that SOX2(+) ORN progenitors are targets of CSS-induced impairment of the OE, and that by damaging the ORN progenitor population and increasing ORN death, CSS exposure eventually overwhelms the regenerative capacity of the epithelium, resulting in reduced numbers of mature ORNs and olfactory dysfunction.
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Affiliation(s)
- Rumi Ueha
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
| | - Satoshi Ueha
- Department of Molecular Preventive Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kenji Kondo
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Takashi Sakamoto
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shu Kikuta
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kaori Kanaya
- Department of Otolaryngology, Tokyo Teishin Hospital, Tokyo, Japan
| | - Hironobu Nishijima
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kouji Matsushima
- Department of Molecular Preventive Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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Miki R, Kikuta S, Koga T, Kai S, Inoue A, Kawase T, Ishihara S, Nakayama S. Incidence of venous thromboembolism in japanese trauma population. Intensive Care Med Exp 2015. [PMCID: PMC4796885 DOI: 10.1186/2197-425x-3-s1-a378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Shinya Y, Miyawaki S, Nakatomi H, Okano A, Imai H, Shin M, Sato K, Tsuchida T, Hayashi T, Terao Y, Numakura S, Morikawa T, Shibahara J, Kikuta S, Kondo K, Tatsuno K, Mori H, Kunimatsu A, Tsuji S, Saito N. Recurrent cerebral aneurysm formation and rupture within a short period due to invasive aspergillosis of the nasal sinus; pathological analysis of the catastrophic clinical course. Int J Clin Exp Pathol 2015; 8:13510-13522. [PMID: 26722566 PMCID: PMC4680511] [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] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 09/28/2015] [Indexed: 06/05/2023]
Abstract
Destructive infiltration of invasive fungal sinusitis can easily occur into the central nervous system (CNS). Cerebral aneurysms associated with fungal infection are highly vulnerable to rupture, and can frequently and rapidly take a serious clinical course. We experienced a patient who twice developed cerebral aneurysm followed by rupture due to invasive fugal sinusitis. This 77-year-old man was admitted for progressive bilateral visual disturbance, which was initially treated as idiopathic hypertrophic pachymeningitis. The patient subsequently suffered subarachnoid hemorrhage (SAH) twice in only 12 days. Both SAH originated from different newly formed cerebral aneurysms. Trapping was performed for both ruptured aneurysms. Pathological examination of the resected aneurysms indicated the presence of fungi determined to be Aspergillus. This Aspergillus infection was also discovered inside the frontal sinus by endoscopic biopsy, so a regimen of antifungal agents was instituted. Prolonged antifungal therapy caused renal impairment, which ultimately led to the patient's death. Autopsy detected no mycotic infiltration of the major cerebral arteries, except for the 2 ruptured cerebral aneurysms. However, prolonged mycosis of the CNS, such as in the deep part in the falx cerebri and in the small veins proximal to the tentorium cerebelli, was observed, indicating that mycosis invading the cranium is refractory even to long-term administration of antifungal agents. The present case strongly suggests that urgent and proactive definitive diagnosis is essential to successfully treat invasive paranasal sinus aspergillosis. If infiltration of the CNS is suspected, early surgical resection and antifungal therapy must be initiated immediately.
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Affiliation(s)
- Yuki Shinya
- Department of Neurosurgery, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Satoru Miyawaki
- Department of Neurosurgery, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Hirofumi Nakatomi
- Department of Neurosurgery, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Atsushi Okano
- Department of Neurosurgery, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Hideaki Imai
- Department of Neurosurgery, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Masahiro Shin
- Department of Neurosurgery, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Kazuya Sato
- Department of Neurology, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Takeyuki Tsuchida
- Department of Neurology, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Toshihiro Hayashi
- Department of Neurology, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Yasuo Terao
- Department of Neurology, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Satoe Numakura
- Department of Pathology, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Teppei Morikawa
- Department of Pathology, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Junji Shibahara
- Department of Pathology, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Shu Kikuta
- Department of Otolaryngology, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Kenji Kondo
- Department of Otolaryngology, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Keita Tatsuno
- Department of Infectious Diseases, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Harushi Mori
- Department of Radiology, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Akira Kunimatsu
- Department of Radiology, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Shoji Tsuji
- Department of Neurology, Faculty of Medicine, The University of TokyoTokyo, Japan
| | - Nobuhito Saito
- Department of Neurosurgery, Faculty of Medicine, The University of TokyoTokyo, Japan
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Sakamoto T, Kikuta S, Kikkawa YS, Tsutsumiuchi K, Kanaya K, Fujimaki Y, Ueha R, Saito Y, Yamasoba T. Differences in Postoperative Hearing Outcomes and Vertigo in Patients with Otosclerosis Treated with Laser-Assisted Stapedotomy versus Stapedectomy. ORL J Otorhinolaryngol Relat Spec 2015; 77:287-93. [DOI: 10.1159/000439177] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 08/03/2015] [Indexed: 11/19/2022]
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Kikuta S, Miki R, Ishihara S, Nakayama S. Protective effect of a fecal incontinence management system against bacteremia for out-of-hospital cardiac arrest patients undergoing extracorporeal membrane oxygenation. Crit Care 2015. [PMCID: PMC4472675 DOI: 10.1186/cc14182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Yoshihara S, Kondo K, Kanaya K, Suzukawa K, Baba S, Toma-Hirano M, Kikuta S, Iwasaki Y, Fujio K, Yamasoba T. Tumour necrosis factor inhibitor-associated sinusitis. Rhinology 2014; 52:246-51. [PMID: 25271530 DOI: 10.4193/rhino13.074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
AIM To describe the features of chronic sinusitis associated with the use of tumour necrosis factor (TNF) inhibitors. METHODOLOGY A retrospective review of the medical records between 2003 and 2011 revealed that five patients had developed chronic sinusitis after the start of TNF inhibitor administration and required rhinological evaluation and treatment. RESULTS The incidence of refractory sinusitis associated with TNF inhibitors was approximately 2%. Of the five patients identified, four patients were medicated with etanercept and one with infliximab. The maxillary sinus was most commonly involved and cultures of the sinus discharge revealed Pseudomonas aeruginosa in three cases. Two patients showed improvement of sinusitis with antibiotic medication, despite the continuous use of TNF inhibitor, while in two other patients, sinusitis was resistant to antibiotic medication. Another patient who had developed recurrence of sinusitis after complete remission of previous chronic sinusitis by endoscopic sinus surgery showed remission only after cessation of TNF inhibitor. CONCLUSION Chronic sinusitis associated with TNF inhibitors is considered to be a new disease entity, and it will become more common due to the increasing use of TNF inhibitors.
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Kanaya K, Kondo K, Suzukawa K, Sakamoto T, Kikuta S, Okada K, Yamasoba T. Innate immune responses and neuroepithelial degeneration and regeneration in the mouse olfactory mucosa induced by intranasal administration of Poly(I:C). Cell Tissue Res 2014; 357:279-99. [PMID: 24744264 PMCID: PMC4077259 DOI: 10.1007/s00441-014-1848-2] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Accepted: 02/11/2014] [Indexed: 01/12/2023]
Abstract
The pathogenesis of postviral olfactory disorder (PVOD) has not been fully elucidated. We investigated morphological changes and innate immune responses in the mouse olfactory mucosa induced by intranasal administration of polyinosinic-polycytidylic acid [Poly(I:C)], a synthetic analog of viral double-stranded RNA. Mice received three administrations of saline with or without Poly(I:C), once every 24 h. The olfactory mucosa was harvested at various intervals after the first administration (8 h, 3, 9 and 24 days). In the Poly(I:C) group, the number of apoptotic cells in the olfactory neuroepithelium had increased at 8 h. At 9 days, the olfactory neuroepithelium had severely degenerated and behavioral tests demonstrated that the mice showed signs of olfactory deterioration. At 24 days, the structure of the neuroepithelium had regenerated almost completely. Regarding the innate immune responses, many neutrophils had infiltrated the olfactory neuroepithelium at 8 h and had exuded into the nasal cavity by 3 days. Macrophages had also infiltrated the olfactory neuroepithelium at 8 h although to a lesser extent, but they still remained in the neuroepithelium at 24 days. Poly(I:C)-induced neuroepithelial damage was significantly inhibited by a neutrophil elastase inhibitor and was suppressed in neutropenic model mice. These findings suggest that the secondary damage caused by the neutrophil-mediated innate immune response plays an important role in the pathogenesis of PVOD.
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Affiliation(s)
- Kaori Kanaya
- Department of Otolaryngology-Head and Neck Surgery, The University of Tokyo Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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Yoshihara S, Kondo K, Kanaya K, Suzukawa K, Baba S, Toma-Hirano M, Kikuta S, Iwasaki Y, Fujio K, Yamasoba T. Tumour necrosis factor inhibitor-associated sinusitis. Rhinology 2014. [DOI: 10.4193/rhin13.074] [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: 11/08/2022]
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Kikuta S, Fletcher ML, Homma R, Yamasoba T, Nagayama S. Odorant response properties of individual neurons in an olfactory glomerular module. Neuron 2013; 77:1122-35. [PMID: 23522047 DOI: 10.1016/j.neuron.2013.01.022] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/16/2013] [Indexed: 11/26/2022]
Abstract
Neuronal networks that are directly associated with glomeruli in the olfactory bulb are thought to comprise functional modules. However, this has not yet been experimentally proven. In this study, we explored the anatomical and functional architecture of glomerular modules using in vivo two-photon calcium imaging. Surprisingly, the deep portions of the glomerular modules showed considerable spatial overlap with other modules. Juxtaglomerular cells showed similar excitatory odorant response profiles to presynaptic olfactory sensory neuron inputs. Mitral cells exhibited a more sharply tuned molecular receptive range compared to juxtaglomerular cells, and their odorant response profiles varied depending on their interneuronal horizontal distances. These data suggest that glomerular modules are composed of functionally distinct neurons, and that homogenous odor inputs to each glomerulus may be parsed and processed in different fashions within the modules before being sent to higher olfactory centers.
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Affiliation(s)
- Shu Kikuta
- Department of Neurobiology and Anatomy, University of Texas Medical School at Houston, Houston, TX 77030, USA
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Kikuta S, Sato K, Kashiwadani H, Yamasoba T, Mori K. Anterior olfactory nucleus pars externa neurons detect the difference in the concentration between ipsi-nostril and contra-nostril inputs. Neurosci Res 2010. [DOI: 10.1016/j.neures.2010.07.1705] [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: 11/25/2022]
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Sato K, Kikuta S, Kashiwadani H, Yamasoba T, Mori K. Spatial representation of odorant categories for the odor-source localization in the anterior olfactory nucleus pars externa. Neurosci Res 2010. [DOI: 10.1016/j.neures.2010.07.1706] [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: 11/17/2022]
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Kashiwadani H, Kikuta S, Mori K. Two types of olfactory cortex neurons with different signal processing mode during slow wave state. Neurosci Res 2009. [DOI: 10.1016/j.neures.2009.09.1160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kikuta S, Asakage T, Nakao K, Sugasawa M, Kubota A. The aggravating factors of hyperammonemia related to 5-fluorouracil infusion—A report of two cases. Auris Nasus Larynx 2008; 35:295-9. [PMID: 17826933 DOI: 10.1016/j.anl.2007.04.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2006] [Revised: 03/09/2007] [Accepted: 04/22/2007] [Indexed: 11/23/2022]
Abstract
Hyperammonemia or hyperammonemic leukoencephalopathy sometimes occurs as an adverse event after 5-fluorouracil (5-FU) chemotherapy. The actual mechanism responsible for hyperammonemia by 5-FU administration is not known. Patient 1, a 48-year-old woman with cervical esophageal squamous cell carcinoma (SCC) presented with transient hyperammonemic leukoencephalopathy after undergoing combined chemotherapy (750mg/body/day of 5-FU for 5 days+100mg/body/day of cisplatin). Patient 2, a 58-year-old man with oropharyngeal and lower esophageal SCCs presented with hyperammonemia without leukoencephalopathy while undergoing combined chemotherapy (1200mg/body/day of 5-FU for 5 days+120mg/body/day of cisplatin). The neural symptoms of both patients improved after the termination of 5-FU administration and the early administration of fluid replacement. Ammonia can accumulate in the body when catabolism is insufficient because of an impairment in the urea cycle. The excess production of ammonium from 5-FU catabolites in addition to aggravating factors, e.g., renal dysfunction, constipation and body weight loss, may explain the transient hyperammonemia seen in the present two cases. The incidence of hyperammonemia by 5-FU administration will be one of the adverse events to need care in future and may be decreased by being aware of the presence of renal dysfunction, taking measures to prevent constipation, and nutritional management.
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Affiliation(s)
- Shu Kikuta
- Department of Otolaryngology, Faculty of Medicine, University of Tokyo,7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
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Kikuta S, Ushio M, Fujimaki Y, Kaga K. Factors associated with the presence of drug-resistant bacteria and recurrent acute otitis media in children--a study in a private clinic. Acta Otolaryngol 2007:5-8. [PMID: 18340553 DOI: 10.1080/03655230701595220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
CONCLUSIONS The proportion of drug-resistant bacteria was lower than previous reports. In children with acute otitis media (AOM), lower age, presence of multiple bacteria, and otitis media with effusion (OME) represented significant factors for recurrent AOM and the presence of drug-resistant bacteria. OBJECTIVE Recently, the proportion of drug-resistant bacteria has been increasing in children with AOM. We studied the proportion of drug-resistant bacteria and background factors for detection of drug-resistant bacteria and recurrent AOM in a private clinic. SUBJECTS AND METHODS Subjects comprised 170 patients <12 years old with AOM. Middle ear fluid was collected and pathogenic bacteria were identified. The following factors were considered: age, sex, use of antibiotics in the past 1 month, past history of recurrent AOM, presence of OME, and multiple bacteria of the three main strains (Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis). RESULTS A total of 169 strains were detected in 77% of children with AOM. Drug-resistant bacteria comprised 44 of the 169 strains (26%). Lower age (p=0.001) and presence of multiple bacteria (p<0.001) represented significant factors for the presence of drug-resistant bacteria. OME was a significant factor for recurrent AOM (p<0.001).
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Kikuta S, Kashiwadani H, kaga K, Mori K. Close co-ordination of binasal inputs in the rat anterior olfactory nucleus. Neurosci Res 2007. [DOI: 10.1016/j.neures.2007.06.1158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Mitsui T, Zhang X, Kitao S, Kobayashi Y, Seto M, Kikuta S. Self-interference effect of nuclear forward scattering in an antiferromagnet 57FeBO 3single crystal which is excited with magneto elastic vibration of 27.56 nHz. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302091663] [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: 11/10/2022] Open
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Yoda Y, Zhang XW, Seto M, Kitao S, Kikuta S. High-resolution monochromator for nuclear resonant scattering by 151Eu and 149Sm. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302091675] [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: 11/10/2022] Open
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Kikuta S, Imai Y, Iizuka T, Yoda Y, Zhang XW, Hirano K. X-ray diffraction with a Bragg angle near pi/2 and its applications. J Synchrotron Radiat 1998; 5:670-672. [PMID: 15263614 DOI: 10.1107/s0909049597018621] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/1997] [Accepted: 12/02/1997] [Indexed: 05/24/2023]
Abstract
X-ray dynamical diffraction phenomena at a Bragg angle near pi/2 are studied. The X-ray transmissivity as well as the reflectivity from the (991) lattice plane of a silicon thin plate is observed. It agrees fairly well with the diffraction pattern calculated on the basis of the Darwin approach. The possibility is discussed whether a set of two crystal plates arranged face to face, in which the diffraction condition with a Bragg angle near pi/2 is satisfied, may be used as a very high resolution monochromator.
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Affiliation(s)
- S Kikuta
- Department of Applied Physics, School of Engineering, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan
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Yoda Y, Suzuki T, Zhang XW, Hirano K, Kikuta S. X-ray parametric scattering by a diamond crystal. J Synchrotron Radiat 1998; 5:980-982. [PMID: 15263718 DOI: 10.1107/s0909049597020232] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/1997] [Accepted: 12/23/1997] [Indexed: 05/24/2023]
Abstract
Spontaneous X-ray parametric scattering from a diamond single crystal has been observed at the Photon Factory. The high perfection of the diamond single crystal and the small angular divergence of synchrotron radiation has enabled down-converted X-ray photon pairs to scatter into two small solid angles which satisfy the phase-matching condition. High-efficiency noise reduction was performed using avalanche photodiode detectors with good time resolution.
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Affiliation(s)
- Y Yoda
- Department of Applied Physics, School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
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Zhao JY, Zhang XW, Ando M, Yoda Y, Kikuta S, Takei H. X-ray characterization of alpha-Fe(2)O(3) single crystals containing 2.2% and 95% (57)Fe. J Synchrotron Radiat 1998; 5:952-954. [PMID: 15263708 DOI: 10.1107/s0909049597016026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/1997] [Accepted: 11/10/1997] [Indexed: 05/24/2023]
Abstract
alpha-Fe(2)O(3) single crystals containing 2.2% and 95% (57)Fe isotopes were characterized by means of X-ray topography, the diffraction rocking curve and the integrated intensity. These crystals were revealed to be nearly perfect and suitable for a further nuclear-resonant Bragg-scattering study.
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Affiliation(s)
- J Y Zhao
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Oho 1-1, Tsukuba, Ibaraki 305, Japan
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Kunimune Y, Yoda Y, Izumi K, Yabashi M, Zhang XW, Harami T, Ando M, Kikuta S. Two-photon correlations in X-rays from a synchrotron radiation source. J Synchrotron Radiat 1997; 4:199-203. [PMID: 16699230 DOI: 10.1107/s0909049597006912] [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] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The intensity correlation experiment using visible light performed by Hanbury Brown & Twiss [Nature (London) (1956), 177, 27-29] is extended to X-ray wavelengths. Correlations of 14.4 keV X-ray photons from a synchrotron radiation source are observed by the coincidence counting technique. The high brilliance of synchrotron radiation available in the Tristan main ring enables the observation of two-photon correlations with a reasonable measurement time.
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Seto M, Yoda Y, Kikuta S, Zhang XW, Ando M. Temperature dependence of phonon energy spectra with nuclear resonant scattering of synchrotron radiation. ACTA ACUST UNITED AC 1996. [DOI: 10.1007/bf02458922] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Hasegawa Y, Yoda Y, Izumi K, Ishikawa T, Kikuta S, Zhang XW, Ando M. Phase transfer in time-delayed interferometry with nuclear resonant scattering. Phys Rev Lett 1995; 75:2216-2219. [PMID: 10059243 DOI: 10.1103/physrevlett.75.2216] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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