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Ogawa Y, Shibamoto Y, Murai T, Manabe Y, Sugie C, Yanagi T, Uchiyama K, Matsui T, Kondo T, Miyakawa A. What Are the Optimal Radiation Doses for Localized Lesions of Adult T-Cell Leukemia/Lymphoma? Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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77
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Okazaki D, Tatekawa K, Uchiyama K, Hashizume C, Manabe Y, Ogawa Y, Sugie C, Yanagi T, Shibamoto Y. Focal Radiation Therapy for Pleural Dissemination of Thymic Tumors. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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78
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Murai T, Hattori Y, Manabe Y, Okazaki D, Ogawa Y, Nakajima K, Iwata H, Shibamoto Y. Indication of the Multileaf Collimator Technology in a Commercially Available Robotic Radiosurgery System: Which Cases Are Suitable? Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.2205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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79
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Ogawa Y, Kawamura T, Shimada S. 194 An underlying mechanism of hair loss in acrodermatitis enteropathica. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.06.213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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80
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Ogawa Y, Naganuma A, Hoshino T, Hatanaka T, Tanaka H, Inagawa M, Tanaka T, Ogawa T, Sato K, Kakizaki S. OR44: Nutritional Management at the End of Life Using the Cell-Free and Concentrated Ascites Reinfusion Therapy for Patients with the Refractory Ascites. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30283-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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81
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Naganuma A, Ogawa Y, Hoshino T, Hatanaka T, Tanaka H, Inagawa M, Tanaka T, Ogawa T, Sato K, Kakizaki S, Furuta M, Akiyama K. SUN-P050: Effect of the Medical Walking and Leucine Enriched Amino Acid Containing Food for Female Non-Alcoholic Fatty Liver Disease : Randomized Controlled Trial. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30393-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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82
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Matsuzawa T, Kawamura T, Ogawa Y, Aoki R, Shimada S. 277 Prolonged incubation period after initial HIV infection is mediated by CTL activation and Treg cell suppression induced by Langerhans cells. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.06.297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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83
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Ikezoe J, Morimoto S, Akira M, Arisawa J, Takashima S, Tomoda K, Nakanishi K, Kadowaki K, Kozuka T, Shiozaki H, Ogawa Y. Computed Tomography following Endoscopic Sclerotherapy of Esophageal Varices. Acta Radiol 2016. [DOI: 10.1177/028418518702800409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Computed tomography of the chest following endoscopic injection sclerotherapy for esophageal varices was performed in 17 procedures in 13 patients. CT scans were obtained before and within 48 hours after the procedure. CT findings included: esophageal wall thickening; a low-attenuating lesion within the wall of the esophagus with varying appearances, either laminated, localized, or inhomogeneous; a mediastinal lesion; pleural effusion; and various types of pulmonary changes such as atelectasis, pleural-based lesions, dilatation of peripheral pulmonary vessels, and nodular lesions. However, on follow-up CT they had regressed or disappeared. The changes in the mediastinum and pleural space might be caused by direct extension of inflammation from the esophagus, but those in the lungs, especially dilatation of peripheral vessels, may be caused by the sclerosing agent passing to the pulmonary vessels.
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Sugaya K, Nishijima S, Miyazato M, Kadekawa K, Ogawa Y. Effects of Melatonin and Rilmazafone on Nocturia in the Elderly. J Int Med Res 2016; 35:685-91. [PMID: 17900408 DOI: 10.1177/147323000703500513] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
We compared the effects of melatonin, an antioxidant and sleep inducer in humans, and rilmazafone hydrochloride, a hypnotic, in elderly patients with nocturia. Patients received either melatonin (2 mg/day; n = 20) or rilmazafone (2 mg/day; n = 22) for 4 weeks. There were no significant differences in the mean age, the quality of life (QoL) score and the serum melatonin levels between the two groups at baseline. After 4 weeks' treatment, the number of nocturnal urinations was significantly decreased and the QoL score was significantly improved in both groups. There was no significant difference between the patient-reported effectiveness ratings between the two groups. The serum melatonin level was significantly increased in the melatonin-treated group, but it remained unchanged in the rilmazafone-treated group. Melatonin and rilmazafone were equally effective for nocturia in the elderly. We recommend that the problems of sleep disturbance should be considered when choosing a therapy for nocturia.
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85
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Ogawa Y, Kojima T, Takahashi N, Funahashi K, Ishiguro N. SAT0094 The Association between Methotrexate Use and Effects of Treatment with A Second Biologic Agent in Rheumatoid Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.5520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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86
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Ota S, Ogawa Y, Ota H, Fujiwara T, Sugiyama T. FRI0641-HPR Benefical Effect of A Gait Modification, “Nanba Style Walk,” for Decreased Knee Adduction Moment. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.1267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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87
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Ogawa Y, Kojima T, Takahashi N, Funahashi K, Ishiguro N. AB0255 The Association between Rheumatoid Factor Positivity and Effects of Treatment with A First Biologic Agent in Rheumatoid Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.1337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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88
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Ogawa Y, Kawamura T, Shimada S. 676 An underlying mechanism of hair loss in acrodermatitis enteropathica. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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89
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Hosoya T, Ogawa Y, Hashimoto H, Ohashi T, Sakamoto R. Comparison of topiroxostat and allopurinol in Japanese hyperuricemic patients with or without gout: a phase 3, multicentre, randomized, double-blind, double-dummy, active-controlled, parallel-group study. J Clin Pharm Ther 2016; 41:290-7. [PMID: 27109450 DOI: 10.1111/jcpt.12391] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 03/24/2016] [Indexed: 11/28/2022]
Abstract
WHAT IS KNOWN AND OBJECTIVE There are no clinical reports that have compared topiroxostat, a selective xanthine oxidase inhibitor, with allopurinol in serum urate-lowering efficacy. The aim of this study was to compare the efficacy and safety of topiroxostat and allopurinol in Japanese hyperuricemic patients with or without gout. METHODS A phase 3, multicentre, randomized, double-blind, double-dummy, active-controlled, parallel-group study conducted in Japan. Patients who had inadequate serum urate levels (a gout patient: serum urate level ≥416·4 μmol/L; an asymptomatic hyperuricemic patient with specific complications (urinary lithiasis, hypertension, hyperlipidemia and/or diabetes): serum urate level ≥475·8 μmol/L; and an asymptomatic hyperuricemic patient with no specific complications: serum urate level ≥535·3 μmol/L) were randomized to topiroxostat 120 mg/day or allopurinol 200 mg/day, with an equal allocation ratio, for 16 weeks. To prevent the onset of gouty arthritis by rapid serum urate reduction, these doses were increased in a stepwise manner. The primary efficacy endpoint was the per cent change in serum urate level from baseline to the final visit. RESULTS AND DISCUSSION Overall, 206 patients were randomly assigned to topiroxostat and allopurinol. Two hundred and three patients (allopurinol: n = 105, topiroxostat: n = 98) received at least one dose of the study drug and had their serum urate level assessed at least once. The baseline characteristics were comparable between groups. The mean age of patients was 53·0 ± 11·4 years and 99% of patients were male. The primary efficacy endpoint was -34·3 ± 11·1% in the allopurinol group (n = 105) and -36·3 ± 12·7% in the topiroxostat group (n = 98). Non-inferiority of the serum urate-lowering efficacy of topiroxostat to allopurinol was proved by the predefined non-inferiority margin (95% confidence interval, -5·3 to 1·3%). The overall incidences of adverse events and adverse drug reactions were similar between both groups. WHAT IS NEW AND CONCLUSION Topiroxostat 120 mg/day provides non-inferior serum urate reduction compared with allopurinol 200 mg/day and is well tolerated in Japanese hyperuricemic patients with or without gout.
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Kobayashi K, Nishioka A, Ogawa Y, Yamagami T. EP-1146: Non-surgical therapy of early breast cancer with novel enzyme-targeting radiosensitisation. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32396-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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91
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Kondo T, Shibamoto Y, Hayashi A, Miyakawa A, Murai T, Yanagi T, Sugie C, Ogawa Y. EP-1258: Concurrent high-dose (60-70 Gy) radiation and chemotherapy for esophageal cancer: long-term results. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32508-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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92
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Ogawa Y, Kojima K, Mannami R, Mannami M, Kitajima K, Nishi M, Ito S, Mitsuhata N, Afuso H. Transplantation of Restored Kidneys From Unrelated Donors After Resection of Renal Cell Carcinoma: Results From 10 Patients. Transplant Proc 2016; 47:1711-9. [PMID: 26293039 DOI: 10.1016/j.transproceed.2015.06.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 06/02/2015] [Indexed: 02/06/2023]
Abstract
PURPOSE To relieve the chronic shortage of donor kidneys, we conducted a prospective kidney transplantation trial using kidneys removed from 10 unrelated patients (51 to 79 years of age) who had undergone nephrectomy for small renal cell carcinoma (1.5 to 3.9 cm) of low-to-moderate complexity based on RENAL (radius, exophytic/endophytic properties, nearness of tumor to the collecting system or sinus in millimeters, anterior/posterior location relative to polar lines) nephrometry (objective description helpful for operative indication and planning). METHODS Donors were selected from among 15 patients who opted to undergo nephrectomy for small renal cell carcinoma. A total of 76 dialysis patients 34 to 85 years of age who agreed to undergo restored kidney transplantation were recruited as transplant candidates. RESULTS In stage 1 (5 cases), high-risk patients were selected without human leukocyte antigen testing, and accelerated acute rejection occurred in 4 of 5 recipients. This trial was subsequently extended with human leukocyte antigen testing, and an additional 5 patients were enrolled in stage 2. Eight recipients, including 4 recipients with a history of renal transplantation, experienced rejection; 1 patient resumed dialysis 35 months after transplantation. The most recent serum creatinine levels ranged from 1.10 to 3.19 mg/dL in the 9 recipients with functioning grafts and from 0.84 to 4.68 mg/dL in the 10 donors. No tumor recurrence was noted at 32 to 58 months after surgery in either the recipients or the donors. CONCLUSIONS Restored kidney transplantation using kidneys with a small renal tumor seems suitable for carefully selected high-risk recipients and, in particular, elderly kidneys can also function well. Avoiding cancer transmission, fair recipient selection, close follow-up, and a well-organized tracking system warrant further study.
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Yoshizawa K, Kawai K, Fujie M, Suzuki J, Ogawa Y, Yajima T, Yokomori J. Overall safety profile and effectiveness of tramadol hydrochloride/acetaminophen in patients with chronic noncancer pain in Japanese real-world practice. Curr Med Res Opin 2015; 31:2119-29. [PMID: 26359328 DOI: 10.1185/03007995.2015.1091975] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To evaluate the overall safety profile and clinical effectiveness of tramadol hydrochloride/acetaminophen (TA) combination tablets in Japanese patients with chronic noncancer pain unrelieved by non-opioid drugs for up to 12 weeks in real-world practice. RESEARCH DESIGN AND METHODS This survey was a multicenter, prospective, longitudinal registry on the use of TA as a newly initiated pain treatment for chronic noncancer pain incurable by non-opioid analgesics that was conducted under the Good Post Marketing Study Practice regulation controlled by the Japan Ministry of Health, Labor and Welfare. Collected data included socio-demographics, treatment information, incidence of adverse drug reactions (ADRs), numerical rating scale for intensity of pain, EuroQol-5D (EQ-5D) scale, and physician's global impression (PGI) during the 12 week observation period. RESULTS A total of 1316 patients were registered. ADRs were reported in 259 patients (20.5%); most events were nonserious (99.4%), including nausea (n = 87 [6.9%]), constipation (n = 63 [5.0%]), dizziness and somnolence (n = 29 [2.3%] each), and vomiting (n = 21 [1.7%]). No event related to drug dependence or respiratory depression was reported. In addition, 82.8% of patients showed acceptable effectiveness based on PGI at Week 4. Numerical rating scale for intensity of pain and EQ-5D utility scores were improved by -2.7 (SD 2.3) and 0.16 (SD 0.20) at Week 4, respectively, and the improvement was maintained until Week 12. CONCLUSION This is a first report to evaluate the risk-benefit profile of TA in Japanese real-world practice using large size registry data. It is suggested that the favorable risk-benefit balance of TA was confirmed for patients with chronic noncancer pain unrelieved by non-opioid drugs in real-world practice. Limitations of this study were those inherent to open-label and non-interventional study designs. TRIAL REGISTRATION This registry survey is registered at umin.ac.jp (identifier: UMIN000015901).
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Ogawa Y, Shibamoto Y, Kosaki K, Hashizume C, Baba F, Takaoka T, Miyakawa A, Murai T, Yanagi T, Hattori Y, Ogino H. Safety and Efficacy of Repeat Stereotactic Body Radiation Therapy (SBRT) for Local Recurrence of Non-Small Cell Lung Cancer (NSCLC) and Lung Metastasis. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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95
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Kato T, Arafune T, Washio T, Nakagawa A, Ogawa Y, Tominaga T, Sakuma I, Kobayashi E. Measurement and analysis of internal stress distributions created in gelatin simulated-brain tissue by a pulsed laser-induced liquid jet. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2015; 2014:4419-22. [PMID: 25570972 DOI: 10.1109/embc.2014.6944604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Transsphenoidal surgery is currently employed to treat complex lesions beyond the sella turcica; however, the procedure can be limited by difficulties encountered in dealing with small blood vessels, deep and narrow working spaces, and awkward working angles. To overcome these problems, we have developed a pulsed laser-induced liquid jet system that can dissect tumor tissue while preserving fine blood vessels within deep and narrow working spaces. We have previously evaluated the utility and safety of this procedure. However, the effects of the pulsejet after being injected into the brain are not yet well understood. Especially, the behavior of the stress distribution created by the jet is important because it has recently been reported that high acoustic pressures can affect the brain. In this study, we measured internal stress distributions in a gelatin simulated-brain using photoelasticity experiments. We used a high-speed camera with an image sensor on which an array of micropolarizers was attached to measure the stresses and the shear wave created when the pulsejet enters the simulated brain.
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96
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Nishimura S, Takashima T, Kawajiri H, Kashiwagi S, Noda S, Tokunaga S, Tei S, Yamagata S, Sunami T, Tezuka K, Ikeda K, Mizuyama Y, Ogawa Y, Onoda N, Nishimori T, Ishikawa T, Kudo S, Takada M, Hirakawa K. 1859 Clinical effects of prior chemotherapy on eribulin: Update and subgroup analysis of phase 2 multicenter single arm study of eribulin mesylate as first-line therapy for HER2 negative locally advanced or metastatic breast cancer. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30809-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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97
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Naganuma A, Hoshino T, Suzuki Y, Uehara D, Ogawa Y, Ohno N, Tanaka T, Ogawa T, Takagi H, Sato K, Kakizaki S. MON-PP039: Effect of β-Hydroxy-β-Methylbutyric Acid, L-Glutamine, and L-Arginine on Prevention of Hand-Foot Syndrome in Sorafenib Treatment for Advanced Hepatocellular Carcinoma: A Non-Randomized Clinical Trial. Clin Nutr 2015. [DOI: 10.1016/s0261-5614(15)30471-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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98
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Naganuma A, Kawahake Y, Ogawa Y, Yoshida T, Takahashi E, Inagawa M, Shimizu Y, Tanaka T, Ogawa T, Sato K, Kakizaki S. SUN-PP181: Correlation between Nutritional Assessment with the Indirect Calorimeter and Hospitalization Duration: A Cross-Sectional Study. Clin Nutr 2015. [DOI: 10.1016/s0261-5614(15)30332-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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99
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Otagaki S, Ogawa Y, Hibrand-Saint Oyant L, Foucher F, Kawamura K, Horibe T, Matsumoto S. Genotype of FLOWERING LOCUS T homologue contributes to flowering time differences in wild and cultivated roses. PLANT BIOLOGY (STUTTGART, GERMANY) 2015; 17:808-815. [PMID: 25545704 DOI: 10.1111/plb.12299] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 12/15/2014] [Indexed: 06/04/2023]
Abstract
Rose flowers have long delighted humans as ornamental plants. To improve the ornamental value of roses it is necessary to understand the regulatory mechanisms of flowering. We previously found that flowering time is controlled by three minor quantitative trait loci (QTLs) and a major QTL co-localised with RoFT. In this study, we isolated three RoFT alleles encoding completely identical amino acid sequences from the parents of a mapping population. Correlation analysis of the RoFT genotypes and flowering time phenotypes in the mapping population showed that the RoFT_f and RoFT_g alleles contribute to the early-flowering phenotype, while the RoFT_e allele contributes to the late-flowering phenotype. We developed two novel cleaved amplified polymorphic sequence (CAPS) markers based on the genomic sequences of the RoFT alleles and clearly showed that the relationship between RoFT genotype and flowering time was applicable to 12 of 13 cultivated roses grown at the Higashiyama Botanical Gardens, Japan. Allele-specific expression analysis using a reverse transcription CAPS assay suggested that these RoFT alleles are regulated differentially at the transcription level. Furthermore, transgenic Arabidopsis thaliana plants ectopically expressing the RoFT gene showed an early-flowering phenotype. Conversely, in roses, RoFT was continuously expressed after floral bud formation, and RoFT transcript accumulation reached its peak after that of the floral meristem identity gene RoAP1b. These data suggest that RoFT may be essential not only for floral transition but also for normal floral development and flowering in roses.
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Shiraga K, Suzuki T, Kondo N, De Baerdemaeker J, Ogawa Y. Quantitative characterization of hydration state and destructuring effect of monosaccharides and disaccharides on water hydrogen bond network. Carbohydr Res 2015; 406:46-54. [PMID: 25658066 DOI: 10.1016/j.carres.2015.01.002] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2014] [Revised: 01/06/2015] [Accepted: 01/07/2015] [Indexed: 11/30/2022]
Abstract
Terahertz time-domain attenuated total reflection measurements of monosaccharide (glucose and fructose) and disaccharide (sucrose and trehalose) solutions from 0.146 M to 1.462 M were performed to evaluate (1) the hydration state and (2) the destructuring effect of saccharide solutes on the hydrogen bond (HB) network. Firstly, the extent of hydration water was determined by the decreased amount of bulk water with picosecond relaxation time that was replaced by that with much longer orientational relaxation time. As a result, we found glucose and trehalose exhibits stronger hydration capacity than fructose and sucrose, respectively, despite of the same number of the hydroxyl groups. For each saccharide, the hydration number tended to decrease with solute concentration. Secondly, the destructuring effect of these saccharide solutes on the HB network of the surrounding bulk water was discussed from the perspective of the fraction of non-hydrogen-bonded (NHB) water isolated from the HB network. We found the fraction of NHB water molecules that are not engaged in the HB network monotonously increased with saccharide concentration, indicating saccharide solutes promote the disruption of the water HB network. However, no noticeable differences were confirmed in the fraction of NHB water between glucose and fructose or between sucrose and trehalose. In contrast to hydration number, the number of NHB water produced by a single saccharide solute was less dependent on solute concentration, and three monosaccharide/disaccharide solutes were found to produce one/two NHB water molecules.
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