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Matsuda K, Nakahara Y, Choirunnisa AR, Arima K, Wakimoto T. Phylogeny-guided Characterization of Bacterial Hydrazine Biosynthesis Mediated by Cupin/methionyl tRNA Synthetase-like Enzymes. Chembiochem 2024; 25:e202300838. [PMID: 38403952 DOI: 10.1002/cbic.202300838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/27/2024] [Accepted: 02/25/2024] [Indexed: 02/27/2024]
Abstract
Cupin/methionyl-tRNA synthetase (MetRS)-like didomain enzymes catalyze nitrogen-nitrogen (N-N) bond formation between Nω-hydroxylamines and amino acids to generate hydrazines, key biosynthetic intermediates of various natural products containing N-N bonds. While the combination of these two building blocks leads to the creation of diverse hydrazine products, the full extent of their structural diversity remains largely unknown. To explore this, we herein conducted phylogeny-guided genome-mining of related hydrazine biosynthetic pathways consisting of two enzymes: flavin-dependent Nω-hydroxylating monooxygenases (NMOs) that produce Nω-hydroxylamine precursors and cupin/MetRS-like enzymes that couple the Nω-hydroxylamines with amino acids via N-N bonds. A phylogenetic analysis identified the largely unexplored sequence spaces of these enzyme families. The biochemical characterization of NMOs demonstrated their capabilities to produce various Nω-hydroxylamines, including those previously not known as precursors of N-N bonds. Furthermore, the characterization of cupin/MetRS-like enzymes identified five new hydrazine products with novel combinations of building blocks, including one containing non-amino acid building blocks: 1,3-diaminopropane and putrescine. This study substantially expanded the variety of N-N bond forming pathways mediated by cupin/MetRS-like enzymes.
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Affiliation(s)
- Kenichi Matsuda
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo, 060-0812, Japan
| | - Yuto Nakahara
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo, 060-0812, Japan
| | - Atina Rizkiya Choirunnisa
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo, 060-0812, Japan
| | - Kuga Arima
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo, 060-0812, Japan
| | - Toshiyuki Wakimoto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo, 060-0812, Japan
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Arima K, Akiyama S, Shin-Ya K, Matsuda K, Wakimoto T. Carrier Protein Mediated Formation of the Dihydropyridazinone Ring in Actinopyridazinone Biosynthesis. Angew Chem Int Ed Engl 2023:e202305155. [PMID: 37194491 DOI: 10.1002/anie.202305155] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/08/2023] [Accepted: 05/15/2023] [Indexed: 05/18/2023]
Abstract
Heterocycles with nitrogen-nitrogen (N-N) bonds are privileged building blocks of synthetic drugs. They are also found in natural products, although the biosynthetic logic behind them is poorly understood. Actinopyridazinones produced by Streptomyces sp. MSD090630SC-05 possess unique dihydropyridazinone rings that have been studied as core nuclei in several approved synthetic therapeutics. Herein, we performed gene knockouts and in vitro biochemical experiments to elucidate the major steps in actinopyridazinone biosynthesis, including the unprecedented carrier protein mediated machinery for dihydropyridazinone formation.
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Affiliation(s)
- Kuga Arima
- Hokkaido University Faculty of Pharmaceutical Sciences: Hokkaido Daigaku Yakugakubu Daigakuin Yakugaku Kenkyuin, Faculty of Pharmaceutical Sciences, JAPAN
| | - Satoko Akiyama
- Hokkaido University Faculty of Pharmaceutical Sciences: Hokkaido Daigaku Yakugakubu Daigakuin Yakugaku Kenkyuin, Faculty of Pharmaceutical Sciences, JAPAN
| | - Kazuo Shin-Ya
- AIST: Kokuritsu Kenkyu Kaihatsu Hojin Sangyo Gijutsu Sogo Kenkyujo, CMB, JAPAN
| | - Kenichi Matsuda
- Hokkaido University Faculty of Pharmaceutical Sciences: Hokkaido Daigaku Yakugakubu Daigakuin Yakugaku Kenkyuin, Faculty of Pharmaceutical Sciences, JAPAN
| | - Toshiyuki Wakimoto
- Hokkaido University, Faculty of Pharmaceutical Sciences, Kita-12, Nishi-6, Kita-ku, 060-0812, Sapporo, JAPAN
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Choirunnisa AR, Arima K, Abe Y, Kagaya N, Kudo K, Suenaga H, Hashimoto J, Fujie M, Satoh N, Shin-ya K, Matsuda K, Wakimoto T. New azodyrecins identified by a genome mining-directed reactivity-based screening. Beilstein J Org Chem 2022; 18:1017-1025. [PMID: 36051562 PMCID: PMC9379638 DOI: 10.3762/bjoc.18.102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 07/29/2022] [Indexed: 11/23/2022] Open
Abstract
Only a few azoxy natural products have been identified despite their intriguing biological activities. Azodyrecins D–G, four new analogs of aliphatic azoxides, were identified from two Streptomyces species by a reactivity-based screening that targets azoxy bonds. A biological activity evaluation demonstrated that the double bond in the alkyl side chain is important for the cytotoxicity of azodyrecins. An in vitro assay elucidated the tailoring step of azodyrecin biosynthesis, which is mediated by the S-adenosylmethionine (SAM)-dependent methyltransferase Ady1. This study paves the way for the targeted isolation of aliphatic azoxy natural products through a genome-mining approach and further investigations of their biosynthetic mechanisms.
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Affiliation(s)
| | - Kuga Arima
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Yo Abe
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Noritaka Kagaya
- Technology Research Association for Next Generation Natural Products Chemistry, Tokyo 135-0064, Japan
| | - Kei Kudo
- National Institute of Advanced Industrial Science and Technology (AIST), Tokyo 135-0064, Japan
| | - Hikaru Suenaga
- National Institute of Advanced Industrial Science and Technology (AIST), Tokyo 135-0064, Japan
| | - Junko Hashimoto
- Japan Biological Informatics Consortium (JBIC), Tokyo 135-0064, Japan
| | - Manabu Fujie
- Okinawa Institute of Science and Technology Graduate University, Okinawa, 904-0495, Japan
| | - Noriyuki Satoh
- Okinawa Institute of Science and Technology Graduate University, Okinawa, 904-0495, Japan
| | - Kazuo Shin-ya
- National Institute of Advanced Industrial Science and Technology (AIST), Tokyo 135-0064, Japan
| | - Kenichi Matsuda
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo 060-0812, Japan
| | - Toshiyuki Wakimoto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo 060-0812, Japan
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Matsuda K, Arima K, Akiyama S, Yamada Y, Abe Y, Suenaga H, Hashimoto J, Shin-Ya K, Nishiyama M, Wakimoto T. A Natural Dihydropyridazinone Scaffold Generated from a Unique Substrate for a Hydrazine-Forming Enzyme. J Am Chem Soc 2022; 144:12954-12960. [PMID: 35771530 DOI: 10.1021/jacs.2c05269] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Nitrogen-nitrogen bond-containing functional groups are rare, but they are found in a considerably wide class of natural products. Recent clarifications of the biosynthetic routes for such functional groups shed light onto overlooked biosynthetic genes distributed across the bacterial kingdom, highlighting the presence of yet-to-be identified natural products with peculiar functional groups. Here, the genome-mining approach targeting a unique hydrazine-forming gene led to the discovery of actinopyridazinones A (1) and B (2), the first natural products with dihydropyridazinone rings. The structure of actinopyridazinone A was unambiguously established by total synthesis. Biosynthetic studies unveiled the structural diversity of natural hydrazines derived from this family of N-N bond-forming enzymes.
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Affiliation(s)
- Kenichi Matsuda
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo 060-0812, Japan.,Global Station for Biosurfaces and Drug Discovery, Global Institution for Collaborative Research and Education, Hokkaido University, Kita 12, Nishi 6, Sapporo 060-0812, Japan
| | - Kuga Arima
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo 060-0812, Japan
| | - Satoko Akiyama
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo 060-0812, Japan
| | - Yuito Yamada
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo 060-0812, Japan
| | - Yo Abe
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo 060-0812, Japan
| | - Hikaru Suenaga
- National Institute of Advanced Industrial Science and Technology (AIST), Tokyo 135-0064, Japan
| | - Junko Hashimoto
- Japan Biological Informatics Consortium (JBIC), Tokyo 135-0064, Japan
| | - Kazuo Shin-Ya
- National Institute of Advanced Industrial Science and Technology (AIST), Tokyo 135-0064, Japan
| | - Makoto Nishiyama
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan.,Agro-Biotechnology Research Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Toshiyuki Wakimoto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo 060-0812, Japan.,Global Station for Biosurfaces and Drug Discovery, Global Institution for Collaborative Research and Education, Hokkaido University, Kita 12, Nishi 6, Sapporo 060-0812, Japan
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Tsuji Y, Tamai M, Koga T, Morimoto S, Kawashiri SY, Nonaka F, Yamanashi H, Arima K, Aoyagi K, Maeda T, Matsuda F, Kawakami A. POS1441 INFLUENCE OF ENVIRONMENTAL AND GENETIC FACTORS ON SERUM IGG4 DURING HEALTH CHECKUPS IN NAGASAKI ISLAND STUDY. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.4164] [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: 11/03/2022]
Abstract
BackgroundAlthough serum IgG4 levels are important for the diagnosis of IgG4-related diseases (IgG4-RD), few studies have validated IgG4 levels in healthy individuals in large resident medical examination cohorts and investigated background factors associated with serum IgG4.A report on genetic factors shows that HLA loci associate with IgG4-RD found in Japanese nation-wide IgG4-RD registry1). However, environmental and genetic factors related to the elevated serum IgG4 levels, which may closely associate with development of IgG4-RD, have previously been unclear in healthy subjects. The nephelometric immunoassay (NIA) is conventionally used to measure IgG4, but it requires a relatively large amount of serum. The magnetic bead panel assay (MBA), which can evaluate IgG4 levels with only a few ml of serum, has an advantage compared with NIA regarding to required sample volume, but the correlation between the two methods is unclear.ObjectivesFirst, we attempted to verify the accuracy of the MBA compared to the standard NIA in the first cohort. Next, we examined the relationship between IgG4 measured by the MBA and background information of healthy subjects to identify variables that correlate with serum IgG4 in the second cohort.MethodsFirst, Kanazawa University collected 947 samples from the resident health examination, and IgG4 levels were measured by both MBA and NIA, and the correlation between the two was verified using Spearman’s rank correlation coefficient (first cohort). Next (second cohort), serum IgG4 of 3240 samples of Nagasaki Island Study (NaIS), which had started in 2014 collaborating among Nagasaki University and Goto City, Nagasaki Prefecture, intended for research of varying conditions and diseases including IgG4-RD, were then measured by MBA. These subjects were stratified into the two groups as IgG4-high and IgG4-within normal limit using the aforementioned cutoff values, and compared with background information such as age, gender, drinking, smoking, uric acid, serum creatinine, comorbidities and HLA typing, including DRB1*04:06, *04:03, *04:05, *04:10 as disease-susceptibility gene, DRB1*09:01 and DQB1*03:03 as protective gene1).ResultsIgG4 by MBA correlated well with IgG4 by NIA (r=0.94, p-value<0.001) which was determined from Kanazawa samples (N=947). 1,463.6 mg/mL of IgG4 of MBA corresponded to 135 mg/dl, the normal cut-off value for IgG4 by NIA. In the analysis of NaIS samples (N=3240), the overall high IgG4 positivity rate was 6.3%. Multivariable analysis including age, gender, smoking and drinking, led by univariate analysis, showed that gender and smoking were significantly associated with high serum IgG4 positivity (male: odds ratio = 1.8, 95%CI =1.2-2.7, p = 0.009, smoking: odds ratio = 1.7, 95%CI =1.1-2.5, p = 0.012). There was no association between high serum IgG4 level and HLA genotyping.ConclusionWe concluded that MBA is a good method to measure serum IgG4 even by the very small sample volume. In our study, the prevalence of serum IgG4 positivity was high tendency than previous report2). Our data showed that male and smoking are independent factors associated with high serum IgG4 positivity. There were no association between serum IgG4 level and HLA genotyping in healthy subjects. Further comprehensive investigation is necessary to clarify high risk subjects who will develop IgG4-RD.References[1]Terao C, et al. Lancet Rheumatol 2019;1: e14–22.[2]Carballo I, et al. PLoS One. 2016;11: e0149330.Disclosure of InterestsNone declared
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Arima K, Tamai M, Nonaka F, Iwamoto N, Mizukami S, Nishimura T, Abe Y, Origuchi T, Aoyagi K. SAT0458 THE POLYMORPHISM ON FAT MASS AND OBESITY ASSOCIATED GENE (FTO) WAS ASSOCIATED WITH LOW BONE MASS IN JAPANESE COMMUNITY DWELLING POPULATION. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.4050] [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: 11/04/2022]
Abstract
Background:A polymorphism onFTO(OMIM 610966) was reported as a causal variant for obesity, plays a critical rule not only in amount of adipose tissue but also in function of mitochondrial thermogenesis1.Objectives:To examine the association of the genotype on a single nucleotide polymorphism onFTOwith bone health.Methods:FTO rs1421085 polymorphism was genotyped in 1,601 community-dwelling Japanese participants. This cross-sectional study was nested in Nagasaki Islands Study, which is a prospective cohort in Goto City, in islands of Japan. Participants were recruited at medical check-ups for community dwelling population.Bone mass of the calcaneus was evaluated with stiffness index calculated using a quantitative ultrasound measurement. Low bone mass was defined as a stiffness index less than 80 % of the young adult mean.Sera and peripheral blood mononuclear cells were obtained. The SNP of rs1421085 was genotyped using hydrolysis probe. The chi-squared test was used to determine whether the variants were in equilibrium in that population. Trend for the median of BMI among genotypes was assessed using the Jonckheere-Terpstra test. Potential associations between FTO polymorphism and overweight and between the polymorphism and low bone mass were evaluated using logistic regression. All analyses were carried out using SPSS 23.Results:Genotype and allele frequencies for the polymorphism were in Hardy-Weinberg equilibrium (minor allele frequency 0.16, p = 0.40) in 1,601 community-dwelling persons (mean age was 68.5 years in men and 68.1 years in women).There were significant associations between the minor allele and higher median of BMI on dose dependent manner in men (p = 0.04 for trend in men and p = 0.10 for trend in women, respectively), and between the minor allele and overweight (>25 in BMI, OR 1.52, 95%CI 1.07 2.14, p=0.02 in men, OR 1.48, 95%CI 1.16 1.95, p=0.01 in women).Logistic regression analysis showed a significant protective association in men with carriers of minor allele against low bone mass after an adjustment for age and BMI (OR 0.63, 95%CI 0.44 0.90, p=0.01 in men, not significant in women).Conclusion:Our study indicated significant associations of the polymorphism onFTOwith BMI and bone mass among community dwelling men. The polymorphism may play a rule in a part of bone health with higher BMI and other beneficial functions.References:[1]N Engl J Med. 2015; 373: 895-907Disclosure of Interests:None declared
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Katoh N, Kataoka Y, Saeki H, Hide M, Kabashima K, Etoh T, Igarashi A, Imafuku S, Kawashima M, Ohtsuki M, Fujita H, Arima K, Takagi H, Chen Z, Shumel B, Ardeleanu M. Efficacy and safety of dupilumab in Japanese adults with moderate-to-severe atopic dermatitis: a subanalysis of three clinical trials. Br J Dermatol 2019; 183:39-51. [PMID: 31564057 PMCID: PMC7384164 DOI: 10.1111/bjd.18565] [Citation(s) in RCA: 19] [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] [Accepted: 09/25/2019] [Indexed: 12/15/2022]
Abstract
Background Dupilumab, a human monoclonal antibody, blocks the shared receptor unit for interleukin‐4 and interleukin‐13. International phase II and III studies have evaluated the efficacy and safety of dupilumab in adults with moderate‐to‐severe atopic dermatitis (AD), but the effects of dupilumab in Japanese patients have not been reported. Objectives To evaluate the efficacy and safety of dupilumab in Japanese patients with moderate‐to‐severe AD. Methods We analysed the efficacy and safety of dupilumab in the Japanese cohorts of a 16‐week, phase IIb dose‐finding trial (AD‐1021; NCT01859988); a 16‐week, phase III, placebo‐controlled monotherapy trial (LIBERTY AD SOLO 1; NCT02277743) and a 52‐week, phase III, placebo‐controlled study of dupilumab with topical corticosteroids (LIBERTY AD CHRONOS; NCT02260986). Results Twenty‐seven, 106 and 117 Japanese patients were enrolled in AD‐1021, SOLO 1 and CHRONOS, respectively. Baseline disease severity was numerically higher in the Japanese cohort than in the overall study population. Generally, dupilumab significantly improved signs and symptoms of AD, including pruritus and patient quality of life, compared with placebo in the Japanese cohort, consistent with the overall study population. The combined safety profile of dupilumab in the Japanese cohort was similar to that in the total study populations; dupilumab was associated with an increased incidence of injection‐site reactions and conjunctivitis compared with placebo. Dupilumab was associated with rapid reduction in thymus and activation‐regulated chemokine and gradual IgE reductions. Conclusions Dupilumab alone or with topical corticosteroids improved signs and symptoms of AD, had an acceptable safety profile, and suppressed biomarkers of type 2 inflammation compared with placebo in Japanese adult patients with moderate‐to‐severe AD. What's already known about this topic? Differences in atopic dermatitis (AD) pathology have been reported between Asian and Western populations, in which distinct helper T‐cell activation profiles have been observed. International clinical studies in adults with moderate‐to‐severe AD have evaluated the efficacy and safety of dupilumab, which blocks interleukin‐4 and interleukin‐13, key molecules in type 2 inflammation. The effects of dupilumab in Japanese patients specifically have not yet been reported.
What does this study add? Dupilumab alone or with topical corticosteroids improved signs and symptoms of AD and had an acceptable safety profile compared with placebo in Japanese patients with moderate‐to‐severe AD. The effects were comparable with those observed in the overall study population. Reported immunological differences in AD pathology in Asian patients may be secondary to type 2 immune activation.
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Affiliation(s)
- N Katoh
- Department of Dermatology, Kyoto Prefectural University of Medicine Graduate School of Medical Science, Kyoto, Japan
| | - Y Kataoka
- Department of Dermatology, Osaka Habikino Medical Center, Osaka, Japan
| | - H Saeki
- Department of Dermatology, Nippon Medical School, Tokyo, Japan
| | - M Hide
- Department of Dermatology, Hiroshima University, Hiroshima, Japan
| | - K Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - T Etoh
- Department of Dermatology, Tokyo Teishin Postal Services Agency Hospital, Tokyo, Japan
| | - A Igarashi
- Department of Dermatology, NTT Medical Center Tokyo, Tokyo, Japan
| | - S Imafuku
- Department of Dermatology, Fukuoka University, Fukuoka, Japan
| | - M Kawashima
- Department of Dermatology, Tokyo Women's Medical University, School of Medicine, Tokyo, Japan
| | - M Ohtsuki
- Department of Dermatology, Jichi Medical University, Tochigi, Japan
| | | | | | | | - Z Chen
- Regeneron Pharmaceuticals, Inc., Tarrytown, NY, U.S.A
| | - B Shumel
- Regeneron Pharmaceuticals, Inc., Tarrytown, NY, U.S.A
| | - M Ardeleanu
- Regeneron Pharmaceuticals, Inc., Tarrytown, NY, U.S.A
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Nakahara T, Fujita H, Arima K, Taguchi Y, Motoyama S, Furue M. Treatment satisfaction in atopic dermatitis relates to patient-reported severity: A cross-sectional study. Allergy 2019; 74:1179-1181. [PMID: 30593669 DOI: 10.1111/all.13712] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- T. Nakahara
- Division of Skin Surface Sensing; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
- Department of Dermatology; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
| | | | | | | | | | - M. Furue
- Department of Dermatology; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
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Sekito S, Nishikawa K, Masui S, Hasegawa Y, Kanda H, Arima K, Sugimura Y. Effect of Donor Age on Graft Function and Pathologic Findings in Living Donor Transplantation. Transplant Proc 2018; 50:2431-2435. [DOI: 10.1016/j.transproceed.2018.04.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 03/10/2018] [Accepted: 04/06/2018] [Indexed: 01/05/2023]
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Kanaoka M, Yamaguchi Y, Komitsu N, Arima K, Izuhara K, Aihara M. 338 Pro-fibrotic phenotype of human skin fibroblasts induced by periostin via modulating TGF-β signaling. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.07.533] [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: 11/15/2022]
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Miyata T, Yamashita Y, Yamao T, Umezaki N, Tsukamoto M, Kitano Y, Yamamura K, Arima K, Kaida T, Nakagawa S, Imai K, Hashimoto D, Chikamoto A, Ishiko T, Asato T, Mikami Y, Aishima S, Baba H. Hepatobiliary and Pancreatic: Hepatocellular carcinoma developed with angiomyolipoma. J Gastroenterol Hepatol 2017; 32:547. [PMID: 28320064 DOI: 10.1111/jgh.13655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Accepted: 11/12/2016] [Indexed: 12/09/2022]
Affiliation(s)
- T Miyata
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - Y Yamashita
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Yamao
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - N Umezaki
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - M Tsukamoto
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - Y Kitano
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Yamamura
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Arima
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Kaida
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - S Nakagawa
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Imai
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Ishiko
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Asato
- Department of Diagnostic Pathology, Kumamoto University Hospital, Kumamoto, Japan
| | - Y Mikami
- Department of Diagnostic Pathology, Kumamoto University Hospital, Kumamoto, Japan
| | - S Aishima
- Department of Pathology and Microbiology, Faculty of Medicine, Saga University, Saga, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of life Sciences, Kumamoto University, Kumamoto, Japan
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Ishimoto T, Miyake K, Nandi T, Yashiro M, Huang K, Arima K, Izumi D, Baba Y, Baba H, Tan P. 21P Identification of the novel molecules mediating gastric cancer invasion based on genomic analysis of cancer-associated fibroblasts. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00183-6] [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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Arima K, Ishimoto T, Ohmuraya M, Okabe H, Kitano Y, Yamamura K, Kaida T, Nakagawa S, Imai K, Hashimoto D, Chikamoto A, Yamashita YI, Baba H. 20P Verification of mechanism that CSC markers are implicated in poor prognosis for pancreatic ductal adenocarcinoma. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw573.019] [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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Ishimoto T, Miyake K, Nandi T, Yashiro M, Huang K, Arima K, Izumi D, Baba Y, Baba H, Tan P. 21P Identification of the novel molecules mediating gastric cancer invasion based on genomic analysis of cancer-associated fibroblasts. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw573.020] [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: 11/13/2022] Open
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15
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Arima K, Ishimoto T, Ohmuraya M, Okabe H, Kitano Y, Yamamura K, Kaida T, Nakagawa S, Imai K, Hashimoto D, Chikamoto A, Yamashita YI, Baba H. 20P Verification of mechanism that CSC markers are implicated in poor prognosis for pancreatic ductal adenocarcinoma. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00182-4] [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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16
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Daitoku N, Okabe H, Hashimoto D, Chikamoto A, Hayashi H, Nitta H, Taki K, Higashi T, Kaida T, Arima K, Ishiko T, Beppu T, Baba H. Education and Imaging. Hepatobiliary and Pancreatic: Replaced common hepatic artery on left gastric artery: a rare anomaly and implication for pancreaticoduodenectomy. J Gastroenterol Hepatol 2015; 30:1695. [PMID: 26768946 DOI: 10.1111/jgh.12968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- N Daitoku
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Okabe
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Hayashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Taki
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Kaida
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Arima
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Ishiko
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Beppu
- Department of Multidisciplinary Treatment for Gastroenterological Cancer, Kumamoto University Hospital, Kumamoto, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
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Satoh J, Tabunoki H, Ishida T, Saito Y, Arima K. Accumulation of a repulsive axonal guidance molecule RGMa in amyloid plaques: a possible hallmark of regenerative failure in Alzheimer's disease brains. Neuropathol Appl Neurobiol 2015; 39:109-20. [PMID: 22582881 DOI: 10.1111/j.1365-2990.2012.01281.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [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: 01/03/2023]
Abstract
AIMS RGMa is a repulsive guidance molecule that induces the collapse of axonal growth cones by interacting with the receptor neogenin in the central nervous system during development. It remains unknown whether RGMa plays a role in the neurodegenerative process of Alzheimer's disease (AD). We hypothesize that RGMa, if it is concentrated on amyloid plaques, might contribute to a regenerative failure of degenerating axons in AD brains. METHODS By immunohistochemistry, we studied RGMa and neogenin (NEO1) expression in the frontal cortex and the hippocampus of 6 AD and 12 control cases. The levels of RGMa expression were determined by qRT-PCR and Western blot in cultured human astrocytes following exposure to cytokines and amyloid beta (Aβ) peptides. RESULTS In AD brains, an intense RGMa immunoreactivity was identified on amyloid plaques and in the glial scar. In the control brains, the glial scar and vascular foot processes of astrocytes expressed RGMa immunoreactivity, while oligodendrocytes and microglia were negative for RGMa. In AD brains, a small subset of amyloid plaques expressed a weak NEO1 immunoreactivity, while some reactive astrocytes in both AD and control brains showed an intense NEO1 immunoreactivity. In human astrocytes, transforming growth factor beta-1 (TGFβ1 ), Aβ 1-40 or Aβ 1-42 markedly elevated the levels of RGMa, and TGFβ1 also increased its own levels. Coimmunoprecipitation analysis validated the molecular interaction between RGMa and the C-terminal fragment β of amyloid beta precursor protein (APP). Furthermore, recombinant RGMa protein interacted with amyloid plaques in situ. CONCLUSIONS RGMa, produced by TGFβ-activated astrocytes and accumulated in amyloid plaques and the glial scar, could contribute to the regenerative failure of degenerating axons in AD brains.
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Affiliation(s)
- J Satoh
- Department of Bioinformatics and Molecular Neuropathology, Meiji Pharmaceutical University, Departments ofLaboratory MedicinePsychiatry, National Center Hospital, NCNP, TokyoDepartment of Pathology and Laboratory Medicine, Kohnodai Hospital, NCGM, Chiba, Japan
| | - H Tabunoki
- Department of Bioinformatics and Molecular Neuropathology, Meiji Pharmaceutical University, Departments ofLaboratory MedicinePsychiatry, National Center Hospital, NCNP, TokyoDepartment of Pathology and Laboratory Medicine, Kohnodai Hospital, NCGM, Chiba, Japan
| | - T Ishida
- Department of Bioinformatics and Molecular Neuropathology, Meiji Pharmaceutical University, Departments ofLaboratory MedicinePsychiatry, National Center Hospital, NCNP, TokyoDepartment of Pathology and Laboratory Medicine, Kohnodai Hospital, NCGM, Chiba, Japan
| | - Y Saito
- Department of Bioinformatics and Molecular Neuropathology, Meiji Pharmaceutical University, Departments ofLaboratory MedicinePsychiatry, National Center Hospital, NCNP, TokyoDepartment of Pathology and Laboratory Medicine, Kohnodai Hospital, NCGM, Chiba, Japan
| | - K Arima
- Department of Bioinformatics and Molecular Neuropathology, Meiji Pharmaceutical University, Departments ofLaboratory MedicinePsychiatry, National Center Hospital, NCNP, TokyoDepartment of Pathology and Laboratory Medicine, Kohnodai Hospital, NCGM, Chiba, Japan
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Okabe H, Hashimoto D, Chikamoto A, Hayashi H, Nitta H, Taki K, Higashi T, Arima K, Ishiko T, Beppu T, Baba H. Hepatobiliary and Pancreatic: Skin metastases from cholangiocarcinoma mimicking herpes zoster. J Gastroenterol Hepatol 2015. [PMID: 26211694 DOI: 10.1111/jgh.12964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- H Okabe
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Hayashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Taki
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Arima
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Ishiko
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Beppu
- Department of Multidisciplinary Treatment for Gastroenterological Cancer, Kumamoto University Hospital, Kumamoto, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
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19
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Arima K, Chikamoto A, Hashimoto D, Kaida T, Higashi T, Taki K, Takeyama H, Okabe H, Nitta H, Hayashi H, Beppu T, Baba H. Education and Imaging. Hepatology: Hepatocellular carcinoma with duodenal metastasis. J Gastroenterol Hepatol 2015; 30:1115. [PMID: 26094663 DOI: 10.1111/jgh.12868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- K Arima
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Kaida
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - K Taki
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Takeyama
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Okabe
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Hayashi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Beppu
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
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Arima K, Nishimura T, Abe Y, Aoyagi K. THU0478 Longitudinal Associations Between Painful Knee Osteoarthritis and Difficulties in Physical Functioning Among Community-Dwelling Women: A 9 Years Follow-Up Study in Japan. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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21
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Nakashima Y, Tamai M, Kita J, Tuji S, Fukui S, Umeda M, Nishino A, Suzuki T, Horai Y, Nishimura T, Koga T, Kawashiri S, Iwamoto N, Ichinose K, Hirai Y, Arima K, Yamasaki S, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. FRI0027 MRI-Proven Bone Marrow Oedema at Baseline is the Strongest Predictor Toward the Development of Rapid Radiographic Progression at 1 Year in Patients with Early-Stage Rheumatoid Arthritis: Results from Nagasaki University Early Arthritis Cohort. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5778] [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: 11/04/2022]
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22
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Origuchi T, Arima K, Umeda M, Kawashiri SY, Koga T, Ichinose K, Tamai M, Nakamura H, Miyashita T, Fujikawa K, Mizokami A, Iwanaga N, Furuyama M, Nakashima M, Aramaki T, Ueki Y, Kawabe Y, Fukuda T, Eguchi K, Kawakami A. SAT0533 Early Diagnosis is Associated with the Less Flair in Patients with Remitting Seronegative Symmetrical Synovitis with Pitting Edema (RS3PE) Syndrome. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.3827] [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: 11/03/2022]
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23
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Tamai M, Arima K, Nakashima Y, Kita J, Umeda M, Fukui S, Nishino A, Suzuki T, Horai Y, Okada A, Koga T, Kawashiri SY, Iwamoto N, Ichinose K, Yamasaki S, Nakamura H, Origuchi T, Aoyagi K, Uetani M, Eguchi K, Kawakami A. FRI0048 MRI Bone Erosion at Baseline Predicts the Subsequent Radiographic Progression in Early-Stage RA Patients Who Achieved in Sustained Clinical Good Response: Sub-Analysis from Nagasaki University Early Arthritis Cohort. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Nishikawa K, Mizuno S, Masui S, Kanda H, Yamada Y, Arima K, Isaji S, Sugimura Y. Usefulness of monitoring cell-mediated immunity for predicting post-kidney transplantation viral infection. Transplant Proc 2014; 46:552-5. [PMID: 24656010 DOI: 10.1016/j.transproceed.2013.11.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Accepted: 11/05/2013] [Indexed: 12/12/2022]
Abstract
BACKGROUND Monitoring cell-mediated immunity (CMI) can be used to estimate the risk of viral infections in kidney transplant recipients. The Immuknow (IMK) assay measures CD4(+) T-cell adenosine triphosphate activity, assesses patient CMI status, and assists clinicians in determining the risk of viral infection. METHODS We retrospectively analyzed 224 IMK values in 39 kidney transplant recipients at our institution from April 2012 to January 2013. We analyzed the relationship between IMK value and viral infection during the early and late post-transplantation periods. Multiple regression analyses were performed, to determine which factors impacted the results of the IMK assay. RESULTS Eight patients developed viral infections, including BK virus, cytomegalovirus, herpes simplex, and shingles. Five infections occurred in the early post-transplantation period (<50 d) and 3 in the late period (>120 d). The IMK levels in patients who developed an infection in the early period were within normal limits; however, those in the late period were significantly lower than 200 ng/mL (421.0 ± 062.6 for early vs 153.7 ± 72.7 for late; P = .02). Our multiple regression analyses indicated that peripheral white blood cell and neutrophil counts affected IMK values (P = .03 and P = .02, respectively). CONCLUSIONS The IMK assay is a useful test for identifying patients at risk for post-transplantation viral infections in the late transplant period.
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Affiliation(s)
- K Nishikawa
- Department of Nephro-Urologic Surgery and Andrology, Mie University School of Medicine, Mie, Japan.
| | - S Mizuno
- Department of Hepatobiliary Pancreatic and Transplant Surgery, Mie University School of Medicine, Mie, Japan
| | - S Masui
- Department of Nephro-Urologic Surgery and Andrology, Mie University School of Medicine, Mie, Japan
| | - H Kanda
- Department of Nephro-Urologic Surgery and Andrology, Mie University School of Medicine, Mie, Japan
| | - Y Yamada
- Department of Nephro-Urologic Surgery and Andrology, Mie University School of Medicine, Mie, Japan
| | - K Arima
- Department of Nephro-Urologic Surgery and Andrology, Mie University School of Medicine, Mie, Japan
| | - S Isaji
- Department of Hepatobiliary Pancreatic and Transplant Surgery, Mie University School of Medicine, Mie, Japan
| | - Y Sugimura
- Department of Nephro-Urologic Surgery and Andrology, Mie University School of Medicine, Mie, Japan
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Satoh J, Tabunoki H, Ishida T, Saito Y, Arima K. Ubiquilin-1 immunoreactivity is concentrated on Hirano bodies and dystrophic neurites in Alzheimer's disease brains. Neuropathol Appl Neurobiol 2014; 39:817-30. [PMID: 23421764 DOI: 10.1111/nan.12036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [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: 08/29/2012] [Accepted: 02/07/2013] [Indexed: 12/11/2022]
Abstract
AIMS Ubiquilin-1 acts as an adaptor protein that mediates the translocation of polyubiquitinated proteins to the proteasome for degradation. Although previous studies suggested a key role of ubiquilin-1 in the pathogenesis of Alzheimer's disease (AD), a direct relationship between ubiquilin-1 and Hirano bodies in AD brains remains unknown. METHODS By immunohistochemistry, we studied ubiquilin-1 and ubiquilin-2 expression in the frontal cortex and the hippocampus of six AD and 13 control cases. RESULTS Numerous Hirano bodies, accumulated in the hippocampal CA1 region of AD brains, expressed intense immunoreactivity for ubiquilin-1. They were much less frequently found in control brains. However, Hirano bodies did not express a panel of markers for proteasome, autophagosome or pathogenic proteins, such as ubiquilin-2, ubiquitin, p62, LC3, beclin-1, HDAC6, paired helical filament (PHF)-tau, protein-disulphide isomerase (PDI) and phosphorylated TDP-43, but some of them expressed C9orf72. Ubiquilin-1-immunoreactive deposits were classified into four distinct morphologies, such as rod-shaped structures characteristic of Hirano bodies, dystrophic neurites contacting senile plaques, fragmented structures accumulated in the lesions affected with severe neuronal loss, and thread-shaped structures located mainly in the molecular layer of the hippocampus. CONCLUSIONS Ubiquilin-1 immunoreactivity is concentrated on Hirano bodies and dystrophic neurites in AD brains, suggesting that aberrant expression of ubiquilin-1 serves as one of pathological hallmarks of AD.
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Affiliation(s)
- J Satoh
- Department of Bioinformatics and Molecular Neuropathology, Meiji Pharmaceutical University, Tokyo, Japan
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Sasaki T, Matsumoto T, Wada H, Ohishi K, Kanda H, Yamada Y, Arima K, Katayama N, Sugimura Y. Successful treatment of non-invasive bladder tumour in a haemophilia A patient with high-responding inhibitors: a case report. Haemophilia 2014; 20:e399-401. [PMID: 25131336 DOI: 10.1111/hae.12486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/28/2014] [Indexed: 11/28/2022]
Affiliation(s)
- T Sasaki
- Department of Nephro-Urologic Surgery and Andrology, Mie University Graduate School of Medicine, Tsu, Mie, Japan
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Mizukami S, Abe Y, Tsujimoto R, Arima K, Kanagae M, Chiba G, Aoyagi K. Accuracy of spinal curvature assessed by a computer-assisted device and anthropometric indicators in discriminating vertebral fractures among individuals with back pain. Osteoporos Int 2014; 25:1727-34. [PMID: 24627138 DOI: 10.1007/s00198-014-2680-y] [Citation(s) in RCA: 4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 03/05/2014] [Indexed: 10/25/2022]
Abstract
UNLABELLED This study examined the accuracy of thoracic and lumbar kyphotic angles as well as anthropometric indicators for discriminating patients with vertebral fracture among Japanese women >50 years old with back pain. Along with region-specific kyphotic angles and anthropometric indicators, the combination of thoracic and lumbar kyphotic angles offered the highest accuracy. INTRODUCTION Vertebral fractures have been associated with thoracic kyphosis. However, reports on lumbar kyphotic changes in association with vertebral fracture are scarce. This study investigated the accuracy of thoracic kyphotic angle (TKA) and lumbar kyphotic angle (LKA) measurements as well as anthropometric indicators (wall-occiput distance (WOD) and rib-pelvis distance (RPD)) in discriminating patients with vertebral fracture. METHODS Lateral radiographs of the spine were obtained in 70 postmenopausal Japanese women who visited an orthopedic clinic with low back pain (mean age, 76.2 ± 9.0 years). Radiographic vertebral fracture was diagnosed using quantitative measurement according to Japanese criteria. Osteoarthritis (OA) was defined as Kellgren-Lawrence (KL) grade 3 or higher. TKA and LKA were measured using SpinalMouse®. WOD and RPD were also measured. RESULTS At least one vertebral fracture was present in 49 subjects (70 %). Women with vertebral fractures showed significant increases in LKA, TKA + LKA, and WOD and decreases in RPD. Logistic regression analysis showed significant association between TKA + LKA and vertebral fracture independent of the presence of OA. Receiver operating characteristic analysis revealed that TKA was useful for discriminating thoracic fractures (area under the curve (AUC), 0.730) and LKA was useful for lumbar fractures (AUC, 0.691). The combination of TKA + LKA offered the highest accuracy for detecting thoracic, lumbar, and any vertebral fractures, with AUCs of 0.779, 0.728, and 0.783, respectively. WOD and RPD showed low-to-moderate accuracies for thoracic, lumbar, and any vertebral fractures. CONCLUSIONS Assessment of spinal kyphosis by SpinalMouse® as well as anthropometric indicators proved useful in discriminating subjects with vertebral fractures. These convenient and radiation-free methods could contribute to early diagnosis of vertebral fractures and subsequent appropriate treatment, thus preventing additional osteoporotic fractures.
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Affiliation(s)
- S Mizukami
- Department of Public Health, Graduate School of Biomedical Sciences, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, 852-8523, Japan
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Kawashiri SY, Nishino A, Suzuki T, Horai Y, Nakashima Y, Iwamoto N, Ichinose K, Arima K, Tamai M, Nakamura H, Origuchi T, Aoyagi K, Eguchi K, Kawakami A. AB1018 Articular Synovitis or Tenosynovitis - Which is More Involved toward Functional Disabilities in Patients with Rheumatoid Arthritis? Investigation of Wrist and Finger Joints by Ultrasound in Early-Stage Rheumatoid Arthritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4082] [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: 11/03/2022]
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Origuchi T, Arima K, Kawashiri SY, Tamai M, Nakamura H, Kawakami A, Tsukada T, Miyashita T, Aramaki T, Furuyama M, Kawabe Y, Iwanaga N, Ueki Y, Fukuda T, Eguchi K. OP0117 Surveillance of the Outcome of Remitting Seronegative Symmetrical Synovitis with Pitting Edema (RS3PE) Syndrome. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4160] [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: 11/04/2022]
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Kawashiri SY, Nishino A, Suzuki T, Nakashima Y, Horai Y, Iwamoto N, Ichinose K, Arima K, Tamai M, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. SAT0215 Ultrasound Disease Activity at 3 Months Predicts the Clinical Response at 6 Months of Patients with Rheumatoid Arthritis Treated by Biologic Disease Modifying Anti-Rheumatic Drugs. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2574] [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: 11/03/2022]
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Kawashiri SY, Nishino A, Nakashima Y, Suzuki T, Horai Y, Nakashima M, Mizokami A, Matsuoka N, Iwamoto N, Ichinose K, Arima K, Tamai M, Nakamura H, Origuchi T, Aoyagi K, Kawakami A. AB0646 Low Reactive Hyperemia Index Assessed by Endopat and High Circulating Level of Placenta Growth Factor, Growth Differentiation Factor-15 and Pentraxin-3 Reflect the Presence of Vasculopathy as Well as Progressive Disease Status in Patients with Systemic Sc. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4200] [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: 11/04/2022]
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Kawashiri SY, Suzuki T, Nakashima Y, Horai Y, Okada A, Nishino A, Iwamoto N, Ichinose K, Arima K, Tamai M, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. Synovial inflammation assessed by ultrasonography correlates with MRI-proven osteitis in patients with rheumatoid arthritis. Rheumatology (Oxford) 2014; 53:1452-6. [DOI: 10.1093/rheumatology/keu034] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [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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Kawashiri SY, Suzuki T, Nakashima Y, Horai Y, Okada A, Iwamoto N, Ichinose K, Tamai M, Arima K, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. SAT0524 Automated Breast Volume Scanner (ABVS), a New Automated Ultrasonic Device, is Useful to Examine Joint Injury in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2248] [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: 11/04/2022]
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Tamai M, Nakashima Y, Suzuki T, Okada A, Kita J, Horai Y, Kawashiri SY, Iwamoto N, Ichinose K, Arima K, Yamasaki S, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. FRI0084 The presence of magnetic resonance imaging-proven osteitis at entry predicts the development of rapid radiographic progression in patients with early rheumatoid arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2541] [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: 11/03/2022]
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Arima K, Kanazawa N, Furukawa F, Ida H, Yoshiura K. THU0371 Increased expression of inflammatory cytokines and chemokines in an autoinflammatory disorder, nakajo-nishimura syndrome. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2336] [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: 11/03/2022]
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Origuchi T, Suzuki T, Nakashima Y, Horai Y, Okada A, Kawashiri SY, Iwamoto N, Ichinose K, Arima K, Tamai M, Nakamura H, Eguchi K, Kawakami A. AB0482 Takayasu arteritis and hla-b52 allele: a single-centre analysis from japanese population. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2804] [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: 11/04/2022]
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Kawashiri SY, Suzuki T, Nakashima Y, Horai Y, Okada A, Iwamoto N, Ichinose K, Arima K, Tamai M, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. SAT0489 The Severity of Synovial Inflammation Assessed by Musculoskeletal Ultrasonography Correlates with that of Osteitis Assessed by Magnetic Resonance Imaging in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2213] [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: 11/04/2022]
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Origuchi T, Kawashiri SY, Ichinose K, Tamai M, Arima K, Yamasaki S, Nakamura H, Kawakami A. AB1234 Clinical characteristics of IgG4-related orbital pseudo-tumor. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.1232] [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: 11/03/2022]
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Suzuki T, Yamasaki S, Nakashima Y, Horai Y, Okada A, Kawashiri SY, Iwamoto N, Ichinose K, Arima K, Tamai M, Nakamura H, Origuchi T, Osaki M, Ohyama K, Kuroda N, Eguchi K, Kawakami A. AB0109 Regulatory mechanism and importance of thrombospondin-1 (tsp-1) expression in rheumatoid synovial tissues: analysis by immunohistochemistry, in vitro fibroblast-like synovial cell culture and clinical evaluation. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2432] [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: 11/04/2022]
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Tamai M, Nakashima Y, Suzuki T, Kita J, Okada A, Kawashiri SY, Iwamoto N, Ichinose K, Arima K, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. FRI0074 Stringent therapies improve both radiographic and clinical outcome in early-stage ra patients from japanese population: longitudinal study from nagasaki early arthritis cohort. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1201] [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: 11/04/2022]
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Nagayama Y, Nakahara M, Shimamura M, Horie I, Arima K, Abiru N. Prophylactic and therapeutic efficacies of a selective inhibitor of the immunoproteasome for Hashimoto's thyroiditis, but not for Graves' hyperthyroidism, in mice. Clin Exp Immunol 2012; 168:268-73. [PMID: 22519588 DOI: 10.1111/j.1365-2249.2012.04578.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Major histocompatibility complex (MHC) class I-restricted T cell epitopes are generated mainly by the immunoproteasome in antigen-presenting cells. Therefore, inhibition of activity of this proteolytic complex molecule is thought to be a potential treatment for cell-mediated autoimmune diseases. We therefore studied the efficacy of an immunoproteasome inhibitor, ONX 0914 (formerly PR-957), for the treatment of autoimmune thyroid diseases, including cell-mediated Hashimoto's thyroiditis and autoantibody-mediated Graves' hyperthyroidism using mouse models. Our data show that ONX 0914 was effective prophylactically and therapeutically at suppressing the degree of intrathyroidal lymphocyte infiltration and, to a lesser degree, the titres of anti-thyroglobulin autoantibodies in non-obese diabetic (NOD)-H2(h4) mice, an iodine-induced autoimmune thyroiditis model. It also inhibited differentiation of T cells to T helper type 1 (Th1) and Th17 cells, effector T cell subsets critical for development of thyroiditis in this mouse strain. In contrast, its effect on the Graves' model was negligible. Although ONX 0914 exerts its immune-suppressive effect through not only suppression of immune proteasome but also other mechanism(s), such as inhibition of T cell differentiation, the present results suggest that the immunoproteasome is a novel drug target in treatment of Hashimoto's thyroiditis in particular and cell-mediated autoimmune diseases in general.
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Affiliation(s)
- Y Nagayama
- Department of Molecular Medicine, Atomic Bomb Disease Institute Division of Immunology, Endocrinology and Metabolism, Department of Medical and Dental Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
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Satoh JI, Tabunoki H, Arima K. Immunohistochemical Characterization of Gamma-Secretase Activating Protein (GSAP) Expression in Alzheimer's Disease Brains (P05.057). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p05.057] [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: 11/15/2022] Open
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Satoh J, Tabunoki H, Ishida T, Saito Y, Arima K. Immunohistochemical characterization of γ-secretase activating protein expression in Alzheimer's disease brains. Neuropathol Appl Neurobiol 2012; 38:132-41. [DOI: 10.1111/j.1365-2990.2011.01206.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tamai M, Kawakami A, Iwamoto N, Arima K, Aoyagi K, Eguchi K. Contribution of anti-CCP antibodies, proximal interphalangeal joint involvement, HLA-DRB1 shared epitope, and PADI4 as risk factors for the development of rheumatoid arthritis in palindromic rheumatism. Scand J Rheumatol 2010; 39:287-91. [PMID: 20476860 DOI: 10.3109/03009741003604534] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES To determine which variables at baseline are predictive for the development of rheumatoid arthritis (RA) from palindromic rheumatism (PR) in a Japanese population. METHODS Anti-cyclic citrullinated peptide (anti-CCP) antibodies, joint involvement pattern, genotypes of HLA-DRB1, peptidylarginine deiminase (PADI4), and protein tyrosine phosphatase (PTPN22) were examined in 28 patients with PR at baseline, and their clinical outcome was prospectively evaluated. The same variables were also investigated in 38 healthy controls. RESULTS Eleven out of 28 patients with PR developed RA. The prevalence of anti-CCP antibodies in the PR patients who developed RA was significantly higher compared to the patients who did not. Proximal interphalangeal (PIP) joint involvement at baseline was also predictive towards the development of RA. Compared with the controls, differences in the frequency of single-nucleotide polymorphism (SNP) on padi4_104 [T(RA susceptible)-->C(RA non-susceptible)] and the presence of an RA susceptible homozygote of the PADI4 haplotype were detected in patients with PR whereas we could not find any further difference in PR patients who developed RA compared to PR patients who do not develop RA in PADI4. None of the subjects possessed the PTPN22 SNP (1858C-->T). Cox regression analysis revealed that anti-CCP antibodies as well as PIP involvement are the most relevant variables for the development of RA from PR. None of the PR patients with either HLA-DRB1*SE alleles (or the HLA-DRB1*0405 allele) or anti-CCP antibodies developed RA. CONCLUSIONS Anti-CCP antibodies, in relation to HLA-DRB1*SE carriership, and PIP involvement are predictive for the development of RA from PR in the Japanese population.
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Affiliation(s)
- M Tamai
- Unit of Translational Medicine, Department of Immunology and Rheumatology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
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45
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Arima K, Yu J, Iwasaki S, Tamura G. Milk-clotting Enzyme from Microorganisms: V. Purification and Crystallization of Mucor Rennin from Mucor pusillus var. Lindt. Appl Microbiol 2010; 16:1727-33. [PMID: 16349823 PMCID: PMC547748 DOI: 10.1128/am.16.11.1727-1733.1968] [Citation(s) in RCA: 17] [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: 11/20/2022]
Abstract
A rennin crystal was obtained from the crude milk-clotting enzyme of Mucor pusillus var. Lindt. The crude enzyme was purified by using columns of Amberlite CG-50, diethylaminoethyl Sephadex A-50, and Sephadex G-100. This purified enzyme was dissolved in 0.1 M sodium acetate (pH 5.0) buffer to a final concentration of 2 to 3%; ammonium sulfate (to 40% saturation) was added, and the resulting solution was placed in cellophane tubes. The enzyme solution was dialyzed against 0.1 M sodium acetate buffer (pH 5) containing ammonium sulfate was added dropwise to the outside solution of the cellophane tube, and the concentration of ammonium sulfate in the cellophane tube increased gradually. The crystals of enzyme were formed in the cellophane tube when the concentration reached approximately 50% saturation. After the enzyme solution was concentrated in the freezer, the crystals were obtained. The activity of the crystalline enzyme was inhibited by Hg, Ag, Zn, and KMnO(4).
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Affiliation(s)
- K Arima
- Department of Agricultural Chemistry, Faculty of Agriculture, The University of Tokyo, Tokyo, Japan
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46
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Iwamoto N, Kawakami A, Arima K, Nakamura H, Kawashiri SY, Tamai M, Kita J, Okada A, Koga T, Kamachi M, Yamasaki S, Ichinose K, Ida H, Origuchi T, Eguchi K. Regulation of disease susceptibility and mononuclear cell infiltration into the labial salivary glands of Sjogren's syndrome by monocyte chemotactic protein-1. Rheumatology (Oxford) 2010; 49:1472-8. [DOI: 10.1093/rheumatology/keq079] [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: 11/13/2022] Open
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Shioya M, Obayashi S, Tabunoki H, Arima K, Saito Y, Ishida T, Satoh J. Aberrant microRNA expression in the brains of neurodegenerative diseases: miR-29a decreased in Alzheimer disease brains targets neurone navigator 3. Neuropathol Appl Neurobiol 2010; 36:320-30. [PMID: 20202123 DOI: 10.1111/j.1365-2990.2010.01076.x] [Citation(s) in RCA: 226] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AIMS MicroRNAs (miRNAs) are small non-coding RNAs that regulate translational repression of target mRNAs. Accumulating evidence indicates that various miRNAs, expressed in a spatially and temporally controlled that manner in the brain plays a key role in neuronal development. However, at present, the pathological implication of aberrant miRNA expression in neurodegenerative events remains largely unknown. To identify miRNAs closely associated with neurodegeneration, we performed miRNA expression profiling of brain tissues of various neurodegenerative diseases. METHODS We initially studied the frontal cortex derived from three amyotrophic lateral sclerosis patients by using a microarray of 723 human miRNAs. This was followed by enlargement of study population with quantitative RT-PCR analysis (n = 21). RESULTS By microarray analysis, we identified up-regulation of miR-29a, miR-29b and miR-338-3p in amyotrophic lateral sclerosis brains, but due to a great interindividual variation, we could not validate these results by quantitative RT-PCR. However, we found significant down-regulation of miR-29a in Alzheimer disease (AD) brains. The database search on TargetScan, PicTar and miRBase Target identified neurone navigator 3 (NAV3), a regulator of axon guidance, as a principal target of miR-29a, and actually NAV3 mRNA levels were elevated in AD brains. MiR-29a-mediated down-regulation of NAV3 was verified by the luciferase reporter assay. By immunohistochemistry, NAV3 expression was most evidently enhanced in degenerating pyramidal neurones in the cerebral cortex of AD. CONCLUSIONS These observations suggest the hypothesis that underexpression of miR-29a affects neurodegenerative processes by enhancing neuronal NAV3 expression in AD brains.
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Affiliation(s)
- M Shioya
- Department of Bioinformatics and Molecular Neuropathology, Meiji Pharmaceutical University, Kiyose, Tokyo 204-8588, Japan
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Saitoh Y, Ogawa M, Naito Y, Komatsuzaki Y, Tagaya H, Arima K, Tamaoka A, Kitamoto T, Murata M. Discordant clinicopathologic phenotypes in a Japanese kindred of fatal familial insomnia. Neurology 2010; 74:86-9. [PMID: 20038778 DOI: 10.1212/wnl.0b013e3181c7da09] [Citation(s) in RCA: 10] [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: 11/15/2022] Open
Affiliation(s)
- Y Saitoh
- Department of Neurology, National Center Hospital of Neurology and Psychiatry, 4-1-1 Ogawahigashimachi, Kodaira, Tokyo 187-8551, Japan.
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Izuhara K, Ohta S, Kanaji S, Shiraishi H, Arima K. Recent progress in understanding the diversity of the human ov-serpin/clade B serpin family. Cell Mol Life Sci 2008; 65:2541-53. [PMID: 18516497 DOI: 10.1007/s00018-008-8049-7] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The inhibitory mechanism against proteases is important in the maintenance of homeostasis or health in the body. The human ovalbumin serpin (ov-serpin)/clade B serpin family is one group of the human serpins, a family of serine protease inhibitors. They have acquired diversity in the profiles of target proteases, inhibitory mechanisms, and localization patterns during their evolution. Most serpins target serine proteases, however, some ov-serpins target only cysteine proteases or both serine and cysteine proteases and furthermore, several ov-serpins do not possess inhibitory activities. Although the ov-serpins act primarily as intracellular serpins, some show extracellular and nuclear localizations. Such diversity enables the ov-serpins to play multiple physiological roles in the body. Recent analyses have revealed that the functions of human ov-serpins are more diversified than we previously knew. In this article, we describe recent progress in our understanding of how the human ov-serpin/clade B serpin family demonstrates diversity.
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Affiliation(s)
- K Izuhara
- Department of Biomolecular Sciences, Saga Medical School, Saga, Japan.
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Hashimoto R, Hirata Y, Asada T, Yamashita F, Nemoto K, Mori T, Moriguchi Y, Kunugi H, Arima K, Ohnishi T. Effect of the brain-derived neurotrophic factor and the apolipoprotein E polymorphisms on disease progression in preclinical Alzheimer's disease. Genes Brain Behav 2008; 8:43-52. [PMID: 18786162 DOI: 10.1111/j.1601-183x.2008.00440.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Genetic factors, such as apolipoprotein E (ApoE) polymorphisms, are thought to play an important role in the etiology of Alzheimer's disease (AD). Recent association studies have suggested that the Val66Met polymorphism in the brain-derived neurotrophic factor (BDNF) gene could play a role in the development of AD. To identify genotypic effects of the BDNF and the ApoE genes on disease progression in preclinical AD, we assessed morphological changes using serial magnetic resonance imaging during the preclinical period of AD in 35 individuals. When all subjects were analyzed as one group, progressive atrophy was noted in the limbic, paralimbic and neocortical areas. Individuals of the BDNF Val/Val genotype showed progressive atrophy in the left medial temporal areas, whereas the BDNF Met allele carriers showed additional changes in the anterior cingulate cortex (ACC), posterior cingulate cortex (PCC) and the precuneus. An interaction between the BDNF genotype and progressive morphological changes was found in the PCC. The noncarriers for the ApoE epsilon4 allele showed progressive atrophy in the bilateral medial temporal areas. In addition to changes in the medial temporal areas, epsilon4 carriers showed progressive atrophy in the PCC, ACC and precuneus. An interaction between the ApoE genotype and progressive morphological change was noted in the right medial temporal area. The present preliminary study indicates that polymorphisms of the ApoE and the BDNF genes could affect disease progression in preclinical AD and implies that the Met-BDNF polymorphism could be an additional risk factor for rapid disease progression in preclinical AD.
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Affiliation(s)
- R Hashimoto
- Department of Clinical Disorder Research, The Osaka-Hamamatsu Joint Research Center For Child Mental Development, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
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