1
|
Hara T, Shimbo T, Masuda T, Kitayama T, Fujii M, Hanawa M, Yokota K, Endo M, Tomimatsu T, Kimura T, Tamai K. High-mobility group box-1 peptide ameliorates bronchopulmonary dysplasia by suppressing inflammation and fibrosis in a mouse model. Biochem Biophys Res Commun 2023; 671:357-365. [PMID: 37329659 DOI: 10.1016/j.bbrc.2023.06.032] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 06/08/2023] [Indexed: 06/19/2023]
Abstract
BACKGROUND This study aimed to examine the effect of the HMGB1 peptide on Bronchopulmonary dysplasia (BPD)-related lung injury in a mouse model. RESULTS HMGB1 peptide ameliorates lung injury by suppressing the release of inflammatory cytokines and decreasing soluble collagen levels in the lungs. Single-cell RNA sequencing showed that the peptide suppressed the hyperoxia-induced inflammatory signature in macrophages and the fibrotic signature in fibroblasts. These changes in the transcriptome were confirmed using protein assays. CONCLUSION Systemic administration of HMGB1 peptide exerts anti-inflammatory and anti-fibrotic effects in a mouse model of BPD. This study provides a foundation for the development of new and effective therapies for BPD.
Collapse
Affiliation(s)
- Takeya Hara
- Department of Obstetrics and Gynecology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Takashi Shimbo
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan; StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Suita, Osaka, Japan
| | - Tatsuo Masuda
- StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Suita, Osaka, Japan
| | - Tomomi Kitayama
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan; StemRIM Inc., Ibaraki, Osaka, Japan
| | - Makoto Fujii
- StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Suita, Osaka, Japan; Department of Children's and Women's Health, Division of Health Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | | | | | - Masayuki Endo
- Department of Obstetrics and Gynecology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan; StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Suita, Osaka, Japan; Department of Children's and Women's Health, Division of Health Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.
| | - Takuji Tomimatsu
- Department of Obstetrics and Gynecology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Tadashi Kimura
- Department of Obstetrics and Gynecology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Katsuto Tamai
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.
| |
Collapse
|
2
|
Taniguchi A, Miyashita K, Fukae S, Tanaka R, Nishida M, Kitayama T, Ouchi Y, Shimbo T, Nakazawa S, Yamanaka K, Imamura R, Tamai K, Nonomura N. Single-cell transcriptome analysis of a rat model of bilateral renal ischemia-reperfusion injury. Biochem Biophys Rep 2023; 33:101433. [PMID: 36798850 PMCID: PMC9926196 DOI: 10.1016/j.bbrep.2023.101433] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 01/19/2023] [Accepted: 01/20/2023] [Indexed: 02/04/2023] Open
Abstract
Ischemia-reperfusion injury (IRI) causes massive tissue damage. Renal IRI is the most common type of acute renal injury, and the defects caused by it may progress to chronic kidney disease (CKD). Rodent models of renal IRI, with various patterns, have been used to study the treatment of human kidney injury. A rat model of bilateral IRI, in which the bilateral kidney blood vessels are clamped for 60 min, is widely used, inducing both acute and chronic kidney disease. However, the molecular mechanisms underlying the effects of bilateral IRI on kidney cells have not yet been fully elucidated. This study aimed to perform a whole-transcriptome analysis of the IRI kidney using single-cell RNA sequencing. We found renal parenchymal cells, including those from the proximal tubule, the loop of Henle, and distal tubules, to be damaged by IRI. In addition, we observed significant changes in macrophage population. Our study delineated the detailed cellular and molecular changes that occur in the rat model of bilateral IRI. Collectively, our data and analyses provided a foundation for understanding IRI-related kidney diseases in rat models.
Collapse
Affiliation(s)
- Ayumu Taniguchi
- Department of Urology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kazuya Miyashita
- StemRIM Inc., 7-7-15, Saito-Asagi, Ibaraki, Osaka, 567-0085, Japan
| | - Shota Fukae
- Department of Urology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Ryo Tanaka
- Department of Urology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Mami Nishida
- StemRIM Inc., 7-7-15, Saito-Asagi, Ibaraki, Osaka, 567-0085, Japan
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Tomomi Kitayama
- StemRIM Inc., 7-7-15, Saito-Asagi, Ibaraki, Osaka, 567-0085, Japan
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yuya Ouchi
- StemRIM Inc., 7-7-15, Saito-Asagi, Ibaraki, Osaka, 567-0085, Japan
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Takashi Shimbo
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
- StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, 2-8 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Corresponding author. Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Shigeaki Nakazawa
- Department of Urology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kazuaki Yamanaka
- Department of Urology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Ryoichi Imamura
- Department of Urology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Katsuto Tamai
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Corresponding author.
| | - Norio Nonomura
- Department of Urology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| |
Collapse
|
3
|
Ishibashi K, Ikegami K, Shimbo T, Sasaki E, Kitayama T, Nakamura Y, Tsushima T, Ishibashi Y, Tamai K. Single-cell transcriptome analysis reveals cellular heterogeneity in mouse intra- and extra articular ligaments. Commun Biol 2022; 5:1233. [PMID: 36371589 PMCID: PMC9653455 DOI: 10.1038/s42003-022-04196-w] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 10/31/2022] [Indexed: 11/13/2022] Open
Abstract
Ligaments are collagenous connective tissues that connect bones. Injury of knee ligaments, namely anterior cruciate ligament (ACL) and medial collateral ligament (MCL), is common in athletes. Both ligaments have important functions, but distinct regeneration capacities. The capacity for recovery after injury also diminishes with age. However, cellular heterogeneity in the ligaments remains unclear. Here, we profiled the transcriptional signatures of ACL and MCL cells in mice using single-cell RNA sequencing. These ligaments comprise three fibroblast types expressing Col22a1, Col12a1, or Col14a1, but have distinct localizations in the tissue. We found substantial heterogeneity in Col12a1- and Col14a1-positive cells between ACL and MCL. Gene Ontology analysis revealed that angiogenesis- and collagen regulation-related genes were specifically enriched in MCL cells. Furthermore, we identified age-related changes in cell composition and gene expression in the ligaments. This study delineates cellular heterogeneity in ligaments, serving as a foundation for identifying potential therapeutic targets for ligament injuries. Cell heterogeneity in the mouse anterior cruciate ligament (ACL) and medial collateral ligament (MCL) is demonstrated using single-cell analysis with three types of fibroblasts identified, expressing Col14a1, Col12a1, or Col22a1.
Collapse
|
4
|
Iwayama T, Iwashita M, Miyashita K, Sakashita H, Matsumoto S, Tomita K, Bhongsatiern P, Kitayama T, Ikegami K, Shimbo T, Tamai K, Murayama MA, Ogawa S, Iwakura Y, Yamada S, Olson LE, Takedachi M, Murakami S. Plap-1 lineage tracing and single-cell transcriptomics reveal cellular dynamics in the periodontal ligament. Development 2022; 149:277273. [DOI: 10.1242/dev.201203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/05/2022] [Indexed: 01/25/2023]
Abstract
ABSTRACT
Periodontal tissue supports teeth in the alveolar bone socket via fibrous attachment of the periodontal ligament (PDL). The PDL contains periodontal fibroblasts and stem/progenitor cells, collectively known as PDL cells (PDLCs), on top of osteoblasts and cementoblasts on the surface of alveolar bone and cementum, respectively. However, the characteristics and lineage hierarchy of each cell type remain poorly defined. This study identified periodontal ligament associated protein-1 (Plap-1) as a PDL-specific extracellular matrix protein. We generated knock-in mice expressing CreERT2 and GFP specifically in Plap-1-positive PDLCs. Genetic lineage tracing confirmed the long-standing hypothesis that PDLCs differentiate into osteoblasts and cementoblasts. A PDL single-cell atlas defined cementoblasts and osteoblasts as Plap-1−Ibsp+Sparcl1+ and Plap-1−Ibsp+Col11a2+, respectively. Other populations, such as Nes+ mural cells, S100B+ Schwann cells, and other non-stromal cells, were also identified. RNA velocity analysis suggested that a Plap-1highLy6a+ cell population was the source of PDLCs. Lineage tracing of Plap-1+ PDLCs during periodontal injury showed periodontal tissue regeneration by PDLCs. Our study defines diverse cell populations in PDL and clarifies the role of PDLCs in periodontal tissue homeostasis and repair.
Collapse
Affiliation(s)
- Tomoaki Iwayama
- Osaka University Graduate School of Dentistry 1 Department of Periodontology , , Suita, Osaka 565-0871 , Japan
| | - Mizuho Iwashita
- Osaka University Graduate School of Dentistry 1 Department of Periodontology , , Suita, Osaka 565-0871 , Japan
| | | | - Hiromi Sakashita
- Osaka University Graduate School of Dentistry 1 Department of Periodontology , , Suita, Osaka 565-0871 , Japan
- StemRIM Institute of Regeneration-Inducing Medicine, Osaka University 3 , Suita 565-0871 , Japan
| | - Shuji Matsumoto
- Osaka University Graduate School of Dentistry 1 Department of Periodontology , , Suita, Osaka 565-0871 , Japan
| | - Kiwako Tomita
- Osaka University Graduate School of Dentistry 1 Department of Periodontology , , Suita, Osaka 565-0871 , Japan
| | - Phan Bhongsatiern
- Osaka University Graduate School of Dentistry 1 Department of Periodontology , , Suita, Osaka 565-0871 , Japan
| | - Tomomi Kitayama
- StemRIM Inc. 2 , Ibaraki, Osaka 567-0085 , Japan
- Osaka University Graduate School of Medicine 4 Department of Stem Cell Therapy Science , , Osaka 565-0871 , Japan
| | | | - Takashi Shimbo
- StemRIM Institute of Regeneration-Inducing Medicine, Osaka University 3 , Suita 565-0871 , Japan
- Osaka University Graduate School of Medicine 4 Department of Stem Cell Therapy Science , , Osaka 565-0871 , Japan
| | - Katsuto Tamai
- Osaka University Graduate School of Medicine 4 Department of Stem Cell Therapy Science , , Osaka 565-0871 , Japan
| | - Masanori A. Murayama
- Research Institute for Biomedical Sciences, Tokyo University of Science 5 , Noda, Chiba 278-8510 , Japan
| | - Shuhei Ogawa
- Research Institute for Biomedical Sciences, Tokyo University of Science 5 , Noda, Chiba 278-8510 , Japan
| | - Yoichiro Iwakura
- Research Institute for Biomedical Sciences, Tokyo University of Science 5 , Noda, Chiba 278-8510 , Japan
| | - Satoru Yamada
- Tohoku University Graduate School of Dentistry 6 Department of Periodontology and Endodontology , , Sendai, Miyagi 980-8575 , Japan
| | - Lorin E. Olson
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation 7 , Oklahoma City, OK 73104 , USA
| | - Masahide Takedachi
- Osaka University Graduate School of Dentistry 1 Department of Periodontology , , Suita, Osaka 565-0871 , Japan
| | - Shinya Murakami
- Osaka University Graduate School of Dentistry 1 Department of Periodontology , , Suita, Osaka 565-0871 , Japan
| |
Collapse
|
5
|
Hasegawa K, Fujimoto T, Mita C, Furumoto H, Inoue M, Ikegami K, Kitayama T, Yamamoto Y, Shimbo T, Yamazaki T, Tamai K. Single-cell transcriptome analysis of fractional CO 2 laser efficiency in treating a mouse model of alopecia. Lasers Surg Med 2022; 54:1167-1176. [PMID: 35916125 DOI: 10.1002/lsm.23590] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 07/03/2022] [Accepted: 07/16/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVES Hair loss, including alopecia, is a common dermatological issue worldwide. At present, the application of fractional carbon dioxide (CO2 ) laser in the treatment of alopecia has been documented; however, the results vary between reports. These varying results may be due to the limited knowledge of cellular action in laser-irradiated skin. The objective of this study was to investigate the molecular and cellular mechanisms of laser treatment under effective conditions for hair cycle initiation. METHODS A fractional CO2 laser was applied and optimized to initiate the hair cycle in a mouse model of alopecia. Several cellular markers were analyzed in the irradiated skin using immunofluorescence staining. Cellular populations and their comprehensive gene expression were analyzed using single-cell RNA sequencing and bioinformatics. RESULTS The effective irradiation condition for initiating the hair cycle was found to be 15 mJ energy/spot, which generates approximately 500 μm depth columns, but does not penetrate the dermis, only reaching approximately 1 spot/mm2 . The proportion of macrophage clusters significantly increased upon irradiation, whereas the proportion of fibroblast clusters decreased. The macrophages strongly expressed C-C chemokine receptor type 2 (Ccr2), which is known to be a key signal for injury-induced hair growth. CONCLUSIONS We found that fractional CO2 laser irradiation recruited Ccr2 positive macrophages, and induced hair regrowth in a mouse alopecia model. These findings may contribute to the development of stable and effective fractional laser irradiation conditions for human alopecia treatment.
Collapse
Affiliation(s)
- Kouichi Hasegawa
- Drug Discovery Department, StemRIM Incorporation, Osaka, Japan.,StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Osaka, Japan
| | | | - Chihiro Mita
- Drug Discovery Department, StemRIM Incorporation, Osaka, Japan.,StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Osaka, Japan
| | - Hidehiro Furumoto
- Drug Discovery Department, StemRIM Incorporation, Osaka, Japan.,StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Osaka, Japan
| | - Masako Inoue
- Drug Discovery Department, StemRIM Incorporation, Osaka, Japan.,StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Osaka, Japan
| | - Kentaro Ikegami
- Drug Discovery Department, StemRIM Incorporation, Osaka, Japan.,StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Osaka, Japan
| | - Tomomi Kitayama
- Drug Discovery Department, StemRIM Incorporation, Osaka, Japan.,StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Osaka, Japan.,Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yukari Yamamoto
- Drug Discovery Department, StemRIM Incorporation, Osaka, Japan.,StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Osaka, Japan
| | - Takashi Shimbo
- StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Osaka, Japan.,Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Takehiko Yamazaki
- Drug Discovery Department, StemRIM Incorporation, Osaka, Japan.,StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Osaka, Japan
| | - Katsuto Tamai
- StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Osaka, Japan.,Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Osaka, Japan
| |
Collapse
|
6
|
Takaki S, Shimbo T, Ikegami K, Kitayama T, Yamamoto Y, Yamazaki S, Mori S, Tamai K. Generation of a recessive dystrophic epidermolysis bullosa mouse model with patient-derived compound heterozygous mutations. J Transl Med 2022; 102:574-580. [PMID: 35152273 DOI: 10.1038/s41374-022-00735-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 01/04/2022] [Accepted: 01/04/2022] [Indexed: 11/09/2022] Open
Abstract
Recessive dystrophic epidermolysis bullosa (RDEB) is an intractable genetic disease of the skin caused by mutations in the COL7A1 gene. The majority of patients with RDEB harbor compound heterozygous mutations-two distinct mutations on each chromosome-without any apparent hotspots in the COL7A1 mutation pattern. This situation has made it challenging to establish a reliable RDEB mouse model with mutations that accurately mimic the genomic background of patients. Here, we established an RDEB mouse model harboring patient-type mutations in a compound heterozygous manner, using the CRISPR-based genome-editing technology i-GONAD. We selected two mutations, c.5818delC and E2857X, that have frequently been identified in cohorts of Japanese patients with RDEB. These mutations were introduced into the mouse genome at locations corresponding to those identified in patients. Mice homozygous for the 5818delC mutation developed severe RDEB-like phenotypes and died immediately after birth, whereas E2857X homozygous mice did not have a shortened lifespan compared to wild-type mice. Adult E2857X homozygous mice showed hair abnormalities, syndactyly, and nail dystrophy; these findings indicate that E2857X is indeed pathogenic in mice. Mice with the c.5818delC/E2857X compound heterozygous mutation presented an intermediate phenotype between the c.5818delC and E2857X homozygous mice. Single-cell RNA sequencing further clarified that the intrafollicular keratinocytes in c.5818delC/E2857X compound heterozygous mice exhibited abnormalities in cell cycle regulation. The proposed strategy to produce compound heterozygous mice, in addition to the established mouse line, will facilitate research on RDEB pathogenesis to develop a cure for this devastating disease.
Collapse
Affiliation(s)
- Satoshi Takaki
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan.,StemRIM Inc., Ibaraki, Osaka, Japan
| | - Takashi Shimbo
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan. .,StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Suita, Japan.
| | | | - Tomomi Kitayama
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan.,StemRIM Inc., Ibaraki, Osaka, Japan
| | | | - Sho Yamazaki
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan.,StemRIM Inc., Ibaraki, Osaka, Japan
| | - Shiho Mori
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Katsuto Tamai
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan.
| |
Collapse
|
7
|
Li YT, Yamazaki S, Takaki E, Ouchi Y, Kitayama T, Tamai K. PDGFRα-lineage origin directs monocytes to trafficking proficiency to support peripheral immunity. Eur J Immunol 2021; 52:204-221. [PMID: 34708880 PMCID: PMC9299050 DOI: 10.1002/eji.202149479] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 10/11/2021] [Accepted: 10/25/2021] [Indexed: 12/03/2022]
Abstract
Multiple embryonic precursors give rise to leukocytes in adults while the lineage‐based functional impacts are underappreciated. Mesodermal precursors expressing PDGFRα appear transiently during E7.5‐8.5 descend to a subset of Lin–Sca1+Kit+ hematopoietic progenitors found in adult BM. By analyzing a PDGFRα‐lineage tracing mouse line, we here report that PDGFRα‐lineage BM F4/80+SSClo monocytes/macrophages are solely Ly6C+LFA‐1hiMac‐1hi monocytes enriched on the abluminal sinusoidal endothelium while Ly6C–LFA‐1loMac‐1lo macrophages are mostly from non‐PDGFRα‐lineage in vivo. Monocytes with stronger integrin profiles outcompete macrophages for adhesion on an endothelial monolayer or surfaces coated with ICAM‐1‐Fc or VCAM‐1‐Fc. Egress of PDGFRα‐lineage‐rich monocytes and subsequent differentiation to peripheral macrophages spatially segregates them from non‐PDGFRα‐lineage BM‐resident macrophages and allows functional specialization since macrophages derived from these egressing monocytes differ in morphology, phenotype, and functionality from BM‐resident macrophages in culture. Extravasation preference for blood PDGFRα‐lineage monocytes varies by tissues and governs the local lineage composition of macrophages. More PDGFRα‐lineage classical monocytes infiltrated into skin and colon but not into peritoneum. Accordingly, transcriptomic analytics indicated augmented inflammatory cascades in dermatitis skin of BM‐chimeric mice harbouring only PDGFRα‐lineage leukocytes. Thus, the PDGFRα‐lineage origin biasedly generates monocytes predestined for BM exit to support peripheral immunity following extravasation and macrophage differentiation.
Collapse
Affiliation(s)
- Yu-Tung Li
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
| | | | | | | | | | - Katsuto Tamai
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
| |
Collapse
|
8
|
Nojiri S, Tsuchiya A, Natsui K, Takeuchi S, Watanabe T, Kojima Y, Watanabe Y, Kamimura H, Ogawa M, Motegi S, Iwasawa T, Sato T, Kumagai M, Ishii Y, Kitayama T, Li YT, Ouchi Y, Shimbo T, Takamura M, Tamai K, Terai S. Synthesized HMGB1 peptide attenuates liver inflammation and suppresses fibrosis in mice. Inflamm Regen 2021; 41:28. [PMID: 34565478 PMCID: PMC8474861 DOI: 10.1186/s41232-021-00177-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 08/25/2021] [Indexed: 11/20/2022] Open
Abstract
The liver has a high regenerative ability and can induce spontaneous regression of fibrosis when early liver damage occurs; however, these abilities are lost when chronic liver damage results in decompensated cirrhosis. Cell therapies, such as mesenchymal stem cell (MSC) and macrophage therapies, have attracted attention as potential strategies for mitigating liver fibrosis. Here, we evaluated the therapeutic effects of HMGB1 peptide synthesized from box A of high mobility group box 1 protein. Liver damage and fibrosis were evaluated using a carbon tetrachloride (CCl4)-induced cirrhosis mouse model. The effects of HMGB1 peptide against immune cells were evaluated by single-cell RNA-seq using liver tissues, and those against monocytes/macrophages were further evaluated by in vitro analyses. Administration of HMGB1 peptide did not elicit a rapid response within 36 h, but attenuated liver damage after 1 week and suppressed fibrosis after 2 weeks. Fibrosis regression developed over time, despite continuous liver damage, suggesting that administration of this peptide could induce fibrolysis. In vitro analyses could not confirm a direct effect of HMGB1 peptide against monocyte/macrophages. However, macrophages were the most affected immune cells in the liver, and the number of scar-associated macrophages (Trem2+Cd9+ cells) with anti-inflammatory markers increased in the liver following HMGB1 treatment, suggesting that indirect effects of monocytes/macrophages were important for therapeutic efficacy. Overall, we established a new concept for cell-free therapy using HMGB1 peptide for cirrhosis through the induction of anti-inflammatory macrophages.
Collapse
Affiliation(s)
- Shunsuke Nojiri
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Atsunori Tsuchiya
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan.
| | - Kazuki Natsui
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Suguru Takeuchi
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Takayuki Watanabe
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Yuichi Kojima
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Yusuke Watanabe
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Hiroteru Kamimura
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Masahiro Ogawa
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Satoko Motegi
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Takahiro Iwasawa
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Takeki Sato
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Masaru Kumagai
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Yui Ishii
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Tomomi Kitayama
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan.,StemRIM Inc., Saito Bio-Incubator 3F 7-7-15, Saito-Asagi, Ibaraki City, Osaka, 567-0085, Japan
| | - Yu-Tung Li
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yuya Ouchi
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan.,StemRIM Inc., Saito Bio-Incubator 3F 7-7-15, Saito-Asagi, Ibaraki City, Osaka, 567-0085, Japan
| | - Takashi Shimbo
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan.,StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, 2-8, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Masaaki Takamura
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan
| | - Katsuto Tamai
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Shuji Terai
- Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757, Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan.
| |
Collapse
|
9
|
Ho YT, Shimbo T, Wijaya E, Kitayama T, Takaki S, Ikegami K, Miyashita K, Ouchi Y, Takaki E, Yamamoto R, Kaneda Y, Tamai K. Longitudinal Single-Cell Transcriptomics Reveals a Role for Serpina3n-Mediated Resolution of Inflammation in a Mouse Colitis Model. Cell Mol Gastroenterol Hepatol 2021; 12:547-566. [PMID: 33862275 PMCID: PMC8258998 DOI: 10.1016/j.jcmgh.2021.04.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 04/05/2021] [Accepted: 04/06/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND & AIMS Proper resolution of inflammation is essential to maintaining homeostasis, which is important as a dysregulated inflammatory response has adverse consequences, even being regarded as a hallmark of cancer. However, our picture of dynamic changes during inflammation remains far from comprehensive. METHODS Here we used single-cell transcriptomics to elucidate changes in distinct cell types and their interactions in a mouse model of chemically induced colitis. RESULTS Our analysis highlights the stromal cell population of the colon functions as a hub with dynamically changing roles over time. Importantly, we found that Serpina3n, a serine protease inhibitor, is specifically expressed in stromal cell clusters as inflammation resolves, interacting with a potential target, elastase. Indeed, genetic ablation of the Serpina3n gene delays resolution of induced inflammation. Furthermore, systemic Serpina3n administration promoted the resolution of inflammation, ameliorating colitis symptoms. CONCLUSIONS This study provides a comprehensive, single-cell understanding of cell-cell interactions during colorectal inflammation and reveals a potential therapeutic target that leverages inflammation resolution.
Collapse
Affiliation(s)
- Yen-Ting Ho
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Takashi Shimbo
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Edward Wijaya
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
- StemRIM Inc, Ibaraki, Osaka, Japan
| | - Tomomi Kitayama
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
- StemRIM Inc, Ibaraki, Osaka, Japan
| | - Satoshi Takaki
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
| | | | | | - Yuya Ouchi
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
- StemRIM Inc, Ibaraki, Osaka, Japan
| | - Eiichi Takaki
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
- StemRIM Inc, Ibaraki, Osaka, Japan
| | - Ryoma Yamamoto
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
- StemRIM Inc, Ibaraki, Osaka, Japan
| | - Yasufumi Kaneda
- Division of Gene Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Katsuto Tamai
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
| |
Collapse
|
10
|
Miura A, Shimbo T, Kitayama T, Ouchi Y, Yamazaki S, Nishida M, Takaki E, Yamamoto R, Wijaya E, Tamai K. Contribution of PDGFRα lineage cells in adult mouse hematopoiesis. Biochem Biophys Res Commun 2020; 534:186-192. [PMID: 33309273 DOI: 10.1016/j.bbrc.2020.11.114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 11/27/2020] [Indexed: 12/31/2022]
Abstract
Platelet-derived growth factor receptor alpha (PDGFRα) is a dominant marker of mesodermal mesenchymal cells in mice. Previous studies demonstrated that PDGFRα-positive (PDGFRα+) mesodermal cells develop not only into mesenchymal cells but also into a subset of total hematopoietic cells (HCs) in the limited period during mouse embryogenesis. However, the precise characteristics of the PDGFRα lineage positive (PDGFRα Lin+) HCs in adult mouse hematopoiesis are largely unknown. In this study, we systematically evaluated the characteristics of PDGFRα Lin+ HCs in the bone marrow and peripheral blood using PDGFRα-CRE; ROSAtdTomato mice. Flow cytometry analysis revealed that PDGFRα Lin+ HCs accounted for approximately 20% of total HCs in both the bone marrow and peripheral blood in adult mice. Compositions of myeloid and lymphoid subpopulations among CD45+ mononuclear cells were almost identical in both PDGFRα Lin+ and PDGFRα Lin- cells. Single-cell RNA-sequencing analysis also demonstrated that the transcriptomic signatures of the PDGFRα Lin+ HCs in the peripheral blood largely overlapped with those of the PDGFRα Lin- HCs, suggesting equivalent functions of the PDGFRα Lin+ and PDGFRα Lin- HCs. Although pathophysiological activities of the PDGFRα Lin + HCs were not evaluated, our data clearly demonstrate a significant role of the PDGFRα Lin + HCs in physiological hematopoiesis in adult mice.
Collapse
Affiliation(s)
- Asaka Miura
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan
| | - Takashi Shimbo
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan; StemRIM Institute of Regeneration-Inducing Medicine, Osaka University, Suita, 565-0871, Japan
| | - Tomomi Kitayama
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan; StemRIM Co., Ltd., Ibaraki, Osaka, 567-0085, Japan
| | - Yuya Ouchi
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan; StemRIM Co., Ltd., Ibaraki, Osaka, 567-0085, Japan
| | - Sho Yamazaki
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan; StemRIM Co., Ltd., Ibaraki, Osaka, 567-0085, Japan
| | - Mami Nishida
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan; StemRIM Co., Ltd., Ibaraki, Osaka, 567-0085, Japan
| | - Eiichi Takaki
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan; StemRIM Co., Ltd., Ibaraki, Osaka, 567-0085, Japan
| | - Ryoma Yamamoto
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan; StemRIM Co., Ltd., Ibaraki, Osaka, 567-0085, Japan
| | - Edward Wijaya
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan; StemRIM Co., Ltd., Ibaraki, Osaka, 567-0085, Japan
| | - Katsuto Tamai
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, 565-0871, Japan.
| |
Collapse
|
11
|
Shimbo T, Yamazaki S, Kitayama T, Ouchi Y, Yamamoto R, Takaki E, Bruckner-Tuderman L, Uitto J, Kaneda Y, Tamai K. 579 Single cell transcriptome and epigenome analyses in a murine model of dystrophic epidermolysis bullosa. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.583] [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: 11/25/2022]
|
12
|
Okada A, Shimbo T, Endo M, Iwai S, Kitayama T, Ouchi Y, Yamamoto R, Takaki E, Yamazaki S, Nishida M, Wang X, Kikuchi Y, Tomimatsu T, Kaneda Y, Kimura T, Tamai K. Transcriptionally distinct mesenchymal stem/stromal cells circulate in fetus. Biochem Biophys Res Commun 2019; 512:326-330. [PMID: 30890337 DOI: 10.1016/j.bbrc.2019.03.033] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 03/06/2019] [Indexed: 10/27/2022]
Abstract
Umbilical cord blood contains mesenchymal stem/stromal cells (MSCs) in addition to hematopoietic stem cells, serving as an attractive tool for regenerative medicine. As umbilical cord blood originates from fetus, abundant MSCs are expected to circulate in fetus. However, the properties of circulating MSCs in fetus have not been fully examined. In the present study, we aimed to analyze circulating MSCs, marked by the expression of platelet-derived growth factor receptor α (PDGFRα), during fetal development. Using PDGFRα GFP knock-in mice, we quantified the number of circulating PDGFRα positive MSCs during development. We further performed whole transcriptome analysis of circulating MSCs at single cell levels. We found that abundant PDGFRα positive cells circulate in embryo and diminish immediately after birth. In addition, single cell RNA-sequencing revealed transcriptional heterogeneity of MSCs in fetal circulation. These data lay a foundation to analyze the function of circulating MSCs during development.
Collapse
Affiliation(s)
- Aiko Okada
- Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Takashi Shimbo
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Masayuki Endo
- Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
| | - Sayuri Iwai
- Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Tomomi Kitayama
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan; StemRIM Co., Ltd., Ibaraki, Japan
| | - Yuya Ouchi
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan; StemRIM Co., Ltd., Ibaraki, Japan
| | - Ryoma Yamamoto
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan; StemRIM Co., Ltd., Ibaraki, Japan
| | - Eiichi Takaki
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan; StemRIM Co., Ltd., Ibaraki, Japan
| | - Sho Yamazaki
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan; StemRIM Co., Ltd., Ibaraki, Japan
| | - Mami Nishida
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan; StemRIM Co., Ltd., Ibaraki, Japan
| | - Xin Wang
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan; StemRIM Co., Ltd., Ibaraki, Japan
| | - Yasushi Kikuchi
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Takuji Tomimatsu
- Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yasufumi Kaneda
- Division of Gene Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Tadashi Kimura
- Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Katsuto Tamai
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Suita, Japan.
| |
Collapse
|
13
|
Shimbo T, Sasaki E, Kitayama T, Yamazaki S, Nishida M, Ouchi Y, Yamamoto R, Bruckner-Tuderman L, Uitto J, Kikuchi Y, Katayama I, Kaneda Y, Tamai K. 843 Systemic delivery of HMGB1 promotes tissue regeneration by activating PDGFRα cells in a mouse model of epidermolysis bullosa. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.853] [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] [Indexed: 10/17/2022]
|
14
|
Shimbo T, Nishida M, Kitayama T, Yamamoto R, Takaki E, Kikuchi Y, Kaneda Y, Tamai K. 671 Comprehensive analysis on HMGB1-induced circulating cells during cutaneous tissue regeneration. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.07.348] [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: 10/18/2022]
|
15
|
Kanegae M, Kou S, Okawa Y, Kobayashi H, Ohmo T, Ohki T, Kitayama T. Ultrasonic Degradation of High Molecular Weight Components of Gelatin. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/00223638.1992.11737203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
16
|
Abstract
Abstract
We developed a method to determine the characteristics of a press machine required for the injection-press molding process. In this paper, a model based on a serial spring connecting two different springs was used. One was spring represented apparent machine rigidity and the other the resistance to compression of the resin. Using this model, we calculated the flow between parallel plates and flow behavior in a “tray” mold.
Collapse
Affiliation(s)
- M. Tsutsubuchi
- Plastics Technical Center, Sumitomo Chemical, Plastics Technical Center, Chiba, Japan
| | - T. Kitayama
- Plastics Technical Center, Sumitomo Chemical, Plastics Technical Center, Chiba, Japan
| | - Y. Togawa
- Plastics Technical Center, Sumitomo Chemical, Plastics Technical Center, Chiba, Japan
| | - T. Nishio
- Plastics Technical Center, Sumitomo Chemical, Plastics Technical Center, Chiba, Japan
| | | |
Collapse
|
17
|
Motoyama N, Morita K, Kitayama T, Shiraishi S, Uezono Y, Nishimura F, Kanematsu T, Dohi T. Pain-releasing action of Platelet-activating factor (PAF) antagonists in neuropathic pain animal models and the mechanisms of action. Eur J Pain 2013; 17:1156-67. [DOI: 10.1002/j.1532-2149.2013.00289.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/21/2012] [Indexed: 11/09/2022]
Affiliation(s)
| | | | - T. Kitayama
- Department of Dental Pharmacology; Hiroshima University Graduate School of Biomedical Sciences; Hiroshima; Japan
| | - S. Shiraishi
- Cancer Pathophysiology; Division National Cancer Center Research Institute; Tokyo; Japan
| | - Y. Uezono
- Cancer Pathophysiology; Division National Cancer Center Research Institute; Tokyo; Japan
| | - F. Nishimura
- Department of Dental Science for Health Promotion; Hiroshima University Graduate School of Biomedical Sciences; Japan
| | - T. Kanematsu
- Department of Dental Pharmacology; Hiroshima University Graduate School of Biomedical Sciences; Hiroshima; Japan
| | - T. Dohi
- Department of Pharmacotherapy; Pharmaceutical Sciences; Nihon Pharmaceutical University; Saitama; Japan
| |
Collapse
|
18
|
Nakamura S, Kawai N, Ohnuki Y, Saeki Y, Korfage JAM, Langenbach GEJ, Kitayama T, Watanabe M, Sano R, Tanne K, Tanaka E. Changes in activity and structure of jaw muscles in Parkinson's disease model rats. J Oral Rehabil 2013; 40:205-13. [DOI: 10.1111/joor.12030] [Citation(s) in RCA: 8] [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] [Accepted: 12/18/2012] [Indexed: 11/29/2022]
Affiliation(s)
- S. Nakamura
- Department of Orthodontics and Dentofacial Orthopedics; The University of Tokushima Graduate School of Oral Sciences; Tokushima Japan
| | - N. Kawai
- Department of Orthodontics and Dentofacial Orthopedics; The University of Tokushima Graduate School of Oral Sciences; Tokushima Japan
| | - Y. Ohnuki
- Department of Physiology; Tsurumi University School of Dental Medicine; Yokohama Japan
| | - Y. Saeki
- Department of Physiology; Tsurumi University School of Dental Medicine; Yokohama Japan
| | - J. A. M. Korfage
- Department of Oral Cell Biology and Functional Anatomy; Academic Centre for Dentistry Amsterdam (ACTA); Research Institute MOVE; University of Amsterdam and VU University Amsterdam; Amsterdam The Netherlands
| | - G. E. J. Langenbach
- Department of Oral Cell Biology and Functional Anatomy; Academic Centre for Dentistry Amsterdam (ACTA); Research Institute MOVE; University of Amsterdam and VU University Amsterdam; Amsterdam The Netherlands
| | - T. Kitayama
- Department of Dental Pharmacology; Hiroshima University Graduate School of Biomedical Sciences; Hiroshima Japan
| | - M. Watanabe
- Department of Oral Biology; Hiroshima University Graduate School of Biomedical Sciences; Hiroshima Japan
| | - R. Sano
- Department of Orthodontics and Craniofacial Developmental Biology; Hiroshima University Graduate School of Biomedical Sciences; Hiroshima Japan
| | - K. Tanne
- Department of Orthodontics and Craniofacial Developmental Biology; Hiroshima University Graduate School of Biomedical Sciences; Hiroshima Japan
| | - E. Tanaka
- Department of Orthodontics and Dentofacial Orthopedics; The University of Tokushima Graduate School of Oral Sciences; Tokushima Japan
| |
Collapse
|
19
|
Ichiki M, Sakai Y, Nango M, Nakamura K, Matsui H, Cho H, Kitayama T, Sahara T, Otani N, Inoue Y, Miki Y. Experimental venous thrombi: MRI characteristics with histopathological correlation. Br J Radiol 2012; 85:331-8. [PMID: 22457401 DOI: 10.1259/bjr/37592039] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVES The purpose of this study was to evaluate the MRI characteristics of venous thrombus over set time thresholds with histopathological correlation in a porcine model. METHODS Inferior vena cava thrombi were induced in 12 pigs. MRI was performed in three pigs 2 h, 1 day, 3 days and 2 weeks after thrombus induction. RESULTS The MRI characteristics were analysed in correlation with histopathological findings. The thrombi after 2 hours, which consisted of red blood cells (RBCs), showed isointensity on T(1 )weighted images (T(1)WIs) and hyperintensity on both T(2 )weighted images (T(2)WIs) and diffusion-weighted images (DWIs). The mean apparent diffusion coefficient (ADC) value was 1.93 × 10(-3) mm(2) s(-1). The thrombi after Day 1, which consisted of RBCs and migrating neutrophils at the periphery, showed isointensity on T(1)WIs, slight hyperintensity on T(2)WIs and hypointensity on DWIs. The mean ADC value was 1.62 × 10(-3) mm(2) s(-1) [corrected]. The thrombi after Day 3, which consisted of RBCs and peripheral inflammatory cells including macrophages, showed isointensity with peripheral hyperintense regions on T(1)WIs and hypointensity on both T(2)WIs and DWIs. The mean ADC value was 1.67 × 10(-3) mm(2) s(-1). After 2 weeks, the thrombi, which revealed RBC lysis surrounded by granulation tissues, showed isointensity on T(1)WIs and hyperintensity on T(2)WIs and DWIs. The mean ADC value was 2.48 × 10(-3) mm(2) s(-1). CONCLUSION The temporal MRI characteristics seemed to be related to chemical and physical changes in RBC and organisation of granulation tissues. Free radicals generated by macrophages might also be related to some extent.
Collapse
Affiliation(s)
- M Ichiki
- Department of Radiology, Osaka City University Graduate School of Medicine, Abeno-ku, Osaka, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Fujita S, Kitayama T, Mizoguchi N, Oi Y, Koshikawa N, Kobayashi M. Spatiotemporal profiles of transcallosal connections in rat insular cortex revealed by in vivo optical imaging. Neuroscience 2012; 206:201-11. [DOI: 10.1016/j.neuroscience.2012.01.014] [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] [Received: 10/17/2011] [Revised: 01/06/2012] [Accepted: 01/07/2012] [Indexed: 11/26/2022]
|
21
|
Abstract
Volunteers inoculated nasopharyngeally with liver A2/AA/6/60 virus grown in primary bovine kidney cell cultures at 25 C were asymptomatic but developed significant serum and respiratory secretory antibody responses. Viruses were not recovered from these volunteers who had a low or moderate level of prevaccination antibody titers.
Collapse
Affiliation(s)
- T Kitayama
- Division of Infectious Diseases, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland 21201
| | | | | | | |
Collapse
|
22
|
Kanai S, Kitayama T, Yonezawa N, Sawano Y, Tanokura M, Nakano M. Disulfide linkage patterns of pig zona pellucida glycoproteins ZP3 and ZP4. Mol Reprod Dev 2008; 75:847-56. [DOI: 10.1002/mrd.20836] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
23
|
Song L, Kitayama T, Morita K, Morioka N, Dohi T. Down-regulation of norepinephrine transporter expression on membrane surface induced by chronic administration of desipramine and the antagonism by co-administration of local anesthetics in mice. Neurochem Int 2007; 52:826-33. [PMID: 17981365 DOI: 10.1016/j.neuint.2007.09.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2007] [Revised: 09/20/2007] [Accepted: 09/21/2007] [Indexed: 12/01/2022]
Abstract
We have previously shown that chronic administration of the antidepressant desipramine, a norepinephrine transporter (NET) inhibitor to mice markedly enhanced convulsions induced by local anesthetics and that behavioral sensitization may be relevant to decreased [(3)H]norepinephrine uptake by the isolated hippocampus. The co-administration of local anesthetics with desipramine reversed the behavioral sensitization and down-regulation of NET function induced by desipramine. The present study aimed to elucidate whether chronic treatment with desipramine regulates the expression of NET protein examined in membrane fractions in various brain regions and whether co-administration of local anesthetics affects the desipramine-induced alteration of NET expression. Desipramine with or without local anesthetics was injected intraperitoneally once a day for 5 days. The animals were decapitated 48 h after the last administration of drugs and the whole cell fraction, membrane fraction and cell-surface protein fraction were prepared. [(3)H]nisoxetine binding was significantly reduced in the P2 fraction of the hippocampus by chronic administration of desipramine, and the reduction was overcome by co-administration of lidocaine with desipramine. Immunoreactive NET was detected by SDS-PAGE and immunoblotting in the murine hippocampus. NET protein expression in the whole cell fraction and membrane fraction was not affected by treatment with any drugs. However, administration of desipramine significantly reduced the amount of immunoreactive NET in the cell-surface protein fraction. This reduction was blocked by simultaneous injection of lidocaine, bupivacaine or tricaine. These results indicate that the NET down-regulation indicated by the reduction of [(3)H]nisoxetine binding was induced by administration of desipramine via decrease of NET localization on the cell surface. The antagonistic actions of local anesthetics against NET down-regulation by desipramine were related to alterations of the cell-surface localization of NET.
Collapse
Affiliation(s)
- L Song
- Department of Dental Pharmacology, Division of Integrated Medical Science, Hiroshima University Graduate School of Biomedical Science, Kasumi 1-2-3, Mimami-ku, Hiroshima 734-8553, Japan
| | | | | | | | | |
Collapse
|
24
|
Hess M, Jones RG, Kahovec J, Kitayama T, Kratochvíl P, Kubisa P, Mormann W, Stepto RFT, Tabak D, Vohlídal J, Wilks ES. Terminology of polymers containing ionizable or ionic groups and of polymers containing ions (IUPAC Recommendations 2006). PURE APPL CHEM 2006. [DOI: 10.1351/pac200678112067] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This document defines the terms most commonly encountered in the field of polymers containing ionizable or ionic groups and polymers containing ions. The scope of the document has been limited to organic polymers. Inorganic materials, such as certain phosphates, silicates, etc., which also may be considered ionic polymers, are excluded from the present document. The terms selected are those that are widely used in the field of polymers containing ionizable or ionic groups and polymers containing ions. Only those terms that could be defined without ambiguity are considered. The terms are listed in alphabetical order, and cross-references to definitions given in other documents are provided.
Collapse
Affiliation(s)
- M. Hess
- 1Universität Duisburg-Essen, Duisburg, Germany
| | | | - J. Kahovec
- 3Ústav Makromolekulární Chemie, Akademie věd České Republiky, Praha, Czech Republic
| | | | - P. Kratochvíl
- 3Ústav Makromolekulární Chemie, Akademie věd České Republiky, Praha, Czech Republic
| | - P. Kubisa
- 5Centrum Badan Molek. i Makromolek., Polska Akademia Nauk, Lódz, Poland
| | - W. Mormann
- 6Universität Gesamthochschule Siegen, Siegen, Germany
| | | | - D. Tabak
- 8Praca Pio X, Candelaria, Rio de Janeiro, Brazil
| | | | - E. S. Wilks
- 10113 Meriden Drive, Canterbury Hills, Hockessin, DE 19707, USA
| |
Collapse
|
25
|
Nagao K, Takahara Y, Asai H, Hayashi N, Kitayama T, Yoshimura Y, Yokota H, Kita K. Dietary Fatty Acid Supplementation during Transitional Period Increases Milk Production in Dairy Cows. Asian Australas J Anim Sci 2005. [DOI: 10.5713/ajas.2005.1105] [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] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
26
|
Arata J, Ishikawa K, Soeda H, Kitayama T. Replantation of multi-level fingertip amputation using the pocket principle (palmar pocket method). Br J Plast Surg 2003; 56:504-8. [PMID: 12890466 DOI: 10.1016/s0007-1226(03)00196-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Two cases of multi-level fingertip amputation are presented. In each case, replantation was achieved in a two-stage procedure, involving reattachment, de-epithelialisation and insertion into a palmar pocket in stage 1, followed by removal from the palmar pocket 16 days later. The cases are described and the technique is discussed.
Collapse
Affiliation(s)
- J Arata
- Department of Plastic and Reconstructive Surgery, Kyowa Hospital, 30 Kawakubo-cho Daigo, Fushimiku, Kyoto 6011378, Japan.
| | | | | | | |
Collapse
|
27
|
|
28
|
Fukushima K, Ogawa H, Takahashi K, Naito H, Funayama Y, Kitayama T, Yonezawa H, Sasaki I. Non-pathogenic bacteria modulate colonic epithelial gene expression in germ-free mice. Scand J Gastroenterol 2003; 38:626-34. [PMID: 12825871 DOI: 10.1080/00365510310000376] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND We established a bacterial reconstitution model to investigate epithelial cell-luminal bacteria interaction. The aim of the study was to identify the known genes directly or indirectly modulated by non-pathologic bacterial flora in the colonic epithelia of germ-free mice. METHODS Germ-free mice were orally given a bacterial suspension prepared from specific pathogen-free counterparts (bacterial reconstitution). Colonic epithelial cells were isolated, then total and poly (A) RNA were extracted. We investigated differential gene expression in colonic epithelial cells among germ-free, bacteria-reconstituted, and specific pathogen-free mice by DNA microarray. Finally, differential expression was confirmed by Northern blot or quantitative RT-PCR. RESULTS Thirty genes were initially selected as differentially expressed genes in DNA microarray analysis. We confirmed that genes associated with growth (Reg IIIbeta, Reg IIIgamma, guanylate nucleotide binding protein 2), apoptosis (Bcl-associated death promotor), cytoskeleton (tubulin alpha4, erythrocyte protein band 7.2), and immune response (lymphocyte antigen complex 6) were induced by bacterial reconstitution. In contrast, genes possibly participating in extracellular oxidant defence (selenoprotein P, metallothionein 1) and cellular metabolism (cytochrome P450, HMGCoA synthase 2, alcohol dehydrogenase 1 complex, aldehyde dehydrogenase family 1, carbonic anhydrase 1, glycoprotein galactosyltransferase alpha1,3) were down-regulated by bacterial challenge. CONCLUSION Non-pathogenic bacteria modulated colonic gene expression in germ-free mice, suggesting that non-pathogenic bacteria possibly initiate epithelial change in genetically normal and/or abnormal hosts. The present study provides a basis for the functional study of each molecule in symbiosis with luminal bacteria in healthy and diseased colon.
Collapse
Affiliation(s)
- K Fukushima
- Dept. of Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryomaci, Aoba-ku, Sendai, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Bamba T, Fukusaki E, Nakazawa Y, Sato H, Ute K, Kitayama T, Kobayashi A. Analysis of long-chain polyprenols using supercritical fluid chromatography and matrix-assisted laser desorption ionization time-of-flight mass spectrometry. J Chromatogr A 2003; 995:203-7. [PMID: 12800936 DOI: 10.1016/s0021-9673(03)00498-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [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: 11/18/2022]
Abstract
The separation of long-chain polyprenols was successfully achieved using supercritical fluid chromatography (SFC). Each 100-mer greater component was separated using tetrahydrofuran as a mobile phase modifier. The molecular mass distributions derived from SFC analyses agreed with the results of matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS) analyses. The number-average molecular mass calculated by MALDI-TOF-MS data were also in accord with the results of quantitative 1H-NMR analysis of terminal groups. A combination of SFC and MALDI-TOF-MS analyses is a powerful tool for the elucidation of the complicated structures of natural polyprenols.
Collapse
Affiliation(s)
- T Bamba
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | | | | | | | | | | | | |
Collapse
|
30
|
Marubayashi S, Okada K, Fukuma K, Tashiro H, Kitayama T, Hayamizu K, Dohi K, Asahara T. Effect of lazaroids on NF-kappa B activation of Kupffer cells in liver preservation. Transplant Proc 2002; 34:2662-3. [PMID: 12431566 DOI: 10.1016/s0041-1345(02)03466-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- S Marubayashi
- Department of Blood Purification, Hiroshima University School of Medicine, Hiroshima, Japan
| | | | | | | | | | | | | | | |
Collapse
|
31
|
Hayamizu K, Egi H, Ohmori I, Kitayama T, Asahara T. Improvement of heart allograft acceptability by pretreatment of donors with granulocyte colony-stimulating factor. Transplant Proc 2002; 34:2732. [PMID: 12431589 DOI: 10.1016/s0041-1345(02)03390-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- K Hayamizu
- Department of Surgery II, Hiroshima University Faculty of Medicine, Hiroshima, Japan.
| | | | | | | | | |
Collapse
|
32
|
Hatada K, Kahovec J, Barón M, Horie K, Kitayama T, Kubisa P, Moss GP, Stepto RFT, Wilks ES. Definitions relating to stereochemically asymmetric polymerizations (IUPAC Recommendations 2001). PURE APPL CHEM 2002. [DOI: 10.1351/pac200274060915] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Asymmetric polymerization has been of interest to many academic and industrial polymer scientists, but no reference has been made by IUPAC explicitly to classification and definitions of reactions involving the asymmetric synthesis of polymers. This document presents definitions concerned with asymmetric and related polymerizations, with examples included to clarify the meaning of the definitions. Asymmetric polymerizations embrace two main categories, "asymmetric chirogenic polymerizations" and "asymmetric enantiomer-differentiating polymerizations".
Collapse
Affiliation(s)
- K. Hatada
- 1Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikane-yama 1-3, Toyonaka, Osaka 560-8531, Japan
| | - J. Kahovec
- 2Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Praha 6, Czech Republic
| | - Máximo Barón
- 3Facultad de Ciências Exactas y Naturales, Universidad de Belgrano, Villanueva 1324, Buenos Aires, 1426 Argentina
| | - K. Horie
- 4Department of Organic & Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei-shi, Tokyo, 184-8588 Japan
| | - T. Kitayama
- 5Department of Chemistry, Osaka University, Graduate School of Engineering Science, Toyonaka, Osaka, 560-8531 Japan
| | - P. Kubisa
- 6Centrum Badan Molek. i Makromolek., Polska Akademia Nauk, Sienkiewicza 112, PL-90 363 Lódz, Poland
| | - G. P. Moss
- 7Department of Chemistry, Queen Mary, University of London, Mile End Road, London, E1 4NS, UK
| | - R. F. T. Stepto
- 8Polymer Science and Technology Group (MMSC), University of Manchester and UMIST, Grosvenor Street, Manchester, M1 7HS, UK
| | - E. S. Wilks
- 9113 Meriden Drive, Canterbury Hills, Hockessin, DE 19707, USA
| |
Collapse
|
33
|
Mikata Y, Shinohara Y, Yoneda K, Nakamura Y, Brudziñska I, Tanase T, Kitayama T, Takagi R, Okamoto T, Kinoshita I, Doe M, Orvig C, Yano S. Unprecedented sugar-dependent in vivo antitumor activity of carbohydrate-pendant cis-diamminedichloroplatinum(II) complexes. Bioorg Med Chem Lett 2001; 11:3045-7. [PMID: 11714607 DOI: 10.1016/s0960-894x(01)00623-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [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: 11/21/2022]
Abstract
Eight carbohydrate-pendant platinum(II) complexes have been synthesized from carbohydrate-diamine conjugates. D-Glucose, D-mannose, D-galactose, D-xylose, and L-glucose are attached to the dichloroplatinum(II) moiety by 1,3- or 1,2-diaminopropane chelates through with an O-glycoside bond. All the carbohydrate moieties reduced the toxicity inherent with platinum(II) complexes.
Collapse
Affiliation(s)
- Y Mikata
- KYOUSEI Science Center, Nara Women's University, Nara 630-8506, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Yamamoto K, Kitayama T, Minagawa S, Watanabe T, Sawada S, Okamoto T, Utsumi R. Antibacterial agents that inhibit histidine protein kinase YycG of Bacillus subtilis. Biosci Biotechnol Biochem 2001; 65:2306-10. [PMID: 11758928 DOI: 10.1271/bbb.65.2306] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [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
We demonstrated in vitro that YycG-YycF of Bacillus subtilis constitutes a two-component system and shows a specificity of the sensor protein for the cognate phosphorylation partner. Based on inhibition of such an autophosphorylation of YycG, we searched imidazole and zerumbone derivatives to identify the antibacterial agents such as NH125, NH126, NH127, and NH0891.
Collapse
Affiliation(s)
- K Yamamoto
- Department of Agricultural Chemistry, Kinki University, Nara, Japan
| | | | | | | | | | | | | |
Collapse
|
35
|
Kitayama T, Yamamoto K, Utsumi R, Takatani M, Hill RK, Kawai Y, Sawada S, Okamoto T. Chemistry of zerumbone. 2. Regulation of ring bond cleavage and unique antibacterial activities of zerumbone derivatives. Biosci Biotechnol Biochem 2001; 65:2193-9. [PMID: 11758909 DOI: 10.1271/bbb.65.2193] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [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
Further investigation of the chemistry of the eleven-membered cyclic sesquiterpene, zerumbone, the major component of the wild ginger, Zingiber zerumbet Smith, has revealed a new selective epoxidation process, a further example of a novel Favorskii-initiated double ring contraction, and a regiospecific fragmentation of zerumbone dibromide derivatives. Several zerumbone derivatives were found to be selective inhibitors of the growth of gram-positive bacteria.
Collapse
Affiliation(s)
- T Kitayama
- Department of Agricultural Chemistry, Faculty of Agriculture, Kinki University, Nara, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Mikata Y, Shinohara Y, Yoneda K, Nakamura Y, Esaki K, Tanahashi M, Brudziñska I, Hirohara S, Yokoyama M, Mogami K, Tanase T, Kitayama T, Takashiba K, Nabeshima K, Takagi R, Takatani M, Okamoto T, Kinoshita I, Doe M, Hamazawa A, Morita M, Nishida F, Sakakibara T, Orvig C, Yano S. Sugar-pendant diamines. J Org Chem 2001; 66:3783-9. [PMID: 11374998 DOI: 10.1021/jo001702+] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [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: 11/29/2022]
Abstract
A set of 1,3-propanediamine derivatives connected to carbohydrates (5) has been prepared in four steps from peracetylated sugar and 1,3-dibromo-2-propanol in 60-73% yields. D-Glucose, D-mannose, D-galactose, D-xylose, D-ribose, and maltose are utilized as sugar molecules in this work. The diamine moiety was connected to the C1 carbon of the glycopyranose ring via an O-glycoside bond. All of the anomeric configurations and sugar puckering conformations, except in the D-maltose derivative, were determined by X-ray crystallography of the diazido or dibromo precursors. While glycosidation of peracetylated galactopyranose with 1,3-dibromo-2-propanol in the presence of boron trifluoride afforded both anomers, the neighboring group participation of the 2-acetoxy group yielded a single anomer for the other substrates. This method has been used to synthesize a library of sugar-pendant diamines including an OH-protected derivative (6), and an N,N'-diisopropyl-substituted derivative (7). A similar series of reactions using 2,3-dibromo-1-propanol gave ethylenediamine-type derivatives (11), and bis(bromomethyl)bis(hydroxymethyl)methane (12) gave bisglucose-pendant derivatives (16).
Collapse
Affiliation(s)
- Y Mikata
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Hashimoto A, Funayama Y, Naito H, Fukushima K, Shibata C, Naitoh T, Shibuya K, Koyama K, Takahashi K, Ogawa H, Satoh S, Ueno T, Kitayama T, Matsuno S, Sasaki I. Laparascope-assisted versus conventional restorative proctocolectomy with rectal mucosectomy. Surg Today 2001; 31:210-4. [PMID: 11318122 DOI: 10.1007/s005950170170] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [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: 11/29/2022]
Abstract
To assess the advantages of a laparoscope-assisted proctocolectomy with ileal J-pouch anal anastomosis compared with conventional procedures, we retrospectively analyzed the results of the two procedures as follows: Eleven patients including five patients with familial adenomatous polyposis (FAP) and six with ulcerative colitis (UC) underwent a laparoscope-assisted proctocolectomy and hand-sewn ileal J-pouch anal anastomosis at our department from June 1997 to November 1999. This laparoscope-assisted colectomy (LAC) group was then compared with a group of 13 patients who had undergone conventional ileal pouch anal anastomosis using a standard laparotomy from 1986 to 1997. The median operative time of the LAC group was 8h 23min, which was 81 min longer than that of the standard colectomy (SC) group. The number of days during which eating was prohibited were similar in the two groups but the median postoperative hospital stay was significantly shorter in the LAC group (24.1 days). In the LAC group, the small incisions showed better cosmetic results and there was also a remarkable reduction in the degree of postoperative pain. In conclusion, a laparoscope-assisted proctocolectomy with ileal J-pouch anal anastomosis can be employed widely in patients with FAP and also in selected patients with UC.
Collapse
Affiliation(s)
- A Hashimoto
- First Department of Surgery, Tohoku University School of Medicine, Sendai, Miyagi, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Bamba T, Fukusaki E, Kajiyama S, Ute K, Kitayama T, Kobayashi A. The occurrence of geometric polyprenol isomers in the rubber-producing plant, Eucommia ulmoides Oliver. Lipids 2001; 36:727-32. [PMID: 11521971 DOI: 10.1007/s11745-001-0778-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [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: 11/30/2022]
Abstract
The chain length and geometric isomerism of polyprenols from Eucommia ulmoides Oliver were analyzed using supercritical fluid chromatography. After intensive effort to establish separation conditions for geometric isomers, a phenyl-bonded silica gel-packed column was found that cleanly separated poly-trans and -cis prenols. The presence of long-chain poly-trans prenols (>9 mers) was confirmed for the first time in plants. Trans isomers were found in the leaf, seed coat, and root, but not in the bark and seed. Poly-trans prenols in this plant may act as intermediates for trans-polyisoprene biosynthesis.
Collapse
Affiliation(s)
- T Bamba
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Japan
| | | | | | | | | | | |
Collapse
|
39
|
Yoneda Y, Kuramoto N, Kitayama T, Hinoi E. Consolidation of transient ionotropic glutamate signals through nuclear transcription factors in the brain. Prog Neurobiol 2001; 63:697-719. [PMID: 11165002 DOI: 10.1016/s0301-0082(00)00036-8] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [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: 01/09/2023]
Abstract
Long-lasting alterations of neuronal functions could involve mechanisms associated with consolidation of transient extracellular signals through modulation of de novo synthesis of particular functional proteins in the brain. In eukaryotes, protein de novo synthesis is mainly under the control at the level of gene transcription by transcription factors in the cell nucleus. Transcription factors are nuclear proteins with an ability to recognize particular core nucleotides at the upstream and/or downstream of target genes, and thereby to modulate the activity of RNA polymerase II that is responsible for the formation of mRNA from double stranded DNA. Gel retardation electrophoresis is widely employed for conventional detection of DNA binding activities of a variety of transcription factors with different protein motifs. Extracellular ionotropic glutamate (Glu) signals lead to rapid and selective potentiation of DNA binding of the nuclear transcription factor activator protein-1 (AP1) that is a homo- and heterodimeric complex between Jun and Fos family members, in addition to inducing expression of the corresponding proteins, in a manner unique to each Glu signal in murine hippocampus. Therefore, extracellular Glu signals may be differentially transduced into the nucleus to express AP1 with different assemblies between Jun and Fos family members, and thereby to modulate de novo synthesis of the individual target proteins at the level of gene transcription in the hippocampus. Such mechanisms may be operative on synaptic plasticity as well as delayed neuronal death through consolidation of alterations of a variety of cellular functions induced by transient extracellular signals in the brain.
Collapse
Affiliation(s)
- Y Yoneda
- Department of Molecular Pharmacology, Kanazawa University Faculty of Pharmaceutical Sciences, 13-1 Takara-machi, Kanazawa, 920-0934, Ishikawa, Japan.
| | | | | | | |
Collapse
|
40
|
Abstract
A high-resolution analysis of polyprenol mixtures was achieved by supercritical fluid chromatography (SFC). The separation of polyprenols was examined on an octadecylsilane-packed column with liquid carbon dioxide as the mobile phase and ethanol as modifier. Using this chromatography system, the resolution of separation (Rs) between octadecaprenol (prenol 18) and nonadecaprenol (prenol 19) was two times higher than that using conventional reversed-phase high-performance liquid chromatography. Our SFC technique allows the advantage of baseline separation of polyprenol samples containing hydrophobic components such as terpenes or fatty acids that are unfavorable for good separation. This method is very useful for the analysis of structurally close polyprenol analogues of rubber plant metabolites.
Collapse
Affiliation(s)
- T Bamba
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Japan
| | | | | | | | | | | |
Collapse
|
41
|
Ogita K, Kitayama T, Okuda H, Yoneda Y. Effects of glutathione depletion by 2-cyclohexen-1-one on excitatory amino acids-induced enhancement of activator protein-1 DNA binding in murine hippocampus. J Neurochem 2001; 76:1905-15. [PMID: 11259509 DOI: 10.1046/j.1471-4159.2001.00212.x] [Citation(s) in RCA: 9] [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: 11/20/2022]
Abstract
We have investigated the role of glutathione in mechanisms associated with excitatory amino acid signaling to the nuclear transcription factor activator protein-1 (AP1) in the brain using mice depleted of endogenous glutathione by prior treatment with 2-cyclohexen-1-one (CHX). In the hippocampus of animals treated with CHX 2 h before, a significant increase was seen in enhancement of AP1 DNA binding when determined 2 h after the injection of kainic acid (KA) at low doses. The sensitization to KA was not seen in animals injected with CHX 24 h before, in coincidence with the recovery of glutathione contents to the normal levels. By contrast, CHX did not significantly affect the potentiation by NMDA of AP1 binding under any experimental conditions. Prior treatment with CHX resulted in facilitation of behavioral changes induced by KA without affecting those induced by NMDA. These results suggest that endogenous glutathione may be at least in part involved in molecular mechanisms underlying transcriptional control by KA, but not by NMDA, signals of cellular functions.
Collapse
Affiliation(s)
- K Ogita
- Department of Pharmacology, Setsunan University, Hirakata, Osaka, Japan.
| | | | | | | |
Collapse
|
42
|
Manabe T, Kitayama T, Ogita K, Yoneda Y. Differential expression and phosphorylation of particular fos family members by kainate in nuclear and cytosolic fractions of murine hippocampus. Neuroscience 2001; 100:453-63. [PMID: 11098108 DOI: 10.1016/s0306-4522(00)00284-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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: 11/17/2022]
Abstract
An i.p. injection of kainate resulted in severe losses of neuronal cells stained by Cresyl Violet in the CA1 and CA3 pyramidal layers of the murine hippocampus within two weeks, without affecting those in the dentate granule layer up to six weeks. Immunohistochemical analysis revealed marked and predominant expression of Fos family members, including c-Fos, Fos-B and Fra-2 proteins, in the dentate granule layer of the hippocampus, but not in the pyramidal layers, 2-18h after administration. Immunoblotting experiments showed that kainate induced more potent expression of c-Fos protein in nuclear fractions obtained 2h after injection than those obtained 18h later, with similar expression between cytosolic fractions obtained 2 and 18h after administration. Both Fos-B and Fra-2 proteins were more potently expressed in nuclear and cytosolic fractions 18h after administration than 2h when determined on immunoblotting analysis. Two-dimensional electrophoresis revealed expression of several proteins immunoreactive to the anti-c-Fos antibody with different isoelectric points in response to kainate in nuclear and cytosolic fractions of the hippocampus for 2-18h after a single injection. Immunoprecipitation analysis using the anti-c-Fos antibody showed phosphorylation of c-Fos protein on serine residues in hippocampal nuclear fractions 2h after administration, with additional phosphorylation on tyrosine residues 18h later. Prior treatment of the protein synthesis inhibitor cycloheximide prevented the expression of immunoreactivities to the anti-c-Fos antibody detected on two-dimensional electrophoresis in hippocampal nuclear fractions obtained 2h after administration.These results suggest that in vivo kainate signals may lead to persistent expression of the transcription factor activator protein-1 that consists of different Fos family members, as well as of c-Fos protein phosphorylated on serine and/or tyrosine residues, at an early stage after administration. Such signal consolidation processes could play a role in mechanisms associated with neuronal survival after kainate in the dentate granular layer of murine hippocampus.
Collapse
Affiliation(s)
- T Manabe
- Department of Pharmacology, Setsunan University, Hirakata, 573-0101, Osaka, Japan
| | | | | | | |
Collapse
|
43
|
|
44
|
Kitayama T, Morimoto M, Takatani M, Tamura Y, Takumi M, Okamoto T. Isolation of hemicellulose from a sorghum, Andropogon sorghum Brot, Kumadake no. 263, and determination of its constituent sugars. Carbohydr Res 2000; 325:230-2. [PMID: 10795815 DOI: 10.1016/s0008-6215(00)00002-1] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Hemicellulose was isolated from the stem of sorghum, Andropogon sorghum Brot, Kumadake no. 263, and the constituent sugars of this isolate were determined. The xylose concentration in the hemicellulose of SV263 was extremely high.
Collapse
Affiliation(s)
- T Kitayama
- Department of Agricultural Chemistry, Faculty of Agriculture, Kinki University, Nara, Japan.
| | | | | | | | | | | |
Collapse
|
45
|
Yamamoto K, Kitayama T, Ishida N, Watanabe T, Tanabe H, Takatani M, Okamoto T, Utsumi R. Identification and characterization of a potent antibacterial agent, NH125 against drug-resistant bacteria. Biosci Biotechnol Biochem 2000; 64:919-23. [PMID: 10830522 DOI: 10.1271/bbb.64.919] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [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
New imidazole compounds were synthesized to develop a novel and effective antibacterial agent (1-benzyl-3-cetyl-2-methylimidazolium iodide, NH125). In vitro experiments demonstrated that NH125 effectively inhibited a number of different histidine protein kinases. Furthermore, oxacillin-resistant Staphylococcus aureus (ORSA), vancomycin-resistant Enterococcus faecalis (VRE), penicillin-resistant Streptococcus pneumoniae (PRS), and other Gram-positive and Gram-negative bacteria were found to be very sensitive to NH125.
Collapse
Affiliation(s)
- K Yamamoto
- Department of Agricultural Chemistry, Kinki University, Nara, Japan
| | | | | | | | | | | | | | | |
Collapse
|
46
|
Kitayama T, Ogita K, Yoneda Y. Sustained potentiation of AP1 DNA binding is not always associated with neuronal death following systemic administration of kainic acid in murine hippocampus. Neurochem Int 1999; 35:453-62. [PMID: 10524713 DOI: 10.1016/s0197-0186(99)00088-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [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: 11/20/2022]
Abstract
Mice were intraperitoneally injected with kainic acid (KA), followed by dissection of frozen coronal sections and subsequent punching out of the pyramidal and granular cell layers in the hippocampus under a binocular microscope. Systemic administration of KA resulted in marked and sustained potentiation of binding of a radiolabeled double stranded oligonucleotide probe for the nuclear transcription factor activator protein-1 (AP1) in the pyramidal cell layers of the CA1 and CA3 subfields and the granule cell layers of the dentate gyrus 2-18 h later. Morphological evaluation using cresyl violet revealed marked losses of neuronal layers in the pyramidal CA1 and CA3 subfields, but not in the granular dentate gyrus, within 6 weeks after administration. Supershift analysis using antibodies against different Jun and Fos family members differentiated between AP1 DNA binding in hippocampal nuclear extracts obtained 2 and 18 h after the administration of KA. These results suggest that neuronal death may not always follow modulation of de novo synthesis of particular proteins through sustained potentiation of AP1 DNA binding which involves expression of different Jun and Fos family members in response to systemic administration of KA in murine hippocampus.
Collapse
Affiliation(s)
- T Kitayama
- Department of Pharmacology, Setsunan University, Hirakata, Osaka, Japan
| | | | | |
Collapse
|
47
|
Komatsu E, Kitayama T. Sunyaev-Zeldovich Fluctuations from Spatial Correlations between Clusters of Galaxies. Astrophys J 1999; 526:L1-L4. [PMID: 10534447 DOI: 10.1086/312364] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We present angular power spectra of the cosmic microwave background radiation anisotropy due to fluctuations of the Sunyaev-Zeldovich (SZ) effect through clusters of galaxies. A contribution from the correlation among clusters, which has been neglected in previous analyses, is especially focused on. Employing the evolving linear bias factor based on the Press-Schechter formalism, we find that the clustering contribution amounts to 20%-30% of the Poissonian contribution at degree angular scales. If we exclude clusters in the local universe, it even exceeds the Poissonian noise and makes the dominant contribution to the angular power spectrum. As a concrete example, we demonstrate the subtraction of the ROSAT X-ray and Planck SZ flux-limited cluster samples. It indicates that we should include the clustering effect in the analysis of the SZ fluctuations. We further find that the degree scale spectra essentially depend upon the normalization of the density fluctuations, i.e., sigma8, and the gas mass fraction of the cluster, rather than the density parameter of the universe and details of cluster evolution models. Our results show that the SZ fluctuations at the degree scale will provide a possible measure of sigma8, while the arcminute spectra will provide a probe of the cluster evolution. In addition, the clustering spectrum will give us valuable information on the bias at high redshift, if we can detect it by removing X-ray or SZ luminous clusters.
Collapse
|
48
|
Yoneda Y, Ogita K, Azuma Y, Kuramoto N, Manabe T, Kitayama T. Predominant expression of nuclear activator protein-1 complex with DNA binding activity following systemic administration of N-methyl-D-aspartate in dentate granule cells of murine hippocampus. Neuroscience 1999; 93:19-31. [PMID: 10430467 DOI: 10.1016/s0306-4522(99)00117-7] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [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: 11/19/2022]
Abstract
The systemic administration of N-methyl-D-aspartate (100 mg/kg, i.p.) resulted in preferential but transient expression of the transcription factor activator protein-1 in the granule cell layers of the dentate gyrus in the murine hippocampus by maximally 700% 1 h later, without markedly affecting that in the pyramidal cell layers of the CA1 and CA3 subfields for 4 h. The potentiation was completely prevented by prior administration of the N-methyl-D-aspartate channel blocker dizocilpine at 10 mglkg. By contrast, kainate (40 mg/kg, i.p.) potentiated activator protein-1 DNA binding in adjacent areas around the pyramidal and granule cell layers, in addition to potentiating that in neuronal cell layers of the CA1 and CA3 subfields and the dentate gyrus. Light microscopic analysis revealed that kainate, but not N-methyl-D-aspartate, induced marked losses of the pyramidal cells in the CAI and CA3 subfields, without affecting the dentate granule cells, for 14 days after administration. Limited proteolysis by V8 protease and supershift, as well as immunoblotting assays using antibodies against c-Fos and c-Jun, invariably gave support for differential expression by N-methyl-D-aspartate and kainate of the activator protein-1 complex consisting of different partner proteins. Moreover, two-dimensional electrophoresis followed by immunoblotting analysis revealed the expression of several nuclear proteins immunoreactive with the anti-c-Fos antibody at molecular weights and isoelectric points clearly different from those of c-Fos itself in response to kainate, but not N-methyl-D-aspartate, in the hippocampus. These results suggest that in vivo N-methyl-D-aspartate signals are predominantly transduced into cell nuclei to express activator protein-1 complex through molecular mechanisms different from those for kainate signals in the granule cells of the dentate gyrus in the murine hippocampus.
Collapse
Affiliation(s)
- Y Yoneda
- Department of Pharmacology, Setsunan University, Hirakata, Osaka, Japan
| | | | | | | | | | | |
Collapse
|
49
|
Kitayama T, Ogita K, Nomoto M, Yoneda Y. Sensitization by prolonged glutathione depletion of kainic acid to potentiate DNA binding of the nuclear transcription factor activator protein-1 in murine hippocampus. Neurosci Lett 1999; 269:157-60. [PMID: 10454156 DOI: 10.1016/s0304-3940(99)00445-0] [Citation(s) in RCA: 9] [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: 10/18/2022]
Abstract
In four of four mice intracerebroventricularly injected with the inhibitor of glutathione synthesis L-buthionine-[S,R]-sulfoximine (BSO) 2 days before, an intraperitoneal injection of kainic acid (KA) invariably led to marked potentiation of DNA binding activity of the nuclear transcription factor activator protein-I (AP1) in the hippocampus at a dose which was ineffective in animals previously injected with vehicle alone. However, KA failed to potentiate binding in animals injected with BSO 1 day before. The intracerebroventricular injection of BSO induced marked and prolonged depletion of a total glutathione content in murine hippocampus for 1-2 days after administration. These results suggest that prolonged depletion of endogenous glutathione for a period longer than 1 day may lead to sensitization of KA signals to potentiate AP1 DNA binding in cell nuclei and thereby modulate de novo synthesis of particular proteins at the level of gene transcription in murine hippocampus.
Collapse
Affiliation(s)
- T Kitayama
- Department of Pharmacology, Setsunan University, Hirakata, Osaka, Japan
| | | | | | | |
Collapse
|
50
|
Ogita K, Shuto M, Kuramoto N, Manabe T, Hinoi E, Kitayama T, Sakata K, Yoneda Y. Differential inhibition by ferrous ions of [3H]MK-801 binding to native N-methyl-D-aspartate channel in neonatal and adult rat brains. Brain Res 1999; 818:548-52. [PMID: 10082845 DOI: 10.1016/s0006-8993(98)01300-6] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
In vitro addition or pretreatment with >/=1 microM ferrous chloride markedly inhibited in a concentration-dependent manner [3H]dizocilpine (MK-801) binding to an open ion channel associated with the N-methyl-D-aspartate (NMDA) receptor in rat brain synaptic membranes. The addition of NMDA agonists invariably attenuated the inhibition of [3H]MK-801 binding in hippocampal synaptic membranes previously treated with ferrous chloride, without significantly affecting that in cerebellar synaptic membranes. In the absence of spermidine, ferrous chloride was more potent in inhibiting binding in the cerebral cortex and hippocampus in adult rats than in those in rats at 3 days after birth, while in the striatum [3H]MK-801 binding was 10 times more sensitive to inhibition by added ferrous chloride in neonatal rats than in adult rats. Addition of spermidine significantly attenuated the potency of ferrous chloride to inhibit binding in the cerebral cortex of adult rats, with facilitation of the inhibition in newborn rats. Moreover, spermidine significantly reduced the inhibitory potency of ferrous chloride in neonatal rat striatum, without markedly affecting that in adult rat striatum. These results suggest that ferrous ions may interfere with opening processes of the native NMDA channel through molecular mechanisms peculiar to neuronal development in a manner associated with the polyamine recognition domain.
Collapse
Affiliation(s)
- K Ogita
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka 573-0101, Japan
| | | | | | | | | | | | | | | |
Collapse
|