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Matsunaga M, Sato Y, Nagao M, Ikeda M, Motomura C, Kameda M, Yoshida Y, Terada A, Miyairi I, Fujisawa T. Development and validation of a new asthma questionnaire to help achieve a high level of control in school-age children and adolescents. Allergol Int 2024; 73:224-230. [PMID: 38065704 DOI: 10.1016/j.alit.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/17/2023] [Accepted: 11/01/2023] [Indexed: 04/02/2024] Open
Abstract
BACKGROUND Maintaining good asthma control minimizes the risk of exacerbations and lung function decline and is a primary goal of asthma management. The Japanese Pediatric Asthma Guidelines (JPGL) employs different classification criteria for control status from other guidelines, stressing a higher level of control. Based on JPGL, we previously developed a caregiver-completed questionnaire for assessing and achieving best asthma control in preschoolers. In this study, we aimed to develop a questionnaire for school-age children and adolescents. METHODS A working questionnaire comprising 14 items for patients and 34 items for caregivers was administered to 362 asthma patients aged 6-15 years and their caregivers. Separately, physicians filled out a questionnaire to determine JPGL-defined control. Logistic regression analysis was performed to construct a model to predict control levels using data from a randomly selected set of completed questionnaires from two-thirds of the subjects. Validation was performed using the remaining questionnaires. RESULTS A set of 7 questions, encompassing self-assessed control status at the time of the visit and in the past month, and nocturnal/early morning asthma symptoms for patients and frequency of asthma symptoms, dyspnea, rescue beta-agonist use, and asthma hospitalization for caregivers, were selected and the 7-item model showed a good statistical fit with AIC of 110.5. The model has been named the Best Asthma Control Test for School Children and Adolescents (Best ACT-S). Best ACT-S scores differed significantly in the hypothetical direction among the groups of different JPGL-defined control levels, step-up/down treatment decisions, and presence/non-presence of exacerbations in the previous year. CONCLUSIONS The Best ACT-S is a valid questionnaire for children/adolescents aiming for best asthma control.
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Affiliation(s)
- Mayumi Matsunaga
- Allergy Center, National Hospital Organization Mie National Hospital, Mie, Japan; Department of Pediatrics, Hamamatsu University Graduate School of Medicine, Hamamatsu, Japan
| | - Yasunori Sato
- Department of Preventive Medicine and Public Health, Keio University School of Medicine, Tokyo, Japan
| | - Mizuho Nagao
- Allergy Center, National Hospital Organization Mie National Hospital, Mie, Japan
| | - Masanori Ikeda
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Chikako Motomura
- Department of Pediatrics, National Hospital Organization Fukuoka National Hospital, Fukuoka, Japan
| | - Makoto Kameda
- Department of Pediatrics, Osaka Habikino Medical Center, Osaka, Japan
| | - Yukinori Yoshida
- Department of Pediatrics, Osaka Habikino Medical Center, Osaka, Japan
| | | | - Isao Miyairi
- Department of Pediatrics, Hamamatsu University Graduate School of Medicine, Hamamatsu, Japan
| | - Takao Fujisawa
- Allergy Center, National Hospital Organization Mie National Hospital, Mie, Japan.
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Hayashi R, Srisomboon Y, Iijima K, Maniak PJ, Tei R, Kobayashi T, Matsunaga M, Luo H, Masuda MY, O'Grady SM, Kita H. Cholinergic sensing of allergen exposure by airway epithelium promotes type 2 immunity in the lungs. J Allergy Clin Immunol 2024; 153:793-808.e2. [PMID: 38000698 PMCID: PMC10939907 DOI: 10.1016/j.jaci.2023.10.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 09/26/2023] [Accepted: 10/09/2023] [Indexed: 11/26/2023]
Abstract
BACKGROUND Nonneuronal cells, including epithelial cells, can produce acetylcholine (ACh). Muscarinic ACh receptor antagonists are used clinically to treat asthma and other medical conditions; however, knowledge regarding the roles of ACh in type 2 immunity is limited. OBJECTIVE Our aim was to investigate the roles of epithelial ACh in allergic immune responses. METHODS Human bronchial epithelial (HBE) cells were cultured with allergen extracts, and their ACh production and IL-33 secretion were studied in vitro. To investigate immune responses in vivo, naive BALB/c mice were treated intranasally with different muscarinic ACh receptor antagonists and then exposed intranasally to allergens. RESULTS At steady state, HBE cells expressed cellular components necessary for ACh production, including choline acetyltransferase and organic cation transporters. Exposure to allergens caused HBE cells to rapidly release ACh into the extracellular medium. Pharmacologic or small-interfering RNA-based blocking of ACh production or autocrine action through the M3 muscarinic ACh receptors in HBE cells suppressed allergen-induced ATP release, calcium mobilization, and extracellular secretion of IL-33. When naive mice were exposed to allergens, ACh was quickly released into the airway lumen. A series of clinical M3 muscarinic ACh receptor antagonists inhibited allergen-induced IL-33 secretion and innate type 2 immune response in the mouse airways. In a preclinical murine model of asthma, an ACh receptor antagonist suppressed allergen-induced airway inflammation and airway hyperreactivity. CONCLUSIONS ACh is released quickly by airway epithelial cells on allergen exposure, and it plays an important role in type 2 immunity. The epithelial ACh system can be considered a therapeutic target in allergic airway diseases.
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Affiliation(s)
- Ryusuke Hayashi
- Division of Allergy, Asthma and Clinical Immunology, Mayo Clinic, Scottsdale, Ariz; Department of Medicine, Mayo Clinic, Scottsdale, Ariz
| | - Yotesawee Srisomboon
- Department of Animal Science, University of Minnesota, St Paul, Minn; Department of Integrative Biology and Physiology, University of Minnesota, St Paul, Minn
| | - Koji Iijima
- Division of Allergy, Asthma and Clinical Immunology, Mayo Clinic, Scottsdale, Ariz; Department of Medicine, Mayo Clinic, Scottsdale, Ariz
| | - Peter J Maniak
- Department of Animal Science, University of Minnesota, St Paul, Minn; Department of Integrative Biology and Physiology, University of Minnesota, St Paul, Minn
| | - Rinna Tei
- Division of Allergy, Asthma and Clinical Immunology, Mayo Clinic, Scottsdale, Ariz; Department of Medicine, Mayo Clinic, Scottsdale, Ariz
| | - Takao Kobayashi
- Division of Allergy, Asthma and Clinical Immunology, Mayo Clinic, Scottsdale, Ariz; Department of Medicine, Mayo Clinic, Scottsdale, Ariz
| | - Mayumi Matsunaga
- Division of Allergy, Asthma and Clinical Immunology, Mayo Clinic, Scottsdale, Ariz; Department of Medicine, Mayo Clinic, Scottsdale, Ariz
| | - Huijun Luo
- Division of Allergy, Asthma and Clinical Immunology, Mayo Clinic, Scottsdale, Ariz; Department of Medicine, Mayo Clinic, Scottsdale, Ariz
| | - Mia Y Masuda
- Mayo Clinic Graduate School of Biomedical Sciences, Rochester, Minn; Mayo Clinic Graduate School of Biomedical Sciences, Scottsdale, Ariz
| | - Scott M O'Grady
- Department of Animal Science, University of Minnesota, St Paul, Minn; Department of Integrative Biology and Physiology, University of Minnesota, St Paul, Minn
| | - Hirohito Kita
- Division of Allergy, Asthma and Clinical Immunology, Mayo Clinic, Scottsdale, Ariz; Department of Medicine, Mayo Clinic, Scottsdale, Ariz; Department of Immunology, Mayo Clinic Rochester, Rochester, Minn; Department of Immunology, Mayo Clinic Arizona, Scottsdale, Ariz.
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Kimura R, Matsunaga M, Barroga E, Hayashi N. Asynchronous e-learning with technology-enabled and enhanced training for continuing education of nurses: a scoping review. BMC Med Educ 2023; 23:505. [PMID: 37442970 DOI: 10.1186/s12909-023-04477-w] [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] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023]
Abstract
BACKGROUND Asynchronous e-learning has become the mainstream choice since the transformation of learning formats by the coronavirus disease-19 pandemic. This scoping review aimed to examine the technologies used in asynchronous e-learning for the continuing education of clinical nurses and their modes of delivery and effectiveness. METHODS This scoping review covered the period between 2011 and 2023. Six databases were searched for relevant studies following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis extension for Scoping Reviews (PRISMA-ScR) protocol. RESULTS Sixty articles met the inclusion criteria. There was a noticeable trend toward using diverse technology-enabled and enhanced training (TEET) options after 2017. The enabling technological approaches, such as interactive online modules (25 articles) and video modules (25 articles), are described in the articles. The most commonly used enhancing technologies were scenario-based learning (nine articles), resource access (eight articles), computer simulation or virtual reality (three articles), and gamification (three articles). Among the outcomes, knowledge acquisition was the most commonly examined outcome (41 articles). CONCLUSIONS Notably, many interactive TEET modules were used in asynchronous e-learning. There were few studies on gamification, computer simulation or virtual reality, and scenario-based learning (techniques to enhance intrinsic motivation further). However, the adoption of asynchronous e-learning with advanced TEET options is anticipated to increase in the future. Therefore, objective outcome measures are required to determine the effects of such learning methods on knowledge acquisition and behavioral changes.
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Affiliation(s)
- Rika Kimura
- Department of Adult Health Nursing, Graduate School of Nursing Science, St. Luke's International University, 10-1 Akashi-Cho, Chuo-Ku, Tokyo, 104-0044, Japan.
| | - Mayumi Matsunaga
- Department of Nursing, Faculty of Human Sciences, Sophia University, Tokyo, Japan
| | - Edward Barroga
- Department of Medical Education, Showa University School of Medicine, Tokyo, Japan
| | - Naoko Hayashi
- Graduate School of Nursing Science, St. Luke's International University, Tokyo, Japan
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Hayashi R, Iijima K, Kobayashi T, Matsunaga M, Tei R, Kita H. The Network of Epithelial Cells and ILC2s Involving Acetylcholine and Muscarinic Receptors Promote Type 2 Immune Responses to Inhaled Allergen. J Allergy Clin Immunol 2023. [DOI: 10.1016/j.jaci.2022.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Matsunaga M, Lama J, Hayashi R, Kobayashi T, Iijima K, Kita H. Sensitization Through Skin and Airways Mediates Distinct Mechanisms for Anaphylaxis in Mice. J Allergy Clin Immunol 2023. [DOI: 10.1016/j.jaci.2022.12.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Nogami K, Nagao M, Takase T, Yasuda Y, Yamada S, Matsunaga M, Hoshi M, Hamada K, Kuwabara Y, Tsugawa T, Fujisawa T. House Dust Mite Subcutaneous Immunotherapy and Lung Function Trajectory in Children and Adolescents with Asthma. Children (Basel) 2022; 9:children9040487. [PMID: 35455531 PMCID: PMC9028398 DOI: 10.3390/children9040487] [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] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/24/2022] [Accepted: 03/28/2022] [Indexed: 11/27/2022]
Abstract
Background: Allergen-specific immunotherapy is currently the only disease-modifying treatment for allergic asthma, and it has been shown to improve control of asthma while reducing both drug use and asthma exacerbations. However, its effects on lung function—especially its long-term effects—remain controversial. We aimed to identify factors associated with a possible beneficial effect of allergen-specific immunotherapy on lung function in asthma by retrospectively evaluating the long-term changes in lung function in children with asthma who received house dust mite subcutaneous immunotherapy (HDM-SCIT). Methods: We enrolled children with asthma who had undergone HDM-SCIT for more than 1 year. Clinical information and lung function measurements were retrieved from the electronic chart system. To characterize the trajectory of lung function change, we performed linear regression analysis to evaluate the maximal expiratory flow at 50% of the forced vital capacity during two periods: before and during HDM-SCIT. Slopes from a least-squares regression line for the two periods, i.e., S1 before HDM-SCIT and S2 during HDM-SCIT, were compared. The subjects were then classified into two groups: an improving group (Group I) defined as S2 − S1 > 0, and a declining group (Group D) defined as S2 − S1 < 0. The clinical factors at the start of HDM-SCIT were compared between the two groups. Results: A total of 16 patients were analyzed. Eight patients were classified into each of Group I and Group D. The mean ages were 10.5 and 11.8 years, and the mean treatment periods were 4.1 and 3.9 years. Group I had a significantly lower blood eosinophil count and a significantly higher HDM-specific IgE level than Group D. Logistic regression showed a strong relationship between those two markers and the lung function trajectory. Conclusion: Control of the blood eosinophil count in highly HDM-sensitized patients may increase the beneficial effect of HDM-SCIT on lung function.
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Affiliation(s)
- Kazutaka Nogami
- Department of Pediatrics, Sapporo Medical University School of Medicine, Sapporo-shi 060-8543, Japan; (K.N.); (T.T.)
- Allergy Center and Department of Clinical Research, Mie National Hospital, Tsu 514-0125, Japan; (M.N.); (T.T.); (Y.Y.); (S.Y.); (M.M.); (M.H.); (K.H.); (Y.K.)
| | - Mizuho Nagao
- Allergy Center and Department of Clinical Research, Mie National Hospital, Tsu 514-0125, Japan; (M.N.); (T.T.); (Y.Y.); (S.Y.); (M.M.); (M.H.); (K.H.); (Y.K.)
| | - Takafumi Takase
- Allergy Center and Department of Clinical Research, Mie National Hospital, Tsu 514-0125, Japan; (M.N.); (T.T.); (Y.Y.); (S.Y.); (M.M.); (M.H.); (K.H.); (Y.K.)
| | - Yasuaki Yasuda
- Allergy Center and Department of Clinical Research, Mie National Hospital, Tsu 514-0125, Japan; (M.N.); (T.T.); (Y.Y.); (S.Y.); (M.M.); (M.H.); (K.H.); (Y.K.)
| | - Shingo Yamada
- Allergy Center and Department of Clinical Research, Mie National Hospital, Tsu 514-0125, Japan; (M.N.); (T.T.); (Y.Y.); (S.Y.); (M.M.); (M.H.); (K.H.); (Y.K.)
| | - Mayumi Matsunaga
- Allergy Center and Department of Clinical Research, Mie National Hospital, Tsu 514-0125, Japan; (M.N.); (T.T.); (Y.Y.); (S.Y.); (M.M.); (M.H.); (K.H.); (Y.K.)
| | - Miyuki Hoshi
- Allergy Center and Department of Clinical Research, Mie National Hospital, Tsu 514-0125, Japan; (M.N.); (T.T.); (Y.Y.); (S.Y.); (M.M.); (M.H.); (K.H.); (Y.K.)
| | - Kana Hamada
- Allergy Center and Department of Clinical Research, Mie National Hospital, Tsu 514-0125, Japan; (M.N.); (T.T.); (Y.Y.); (S.Y.); (M.M.); (M.H.); (K.H.); (Y.K.)
| | - Yu Kuwabara
- Allergy Center and Department of Clinical Research, Mie National Hospital, Tsu 514-0125, Japan; (M.N.); (T.T.); (Y.Y.); (S.Y.); (M.M.); (M.H.); (K.H.); (Y.K.)
- Department of Pediatrics, Ehime University Graduate School of Medicine, Toon 791-0295, Japan
| | - Takeshi Tsugawa
- Department of Pediatrics, Sapporo Medical University School of Medicine, Sapporo-shi 060-8543, Japan; (K.N.); (T.T.)
| | - Takao Fujisawa
- Allergy Center and Department of Clinical Research, Mie National Hospital, Tsu 514-0125, Japan; (M.N.); (T.T.); (Y.Y.); (S.Y.); (M.M.); (M.H.); (K.H.); (Y.K.)
- Correspondence: ; Tel.: +81-59-232-2531
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Krempski JW, Lama JK, Iijima K, Kobayashi T, Matsunaga M, Kita H. A Mouse Model of the “LEAP” Study Reveals a Role for CTLA-4 in Preventing Peanut Allergy Induced by Environmental Peanut Exposure. J Allergy Clin Immunol 2022; 150:425-439.e3. [PMID: 35288169 PMCID: PMC9378358 DOI: 10.1016/j.jaci.2022.02.024] [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: 09/08/2021] [Revised: 01/10/2022] [Accepted: 02/03/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND A human study, Learning Early About Peanut Allergy (LEAP), showed that early introduction of peanut products decreases the prevalence of peanut allergy among children. However, the immunologic mechanisms mediating the protective effects of consuming peanut products are not well understood. OBJECTIVE The objective was to develop a mouse model that simulates the LEAP study and investigate the underlying mechanisms for the study observations. METHODS Adult naive BALB/c mice were fed a commercial peanut butter product (Skippy) or buffer control and concomitantly exposed to peanut flour through the airway or skin to mimic environmental exposure. The animals were analyzed for anaphylactic reaction and by molecular and immunologic approaches. RESULTS After exposure to peanut flour through the airway or skin, naive mice developed peanut allergy, as demonstrated by acute and systemic anaphylaxis in response to challenge with peanut extract. Ingestion of Skippy, however, nearly abolished the increase in peanut-specific IgE and IgG and protected animals from developing anaphylaxis. Skippy-fed mice showed reduced numbers of T follicular helper (Tfh) cells and germinal center B cells in their draining lymph nodes, and single-cell RNA sequencing revealed a CD4+ T-cell population expressing cytotoxic T lymphocyte-associated protein 4 (CTLA-4) in these animals. Critically, blocking CTLA-4 with antibody increased levels of peanut-specific antibodies and reversed the protective effects of Skippy. CONCLUSION Ingestion of a peanut product protects mice from peanut allergy induced by environmental exposure to peanuts, and the CTLA-4 pathway, which regulates Tfh cell responses, likely plays a pivotal role in this protection.
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Matsunaga M, Iijima K, Hayashi R, Kobayashi T, Kita H. Development of Milk Allergy Models in Mice Induced by Epicutaneous Exposure. J Allergy Clin Immunol 2022. [DOI: 10.1016/j.jaci.2021.12.208] [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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Hamada K, Nagao M, Imakiire R, Furuya K, Mizuno Y, Sato Y, Matsunaga M, Yamada S, Nogami K, Hoshi M, Kobori T, Kainuma K, Iijima K, Fujisawa T. Factors associated with outcome of egg allergy 1 year after oral food challenge: A good baseline quality of life may be beneficial. Pediatr Allergy Immunol 2021; 32:1490-1496. [PMID: 33960022 DOI: 10.1111/pai.13534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 04/09/2021] [Accepted: 04/30/2021] [Indexed: 12/26/2022]
Abstract
BACKGROUND Safely liberalizing the diet to include an allergenic food may accelerate resolution of food allergy. The outcome of liberalization, however, varies among patients. METHODS We conducted a prospective observational study to identify factors associated with outcome for egg allergy 1 year after oral food challenge (OFC). We enrolled children <72 months old who had egg allergy and underwent OFC for determination of the safe intake quantity of egg allergen. Each child's baseline clinical background was recorded. Caregivers used the Food Allergy Quality of Life Questionnaire-Parent Form (FAQLQ-PF) to assess their children's QoL. Dietary advice based on the OFC result was provided to support safe egg consumption. At 1 year after OFC, the quantity of egg each child safely consumed in daily life was surveyed. We classified the outcome as Successful (Group S) if the quantity increased during the 1 year, or as Unsuccessful (Group U) if it did not. Factors associated with the outcome were investigated by multivariate logistic regression analysis. RESULTS A total of 93 children were enrolled, and after 1 year, 57 finished in Group S and 36 in Group U. The mean FAQLQ-PF score at baseline was significantly lower (ie, a better QoL) in Group S than in Group U. Multivariate logistic regression analysis identified a good QoL and absence of comorbid asthma or atopic dermatitis as factors predicting a favorable outcome. CONCLUSION QoL may affect food allergy outcome. Intervention focusing on the QoL may promote outgrowing of food allergies.
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Affiliation(s)
- Kana Hamada
- Allergy Center, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Mizuho Nagao
- Allergy Center, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Ryo Imakiire
- Allergy Center, National Hospital Organization Mie National Hospital, Tsu, Japan.,Department of Pediatrics, Kagoshima University School of Medicine, Kagoshima, Japan
| | - Kanae Furuya
- Allergy Center, National Hospital Organization Mie National Hospital, Tsu, Japan.,Aichi Konan College, Konan, Japan
| | - Yumi Mizuno
- Allergy Center, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Yasunori Sato
- Department of Preventive Medicine and Public Health, Keio University School of Medicine, Tokyo, Japan
| | - Mayumi Matsunaga
- Allergy Center, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Shingo Yamada
- Allergy Center, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Kazutaka Nogami
- Allergy Center, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Miyuki Hoshi
- Allergy Center, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Taiga Kobori
- Allergy Center, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Keigo Kainuma
- Allergy Center, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Kazumoto Iijima
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takao Fujisawa
- Allergy Center, National Hospital Organization Mie National Hospital, Tsu, Japan
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Matsunaga M, Kimura M, Ouchi T, Nakamura T, Ohyama S, Ando M, Nomura S, Azuma T, Ichinohe T, Shibukawa Y. Mechanical Stimulation-Induced Calcium Signaling by Piezo1 Channel Activation in Human Odontoblast Reduces Dentin Mineralization. Front Physiol 2021; 12:704518. [PMID: 34504437 PMCID: PMC8421527 DOI: 10.3389/fphys.2021.704518] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 08/03/2021] [Indexed: 11/13/2022] Open
Abstract
Odontoblasts play critical roles in dentin formation and sensory transduction following stimuli on the dentin surface. Exogenous stimuli to the dentin surface elicit dentinal sensitivity through the movement of fluids in dentinal tubules, resulting in cellular deformation. Recently, Piezo1 channels have been implicated in mechanosensitive processes, as well as Ca2+ signals in odontoblasts. However, in human odontoblasts, the cellular responses induced by mechanical stimulation, Piezo1 channel expression, and its pharmacological properties remain unclear. In the present study, we examined functional expression of the Piezo1 channel by recording direct mechanical stimulation-induced Ca2+ signaling in dentin matrix protein 1 (DMP-1)-, nestin-, and dentin sialophosphoprotein (DSPP)-immunopositive human odontoblasts. Mechanical stimulation of human odontoblasts transiently increased intracellular free calcium concentration ([Ca2+]i). Application of repeated mechanical stimulation to human odontoblasts resulted in repeated transient [Ca2+]i increases, but did not show any desensitizing effects on [Ca2+]i increases. We also observed a transient [Ca2+]i increase in the neighboring odontoblasts to the stimulated cells during mechanical stimulation, showing a decrease in [Ca2+]i with an increasing distance from the mechanically stimulated cells. Application of Yoda1 transiently increased [Ca2+]i. This increase was inhibited by application of Gd3+ and Dooku1, respectively. Mechanical stimulation-induced [Ca2+]i increase was also inhibited by application of Gd3+ or Dooku1. When Piezo1 channels in human odontoblasts were knocked down by gene silencing with short hairpin RNA (shRNA), mechanical stimulation-induced [Ca2+]i responses were almost completely abolished. Piezo1 channel knockdown attenuated the number of Piezo1-immunopositive cells in the immunofluorescence analysis, while no effects were observed in Piezo2-immunopositive cells. Alizarin red staining distinctly showed that pharmacological activation of Piezo1 channels by Yoda1 significantly suppressed mineralization, and shRNA-mediated knockdown of Piezo1 also significantly enhanced mineralization. These results suggest that mechanical stimulation predominantly activates intracellular Ca2+ signaling via Piezo1 channel opening, rather than Piezo2 channels, and the Ca2+ signal establishes intercellular odontoblast-odontoblast communication. In addition, Piezo1 channel activation participates in the reduction of dentinogenesis. Thus, the intracellular Ca2+ signaling pathway mediated by Piezo1 channels could contribute to cellular function in human odontoblasts in two ways: (1) generating dentinal sensitivity and (2) suppressing physiological/reactional dentinogenesis, following cellular deformation induced by hydrodynamic forces inside dentinal tubules.
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Affiliation(s)
- Mayumi Matsunaga
- Department of Physiology, Tokyo Dental College, Tokyo, Japan.,Department of Dental Anesthesiology, Tokyo Dental College, Tokyo, Japan
| | - Maki Kimura
- Department of Physiology, Tokyo Dental College, Tokyo, Japan
| | - Takehito Ouchi
- Department of Physiology, Tokyo Dental College, Tokyo, Japan
| | | | - Sadao Ohyama
- Department of Physiology, Tokyo Dental College, Tokyo, Japan
| | - Masayuki Ando
- Department of Physiology, Tokyo Dental College, Tokyo, Japan
| | - Sachie Nomura
- Department of Physiology, Tokyo Dental College, Tokyo, Japan
| | - Toshifumi Azuma
- Department of Biochemistry, Tokyo Dental College, Tokyo, Japan
| | - Tatsuya Ichinohe
- Department of Dental Anesthesiology, Tokyo Dental College, Tokyo, Japan
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Matsunaga M, Kataoka Y, Igarashi Y, Fukui T, Imura M, Horiuchi S. Breastfeeding support and barriers to women with gestational diabetes mellitus: a nationwide cross-sectional survey of hospitals in Japan. BMC Pregnancy Childbirth 2021; 21:555. [PMID: 34388970 PMCID: PMC8364088 DOI: 10.1186/s12884-021-04032-9] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 07/29/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Despite the benefits of breastfeeding for women with Gestational Diabetes Mellitus (GDM) and their infants, breastfeeding is less likely to be performed by this group. This study aimed to examine the current levels of implementation of breastfeeding support to women with GDM in Japan and to clarify barriers to promoting breastfeeding among this population. METHODS A 25-item questionnaire was developed by the authors to investigate the current levels of implementation of breastfeeding support for women with GDM provided in hospitals, and to explore barriers for promoting breastfeeding among these women. The questionnaire was sent to all 1046 hospitals facilitating childbirth in Japan. Descriptive statistics were used to analyze the quantitative data, and content analysis was used to analyze qualitative data from the open-ended questions. RESULTS All 296 respondents were included in this study. Regarding breastfeeding support, 95.2% of the respondents provided general information on breastfeeding to GDM women during antenatal midwife consultations. However, the benefits of breastfeeding for preventing type 2 diabetes were addressed by only 48.0%. Likewise, although follow-up services (e.g., telephone support or breastfeeding consultations) were conducted in 88.9% of hospitals, only 50.7% of hospitals informed women that breastfeeding decreases the risk of developing type 2 diabetes after GDM. Regarding barriers, seven categories and 20 subcategories about promoting breastfeeding for women with GDM were extracted and abstracted into the following three themes: Barriers associated with mother and infant, Barriers associated with health professionals, and Organizational barriers. CONCLUSIONS In Japan, most hospitals that responded provided general breastfeeding support from the antenatal to postpartum periods. However, the benefits of breastfeeding in terms of preventing the incidence of type 2 diabetes following GDM were insufficiently communicated to women with GDM. Furthermore, there were numerous barriers to promoting breastfeeding among women with GDM.
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Affiliation(s)
- Mayumi Matsunaga
- St. Luke's International University- Graduate School, Women's Health and Midwifery, Tokyo, Japan.
| | - Yaeko Kataoka
- St. Luke's International University- Graduate School, Women's Health and Midwifery, Tokyo, Japan
- Midwifery Policy Committee, Japan Academy of Midwifery, Tokyo, Japan
| | - Yumiko Igarashi
- St. Luke's International University- Graduate School, Women's Health and Midwifery, Tokyo, Japan
| | - Toshiko Fukui
- Japanese Nursing Association, Executive Board, Tokyo, Japan
| | - Masumi Imura
- Midwifery Policy Committee, Japan Academy of Midwifery, Tokyo, Japan
- Global Health Care and Midwifery, Graduate School of Nursing, Japanese Red Cross College of Nursing, Tokyo, Japan
| | - Shigeko Horiuchi
- St. Luke's International University- Graduate School, Women's Health and Midwifery, Tokyo, Japan
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12
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Matsunaga M, Horiuchi S, Kataoka Y, Igarashi Y, Porter SE, Fukui T. Continuous interprofessional collaboration for women with gestational diabetes mellitus: A cross-sectional survey in Japan. Jpn J Nurs Sci 2021; 18:e12438. [PMID: 34235854 DOI: 10.1111/jjns.12438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/28/2021] [Accepted: 05/20/2021] [Indexed: 11/26/2022]
Abstract
AIM This study aimed to identify the current situation of interprofessional collaboration for gestational diabetes mellitus (GDM) management in Japan including the professionals involved, the collaboration methods employed, and the barriers perceived by nurses and midwives. METHODS This nationwide cross-sectional survey of 1,046 total hospitals facilitating childbirth in Japan used an original 60-item questionnaire to investigate GDM management practice through interprofessional collaboration. The questionnaire required one responder to be a midwife or nurse who was familiar with the management practices for GDM women in their respective hospitals. Quantitative data were analyzed using descriptive statistics, and framework analysis was conducted for qualitative data collected by open-ended questions. RESULTS All 308 respondents (response rate 29.4%) were included. The professionals included in interprofessional collaboration were limited, and the only strategy used for interprofessional collaboration by a majority (91.5%) of hospitals was medical charts. There were 50.8% of hospitals that provided postpartum GDM follow-ups and 54.5% of hospitals that did not engage in external collaboration for GDM management. The barriers to interprofessional collaboration extracted were seven categories and 23 subcategories, which were aligned within the following units of analysis: individual, team, organization, and community. CONCLUSIONS This survey shows that interprofessional collaboration, including support for GDM postpartum follow-up in Japan remains insufficient. Furthermore, nurses and midwives perceive numerous barriers to interprofessional collaboration for continuous GDM management at the individual, team, organizational and community levels.
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Affiliation(s)
- Mayumi Matsunaga
- Women's Health and Midwifery, St. Luke's International University-Graduate School, Tokyo, Japan
| | - Shigeko Horiuchi
- Women's Health and Midwifery, St. Luke's International University-Graduate School, Tokyo, Japan
| | - Yaeko Kataoka
- Women's Health and Midwifery, St. Luke's International University-Graduate School, Tokyo, Japan.,Midwifery Policy Committee, Japan Academy of Midwifery, Tokyo, Japan
| | - Yumiko Igarashi
- Women's Health and Midwifery, St. Luke's International University-Graduate School, Tokyo, Japan
| | - Sarah E Porter
- Educational Advisor, St. Luke's International University, Tokyo, Japan
| | - Toshiko Fukui
- Japanese Nursing Association, Executive Board, Tokyo, Japan
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13
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Inuzuka Y, Natsume O, Matsunaga M, Monna Y, Okada E, Kato Y, Taguchi T. Washing with water alone versus soap in maintaining remission of eczema. Pediatr Int 2020; 62:663-668. [PMID: 32131146 DOI: 10.1111/ped.14216] [Citation(s) in RCA: 4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/31/2020] [Accepted: 02/25/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND There is no consensus on the use of soap in skin care for atopic dermatitis in Japan. Thus, this study aimed to evaluate the efficacy of soap to maintain eczema remission in atopic dermatitis patients during the fall-winter period in Japan. METHODS This assessor-blinded, pragmatic randomized, non-inferiority study enrolled atopic dermatitis patients whose eczema was controlled by regular steroid ointment application less than or equal to 2 days / week (tacrolimus ointment was permitted). For 8 ± 3 weeks, participants washed their upper and lower limbs on one side with soap (soap side) and on the other side with water alone (water side). The primary outcome was an Eczema Area and Severity Index score at week 8 ± 3. RESULTS Twenty-nine participants were analyzed. The Eczema Area and Severity Index scores at week 8 ± 3 of the water and soap sides were 0.0 (0.0-0.4) and 0.0 (0.0-0.4), respectively (P = 0.18). The difference between both sides was -0.02 (-0.11-0.08), and the limits of the 95% confidence interval did not reach the prespecified non-inferiority margin. The average Patient-Oriented Eczema Measure score was 1.27 ± 1.7 and 1.32 ± 1.8 for the water and soap sides, respectively (P = 0.92). The total number of additional steroid ointment applications was four (0-20) times and six (0-23) times, respectively (P = 0.98). Participants were categorized according to self-assessments of the usefulness of soap, with 2, 24, and 3 participants in the water-effective, invariant, and soap-effective groups, respectively. CONCLUSIONS For children with controlled atopic dermatitis, washing with water alone was not inferior to washing with soap for maintaining remission of eczema during the fall-winter period in Japan.
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Affiliation(s)
- Yusuke Inuzuka
- Division of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan.,Division of Allergy, Department of Medical Subspecialties, National Center for Child Health and Development, Tokyo, Japan
| | - Osamu Natsume
- Division of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Mayumi Matsunaga
- Division of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yoko Monna
- Division of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Eisaku Okada
- Division of Community Health and Preventive Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yukiko Kato
- Division of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Tomohide Taguchi
- Division of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
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14
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Hoshi M, Matsunaga M, Nogami K, Hamada K, Kobori T, Kainuma K, Nagao M, Fujisawa T. Three cases of severe adolescent asthma treated with mepolizumab: lung function trajectories. Asia Pac Allergy 2020; 10:e13. [PMID: 32411578 PMCID: PMC7203436 DOI: 10.5415/apallergy.2020.10.e13] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 04/02/2020] [Indexed: 12/19/2022] Open
Abstract
Real-world experience with mepolizumab for pediatric asthma is still limited. We report 3 patients who were treated with mepolizumab for severe adolescent asthma. Two patients, a 12-year-old boy and a 14-year-old girl, responded well to mepolizumab and showed apparent improvement in lung function from a downward trend over time before treatment. The third patient, a 16-year-old boy, whose treatment was switched from omalizumab to mepolizumab, did not have satisfactory response. The 2 successful cases had eosinophil counts of 440 and 371/μL and multiple comorbid allergic diseases including food allergies. The clinical benefit to them included elimination of both exacerbation and exercise-induced asthma. Interestingly, the boy's food-induced gastrointestinal symptoms disappeared following start of mepolizumab treatment.
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Affiliation(s)
- Miyuki Hoshi
- Department of Clinical Research, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Mayumi Matsunaga
- Department of Clinical Research, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Kazutaka Nogami
- Department of Clinical Research, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Kana Hamada
- Department of Clinical Research, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Taiga Kobori
- Department of Clinical Research, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Keigo Kainuma
- Department of Clinical Research, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Mizuho Nagao
- Department of Clinical Research, National Hospital Organization Mie National Hospital, Tsu, Japan
| | - Takao Fujisawa
- Department of Clinical Research, National Hospital Organization Mie National Hospital, Tsu, Japan
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15
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Natsume O, Inuzuka Y, Matsunaga M, Kato Y, Hakamata A, Mizoguchi Y, Taguchi T. Low Dose Oral Immunotherapy In Children With Egg and Milk Allergies: A Retrospective Case Series Study. J Allergy Clin Immunol 2019. [DOI: 10.1016/j.jaci.2018.12.839] [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: 10/27/2022]
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16
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Matsunaga M, Sakai A, Kato Y, Koda M, Takayanagi F, Inuzuka Y, Mizoguchi Y, Hakamata A, Taguchi T, Natsume O. Evaluation of Peanut Sublingual Immunotherapy for Peanut Allergy: A Pilot Study. J Allergy Clin Immunol 2019. [DOI: 10.1016/j.jaci.2018.12.833] [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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17
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Inuzuka Y, Monna Y, Matsunaga M, Kato Y, Taguchi T, Natsume O. An Assessor-Blinded, Left-Right Comparison Study Of Washing With Water Alone Versus Soap In Maintaining Remission Of Eczema In Fall-Winter. J Allergy Clin Immunol 2019. [DOI: 10.1016/j.jaci.2018.12.404] [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: 11/29/2022]
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18
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Finken KH, Reiter D, Denner T, Dippel KH, Hobirk J, Mank G, Kever H, Wolf GH, Noda N, Miyahara A, Shoji T, Sato KN, Akaishi K, Boedo JA, Brooks JN, Conn RW, Corbett WJ, Doerner RP, Goebel D, Gray DS, Hillis DL, Hogan J, Mcgrath RT, Matsunaga M, Moyer R, Nygren RE, Watkins J. The Toroidal Pump Limiter ALT-II in TEXTOR. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a694] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. H. Finken
- Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - D. Reiter
- Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - T. Denner
- Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - K. H. Dippel
- Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - J. Hobirk
- Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - G. Mank
- Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - H. Kever
- Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - G. H. Wolf
- Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - N. Noda
- Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - A. Miyahara
- National Institute for Fusion Science, Orochi-Cho, Toki, Gifu, Japan
| | - T. Shoji
- Nagoya University, Department of Energy Engineering and Science, 464-8603 Nagoya, Japan
| | - K. N. Sato
- National Institute for Fusion Science, Orochi-Cho, Toki, Gifu, Japan
| | - K. Akaishi
- National Institute for Fusion Science, Orochi-Cho, Toki, Gifu, Japan
| | - J. A. Boedo
- University of California, San Diego, Department of Applied Mechanics and Engineering Sciences San Diego, California
| | | | - R. W. Conn
- University of California, San Diego, Department of Applied Mechanics and Engineering Sciences San Diego, California
| | - W. J. Corbett
- University of California, San Diego, Department of Applied Mechanics and Engineering Sciences San Diego, California
| | - R. P. Doerner
- University of California, San Diego, Department of Applied Mechanics and Engineering Sciences San Diego, California
| | - D. Goebel
- University of California, San Diego, Department of Applied Mechanics and Engineering Sciences San Diego, California
| | - D. S. Gray
- University of California, San Diego, Department of Applied Mechanics and Engineering Sciences San Diego, California
| | - D. L. Hillis
- Oak Ridge National Laboratory, Building 9201-2, MS-8072, Oak Ridge, Tennessee
| | - J. Hogan
- Oak Ridge National Laboratory, Building 9201-2, MS-8072, Oak Ridge, Tennessee
| | - R. T. Mcgrath
- Sandia National Laboratories, Albuquerque, New Mexico
| | - M. Matsunaga
- Toyama University, Hydrogen Isotope Research Center, Gofuku 3190, Toyama 930-8555, Japan
| | - R. Moyer
- University of California, San Diego, Department of Applied Mechanics and Engineering Sciences San Diego, California
| | - R. E. Nygren
- Sandia National Laboratories, Albuquerque, New Mexico
| | - J. Watkins
- Sandia National Laboratories, Albuquerque, New Mexico
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19
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He G, Ramamoorthy H, Kwan CP, Lee YH, Nathawat J, Somphonsane R, Matsunaga M, Higuchi A, Yamanaka T, Aoki N, Gong Y, Zhang X, Vajtai R, Ajayan PM, Bird JP. Thermally Assisted Nonvolatile Memory in Monolayer MoS 2 Transistors. Nano Lett 2016; 16:6445-6451. [PMID: 27680095 DOI: 10.1021/acs.nanolett.6b02905] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We demonstrate a novel form of thermally-assisted hysteresis in the transfer curves of monolayer MoS2 FETs, characterized by the appearance of a large gate-voltage window and distinct current levels that differ by a factor of ∼102. The hysteresis emerges for temperatures in excess of 400 K and, from studies in which the gate-voltage sweep parameters are varied, appears to be related to charge injection into the SiO2 gate dielectric. The thermally-assisted memory is strongly suppressed in equivalent measurements performed on bilayer transistors, suggesting that weak screening in the monolayer system plays a vital role in generating its strongly sensitive response to the charge-injection process. By exploiting the full features of the hysteretic transfer curves, programmable memory operation is demonstrated. The essential principles demonstrated here point the way to a new class of thermally assisted memories based on atomically thin two-dimensional semiconductors.
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Affiliation(s)
- G He
- Department of Electrical Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260-1900, United States
| | - H Ramamoorthy
- Department of Electrical Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260-1900, United States
| | - C-P Kwan
- Department of Physics, University at Buffalo, The State University of New York , Buffalo, New York 14260-1500, United States
| | - Y-H Lee
- Department of Electrical Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260-1900, United States
| | - J Nathawat
- Department of Electrical Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260-1900, United States
| | - R Somphonsane
- Department of Physics, King Mongkut's Institute of Technology Ladkrabang , Bangkok 10520, Thailand
| | - M Matsunaga
- Graduate School of Advanced Integration Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - A Higuchi
- Graduate School of Advanced Integration Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - T Yamanaka
- Graduate School of Advanced Integration Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - N Aoki
- Graduate School of Advanced Integration Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Y Gong
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - X Zhang
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - R Vajtai
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - P M Ajayan
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - J P Bird
- Department of Electrical Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260-1900, United States
- Graduate School of Advanced Integration Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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20
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Abstract
Five new ursane-type triterpenoids 1-5, and one new oleanane-type triterpenoids 7 were isolated from the MeOH extract of the aerial parts of Maytenus diversifolia. Their structures were elucidated by analyzing spectroscopic data and chemical transformation. Compounds 3 and 5 exhibited significant lethal activity in the brine shrimp lethality test (BST).
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Affiliation(s)
- Narumi Anoda
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
| | - Mayumi Matsunaga
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
| | - Miwa Kubo
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
| | - Kenichi Harada
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
| | - Yoshiyasu Fukuyama
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima 770-8514, Japan
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21
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Anoda N, Matsunaga M, Kubo M, Harada K, Fukuyama Y. Six New Triterpenoids from the Aerial Parts of Maytenus diversifolia. Nat Prod Commun 2016; 11:1085-1088. [PMID: 30725563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023] Open
Abstract
Five new ursane-type triterpenoids 1-5, and one new oleanane-type triterpenoids 7 were isolated from the MeOH extract of the aerial parts of Maytenus diversifolia. Their structures were elucidated by analyzing spectroscopic data and chemical transformation. Compounds 3 and 5 exhibited significant lethal activity in the brine shrimp lethality test (BST).
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22
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Chuang C, Matsunaga M, Liu FH, Woo TP, Aoki N, Lin LH, Wu BY, Ochiai Y, Liang CT. Probing weak localization in chemical vapor deposition graphene wide constriction using scanning gate microscopy. Nanotechnology 2016; 27:075601. [PMID: 26762929 DOI: 10.1088/0957-4484/27/7/075601] [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] [Indexed: 06/05/2023]
Abstract
Low-temperature scanning gate microscopy (LT-SGM) studies of graphene allow one to obtain important spatial information regarding coherent transport such as weak localization (WL) and universal conductance fluctuations. Although fascinating LT-SGM results on pristine graphene prepared by mechanical exfoliation have been reported in the literature, there appears to be a dearth of LT-SGM results on chemical vapor deposition (CVD)-grown graphene whose large scale and flexible substrate transferability make it an ideal candidate for coherent electronic applications. To this end, we have performed LT-SGM studies on CVD-grown graphene wide constriction (0.8 μm), which can be readily prepared by cost-effective optical lithography fully compatible with those in wafer foundry, in the WL regime. We find that the movable local gate can sensitively modulate the total conductance of the CVD graphene constriction possibly due to the intrinsic grain boundaries and merged domains, a great advantage for applications in coherent electronics. Moreover, such a conductance modulation by LT-SGM provides an additional, approximately magnetic-field-independent probe for studying coherent transport such as WL in graphene and spatial conductance variation.
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Affiliation(s)
- C Chuang
- Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan. Graduate Institute of Applied Physics, National Taiwan University, Taipei 106, Taiwan
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23
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He G, Ghosh K, Singisetti U, Ramamoorthy H, Somphonsane R, Bohra G, Matsunaga M, Higuchi A, Aoki N, Najmaei S, Gong Y, Zhang X, Vajtai R, Ajayan PM, Bird JP. Conduction Mechanisms in CVD-Grown Monolayer MoS2 Transistors: From Variable-Range Hopping to Velocity Saturation. Nano Lett 2015; 15:5052-8. [PMID: 26121164 DOI: 10.1021/acs.nanolett.5b01159] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We fabricate transistors from chemical vapor deposition-grown monolayer MoS2 crystals and demonstrate excellent current saturation at large drain voltages (Vd). The low-field characteristics of these devices indicate that the electron mobility is likely limited by scattering from charged impurities. The current-voltage characteristics exhibit variable range hopping at low Vd and evidence of velocity saturation at higher Vd. This work confirms the excellent potential of MoS2 as a possible channel-replacement material and highlights the role of multiple transport phenomena in governing its transistor action.
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Affiliation(s)
- G He
- †Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260-1900, United States
| | - K Ghosh
- †Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260-1900, United States
| | - U Singisetti
- †Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260-1900, United States
| | - H Ramamoorthy
- †Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260-1900, United States
| | - R Somphonsane
- ‡Department of Physics, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand
| | - G Bohra
- †Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260-1900, United States
| | - M Matsunaga
- §Graduate School of Advanced Integration Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - A Higuchi
- §Graduate School of Advanced Integration Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - N Aoki
- §Graduate School of Advanced Integration Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - S Najmaei
- ∥Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Y Gong
- ∥Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - X Zhang
- ∥Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - R Vajtai
- ∥Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - P M Ajayan
- ∥Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - J P Bird
- †Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260-1900, United States
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25
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Sanefuji M, Yamashita H, Torisu H, Takada Y, Imanaga H, Matsunaga M, Ishizaki Y, Sakai Y, Yoshida K, Hara T. Altered strategy in short-term memory for pictures in children with attention-deficit/hyperactivity disorder: a near-infrared spectroscopy study. Psychiatry Res 2014; 223:37-42. [PMID: 24840133 DOI: 10.1016/j.pscychresns.2014.04.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 02/21/2014] [Accepted: 04/23/2014] [Indexed: 11/16/2022]
Abstract
Strategy in short-term memory for serially presented pictures shifts gradually from a non-phonological to a phonological method as memory ability increases during typical childhood development. However, little is known about the development of this strategic change in children with attention-deficit/hyperactivity disorder (ADHD). To understand the neural basis of ADHD, we investigated short-term memory strategies using near-infrared spectroscopy. ADHD children aged from 6 to 12 years and age- and sex-matched control children were assessed in this study. Regional activity was monitored in the left ventrolateral prefrontal cortex to assess strategies used during short-term memory for visual or phonological objects. We examined the hypothesis that the strategic methods used would be correlated with memory ability. Higher memory ability and the phonological strategy were significantly correlated in the control group but not in the ADHD group. Intriguingly, ADHD children receiving methylphenidate treatment exhibited increased use of phonological strategy compared with those without. In conclusion, we found evidence of an altered strategy in short-term memory in ADHD children. The modulatory effect of methylphenidate indicates its therapeutic efficacy.
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Affiliation(s)
- Masafumi Sanefuji
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Hiroshi Yamashita
- Department of Child Psychiatry, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hiroyuki Torisu
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yui Takada
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hisako Imanaga
- Department of Child Psychiatry, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Mayumi Matsunaga
- Department of Child Psychiatry, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yoshito Ishizaki
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yasunari Sakai
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Keiko Yoshida
- Department of Child Psychiatry, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Toshiro Hara
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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Yamauchi H, Goto T, Takayoshi K, Sagara K, Uoi M, Kawanabe C, Matsunaga M, Miyoshi T, Uchino K, Misumi N, Nishino T. A retrospective analysis of the risk factors for allergic reactions induced by the administration of oxaliplatin. Eur J Cancer Care (Engl) 2013; 24:111-6. [PMID: 24304429 DOI: 10.1111/ecc.12156] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2013] [Indexed: 11/29/2022]
Abstract
This study retrospectively investigated the clinical features and risk factors of allergic reactions induced by oxaliplatin administration. This study investigated the incidence of allergic reactions and analysed the background and laboratory data in patients with colorectal cancer treated with oxaliplatin-based chemotherapy at Kyushu Medical Center between April 2012 and September 2012. A total of 62 patients were included in this study. The number of patients in the allergic and non-allergic groups was 7 and 55 respectively. The incidence of allergic reactions was 11.3%. We compared the patients' characteristics and laboratory data between the two groups and found that the average dose of dexamethasone in the allergic group was significantly lower than that observed in the non-allergic group (P = 0.0111). Furthermore, the incidence of allergic reactions in the group that received prophylaxis of less than 12 mg of dexamethasone was significantly higher than that observed in the group that received more than 12 mg of dexamethasone (P = 0.0103). In conclusion, a lower dexamethasone dose is a possible risk factor for allergic reactions induced by the administration of oxaliplatin; however, given the retrospective design used in this study, further validation of this finding is warranted.
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Affiliation(s)
- H Yamauchi
- Department of Pharmacy and Clinical Research Institute, National Hospital Organization, Kyushu Medical Center, Fukuoka, Japan
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Matsunaga M, Hurwitz E, Novotny R. Child Fruit and Vegetable Accordance with the DASH Eating Plan in the PacDASH Study. J Acad Nutr Diet 2013. [DOI: 10.1016/j.jand.2013.06.259] [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: 10/26/2022]
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Matsunaga M, Hurwitz E. Trends in Caffeine Intake among U.S. Teenagers and Adults Aged 20-50: National Health and Nutrition Examination Survey, 2003-2010. J Acad Nutr Diet 2013. [DOI: 10.1016/j.jand.2013.06.298] [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: 10/26/2022]
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Ohira H, Matsunaga M, Murakami H, Osumi T, Fukuyama S, Shinoda J, Yamada J. Neural mechanisms mediating association of sympathetic activity and exploration in decision-making. Neuroscience 2013; 246:362-74. [PMID: 23643977 DOI: 10.1016/j.neuroscience.2013.04.050] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 04/02/2013] [Accepted: 04/25/2013] [Indexed: 11/19/2022]
Abstract
The somatic marker hypothesis asserts that decision-making can be guided by feedback of bodily states to the brain. In line with this hypothesis, the present study tested whether sympathetic activity shows an association with a tonic dimension of decision-making, exploratory tendency represented by entropy in information theory, and further examined the neural mechanisms of the association. Twenty participants performed a stochastic reversal learning task that required decision-making in an unstable and uncertain situation. Regional cerebral blood flow was evaluated using (15)O-water positron emission tomography (PET), and cardiovascular indices and concentrations of catecholamine in peripheral blood were also measured, during the task. In reversal learning, increased epinephrine during the task positively correlated with larger entropy, indicating a greater tendency for exploration in decision-making. The increase of epinephrine also correlated with brain activity revealed by PET in the somatosensory cortices, anterior insula, dorsal anterior cingulate cortex, and the dorsal pons. This result is consistent with previously reported brain matrixes of representation of bodily states and interoception. In addition, activity of the anterior insula specifically correlated with entropy, suggesting possible mediation of this brain region between peripheral sympathetic arousal and exploration in decision-making. These findings shed a new light about a role of bodily states in decision-making and underlying neural mechanisms.
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Affiliation(s)
- H Ohira
- Department of Psychology, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.
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Ohira H, Matsunaga M, Kimura K, Murakami H, Osumi T, Isowa T, Fukuyama S, Shinoda J, Yamada J. Chronic stress modulates neural and cardiovascular responses during reversal learning. Neuroscience 2011; 193:193-204. [PMID: 21763760 DOI: 10.1016/j.neuroscience.2011.07.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2011] [Revised: 06/17/2011] [Accepted: 07/06/2011] [Indexed: 11/26/2022]
Abstract
Animal studies have revealed that chronic stress shifts cognitive strategies from the flexible goal-directed action to the simple and rigid habit action. In addition, stress-induced atrophy in the prefrontal cortex and dorsomedial striatum which are involved in the goal-directed action and hypertrophy of the dorsolateral striatum which is critical for the habit action were parallel with the effects of chronic stress on behaviors. The present study tested whether these previous findings in animal studies are compatible in humans by analyzing effects of chronic stress on neural and cardiovascular responses, which are likely important for performing appropriate actions. Twenty healthy men exposed to low or high chronic job stress performed a stochastic reversal learning task, which required cognitive flexibility and the goal-directed action. Regional cerebral blood flow was evaluated during the task using (15)O-water positron emission tomography, and cardiovascular parameters such as blood pressure and heart rate were also measured. During the reversal learning task, whereas participants with low chronic job stress exhibited activity in the anterior caudate, as well as orbitofrontal cortex, ventrolateral prefrontal cortex, insula, and midbrain, which might be related to the goal-directed action, participants with high chronic job stress exhibited no activity in such brain regions. Furthermore, participants with high chronic job stress exhibited less reactivity in diastolic blood pressure, which might be mediated by anterior cingulate cortical activity. These findings, in line with previous studies, suggested that chronic job stress correlates with less activity in brain regions related to the goal-directed action, and insensitive physiological responses in humans.
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Affiliation(s)
- H Ohira
- Department of Psychology, Nagoya University, Nagoya 464-8601, Japan.
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Matsunaga M, Konagaya T, Nogimori T, Yoneda M, Kasugai K, Ohira H, Kaneko H. Inhibitory effect of oxytocin on accelerated colonic motility induced by water-avoidance stress in rats. Neurogastroenterol Motil 2009; 21:856-e59. [PMID: 19298230 DOI: 10.1111/j.1365-2982.2009.01286.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Recent studies have indicated that brain and gut activities are interrelated and exposure to several stressors, such as water-avoidance stress, stimulates the motor function of the gut through corticotropin-releasing factor (CRF)-signalling pathways in the brain. Central oxytocin is known to attenuate stress responses, including CRF expression in the brain. Here, we examined whether central oxytocin attenuated the acceleration of colonic motility induced by water-avoidance stress. A force transducer was attached to the distal colon of male rat, and the colonic motility and faecal pellet output were recorded while the rats were exposed to water-avoidance stress. Intracerebroventricular (i.c.v.) injections of oxytocin (5, 50 and 500 pmol) and the oxytocin receptor antagonist tocinoic acid (25 microg) were administered before exposure to water-avoidance stress, and the effect of oxytocin on colonic motor function was determined. Centrally administered oxytocin inhibited the accelerated colonic motility induced by water-avoidance stress. The effective dose ranged between 5 and 50 pmol on i.c.v. injection. Oxytocin also decreased the number of CRF-positive cells in the paraventricular nucleus and corticosterone release. The inhibitory effect of oxytocin on accelerated colonic motility was blocked by pretreatment with oxytocin receptor antagonist. Furthermore, centrally administered tocinoic acid enhanced the acceleration of colonic motility. These results suggested that endogenous central oxytocin may contribute to the regulation of colonic function and inhibit the brain CRF-signalling pathways targeting the gut, resulting in the inhibition of stress-induced colonic contractions.
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Affiliation(s)
- M Matsunaga
- Department of Neurology, Ban Buntane Hotokukai Hospital, Fujita Health University, Aichi, Japan
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Kokeguchi S, Goto S, Hashimoto H, Matsunaga M, Umekage H, Shiotani M. Relationship beween serum chlamydia trachomatis antibody and tubal damage in infertile women. Fertil Steril 2008. [DOI: 10.1016/j.fertnstert.2008.07.074] [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: 10/21/2022]
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Matsunaga M, Homma T, Tanaka A. Investigation of Vapor Adsorption on Molybdenum Disulfide Surfaces by Auger Electron Spectroscopy. ACTA ACUST UNITED AC 2008. [DOI: 10.1080/05698198208983097] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Takeichi M, Hatta K, Nose A, Nagafuchi A, Matsunaga M. Cadherin-mediated specific cell adhesion and animal morphogenesis. Ciba Found Symp 2007; 144:243-9; discussion 250-4, 290-5. [PMID: 2673680 DOI: 10.1002/9780470513798.ch14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Cadherins are a family of transmembrane glycoproteins which are responsible for Ca2+-dependent cell-cell adhesion. Each member of the family displays a unique pattern of tissue distribution. The expression of cadherin molecules in an embryo is spatiotemporally regulated so as to be associated with a variety of morphogenetic events. Antibodies against cadherins perturb the morphogenesis of tissues, indicating their importance in tissue formation. When cells were transfected with cDNAs encoding cadherins, they expressed the exogenous cadherin molecules and these were functional. Using these transfected cells, we tested whether each member of the cadherin family has a binding specificity, and found that cells preferentially adhere to those expressing the identical cadherin type. The cadherin-mediated specific adhesion also occurred in the attachment of neurites to the surface of other cells. These observations suggest that cadherins are crucial for the selective adhesiveness of cells, and thus for the embryonic morphogenetic processes in which specific adhesive interactions of cells are involved.
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Affiliation(s)
- M Takeichi
- Department of Biophysics, Faculty of Science, Kyoto University, Japan
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Kato M, Nogimura H, Hasegawa H, Nakano H, Nagayama M, Honjo Y, Takeuchi R, Shirasaki Y, Matsunaga M, Suzuki K, Kazui T. [Usefulness of the thoracoscopic surgery under local anesthesia and irrigation for the patient with Bacillus cereus empyema; report of a case]. Kyobu Geka 2007; 60:865-7. [PMID: 17703630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The case was 54-year-old male with some risks such as chronic heart failure, atrial fibrillation, and liver chirrhosis. He was admitted because of severe back pain and diagnosed as empyema by preoperative thoracentesis. By thoracoscopic procedures under local anesthesia, fibrinopurulent tissues were cleaned as much as possible and 3 of chest tubes were replaced. The final diagnosis was Bacillus cereus pyothorax by bacterial cultures of pleural effusion. Intrathoracic cavity was cleaned with physiological saline solution. The patient made favorable progress and recovered. Thoracoscopic surgery under local anesthesia with thoracic irrigation was so effective and safe methods to control the infection.
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Affiliation(s)
- M Kato
- Department of Thoracic Surgery, Haibara General Hospital, Makinohara, Japan
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Miwa M, Matsunaga M, Nakajima N, Yamaguchi S, Watanabe K. Hypertonic saline alters electrical barrier of the airway epithelium. Otolaryngol Head Neck Surg 2007; 136:62-6. [PMID: 17210335 DOI: 10.1016/j.otohns.2006.08.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2006] [Accepted: 08/16/2006] [Indexed: 11/24/2022]
Abstract
OBJECTIVE The effect of tonicity changes in nebulizer solutions and irrigations on nasal mucosa is not well known. The present study aims to determine the basic mechanism of hypertonic solution on airway epithelial barrier. STUDY DESIGN AND SETTING We investigated the electrical potential difference (PD) that is influenced by both active transport and the transepithelial electrical resistance of the epithelial mucosa in the human nose in vivo. The short circuit current (SCC) revealed net ion transport across the epithelium in the guinea pig trachea in vitro. Finally, the size dependency of macromolecules across the tracheal mucosa was determined in vitro using FITC-labeled dextrans of different sizes. RESULTS PD was significantly decreased after topical application of hypertonic solution both in human and in guinea pig nose. SCC was significantly decreased after application of hypertonic solution. The transport of these dextrans from the basolateral to the apical side was not increased significantly after apical application of hypertonic saline. CONCLUSIONS Hypertonic saline enhances the electrical permeability of the airway epithelial mucosa but not transport of macromolecule in the short term.
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Affiliation(s)
- Masato Miwa
- Department of Otolaryngology, Dokkyo University School of Medicine, Koshigaya Hospital, Saitama, Tokyo, Japan
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Abstract
BACKGROUND Regulation of the barrier function in the nasal epithelium seems to be affected by the pathogenesis of allergic rhinitis. The measurement of transepidermal water loss has proven to be an important noninvasive method for assessing the efficiency of the skin as a protective barrier. Although the nasal mucosal epithelium also has such a protective function, the precise mechanism still is unknown. METHODS We studied the alteration of nasal mucosal water loss in the basal state and after the nontraumatic applications of physiological saline, hypertonic saline (10% NaCl), nasal barrier cream, and 10% glycerol on the mucosal surface of the inferior turbinate. RESULTS We observed that nasal mucosal water loss was increased by hypertonic saline and decreased by nasal cream and glycerol. CONCLUSION For the first time, we showed the human nasal mucosal water loss both in the basal state and after topical application of various substances.
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Affiliation(s)
- Masato Miwa
- Department of Otolaryngology, Koshigaya Hospital, Dokkyo University School of Medicine, Koshigaya, Saitama, Japan.
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Miwa M, Nakajima N, Hirose T, Iwasaki Y, Murakami A, Matsunaga M, Watanabe K. [Age distribution of transepithelial water loss in human nasal mucosa]. Arerugi 2006; 55:1337-9. [PMID: 17072114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/10/2006] [Accepted: 06/30/2006] [Indexed: 05/12/2023]
Abstract
BACKGROUND Dry nose is a common complaint in the elderly. Age distribution of transepithelial water loss of human nasal mucosa (TEWL) value was evaluated in this study. METHODS Eighty-eight volunteers (50 men and 30 women) ranging from 10 to 75 years old were recruited for this study. Measurement of TEWL was performed on the inferior nasal turbinate. TEWL was measured with an evaporation meter applying Fick's law (Tewameter TM 300; Courage and Khazaka, Cologne, Germany). RESULTS TEWL value tends to increase in order of age, indicating that the barrier function of epithelium may decline with age. CONCLUSION The measurement of transepithelial water loss should be contributed to assess the efficiency of nasal mucosal barrier disorders in the elderly.
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Affiliation(s)
- Masato Miwa
- Department of Otolaryngology, Koshigaya Hospital, Dokkyo Medical University.
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Kokeguchi S, Watanabe J, Matsunaga M, Goto S, Shiotani M. P-440. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Ohtaki H, Nakamachi T, Dohi K, Yofu S, Hodoyama K, Matsunaga M, Aruga T, Shioda S. Controlled normothermia during ischemia is important for the induction of neuronal cell death after global ischemia in mouse. Acta Neurochir Suppl 2006; 96:249-53. [PMID: 16671464 DOI: 10.1007/3-211-30714-1_53] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
A stable model of neuronal damage after ischemia is needed in mice to enable progression of transgenic strategies. We performed transient global ischemia induced by common carotid artery occlusions with and without maintaining normal rectal temperature (Trec) in order to determine the importance of body temperature control during ischemia. We measured brain temperature (Tb) during ischemia/reperfusion. Mice with normothermia (Trec within +/- 1 degrees C) had increased mortality and neuronal cell death in the CA1 region of hippocampus, which did not occur in hypothermic animals. If the Trec was kept within +/- 1 degrees C, the Tb decreased during ischemia. After reperfusion, Tb in the normothermia group developed hyperthermia, which reached > 40 degrees C and was > 2 degrees C higher than Trec. We suggest that tightly controlled normothermia and prevention of hypothermia (Trec) during ischemia are important factors in the development of a stable neuronal damage model in mice.
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Affiliation(s)
- H Ohtaki
- Department of Anatomy, Showa University School of Medicine, Tokyo, Japan.
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Satoh H, Terada H, Uehara A, Katoh H, Matsunaga M, Yamazaki K, Matoh F, Hayashi H. Post-challenge hyperinsulinaemia rather than hyperglycaemia is associated with the severity of coronary artery disease in patients without a previous diagnosis of diabetes mellitus. Heart 2005; 91:731-6. [PMID: 15894763 PMCID: PMC1768918 DOI: 10.1136/hrt.2003.032326] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/27/2004] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE To ascertain the prevalence of abnormal glucose metabolism in patients with coronary artery disease (CAD) but no previous diagnosis of diabetes mellitus (DM) and to examine the relation between the severity of CAD and responses of glucose and insulin to the glucose tolerance test. METHODS AND RESULTS Abnormalities of glucose metabolism and insulin response were analysed in 144 patients with CAD without a previous diagnosis of DM who underwent both coronary arteriography and 75 g oral glucose tolerance test. The proportions of impaired and diabetic glucose tolerance were very high (39% for impaired and 21% for diabetic glucose tolerance); only 40% had normal glucose tolerance. The parameters of glucose metabolism were not associated with the number of diseased coronary arteries or the presence of previous myocardial infarction (MI). However, the insulin concentration at 60 minutes or 120 minutes after glucose challenge, insulin area, and the ratio of insulin to glucose area were significantly higher in patients with significant coronary stenosis and with previous MI. Fasting glucose concentration and most conventional risk factors did not predict post-challenge hyperinsulinaemia. CONCLUSION Patients with CAD without a previous diagnosis of DM had a high prevalence of abnormal glucose tolerance. Post-challenge hyperinsulinaemia was associated with the number of diseased coronary arteries and the presence of previous MI. The insulin response to the glucose challenge test requires further investigation as a potential risk factor for CAD and a potential target for intervention.
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Affiliation(s)
- H Satoh
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine, Hamamatsu, Japan.
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Miwa M, Matsunaga M, Watanabe K. Effects of Dexamethasone on Chloride Channels of Human Nasal Epithelial Cells. Otolaryngol Head Neck Surg 2004. [DOI: 10.1016/j.otohns.2004.06.358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ohtaki H, Takaki A, Yin L, Dohi K, Nakamachi T, Matsunaga M, Horai R, Asano M, Iwakura Y, Shioda S. Suppression of oxidative stress after transient focal ischemia in interleukin-1 knock out mice. Acta Neurochir Suppl 2004; 86:191-4. [PMID: 14753433 DOI: 10.1007/978-3-7091-0651-8_41] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
Abstract
Interleukin-1 (IL-1) contributes to ischemic neurodegeneration. However, the mechanisms regulating action of IL-1 are still poorly understood. In order to clarify this central issue, mice that were gene deficient both IL-1alpha and beta (IL-1 KO) and wild-type mice were subjected to 1 hour transient middle cerebral artery occlusion (tMCAO). The concentration of 8-hydroxy deoxyguanosine (8OHdG) which is considered to be a reliable oxidative DNA damage by superoxide anion, in brain and of total nitric oxide (NO) in plasma were determined by use of HPLC. Twenty-four hours after tMCAO, the ratio of 8OHdG to dG in the ipsilateral hemisphere of wild-type mice were 2.24 x 10(-3) and 4.41 x 10(-3) in the neocortex and striatum, respectively. The concentration of 8OHdG in the ipsilateral hemisphere of the wild-type mice was higher than that of the IL-1 KO mice. The concentration of total NO in the plasma of IL-1 KO mice was also lower than that of the wild-type 24 hours after tMCAO. These results strongly suggest that IL-1 is participated in generating reactive oxygen spices and it aggravates and induces the ischemic neuronal cell death.(183 words).
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Affiliation(s)
- H Ohtaki
- Department of Anatomy, Showa University School of Medicine, Tokyo, Japan.
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Nitahara K, Matsunaga M, Katori K, Yotsui H, Higuchi H, Higa K. Effect of continuous low-dose intravenous diltiazem on epidural fentanyl analgesia after lower abdominal surgery. Br J Anaesth 2003; 90:507-9. [PMID: 12644426 DOI: 10.1093/bja/aeg095] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The postoperative opioid-sparing effects of systemic L-type calcium channel blockers are controversial. We investigated whether the postoperative analgesic effect of epidural fentanyl was enhanced by i.v. infusion of diltiazem at a rate that would minimize any cardiovascular depressant effect. METHODS After elective lower abdominal gynaecological surgery, 30 patients were randomized to receive continuous i.v. diltiazem 1 micro g kg(-1) min(-1) (diltiazem group) or the same volume of saline (control group) for 24 h. Cumulative postoperative epidural fentanyl consumption, visual analogue scale (VAS) scores and verbal rating scores (VRS) at rest and during mobilization, sedation scores, incidence of side-effects and overall patient satisfaction were assessed. RESULTS There was no significant difference in cumulative epidural fentanyl consumption between the groups at any period. Although there were no statistically significant differences in VAS scores, VRS, sedation scores, incidence of side-effects and overall patient satisfaction, there was a trend to an increased incidence of nausea in the diltiazem group. CONCLUSIONS Continuous i.v. infusion of diltiazem did not reduce epidural fentanyl consumption when administered at dosages having minimal haemodynamic depressant effects.
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Affiliation(s)
- K Nitahara
- Department of Anesthesiology, Fukuoka University School of Medicine, 7-45-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan.
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Matsunaga M, Abe T, Satoh N, Nakajima A, Ohkoshi M, Sakuragi S. Uveitopathogenic site of the gamma-subunit of cyclic guanosine monophosphate phosphodiesterase in Lewis rats. Jpn J Ophthalmol 2001; 45:570-6. [PMID: 11754897 DOI: 10.1016/s0021-5155(01)00411-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
PURPOSE The gamma-subunit of cyclic guanosine monophosphate phosphodiesterase (PDEgamma) plays an important role in the phototransduction process of rod photoreceptors. A previous report indicated that experimental autoimmune uveoretinitis (EAU) could be induced in Lewis rats by immunization with PDEgamma. In this study, we identified the uveitopathogenic site of PDEgamma synthetic peptides and identified pivotal amino acid residues using analogue peptides. METHODS Several synthetic peptides derived from PDEgamma plus adjuvants were injected in Lewis rats. The induction of EAU was examined clinically and histologically. In addition, humoral and cellular immunity against peptides was investigated. RESULTS The smallest uveitopathogenic peptide was identified as PDEgamma 64-76 (ITVICPWEAFNHL), which consists of 13 amino acid residues, and the core sequence was identified as PDEgamma 70-76 (WEAFNHL), which consists of 7 amino acid residues. The lowest dose of peptide to induce EAU was 0.03 nmol. The pivotal amino acid residues for eliciting EAU are at 70(W), 71(E), 73(F), and 75(H). CONCLUSION Our findings demonstrated the presence of a potent uveitopathogenic site in PDEgamma whose potency in Lewis rats was comparable to that of interphotoreceptor retinoid-binding protein.
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Affiliation(s)
- M Matsunaga
- Department of Ophthalmology, Akita University School of Medicine, Akita City, Japan
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Matsunaga M, Matsushima Y, Ohtani H, Tsuge S. Optimization of conditions for detailed compositional analysis of acrylic oligomers by supercritical fluid chromatography with temperature programming or modifier gradient technique. ANAL SCI 2001; 17:1295-9. [PMID: 11759512 DOI: 10.2116/analsci.17.1295] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Acrylic oligomers such as pentaerythritolacrylates (PEA), which are often utilized in the field of functionalized materials, generally consist of very complex homologous series. In this work, measuring conditions for packed-column supercritical fluid chromatographic separation of a complex PEA sample manufactured industrially were systematically examined using temperature programming or modifier gradient technique. Under the conditions thus optimized, not only the main components, PEA homologues containing different number of acryloyl groups, but also trace constituents such as their by-products formed through Michael addition reactions were favorably resolved on the resulting chromatograms. The fact that the coefficient of variation (CV) for relative intensity of each peak was approximately 3-6% even for the minor components suggested that detailed compositional analysis of PEAs could be performed precisely by the proposed method.
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Affiliation(s)
- M Matsunaga
- Toagosei Co., Ltd., Nagoya Research & Development Institute, 1-1 Funami-cho, Minato, Nagoya 455-0027, Japan
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Ozaki I, Yaegashi Y, Kimura T, Baba M, Matsunaga M, Hashimoto I. Dipole orientation differs between high frequency oscillations and N20m current sources in human somatosensory evoked magnetic fields to median nerve stimulation. Neurosci Lett 2001; 310:41-4. [PMID: 11524153 DOI: 10.1016/s0304-3940(01)02090-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The dipole orientation of equivalent current source for the high frequency oscillations (HFOs) above 300 Hz and that for the underlying N20m were compared. Somatic magnetic fields were recorded over the left hand somatosensory area to right median nerve stimulation at the wrist with a wide-bandpass (0.1-2000 Hz). The HFOs and underlying N20m were extracted by digital filtering of 300-900 Hz and 1-300 Hz, respectively. We found that the orientation of the HFOs and underlying N20m current sources differs and that the HFO source orientation shows a more divergent pattern than the N20m. These results suggest that the somatosensory HFOs are not generated from the pyramidal cell population in area 3b which produces the underlying N20m and that they may reflect activities of the non-pyramidal neuron population.
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Affiliation(s)
- I Ozaki
- Department of Physical Therapy, Faculty of Health Science, Aomori University of Health and Welfare, 58-1 Mase, Hamadate, Aomori 030-8505, Japan.
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Tomiyama M, Kimura T, Maeda T, Tanaka H, Furusawa K, Kurahashi K, Matsunaga M. Expression of metabotropic glutamate receptor mRNAs in the human spinal cord: implications for selective vulnerability of spinal motor neurons in amyotrophic lateral sclerosis. J Neurol Sci 2001; 189:65-9. [PMID: 11535235 DOI: 10.1016/s0022-510x(01)00561-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To elucidate the relevance of metabotropic glutamate receptors (mGluRs) to the selective vulnerability of motor neurons in the spinal cord in patients with amyotrophic lateral sclerosis (ALS), we investigated the distribution of mRNAs coding mGluR1-5 in the normal human spinal cord. The mRNAs for mGluR1, 4 and 5 were observed in the spinal gray matter, whereas mGluR2 mRNA was absent in the spinal cord and mGluR3 mRNA was displayed only on glial cells in the white matter. Signals for mGluR1 and mGluR5 were enriched in the dorsal horn, while mGluR4 mRNA was abundant in the ventral horn. Since agonists to group I mGluRs (mGluR 1 and 5) have been demonstrated to have neuroprotective effects on spinal motor neurons, less expression of mRNAs coding mGluR1 and mGluR5 in the ventral horn than in the dorsal horn may be implicated in the selective susceptibility of spinal motor neurons in ALS.
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Affiliation(s)
- M Tomiyama
- Department of Neurological Science, Institute of Brain Science, Hirosaki University School of Medicine, Zaifu-cho 5, Hirosaki 036-8562, Japan.
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