1
|
Takikawa H, Nishii A, Takiguchi H, Yagishita H, Tanaka M, Hirano K, Uchiyama M, Ohmori K, Suzuki K. Intramolecular Benzyne–Phenolate [4+2] Cycloadditions. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hiroshi Takikawa
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
- Present address: Graduate School of Pharmaceutical Sciences Kyoto University Yoshida, Sakyo-ku Kyoto 606-8501 Japan
| | - Arata Nishii
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Hiromu Takiguchi
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Hirotoshi Yagishita
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Masato Tanaka
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Keiichi Hirano
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
- Cluster of Pioneering Research (CPR) Advanced Elements Chemistry Laboratory RIKEN 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan
| | - Ken Ohmori
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Keisuke Suzuki
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| |
Collapse
|
2
|
Takikawa H, Nishii A, Takiguchi H, Yagishita H, Tanaka M, Hirano K, Uchiyama M, Ohmori K, Suzuki K. Intramolecular Benzyne–Phenolate [4+2] Cycloadditions. Angew Chem Int Ed Engl 2020; 59:12440-12444. [DOI: 10.1002/anie.202003131] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Hiroshi Takikawa
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
- Present address: Graduate School of Pharmaceutical Sciences Kyoto University Yoshida, Sakyo-ku Kyoto 606-8501 Japan
| | - Arata Nishii
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Hiromu Takiguchi
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Hirotoshi Yagishita
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Masato Tanaka
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Keiichi Hirano
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
- Cluster of Pioneering Research (CPR) Advanced Elements Chemistry Laboratory RIKEN 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan
| | - Ken Ohmori
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Keisuke Suzuki
- Department of Chemistry Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| |
Collapse
|
3
|
Nishii A, Takikawa H, Suzuki K. 2-Bromo-6-(chlorodiisopropylsilyl)phenyl tosylate as an efficient platform for intramolecular benzyne-diene [4 + 2] cycloaddition. Chem Sci 2019; 10:3840-3845. [PMID: 31015926 PMCID: PMC6461022 DOI: 10.1039/c8sc05518a] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 12/13/2018] [Accepted: 02/20/2019] [Indexed: 01/27/2023] Open
Abstract
An intramolecular benzyne–diene [4 + 2] cycloaddition with broad substrate scope has been realized by using a cleavable silicon tether, allowing access to various polycyclic structures.
An intramolecular benzyne–diene [4 + 2] cycloaddition with broad substrate scope has been realized by using a cleavable silicon tether, allowing access to various polycyclic structures. 2-Bromo-6-(chlorodiisopropylsilyl)phenyl tosylate serves as an efficient platform for (1) rapid attachment of various arynophiles to the benzyne precursor via a Si–O bond and (2) facile generation of benzyne via halogen–metal exchange with Ph3MgLi.
Collapse
Affiliation(s)
- Arata Nishii
- Department of Chemistry , Tokyo Institute of Technology , 2-12-1 O-okayama, Meguro-ku , Tokyo 152-8551 , Japan .
| | - Hiroshi Takikawa
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku , Kyoto 606-8501 , Japan
| | - Keisuke Suzuki
- Department of Chemistry , Tokyo Institute of Technology , 2-12-1 O-okayama, Meguro-ku , Tokyo 152-8551 , Japan .
| |
Collapse
|
4
|
Abstract
This review has outlined the strategies and tactics of using arynes in the total syntheses of polycyclic natural products.
Collapse
Affiliation(s)
- Hiroshi Takikawa
- Graduate School of Pharmaceutical Sciences
- Kyoto University
- Kyoto 606-8501
- Japan
| | - Arata Nishii
- Department of Chemistry
- Tokyo Institute of Technology
- Tokyo 152-8551
- Japan
| | - Takahiro Sakai
- Department of Chemistry
- Tokyo Institute of Technology
- Tokyo 152-8551
- Japan
| | - Keisuke Suzuki
- Department of Chemistry
- Tokyo Institute of Technology
- Tokyo 152-8551
- Japan
| |
Collapse
|
5
|
Ihara K, Fukano C, Ayabe T, Fukami M, Ogata T, Kawamura T, Urakami T, Kikuchi N, Yokota I, Takemoto K, Mukai T, Nishii A, Kikuchi T, Mori T, Shimura N, Sasaki G, Kizu R, Takubo N, Soneda S, Fujisawa T, Takaya R, Kizaki Z, Kanzaki S, Hanaki K, Matsuura N, Kasahara Y, Kosaka K, Takahashi T, Minamitani K, Matsuo S, Mochizuki H, Kobayashi K, Koike A, Horikawa R, Teno S, Tsubouchi K, Mochizuki T, Igarashi Y, Amemiya S, Sugihara S. FUT2 non-secretor status is associated with Type 1 diabetes susceptibility in Japanese children. Diabet Med 2017; 34:586-589. [PMID: 27859559 DOI: 10.1111/dme.13288] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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] [Accepted: 11/15/2016] [Indexed: 01/04/2023]
Abstract
AIM To examine the contribution of the FUT2 gene and ABO blood type to the development of Type 1 diabetes in Japanese children. METHODS We analysed FUT2 variants and ABO genotypes in a total of 531 Japanese children diagnosed with Type 1 diabetes and 448 control subjects. The possible association of FUT2 variants and ABO genotypes with the onset of Type 1 diabetes was statistically examined. RESULTS The se2 genotype (c.385A>T) of the FUT2 gene was found to confer susceptibility to Type 1A diabetes in a recessive effects model [odds ratio for se2/se2, 1.68 (95% CI 1.20-2.35); corrected P value = 0.0075]. CONCLUSIONS The FUT2 gene contributed to the development of Type 1 diabetes in the present cohort of Japanese children.
Collapse
Affiliation(s)
- K Ihara
- Department of Paediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Paediatrics, Oita University School of Medicine, Yufu, Japan
| | - C Fukano
- Department of Paediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - T Ayabe
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - M Fukami
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - T Ogata
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
- Department of Paediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - T Kawamura
- Department of Paediatrics, Osaka City University Hospital, Osaka, Japan
| | - T Urakami
- Department of Paediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
| | - N Kikuchi
- Department of Paediatrics, Yokohama City Minato Red Cross Hospital, Yokohama, Japan
| | - I Yokota
- Department of Clinical Laboratory, Shikoku Medical Center for Children and Adults, Zentsuji, Japan
- Department of Paediatrics, Graduate School of Medical Sciences Tokushima University, Tokushima, Japan
| | - K Takemoto
- Department of Paediatrics, Ehime University Hospital, Toon, Japan
- Department of Paediatrics, Sumitomo Besshi Hospital, Niihama, Japan
| | - T Mukai
- Department of Paediatrics, Asahikawa Medical University Hospital, Asahikawa, Japan
- Department of Paediatrics, Asahikawa-Kosei General Hospital, Asahikawa, Japan
| | - A Nishii
- Department of Paediatrics, JR Sendai Hospital, Sendai, Japan
| | - T Kikuchi
- Department of Paediatrics, Saitama Medical University Hospital, Saitama, Japan
- Department of Paediatrics, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - T Mori
- Department of Paediatrics, Nagano Red Cross Hospital, Nagano, Japan
- Department of Paediatrics, Shinshu Ueda Medical Centre, Ueda, Japan
| | - N Shimura
- Department of Paediatrics, Dokkyo Medical University Hospital, Shimotsuga, Japan
| | - G Sasaki
- Department of Paediatrics, Tokyo Dental College Ichikawa General Hospital, Ichikawa, Japan
| | - R Kizu
- Department of Paediatrics, Yokosuka Kyosai Hospital, Yokosuka, Japan
| | - N Takubo
- Department of Pediatrics, Kitasato University Hospital, Sagamihara, Japan
- Department of Paediatrics and Adolescent Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - S Soneda
- Department of Paediatrics, St Marianna University School of Medicine, Kawasaki, Japan
| | - T Fujisawa
- Department of Paediatrics, National Mie Hospital, Tsu, Japan
| | - R Takaya
- Department of Paediatrics, Osaka Medical College, Takatsuki, Japan
| | - Z Kizaki
- Department of Paediatrics, Japanese Red Cross Kyoto Daiichi Hospital, Kyoto, Japan
| | - S Kanzaki
- Department of Paediatrics, Tottori University Faculty of Medicine, Yonago, Japan
| | - K Hanaki
- Department of Paediatrics, Tottori Prefectural Kousei Hospital, Kurayoshi, Japan
| | - N Matsuura
- Department of Paediatrics, Teine Keijinkai Hospital, Sapporo, Japan
- Department of Early Childhood Care and Education, Seitoku University Junior College, Matsudo, Japan
| | - Y Kasahara
- Department of Paediatrics, Kanazawa University, Kanazawa, Japan
| | - K Kosaka
- Department of Paediatrics, University Hospital, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | | | - K Minamitani
- Department of Paediatrics, Teikyo University Chiba Medical Center, Ichihara, Japan
| | - S Matsuo
- Matsuo Kodomo Clinic, Kyoto, Japan
| | - H Mochizuki
- Department of Metabolism and Endocrinology, Saitama Children's Medical Centre, Saitama, Japan
| | - K Kobayashi
- Department of Paediatrics, University of Yamanashi Hospital, Chuo, Japan
| | - A Koike
- Miyanosawa Koike Child Clinic, Sapporo, Japan
| | - R Horikawa
- Division of Endocrinology and Metabolism, Department of Medical Subspecialties, National Medical Centre for Children and Mothers, Tokyo, Japan
| | - S Teno
- Teno Clinic, Izumo, Japan
| | - K Tsubouchi
- Department of Paediatrics, Chuno Kosei Hospital, Seki, Japan
| | - T Mochizuki
- Department of Paediatrics, Osaka City General Hospital, Osaka, Japan
- Department of Paediatrics, Osaka Police Hospital, Osaka, Japan
| | - Y Igarashi
- Igarashi Children's Clinic, Sendai, Japan
| | - S Amemiya
- Department of Paediatrics, Saitama Medical University Hospital, Saitama, Japan
| | - S Sugihara
- Department of Paediatrics, Tokyo Women's Medical University Medical Centre East, Tokyo, Japan
| |
Collapse
|
6
|
Ayabe T, Fukami M, Ogata T, Kawamura T, Urakami T, Kikuchi N, Yokota I, Ihara K, Takemoto K, Mukai T, Nishii A, Kikuchi T, Mori T, Shimura N, Sasaki G, Kizu R, Takubo N, Soneda S, Fujisawa T, Takaya R, Kizaki Z, Kanzaki S, Hanaki K, Matsuura N, Kasahara Y, Kosaka K, Takahashi T, Minamitani K, Matsuo S, Mochizuki H, Kobayashi K, Koike A, Horikawa R, Teno S, Tsubouchi K, Mochizuki T, Igarashi Y, Amemiya S, Sugihara S. Variants associated with autoimmune Type 1 diabetes in Japanese children: implications for age-specific effects of cis-regulatory haplotypes at 17q12-q21. Diabet Med 2016; 33:1717-1722. [PMID: 27352912 DOI: 10.1111/dme.13175] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 02/16/2016] [Revised: 05/08/2016] [Accepted: 06/27/2016] [Indexed: 12/11/2022]
Abstract
AIMS The aim of this study was to clarify the significance of previously reported susceptibility variants in the development of autoimmune Type 1 diabetes in non-white children. Tested variants included rs2290400, which has been linked to Type 1 diabetes only in one study on white people. Haplotypes at 17q12-q21 encompassing rs2290400 are known to determine the susceptibility of early-onset asthma by affecting the expression of flanking genes. METHODS We genotyped 63 variants in 428 Japanese people with childhood-onset autoimmune Type 1 diabetes and 457 individuals without diabetes. Possible association between variants and age at diabetes onset was examined using age-specific quantitative trait locus analysis and ordered-subset regression analysis. RESULTS Ten variants, including rs2290400 in GSDMB, were more frequent among the people with Type 1 diabetes than those without diabetes. Of these, rs689 in INS and rs231775 in CTLA4 yielded particularly high odds ratios of 5.58 (corrected P value 0.001; 95% CI 2.15-14.47) and 1.64 (corrected P value 5.3 × 10-5 ; 95% CI 1.34-2.01), respectively. Age-specific effects on diabetes susceptibility were suggested for rs2290400; heterozygosity of the risk alleles was associated with relatively early onset of diabetes, and the allele was linked to the phenotype exclusively in the subgroup of age at onset ≤ 5.0 years. CONCLUSIONS The results indicate that rs2290400 in GSDMB and polymorphisms in INS and CTLA4 are associated with the risk of Type 1 diabetes in Japanese children. Importantly, cis-regulatory haplotypes at 17q12-q21 encompassing rs2290400 probably determine the risk of autoimmune Type 1 diabetes predominantly in early childhood.
Collapse
Affiliation(s)
- T Ayabe
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - M Fukami
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - T Ogata
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
- Department of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - T Kawamura
- Department of Pediatrics, Osaka City University Hospital, Osaka, Japan
| | - T Urakami
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
| | - N Kikuchi
- Department of Pediatrics, Yokohama City Minato Red Cross Hospital, Yokohama, Japan
| | - I Yokota
- Department of Clinical Laboratory, Shikoku Medical Center for Children and Adults, Zentsuji, Japan
- Department of Pediatrics, Graduate School of Medical Sciences Tokushima University, Tokushima, Japan
| | - K Ihara
- Department of Pediatrics, Kyushu University Hospital, Fukuoka, Japan
- Department of Pediatrics, Oita University Hospital, Yufu, Japan
| | - K Takemoto
- Department of Pediatrics, Ehime University Hospital, Toon, Japan
- Department of Pediatrics, Sumitomo Besshi Hospital, Niihama, Japan
| | - T Mukai
- Department of Pediatrics, Asahikawa Medical University Hospital, Asahikawa, Japan
- Department of Pediatrics, Asahikawa-Kosei General Hospital, Asahikawa, Japan
| | - A Nishii
- Department of Pediatrics, JR Sendai Hospital, Sendai, Japan
| | - T Kikuchi
- Department of Pediatrics, Saitama Medical University Hospital, Saitama, Japan
- Department of Pediatrics, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - T Mori
- Department of Pediatrics, Nagano Red Cross Hospital, Nagano, Japan
- Department of Pediatrics, Shinshu Ueda Medical Center, Ueda, Japan
| | - N Shimura
- Department of Pediatrics, Dokkyo Medical University Hospital, Shimotsuga, Japan
| | - G Sasaki
- Department of Pediatrics, Tokyo Dental College Ichikawa General Hospital, Ichikawa, Japan
| | - R Kizu
- Department of Pediatrics, Yokosuka Kyosai Hospital, Yokosuka, Japan
| | - N Takubo
- Department of Pediatrics, Kitasato University Hospital, Sagamihara, Japan
- Department of Pediatrics and Adolescent Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - S Soneda
- Department of Pediatrics, St. Marianna University School of Medicine, Kawasaki, Japan
| | - T Fujisawa
- Department of Pediatrics, National Mie Hospital, Tsu, Japan
| | - R Takaya
- Department of Pediatrics, Osaka Medical College, Takatsuki, Japan
| | - Z Kizaki
- Department of Pediatrics, Japanese Red Cross Kyoto Daiichi Hospital, Kyoto, Japan
| | - S Kanzaki
- Department of Pediatrics, Tottori University Faculty of Medicine, Yonago, Japan
| | - K Hanaki
- Department of Pediatrics, Tottori Prefectural Kousei Hospital, Kurayoshi, Japan
| | - N Matsuura
- Department of Pediatrics, Teine Keijinkai Hospital, Sapporo, Japan
- Department of Early Childhood Care and Education, Seitoku University Junior College, Matsudo, Japan
| | - Y Kasahara
- Department of Pediatrics, Kanazawa University, Kanazawa, Japan
| | - K Kosaka
- Department of Pediatrics, University Hospital, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | | | - K Minamitani
- Department of Pediatrics, Teikyo University Chiba Medical Center, Ichihara, Japan
| | - S Matsuo
- Matsuo Kodomo Clinic, Kyoto, Japan
| | - H Mochizuki
- Department of Metabolism and Endocrinology, Saitama Children's Medical Center, Saitama, Japan
| | - K Kobayashi
- Department of Pediatrics, University of Yamanashi Hospital, Chuo, Japan
| | - A Koike
- Miyanosawa Koike Child Clinic, Sapporo, Japan
| | - R Horikawa
- Division of Endocrinology and Metabolism, Department of Medical Subspecialties, National Medical Center for Children and Mothers, Tokyo, Japan
| | - S Teno
- Teno Clinic, Izumo, Japan
| | - K Tsubouchi
- Department of Pediatrics, Chuno Kosei Hospital, Seki, Japan
| | - T Mochizuki
- Department of Pediatrics, Osaka City General Hospital, Osaka, Japan
- Department of Pediatrics, Osaka Police Hospital, Osaka, Japan
| | - Y Igarashi
- Igarashi Children's Clinic, Sendai, Japan
| | - S Amemiya
- Department of Pediatrics, Saitama Medical University Hospital, Saitama, Japan
| | - S Sugihara
- Department of Pediatrics, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| |
Collapse
|
7
|
Takikawa H, Nishii A, Suzuki K. Synthesis of β-Hydroxynaphthoate Derivatives from Ketodioxinones via Benzyne Acyl-Alkylation and Aldol Condensation Cascade. SYNTHESIS-STUTTGART 2016. [DOI: 10.1055/s-0035-1562514] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A variety of highly functionalized β-hydroxynaphthoate derivatives are prepared by a two-step protocol: (1) acyl-alkylation of benzynes with ketodioxinones and (2) intramolecular aldol condensation. The substitution pattern of the products is related to polycyclic natural products derived from the type-II polyketide biosynthesis.
Collapse
Affiliation(s)
| | - Arata Nishii
- Department of Chemistry, Tokyo Institute of Technology
| | | |
Collapse
|
8
|
Yoneyama Y, Nishii A, Nishimoto M, Yamada N, Suzuki T. Upflow anaerobic sludge blanket (UASB) treatment of supernatant of cow manure by thermal pre-treatment. Water Sci Technol 2006; 54:221-7. [PMID: 17163060 DOI: 10.2166/wst.2006.794] [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] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Upflow anaerobic sludge blanket (UASB) methane fermentation treatment of cow manure that was subjected to screw pressing, thermal treatment and subsequent solid-liquid separation was studied. Conducting batch scale tests at temperatures between 140 and 180 degrees C, the optimal temperature for sludge settling and the color suppression was found to be between 160-170 degrees C. UASB treatment was carried out with a supernatant obtained from the thermal treatment at the optimal conditions (170 degrees C for 30 minutes) and polymer-dosed solid-liquid separation. In the UASB treatment with a COD(Cr) loading of 11.7 kg/m3/d and water temperature of 32.2 degrees C, the COD(Cr) level dropped from 16,360 mg/L in raw water to 3,940 mg/L in treated water (COD(Cr), removal rate of 75.9%), and the methane production rate per COD(Cr) was 0.187 Nm3/kg. Using wastewater thermal-treated at the optimal conditions, also a methane fermentation treatment with a continuously stirred tank reactor (CSTR) was conducted (COD(Cr) in raw water: 38,000 mg/L, hydraulic retention time (HRT): 20 days, 35 degrees C). At the COD(Cr) loading of 1.9 kg/m3/d, the methane production rate per COD(Cr), was 0.153 Nm3/kg. This result shows that UASB treatment using thermal pre-treatment provides a COD(Cr), loading of four times or more and a methane production rate of 1.3 times higher than the CSTR treatment.
Collapse
Affiliation(s)
- Y Yoneyama
- Environmental Engineering Company, Ebara Corporation, 4-2-1 Honfujisawa, Fujisawa-shi, Kanagawa 251-8502, Japan
| | | | | | | | | |
Collapse
|
9
|
Nishii A, Takemura M, Fujita H, Shikata M, Yokota A, Kohchi T. Characterization of a novel gene encoding a putative single zinc-finger protein, ZIM, expressed during the reproductive phase in Arabidopsis thaliana. Biosci Biotechnol Biochem 2000; 64:1402-9. [PMID: 10945256 DOI: 10.1271/bbb.64.1402] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
By differential screening of an arrayed normalized cDNA library from the inflorescence apex in Arabidopsis, a cDNA clone having a deduced amino acid sequence with a motif for a zinc finger was isolated as one of the genes expressed specifically in the reproductive phase. The deduced protein has a modular structure with a putative single C2-C2 zinc-finger motif distantly related to a GATA-1-type finger, a basic region with a sequence resembling a nuclear localization signal, and an acidic region. The gene seemed to have been formed by the exon-shuffling during its molecular evolution, since individual domains are encoded by discrete exons. RNA gel blot analysis showed its expression in shoot apex and flowers in the reproductive phase. The gene was named ZIM for Zinc-finger protein expressed in Inflorescence Meristem. The nuclear localization of ZIM was detected using GFP as a reporter. These results suggest that ZIM is a putative transcription factor involved in inflorescence and flower development.
Collapse
Affiliation(s)
- A Nishii
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, Ikoma, Japan
| | | | | | | | | | | |
Collapse
|
10
|
Takemura M, Fujishige K, Hyodo H, Ohashi Y, Kami C, Nishii A, Ohyama K, Kohchi T. Systematic isolation of genes expressed at low levels in inflorescence apices of Arabidopsis thaliana. DNA Res 1999; 6:275-82. [PMID: 10574453 DOI: 10.1093/dnares/6.5.275] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We constructed an equalized cDNA library from Arabidopsis inflorescence shoot apices including inflorescence meristem, floral meristem and flower tissue collected before stage 5 of flower development. The cDNA clones were arrayed on membranes and were differentially screened using cDNA pools from vegetative and inflorescence tissues as probes. Each clone was classified by expression specificity and expression level. By removing the clones that displayed hybridization signals, 384 out of 3264 clones in this library remained as candidates for inflorescence-specific mRNAs expressed at low levels. Sequence analysis of all selected clones indicated that 53 were identical and 120 were homologous to genes in public protein databases. The remaining 211 selected clones had no significant amino acid sequence similarities with those deduced from any reported genes, though 62 of them appeared in Arabidopsis expressed sequenced tags (ESTs). About 40% of the selected clones were novel, validating the present approach for gene discovery. Northern blot analysis of 22 randomly selected clones confirmed that most were expressed preferentially in inflorescence tissues. In addition, many clones were transcribed at relatively low levels. We demonstrate that the screening method of the present study is useful for systematic classification of cDNA species based on expression specificity.
Collapse
Affiliation(s)
- M Takemura
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, Ikoma, Japan
| | | | | | | | | | | | | | | |
Collapse
|
11
|
Shiina T, Nishii A, Toyoshima Y, Bogorad L. Identification of promoter elements involved in the cytosolic Ca(2+)-mediated photoregulation of maize cab-m1 expression. Plant Physiol 1997; 115:477-483. [PMID: 9342867 PMCID: PMC158505 DOI: 10.1104/pp.115.2.477] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Changes in cytoplasmic Ca2+ levels are involved in the regulation of several plant genes. However, to our knowledge, no regions of genes or specific cis elements have been shown to be involved in the regulation of plant gene expression by cytosolic Ca2+ signaling. The maize (Zea mays) gene cab-m1, which encodes a light-harvesting chlorophyll a/b-binding apoprotein, is positively photoregulated in mesophyll cells (MC) but not in bundle-sheath cells (BSC). This gene is highly preferentially expressed in maize MC versus BSC. In situ transient expression assays have revealed that exposure of tissues to ethyleneglycol-bis(beta-aminoethyl ether)-N,N'-tetraacetic acid (EGTA), which chelates Ca2+, blocks the photostimulation of cab-m1 full promoter (-1026 to + 14) activity in MC of leaf segments of dark-grown maize seedlings. EGTA has no effect on expression in BSC. These results suggest that light-induced elevation of the cytosolic Ca2+ concentration in MC is required for the enhancement of cab-m1 expression in MC. Deletion of the sequence from -1026 to -360 completely abolished Ca2+ responsiveness of cab-m1 expression in MC. On the other hand, a 54-bp fragment in the 5' flanking region (-953 to -899 relative to the translation start site) conferred Ca2+ responsiveness on a -359 core promoter: reporter gene, suggesting that Ca2+ signaling is mediated via specific sequences in this short fragment. Furthermore, possible involvement of Ca(2+)-calmodulin in the signal transduction chain for regulating cab-m1 expression was suggested by the results of inhibitor experiments.
Collapse
Affiliation(s)
- T Shiina
- Graduate School of Human and Environmental Studies, Kyoto University, Japan.
| | | | | | | |
Collapse
|
12
|
Akasu H, Nishii A, Ueno M, Meguro K. Löslichmachung von Tetracyanchinondimethan durch Ladungsaustausch in gemischten Mizellen. Colloid Polym Sci 1978. [DOI: 10.1007/bf01544344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
13
|
Mori C, Tamura T, Kamiya T, Nishii A. [Mass screening and control of cardiovascular diseases in school children]. Nihon Rinsho 1968; 26:877-86. [PMID: 5693514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|