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Nakamichi K, Nakamichi N, Nakazawa J. Longitudinal Relations Among Executive Function, Theory of Mind, and Japanese Language Skills Achievement in Elementary School: A 4-year Longitudinal Study. Psychol Rep 2024; 127:1336-1354. [PMID: 36250541 DOI: 10.1177/00332941221133010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
Abstract
This longitudinal study investigated the roles of elementary schoolers' executive function (EF) and theory of mind (ToM) as predictors in their academic achievements in Japanese language skills (e.g., speaking and listening ability, writing ability, reading ability, and linguistic knowledge) from first through fifth grade. We assessed the EF, ToM, and academic achievements of 85 Japanese elementary schoolers, when they were grade 1 (M = 90.19 months) and grade 3 (M = 114.34 months). Moreover, academic achievements of same children tested in grade 5 (M = 137.92 months). A path analysis revealed that EF abilities in Grades 1 and 3 predicted Japanese language achievement via ToM ability, and EF and ToM in Grade 1 had an indirect effect on achievements in Grades 3 and 5. Further, Japanese language skills achievement in Grade 1 predicted EF ability in Grade 3 and EF predicted achievement in Grade 5. These findings indicate the vital role of elementary schoolers' EF on academic achievement in Japan.
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Ren H, Hart CH, Cheah CSL, Porter CL, Nelson DA, Yavuz-Müren HM, Gao W, Haron F, Jiang L, Kawashima A, Shibazaki-Lau A, Nakazawa J, Nelson LJ, Robinson CC, Selçuk AB, Evans-Stout C, Tan JP, Yang C, Quek AH, Zhou N. Parenting measurement, normativeness, and associations with child outcomes: Comparing evidence from four non-Western cultures. Dev Sci 2023:e13388. [PMID: 36929667 DOI: 10.1111/desc.13388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 02/21/2023] [Accepted: 02/23/2023] [Indexed: 03/18/2023]
Abstract
This study compared parenting across four non-Western cultures to test cross-cultural commonality and specificity principles in three aspects: measurement properties, parenting normativeness, and their associations with child outcomes. Both mothers and fathers (N = 1509 dyads) with preschool-aged children (M = 5.00 years; 48% girls) from urban areas of four countries (Malaysia, N = 372; China, N = 441; Turkey, N = 402; and Japan, N = 294) reported on four parenting constructs (authoritative, authoritarian, group harmony socialization, and intrusive control) and their sub-dimensions using modified culturally relevant measures. Teachers reported on children's internalizing, externalizing, and prosocial behaviors. The commonality principle was supported by two sets of findings: (1) full measurement invariance was established for most parenting constructs and sub-dimensions, except that intrusive control only reached partial scalar invariance, and (2) no variations were found in associations between parenting and any child outcomes across cultures or parent gender at the construct level for all four parenting constructs and at the sub-dimensional level for authoritarian and intrusive control sub-dimensions. The specificity principle was supported by the other two sets of findings: (1) cross-cultural differences in parenting normativeness did not follow the pattern of economic development but yielded culture-specific patterns, and (2) at the sub-dimensional level, the authoritative parenting and group harmony socialization sub-dimensions were differently associated with child outcomes across cultures and/or parent gender. The findings suggested that examining specific dimensions rather than broad parenting constructs is necessary to reflect cultural specificities and nuances. Our study provided a culturally-invariant instrument and a three-step guide for future parenting research to examine cross-cultural commonalities/specificities. RESEARCH HIGHLIGHTS: This is the first study to use an instrument with measurement invariance across multiple non-Western cultures to examine the commonality and specificity principles in parenting. Measurement invariance was achieved across cultures for authoritative and authoritarian parenting, group harmony socialization, intrusive control, and their sub-dimensions, supporting the commonality principle. Cross-cultural differences in parenting normativeness did not follow the pattern of economic development but yielded culture-specific patterns, supporting the specificity principle. Both commonalities and specificities were manifested in associations between parenting and child outcomes across cultures.
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Affiliation(s)
- Huiguang Ren
- Department of Psychology, University of Maryland, Baltimore County, USA
| | - Craig H Hart
- School of Family Life, Brigham Young University, Provo, Utah, USA
| | | | - Chris L Porter
- School of Family Life, Brigham Young University, Provo, Utah, USA
| | - David A Nelson
- School of Family Life, Brigham Young University, Provo, Utah, USA
| | | | - Wen Gao
- School of Psychology, Liaoning Normal University, Dalian, China
| | - Fatimah Haron
- Department of Psychology, HELP University, Kuala Lumpur, Malaysia
| | - Liuqing Jiang
- Faculty of Psychology, Beijing Normal University, Beijing, China
| | | | - Ai Shibazaki-Lau
- School of Family Life, Brigham Young University, Provo, Utah, USA
| | | | - Larry J Nelson
- School of Family Life, Brigham Young University, Provo, Utah, USA
| | - Clyde C Robinson
- School of Family Life, Brigham Young University, Provo, Utah, USA
| | | | | | - Jo-Pei Tan
- Department of Human Development & Family Studies, Manchester Metropolitan University, Manchester, UK
| | - Chongming Yang
- College of Family, Home, and Social Sciences, Brigham Young University, Provo, Utah, USA
| | - Ai-Hwa Quek
- Department of Psychology, HELP University, Kuala Lumpur, Malaysia
| | - Nan Zhou
- Department of Early Childhood Education, Capital Normal University, Beijing, China
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Nishiura T, Ohta T, Ogura T, Nakazawa J, Okamura M, Hikichi S. The Conversion of Superoxide to Hydroperoxide on Cobalt(III) Depends on the Structural and Electronic Properties of Azole-Based Chelating Ligands. Molecules 2022; 27:molecules27196416. [PMID: 36234952 PMCID: PMC9571172 DOI: 10.3390/molecules27196416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/24/2022] [Accepted: 09/24/2022] [Indexed: 11/16/2022] Open
Abstract
Conversion from superoxide (O2−) to hydroperoxide (OOH−) on the metal center of oxygenases and oxidases is recognized to be a key step to generating an active species for substrate oxidation. In this study, reactivity of cobalt(III)-superoxido complexes supported by facially-capping tridentate tris(3,5-dimethyl-4-X-pyrazolyl)hydroborate ([HB(pzMe2,X)3]−; TpMe2,X) and bidentate bis(1-methyl-imidazolyl)methylborate ([B(ImN-Me)2Me(Y)]−; LY) ligands toward H-atom donating reagent (2-hydroxy-2-azaadamantane; AZADOL) has been explored. The oxygenation of the cobalt(II) precursors give the corresponding cobalt(III)-superoxido complexes, and the following reaction with AZADOL yield the hydroperoxido species as has been characterized by spectroscopy (UV-vis, resonance Raman, EPR). The reaction of the cobalt(III)-superoxido species and a reducing reagent ([CoII(C5H5)2]; cobaltocene) with proton (trifluoroacetic acid; TFA) also yields the corresponding cobalt(III)-hydroperoxido species. Kinetic analyses of the formation rates of the cobalt(III)-hydroperoxido complexes reveal that second-order rate constants depend on the structural and electronic properties of the cobalt-supporting chelating ligands. An electron-withdrawing ligand opposite to the superoxide accelerates the hydrogen atom transfer (HAT) reaction from AZADOL due to an increase in the electrophilicity of the superoxide ligand. Shielding the cobalt center by the alkyl group on the boron center of bis(imidazolyl)borate ligands hinders the approaching of AZADOL to the superoxide, although the steric effect is insignificant.
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Affiliation(s)
- Toshiki Nishiura
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Takehiro Ohta
- Department of Life Science, University of Hyogo, Ako-gun, Hyogo 678-1297, Japan
| | - Takashi Ogura
- Department of Life Science, University of Hyogo, Ako-gun, Hyogo 678-1297, Japan
| | - Jun Nakazawa
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Masaya Okamura
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Shiro Hikichi
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
- Correspondence: ; Tel.: +81-45-481-5661
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Imajima T, Shirakawa T, Shimokawa M, Otsuka T, Shibuki T, Nakazawa J, Arima S, Miwa K, Okabe Y, Koga F, Kubotsu Y, Ueda Y, Hosokawa A, Takeshita S, Shimokawa H, Komori A, Kawahira M, Oda H, Sakai K, Arita S, Mizuta T, Mitsugi K. P-113 A multicenter observational study of liposomal irinotecan and fluorouracil/leucovorin in patients with unresectable or recurrent pancreatic cancer (NAPOLEON-2): Retrospective part. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Fujimoto T, Ueda Y, Sugimoto H, Nakazawa J, Hikichi S, Itoh S. Alkane Oxidation with H2O2 Catalyzed by OsO4-carboxylate Adduct and Its Application to Heterogeneous Catalyst. CHEM LETT 2022. [DOI: 10.1246/cl.210751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tomohiro Fujimoto
- Department of Molecular Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka. Suita, Osaka 565-0871, Japan
| | - Yuta Ueda
- Department of Molecular Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka. Suita, Osaka 565-0871, Japan
| | - Hideki Sugimoto
- Department of Molecular Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka. Suita, Osaka 565-0871, Japan
| | - Jun Nakazawa
- Department of Material and Life Chemistry, Kanagawa University, 3-27-1 Rokkakubashi. Kanagawa-ku, Yokohama, Kanagawa 221-8686, Japan
| | - Shiro Hikichi
- Department of Material and Life Chemistry, Kanagawa University, 3-27-1 Rokkakubashi. Kanagawa-ku, Yokohama, Kanagawa 221-8686, Japan
| | - Shinobu Itoh
- Department of Molecular Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka. Suita, Osaka 565-0871, Japan
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Nakazawa J, Yamanaka S, Yoshida S, Yoshibayashi M, Yoshioka M, Ito T, Araki SI, Kume S, Maegawa H. A Long-term Estimated Glomerular Filtration Rate Plot Analysis Permits the Accurate Assessment of a Decline in the Renal Function by Minimizing the Influence of Estimated Glomerular Filtration Rate Fluctuations. Intern Med 2022; 61:1823-1833. [PMID: 35705311 PMCID: PMC9259813 DOI: 10.2169/internalmedicine.8298-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Objective Evaluating the rate of decline in the estimated glomerular filtration rate (eGFR) may help identify patients with occult chronic kidney disease (CKD). We herein report that eGFR fluctuation complicates the assessment of the rate of decline and propose a long-term eGFR plot analysis as a solution. Methods In 142 patients with persistent eGFR decline in a single hospital, we evaluated the factors influencing the rate of eGFR decline, calculated over the long term (≥3 years) and short term (<3 years) using eGFR plots, taking into account eGFR fluctuation between visits. Results The difference between the rate of eGFR decline calculated using short- and long-term plots increased as the time period considered in the short-term plots became shorter. A regression analysis revealed that eGFR fluctuation was the only factor that explained the difference and that the fluctuation exceeded the annual eGFR decline in all participants. Furthermore, the larger the eGFR fluctuation, the more difficult it became to detect eGFR decline using a short-term eGFR analysis. Obesity, a high eGFR at baseline, and faster eGFR decline were associated with larger eGFR fluctuations. To circumvent the issue of eGFR fluctuation in the assessment of the rate of eGFR decline, we developed a system that generates a long-term eGFR plot using all eGFR values for a participant, which enabled the detection of occult CKD, facilitating early therapeutic intervention. Conclusion The construction of long-term eGFR plots is useful for identifying patients with progressive eGFR decline, as it minimizes the effect of eGFR fluctuation.
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Affiliation(s)
- Jun Nakazawa
- Division of Nephrology, Department of Internal Medicine, Otsu City Hospital, Japan
- Department of Medicine, Shiga University of Medical Science, Japan
| | | | - Shohei Yoshida
- Division of Nephrology, Department of Internal Medicine, Otsu City Hospital, Japan
| | - Mamoru Yoshibayashi
- Division of Nephrology, Department of Internal Medicine, Otsu City Hospital, Japan
| | - Miho Yoshioka
- Division of Nephrology, Department of Internal Medicine, Otsu City Hospital, Japan
| | - Takamasa Ito
- Department of Infectious Diseases, Kyoto Prefectural University of Medicine, Japan
| | - Shin-Ichi Araki
- Department of Medicine, Shiga University of Medical Science, Japan
| | - Shinji Kume
- Department of Medicine, Shiga University of Medical Science, Japan
| | - Hiroshi Maegawa
- Department of Medicine, Shiga University of Medical Science, Japan
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Fujiwara Y, Takayama T, Nakazawa J, Okamura M, Hikichi S. Development of a novel scorpionate ligand with 6-methylpyridine and comparison of structural and electronic properties of nickel(II) complexes with related tris(azolyl)borates. Dalton Trans 2022; 51:10338-10342. [DOI: 10.1039/d2dt01548j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel anionic tridentate borate ligand with 6-methlpyridyl donor, TpyMe, has been synthesized. Comparison of molecular structures and reactivities of nickel(II)-bromido complexes with tris(azolyl)borate ligands composed of pyridyl, pyrazolyl, or...
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Nio K, Iguchi H, Shimokawa M, Shirakawa T, Koga F, Ueda Y, Nakazawa J, Komori A, Arima S, Fukahori M, Makiyama A, Taguchi H, Honda T, Shibuki T, Ide Y, Ureshino N, Mizuta T, Mitsugi K, Otsuka T. 192P A multicenter crossover analysis of first and second-line FOLFIRINOX or gemcitabine plus nab-paclitaxel administered to pancreatic cancer patients: Results from the NAPOLEON study. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Honda T, Takayuki O, Shimokawa M, Koga F, Ueda Y, Nakazawa J, Komori A, Arima S, Fukahori M, Makiyama A, Taguchi H, Shibuki T, Nio K, Ide Y, Ureshino N, Mitsugi K, Otsuka T, Shirakawa T. PD-5 Impact of biliary drainage for unresectable pancreatic cancer treated with FOLFIRINOX or gemcitabine plus nab-paclitaxel: Results from the NAPOLEON study. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Shibuki T, Mizuta T, Shimokawa M, Koga F, Ueda Y, Nakazawa J, Komori A, Arima S, Fukahori M, Makiyama A, Taguchi H, Honda T, Mitsugi K, Nio K, Ide Y, Ureshino N, Shirakawa T, Otsuka T. SO-1 Prognostic nomogram to predict overall survival in patients with unresectable pancreatic cancer treated with gemcitabine plus nab-paclitaxel or FOLFIRINOX: Real-world results from the multicenter retrospective study (NAPOLEON study). Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Shirakawa T, Ueda Y, Shimokawa M, Koga F, Nakazawa J, Komori A, Arima S, Fukahori M, Makiyama A, Taguchi H, Honda T, Uneda S, Yoshida M, Shibuki T, Nio K, Ide Y, Ureshino N, Mitsugi K, Otsuka T. P-88 A multicenter analysis of the correlation between overall survival and progression-free survival and the number of chemotherapeutic key drugs used in patients with advanced/unresectable pancreatic cancer: Results from the NAPOLEON study. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Terao I, Horii S, Nakazawa J, Okamura M, Hikichi S. Efficient alkane hydroxylation catalysis of nickel(ii) complexes with oxazoline donor containing tripodal tetradentate ligands. Dalton Trans 2020; 49:6108-6118. [PMID: 32323686 DOI: 10.1039/d0dt00733a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tris(oxazolynylmethyl)amine TOAR (where R denotes the substituent groups on the fourth position of the oxazoline rings) complexes of nickel(ii) have been synthesized as catalyst precursors for alkane oxidation with meta-chloroperoxybenzoic acid (m-CPBA). The molecular structures of acetato, nitrato, meta-chlorobenzoato and chlorido complexes with TOAMe2 have been determined using X-ray crystallography. The bulkiness of the substituent groups R affects the coordination environment of the nickel(ii) centers, as has been demonstrated by comparison of the molecular structures of chlorido complexes with TOAMe2 and TOAtBu. The nickel(ii)-acetato complex with TOAMe2 is an efficient catalyst precursor compared with the tris(pyridylmethyl)amine (TPA) analogue. Oxazolynyl donors' strong σ-electron donating ability will enhance the catalytic activity. Catalytic reaction rates and substrate oxidizing position selectivity are controlled by the structural properties of the R of TOAR. Reaction of the acetato complex with TOAMe2 and m-CPBA yields the corresponding acylperoxido species, which can be detected using spectroscopy. Kinetic studies of the decay process of the acylperoxido species suggest that the acylperoxido species is a precursor of an active species for alkane oxidation.
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Affiliation(s)
- Ikumi Terao
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
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Makiyama A, Nakazawa J, Otsuka T, Shimokawa M, Koga F, Ueda Y, Komori A, Arima S, Fukahori M, Honda T, Shibuki T, Shirakawa T, Nio K, Ide Y, Ureshino N, Mitsugi K. Prognostic impact of the C-reactive protein/albumin ratio in advanced pancreatic cancer treated with GEM plus nab-PTX or FOLFIRINOX: Based on the results of a multicenter retrospective study (the NAPOLEON study). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz422.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Nakazawa J, Otsuka T, Shimokawa M, Koga F, Ueda Y, Otsu S, Arima S, Fukahori M, Makiyama A, Taguchi H, Honda T, Shibuki T, Shirakawa T, Mitsugi K, Nio K, Ide Y, Ureshino N. A multicenter retrospective study of gemcitabine plus nab-paclitaxel or FOLFIRINOX in metastatic pancreatic cancer: NAPOLEON study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.064] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Nishiura T, Takabatake A, Okutsu M, Nakazawa J, Hikichi S. Heteroleptic cobalt(iii) acetylacetonato complexes with N-heterocyclic carbine-donating scorpionate ligands: synthesis, structural characterization and catalysis. Dalton Trans 2019; 48:2564-2568. [DOI: 10.1039/c8dt04469d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A first structure-determined heteroleptic cobalt(iii) complex with the less hindered tris(carbene)borate works as a catalyst precursor for alkane oxidation.
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Affiliation(s)
- Toshiki Nishiura
- Department of Material and Life Chemistry
- Faculty of Engineering
- Kanagawa University
- Yokohama 221-8686
- Japan
| | - Asako Takabatake
- Department of Material and Life Chemistry
- Faculty of Engineering
- Kanagawa University
- Yokohama 221-8686
- Japan
| | - Mariko Okutsu
- Department of Material and Life Chemistry
- Faculty of Engineering
- Kanagawa University
- Yokohama 221-8686
- Japan
| | - Jun Nakazawa
- Department of Material and Life Chemistry
- Faculty of Engineering
- Kanagawa University
- Yokohama 221-8686
- Japan
| | - Shiro Hikichi
- Department of Material and Life Chemistry
- Faculty of Engineering
- Kanagawa University
- Yokohama 221-8686
- Japan
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Nishiura T, Chiba Y, Nakazawa J, Hikichi S. Tuning the O2 Binding Affinity of Cobalt(II) Centers by Changing the Structural and Electronic Properties of the Distal Substituents on Azole-Based Chelating Ligands. Inorg Chem 2018; 57:14218-14229. [DOI: 10.1021/acs.inorgchem.8b02241] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Toshiki Nishiura
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Yosuke Chiba
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Jun Nakazawa
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Shiro Hikichi
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
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Nishiura T, Uramoto T, Takiyama Y, Nakazawa J, Hikichi S. Cobalt(II) Complexes with N, N, N-Scorpionates and Bidentate Ligands: Comparison of Hydrotris(3,5-dimethylpyrazol-1-yl)borate Tp* vs. Phenyltris(4,4-dimethyloxazolin-2-yl)borate To M to Control the Structural Properties and Reactivities of Cobalt Centers. Molecules 2018; 23:E1466. [PMID: 29914171 PMCID: PMC6099786 DOI: 10.3390/molecules23061466] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 06/13/2018] [Accepted: 06/15/2018] [Indexed: 11/16/2022] Open
Abstract
Scorpionate ligands Tp* (hydrotris(3,5-dimethylpyrazol-1-yl)borate) and ToM (tris(4,4-dimethyloxazolin-2-yl)phenylborate) complexes of cobalt(II) with bidentate ligands were synthesized. Both Tp* and ToM coordinate to cobalt(II) in a tridentate fashion when the bidentate ligand is the less hindered acetylacetonate. In crystal structures, the geometry of cobalt(II) supported by the N₃O₂ donor set in the Tp* complex is a square-pyramid, whereas that in the ToM complex is close to a trigonal-bipyramid. Both Tp*- and ToM-acac complexes exhibit solvatochromic behavior, although the changing structural equilibria of these complexes in MeCN are quite different. In the bis(1-methylimidazol-2-yl)methylphenylborate (LPh) complexes, Tp* retains the tridentate (к³) mode, whereas ToM functions as the bidentate (к²) ligand, giving the tetrahedral cobalt(II) complex. The bowl-shaped cavity derived from the six methyl groups on ToM lead to susceptibility to the bulkiness of the opposite bidentate ligand. The entitled scorpionate compounds mediate hydrocarbon oxidation with organic peroxides. Allylic oxidation of cyclohexene occurs mainly on the reaction with tert-butyl hydroperoxide (TBHP), although the catalytic efficiency of the scorpionate ligand complexes is lower than that of Co(OAc)₂ and Co(acac)₂. On cyclohexane oxidation with meta-chloroperbenzoic acid (mCPBA), both ToM and Tp* complexes function as catalysts for hydroxylation. The higher electron-donating ToM complexes show faster initial reaction rates compared to the corresponding Tp* complexes.
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Affiliation(s)
- Toshiki Nishiura
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Takahiro Uramoto
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Yuichiro Takiyama
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Jun Nakazawa
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Shiro Hikichi
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
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Nakamizu A, Kasai T, Nakazawa J, Hikichi S. Immobilization of a Boron Center-Functionalized Scorpionate Ligand on Mesoporous Silica Supports for Heterogeneous Tp-Based Catalysts. ACS Omega 2017; 2:1025-1030. [PMID: 31457483 PMCID: PMC6641073 DOI: 10.1021/acsomega.7b00022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 03/06/2017] [Indexed: 06/10/2023]
Abstract
To develop novel immobilized metallocomplex catalysts, allyltris(3-trifluoromethylpyrazol-1-yl)borate (allyl-TpCF3) was synthesized. A boron-attached allyl group reacts with thiol to afford the desired mesoporous silica-immobilized TpCF3. Cobalt(II) is an efficient probe for estimating the structures of the immobilized metallocomplexes. The structures of the formed cobalt(II) complexes and their catalytic activity depended on the density of the organic thiol groups and on the state of the remaining sulfur donors on the supports.
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Kuwagata S, Kume S, Chin-Kanasaki M, Araki H, Araki S, Nakazawa J, Sugaya T, Koya D, Haneda M, Maegawa H, Uzu T. MicroRNA148b-3p inhibits mTORC1-dependent apoptosis in diabetes by repressing TNFR2 in proximal tubular cells. Kidney Int 2016; 90:1211-1225. [DOI: 10.1016/j.kint.2016.06.036] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 06/26/2016] [Accepted: 06/30/2016] [Indexed: 11/24/2022]
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20
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Takayama T, Nakazawa J, Hikichi S. A pseudotetrahedral nickel(II) complex with a tridentate oxazoline-based scorpionate ligand: chlorido[tris(4,4-dimethyloxazolin-2-yl)phenylborato]nickel(II). Acta Crystallogr C Struct Chem 2016; 72:842-845. [PMID: 27811422 DOI: 10.1107/s2053229616012183] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 07/27/2016] [Indexed: 11/10/2022] Open
Abstract
Poly(pyrazol-1-yl)borates have been utilized extensively in coordination compounds due to their high affinity toward cationic metal ions on the basis of electrostatic interactions derived from the mononegatively charged boron centre. The original poly(pyrazol-1-yl)borates, christened `scorpionates', were pioneered by the late Professor Swiatoslaw Trofimenko and have expanded to include various borate ligands with N-, P-, O-, S-, Se- and C-donors. Scorpionate ligands with boron-carbon bonds, rather than the normal boron-nitrogen bonds, have been developed and in these new types of scorpionate ligands, amines and azoles, such as pyridines, imidazoles and oxazolines, have been employed as N-donors instead of pyrazoles. Furthermore, a variety of bis- and tris(oxazolinyl)borate ligands, including chiral ones, have been developed. Tris(oxazolin-2-yl)borates work as facially capping tridentate chelating ligands in the same way as tris(pyrazol-1-yl)borates. In the title compound, [Ni(C21H29BN3O3)Cl], the NiII ion is coordinated by three N atoms from the facially capping tridentate chelating tris(4,4-dimethyloxazolin-2-yl)phenylborate ligand and a chloride ligand in a highly distorted tetrahedral geometry. The Ni-Cl bond length [2.1851 (5) Å] is comparable to those found in a previously reported tris(3,5-dimethylpyrazol-1-yl)hydroborate derivative [2.1955 (18) and 2.150 (2) Å]. The molecular structure deviates from C3v symmetry due to the structural flexibility of the tris(4,4-dimethyloxazolin-2-yl)phenylborate ligand.
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Affiliation(s)
- Tomoaki Takayama
- Department of Material & Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama City 222-8686, Japan
| | - Jun Nakazawa
- Department of Material & Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama City 222-8686, Japan
| | - Shiro Hikichi
- Department of Material & Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama City 222-8686, Japan
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21
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Ando K, Nakazawa J, Hikichi S. Synthesis, Characterization and Aerobic Alcohol Oxidation Catalysis of Palladium(II) Complexes with a Bis(imidazolyl)borate Ligand. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600206] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kenta Ando
- Department of Material and Life ChemistryFaculty of EngineeringKanagawa University3‐27‐1 Rokkakubashi, Kanagawa‐ku221‐8686YokohamaJapan
| | - Jun Nakazawa
- Department of Material and Life ChemistryFaculty of EngineeringKanagawa University3‐27‐1 Rokkakubashi, Kanagawa‐ku221‐8686YokohamaJapan
| | - Shiro Hikichi
- Department of Material and Life ChemistryFaculty of EngineeringKanagawa University3‐27‐1 Rokkakubashi, Kanagawa‐ku221‐8686YokohamaJapan
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22
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Tagawa A, Yasuda M, Kume S, Yamahara K, Nakazawa J, Chin-Kanasaki M, Araki H, Araki SI, Koya D, Asanuma K, Kim EH, Haneda M, Kajiwara N, Hayashi K, Ohashi H, Ugi S, Maegawa H, Uzu T. Impaired Podocyte Autophagy Exacerbates Proteinuria in Diabetic Nephropathy. Diabetes 2016; 65:755-67. [PMID: 26384385 DOI: 10.2337/db15-0473] [Citation(s) in RCA: 221] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 09/14/2015] [Indexed: 11/13/2022]
Abstract
Overcoming refractory massive proteinuria remains a clinical and research issue in diabetic nephropathy. This study was designed to investigate the pathogenesis of massive proteinuria in diabetic nephropathy, with a special focus on podocyte autophagy, a system of intracellular degradation that maintains cell and organelle homeostasis, using human tissue samples and animal models. Insufficient podocyte autophagy was observed histologically in patients and rats with diabetes and massive proteinuria accompanied by podocyte loss, but not in those with no or minimal proteinuria. Podocyte-specific autophagy-deficient mice developed podocyte loss and massive proteinuria in a high-fat diet (HFD)-induced diabetic model for inducing minimal proteinuria. Interestingly, huge damaged lysosomes were found in the podocytes of diabetic rats with massive proteinuria and HFD-fed, podocyte-specific autophagy-deficient mice. Furthermore, stimulation of cultured podocytes with sera from patients and rats with diabetes and massive proteinuria impaired autophagy, resulting in lysosome dysfunction and apoptosis. These results suggest that autophagy plays a pivotal role in maintaining lysosome homeostasis in podocytes under diabetic conditions, and that its impairment is involved in the pathogenesis of podocyte loss, leading to massive proteinuria in diabetic nephropathy. These results may contribute to the development of a new therapeutic strategy for advanced diabetic nephropathy.
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MESH Headings
- Adult
- Aged
- Animals
- Apoptosis
- Autophagy
- Autophagy-Related Protein 5
- Autophagy-Related Protein 7
- Blotting, Western
- Cell Line
- Diabetes Mellitus, Experimental/complications
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Experimental/pathology
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/pathology
- Diabetic Nephropathies/etiology
- Diabetic Nephropathies/metabolism
- Diabetic Nephropathies/pathology
- Diet, High-Fat
- Female
- Humans
- Intracellular Signaling Peptides and Proteins/metabolism
- Intravital Microscopy
- Kidney/metabolism
- Kidney/pathology
- Lysosomes/metabolism
- Lysosomes/pathology
- Male
- Membrane Proteins/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Microfilament Proteins/metabolism
- Microscopy, Electron, Scanning
- Microscopy, Electron, Transmission
- Microtubule-Associated Proteins/genetics
- Middle Aged
- Podocytes/metabolism
- Proteinuria/etiology
- Proteinuria/metabolism
- Proteinuria/pathology
- RNA-Binding Proteins/blood
- Rats
- Rats, Long-Evans
- Severity of Illness Index
- Young Adult
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Affiliation(s)
- Atsuko Tagawa
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Mako Yasuda
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Shinji Kume
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Kosuke Yamahara
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Jun Nakazawa
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | | | - Hisazumi Araki
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Shin-Ichi Araki
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Daisuke Koya
- Division of Diabetology and Endocrinology, Kanazawa Medical University, Kahoku-gun, Ishikawa, Japan
| | - Katsuhiko Asanuma
- Laboratory for Kidney Research (TMK Project), Medical Innovation Center, Kyoto University Graduate School of Medicine, Sakyo-ku, Kyoto, Japan Division of Nephrology, Juntendo University Faculty of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Eun-Hee Kim
- Division of Nephrology, Juntendo University Faculty of Medicine, Bunkyo-ku, Tokyo, Japan Osong Medical Innovation Foundation, Laboratory Animal Center, Cheongwon-gun, Chungbuk, Republic of Korea
| | - Masakazu Haneda
- Division of Metabolism and Biosystemic Science, Department of Internal Medicine, Asahikawa Medical University, Hokkaido, Japan
| | | | - Kazuyuki Hayashi
- Department of Nephrology, Ikeda City Hospital, Ikeda, Osaka, Japan
| | - Hiroshi Ohashi
- Department of Pathology, Ikeda City Hospital, Ikeda, Osaka, Japan
| | - Satoshi Ugi
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Hiroshi Maegawa
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Takashi Uzu
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
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23
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Tanaka Y, Kume S, Araki H, Nakazawa J, Chin-Kanasaki M, Araki SI, Nakagawa F, Koya D, Haneda M, Maegawa H, Uzu T. 1-Methylnicotinamide ameliorates lipotoxicity-induced oxidative stress and cell death in kidney proximal tubular cells. Free Radic Biol Med 2015; 89:831-41. [PMID: 26482866 DOI: 10.1016/j.freeradbiomed.2015.10.414] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 10/07/2015] [Accepted: 10/14/2015] [Indexed: 11/18/2022]
Abstract
Free fatty acid-bound albumin (FFA-albumin)-related oxidative stress is involved in the pathogenesis of proximal tubular cell (PTC) damage and subsequent renal dysfunction in patients with refractory proteinuria. Nicotinamide adenine dinucleotide (NAD) metabolism has recently been focused on as a novel therapeutic target for several modern diseases, including diabetes. This study was designed to identify a novel molecule in NAD metabolism to protect PTCs from lipotoxicity-related oxidative stress. Among 19 candidate enzymes involved in mammalian NAD metabolism, the mRNA expression level of nicotinamide n-methyltransferase (NNMT) was significantly increased in both the kidneys of FFA-albumin-overloaded mice and cultured PTCs stimulated with palmitate-albumin. Knockdown of NNMT exacerbated palmitate-albumin-induced cell death in cultured PTCs, whereas overexpression of NNMT inhibited it. Intracellular concentration of 1-Methylnicotinamide (1-MNA), a metabolite of NNMT, increased and decreased in cultured NNMT-overexpressing and -knockdown PTCs, respectively. Treatment with 1-MNA inhibited palmitate-albumin-induced mitochondrial reactive oxygen species generation and cell death in cultured PTCs. Furthermore, oral administration of 1-MNA ameliorated oxidative stress, apoptosis, necrosis, inflammation, and fibrosis in the kidneys of FFA-albumin-overloaded mice. In conclusion, NNMT-derived 1-MNA can reduce lipotoxicity-mediated oxidative stress and cell damage in PTCs. Supplementation of 1-MNA may have potential as a new therapy in patients with refractory proteinuria.
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Affiliation(s)
- Yuki Tanaka
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Shinji Kume
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan.
| | - Hisazumi Araki
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Jun Nakazawa
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | | | - Shin-ichi Araki
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Fumiyuki Nakagawa
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan; Osaka Laboratory, CMIC Pharma Science Co., Ltd., Suita, Osaka, Japan
| | - Daisuke Koya
- Department of Diabetology and Endocrinology, Kanazawa Medical University, Kahoku-Gun, Ishikawa, Japan
| | - Masakazu Haneda
- Division of Metabolism and Biosystemic Science, Asahikawa Medical University, Asahikawa, Hokka ido, Japan
| | - Hiroshi Maegawa
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Takashi Uzu
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
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24
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Araki SI, Haneda M, Koya D, Kondo K, Tanaka S, Arima H, Kume S, Nakazawa J, Chin-Kanasaki M, Ugi S, Kawai H, Araki H, Uzu T, Maegawa H. Urinary Potassium Excretion and Renal and Cardiovascular Complications in Patients with Type 2 Diabetes and Normal Renal Function. Clin J Am Soc Nephrol 2015; 10:2152-8. [PMID: 26563378 DOI: 10.2215/cjn.00980115] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 08/18/2015] [Indexed: 01/15/2023]
Abstract
BACKGROUND AND OBJECTIVES We investigated the association of urinary potassium and sodium excretion with the incidence of renal failure and cardiovascular disease in patients with type 2 diabetes. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS A total of 623 Japanese type 2 diabetic patients with eGFR≥60 ml/min per 1.73 m(2) were enrolled in this observational follow-up study between 1996 and 2003 and followed-up until 2013. At baseline, a 24-hour urine sample was collected to estimate urinary potassium and sodium excretion. The primary end point was renal and cardiovascular events (RRT, myocardial infarction, angina pectoris, stroke, and peripheral vascular disease). The secondary renal end points were the incidence of a 50% decline in eGFR, progression to CKD stage 4 (eGFR<30 ml/min per 1.73 m(2)), and the annual decline rate in eGFR. RESULTS During the 11-year median follow-up period, 134 primary end points occurred. Higher urinary potassium excretion was associated with lower risk of the primary end point, whereas urinary sodium excretion was not. The adjusted hazard ratios for the primary end point in Cox proportional hazards analysis were 0.56 (95% confidence interval [95% CI], 0.33 to 0.95) in the third quartile of urinary potassium excretion (2.33-2.90 g/d) and 0.33 (95% CI, 0.18 to 0.62) in the fourth quartile (>2.90 g/d) compared with the lowest quartile (<1.72 g/d). Similar associations were observed for the secondary renal end points. The annual decline rate in eGFR in the fourth quartile of urinary potassium excretion (-1.3 ml/min per 1.73 m(2)/y; 95% CI, -1.5 to -1.0) was significantly slower than those in the first quartile (-2.2; 95% CI, -2.4 to -1.8). CONCLUSIONS Higher urinary potassium excretion was associated with the slower decline of renal function and the lower incidence of cardiovascular complications in type 2 diabetic patients with normal renal function. Interventional trials are necessary to determine whether increasing dietary potassium is beneficial.
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Affiliation(s)
| | - Masakazu Haneda
- Division of Metabolism and Biosystemic Science, Department of Medicine, Asahikawa Medical College, Asahikawa, Hokkaido, Japan; and
| | - Daisuke Koya
- Division of Endocrinology and Metabolism, Department of Medicine, Kanazawa Medical University, Kahoku-gun, Ishikawa, Japan
| | | | | | - Hisatomi Arima
- Center for Epidemiologic Research in Asia, Shiga University of Medical Science, Otsu, Shiga, Japan
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25
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Yasuda-Yamahara M, Kume S, Yamahara K, Nakazawa J, Chin-Kanasaki M, Araki H, Araki SI, Koya D, Haneda M, Ugi S, Maegawa H, Uzu T. Lamp-2 deficiency prevents high-fat diet-induced obese diabetes via enhancing energy expenditure. Biochem Biophys Res Commun 2015; 465:249-55. [DOI: 10.1016/j.bbrc.2015.08.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 08/03/2015] [Indexed: 12/01/2022]
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26
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Oddon F, Chiba Y, Nakazawa J, Ohta T, Ogura T, Hikichi S. Characterization of Mononuclear Non-heme Iron(III)-Superoxo Complex with a Five-Azole Ligand Set. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502367] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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27
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Oddon F, Chiba Y, Nakazawa J, Ohta T, Ogura T, Hikichi S. Characterization of Mononuclear Non-heme Iron(III)-Superoxo Complex with a Five-Azole Ligand Set. Angew Chem Int Ed Engl 2015; 54:7336-9. [DOI: 10.1002/anie.201502367] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Indexed: 12/25/2022]
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28
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Tsuruta T, Yamazaki T, Watanabe K, Chiba Y, Yoshida A, Naito S, Nakazawa J, Hikichi S. Mimicking the Active Sites of Non-heme Iron Oxygenases on the Solid Supports of Catalysts: Formation of Immobilized Iron Complexes with Imidazolyl and Carboxylate Ligands. CHEM LETT 2015. [DOI: 10.1246/cl.140937] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | | | - Kazuki Watanabe
- Department of Material and Life Chemistry, Kanagawa University
| | - Yosuke Chiba
- Department of Material and Life Chemistry, Kanagawa University
| | - Akihiro Yoshida
- Department of Material and Life Chemistry, Kanagawa University
| | - Shuichi Naito
- Department of Material and Life Chemistry, Kanagawa University
| | - Jun Nakazawa
- Department of Material and Life Chemistry, Kanagawa University
| | - Shiro Hikichi
- Department of Material and Life Chemistry, Kanagawa University
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29
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Araki H, Ono S, Nishizawa Y, Deji N, Nakazawa J, Morita Y, Kume S, Chin-Kanasaki M, Isshiki K, Araki SI, Arimura T, Maegawa H, Uzu T. Focal Segmental Glomerular Sclerosis Ameliorated by Long-term Hemodialysis Therapy with Low-density Lipoprotein Apheresis. Intern Med 2015; 54:2213-7. [PMID: 26328649 DOI: 10.2169/internalmedicine.54.4631] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We report a case involving a 43-year-old Japanese woman with steroid-resistant focal segmental glomerular sclerosis (FSGS) and severe renal dysfunction, which was ameliorated by low-density lipoprotein apheresis (LDL-A). She had been treated with steroid therapy, but had experienced anuria for over 10 weeks and required hemodialysis. She was then treated with LDL-A, which resulted in improved urinary protein excretion and renal function. Her renal function recovered after 97 days of hemodialysis therapy. This case suggests that LDL-A may represent an effective rescue treatment in patients with FSGS and long-term anuria.
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Affiliation(s)
- Hisazumi Araki
- Department of Medicine, Shiga University of Medical Science, Japan
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30
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Esposito G, Nakazawa J, Ogawa S, Stival R, Kawashima A, Putnick DL, Bornstein MH. Baby, you light-up my face: culture-general physiological responses to infants and culture-specific cognitive judgements of adults. PLoS One 2014; 9:e106705. [PMID: 25353362 PMCID: PMC4212966 DOI: 10.1371/journal.pone.0106705] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 07/31/2014] [Indexed: 11/18/2022] Open
Abstract
Infants universally elicit in adults a set of solicitous behaviors that are evolutionarily important for the survival of the species. However, exposure, experience, and prejudice appear to govern adults' social choice and ingroup attitudes towards other adults. In the current study, physiological arousal and behavioral judgments were assessed while adults processed unfamiliar infant and adult faces of ingroup vs. outgroup members in two contrasting cultures, Japan and Italy. Physiological arousal was investigated using the novel technique of infrared thermography and behavioral judgments using ratings. We uncovered a dissociation between physiological and behavioral responses. At the physiological level, both Japanese and Italian adults showed significant activation (increase of facial temperature) for both ingroup and outgroup infant faces. At the behavioral level, both Japanese and Italian adults showed significant preferences for ingroup adults. Arousal responses to infants appear to be mediated by the autonomic nervous system and are not dependent on direct caregiving exposure, but behavioral responses appear to be mediated by higher-order cognitive processing based on social acceptance and cultural exposure.
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Affiliation(s)
- Gianluca Esposito
- Department of Psychology and Cognitive Science, University of Trento, Rovereto, TN, Italy
- Division of Psychology, School of Humanities and Social Sciences, Nanyang Technological University, Singapore, Singapore
- * E-mail: (GE); (MHB)
| | - Jun Nakazawa
- Department of Developmental Science, Faculty of Education, Chiba University, Chiba, Japan
| | - Shota Ogawa
- United Graduate School of Education, Tokyo Gakugei University, Chiba, Japan
| | - Rita Stival
- Department of Psychology and Cognitive Science, University of Trento, Rovereto, TN, Italy
| | - Akiko Kawashima
- School of Social Welfare, Tokyo University of Social Welfare, Tokyo, Japan
| | - Diane L. Putnick
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Marc H. Bornstein
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail: (GE); (MHB)
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31
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Esposito G, Nakazawa J, Venuti P, Bornstein MH. Judgment of infant cry: The roles of acoustic characteristics and sociodemographic characteristics. Jpn Psychol Res 2014; 57:126-134. [PMID: 29681650 DOI: 10.1111/jpr.12072] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Adult judgments of infant cry are determined by both acoustic properties of the cry and listener sociodemographic characteristics. The main purpose of this research was to investigate how these two sources shape adult judgments of infant cry. We systematically manipulated both the acoustic properties of infant cries and contrasted listener sociodemographic characteristics. Then, we asked participants to listen to several acoustic manipulations of infant cries and to judge the level of distress the infant was expressing and the level of distress participants felt when listening. Finally, as a contrasting condition, participants estimated the age of the crying infant. Using tree-based models, we found that judgments of the level of distress the infant was expressing as well as the level of distress listeners felt are mainly accounted for by select acoustic properties of infant cry (proportion of sound/pause, fundamental frequency, and number of utterances), whereas age estimates of a crying infant are determined mainly by listener sociodemographic characteristics (gender and parental status). Implications for understanding infant cry and its effects as well as early caregiver-infant interactions are discussed.
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32
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Esposito G, Nakazawa J, Ogawa S, Stival R, Putnick DL, Bornstein MH. Using Infrared Thermography to Assess Emotional Responses to Infants. Early Child Dev Care 2014; 185:438-447. [PMID: 29527089 PMCID: PMC5844285 DOI: 10.1080/03004430.2014.932153] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Adult-infant interactions operate simultaneously across multiple domains and at multiple levels - from physiology to behavior. Unpackaging and understanding them, therefore, involves analysis of multiple data streams. In this study, we tested physiological responses and cognitive preferences for infant and adult faces in adult females and males. Infrared thermography was used to assess facial temperature changes as a measure of emotional valence, and we used a behavioral rating system to assess adults' expressed preferences. We found greater physiological activation in response to infant stimuli in females than males. As for cognitive preferences, we found greater responses to adult stimuli than to infant stimuli, both in males and females. The results are discuss in light of the Life History Theory. Finally, we discuss the importance of integrating the two data streams on our conclusions.
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Affiliation(s)
- Gianluca Esposito
- Department of Psychology and Cognitive Science, University of Trento, Italy
- RIKEN Brain Science Institute, Unit for Affiliative Social Behavior, Japan
| | - Jun Nakazawa
- Department of Developmental Science, Faculty of Education, Chiba University, Japan
| | - Shota Ogawa
- Department of Developmental Science, Faculty of Education, Chiba University, Japan
| | - Rita Stival
- Department of Psychology and Cognitive Science, University of Trento, Italy
| | - Diane L. Putnick
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, USA
| | - Marc H. Bornstein
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, USA
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Sugimoto T, Soumura M, Danno K, Kaji K, Kondo M, Hirata K, Nakazawa J, Uzu T, Nishio Y, Kashiwagi A. Scleroderma renal crisis in a patient with anticentromere antibody-positive limited cutaneous systemic sclerosis. Mod Rheumatol 2014. [DOI: 10.3109/s10165-006-0504-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Nakazawa J, Yata A, Hori T, Stack TDP, Naruta Y, Hikichi S. Catalytic Alkane Oxidation by Homogeneous and Silica-supported Cobalt(II) Complex Catalysts with a Triazolyl Group-containing Tetradentate Ligand. CHEM LETT 2013. [DOI: 10.1246/cl.130464] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jun Nakazawa
- Department of Material and Life Chemistry, Kanagawa University
| | - Akinori Yata
- Department of Material and Life Chemistry, Kanagawa University
| | - Tomoaki Hori
- Department of Material and Life Chemistry, Kanagawa University
| | | | - Yoshinori Naruta
- Institute for Materials Chemistry and Engineering, Kyushu University
| | - Shiro Hikichi
- Department of Material and Life Chemistry, Kanagawa University
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Hashimoto Y, Itagaki Y, Sugahara S, Niimi M, Nakazawa J, Takaya K, Ishii M, Kamiuchi K, Isono M. A case of diabetic ketoacidosis complicated by fatal acute abdominal aortic thrombosis. Diabetol Int 2013. [DOI: 10.1007/s13340-013-0115-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Esposito G, Nakazawa J, Venuti P, Bornstein MH. Componential deconstruction of infant distress vocalizations via tree-based models: a study of cry in autism spectrum disorder and typical development. Res Dev Disabil 2013; 34:2717-24. [PMID: 23774058 PMCID: PMC3741341 DOI: 10.1016/j.ridd.2013.05.036] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 05/15/2013] [Accepted: 05/21/2013] [Indexed: 05/31/2023]
Abstract
Understanding early episodes of cry is essential to improve caregiver-child interaction and child well-being. Caregiver perceptions of cry are based on interpretations of different acoustic characteristics of the cry, including the length of the pauses, the number of utterances, and the fundamental frequency. In this study, we used tree-based models to establish a hierarchy of effect in terms of how these acoustic characteristics influence perceptions of cries of children with autism compared to cries of typically developing children. In two studies, one in Italy and the other in Japan, we found that cries of children with autism are perceived more negatively. We also found that the length of the pauses, more than the number of utterances or fundamental frequency, determines listeners' negative perceptions. Implications for early caregiver-child interactions are discussed.
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Affiliation(s)
- Gianluca Esposito
- RIKEN Brain Science Institute, Unit for Affiliative Social Behavior, Japan.
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Nakazawa J, Terada S, Yamada M, Hikichi S. Structural Characterization and Oxidation Reactivity of a Nickel(II) Acylperoxo Complex. J Am Chem Soc 2013; 135:6010-3. [DOI: 10.1021/ja4020277] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jun Nakazawa
- Department of Material and Life
Chemistry, Kanagawa University, 3-27-1
Rokkakubashi, Kanagawa-ku,
Yokohama 221-8686, Japan
| | - Shota Terada
- Department of Material and Life
Chemistry, Kanagawa University, 3-27-1
Rokkakubashi, Kanagawa-ku,
Yokohama 221-8686, Japan
| | - Masaki Yamada
- Department of Material and Life
Chemistry, Kanagawa University, 3-27-1
Rokkakubashi, Kanagawa-ku,
Yokohama 221-8686, Japan
| | - Shiro Hikichi
- Department of Material and Life
Chemistry, Kanagawa University, 3-27-1
Rokkakubashi, Kanagawa-ku,
Yokohama 221-8686, Japan
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Nakazawa J, Hori T, Stack TDP, Hikichi S. Alkane Oxidation by an Immobilized Nickel Complex Catalyst: Structural and Reactivity Differences Induced by Surface-Ligand Density on Mesoporous Silica. Chem Asian J 2013; 8:1191-9. [DOI: 10.1002/asia.201300165] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Indexed: 11/06/2022]
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Komatsuzaki H, Shiota A, Hazawa S, Itoh M, Miyamura N, Miki N, Takano Y, Nakazawa J, Inagaki A, Akita M, Hikichi S. Manganese(II) semiquinonato and manganese(III) catecholato complexes with tridentate ligand: modeling the substrate-binding state of manganese-dependent catechol dioxygenase and reactivity with molecular oxygen. Chem Asian J 2013; 8:1115-9. [PMID: 23512755 DOI: 10.1002/asia.201300029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 02/19/2013] [Indexed: 11/06/2022]
Abstract
Catecholate catwalk: Monomeric manganese(III) catecholato and manganese(II) semiquinonato complexes as the substrate-binding model of catechol dioxygenase have been synthesized and structurally characterized. The semiquinonato complex reacted with molecular oxygen to give ring-cleaved products and benzoquinone in the catalytic condition.
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Affiliation(s)
- Hidehito Komatsuzaki
- Department of Chemistry and Material Engineering, Ibaraki National College of Technology, 866 Nakane, Hitachinaka, 312-8508, Japan.
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Affiliation(s)
| | | | - Yoshiko Mizuno
- Department of Adult Congenital Heart Disease, Chiba Cardiovascular Center
| | - Takeaki Shirai
- Department of Cardiology, Cardiovascular Center, St Luke’s International Hospital
| | | | - Koichiro Niwa
- Department of Cardiology, Cardiovascular Center, St Luke’s International Hospital
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Hikichi S, Hanaue K, Fujimura T, Okuda H, Nakazawa J, Ohzu Y, Kobayashi C, Akita M. Characterization of nickel(ii)-acylperoxo species relevant to catalytic alkanehydroxylation by nickel complex with mCPBA. Dalton Trans 2013; 42:3346-56. [DOI: 10.1039/c2dt32419a] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Ikeda A, Hoshino K, Komatsuzaki H, Satoh M, Nakazawa J, Hikichi S. O2 activation and external substrate oxidation capability of a Co(ii)–semiquinonato complex. NEW J CHEM 2013. [DOI: 10.1039/c3nj00215b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Nakazawa J, Hagiwara J, Shimazaki Y, Tani F, Naruta Y. Synthesis, Characterization, and Small Hydrocarbon Encapsulation of Dicavitand-Porphyrins. BCSJ 2012. [DOI: 10.1246/bcsj.20120107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jun Nakazawa
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University
| | - Jun Hagiwara
- Institute for Materials Chemistry and Engineering, Kyushu University
| | | | - Fumito Tani
- Institute for Materials Chemistry and Engineering, Kyushu University
| | - Yoshinori Naruta
- Institute for Materials Chemistry and Engineering, Kyushu University
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Esposito G, Nakazawa J, Venuti P, Bornstein MH. Perceptions of distress in young children with autism compared to typically developing children: a cultural comparison between Japan and Italy. Res Dev Disabil 2012; 33:1059-67. [PMID: 22502830 PMCID: PMC3328100 DOI: 10.1016/j.ridd.2012.01.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Revised: 01/25/2012] [Accepted: 01/25/2012] [Indexed: 05/14/2023]
Abstract
This study investigates how adults in two contrasting cultures (Italian and Japanese) perceive episodes of crying of typically developing (TD) children and children with Autism Disorder (AD). Although cries of children with AD have been reported to elicit more distress in Western cultures, it is not known whether similar findings hold in Eastern cultures. In Experiment 1, we artificially modified structural parameters (fundamental frequency, duration of pauses, waveform modulation) of cries and asked Italian and Japanese adults to judge levels of expressed and felt distress in the cries. In Experiment 2, we asked Italian and Japanese adults to report these levels of distress on hearing cries of AD and TD children. In both cultures, cries with higher fundamental frequency and shorter pause durations were judged more distressing and distressed and observers perceived cries of children with AD as more distressing and distressed than cries of TD children. The similar responses in adults from two contrasting societies constitute evidence that reactions to cries of children with AD might be universal.
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Affiliation(s)
- G Esposito
- Kuroda Research Unit for Affiliative Social Behavior, RIKEN Brain Science Institute, Japan.
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Ono H, Nishijima Y, Adachi N, Sakamoto M, Kudo Y, Nakazawa J, Kaneko K, Nakao A. Hydrogen(H2) treatment for acute erythymatous skin diseases. A report of 4 patients with safety data and a non-controlled feasibility study with H2 concentration measurement on two volunteers. Med Gas Res 2012; 2:14. [PMID: 22607973 PMCID: PMC3407032 DOI: 10.1186/2045-9912-2-14] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2011] [Accepted: 05/20/2012] [Indexed: 11/10/2022] Open
Abstract
Background We have treated 4 patients of acute erythematous skin diseases with fever and/or pain by H2 enriched intravenous fluid. We also added data from two volunteers for assessing the mode of H2 delivery to the skin for evaluation of feasibility of H2 treatment for this type of skin diseases. Methods All of the four patients received intravenous administration of 500 ml of H2 enriched fluid in 30 min for more than 3 days except in one patient for only once. From two volunteers (one for intravenous H2 administration and the other for H2 inhalation), blood samples were withdrawn serially and air samples were collected from a heavy duty plastic bag covering a leg, before, during and after H2 administration. These samples were checked for H2 concentration immediately by gas chromatography. Multiple physiological parameters and blood chemistry data were collected also. Results Erythema of these 4 patients and associated symptoms improved significantly after the H2 treatment and did not recur. Administration of H2 did not change physiological parameters and did not cause deterioration of the blood chemistry. The H2 concentration in the blood from the volunteers rapidly increased with H2 inhalation and slowly decreased with cessation of H2 particularly in the venous blood, while H2 concentration of the air from the surface of the leg showed much slower changes even after H2 inhalation was discontinued, at least during the time of sample collection. Conclusion An improvement in acute erythemtous skin diseases followed the administration of H2 enriched fluid without compromising the safety. The H2 delivery study of two volunteers suggested initial direct delivery and additional prolonged delivery possibly from a slowly desaturating reservoir in the skin to the surface.
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Affiliation(s)
- Hirohisa Ono
- Department of Neurosurgery, Nishijima Hospital, Numazu City, Sizuoka, Japan
| | - Yoji Nishijima
- Department of Neurosurgery, Nishijima Hospital, Numazu City, Sizuoka, Japan
| | - Naoto Adachi
- Department of Neurosurgery, Nishijima Hospital, Numazu City, Sizuoka, Japan
| | - Masaki Sakamoto
- Department of Neurosurgery, Nishijima Hospital, Numazu City, Sizuoka, Japan
| | - Yohei Kudo
- Department of Neurosurgery, Nishijima Hospital, Numazu City, Sizuoka, Japan
| | - Jun Nakazawa
- Department of Neurosurgery, Nishijima Hospital, Numazu City, Sizuoka, Japan
| | - Kumi Kaneko
- Department of Neurosurgery, Nishijima Hospital, Numazu City, Sizuoka, Japan
| | - Atsunori Nakao
- Department of Surgery, University of Pittsburgh, Pittsburg, USA
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Nakazawa J, Smith BJ, Stack TDP. Discrete complexes immobilized onto click-SBA-15 silica: controllable loadings and the impact of surface coverage on catalysis. J Am Chem Soc 2012; 134:2750-9. [PMID: 22277027 DOI: 10.1021/ja210400u] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Azidopropyl functionalized mesoporous silica SBA-15 were prepared with variable azide loadings of 0.03-0.7 mmol g(-1) (~2-50% of maximal surface coverage) through a direct synthesis, co-condensation approach. These materials are functionalized selectively with ethynylated organic moieties through a copper-catalyzed azide alkyne cycloaddition (CuAAC) or "click" reaction. Specific loading within a material can be regulated by either the azide loading or limiting the alkyne reagent relative to the azide loading. The immobilization of ferrocene, pyrene, tris(pyridylmethyl)amine (TPA), and iron porphyrin (FeTPP) demonstrates the robust nature and reproducibility of this two-step synthetic attachment strategy. Loading-sensitive pyrene fluorescence correlates with a theoretically random surface distribution, rather than a uniform one; site-isolation of tethered moieties ~15 Å in length occurs at loadings less than 0.02 mmol g(-1). The effect of surface loading on reactivity is observed in the oxygenation of SBA-15-[Cu(I)(TPA)]. SBA-15-[Mn(II)(TPA)]-catalyzed epoxidation exhibits a systematic dependence on surface loading. A comparison of homogeneous, site-isolated and site-dense complexes provides insight into catalyst speciation and ligand activity.
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Affiliation(s)
- Jun Nakazawa
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
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Nakazawa J, Ogiwara H, Kashiwazaki Y, Ishii A, Imamura N, Samejima Y, Hikichi S. Dioxygen activation and substrate oxygenation by a p-nitrothiophenolatonickel complex: unique effects of an acetonitrile solvent and the p-nitro group of the ligand. Inorg Chem 2011; 50:9933-5. [PMID: 21916455 DOI: 10.1021/ic201555f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The nickel(II) complex [Ni(Tp(Me2)) (SC(6)H(4)NO(2))] [1a; Tp(Me2) = hydrotris(3,5-dimethylpyrazol-1-yl)borate] reacts with O(2) to form the ligand oxygenation product ArSO(2)(-) in MeCN, and also 1a catalyzes the oxygenation of external substrates such as triphenylphosphine. The reactivity may correlate to the unique quinoid-like resonance structure of the thiophenolate ligand. The structure is stabilized by a p-nitro group and induced by coordination of MeCN.
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Affiliation(s)
- Jun Nakazawa
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama, 221-8686 Japan
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Ono H, Nishijima Y, Adachi N, Tachibana S, Chitoku S, Mukaihara S, Sakamoto M, Kudo Y, Nakazawa J, Kaneko K, Nawashiro H. Improved brain MRI indices in the acute brain stem infarct sites treated with hydroxyl radical scavengers, Edaravone and hydrogen, as compared to Edaravone alone. A non-controlled study. Med Gas Res 2011; 1:12. [PMID: 22146068 PMCID: PMC3231971 DOI: 10.1186/2045-9912-1-12] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Accepted: 06/07/2011] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND In acute stage of cerebral infarction, MRI indices (rDWI & rADC) deteriorate during the first 3-7 days after the ictus and then gradually normalize in approximately 10 days (pseudonormalization time), although the tissue is already infarcted. Since effective treatments improve these indices significantly and in less than the natural pseudonormalization time, a combined analysis of these changes provides an opportunity for objective evaluation on the effectiveness of various treatments for cerebral infarction. Hydroxyl radicals are highly destructive to the tissue and aggravate cerebral infarction. We treated brainstem infarction patients in acute stage with hydroxyl radical scavengers (Edaravone and hydrogen) by intravenous administration and evaluated the effects of the treatment by a serial observation and analysis of these MRI indices. The effects of the treatment were evaluated and compared in two groups, an Edaravone alone group and a combined group with Edaravone and hydrogen, in order to assess beneficial effects of addition of hydrogen. METHODS The patients were divided in Edaravone only group (E group. 26 patients) and combined treatment group with Edaravone and hydrogen enriched saline (EH group. 8 patients). The extent of the initial hump of rDWI, the initial dip of rADC and pseudo-normalization time were determined in each patient serially and averages of these data were compared in these two groups and also with the natural course in the literatures. RESULTS The initial hump of rDWI reached 2.0 in the E group which was better than 2.5 of the natural course but was not as good as 1.5 of the EH group. The initial dip of rADC was 0.6 in the E group which was close to the natural course but worse than 0.8 of the EH group. Pseudonormalization time of rDWI and rADC was 9 days only in EH group but longer in other groups. Addition of hydrogen caused no side effects. CONCLUSIONS Administration of hydroxyl radical scavengers in acute stage of brainstem infarction improved MRI indices against the natural course. The effects were more obvious and significant in the EH group. These findings may imply the need for more frequent daily administration of hydroxyl scavenger, or possible additional hydrogen effects on scavenger mechanisms.
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Affiliation(s)
- Hirohisa Ono
- Department of Neurosurgery, Nishijima Hospital, Oooka, Numazu City, Sizuoka, 410-0022, Japan
| | - Yoji Nishijima
- Department of Neurosurgery, Nishijima Hospital, Oooka, Numazu City, Sizuoka, 410-0022, Japan
| | - Naoto Adachi
- Department of Neurosurgery, Nishijima Hospital, Oooka, Numazu City, Sizuoka, 410-0022, Japan
| | - Shigekuni Tachibana
- Department of Neurosurgery, Nishijima Hospital, Oooka, Numazu City, Sizuoka, 410-0022, Japan
| | - Shiroh Chitoku
- Department of Neurosurgery, Nishijima Hospital, Oooka, Numazu City, Sizuoka, 410-0022, Japan
| | - Shigeo Mukaihara
- Department of Neurosurgery, Nishijima Hospital, Oooka, Numazu City, Sizuoka, 410-0022, Japan
| | - Masaki Sakamoto
- Department of Neurosurgery, Nishijima Hospital, Oooka, Numazu City, Sizuoka, 410-0022, Japan
| | - Yohei Kudo
- Department of Neurosurgery, Nishijima Hospital, Oooka, Numazu City, Sizuoka, 410-0022, Japan
| | - Jun Nakazawa
- Department of Neurosurgery, Nishijima Hospital, Oooka, Numazu City, Sizuoka, 410-0022, Japan
| | - Kumi Kaneko
- Department of Neurosurgery, Nishijima Hospital, Oooka, Numazu City, Sizuoka, 410-0022, Japan
| | - Hiroshi Nawashiro
- Department of Neurosurgery, National Defence Medical College, Tokorozawa City, Saitama,359-8513, Japan
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Hikichi S, Fujita K, Manabe Y, Akita M, Nakazawa J, Komatsuzaki H. Coordination Properties of Organoborate Ligands - Steric Hindrance Around the Distal Boron Center Directs the Conformation of the Dialkylbis(imidazolyl)borate Scaffold. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000629] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Nakazawa J, Isshiki K, Sugimoto T, Araki SI, Kume S, Yokomaku Y, Chin-Kanasaki M, Sakaguchi M, Koya D, Haneda M, Kashiwagi A, Uzu T. Renoprotective effects of asialoerythropoietin in diabetic mice against ischaemia-reperfusion-induced acute kidney injury. Nephrology (Carlton) 2010; 15:93-101. [PMID: 20377776 DOI: 10.1111/j.1440-1797.2009.01170.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
AIM Diabetic patients are at higher risk of failure to recover after acute kidney injury, however, the mechanism and therapeutic strategies remain unclear. Erythropoietin is cytoprotective in a variety of non-haematopoietic cells. The aim of the present study was to clarify the mechanism of diabetes-related acceleration of renal damage after ischaemia-reperfusion injury and to examine the therapeutic potential of asialoerythropoietin, a non-haematopoietic erythropoietin derivative, against ischaemia-reperfusion-induced acute kidney injury in diabetic mice. METHODS C57BL/6J mice with and without streptozotocin-induced diabetes were subjected to 30 min unilateral renal ischaemia-reperfusion injury at 1 week after induction of diabetes. They were divided into four group: (i) non-diabetic plus ischaemia-reperfusion injury; (ii) non-diabetic plus ischaemia-reperfusion injury plus asialoerythropoietin (3000 IU/kg bodyweight); (iii) diabetic plus ischaemia-reperfusion injury; and (iv) diabetic plus ischemia-reperfusion injury plus asialoerythropoietin. Experiments were conducted at the indicated time periods after ischaemia-reperfusion injury. RESULTS Ischaemia-reperfusion injury of diabetic kidney resulted in significantly low protein expression levels of bcl-2, an anti-apoptotic molecule, and bone morphogenetic protein-7 (BMP-7), an anti-fibrotic and pro-regenerative factor, compared with non-diabetic kidneys. Diabetic kidney subsequently showed severe damage including increased tubular cell apoptosis, tubulointerstitial fibrosis and decreased tubular proliferation, compared with non-diabetic kidney. Treatment with asialoerythropoietin induced bcl-2 and BMP-7 expression in diabetic kidney and decreased tubular cell apoptosis, tubulointerstitial fibrosis and accelerated tubular proliferation. CONCLUSION Reduced induction bcl-2 and BMP-7 may play a role in the acceleration of renal damage after ischaemia-reperfusion injury in diabetic kidney. The renoprotective effects of asialoerythropoietin on acute kidney injury may be mediated through the induction of bcl-2 and BMP-7.
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Affiliation(s)
- Jun Nakazawa
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
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