47 results on '"Hiraoka R"'
Search Results
2. P2.13-04 Pathological Images Machine Learning Predicts Long Term Effects for Immunotherapy in Small-Cell Lung Cancer
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Shibaki, R., Fujimoto, D., Nozawa, T., Hara, S., Uchida, J., Miyauchi, E., Hiraoka, R., Daga, H., Masuda, T., Tanaka, S., Ikeda, S., Saito, G., Suzuki, H., Sakata, S., Sakata, Y., Yamamoto, N., Koh, Y., and Akamatsu, H.
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- 2023
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3. Baseline functioning and stress reactivity in maltreating parents and at-risk adults: Review and meta-analyses of autonomic nervous system studies
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Reijman, S., Bakermans-Kranenburg, M.J., Hiraoka, R., Crouch, J.L., Milner, J.S., Alink, L.R.A., and IJzendoorn, M.H. van
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meta-analysis ,stress ,autonomic nervous system ,review ,child maltreatment - Published
- 2016
4. Nanogap-controllable self-assembly of gold nanoparticles using nanotrench template.
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Sugano, K., Hiraoka, R., Tsuchiya, T., Tabata, O., Klaumunzer, M., Voigt, M., and Peukert, W.
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- 2011
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5. Craving among polysubstance using adolescents.
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Florsheim P, Shiozaki T, Hiraoka R, Tiffany ST, Heavin S, Hall S, Teske N, and Clegg C
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The phenomenon of drug craving among adolescents with substance use disorders has been largely overlooked by addiction researchers. This study was designed to: (1) assess craving among adolescents with polysubstance use disorders (SUDs); and (2) examine the association between personality traits and craving among adolescents with SUDs. Craving was found to be amultidimensional phenomenon that demonstrated some degree of consistency across substances (in this case, marijuana and alcohol). Selected personality traits were associated with distinct components of craving; for example, adolescent substance users who obtained high sensation-seeking scores tended to crave the excitement associated with drug use. Adolescents who obtained high anxious-neuroticism scores tended to crave the experience of distress relief associated with drug use [ABSTRACT FROM AUTHOR]
- Published
- 2008
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6. Airway responsiveness to beta-agonist and beta2-adrenoceptor gene polymorphisms
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Asano, K., Suzuki, Y., Shiomi, T., Nakajima, T., Kudoh, H., Matsuzaki, T., Yamada, W., Hiraoka, R., Yamaguchi, K., Nagabukuro, A., and Harada, Y.
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- 2003
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7. Single-molecule quantum dot as a Kondo simulator.
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Hiraoka, R., Minamitani, E., Arafune, R., Tsukahara, N., Watanabe, S., Kawai, M., and Takagi, N.
- Abstract
Structural flexibility of molecule-based systems is key to realizing the novel functionalities. Tuning the structure in the atomic scale enables us to manipulate the quantum state in the molecule-based system. Here we present the reversible Hamiltonian manipulation in a single-molecule quantum dot consisting of an iron phthalocyanine molecule attached to an Au electrode and a scanning tunnelling microscope tip. We precisely controlled the position of Fe
2+ ion in the molecular cage by using the tip, and tuned the Kondo coupling between the molecular spins and the Au electrode. Then, we realized the crossover between the strong-coupling Kondo regime and the weak-coupling regime governed by spin-orbit interaction in the molecule. The results open an avenue to simulate low-energy quantum many-body physics and quantum phase transition through the molecular flexibility. [ABSTRACT FROM AUTHOR]- Published
- 2017
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8. Stability of liquid CO 2 spheres covered with clathrate film when exposed to environment simulating the deep sea
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Nishikawa, N., Ishibashi, M., Ohta, H., Akutsu, N., Tajika, M., Sugitani, T., Hiraoka, R., Kimuro, H., and Shiota, T.
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- 1995
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9. ChemInform Abstract: Photochemical Reactions of 9-(ω-Anilinoalkyl)-10- bromophenanthrenes.
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SUGIMOTO, A., HIRAOKA, R., FUKADA, N., KOSAKA, H., and INOUE, H.
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- 1993
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10. Nursing students' self-assessed level of nursing skills at the time of graduation in a Japanese University: A retrospective observational study.
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Notsu M, Naito T, Notsu A, Saito A, Hiraoka R, Suzuki E, Takano S, Yoda M, Takakuwa Y, Yokoyama E, and Sakai T
- Abstract
Objective: This study aimed to clarify nursing students' self-assessed levels of nursing skills at a nursing university at graduation and discuss how education and clinical experiences for students and post-licensure nurses should be improved, especially focusing on oncology nursing., Methods: The study population comprised fourth-year students from 2017 to 2019 at the Faculty of Health Science and Nursing, Juntendo University, who had completed all stipulated clinical placements. The Japanese government determined 141 nursing skills and their target levels. Students subjectively evaluated their achieved levels for the 141 nursing skills after the final clinical placement., Results: Of the 141 nursing skills, 81 (57%) were rated as "skills with easy-to-achieve targets" and five were rated as "skills with difficult-to-achieve targets." All nursing skills in the two subcategories of environmental adjustment skills and comfort management skills were rated as "skills with easy-to-achieve targets." Nursing skills with low target achievement rates were for patients with oral intake difficulties, unstable respiratory status, and those requiring glycemic control. These skills are also important in oncology nursing., Conclusions: It cannot be concluded that the nursing university students fully achieved the target levels of nursing skills, as determined by the Japanese government. These findings may facilitate discussions on teaching nursing skills and their target levels at the time of graduation from nursing universities or post-employment., (© 2024 The Author(s).)
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- 2024
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11. Multifocal Contact Lenses and 0.01% Atropine Eye Drops for Myopia Control Study: Research Protocol for a 1-Year, Randomized, Four-Arm, Clinical Trial in Schoolchildren.
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Hiraoka T, Kiuchi G, Hiraoka R, Maruo K, and Oshika T
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- Child, Humans, Atropine therapeutic use, Ophthalmic Solutions therapeutic use, Prospective Studies, Refraction, Ocular, Axial Length, Eye, Disease Progression, Randomized Controlled Trials as Topic, Myopia drug therapy, Myopia prevention & control, Contact Lenses
- Abstract
Objectives: Previous studies have shown that combined use of orthokeratology and 0.01% atropine (AT) eye drops can strongly prevent axial elongation in myopic children. However, the efficacy of combined use with multifocal contact lens (MFCL) and 0.01% AT remains unclear. The aim of this trial is to clarify the efficacy of MFCL+0.01% AT combination therapy for myopia control and safety., Methods: This prospective study is a randomized, double-masked, placebo-controlled trial with four arms. A total of 240 children aged 6 to 12 years with myopia is recruited and randomly assigned to one of the four groups in a ratio of 1:1:1:1 as follows: group 1: MFCL+AT combination therapy, group 2: MFCL monotherapy, group 3: AT monotherapy, and group 4: placebo. The participants will continue the assigned treatment for 1 year. The primary and secondary outcomes are the comparisons of axial elongation and myopia progression in the four groups during the 1-year study period., Discussion: The present trial would determine whether the MFCL+AT combination therapy is more effective in slowing axial elongation and myopia progression in schoolchildren as compared with each monotherapy or placebo, and it also confirm acceptable safety of the combination therapy., Competing Interests: The authors have no conflicts of interest to disclose., (Copyright © 2023 Contact Lens Association of Ophthalmologists.)
- Published
- 2023
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12. Precut technique using an injection needle: A retrospective study on a new ancillary procedure for pleural biopsy.
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Mizumori Y, Hirano K, Hirata N, Hiraoka R, Takahashi S, Kominami R, Miyake K, Takenouchi M, Kato T, Kume S, Higashino S, Nakahara Y, and Kawamura T
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- Aged, Biopsy methods, Female, Humans, Male, Pleura pathology, Retrospective Studies, Thoracoscopy methods, Pleural Diseases diagnosis, Pleural Effusion etiology
- Abstract
The effectiveness of thoracoscopic biopsy as a diagnostic method for pleural diseases has been reported; however, obtaining a sufficient specimen size is sometimes difficult. Therefore, an ancillary technique, the precut technique using an injection needle, was devised to address this problem. This study aimed to evaluate the effectiveness and safety of the novel precut technique in patients with undiagnosed pleural effusion. This retrospective study included 22 patients who underwent pleural biopsy using the precut technique to examine exudative pleural effusion of unknown etiology. Thoracoscopy was performed under local anesthesia. The biopsy procedure was performed as follows: a needle was inserted into the pleura around the lesion using a semiflexible thoracoscope; the needle was positioned to make an incision in the pleura while injecting 1% lidocaine with epinephrine and lifting the pleura from the fascia; 2 or 3 precut incision lines were arranged in a triangle; and the specimen was obtained from the parietal pleura using forceps or a cryoprobe. Patient data including age, number of biopsies, biopsy specimen size, pathological and final diagnosis, and postoperative complications were examined. All patients were male with an average age of 74 years. Pleural effusion was found on the right and left sides in 16 and 6 patients, respectively. The average major axis of the biopsy specimens was 18 mm (range, 10-30 mm), which was sufficient to establish a pathological diagnosis. Only 1 patient experienced minor temporal bleeding as a complication. The precut technique enabled the procurement of specimens sufficient in size for pleural biopsy., Competing Interests: The authors have no funding and conflicts of interest to disclose., (Copyright © 2022 the Author(s). Published by Wolters Kluwer Health, Inc.)
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- 2022
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13. Clinical performance of a custom-designed soft contact lens in patients with keratoconus and intolerance to rigid contact lenses.
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Hiraoka T, Kiuchi G, Hiraoka R, and Oshika T
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- Adult, Corneal Topography, Female, Humans, Male, Retrospective Studies, Visual Acuity, Young Adult, Contact Lenses, Hydrophilic, Keratoconus complications, Keratoconus diagnosis, Keratoconus therapy, Refractive Errors complications
- Abstract
Purpose: This study evaluated the efficacy and safety of YOUSOFT
® soft contact lens (CL) (TOMEY-CL) in patients with keratoconus and intolerance to rigid CLs., Study Design: Retrospective observational study., Methods: Thirty-six eyes of 20 patients (14 men and 6 women) with keratoconus and rigid CL intolerance were included in the study. Four patients were unilateral. The mean age was 33.1 ± 11.7 (± standard deviation) years, the mean spherical refractive error was - 4.99 ± 3.97 D, and the mean cylindrical refractive error was - 3.39 ± 2.13 D. The following examinations were performed at baseline and were repeated at every visit; refractometry, visual acuity, corneal topography and pachymetry with an anterior OCT system. Corneal endothelial cell density was evaluated at baseline and every 6 months. Slit-lamp examination was also performed to confirm the CL condition and ocular health at every visit., Results: Seventeen patients (85%) were able to continue using the Yousoft. Among 3 patients (15%) who dropped out, 2 were dissatisfied with their visual outcomes and one had trouble with lens handling. Uncorrected visual acuity was 1.08 ± 0.43 (range: 0.22 to 2.00) logMAR at baseline, and best CL-corrected visual acuity was 0.01 ± 0.15 (range: - 0.18 to 0.40) logMAR, showing a significant improvement after wearing Yousoft (P < 0.0001). The endothelial cell density did not change significantly, with 2373 ± 482 at baseline and 2402 ± 464 cells/mm2 at the latest visit after lens prescription (P = 0.351). There were no severe complications such as corneal infiltrates or infectious keratitis throughout the study period., Conclusions: This study showed the efficacy and acceptable safety of Yousoft for patients with keratoconus and intolerance to rigid CLs., (© 2022. Japanese Ophthalmological Society.)- Published
- 2022
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14. Histologic transformation of epidermal growth factor receptor-mutated lung cancer.
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Fujimoto D, Akamatsu H, Morimoto T, Wakuda K, Sato Y, Kawa Y, Yokoyama T, Tamiya M, Hiraoka R, Shingu N, Ikeda H, Tamiya A, Kanazu M, Miyauchi E, Miura S, Yanai M, Yomota M, Morinaga R, Yokoi T, Hata A, Suzuki H, Matsumoto H, Sakata S, Furuya N, Harutani Y, Nakachi I, Otsuki A, Uematsu S, Hara S, Yokoo K, Sugimoto T, and Yamamoto N
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- ErbB Receptors, Humans, Immune Checkpoint Inhibitors, Mutation, Protein Kinase Inhibitors, Retrospective Studies, Carcinoma, Non-Small-Cell Lung drug therapy, Carcinoma, Non-Small-Cell Lung genetics, Lung Neoplasms drug therapy, Lung Neoplasms genetics
- Abstract
Purpose: This study aimed to determine the incidence and clinical course of epidermal growth factor receptor (EGFR)-mutated lung cancer with histologic transformation (HT)., Patients and Methods: We conducted a multicentre, retrospective, cohort study of patients with advanced EGFR-mutated lung cancer who received EGFR-tyrosine kinase inhibitors (TKIs) between 2012 and 2019. The primary outcome was the incidence of HT. The secondary outcome was treatment efficacy in patients with HT., Results: In total, 6356 patients were enrolled. In 2624 patients, the histological type was proven by rebiopsy after acquiring resistance to EGFR-TKIs. Among them, 74 patients had HT (incidence rate: 2.8% [95% confidence interval: 2.3%-3.5%]). The median progression-free survival after EGFR-TKIs and first-line therapy after confirming HT was 10.4 and 4.4 months, respectively, which was not significantly different between patients with transformation to high-grade neuroendocrine carcinoma and those with transformation to another subtype of non-small cell lung cancer. Overall survival after confirming HT was 12.2 months. Twenty-seven patients received immune checkpoint inhibitors: 6 and 21 received immune checkpoint inhibitors before and after confirming HT, respectively. No patients achieved 1-year progression-free survival. The median progression-free survival after immune checkpoint inhibitor therapy after confirming HT was 1.6 months., Conclusion: HT occurred in approximately 3% of EGFR-mutated patients who developed resistance to EGFR-TKIs. Cytotoxic agents are likely to be effective in patients with HT. However, the therapeutic effectiveness of immune checkpoint inhibitors was limited in these patients. Given the rarity of HT and absence of prospective trials, our findings are important to inform the treatment of these patients., (Copyright © 2022 Elsevier Ltd. All rights reserved.)
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- 2022
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15. Traffic light type paper-based analytical device for intuitive and semi-quantitative naked-eye signal readout.
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Ohta S, Hiraoka R, Hiruta Y, and Citterio D
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- Hydrogen Peroxide, Lab-On-A-Chip Devices, Point-of-Care Testing, Microfluidic Analytical Techniques, Paper
- Abstract
Microfluidic paper-based analytical devices (μPADs) have attracted great attention as potential candidates for point-of-care testing (POCT). Nevertheless, only a limited number of μPADs expected to satisfy the standard of Clinical Laboratory Improvement Amendments (CLIA) waived tests as issued by the US Food and Drug Administration (FDA) have been reported. This work introduces a "traffic light type μPAD", enabling highly intuitive semi-quantitative equipment-free naked-eye readout with no need for calibration, subjective interpretation or calculation. Assay results are displayed as traffic light colours reporting 5 analyte concentration levels (green/green & yellow/yellow/yellow & red/red). The device has been designed to never display all three colours simultaneously, eliminating any risk for misinterpretation. The mechanism relies on the modulation of sample flow through a network of paperfluidic channels modified with a hydrophobic to hydrophilic phase-switching substance responsive to H
2 O2 . User operation is limited to sample application, followed by observing a clear and time-independent traffic light signal after approximately 10-30 min. Multiple factors influencing the H2 O2 concentration-dependent appearance of a specific traffic light signal were studied. Making use of the possibilities for customising the concentration threshold levels for traffic light colour appearance, quantification of glucose at 5 levels in a clinically relevant concentration range was demonstrated in artificial urine as a model proof-of-concept. This platform is expected to offer the possibility for the future detection of other important metabolites.- Published
- 2022
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16. Comparison of visual performance between extended depth of focus contact lens and single-vision contact lens in eyes with monofocal intraocular lens.
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Hiraoka T, Kiuchi G, Hiraoka R, Kotsuka J, Kinoshita Y, and Oshika T
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- Contrast Sensitivity, Cross-Over Studies, Humans, Lens Implantation, Intraocular, Prospective Studies, Prosthesis Design, Visual Acuity, Contact Lenses, Lenses, Intraocular, Phacoemulsification
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Purpose: To assess the visual performance of extended depth of focus (EDF) contact lenses (CL) in eyes that had undergone monofocal intraocular lens (IOL) implantation, and compare that between EDF and single-vision (SV) contact lenses., Study Design: Prospective, randomized, crossover study METHODS: Seventeen patients implanted with monofocal IOLs were enrolled. The study was conducted using 1dayPure EDOF as a test CL and 1dayPure moisture (both SEED Co., Ltd.) as a control CL. Binocular visual acuity from far to near distances, photopic and mesopic contrast sensitivity (with and without glare), and stereopsis were evaluated after wearing the two kinds of CLs in random order. The obtained results were compared between the EDF and SV CLs., Results: Binocular visual acuity at 0.3, 0.4, 0.7, 1, and 5 m was 0.24 ± 0.12, 0.07 ± 0.09, - 0.02 ± 0.08, - 0.02 ± 0.08, and - 0.06 ± 0.07 logMAR during the EDF CL wear, respectively, and 0.39 ± 0.17, 0.26 ± 0.15, 0.04 ± 0.12, - 0.02 ± 0.08, and - 0.09 ± 0.09 during the SV CL wear, respectively. The EDF CL showed better results than the SV CL at 0.3, 0.4, and 0.7 m (p < 0.05). There were no significant differences in contrast sensitivity between the EDF and SV CLs at 1.5 cycles per degree under all conditions; however, the sensitivity of the EDF CL was generally worse than that of the SV CL from the middle to high spatial frequencies. Stereopsis at 40 cm was significantly better in the EDF CL wear than in the SV CL wear (p < 0.05)., Conclusions: The EDF CL substantially improved visual acuity at near to intermediate distances in IOL-implanted eyes. However, far visual acuity decreased under low-contrast conditions, and contrast sensitivity slightly declined at the middle to high spatial frequencies., (© 2021. Japanese Ophthalmological Society.)
- Published
- 2021
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17. Perceived Executive Functioning in Parents at Risk for Child Physical Abuse.
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Crouch JL, Davila AL, Holzman JB, Hiraoka R, Rutledge E, Bridgett DJ, Milner JS, and Skowronski JJ
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- Adult, Child, Executive Function, Humans, Parenting, Parents, Child Abuse, Physical Abuse
- Abstract
Research suggests that deficits in executive functioning are associated with negative parenting behaviors. However, limited research has examined the link between executive functioning and risk for child physical abuse (CPA) perpetration. Early studies examining executive functioning in parents at risk for perpetrating CPA relied on performance-based measures, which are designed to occur under carefully controlled conditions and may not capture difficulties experienced under less optimal conditions (e.g., during chaotic caregiving situations). Moreover, prior studies examining executive functioning in parents at risk for perpetrating CPA have relied on small samples comprised of only mothers. To advance our understanding of the linkage between executive functioning and CPA risk, the present study examined perceived deficits in executive functioning in a sample of general population mothers and fathers ( N = 98) using a standardized self-report measure of executive functioning, namely, the adult version of the Behavior Rating Inventory of Executive Function (BRIEF-A). Parents were classified as low CPA risk or high CPA risk using the Child Abuse Potential Inventory. Compared with low-risk parents, high-risk parents had higher rates of clinical elevations on several BRIEF-A subscales, namely, Working Memory Problems, Emotional Control Difficulties, and Difficulties Shifting Thoughts, Feelings, and Behaviors. These findings highlight the potential importance of assessing and strengthening executive functioning in interventions designed to reduce risk of parent-to-child aggression.
- Published
- 2021
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18. Synthesis of (12R,13S)-pyriculariol and (12R,13S)-dihydropyriculariol revealed that the rice blast fungus, Pyricularia oryzae, produces these phytotoxins as racemates.
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Nagashima Y, Sasaki A, Hiraoka R, Onoda Y, Tanaka K, Wang ZY, Kuwana A, Sato Y, Suzuki Y, Izumi M, Kuwahara S, Nukina M, and Kiyota H
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- Ascomycota physiology, Mycotoxins toxicity, Oryza drug effects, Oryza growth & development, Stereoisomerism, Ascomycota metabolism, Mycotoxins biosynthesis, Mycotoxins chemistry, Oryza microbiology
- Abstract
Synthesis of assumed natural (12R,13S)-enantiomers of pyriculariol (1) and dihydropyriculariol (2), phytotoxins isolated from rice blast disease fungus, Pyricularia oryzae, was achieved using Wittig reaction or microwave-assisted Stille coupling reaction as the key step. The synthesis revealed that the natural 1 and 2 are racemates. Foliar application test on a rice leaf indicated that both the salicylaldehyde core and side chain were necessary for phytotoxic activity. The fungus is found to produce optically active phytotoxins when incubated with rotary shaker, but racemic ones when cultured using an aerated jar fermenter., (© The Author(s) 2021. Published by Oxford University Press on behalf of Japan Society for Bioscience, Biotechnology, and Agrochemistry.)
- Published
- 2021
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19. Paper-Based Device for Naked Eye Urinary Albumin/Creatinine Ratio Evaluation.
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Hiraoka R, Kuwahara K, Wen YC, Yen TH, Hiruta Y, Cheng CM, and Citterio D
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- Humans, Albumins chemistry, Creatinine urine, Microfluidic Analytical Techniques methods, Urinalysis methods
- Abstract
This paper introduces the concept of "Drawing-PADs" (Drawing paper-based microfluidic analytical devices) allowing to intuitively evaluate the urinary albumin (Alb) index, a clinically important parameter used for the early detection of renal deficiencies related to diabetes, among others. To enable regular monitoring of the Alb index, a simple examination method suitable for self-diagnosis is highly desirable. The Drawing-PADs rely on the simultaneous naked eye detection of Alb and creatinine (Cre) on a single device according to the distance-based microfluidic PAD (μPAD) approach. The Alb index is visualized by simply drawing a straight line connecting the top of two color-changed assay channel sections (Alb and Cre channels), followed by visually confirming the position of the intercept of the drawn straight line. The semiquantitative Alb index evaluation performed with Drawing-PADs does not require any equipment such as a camera, software, or a color reference chart. The obtained results are independent of the sample volume and are not influenced by changes in the absolute Alb and Cre concentrations caused by urine excretion variations, making spot urine assays possible. Classification of Alb index values according to clinically relevant criteria (normoalbuminuria, microalbuminuria, and macroalbuminuria) is readily achieved within 15 min and has been validated for 15 human urine samples including diabetic patients and healthy volunteers.
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- 2020
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20. Toward Easy and Rapid Bronchial Occlusion With an Endobronchial Watanabe Spigot: A New Technique Using a Guide Sheath and Curette.
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Mizumori Y, Nakahara Y, Hirata N, Hiraoka R, Kominami R, Hirano K, Hanaoka K, Katsuda R, Miyake K, and Kawamura T
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- Aged, Aged, 80 and over, Bronchial Fistula etiology, Equipment Design, Female, Humans, Male, Middle Aged, Operative Time, Pleural Diseases complications, Pneumothorax diagnostic imaging, Pneumothorax etiology, Postoperative Complications epidemiology, Surgical Instruments standards, Treatment Outcome, Bronchial Diseases pathology, Bronchial Fistula therapy, Bronchoscopy methods, Embolization, Therapeutic instrumentation, Hemoptysis therapy
- Abstract
Background: Bronchial occlusion using an endobronchial Watanabe spigot (EWS) is reportedly effective for intractable bronchopleural fistula. Here, we describe a rapid and easy method for bronchial occlusion using a guide sheath (GS) and curette., Methods: Thirty consecutive patients who underwent bronchial occlusion under mild sedation between October 2014 and February 2018 were enrolled. The devices used were a flexible bronchoscope (BF-1T260 or BF-1TQ290), GS (SG-201C; with 30 mm of the proximal end cutaway), and a CC-4CR-1 curette (all supplied by Olympus Ltd). The curette was inserted into the GS with the tip of the curette exposed outside the GS. The curette and GS were inserted into the bronchoscope. The EWS attached to the curette tip was inserted into the target bronchus and left in position by pulling the curette back through the GS while pushing the EWS with the GS under the bronchoscopic view. The success rate and procedure time were recorded., Results: Bronchial occlusion with an EWS was performed on 143 target bronchi (2 to 9 bronchi/patient). The bronchial occlusion success rate was 98.6%. The median procedure time for bronchial occlusion per EWS on video recordings of the 10 most recent procedures was 110 (range, 40 to 521) seconds. The target bronchial occlusion success rate was 100%. This method enabled easy insertion of the EWS, even in the sharply branching upper lobe bronchus. No complications were observed., Conclusion: Bronchial occlusion using a GS and curette is a rapid and easy technique even in a sharply branching target bronchus.
- Published
- 2020
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21. Do emotion regulation difficulties explain the association between executive functions and child physical abuse risk?
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Crouch JL, McKay ER, Lelakowska G, Hiraoka R, Rutledge E, Bridgett DJ, and Milner JS
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- Adult, Child, Cross-Sectional Studies, Female, Humans, Male, Self Report, Surveys and Questionnaires, Child Abuse psychology, Emotions, Executive Function, Parents psychology, Physical Abuse psychology
- Abstract
This study examined the associations between executive functioning problems, emotion regulation difficulties, and risk for perpetrating child physical abuse (CPA). It was hypothesized that: (a) poor executive functions (i.e., working memory problems and inhibition/switching problems) would be associated with higher levels of emotion regulation difficulties and CPA risk; (b) emotion regulation difficulties would be positively associated with CPA risk; and (c) emotion regulation difficulties would partially explain the association between executive functions (i.e., working memory problems and inhibition/switching problems) and CPA risk. To examine these predictions, a sample of 133 general population parents (31% fathers) completed self-report measures of CPA risk, emotion regulation difficulties, working memory problems, and a performance-based measure of inhibition/switching skills. Results revealed that executive functioning problems were linked with emotion regulation difficulties, which in turn were associated with CPA risk. Moreover, emotion regulation difficulties explained the relationship between executive functions (working memory, inhibition/switching) and CPA risk. The final model accounted for 41% of the variance in CPA risk. Although additional research is needed, the present findings suggest that enhancing parents' executive functioning and teaching them effective emotion regulation skills may be important targets for CPA prevention efforts., (Copyright © 2018 Elsevier Ltd. All rights reserved.)
- Published
- 2018
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22. A Pilot Study of a 4-Week eHealth-Based Protocol of the Attention Training Technique Component of Metacognitive Therapy Among Patients With Anxiety Disorders.
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Fergus TA and Hiraoka R
- Abstract
The attention training technique (ATT) component of metacognitive therapy seeks to reduce anxiety and strengthen executive attention. ATT has the potential to expand mental health service delivery, with researchers labeling ATT as a possible form of eHealth. However, the only known published study to examine ATT in that delivery capacity was not supportive of its use. The current pilot study examined a new 4-week eHealth-based protocol of ATT among a small mixed sample of patients with anxiety disorders ( N = 16). Patients attended a single in-person session to practice ATT and then practiced ATT remotely by accessing a standardized recording of ATT through the Internet for 4 weeks. There was no attrition and over 80% of patients achieved the practice benchmark. Improvements were noted across clinician-rated, patient-rated, and performance-based outcomes. Results support further examination of ATT as a possible eHealth treatment for anxiety disorders. Recommendations for future research are discussed., (© 2018 Springer Publishing Company, LLC.)
- Published
- 2018
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23. Heart Rate and Heart Rate Variability in Parents at Risk for Child Physical Abuse.
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Crouch JL, Hiraoka R, McCanne TR, Reo G, Wagner MF, Krauss A, Milner JS, and Skowronski JJ
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The present study examined heart rate and heart rate variability (i.e., respiratory sinus arrhythmia [RSA]) in a sample of 48 general population parents (41.7% fathers), who were either at high risk ( n = 24) or low risk ( n = 24) for child physical abuse. During baseline assessments of heart rate and RSA, parents sat quietly for 3 min. Afterward, parents were presented with a series of anagrams (either easy or difficult) and were instructed to solve as many anagrams as possible in 3 min. As expected, high-risk (compared with low-risk) parents evinced significantly higher resting heart rate and significantly lower resting RSA. During the anagram task, high-risk parents did not evince significant changes in heart rate or RSA relative to baseline levels. In contrast, low-risk parents evinced significant increases in heart rate and significant decreases in RSA during the anagram task. Contrary to expectations, the anagram task difficulty did not moderate the study findings. Collectively, this pattern of results is consistent with the notion that high-risk parents have chronically higher levels of physiological arousal relative to low-risk parents and exhibit less physiological flexibility in response to environmental demands. High-risk parents may benefit from interventions that include components that reduce physiological arousal and increase the capacity to regulate arousal effectively.
- Published
- 2018
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24. Transport characteristics of a silicene nanoribbon on Ag(110).
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Hiraoka R, Lin CL, Nakamura K, Nagao R, Kawai M, Arafune R, and Takagi N
- Abstract
We present the transport characteristics of individual silicene nanoribbons (SiNRs) grown on Ag(110). By lifting up a single SiNR with a low-temperature scanning tunneling microscope tip, a nanojunction consisting of tip, SiNR and Ag is fabricated. In the differential conductance spectra of the nanojunctions fabricated by this methodology, a peak appears at the Fermi level which is not observed in the spectra measured either for the SiNRs before being lifted up or the clean Ag substrate. We discuss the origin of the peak as it relates to the SiNR.
- Published
- 2017
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25. Factors associated with the relapse of cryptogenic and secondary organizing pneumonia.
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Onishi Y, Kawamura T, Nakahara Y, Kagami R, Sasaki S, Takahashi S, Kominami R, Hirano K, Hiraoka R, and Hirata N
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- Adrenal Cortex Hormones therapeutic use, Aged, Aged, 80 and over, Bronchoalveolar Lavage Fluid cytology, Female, Forecasting, Humans, Leukocyte Count, Lung metabolism, Male, Middle Aged, Recurrence, Retrospective Studies, Cryptogenic Organizing Pneumonia classification, Cryptogenic Organizing Pneumonia diagnosis, Cryptogenic Organizing Pneumonia drug therapy, Cryptogenic Organizing Pneumonia metabolism, Fibrin metabolism, Neutrophils
- Abstract
Background: Organizing pneumonia (OP) is a histopathological response pattern to lung inflammation. It is clinically classified into cryptogenic OP and secondary OP, which is associated with various clinical conditions. Rapid resolution with corticosteroids and frequent relapses are common in OP. However, few studies have investigated the factors associated with OP relapse., Methods: The medical records of 75 patients with biopsy-proven OP, diagnosed between January 2010 and August 2015, who underwent corticosteroid therapy were retrospectively reviewed. Initially, the patients were all treated successfully; however, 31 patients experienced relapse thereafter (R group), whereas the others did not (NR group; 44 patients). The clinical, radiological, and pathological characteristics and administered corticosteroid doses were compared between the two groups., Results: The neutrophil percentage in the bronchoalveolar lavage (BAL) fluid and the level of fibrin deposition in lung biopsy specimens were higher in the R group than in the NR group (P=0.01 and P=0.002, respectively). The multivariate analysis demonstrated that both factors were statistically significant predictors of OP relapse., Conclusions: A high neutrophil percentage in the BAL and the level of fibrin deposition in lung biopsy specimens are considered predictive factors of OP relapse during the tapering or after the cessation of steroid therapy. Patients without these findings may be treated with low-dose corticosteroids., (Copyright © 2016 The Japanese Respiratory Society. Published by Elsevier B.V. All rights reserved.)
- Published
- 2017
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26. Baseline Functioning and Stress Reactivity in Maltreating Parents and At-Risk Adults: Review and Meta-Analyses of Autonomic Nervous System Studies.
- Author
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Reijman S, Bakermans-Kranenburg MJ, Hiraoka R, Crouch JL, Milner JS, Alink LRA, and van IJzendoorn MH
- Abstract
We reviewed and meta-analyzed 10 studies ( N = 492) that examined the association between (risk for) child maltreatment perpetration and basal autonomic activity, and 10 studies ( N = 471) that examined the association between (risk for) child maltreatment and autonomic stress reactivity. We hypothesized that maltreating parents/at-risk adults would show higher basal levels of heart rate (HR) and skin conductance (SC) and lower levels of HR variability (HRV) and would show greater HR and SC stress reactivity, but blunted HRV reactivity. A narrative review showed that evidence from significance testing within and across studies was mixed. The first set of meta-analyses revealed that (risk for) child maltreatment was associated with higher HR baseline activity ( g = 0.24), a possible indication of allostatic load. The second set of meta-analyses yielded no differences in autonomic stress reactivity between maltreating/at-risk participants and nonmaltreating/low-risk comparison groups. Cumulative meta-analyses showed that positive effects for sympathetic stress reactivity as a risk factor for child maltreatment were found in a few early studies, whereas each subsequently aggregated study reduced the combined effect size to a null effect, an indication of the winner's curse. Most studies were underpowered. Future directions for research are suggested.
- Published
- 2016
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27. Borderline personality features and emotion regulation deficits are associated with child physical abuse potential.
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Hiraoka R, Crouch JL, Reo G, Wagner MF, Milner JS, and Skowronski JJ
- Subjects
- Adult, Analysis of Variance, Child, Fathers psychology, Female, Humans, Male, Mothers psychology, Parenting psychology, Personality Inventory, Physical Abuse psychology, Borderline Personality Disorder psychology, Child Abuse psychology, Emotions
- Abstract
The present study extends prior research examining the association between borderline personality disorder (BPD) features and child physical abuse (CPA) risk. We hypothesized that: (1) high CPA risk parents (compared to low CPA risk parents) would more often report clinically elevated levels of BPD features; (2) high CPA risk parents with elevated BPD features would represent a particularly high-risk subgroup; and (3) the association between elevated BPD features and CPA risk would be partially explained by emotion regulation difficulties. General population parents (N=106; 41.5% fathers) completed self-report measures of BPD features, CPA risk, and emotion regulation difficulties. Results support the prediction that BPD features are more prevalent among high (compared to low) CPA risk parents. Among the parents classified as high CPA risk (n=45), one out of three (33.3%) had elevated BPD features. In contrast, none of the 61 low CPA risk parents reported elevated BPD symptoms. Moreover, 100% of the parents with elevated BPD features (n=15) were classified as high-risk for CPA. As expected, high CPA risk parents with elevated BPD features (compared to high CPA risk parents with low BPD features) obtained significantly higher scores on several Child Abuse Potential Inventory scales, including the overall abuse scale (d=1.03). As predicted, emotion regulation difficulties partially explained the association between BPD features and CPA risk. Findings from the present study suggest that a subset of high CPA risk parents in the general population possess clinically significant levels of BPD symptoms and these parents represent an especially high-risk subgroup. Interventions designed to address BPD symptoms, including emotion regulation difficulties, appear to be warranted in these cases., (Copyright © 2015. Published by Elsevier Ltd.)
- Published
- 2016
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28. Rational design of a degradable polyanion for layer-by-layer assembly for encapsulation and release of cationic functional biomolecules.
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Hiraoka R, Funasaki Y, Ishii J, and Maruyama T
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- Adsorption, Animals, Anti-Bacterial Agents chemical synthesis, Anti-Bacterial Agents chemistry, Anti-Bacterial Agents pharmacology, Bacillus subtilis drug effects, Cattle, Chitosan chemistry, Cytochromes c chemistry, Drug Compounding, Fluorescein-5-isothiocyanate, Fluorescent Dyes, HeLa Cells, Horses, Humans, Hydrolysis, Polyethylene Glycols chemical synthesis, Polyethylene Glycols pharmacology, Ribonuclease, Pancreatic chemistry, Muramidase chemistry, Polyethylene Glycols chemistry
- Abstract
A novel degradable polyanion, poly(phthalic ethylene glycol ester), was synthesized in one pot in a single step. The degradable polyanion assembles with various polycations to form layer-by-layer films that can encapsulate physiologically active biomolecules. Polyanion degradation can induce film disassembly and release of the encapsulated functional protein.
- Published
- 2015
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29. Additional Effects of Platelet-Rich Fibrin on Bone Regeneration in Sinus Augmentation With Deproteinized Bovine Bone Mineral: Preliminary Results.
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Tanaka H, Toyoshima T, Atsuta I, Ayukawa Y, Sasaki M, Matsushita Y, Hiraoka R, Koyano K, and Nakamura S
- Subjects
- Adult, Aged, Alveolar Process anatomy & histology, Alveolar Process drug effects, Animals, Bone Substitutes therapeutic use, Cattle, Dental Implantation, Endosseous methods, Humans, Middle Aged, Blood Platelets physiology, Bone Regeneration drug effects, Fibrin pharmacology, Sinus Floor Augmentation methods
- Abstract
Purpose: Platelet-rich fibrin (PRF) has been reported to contribute to bone regeneration; however, little is known about details with deproteinized bovine bone mineral (DBBM). This study aims to evaluate additional effects of PRF on bone regeneration in sinus augmentation with DBBM., Materials and Methods: Sinus augmentations were made with DBBM/PRF mixture as lateral approach for 4 sinuses from 4 patients. Bone biopsies were obtained from posterior maxilla at the implant placements 7 or 10 months after sinus augmentations. Histological observations and histomorphometric analyses from augmented areas were performed., Results: The new bone formation was found around the DBBMs with very good contact while surfaces of DBBMs were partly resorbed. Osteoclasts recognized the DBBMs for remodeling, followed by new bone running. The histomorphometric analyses revealed that mean percentages of newly formed bone were 31.7 ± 1.2%, 21.0 ± 1.0%, 38.0 ± 0.6%, and 47.0 ± 0.6%, respectively (mean 34.5 ± 5.7%)., Conclusions: Additional effects of PRF could be found because of higher percentages of newly bone formation by DBBM/PRF mixture than those by DBBM individual in previous reports.
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- 2015
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30. Self-Compassion as a prospective predictor of PTSD symptom severity among trauma-exposed U.S. Iraq and Afghanistan war veterans.
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Hiraoka R, Meyer EC, Kimbrel NA, DeBeer BB, Gulliver SB, and Morissette SB
- Subjects
- Adult, Afghan Campaign 2001-, Diagnostic and Statistical Manual of Mental Disorders, Female, Humans, Iraq War, 2003-2011, Male, Middle Aged, Psychiatric Status Rating Scales, Self Report, Severity of Illness Index, United States, Empathy, Self Psychology, Stress Disorders, Post-Traumatic psychology, Veterans psychology, Warfare
- Abstract
U.S. combat veterans of the Iraq and Afghanistan wars have elevated rates of posttraumatic stress disorder (PTSD) compared to the general population. Self-compassion, characterized by self-kindness, a sense of common humanity when faced with suffering, and mindful awareness of suffering, is a potentially modifiable factor implicated in the development and maintenance of PTSD. We examined the concurrent and prospective relationship between self-compassion and PTSD symptom severity after accounting for level of combat exposure and baseline PTSD severity in 115 Iraq and Afghanistan war veterans exposed to 1 or more traumatic events during deployment. PTSD symptoms were assessed using the Clinician Administered PTSD Scale for DSM-IV (CAPS-IV) at baseline and 12 months (n =101). Self-compassion and combat exposure were assessed at baseline via self-report. Self-compassion was associated with baseline PTSD symptoms after accounting for combat exposure (β = -.59; p < .001; ΔR(2) = .34; f(2) = .67; large effect) and predicted 12-month PTSD symptom severity after accounting for combat exposure and baseline PTSD severity (β = -.24; p = .008; ΔR(2) = .03; f(2) = .08; small effect). Findings suggest that interventions that increase self-compassion may be beneficial for treating chronic PTSD symptoms among some Iraq and Afghanistan war veterans., (Copyright © 2015 Wiley Periodicals, Inc., A Wiley Company.)
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- 2015
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31. Comparison of the immunogenicity and safety of polysaccharide and protein-conjugated pneumococcal vaccines among the elderly aged 80 years or older in Japan: an open-labeled randomized study.
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Namkoong H, Funatsu Y, Oishi K, Akeda Y, Hiraoka R, Takeshita K, Asami T, Yagi K, Kimizuka Y, Ishii M, Tasaka S, Suzuki Y, Iwata S, Betsuyaku T, and Hasegawa N
- Subjects
- Aged, 80 and over, Enzyme-Linked Immunosorbent Assay, Female, Heptavalent Pneumococcal Conjugate Vaccine administration & dosage, Heptavalent Pneumococcal Conjugate Vaccine adverse effects, Humans, Japan, Male, Nursing Homes, Phagocytosis, Pneumococcal Vaccines administration & dosage, Pneumococcal Vaccines adverse effects, Polysaccharides, Bacterial administration & dosage, Serogroup, Time Factors, Vaccination, Heptavalent Pneumococcal Conjugate Vaccine immunology, Immunoglobulin G blood, Immunoglobulin G immunology, Pneumococcal Infections prevention & control, Pneumococcal Vaccines immunology, Polysaccharides, Bacterial immunology, Streptococcus pneumoniae immunology
- Abstract
An open-labeled randomized study was conducted to compare the immunogenicity and safety of polysaccharide (PPV23) or protein-conjugated pneumococcal vaccine (PCV7) among the elderly aged 80 years or older. A total of 105 nursing home residents were enrolled in this study. We analyzed the geometric mean concentration (GMC) of serotype-specific immunoglobulin G (IgG) and the geometric mean titer (GMT) of the opsonization index (OI) for serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F. The GMCs of serotype-specific IgG and the GMTs of the OI significantly increased one month after vaccination in both groups for all seven serotypes evaluated. In the PCV7 group, study subjects with serotypes 4, 9V, 18C, and 23F exhibited statistically significant elevations in both serotype-specific IgGs and OIs compared to those of the PPV23 group. Both vaccines were tolerated without any severe adverse events, and no differences in systemic adverse events were observed between the two groups, although adverse reactions such as redness and localized swelling were more common in the PCV7 group. Our data demonstrated that the GMCs of serotype-specific IgG and the GMTs of the OI were higher in the PCV7 group compared to those in the PPV23 group. Our study also confirmed the safety of both the PCV7 and PPV23 vaccines in elderly people aged 80 years or older., (Copyright © 2014 The Authors. Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2015
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32. Pain tolerance, pain sensitivity, and accessibility of aggression-related schemata in parents at-risk for child physical abuse.
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Hiraoka R, Crouch JL, Reo G, Wagner M, Milner JS, and Skowronski JJ
- Subjects
- Adult, Child, Female, Humans, Male, Mental Processes, Pain Threshold psychology, Risk Factors, Surveys and Questionnaires, Aggression psychology, Child Abuse prevention & control, Pain Measurement methods, Pain Threshold physiology, Parents psychology
- Abstract
This study examined whether parents with varying degrees of child physical abuse (CPA) risk differed in pain tolerance, pain sensitivity, and accessibility of aggression-related schemata. Participants included 91 (51 low CPA risk and 40 high CPA risk) general population parents. Participants were randomly assigned to complete either an easy or a difficult anagram task. Pain tolerance and pain sensitivity were assessed using a cold pressor task. Accessibility of aggression-related schemata was assessed at the outset of the data collection session and at the end of the session using a word completion task. Parents' self-reported negative affect was assessed three times over the course of the study: baseline, after the anagram task, and after the cold pressor task. As expected, high-risk (compared to low-risk) parents reported higher levels of negative affect at each time point. Moreover, after completing the difficult anagram task, high-risk (compared to low-risk) parents exhibited higher pain sensitivity during the cold pressor task. Following completion of the cold pressor task, high-risk (compared to low-risk) parents exhibited greater accessibility of aggression-related schemata. Collectively, these findings indicate that under certain conditions, high-risk parents experience a confluence of aggression-related risk factors (i.e., negative affect, pain sensitivity, and aggression-related information processes) that may predispose them to aggressive behavior., (Published by Elsevier Ltd.)
- Published
- 2014
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33. Child physical abuse risk moderates spontaneously inferred traits from ambiguous child behaviors.
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McCarthy RJ, Crouch JL, Skowronski JJ, Milner JS, Hiraoka R, Rutledge E, and Jenkins J
- Subjects
- Adult, Aggression, Case-Control Studies, Child, Female, Humans, Male, Perception, Child Abuse prevention & control, Child Behavior, Parenting psychology, Personality, Risk Assessment methods
- Abstract
The present study examined whether parents at high-risk for child physical abuse (CPA) differed from low-risk parents in their tendency to infer positive traits and negative traits from children's behaviors. The final sample consisted of 58 (25 low CPA risk and 33 high CPA risk) parents. Parents completed a false-recognition task, which involved viewing behavior descriptions paired with child photographs. Half of the behavior descriptions vaguely/strongly implied a trait and half of the implied traits were positive/negative. The contributions of automatic processes and controlled processes to task performance were examined using process dissociation procedures. Low CPA risk parents were significantly less likely to indicate negative traits were present in behavioral descriptions of children when negative traits were vaguely (compared to strongly) implied. In contrast, high CPA risk parents were equally likely to indicate negative traits were present regardless of whether the traits were vaguely or strongly implied. For low (but not high) CPA risk parents, automatic processes contributed significantly less to task performance when negative traits were vaguely implied compared to when the same traits were strongly implied. Given that parenting involves negotiating a seemingly endless series of ambiguous behaviors as children grow and develop, the capacity to refrain from automatically attributing negative traits to children when they exhibit vaguely negative behaviors may serve an important function in reducing risk of aggressive parenting behavior., (Copyright © 2013 Elsevier Ltd. All rights reserved.)
- Published
- 2013
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34. Assessing psychological inflexibility: the psychometric properties of the Avoidance and Fusion Questionnaire for Youth in two adult samples.
- Author
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Fergus TA, Valentiner DP, Gillen MJ, Hiraoka R, Twohig MP, Abramowitz JS, and McGrath PB
- Subjects
- Adaptation, Psychological, Adolescent, Adult, Aged, Anxiety Disorders psychology, Child, Comprehension, Factor Analysis, Statistical, Female, Humans, Male, Middle Aged, Predictive Value of Tests, Psychiatric Status Rating Scales, Regression Analysis, Surveys and Questionnaires, Young Adult, Anxiety Disorders diagnosis, Avoidance Learning, Personality Assessment standards, Psychometrics statistics & numerical data, Self Report standards, Set, Psychology
- Abstract
The current study examined whether the Avoidance and Fusion Questionnaire for Youth (AFQ-Y; L. A. Greco, W. Lambert, & R. A. Baer, 2008), a self-report measure of psychological inflexibility for children and adolescents, might be useful for measuring psychological inflexibility for adults. The psychometric properties of the AFQ-Y were examined using data from a college student sample (N = 387) and a clinical sample of patients with anxiety disorders (N = 115). The AFQ-Y, but not the Acceptance and Action Questionnaire-II (AAQ-II; F. W. Bond et al., in press), demonstrated a reading level at or below the recommended 5th or 6th grade reading level. The AFQ-Y also demonstrated adequate reliability (internal consistency), factorial validity, convergent and discriminant validity, and concurrent validity predicting psychological symptoms. Moreover, the AFQ-Y showed incremental validity over the AAQ-II in predicting several psychological symptom domains. Implications for the assessment of psychological inflexibility are discussed., ((c) 2012 APA, all rights reserved)
- Published
- 2012
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35. Event-related potentials: search for positive and negative child-related schemata in individuals at low and high risk for child physical abuse.
- Author
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Milner JS, Rabenhorst MM, McCanne TR, Crouch JL, Skowronski JJ, Fleming MT, Hiraoka R, and Risser HJ
- Subjects
- Adolescent, Child, Female, Humans, Male, Midwestern United States, Photic Stimulation, Risk Assessment methods, Semantics, Young Adult, Child Abuse psychology, Evoked Potentials physiology
- Abstract
Objective: The present investigation used event-related potentials (ERPs, N400 and N300) to determine the extent to which individuals at low and high risk for child physical abuse (CPA) have pre-existing positive and negative child-related schemata that can be automatically activated by ambiguous child stimuli., Methods: ERP data were obtained from individuals at low (n=13) and high risk (n=12) for CPA and used in a procedure check, from which a sub-group of low-risk (n=7) and high-risk (n=7) individuals were selected for inclusion in the main study. ERP data were collected during the presentation of a priming paradigm consisting of non-child pictures (primes) and congruent and incongruent word descriptors (targets). ERP data also were collected during a second priming paradigm consisting of ambiguous child pictures (primes) and positive and negative word descriptors (targets). Data from this second paradigm were used to test the hypothesis that low-risk and high-risk individuals' putative pre-existing child-related schemata (i.e., positive schemata in low-risk individuals and negative schemata in high-risk individuals) provide a context that influences whether targets (positive or negative word descriptors) are congruent or incongruent with ambiguous child picture primes., Results: Analyses revealed the expected larger N400 waves in response to non-child picture, incongruent word pairs. There were no N400 differences between risk groups nor were there any risk group interactions, indicating that all participants responded in a similar manner to the non-child picture, congruent/incongruent word presentations. However, when ambiguous child picture primes were used with positive and negative word descriptors, low-risk individuals showed greater N400 and N300 responses to negative, relative to positive, word descriptors; whereas high-risk individuals showed no ERP differences with respect to positive and negative word descriptors., Conclusions: ERP evidence supports the view that low-risk individuals have greater accessibility to pre-existing positive (relative to negative) child-related schemata, which may reduce the likelihood of negative child-related evaluations. In contrast, high-risk individuals have pre-existing positive and negative child-related schemata that are equally accessible. Hence, high-risk, relative to low-risk, individuals appear to have greater accessibility to negative child-related schemata that may increase the likelihood of negative child-related evaluations and attributions that have been linked to CPA risk., (Copyright © 2011 Elsevier Ltd. All rights reserved.)
- Published
- 2011
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36. Association between beta-adrenoceptor gene polymorphisms and relative response to beta 2-agonists and anticholinergic drugs in Japanese asthmatic patients.
- Author
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Asano K, Yamada-Yamasawa W, Kudoh H, Matsuzaki T, Nakajima T, Hakuno H, Hiraoka R, Fukunaga K, Oguma T, Sayama K, Yamaguchi K, Nagabukuro A, Harada Y, and Ishizaka A
- Subjects
- Adult, Aged, Asthma physiopathology, Female, Genetic Association Studies, Humans, Japan, Male, Middle Aged, Polymorphism, Genetic, Respiratory Function Tests, Smoking adverse effects, Adrenergic beta-Agonists therapeutic use, Anti-Asthmatic Agents therapeutic use, Asthma drug therapy, Bronchodilator Agents therapeutic use, Cholinergic Antagonists therapeutic use, Receptors, Adrenergic, beta-2 genetics
- Abstract
Background and Objective: Whether beta(2)-adrenoceptor gene (ADRB2) polymorphisms are associated with airway responsiveness to beta(2)-agonist medications remains controversial, partly due to factors that may confound pharmacogenetic associations, including age, cigarette smoking and airway remodelling. To overcome these problems, we performed an analysis using parameters that reflected the specific bronchodilator response to beta(2)-agonists., Methods: The increases in FEV(1) after inhalation of procaterol hydrochloride (Delta FEV(1) procaterol) or oxitropium bromide (Delta FEV(1) oxitropium), and after sequential inhalation of procaterol and oxitropium (total airway reversibility), were measured in 81 Japanese patients with moderate to severe asthma. Approximately 3 kb of the DNA sequence of the coding and 5'-flanking regions of ADRB2 were genotyped by direct sequencing and PCR-restriction fragment length polymorphism assay., Results: The mean age of the participants was 54 years, and 38 (47%) were smokers. Although Delta FEV(1) procaterol and Delta FEV(1) oxitropium adjusted for predicted FEV(1) were not associated with ADRB2 polymorphisms, the ratio of Delta FEV(1) procaterol to total airway reversibility was significantly associated with the ADRB2 A46G genotype (P < 0.05). Patients who were homozygous for the A46 allele (arginine at amino acid 16) were more responsive than carriers of the G46 (glycine 16) allele (P = 0.008). Multivariate linear regression analysis showed that Delta FEV(1) procaterol was correlated with the number of A46 alleles (P = 0.014), and also with total airway reversibility (P < 0.001) and smoking index in current smokers (P = 0.009)., Conclusions: The ADRB2 A46G polymorphism was associated with a relatively greater bronchodilator responsiveness to beta(2)-agonists even in elderly asthmatic patients and smokers.
- Published
- 2010
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37. Simultaneous measurement of pazufloxacin, ciprofloxacin, and levofloxacin in human serum by high-performance liquid chromatography with fluorescence detection.
- Author
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Watabe S, Yokoyama Y, Nakazawa K, Shinozaki K, Hiraoka R, Takeshita K, and Suzuki Y
- Subjects
- Ciprofloxacin chemistry, Drug Stability, Fluoroquinolones chemistry, Humans, Least-Squares Analysis, Ofloxacin chemistry, Oxazines chemistry, Reproducibility of Results, Sensitivity and Specificity, Chromatography, High Pressure Liquid methods, Ciprofloxacin blood, Fluoroquinolones blood, Levofloxacin, Ofloxacin blood, Oxazines blood, Spectrometry, Fluorescence methods
- Abstract
In this study, three fluoroquinolones, pazufloxacin, ciprofloxacin and levofloxacin, were simultaneously determined in spiked human serum by high-performance liquid chromatography (HPLC) method with fluorescence detection. Chromatography was performed using a C8 column with an isocratic mobile phase consisting of 1% triethylamine (pH 3.0)/acetonitrile (86/14, v/v). Protein precipitation was conducted using perchloric acid and methanol. The calibration curves for the three fluoroquinolones were linear over concentrations ranging from 0.1 to 20.0 microg/mL. The within-day and between-day coefficients of variation obtained from three fluoroquinolones were less than 7%, and relative errors ranged from -1.6% to 9.3%. Mean recoveries of pazufloxacin, ciprofloxacin, and levofloxacin from spiked human serum were 97%, 88%, and 90%, respectively. The proposed method proved to be simple and reliable for the determination of three fluoroquinolones., (Copyright 2010 Elsevier B.V. All rights reserved.)
- Published
- 2010
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38. Theoretical study of CO escaping pathway in myoglobin with the 3D-RISM theory.
- Author
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Kiyota Y, Hiraoka R, Yoshida N, Maruyama Y, Imai T, and Hirata F
- Subjects
- Carbon Monoxide metabolism, Models, Theoretical, Myoglobin metabolism, Protein Binding, Carbon Monoxide chemistry, Myoglobin chemistry
- Abstract
CO escaping pathways of Myoglobin were investigated in terms of 3D distribution function which was calculated by the 3D-RISM theory. The partial molar volume changes through the CO escaping pathways show excellent agreement with those from the experiment.
- Published
- 2009
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39. Three-dimensional distribution function theory for the prediction of protein-ligand binding sites and affinities: application to the binding of noble gases to hen egg-white lysozyme in aqueous solution.
- Author
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Imai T, Hiraoka R, Seto T, Kovalenko A, and Hirata F
- Subjects
- Animals, Binding Sites, Chickens, Crystallography, X-Ray, Ligands, Models, Molecular, Protein Binding, Protein Conformation, Solutions, Egg Proteins chemistry, Models, Chemical, Muramidase chemistry, Xenon chemistry
- Abstract
The three-dimensional distribution function theory of molecular liquids is applied to lysozyme in mixtures of water and noble gases. The results indicate that the theory has the capability of predicting the protein-ligand binding sites and affinities. First, it is shown that the theory successfully reproduces the binding sites of xenon found by X-ray crystallography. Then, the ability of the theory to predict the size selectivity of noble gases is demonstrated. The effect of water on the selectivity is clarified by a theoretical analysis. Finally, it is demonstrated that the dose-response curve, which is employed in experiments for examining the binding affinity, is realized by the theory.
- Published
- 2007
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40. Locating missing water molecules in protein cavities by the three-dimensional reference interaction site model theory of molecular solvation.
- Author
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Imai T, Hiraoka R, Kovalenko A, and Hirata F
- Subjects
- Computational Biology, Computer Simulation, Crystallography, X-Ray, Hydrogen chemistry, Models, Molecular, Oxygen chemistry, Protein Structure, Tertiary, Protein Folding, Proteins chemistry, Proteins metabolism, Water chemistry, Water metabolism
- Abstract
Water molecules confined in protein cavities are of great importance in understanding the protein structure and functions. However, it is a nontrivial task to locate such water molecules in protein by the ordinary molecular simulation and modeling techniques as well as experimental methods. The present study proves that the three-dimensional reference interaction site model (3D-RISM) theory, a recently developed statistical-mechanical theory of molecular solvation, has an outstanding advantage in locating such water molecules. In this paper, we demonstrate that the 3D-RISM theory is able to reproduce the structure and the number of water molecules in cavities of hen egg-white lysozyme observed commonly in the X-ray structures of different resolutions and conditions. Furthermore, we show that the theory successfully identified a water molecule in a cavity, the existence of which has been ambiguous even from the X-ray results. In contrast, we confirmed that molecular dynamics simulation is helpless at present to find such water molecules because the results substantially depend on the initial coordinates of water molecules. Possible applications of the theory to problems in the fields of biochemistry and biophysics are also discussed., ((c) 2006 Wiley-Liss, Inc.)
- Published
- 2007
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41. Various adhesion molecules impair microvascular leukocyte kinetics in ventilator-induced lung injury.
- Author
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Miyao N, Suzuki Y, Takeshita K, Kudo H, Ishii M, Hiraoka R, Nishio K, Tamatani T, Sakamoto S, Suematsu M, Tsumura H, Ishizaka A, and Yamaguchi K
- Subjects
- Animals, Disease Models, Animal, In Vitro Techniques, Leukocytes cytology, Male, Microscopy, Confocal, Neutrophils physiology, Rats, Rats, Sprague-Dawley, Endothelium, Vascular physiology, Intercellular Adhesion Molecule-1 metabolism, Leukocytes physiology, Lung Diseases etiology, Lung Diseases physiopathology, Microcirculation physiology, P-Selectin metabolism, Vascular Cell Adhesion Molecule-1 metabolism, Ventilators, Mechanical adverse effects
- Abstract
Although the endothelial expression of various adhesion molecules substantially differs between pulmonary microvessels, their importance for neutrophil and lymphocyte sequestration in ventilator-induced lung injury (VILI) has not been systematically analyzed. We investigated the kinetics of polymorphonuclear cells (PMN) and mononuclear cells (MN) in the acinar microcirculation of the isolated rat lung with VILI by real-time confocal laser fluorescence microscopy, with or without inhibition of ICAM-1, VCAM-1, or P-selectin by monoclonal antibodies (MAb). Adhesion molecules in each microvessel were estimated by intravital fluorescence microscopy or immunohistochemical staining. In high tidal volume-ventilated lungs, 1) ICAM-1, VCAM-1, and P-selectin were differently upregulated in venules, arterioles, and capillaries; 2) venular PMN rolling was improved by inhibition of ICAM-1, VCAM-1, or P-selectin, whereas arteriolar PMN rolling was improved by ICAM-1 or VCAM-1 inhibition; 3) capillary PMN entrapment was ameliorated only by anti-ICAM-1 MAb; and 4) MN rolling in venules and arterioles and MN entrapment in capillaries were improved by ICAM-1 and VCAM-1 inhibition. In conclusion, the contribution of endothelial adhesion molecules to abnormal leukocyte behavior in VILI-injured microcirculation is microvessel and leukocyte specific. ICAM-1- and VCAM-1-dependent, but P-selectin-independent, arteriolar PMN rolling, which is expected to reflect the initial stage of tissue injury, should be taken as a phenomenon unique to ventilator-associated lung injury.
- Published
- 2006
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42. Analysis of a homologue of the adducin head gene which is a potential target for the Dictyostelium STAT protein Dd-STATa.
- Author
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Aoshima R, Hiraoka R, Shimada N, and Kawata T
- Subjects
- Actins metabolism, Amino Acid Sequence, Animals, Base Sequence, Calmodulin-Binding Proteins metabolism, Dictyostelium genetics, Molecular Sequence Data, Promoter Regions, Genetic, Protozoan Proteins physiology, Calmodulin-Binding Proteins genetics, Dictyostelium metabolism, Protozoan Proteins genetics, Protozoan Proteins metabolism, STAT Transcription Factors physiology
- Abstract
A Dd-STATa-null mutant, which is defective in expression of a Dictyostelium homologue of the metazoan STAT (signal transducers and activators of transcription) proteins, fails to culminate and this phenotype correlates with the loss of expression of various prestalk (pst) genes. An EST clone, SSK395, encodes a close homologue of the adducin amino-terminal head domain and harbors a putative actin-binding domain. We fused promoter fragments of the cognate gene, ahhA (adducin head homologue A), to a lacZ reporter and determined their expression pattern. The proximal promoter region is necessary for the expression of ahhA at an early (pre-aggregative) stage of development and this expression is Dd-STATa independent. The distal promoter region is necessary for expression at later stages of development in pstA cells, of the slug and in upper cup and pstAB cells during culmination. The distal region is partly Dd-STATa-dependent. The ahhA-null mutant develops almost normally until culmination, but it forms slanting culminants that tend to collapse on to the substratum. The mutant also occasionally forms fruiting bodies with swollen papillae and with constrictions in the prestalk region. The AhhA protein localizes to the stalk tube entrance and also to the upper cup cells and in cells at or near to the constricted region where an F-actin ring is localized. These findings suggest that Dd-STATa regulates culmination and may be necessary for straight downward elongation of the stalk, via the putative actin-binding protein AhhA.
- Published
- 2006
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43. Water molecules in a protein cavity detected by a statistical-mechanical theory.
- Author
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Imai T, Hiraoka R, Kovalenko A, and Hirata F
- Subjects
- Animals, Binding Sites, Chickens, Muramidase chemistry, Protein Folding, Water analysis, Models, Theoretical, Proteins chemistry, Water chemistry
- Abstract
Four water molecules confined in a small cavity of hen egg-white lysozyme were detected by means of the three-dimensional (3D) RISM theory, a statistical-mechanical theory of molecular solutions. This is the first theoretical realization of confined molecules in a protein without making nonsense tricks, such as placing the molecules in the space a priori. Possible impacts which the result may have on biochemistry and biophysics, including the molecular recognition, enzymatic reactions, etc., are discussed.
- Published
- 2005
- Full Text
- View/download PDF
44. Inhibition of c-Jun NH2-terminal kinase activity improves ischemia/reperfusion injury in rat lungs.
- Author
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Ishii M, Suzuki Y, Takeshita K, Miyao N, Kudo H, Hiraoka R, Nishio K, Sato N, Naoki K, Aoki T, and Yamaguchi K
- Subjects
- Animals, Apoptosis, Bronchoalveolar Lavage Fluid chemistry, Carrier Proteins metabolism, Carrier Proteins therapeutic use, Catechin therapeutic use, DNA-Binding Proteins metabolism, Enzyme Activation, Enzyme Inhibitors metabolism, Enzyme Inhibitors therapeutic use, In Vitro Techniques, JNK Mitogen-Activated Protein Kinases, L-Lactate Dehydrogenase metabolism, Lung metabolism, Lung pathology, Male, Mitogen-Activated Protein Kinases physiology, NF-kappa B metabolism, Phosphorylation, Proteins metabolism, Rats, Rats, Sprague-Dawley, Reperfusion Injury pathology, Transcription Factor AP-1 metabolism, Tumor Necrosis Factor-alpha metabolism, Up-Regulation immunology, p38 Mitogen-Activated Protein Kinases, Adaptor Proteins, Signal Transducing, Catechin analogs & derivatives, Lung blood supply, Lung enzymology, Mitogen-Activated Protein Kinases antagonists & inhibitors, Mitogen-Activated Protein Kinases metabolism, Reperfusion Injury enzymology, Reperfusion Injury prevention & control
- Abstract
Although c-Jun NH(2)-terminal kinase (JNK) has been implicated in the pathogenesis of transplantation-induced ischemia/reperfusion (I/R) injury in various organs, its significance in lung transplantation has not been conclusively elucidated. We therefore attempted to measure the transitional changes in JNK and AP-1 activities in I/R-injured lungs. Subsequently, we assessed the effects of JNK inhibition by the three agents including SP600125 on the degree of lung injury assessed by means of various biological markers in bronchoalveolar lavage fluid and histological examination including detection of apoptosis. In addition, we evaluated the changes in p38, extracellular signal-regulated kinase, and NF-kappaB-DNA binding activity. I/R injury was established in the isolated rat lung preserved in modified Euro-Collins solution at 4 degrees C for 4 h followed by reperfusion at 37 degrees C for 3 h. We found that AP-1 was transiently activated during ischemia but showed sustained activation during reperfusion, leading to significant lung injury and apoptosis. The change in AP-1 was generally in parallel with that of JNK, which was activated in epithelial cells (bronchial and alveolar), alveolar macrophages, and smooth muscle cells (bronchial and vascular) on immunohistochemical examination. The change in NF-kappaB qualitatively differed from that of AP-1. Protein leakage, release of lactate dehydrogenase and TNF-alpha into bronchoalveolar lavage fluid, and lung injury were improved, and apoptosis was suppressed by JNK inhibition. In conclusion, JNK plays a pivotal role in mediating lung injury caused by I/R. Therefore, inhibition of JNK activity has potential as an effective therapeutic strategy for preventing I/R injury during lung transplantation.
- Published
- 2004
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45. Hypercapnic acidosis attenuates endotoxin-induced nuclear factor-[kappa]B activation.
- Author
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Takeshita K, Suzuki Y, Nishio K, Takeuchi O, Toda K, Kudo H, Miyao N, Ishii M, Sato N, Naoki K, Aoki T, Suzuki K, Hiraoka R, and Yamaguchi K
- Subjects
- CD11b Antigen metabolism, CD18 Antigens metabolism, Cell Adhesion, Cells, Cultured, Down-Regulation, Endothelium, Vascular cytology, Endothelium, Vascular drug effects, Endothelium, Vascular metabolism, Humans, I-kappa B Proteins metabolism, Intercellular Adhesion Molecule-1 genetics, Intercellular Adhesion Molecule-1 metabolism, Interleukin-8 genetics, Interleukin-8 metabolism, Lipopolysaccharides toxicity, Macrophage-1 Antigen metabolism, Neutrophils metabolism, Pulmonary Artery cytology, Signal Transduction, Transcription Factor AP-1 drug effects, Transcription Factor AP-1 metabolism, Transcription Factors drug effects, Transcription Factors metabolism, Acidosis, Respiratory metabolism, Endotoxins pharmacology, Hypercapnia metabolism, NF-kappa B metabolism
- Abstract
Although permissive hypercapnia improves the prognosis of patients with acute respiratory distress syndrome, it has not been conclusively determined whether hypercapnic acidosis (HA) is harmful or beneficial to sustained inflammation of the lung. The present study was designed to explore the molecular mechanism of HA in modifying lipopolysaccharide (LPS)-associated signals in pulmonary endothelial cells. LPS elicited degradation of inhibitory protein kappaB (IkappaB)-alpha, but not IkappaB-beta, resulting in activation of nuclear factor (NF)-kappaB in human pulmonary artery endothelial cells. Exposure to HA significantly attenuated LPS-induced NF-kappaB activation through suppressing IkappaB-alpha degradation. Isocapnic acidosis and buffered hypercapnia showed qualitatively similar but quantitatively smaller effects. HA did not attenuate the LPS-enhanced activation of activator protein-1. Following the reduced NF-kappaB activation, HA suppressed the mRNA and protein levels of intercellular adhesion molecule-1 and interleukin-8, resulting in a decrease in both lactate dehydrogenase release into the medium and neutrophil adherence to LPS-activated human pulmonary artery endothelial cells. In contrast, HA did not inhibit LPS-enhanced neutrophil expression of integrin, Mac-1. Based on these findings, we concluded that hypercapnic acidosis would have anti-inflammatory effects essentially through a mechanism inhibiting NF-kappaB activation, leading to downregulation of intercellular adhesion molecule-1 and interleukin-8, which in turn inhibits neutrophil adherence to pulmonary endothelial cells.
- Published
- 2003
- Full Text
- View/download PDF
46. A case of poorly differentiated hilar lung adenocarcinoma of an unidentified histological type.
- Author
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Ogawa S, Fukunaga K, Hiraoka R, Kohda E, Yamaguchi K, Ito D, and Hata J
- Subjects
- Adenocarcinoma diagnostic imaging, Adenocarcinoma pathology, Aged, Bone Neoplasms secondary, Cell Differentiation, Diagnosis, Differential, Humans, Liver Neoplasms secondary, Lung Neoplasms diagnostic imaging, Lung Neoplasms pathology, Lymphatic Metastasis, Male, Neoplasm Staging, Tomography, X-Ray Computed, Adenocarcinoma diagnosis, Lung Neoplasms diagnosis
- Abstract
The patient was a 74-year-old man, a physician, whose chief complaint was an unproductive cough. The shadow of a mass was seen at the hilum of the left lung, and the mediastinal lymph nodes on both sides were swollen. No histological diagnosis was obtained even after bronchoscopy, including transbronchial needle aspiration biopsy, but large-cell carcinoma of the lung was diagnosed on the basis of ultrasound-guided biopsy of a shadow in the liver suspected of being a metastatic tumor (T2N3M1, Stage IV). Two courses of chemotherapy (CBCDA + VDS) failed to gain any improvement, and the pain resulting from recurrent bone metastases was managed mainly by the administration of the best supportive care. The patient was readmitted to the hospital after development of numbness in the right upper extremity followed by complication of pneumonia and heart failure, and he passed away. Autopsy revealed a primary hilar lung tumor with a histological diagnosis of poorly differentiated adenocarcinoma.
- Published
- 2000
47. Involvement of histone phosphorylation in thymocyte apoptosis by protein phosphatase inhibitors.
- Author
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Lee E, Nakatsuma A, Hiraoka R, Ishikawa E, Enomoto R, and Yamauchi A
- Subjects
- Animals, Cells, Cultured, Marine Toxins, Phosphates metabolism, Phosphorylation, Rats, Rats, Sprague-Dawley, T-Lymphocytes cytology, T-Lymphocytes physiology, Apoptosis drug effects, Enzyme Inhibitors pharmacology, Histones metabolism, Okadaic Acid pharmacology, Oxazoles pharmacology, Protein Tyrosine Phosphatases antagonists & inhibitors, T-Lymphocytes drug effects, Thymus Gland cytology
- Abstract
Incubation of rat thymocytes with the inhibitors of protein phosphatase such as calyculin A and okadaic acid resulted in an increase in DNA fragmentation. These effects were dependent on the concentration of the inhibitors and the incubation time. Analyses of the fragmented DNA revealed the production of approximately 50 kbp of DNA and a 180 bp DNA ladder. In addition, a laser scanning-microscopic analysis showed that these compounds caused nuclear condensation. Thus, these results demonstrated that protein phosphatase inhibitors induced thymocyte apoptosis. The inhibitors of protein phosphatase increased the phosphorylation of proteins of approximately 15 kDa. The phosphorylation of proteins preceded the DNA fragmentation induced by these inhibitors. Judging from acetic acid-urea-Triton X-100 gel electrophoresis, the phosphorylated proteins were histone H1 and H2A/H3. Therefore, these results suggest that phosphorylation of histones triggers the DNA fragmentation of thymocytes undergoing apoptosis.
- Published
- 1999
- Full Text
- View/download PDF
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