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Iwabuchi K, Shimada TL, Yamada T, Hara-Nishimura I. A space-saving visual screening method, Glycine max FAST, for generating transgenic soybean. Plant Signal Behav 2020; 15:1722911. [PMID: 32019401 PMCID: PMC7053950 DOI: 10.1080/15592324.2020.1722911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 01/23/2020] [Accepted: 01/23/2020] [Indexed: 05/27/2023]
Abstract
Establishing homozygous transgenic lines of Glycine max is time-consuming and laborious. To overcome the difficulties, we developed a powerful method for selecting transgenic soybean plants, Fluorescence-Accumulating Seed Technology (GmFAST). GmFAST uses a marker composed of a soybean seed-specific promoter coupled to the OLE1-GFP gene, which encodes a GFP fusion of the oil-body membrane protein OLEOSIN1 of Arabidopsis thaliana. We introduced the marker gene into cotyledonary nodes of G. max Kariyutaka via Agrobacterium-mediated transformation and regenerated heterozygous transgenic plants. OLE1-GFP-expressing soybean seeds can be selected nondestructively with a fluorescence stereomicroscope. Among T2 seeds, the most strongly fluorescent seeds were homozygous. GmFAST enables to reduce the growing space by one-tenth compared with the conventional method. With this method, we obtained the soybean line that had higher levels of seed pods and oil production. The phenotypes are presumably caused by overexpression of Glyma13g30950, suggesting that Glyma13g30950 regulates seed pod formation in soybean plants. An increase in seed pod number was confirmed in A. thaliana plants that overexpressed the Arabidopsis ortholog of Glyma13g30950, E6L1.Taken together, GmFAST provides a space-saving visual and nondestructive screening method for soybean transformation, thereby increasing the chance of developing useful soybean lines.
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Affiliation(s)
- Kosei Iwabuchi
- Graduate School of Science, Kyoto University, Kyoto, Japan
- Faculty of Science and Engineering, Konan University, Kobe, Japan
| | | | - Tetsuya Yamada
- Graduate School of Agriculture, Hokkaido University, Sapporo, Japan
| | - Ikuko Hara-Nishimura
- Graduate School of Science, Kyoto University, Kyoto, Japan
- Faculty of Science and Engineering, Konan University, Kobe, Japan
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Nakai Y, Horiguchi G, Iwabuchi K, Harada A, Nakai M, Hara-Nishimura I, Yano T. tRNA Wobble Modification Affects Leaf Cell Development in Arabidopsis thaliana. Plant Cell Physiol 2019; 60:2026-2039. [PMID: 31076779 DOI: 10.1093/pcp/pcz064] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 04/04/2019] [Indexed: 05/14/2023]
Abstract
The tRNA modification at the wobble position of Lys, Glu and Gln (wobbleU* modification) is responsible for the fine-tuning of protein translation efficiency and translation rate. This modification influences organism function in accordance with growth and environmental changes. However, the effects of wobbleU* modification at the cellular, tissue, or individual level have not yet been elucidated. In this study, we show that sulfur modification of wobbleU* of the tRNAs affects leaf development in Arabidopsis thaliana. The sulfur modification was impaired in the two wobbleU*-modification mutants: the URM1-like protein-defective mutant and the Elongator complex-defective mutants. Analyses of the mutant phenotypes revealed that the deficiency in the wobbleU* modification increased the airspaces in the leaves and the leaf size without affecting the number and the area of palisade mesophyll cells. On the other hand, both mutants exhibited increased number of leaf epidermal pavement cells but with reduced cell size. The deficiency in the wobbleU* modification also delayed the initiation of the endoreduplication processes of mesophyll cells. The phenotype of ASYMMETRIC LEAVES2-defective mutant was enhanced in the Elongator-defective mutants, while it was unchanged in the URM1-like protein-defective mutant. Collectively, the findings of this study suggest that the tRNA wobbleU* modification plays an important role in leaf morphogenesis by balancing the development between epidermal and mesophyll tissues.
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Affiliation(s)
- Yumi Nakai
- Department of Biochemistry, Osaka Medical College, 2-7 Daigakumachi, Takatsuki, Japan
| | - Gorou Horiguchi
- Department of Life Science, College of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo, Japan
| | - Kosei Iwabuchi
- Faculty of Science and Engineering, Konan University, Kobe, Japan
| | - Akiko Harada
- Department of Biology, Osaka Medical College, 2-7 Daigakumachi, Takatsuki, Japan
| | - Masato Nakai
- Institute for Protein Research, Osaka University, 3-2 Yamada-oka, Suita, Japan
| | | | - Takato Yano
- Department of Biochemistry, Osaka Medical College, 2-7 Daigakumachi, Takatsuki, Japan
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Kondou Y, Miyagi Y, Morito T, Fujihira K, Miyauchi W, Moriyama A, Terasawa T, Ishida S, Iwabuchi K, Kubo H, Nishihama R, Ishizaki K, Kohchi T. Physiological function of photoreceptor UVR8 in UV-B tolerance in the liverwort Marchantia polymorpha. Planta 2019; 249:1349-1364. [PMID: 30840176 DOI: 10.1007/s00425-019-03090-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 01/04/2019] [Indexed: 05/08/2023]
Abstract
The physiological importance of MpUVR8 in UV-B resistance and translocation in a UV-B-dependent manner from the cytosol into the nucleus is characterized in Marchantia polymorpha. UV RESISTANCE LOCUS 8 (UVR8) is an ultraviolet-B (UV-B) light receptor functioning for UV-B sensing and tolerance in Arabidopsis thaliana and other species. It is unclear whether UVR8 physiologically functions in UV-B-induced defense responses in Marchantia polymorpha, which belongs to the earliest diverging group of embryophyte lineages. Here, we demonstrate that UVR8 has a physiological function in UV-B tolerance and that there is a UVR8-dependent pathway involved. In addition, a UVR8-independent pathway is revealed. We examine the tissue-specific expression pattern of M. polymorpha UVR8 (MpUVR8), showing that it is highly expressed in the apical notch in thalli and gametangiophores, as well as in antheridial and archegonial heads. Furthermore, Mpuvr8KO plant transformants, in which the MpUVR8 locus was disrupted, were produced and analyzed to understand the physiological and molecular function of MpUVR8. Analysis using these plants indicates the important roles of MpUVR8 and MpUVR8-regulated genes, and of MpUVR8-independent pathways in UV-B tolerance. Subcellular localization of Citrine-fused MpUVR8 in M. polymorpha cells was also investigated. It was found to translocate from the cytosol into the nucleus in response to UV-B irradiation. Our findings indicate strong conservation of the physiological function of UVR8 and the molecular mechanisms for UVR8-dependent signal transduction through regulation of gene expression in embryophytes.
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Affiliation(s)
- Youichi Kondou
- Department of Biosciences, Kanto Gakuin University College of Science and Engineering, Yokohama, 236-8501, Japan.
| | - Yuta Miyagi
- Department of Biosciences, Kanto Gakuin University College of Science and Engineering, Yokohama, 236-8501, Japan
| | - Takeshi Morito
- Department of Biosciences, Kanto Gakuin University College of Science and Engineering, Yokohama, 236-8501, Japan
| | - Kenta Fujihira
- Department of Biosciences, Kanto Gakuin University College of Science and Engineering, Yokohama, 236-8501, Japan
| | - Wataru Miyauchi
- Department of Biosciences, Kanto Gakuin University College of Science and Engineering, Yokohama, 236-8501, Japan
| | - Asami Moriyama
- Department of Biosciences, Kanto Gakuin University College of Science and Engineering, Yokohama, 236-8501, Japan
| | - Takuya Terasawa
- Department of Biosciences, Kanto Gakuin University College of Science and Engineering, Yokohama, 236-8501, Japan
| | - Sakiko Ishida
- Graduate School of Biostudies, Kyoto University, Kyoto, 606-8502, Japan
| | - Kosei Iwabuchi
- Faculty of Science and Engineering, Konan University, Kobe, 658-8501, Japan
| | - Hiroyoshi Kubo
- Department of Biology, Faculty of Science, Shinshu University, Matsumoto, 390-8621, Japan
| | - Ryuichi Nishihama
- Graduate School of Biostudies, Kyoto University, Kyoto, 606-8502, Japan
| | | | - Takayuki Kohchi
- Graduate School of Biostudies, Kyoto University, Kyoto, 606-8502, Japan
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Iwabuchi K, Ohnishi H, Tamura K, Fukao Y, Furuya T, Hattori K, Tsukaya H, Hara-Nishimura I. ANGUSTIFOLIA Regulates Actin Filament Alignment for Nuclear Positioning in Leaves. Plant Physiol 2019; 179:233-247. [PMID: 30404821 PMCID: PMC6324246 DOI: 10.1104/pp.18.01150] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 10/24/2018] [Indexed: 05/03/2023]
Abstract
During dark adaptation, plant nuclei move centripetally toward the midplane of the leaf blade; thus, the nuclei on both the adaxial and abaxial sides become positioned at the inner periclinal walls of cells. This centripetal nuclear positioning implies that a characteristic cell polarity exists within a leaf, but little is known about the mechanism underlying this process. Here, we show that ANGUSTIFOLIA (AN) and ACTIN7 regulate centripetal nuclear positioning in Arabidopsis (Arabidopsis thaliana) leaves. Two mutants defective in the positioning of nuclei in the dark were isolated and designated as unusual nuclear positioning1 (unp1) and unp2 In the dark, nuclei of unp1 were positioned at the anticlinal walls of adaxial and abaxial mesophyll cells and abaxial pavement cells, whereas the nuclei of unp2 were positioned at the anticlinal walls of mesophyll and pavement cells on both the adaxial and abaxial sides. unp1 was caused by a dominant-negative mutation in ACTIN7, and unp2 resulted from a recessive mutation in AN Actin filaments in unp1 were fragmented and reduced in number, which led to pleiotropic defects in nuclear morphology, cytoplasmic streaming, and plant growth. The mutation in AN caused aberrant positioning of nuclei-associated actin filaments at the anticlinal walls. AN was detected in the cytosol, where it interacted physically with plant-specific dual-specificity tyrosine phosphorylation-regulated kinases (DYRKPs) and itself. The DYRK inhibitor (1Z)-1-(3-ethyl-5-hydroxy-2(3H)-benzothiazolylidene)-2-propanone significantly inhibited dark-induced nuclear positioning. Collectively, these results suggest that the AN-DYRKP complex regulates the alignment of actin filaments during centripetal nuclear positioning in leaf cells.
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Affiliation(s)
- Kosei Iwabuchi
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
- Faculty of Science and Engineering, Konan University, Kobe 658-8501, Japan
| | - Haruna Ohnishi
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Kentaro Tamura
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
- School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
| | - Yoichiro Fukao
- College of Life Sciences, Ritsumeikan University, Shiga 525-8577, Japan
| | - Tomoyuki Furuya
- Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan
| | - Koro Hattori
- Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan
| | - Hirokazu Tsukaya
- Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan
- Okazaki Institute for Integrative Bioscience, Okazaki 444-8787, Japan
| | - Ikuko Hara-Nishimura
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
- Faculty of Science and Engineering, Konan University, Kobe 658-8501, Japan
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Takano S, Uchida K, Inoue G, Miyagi M, Aikawa J, Iwase D, Iwabuchi K, Matsumoto T, Satoh M, Mukai M, Minatani A, Takaso M. Nerve growth factor regulation and production by macrophages in osteoarthritic synovium. Clin Exp Immunol 2017; 190:235-243. [PMID: 28677145 DOI: 10.1111/cei.13007] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2017] [Indexed: 12/27/2022] Open
Abstract
Nerve growth factor (NGF) functions to modulate osteoarthritis (OA)-associated pain. Although recent studies suggest that tumour necrosis factor (TNF)-α and interleukin (IL)-1β mediate NGF activity in human synovial fibroblasts, the regulation of NGF expression in human synovial macrophages remains unclear. Here, we examined the role of macrophages in the production and regulation of synovial (SYN) NGF in osteoarthritic knee joints by examining the mRNA expression of TNF-α and IL-1β in freshly isolated CD14-positive (macrophage-rich fraction) and CD14-negative cells (fibroblast-rich fraction) in synovial tissue from OA patients by quantitative polymerase chain reaction. We also examined the effects of IL-1β and TNF-α on NGF mRNA expression in cultured CD14-positive (macrophage-rich fraction) and CD14-negative cells (fibroblast-rich fraction). In addition, to examine the contribution of macrophages to NGF, TNF-α and IL-1β expression, we injected clodronate liposomes systemically into STR/Ort mice, an osteoarthritis animal model, to deplete macrophages. TNF-α and IL-1β mRNA levels in CD14-positive cells from the SYN of OA patients was significantly higher than that in CD14-negative cells, while NGF expression did not differ markedly between the two cell fractions. In addition, treatment of human cultured CD14-positive and -negative cells with IL-1β and TNF-α enhanced NGF mRNA and protein levels. Expression of NGF, IL-1β and TNF-α was also reduced significantly in STR/Ort mice upon macrophage depletion. These findings suggest that IL-1β and TNF-α regulate NGF expression and production in synovial macrophages and fibroblasts in osteoarthritic joints.
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Affiliation(s)
- S Takano
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - K Uchida
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - G Inoue
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - M Miyagi
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - J Aikawa
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - D Iwase
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - K Iwabuchi
- Department of Immunology, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - T Matsumoto
- Department of Pathology, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - M Satoh
- Department of Immunology, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - M Mukai
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - A Minatani
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - M Takaso
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
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Iwabuchi K, Hidema J, Tamura K, Takagi S, Hara-Nishimura I. Plant Nuclei Move to Escape Ultraviolet-Induced DNA Damage and Cell Death. Plant Physiol 2016; 170:678-85. [PMID: 26681797 PMCID: PMC4734561 DOI: 10.1104/pp.15.01400] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 12/12/2015] [Indexed: 05/19/2023]
Abstract
A striking feature of plant nuclei is their light-dependent movement. In Arabidopsis (Arabidopsis thaliana) leaf mesophyll cells, the nuclei move to the side walls of cells within 1 to 3 h after blue-light reception, although the reason is unknown. Here, we show that the nuclear movement is a rapid and effective strategy to avoid ultraviolet B (UVB)-induced damages. Mesophyll nuclei were positioned on the cell bottom in the dark, but sudden exposure of these cells to UVB caused severe DNA damage and cell death. The damage was remarkably reduced in both blue-light-treated leaves and mutant leaves defective in the actin cytoskeleton. Intriguingly, in plants grown under high-light conditions, the mesophyll nuclei remained on the side walls even in the dark. These results suggest that plants have two strategies for reducing UVB exposure: rapid nuclear movement against acute exposure and nuclear anchoring against chronic exposure.
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Affiliation(s)
- Kosei Iwabuchi
- Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan (K.I., K.T., I.H.-N.);Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan (J.H.); andGraduate School of Science, Osaka University, Machikaneyama-cho 1-1, Toyonaka, Osaka 560-0043, Japan (S.T.)
| | - Jun Hidema
- Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan (K.I., K.T., I.H.-N.);Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan (J.H.); andGraduate School of Science, Osaka University, Machikaneyama-cho 1-1, Toyonaka, Osaka 560-0043, Japan (S.T.)
| | - Kentaro Tamura
- Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan (K.I., K.T., I.H.-N.);Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan (J.H.); andGraduate School of Science, Osaka University, Machikaneyama-cho 1-1, Toyonaka, Osaka 560-0043, Japan (S.T.)
| | - Shingo Takagi
- Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan (K.I., K.T., I.H.-N.);Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan (J.H.); andGraduate School of Science, Osaka University, Machikaneyama-cho 1-1, Toyonaka, Osaka 560-0043, Japan (S.T.)
| | - Ikuko Hara-Nishimura
- Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan (K.I., K.T., I.H.-N.);Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan (J.H.); andGraduate School of Science, Osaka University, Machikaneyama-cho 1-1, Toyonaka, Osaka 560-0043, Japan (S.T.)
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Takano S, Uchida K, Miyagi M, Inoue G, Aikawa J, Fujimaki H, Minatani A, Sato M, Iwabuchi K, Takaso M. Synovial macrophage-derived IL-1β regulates the calcitonin receptor in osteoarthritic mice. Clin Exp Immunol 2015; 183:143-9. [PMID: 26400621 DOI: 10.1111/cei.12712] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2015] [Indexed: 12/26/2022] Open
Abstract
Recent studies have reported that calcitonin gene-related peptide (CGRP) contributes to joint pain. However, regulation of the CGRP/CGRP receptor signalling in osteoarthritis (OA) is not fully understood. To investigate the regulation of CGRP/CGRP receptor signalling by macrophages in the synovial tissue (ST) of OA joints, we characterized the gene expression profiles of CGRP and CGRP receptors in the ST of OA mice (STR/Ort). In addition, we examined whether macrophage depletion by the systemic injection of clodronate-laden liposomes affected the expression of CGRP and CGRP receptors in ST. CD11c(+) macrophages in the ST of STR/Ort and C57BL/6J mice were analysed by flow cytometry. Real-time polymerase chain reaction (PCR) was used to evaluate the expression of interleukin (IL)-1β, CGRP, calcitonin receptor-like receptor (CLR) and receptor activity-modifying protein 1 (RAMP1) in F4/80(+) and F4/80(-) cells. The effects of IL-1β on the expression of CGRP and CLR by cultured synovial cells were also examined. The percentage of CD11c(+) macrophages in the ST of STR/Ort was higher than that in C57/BL6J mice. Notably, the F4/80(+) cell fraction expressed IL-1β highly, whereas the F4/80(-) cell fraction expressed CGRP, CLR, and RAMP1 highly. In addition, expression of the IL-1β and CLR genes was increased in ST, but was decreased upon macrophage depletion, and the IL-1β treatment of cultured synovial cells up-regulated CLR. Taken together, the present findings suggest that synovial macrophages are the major producers of IL-1β and regulators of CLR in OA mice. Therefore, macrophages and IL-1β may be suitable therapeutic targets for treating OA pain.
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Affiliation(s)
- S Takano
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - K Uchida
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - M Miyagi
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - G Inoue
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - J Aikawa
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - H Fujimaki
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - A Minatani
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - M Sato
- Department of Immunology, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - K Iwabuchi
- Department of Immunology, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - M Takaso
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
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Uchida K, Satoh M, Inoue G, Onuma K, Miyagi M, Iwabuchi K, Takaso M. CD11c(+) macrophages and levels of TNF-α and MMP-3 are increased in synovial and adipose tissues of osteoarthritic mice with hyperlipidaemia. Clin Exp Immunol 2015; 180:551-9. [PMID: 25693634 DOI: 10.1111/cei.12607] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/12/2015] [Indexed: 12/17/2022] Open
Abstract
To understand more clearly the link between osteoarthritis and hyperlipidaemia, we investigated the inflammatory macrophage subsets and macrophage-regulated matrix metalloprotease-3 (MMP-3) and A disintegrin and metalloprotease with thrombospondin motifs-4 (ADAMTS4) in synovial (ST) and adipose tissues (AT) of osteoarthritic mice with hyperlipidaemia (STR/Ort). CD11c(+) F4/80(+) CD11b(+) macrophage populations in the ST and AT of 9-month-old STR/Ort and C57BL/6J mice were characterized and compared by flow cytometry and real-time polymerase chain reaction (PCR) analyses. Expression of tumour necrosis factor (TNF)-α, MMP-3 and ADAMTS4, and the response of these factors to anionic liposomal clodronate induced-macrophage depletion were also evaluated by real-time PCR. Expression of TNF-α in CD11c(+) cells, which were isolated by magnetic beads, was compared to CD11c(-) cells. In addition, the effect of TNF-α on cultured synovial fibroblasts and adipocytes was investigated. CD11c(+) F4/80(+) CD11b(+) macrophages were increased in ST and AT of STR/Ort mice. The CD11c(+) cell fraction highly expressed TNF-α. Expression of TNF-α and MMP3 was increased in ST and AT, and was decreased upon macrophage depletion. TNF-α treatment of cultured synovial fibroblasts and adipocytes markedly up-regulated MMP-3. CD11c(+) F4/80(+) CD11b(+) macrophages were identified as a common inflammatory subset in the AT and ST of STR/Ort mice with hyperlipidaemia. The induction of inflammation in AT and ST may be part of a common mechanism that regulates MMP3 expression through TNF-α. Our findings suggest that increased numbers of CD11c(+) macrophages and elevated levels of TNF-α and MMP-3 in AT and ST may explain the relationship between hyperlipidaemia and OA.
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Affiliation(s)
- K Uchida
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - M Satoh
- Department of Immunology, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - G Inoue
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - K Onuma
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - M Miyagi
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - K Iwabuchi
- Department of Immunology, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
| | - M Takaso
- Department of Orthopedic Surgery, Kitasato University School of Medicine, Sagamihara City, Kanagawa, Japan
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Shima S, Kawamura N, Ishikawa T, Masuda H, Iwahara C, Niimi Y, Ueda A, Iwabuchi K, Mutoh T. Anti-neutral glycolipid antibodies in encephalomyeloradiculoneuropathy. Neurology 2013; 82:114-8. [DOI: 10.1212/wnl.0000000000000015] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Watanabe K, Iwahara C, Nakayama H, Iwabuchi K, Matsukawa T, Yokoyama K, Yamaguchi K, Kamiyama Y, Inada E. Sevoflurane suppresses tumour necrosis factor-α-induced inflammatory responses in small airway epithelial cells after anoxia/reoxygenation. Br J Anaesth 2013; 110:637-45. [PMID: 23295714 DOI: 10.1093/bja/aes469] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Lung ischaemia-reperfusion (I/R) injury is correlated with poor clinical outcome. The inflammatory cytokines interleukin (IL)-6, IL-8, and monocyte chemotactic protein-1 (MCP-1) are produced by pulmonary epithelial cells during lung transplantation and are considered to be involved in I/R injury. The volatile anaesthetic sevoflurane has been shown to exert a protective effect on I/R injury in various organs. We investigated the effect of sevoflurane on the inflammatory functions of pulmonary epithelial cells in vitro. METHODS Human normal small airway epithelial cells (SAEC) were incubated under anoxic conditions for 24 h with or without sevoflurane and then stimulated with tumour necrosis factor (TNF)-α under hyperoxic conditions for 5 h with or without sevoflurane. After incubation, IL-6, IL-8, and MCP-1 mRNA expression was analysed by quantitative real-time RT-PCR. The production of IL-6, IL-8, and MCP-1 was assayed by enzyme-linked immunosorbent assay, the effects of sevoflurane on inflammatory gene expression were examined by DNA microarray analysis, and the effects of sevoflurane on NF-κB-mediated inflammatory cytokine production were examined by immunoblotting. RESULTS Sevoflurane suppressed TNF-α-induced IL-6, IL-8, and MCP-1 gene expression and the production of IL-6 and IL-8 in SAEC under anoxia/reoxygenation conditions. DNA microarray analysis indicated that sevoflurane modulated NF-κB-related gene expression. Sevoflurane significantly inhibited TNF-α-induced translocation of p65 NF-κB into the nucleus. Sevoflurane enhanced TNF-α-induced gene expression of inhibitor κB (IκB) but not of NF-κB. CONCLUSIONS Sevoflurane suppressed the NF-κB-mediated production of pulmonary epithelial cell-derived inflammatory cytokines, including IL-6 and IL-8, which are capable of causing I/R injury.
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Affiliation(s)
- K Watanabe
- Department of Anesthesiology and Pain Medicine, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Tokyo 113-8421, Japan
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Iwabuchi K, Takagi S. Actin-based mechanisms for light-dependent intracellular positioning of nuclei and chloroplasts in Arabidopsis. Plant Signal Behav 2010; 5:1010-3. [PMID: 20724834 PMCID: PMC3115182 DOI: 10.4161/psb.5.8.12233] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2010] [Accepted: 05/02/2010] [Indexed: 05/19/2023]
Abstract
The plant organelles, chloroplast and nucleus, change their position in response to light. In Arabidopsis thaliana leaf cells, chloroplasts and nuclei are distributed along the inner periclinal wall in darkness. In strong blue light, they become positioned along the anticlinal wall, while in weak blue light, only chloroplasts are accumulated along the inner and outer periclinal walls. Blue-light dependent positioning of both organelles is mediated by the blue-light receptor phototropin and controlled by the actin cytoskeleton. Interestingly, however, it seems that chloroplast movement requires short, fine actin filaments organized at the chloroplast edge, whereas nuclear movement does cytoplasmic, thick actin bundles intimately associated with the nucleus. Although there are many similarities between photo-relocation movements of chloroplasts and nuclei, plant cells appear to have evolved distinct mechanisms to regulate actin organization required for driving the movements of these organelles.
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Iwabuchi K, Minamino R, Takagi S. Actin reorganization underlies phototropin-dependent positioning of nuclei in Arabidopsis leaf cells. Plant Physiol 2010; 152:1309-19. [PMID: 20107027 PMCID: PMC2832274 DOI: 10.1104/pp.109.149526] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2009] [Accepted: 01/22/2010] [Indexed: 05/18/2023]
Abstract
In epidermal and mesophyll cells of Arabidopsis (Arabidopsis thaliana) leaves, nuclei become relocated in response to strong blue light. We previously reported that nuclear positions both in darkness and in strong blue light are regulated by the blue light receptor phototropin2 in mesophyll cells. Here, we investigate the involvement of phototropin and the actin cytoskeleton in nuclear positioning in epidermal cells. Analysis of geometrical parameters revealed that, in darkness, nuclei were distributed near the center of the cell, adjacent to the inner periclinal wall, independent of cell shape. Dividing the anticlinal wall into concave, convex, and intermediate regions indicated that, in strong blue light, nuclei became relocated preferably to a concave region of the anticlinal wall, nearest the center of the cell. Mutant analyses verified that light-dependent nuclear positioning was regulated by phototropin2, while dark positioning of nuclei was independent of phototropin. Nuclear movement was inhibited by an actin-depolymerizing reagent, latrunculin B, but not by a microtubule-disrupting reagent, propyzamide. Imaging actin organization by immunofluorescence microscopy revealed that thick actin bundles, periclinally arranged parallel to the longest axis of the epidermal cell, were associated with the nucleus in darkness, whereas under strong blue light, the actin bundles, especially in the vicinity of the nucleus, became arranged close to the anticlinal walls. Light-dependent changes in the actin organization were clear in phot1 mutant but not in phot2 and phot1phot2 mutants. We propose that, in Arabidopsis, blue-light-dependent nuclear positioning is regulated by phototropin2-dependent reorganization of the actin cytoskeleton.
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Affiliation(s)
- Kosei Iwabuchi
- Department of Biological Sciences, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
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Miyazaki Y, Iwabuchi K, Kikuchi S, Fukazawa T, Niino M, Hirotani M, Sasaki H, Onoé K. Expansion of CD4+CD28- T cells producing high levels of interferon-{gamma} in peripheral blood of patients with multiple sclerosis. Mult Scler 2008; 14:1044-55. [PMID: 18573819 DOI: 10.1177/1352458508092809] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
CD4(+) T cells that lack surface expression of the CD28 co-stimulatory molecule (CD4(+)CD28(-) T cells) were expanded in peripheral blood of patients with multiple sclerosis (MS) [5.20 +/- 1.67% vs 13.00 +/- 2.68% (healthy controls (HC) versus patients with MS)]. Both the CD4(+)CD28(+) and CD4(+)CD28(-) T-cell populations of patients with MS produced higher levels of interferon (IFN)-gamma compared with those in HC. In particular, the proportion of IFN-gamma(+) cells among CD4(+)CD28(-) T cells from patients with MS was considerably high. However, expression of co-stimulatory molecules including inducible costimulator (ICOS), activating natural killer receptors, or members of tumor necrosis factor receptor family that replace CD28 in CD4(+)CD28(-) T cells of patients with MS could not be identified. A unique subpopulation bearing the CD45RA(high)CCR7(-) phenotype was identified among the CD4(+)CD28(-) T cells of some patients with MS. Because only MS samples contained this CD45RA(high)CCR7(-) population attributed to terminally differentiated effector memory cells and lacked naive CD45RA(high)CCR7(+) cells, we suggest that CD4(+)CD28(-) T cells of patients with MS represent a cell population which is in more differentiated state than healthy subjects. In patients treated with IFN-beta-1b, IFN-gamma production from CD4(+)CD28(+) T cells was suppressed compared with that in untreated patients. On the contrary, in the CD4(+)CD28(-) population, production of IFN-gamma in IFN-beta-1b-treated patients was not significantly suppressed compared with that in untreated patients with MS. Thus, an additional treatment strategy that specifically targets this cell population may enhance the beneficial effect of IFN-beta on MS.
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Affiliation(s)
- Y Miyazaki
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
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15
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Iwabuchi K, Takagi S. How and why do plant nuclei move in response to light? Plant Signal Behav 2008; 3:266-268. [PMID: 19704650 PMCID: PMC2634198 DOI: 10.4161/psb.3.4.5213] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2008] [Accepted: 10/28/2007] [Indexed: 05/28/2023]
Abstract
We recently found that nuclei take different intracellular positions depending upon dark and light conditions in Arabidopsis thaliana leaf cells. Under dark conditions, nuclei in both epidermal and mesophyll cells are distributed baso-centrally within the cell (dark position). Under light conditions, in contrast, nuclei are distributed along the anticlinal walls (light position). Nuclear repositioning from the dark to light positions is induced specifically by blue light at >50 micromol m(-2) s(-1) in a reversible manner. Using analysis of mutant plants, it was demonstrated that the response is mediated by the blue-light photoreceptor phototropin2. Intriguingly, phototropin2 also seems to play an important role in the proper positioning of nuclei and chloroplasts under dark conditions. Light-dependent nuclear positioning is one of the organelle movements regulated by phototropin2. However, the mechanisms of organelle motility, physiological significance, and generality of the phenomenon are poorly understood. In this addendum, we discussed how and why nuclei move depending on light, together with future perspectives.
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Affiliation(s)
- Kosei Iwabuchi
- Department of Biological Sciences; Graduate School of Science; Osaka University; Toyonaka, Osaka, Japan
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Sekigawa I, Yanagida M, Iwabuchi K, Kaneda K, Kaneko H, Takasaki Y, Jung G, Sone S, Tanaka Y, Ogawa H, Takamori K. Protein biomarker analysis by mass spectrometry in patients with rheumatoid arthritis receiving anti-tumor necrosis factor-alpha antibody therapy. Clin Exp Rheumatol 2008; 26:261-267. [PMID: 18565247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVE To investigate the mechanism of action of anti-tumor necrosis factor-alpha (TNF-alpha) antibody in patients with rheumatoid arthritis (RA), we analyzed serum or plasma proteins by mass spectrometry system. METHODS Ten RA patients who received treatment with anti-TNF-alpha antibody were studied. Samples obtained before and after therapy were analyzed by a two-dimensional liquid chromatography tandem mass spectrometry (2D LC-MS/MS) system after pretreatment by a recently developed method to remove high molecular weight proteins. RESULTS Using this system, certain proteins were identified after treatment with anti-TNF-alpha antibody, including proteins related to the TNF-alpha-mediated pathway for nuclear factor kappa B (NF-kappaB) activation and/or to the metabolism (including regeneration) of articular cartilage. CONCLUSION Our mass spectrometry system appears to be useful for proteomic analysis. The efficacy of anti-TNF-alpha antibody therapy for RA may be related to various consequence of the inhibition of TNF-alpha activity.
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Affiliation(s)
- I Sekigawa
- Department of Internal Medicine, Juntendo University Urayasu Hospital, Chiba, Japan.
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Miyazaki Y, Iwabuchi K, Iwata D, Miyazaki A, Kon Y, Niino M, Kikuchi S, Yanagawa Y, Kaer LV, Sasaki H, Onoé K. Effect of high fat diet on NKT cell function and NKT cell-mediated regulation of Th1 responses. Scand J Immunol 2008; 67:230-7. [PMID: 18226013 DOI: 10.1111/j.1365-3083.2007.02062.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Diet is one of the important factors that modulate immune responses. In the present study, we have examined the capacity of dietary lipids to modify immune responses in mice and we have investigated the contribution of glycolipid-reactive natural killer T (NKT) cells in this process. Mice fed, high fat diet (HFD; 21.2% fat, 0.20% cholesterol) for 3 weeks, as compared with mice fed standard fat diet (SFD; 4.3% fat, 0.03% cholesterol), showed significantly reduced interferon-gamma production in sera at 6 or 12 h after intraperitoneal injection of an NKT cell ligand, alpha-galactosylceramide. In contrast, production of interleukin-13 was significantly higher at 2 and 6 h in HFD fed mice compared with mice on SFD. No difference was detected in the serum interleukin-4 levels between these two groups of animals. The proportion of NKT cells in spleen and liver was reduced in mice fed HFD compared with those on SFD. In addition, activation of NKT cells assessed by up-regulation of CD69 was suppressed specifically in liver from mice fed HFD. Recall responses of conventional T cells and delayed-type hypersensitivity (Th1 type) against ovalbumin were significantly suppressed in mice fed HFD in comparison with those fed SFD. This suppression was not observed in CD1d-/- mice, suggesting that NKT cells in mice fed HFD played a role in suppressing Th1 responses. Taken together, our findings suggest a critical link between NKT cells, dietary lipid and adaptive immune responses.
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Affiliation(s)
- Y Miyazaki
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Japan
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Araya J, Kawabata Y, Tomichi N, Kaneko K, Hayashi K, Iwabuchi K, Terasaki Y, Kawashima T, Watanabe M. Allergic inflammatory reaction is involved in necrosis of human pulmonary dirofilariasis. Histopathology 2007; 51:484-90. [PMID: 17880530 DOI: 10.1111/j.1365-2559.2007.02822.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [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
AIMS To determine whether, in view of the massive inflammatory cell infiltration and the rounded rather than wedge-shaped character of pulmonary lesions in dirofilariasis, the inflammatory response against the worm contributes to the coagulative necrosis, in addition to an ischaemic process. METHODS AND RESULTS The histopathological features of 13 resected dirofilariasis cases with well-defined nodules ranged from 10 to 30 mm were analysed. On routine histology and using immunohistochemistry, the peripheral encapsulating wall showed mild to severe infiltration of eosinophils, lymphocytes and plasma cells and a histiocytic reaction in all cases, often with necrotic eosinophils seen within the necrosis (84.6%) and inflammatory changes in the adjacent lung (38.5%). The CD4+ lymphocyte count (80.8 +/- 33.4) was greater than that of CD8+ lymphocytes (24.5 +/- 16.9) in the central necrosis and vice versa in the wall. In the necrotic regions, disruption of the pulmonary artery (61.5%) and extravasation of the torn worm (23.1%) could be seen. CONCLUSIONS These findings indicate that an allergic inflammatory reaction, mediated by eosinophils and lymphocytes, is involved in the formation of the dirofilarial necrotizing granuloma rather than infarction caused simply by embolism.
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Affiliation(s)
- J Araya
- Section of Pathology, Saitama Cardiovascular and Respiratory Centre, Saitama, Japan
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19
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Abstract
The plant nucleus changes its intracellular position not only upon cell division and cell growth but also in response to environmental stimuli such as light. We found that the nucleus takes different intracellular positions depending on blue light in Arabidopsis thaliana leaf cells. Under dark conditions, nuclei in mesophyll cells were positioned at the center of the bottom of cells (dark position). Under blue light at 100 mumol m(-2) s(-1), in contrast, nuclei were located along the anticlinal walls (light position). The nuclear positioning from the dark position to the light position was fully induced within a few hours of blue light illumination, and it was a reversible response. The response was also observed in epidermal cells, which have no chloroplasts, suggesting that the nucleus has the potential actively to change its position without chloroplasts. Light-dependent nuclear positioning was induced specifically by blue light at >50 mumol m(-2) s(-1). Furthermore, the response to blue light was induced in phot1 but not in phot2 and phot1phot2 mutants. Unexpectedly, we also found that nuclei as well as chloroplasts in phot2 and phot1phot2 mutants took unusual intracellular positions under both dark and light conditions. The lack of the response and the unusual positioning of nuclei and chloroplasts in the phot2 mutant were recovered by externally introducing the PHOT2 gene into the mutant. These results indicate that phot2 mediates the blue light-dependent nuclear positioning and the proper positioning of nuclei and chloroplasts. This is the first characterization of light-dependent nuclear positioning in spermatophytes.
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Affiliation(s)
- Kosei Iwabuchi
- Department of Biological Sciences, Graduate School of Science, Osaka University, Toyonaka, Osaka, Japan.
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20
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Kitamura M, Kitaichi N, Takeuchi M, Kitamei H, Namba K, Yamagishi SI, Iwabuchi K, Onoé K, Ohno S. Decrease in the glyceraldehyde derived advanced glycation end products in the sera of patients with Vogt-Koyanagi-Harada disease. Br J Ophthalmol 2005; 89:1407-9. [PMID: 16234440 PMCID: PMC1772931 DOI: 10.1136/bjo.2005.072678] [Citation(s) in RCA: 7] [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: 11/04/2022]
Abstract
BACKGROUND/AIMS Advanced glycation end products (AGEs) are considered to act as mediators of both age related pathologies and diabetic complications. It was recently reported that glyceraldehyde derived AGE (AGE-2) has a strong biological effect on various diseases. The aim of this study was to investigate the serum AGE-2 levels in Vogt-Koyanagi-Harada (VKH) disease. METHODS Sera were obtained from 31 patients with active VKH. 20 of these 31 patients were treated with systemic corticosteroids. As controls, 33 healthy volunteers were also examined. The serum AGE-2 levels were determined with a competitive enzyme linked immunosorbent assay using AGE-2 polyclonal antibody. RESULTS The mean AGE-2 level in the sera of patients with VKH disease was 4.91 (SD 2.23) U/ml, which was significantly lower than that of the healthy control subjects (8.32 (2.94), p<0.001). The average serum AGE-2 level significantly increased to 13.49 (2.17) U/ml after the patients were treated with systemic corticosteroids (p<0.001). CONCLUSIONS These results suggest that AGE-2 may be involved in the onset of VKH disease.
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Affiliation(s)
- M Kitamura
- Department of Ophthalmology and Visual Sciences, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
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Abstract
Characean internodal cells generate receptor potential in response to mechanical stimuli. We studied responses of internodal cells to a long-lasting stimulus and the results were as follows. (i) The cell generated receptor potential at the moment of both compression and decompression. (ii) The receptor potential (DeltaE (m)) was significantly larger at the moment of decompression than at compression. (iii) The longer the duration of the stimulus, the larger was the magnitude of DeltaE (m) at the moment of decompression. (iv) Aequorin studies revealed that the increase in [Ca(2+)](c) (Delta[Ca(2+)](c)) took place at the moment of both compression and decompression. (v) The amplitude of Delta[Ca(2+)](c) was larger at the moment of decompression than at compression, as was the case for DeltaE (m). It was suggested that the amplitude of the receptor potential had a tight correlation with the degree of membrane deformation. We discussed the ionic mechanism of mechano-perception under a long-lasting stimulus in relation to mechanosensitive activation of Ca(2+) channels at the plasma membrane.
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Affiliation(s)
- Kosei Iwabuchi
- Graduate School of Science and Technology, Niigata University, Igarashi, Japan
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Hua J, Suguro S, Iwabuchi K, Tsutsumi-Ishii Y, Sakamoto K, Nagaoka I. Glucosamine, a naturally occurring amino monosaccharide, suppresses the ADP-mediated platelet activation in humans. Inflamm Res 2005; 53:680-8. [PMID: 15654516 DOI: 10.1007/s00011-004-1312-y] [Citation(s) in RCA: 13] [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: 10/25/2022] Open
Abstract
OBJECTIVE To evaluate the anti-thrombotic action of glucosamine, a naturally occurring amino monosaccharide, platelets were stimulated with ADP in the presence of glucosamine, and its effects on platelet functions were examined. MATERIALS AND METHODS Human platelet-rich plasma was stimulated with 2.5 microM ADP in the presence of glucosamine (0.01 approximately 1 mM) or other aminosugars (N-acetyl-glucosamine, galactosamine or N-acetyl-galactosamine, 1 mM), and platelet aggregation was monitored. Furthermore, the effects of glucosamine on the thromboxane A2 production, release of granule contents, intracellular calcium mobilization and phosphorylation of Syk (a 72 kD protein tyrosine kinase) were evaluated following ADP-stimulation. In addition, the binding of [3H] ADP to its receptors was examined. RESULTS Glucosamine (>0.01 mM) dose-dependently suppressed platelet aggregation in response to ADP (p < 0.05), whereas N-acetyl-glucosamine, galactosamine or N-acetyl-galactosamine (1 mM) did not affect the ADP-induced platelet aggregation. Furthermore, glucosamine (>0.1 mM) inhibited the extracellular release of granule contents (ATP and platelet factor 4) and production of thromboxane A2 from ADP-stimulated platelets (p < 0.05). Moreover, glucosamine significantly repressed the intracellular calcium mobilization at >0.1 mM and phosphorylation of Syk at >0.01 mM upon ADP-stimulation (p < 0.05). In addition, glucosamine (>0.1 mM) inhibited the binding of ADP to its receptors (p < 0.05). CONCLUSION Glucosamine is able to suppress platelet aggregation, release of granule constituents, thromboxane A2 production, calcium mobilization and phosphorylation of Syk possibly via the inhibition of ADP-binding to the receptors. Glucosamine could be expected as a novel anti-platelet agent for thrombotic disorders due to its suppressive actions on platelets.
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Affiliation(s)
- J Hua
- Department of Host Defense and Biochemical Research, School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
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Kawamura K, Fujikawa-Yamamoto K, Ozaki M, Iwabuchi K, Nakashima H, Domiki C, Morita N, Inoue M, Tokunaga K, Shiba N, Ikeda R, Suzuki K. Centrosome hyperamplification and chromosomal damage after exposure to radiation. Oncology 2005; 67:460-70. [PMID: 15714003 DOI: 10.1159/000082931] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2003] [Accepted: 04/23/2004] [Indexed: 01/15/2023]
Abstract
OBJECTIVE In order to elucidate the effects of radiation on centrosome hyperamplification (CH), we examined the centrosome duplication cycle in KK47 bladder cancer cells following irradiation. METHODS KK47 cells were irradiated with various doses of radiation and were examined for CH immunostaining for gamma-tubulin. RESULTS Nearly all control cells contained one or two centrosomes, and mitotic cells displayed typical bipolar spindles. The centrosome replication cycle is well regulated in KK47. Twenty-four hours after 5-Gy irradiation, approximately 80% of irradiated cells were arrested in G2 phase, and at 48 h after irradiation, 56.9% of cells contained more than two centrosomes. Laser scanning cytometry performed 48 h after irradiation showed the following two pathways: (1) unequal distribution of chromosomes to daughter cells, or (2) failure to undergo cytokinesis, resulting in polyploidy. With mitotic collection, M-phase cells with CH could be divided into G1 cells with micronuclei and polyploidal cells. Fluorescence in situ hybridization analysis showed clear signs of chromosomal instability (CIN) at 48 h after irradiation. The present study had two major findings: (1) continual duplication of centrosomes occurred in the cell cycle-arrested cells upon irradiation, leading to centrosome amplification; (2) cytokinesis failure was due to aberrant mitotic spindle formation caused by the presence of amplified centrosomes. Abnormal mitosis with amplified centrosomes was detected in the accumulating G2/M population after irradiation, showing that this amplification of centrosomes was not caused by failure to undergo cytokinesis, but rather that abnormal mitosis resulting from amplification of centrosomes leads to cytokinesis block. CONCLUSION These results suggest that CH is a critical event leading to CIN following exposure to radiation.
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Affiliation(s)
- K Kawamura
- Department of Urology, Kanazawa Medical University, Daigaku Uchinada, Ishikawa, Japan.
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Takagi D, Iwabuchi K, Iwabuchi C, Nakamaru Y, Maguchi S, Ohwatari R, Furuta Y, Fukuda S, Joyce S, Onoé K. Immunoregulatory defects of V alpha 24V+ beta 11+ NKT cells in development of Wegener's granulomatosis and relapsing polychondritis. Clin Exp Immunol 2004; 136:591-600. [PMID: 15147365 PMCID: PMC1809067 DOI: 10.1111/j.1365-2249.2004.02471.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The frequency of either CD4(-)8(-) (double negative; DN) or CD4(+) V alpha 24(+)V beta 11(+) NKT cells, the expression of CD1d and the binding of CD1d-tetramer loaded with alpha-galactosylceramide (alpha-GalCer) to NKT cells were analysed in peripheral blood mononuclear cells (PBMCs) of patients with Wegener's granulomatosis (WG), relapsing polychondritis (RP) and healthy subjects (HS). DN and CD4(+) V alpha 24(+)V beta 11(+) NKT cells as well as CD1d-alpha-GalCer tetramer-positive NKT cells, were significantly decreased in number in both WG and RP patients compared to those from HS. When cytokine profiles were analysed in these PBMCs upon stimulation with phorbol ester and calcium ionophore, CD4(+) T cells from patients with WG and RP exhibited a Th1 bias, whereas CD4(+) NKT cells from WG patients in remission showed a Th2 bias. These findings suggest that NKT cells (especially CD4(+) NKT cells) play a regulatory role in Th1 autoimmunity in patients with WG and RP. The reduction in NKT cell counts appears to be associated with the low responsiveness to alpha-GalCer. The dysfunction of NKT cells to recognize ligands such as alpha-GalCer may also contribute to the defects observed in NKT cells from WG and RP patients.
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Affiliation(s)
- D Takagi
- Department of Otolaryngology-Head and Neck Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Ishii H, Yanagimoto K, Iwabuchi K, Kudo M, Yoneyama J, Okada S, Ebihara Y. Two different manifestations of the effect of apoptosis on pulmonary capillary haemangiomatosis; localized and diffuse lesions. Histopathology 2003; 43:305-6. [PMID: 12940788 DOI: 10.1046/j.1365-2559.2003.01673.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Nagaoka U, Uchihara T, Iwabuchi K, Konno H, Tobita M, Funata N, Yagishita S, Kato T. Attenuated nuclear shrinkage in neurones with nuclear inclusions of SCA1 brains. J Neurol Neurosurg Psychiatry 2003; 74:597-601. [PMID: 12700301 PMCID: PMC1738416 DOI: 10.1136/jnnp.74.5.597] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Spinocerebellar ataxia type 1 (SCA1) is one of the autosomal dominant neurodegenerative disorders commonly linked to pathological expansion of the CAG repeat of the relevant gene. Nuclear inclusions and neurodegeneration are both triggered by this pathological expansion of the CAG/polyglutamine repeat on ataxin-1, but it remains to be determined whether or not nuclear inclusion formation is associated with accelerated neurodegeneration. OBJECTIVE To examine the influence of nuclear inclusions on nuclear size and deformity in human brains from patients suffering from SCA1. MATERIAL Pontine sections of brains obtained at necropsy from seven patients with SCA1 and five controls. METHODS The size and deformity of each neuronal nucleus was quantified. Nuclei with and without inclusions were examined separately to assess the possible influence of nuclear inclusions on neurodegeneration. RESULTS Nuclear shrinkage and deformity were more marked in SCA1 brains than in controls. This shrinkage was attenuated in neurones containing nuclear inclusions. CONCLUSIONS The existence of nuclear inclusions in SCA1 is presumably linked to a mechanism that attenuates rather than accelerates nuclear shrinkage. This in vivo finding may provide a clue to constructing a rational therapeutic strategy for combating neurodegeneration associated with nuclear inclusions.
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Affiliation(s)
- U Nagaoka
- Department of Neurology, Tokyo Metropolitan Neurological Hospital, Tokyo, Japan
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Abstract
BACKGROUND Acid induced pneumonitis resulting in acute respiratory distress syndrome (ARDS) is characterised by increased alveolar permeability and accumulation of neutrophils. It is hypothesised that vascular endothelial growth factor (VEGF) is involved in the development of lung oedema. Furthermore, lower levels of VEGF are detected in bronchoalveolar lavage fluid from patients with ARDS than from non-ARDS patients. We hypothesised that VEGF acts cytoprotectively and have investigated this possibility in vitro with A549 cells. METHODS A549 cells were incubated in 24 well culture dishes 24 hours before exposure to acid, then incubated with serum free medium containing various concentrations of HCl for 30 minutes at 37 degrees C in 5% CO(2). The acidified medium was changed to normal complete medium; at specified incubation periods the supernatants were collected and the VEGF concentration measured and the number of adherent cells counted. RESULTS Proliferation of A549 cells and VEGF production were suppressed for at least 48 hours in HCl at a concentration of 50 mM. Restoration of cellular proliferation occurred following exogenous administration of VEGF (concentration of 1-250 ng/ml) and was inhibited by co-incubation with neutralising anti-VEGF antibody, indicating an interaction between VEGF molecules and A549 cells. Control cells were not influenced by administration of exogenous VEGF or anti-VEGF antibody. Treatment with neutralising anti-VEGF receptor (VEGFR) antibodies against VEGFR-1 and VEGFR-2 suppressed proliferation of acid exposed A549 cells but had no effect on control cells. CONCLUSIONS Exogenous VEGF interacts with VEGFR-1 and VEGFR-2 on the surface and regulates the proliferation of injured alveolar lining epithelial cells in an autocrine or paracrine fashion.
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Affiliation(s)
- A Ohwada
- Department of Respiratory Medicine, Juntendo University School of Medicine, Tokyo, Japan.
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Niitsu N, Nakamine H, Kohri M, Hayama M, Tamaru J, Iwabuchi K, Tanabe S, Horie R, Higashihara M. Primary gastric T-cell lymphoma not associated with human T-lymphotropic virus type I: a case report and review of the literature. Ann Hematol 2003; 82:197-202. [PMID: 12634958 DOI: 10.1007/s00277-003-0612-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2002] [Accepted: 01/03/2003] [Indexed: 10/25/2022]
Abstract
Primary gastric T-cell lymphoma (PGTL) not associated with human T-lymphotropic virus type I (HTLV-I) is extremely rare and such a case is reported herein. The patient was a 58-year-old Japanese male presenting with submucosal tumor of the stomach identified on endoscopic examination. The lesion was diagnosed as non-Hodgkin's lymphoma by endoscopic biopsy and classified as peripheral T-cell lymphoma, unspecified, due to clonal rearrangement of the T-cell receptor beta (TCR) gene and expression of TCR beta protein in the absence of B-cell genotypes and phenotypes. Unlike previously reported cases of HTLV-I-unassociated PGTL, lymphoma in the current case was characterized histologically as "low grade" and phenotypically as CD4+, TIA-1+, granzyme B+, and CD103-. The lymphoma responded well to chemotherapy and radiation, and the patient was well with no detectable disease 10 months after initiation of therapy. A review of patients with PGTL in the literature revealed a few long-term survivors, and the investigation of therapeutic strategies for PGTL is, therefore, necessary.
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Affiliation(s)
- N Niitsu
- Department of Internal Medicine IV, Kitasato University School of Medicine, Kanagawa, Japan.
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29
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Abstract
In this study, spinach plants were grown under atmospheric and low pressure conditions with constant O2 and CO2 partial pressures, and the effects of low total pressure on gas exchange rates were investigated. CO2 assimilation and transpiration rates of spinach grown under atmospheric pressure increased after short-term exposure to low total pressure due to the enhancement of leaf conductance. However, gas exchange rates of plants grown at 25 kPa total pressure were not greater than those grown at atmospheric pressure. Stomatal pore length and width were significantly smaller in leaves grown at low total pressure. This result suggested that gas exchange rates of plants grown under low total pressure were not stimulated even with the enhancement of gas diffusion because the stomatal size and stomatal aperture decreased.
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Affiliation(s)
- K Iwabuchi
- Department of Biological and Environmental Engineering, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
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30
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Koyano S, Iwabuchi K, Yagishita S, Kuroiwa Y, Uchihara T. Paradoxical absence of nuclear inclusion in cerebellar Purkinje cells of hereditary ataxias linked to CAG expansion. J Neurol Neurosurg Psychiatry 2002; 73:450-2. [PMID: 12235319 PMCID: PMC1738092 DOI: 10.1136/jnnp.73.4.450] [Citation(s) in RCA: 41] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Degeneration of cerebellar cortex is one of the principal features of hereditary ataxias linked to expansion of CAG repeat. In an attempt to clarify possible correlation between neuronal depletion and neuronal intranuclear inclusions, both triggered by the pathological expansion of CAG repeat, cerebellar sections from SCA1, SCA2, SCA3, and DRPLA cases were immunostained with anti-ubiquitin or anti-expanded polyglutamine antibody (1C2) and were screened for the presence of neuronal intranuclear inclusions. Although the degree of cerebellar degeneration varied greatly, cerebellar Purkinje cells were uniformly characterised by the absence of neuronal intranuclear inclusion. Complete absence of neuronal intranuclear inclusion in Purkinje cells is apparently paradoxical and hardly explained if neuronal intranuclear inclusion formation is positively correlated to a mechanism accelerating neuronal death. It may, otherwise, suggest an intrinsic link between neuronal intranuclear inclusion formation and neurodegeneration in opposite directions in human Purkinje cells, more or less affected in these CAG repeat disorders.
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Affiliation(s)
- S Koyano
- Department of Neurology, Yokohama City University, Yokohama, Japan
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31
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Kikuchi S, Shinpo K, Niino M, Tsuji S, Iwabuchi K, Onoé K, Tashiro K. Prostaglandin E1 protects cultured spinal neurons against the effects of nitric oxide toxicity. Neuropharmacology 2002; 42:714-23. [PMID: 11985830 DOI: 10.1016/s0028-3908(02)00020-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The effects of prostaglandin (PG) E(1) on NO neurotoxicity were examined using rat cultured spinal neurons. Rat cultured spinal neurons exposed to the NO donor, 2,2'-(hydroxynitrosohydrazono) bis-ethanamine (NOC18), showed neurotoxic effects that were accompanied by apoptotic nuclear change, free radical generation, a reduction in glutathione, and mitochondrial dysfunction. PGE(1), at concentrations of 1-100 nM, protected cultured spinal neurons from NO toxicity by reversing the oxidative and pro-apoptotic properties elicited by NOC18 exposure. The administration of PGE(1) increased the intracellular cyclic AMP (cAMP) levels in cultured spinal neurons. In addition, reverse transcriptase-polymerase chain reaction (RT-PCR) analysis confirmed the existence of EP4, a cAMP-elevating PGE receptor, in cultured spinal neurons. The protective effects of PGE(1) against NO neurotoxicity was partially blocked by an inhibitor of MEK [the mitogen-activated protein kinase (MAPK)/extracellular-signal-regulated kinase (ERK) kinase], suggesting that the MAPK/ERK pathway may play a significant role in the activity of PGE(1). PGE(1) up-regulated the expression of the anti-apoptotic protein, Bcl-2, as determined by Western blot analysis. PGE(1) also induced the expression of thioredoxin in cultured spinal neurons. Our data indicate that PGE(1) exerts a protective action against NO neurotoxicity in cultured spinal neurons, and suggests a therapeutic potential of PGE(1) against spinal cord disease, such as amyotrophic lateral sclerosis.
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Affiliation(s)
- S Kikuchi
- Department of Neurology, Hokkaido University School of Medicine, Kita-15, Nishi-7, Kita-ku, Sapporo 060-8638, Japan.
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32
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Kizaki T, Suzuki K, Hitomi Y, Iwabuchi K, Onoé K, Haga S, Ishida H, Ookawara T, Suzuki K, Ohno H. Negative regulation of LPS-stimulated expression of inducible nitric oxide synthase by AP-1 in macrophage cell line J774A.1. Biochem Biophys Res Commun 2001; 289:1031-8. [PMID: 11741294 DOI: 10.1006/bbrc.2001.6123] [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: 11/22/2022]
Abstract
The level of NOS II mRNA was markedly increased during 24 h lipopolysaccharide (LPS) stimulation, but showed no further increase thereafter. On the other hand, the level of NOS II mRNA in J774A.1 cells transfected with an expression vector containing the rat csk cDNA (J.Csk) was significantly increased during 3 h LPS stimulation, but rather decreased thereafter. Although no significant difference was observed in the activation of NF-kappaB by LPS among parental J774A.1, J774A.1 transfected with promoterless vector (J.pBK), and J.Csk cells, activity of c-Jun N-terminal kinase (JNK) and nuclear translocation of nuclear factor activator protein-1 (AP-1) were markedly upregulated in the J.Csk cells. Then luciferase reporter vectors containing NOS II promoter with mutations in two AP-1-like sites (U site, -1126 approximately -1120; L site, -524 approximately -518) were transiently transfected in J774A.1 cells. The promoter activity following LPS stimulation for 24 h was significantly increased by mutation at the L site, but not by mutation at the U site, suggesting that NOS II expression is negatively regulated, at least in part, through the AP-1-like L site in response to LPS.
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Affiliation(s)
- T Kizaki
- Department of Molecular Predictive Medicine and Sport Science, Kyorin University, Mitaka, Japan.
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33
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Watanabe J, Iwabuchi K, Koseki Y, Fukuchi M, Shinozaki T, Miura M, Komaru T, Kagaya Y, Shirato K, Kitaoka S, Ishide N, Takishima T. Declining trend in the in-hospital case-fatality rate from acute myocardial infarction in Miyagi Prefecture from 1980 to 1999. Jpn Circ J 2001; 65:941-6. [PMID: 11716243 DOI: 10.1253/jcj.65.941] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The case-fatality rate from acute myocardial infarction (AMI) appears to have been declining in recent decades, so the present study reviewed the trend in in-hospital case-fatalities from AMI in Miyagi Prefecture, Japan, 1980-1999. The causes of death and the effects of gender and age on the trend were also analyzed. From the AMI registration database of the Miyagi Study Group for AMI, 12,961 cases of AMI were analyzed. The 30-day in-hospital case-fatality was calculated from the data for 1980-1999: data for causes of death were available for 1980-1997, and the data concerning primary percutaneous transluminal coronary angioplasty (PTCA) for AMI were available for 1997-1999. The in-hospital case-fatality rate declined from 17.0% in the early 80s to 7.3% in the late 90s (approximately 57% reduction). The in-hospital case-fatality rate was higher in female patients. Rhythm failure substantially decreased in the late 1980s. Pump failure is decreasing, but is still the biggest problem. The in-hospital case-fatality rate was significantly lower in patients received PTCA. The declining trend in the in-hospital case-fatality rate suggests the benefits of current therapeutic procedures, including primary PTCA, for AMI. Pump failure is an important target for further decreasing the trend.
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Affiliation(s)
- J Watanabe
- Tohoku University Graduate School of Medicine, Department of Cardiovascular Medicine, Sendai, Japan
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34
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Watano K, Iwabuchi K, Fujii S, Ishimori N, Mitsuhashi S, Ato M, Kitabatake A, Onoé K. Allograft inflammatory factor-1 augments production of interleukin-6, -10 and -12 by a mouse macrophage line. Immunology 2001; 104:307-16. [PMID: 11722645 PMCID: PMC1783316 DOI: 10.1046/j.1365-2567.2001.01301.x] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.2] [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: 02/07/2023] Open
Abstract
Mouse allograft inflammatory factor-1 (AIF-1) cDNA was cloned and the AIF-1-specific monoclonal antibodies were established to examine its tissue distribution. The mouse AIF-1 was highly conserved among all reported AIF-1 from a variety of species, from invertebrates to mammals, and the cloned cDNA was in good accordance with putative expressed regions of genomic sequences in the mouse major histocompatibility complex (MHC) class III region. The messages of mouse AIF-1 were abundantly expressed in the testis, moderately in the spleen and lymph nodes and slightly in the liver and thymus of normal BALB/c mice. Immunohistological examination revealed that differentiating germ cells in the testis and presumably macrophages in the red pulp of the spleen were positive for AIF-1. To analyse the function of the AIF-1, a macrophage cell line, RAW 264.7, was transfected with mouse AIF-1 cDNA. Upon stimulation with bacterial lipopolysaccharide, the transfectants that overexpressed AIF-1 showed marked morphological changes and produced significantly large amounts of interleukin (IL)-6, IL-10 and IL-12p40 but not IL-12p70 compared with control cells. No difference was noted in production of tumour necrosis factor-alpha, transforming growth factor-beta1 and IL-1alpha. These results suggest that AIF-1 plays an important role in cells of a monocyte/macrophage lineage upon stimulation with inflammatory stimuli by augmenting particular cytokine production.
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Affiliation(s)
- K Watano
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
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35
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Ohwatari R, Fukuda S, Iwabuchi K, Inuyama Y, Onoé K, Nishihira J. Serum level of macrophage migration inhibitory factor as a useful parameter of clinical course in patients with Wegener's granulomatosis and relapsing polychondritis. Ann Otol Rhinol Laryngol 2001; 110:1035-40. [PMID: 11713914 DOI: 10.1177/000348940111001108] [Citation(s) in RCA: 26] [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: 01/06/2023]
Abstract
Novel biological activities of macrophage migration inhibitory factor (MIF) have been rediscovered. In addition, elevation of the serum MIF level has been reported in different types of disorders, including various inflammatory and autoimmune diseases. In the present study, serum MIF levels were analyzed in patients with Wegener's granulomatosis (WG) and relapsing polychondritis. It was shown that the serum MIF levels in these patients were significantly higher than those of normal healthy controls. In a WG patient, the MIF level showed a good correlation with clinical symptoms and C-ANCA titers. Thus, serum MIF levels will be a useful laboratory parameter for following the clinical course of WG patients and determining medical treatment. The immunopathologic roles of MIF in these diseases are discussed.
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Affiliation(s)
- R Ohwatari
- Department of Otolaryngology-Head and Neck Surgery Graduate School of Medicine, Hokkaido University, Sapporo, Japan
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36
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Iwabuchi K, Ohta J, Sato K, Komaru T, Kagaya Y, Shirato K, Miyazaki S, Yano E, Satomi S. [Primary chylopericardium]. Nihon Naika Gakkai Zasshi 2001; 90:2085-7. [PMID: 11769505 DOI: 10.2169/naika.90.2085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- K Iwabuchi
- Tohoku University Graduate School of Medicine, Department of Cardiovascular Medicine, Sendai
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37
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Ohwatari R, Iwabuchi K, Iwabuchi C, Morohashi T, Sawa H, Hioki K, Kobayashi K, Fukuda S, Inuyama Y, Onoé K. Developmental and functional analyses of CD8(+) NK1.1(+) T cells in class-I-restricted TCR transgenic mice. Cell Immunol 2001; 213:24-33. [PMID: 11747353 DOI: 10.1006/cimm.2001.1862] [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: 11/22/2022]
Abstract
Using a class-I-restricted T cell receptor (TCR) transgenic mice (Tgm), 2C (Valpha3.1/Vbeta 8.2, specific for L(d) + LSPFPFDL), the development and cytokine production of tg-TCR(+) NKT cells were analyzed. We found that CD8(+) or double negative (DN) NKT cells constituted a major population of NKT cells in the H-2(b/b) 2C Tgm (positive selecting background) or the H-2(b/d) 2C Tgm (negative selecting background), respectively. Virtually no NKT cells were generated in the H-2(k/k) 2C Tgm (neutral selecting background). CD8(+) NKT cells in the H-2(b/b) 2C Tgm expressed CD8alphabeta heterodimers, whereas those in the H-2(b/d) 2C Tgm expressed CD8alphaalpha homodimers. These findings suggest that development of a subpopulation of NKT cells is influenced by the H-2 molecules. Upon stimulation with anti-CD3 mAb, tg-TCR(+) NKT cells generated in the H-2(b/b) and H-2(b/d) backgrounds produced IFN-gamma, but not IL-4.
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MESH Headings
- Animals
- Antigens/immunology
- Antigens, Ly
- Antigens, Surface
- CD8-Positive T-Lymphocytes/immunology
- Cell Membrane/immunology
- Cells, Cultured
- DNA-Binding Proteins/immunology
- H-2 Antigens/immunology
- Homeodomain Proteins/immunology
- Immunophenotyping
- Interferon-gamma/biosynthesis
- Interleukin-4/biosynthesis
- Lectins, C-Type
- Liver/immunology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- NK Cell Lectin-Like Receptor Subfamily B
- Proteins/immunology
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Receptors, Antigen, T-Cell, alpha-beta/immunology
- Spleen/cytology
- Spleen/immunology
- Thymus Gland/cytology
- Thymus Gland/immunology
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Affiliation(s)
- R Ohwatari
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo 060-0815, Japan
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38
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Date H, Onodera O, Tanaka H, Iwabuchi K, Uekawa K, Igarashi S, Koike R, Hiroi T, Yuasa T, Awaya Y, Sakai T, Takahashi T, Nagatomo H, Sekijima Y, Kawachi I, Takiyama Y, Nishizawa M, Fukuhara N, Saito K, Sugano S, Tsuji S. Early-onset ataxia with ocular motor apraxia and hypoalbuminemia is caused by mutations in a new HIT superfamily gene. Nat Genet 2001; 29:184-8. [PMID: 11586299 DOI: 10.1038/ng1001-184] [Citation(s) in RCA: 268] [Impact Index Per Article: 11.7] [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: 01/30/2023]
Abstract
Friedreich ataxia (FRDA), the most common autosomal recessive neurodegenerative disease among Europeans and people of European descent, is characterized by an early onset (usually before the age of 25), progressive ataxia, sensory loss, absence of tendon reflexes and pyramidal weakness of the legs. We have recently identified a unique group of patients whose clinical presentations are characterized by autosomal recessive inheritance, early age of onset, FRDA-like clinical presentations and hypoalbuminemia. Linkage to the FRDA locus, however, was excluded. Given the similarities of the clinical presentations to those of the recently described ataxia with oculomotor apraxia (AOA) linked to chromosome 9p13, we confirmed that the disorder of our patients is also linked to the same locus. We narrowed the candidate region and have identified a new gene encoding a member of the histidine triad (HIT) superfamily as the 'causative' gene. We have called its product aprataxin; the gene symbol is APTX. Although many HIT proteins have been identified, aprataxin is the first to be linked to a distinct phenotype.
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Affiliation(s)
- H Date
- Department of Neurology, Brain Research Institute, Niigata University, 1 Asahimachi, Niigata 951, Japan
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39
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Fujigasaki H, Uchihara T, Takahashi J, Matsushita H, Nakamura A, Koyano S, Iwabuchi K, Hirai S, Mizusawa H. Preferential recruitment of ataxin-3 independent of expanded polyglutamine: an immunohistochemical study on Marinesco bodies. J Neurol Neurosurg Psychiatry 2001; 71:518-20. [PMID: 11561037 PMCID: PMC1763515 DOI: 10.1136/jnnp.71.4.518] [Citation(s) in RCA: 25] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In an immunohistochemical study of Marinesco bodies--a neuronal intranuclear inclusion often seen in neurons of the substantia nigra of patients with hepatic encephalopathy--it was shown that one of the polyglutamine proteins, ataxin-3, is preferentially recruited into this inclusion, whereas other polyglutamine proteins (ataxin-2 and TATA box-binding protein) are not. This suggests that recruitment of each of the polyglutamine proteins may be differently regulated. Because this nuclear inclusion is thought to be formed in response to cellular stress, as occurs in hepatic encephalopathy, even in the absence of an expanded CAG/polyglutamine repeat, recruitment of ataxin-3 and ubiquitin into Marinesco bodies may represent a cellular response to noxious external stimuli unrelated to expanded CAG/polyglutamine.
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Affiliation(s)
- H Fujigasaki
- Department of Neuropathology, Tokyo Metropolitan Institute for Neuroscience, 2-6 Musashidai, Fuchu-shi, Tokyo, Japan
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40
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Nagata J, Higashiuesato Y, Maeda G, Chinen I, Saito M, Iwabuchi K, Onoē K. Effects of water-soluble hemicellulose from soybean hull on serum antibody levels and activation of macrophages in rats. J Agric Food Chem 2001; 49:4965-70. [PMID: 11600052 DOI: 10.1021/jf0104883] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Effects of soybean hull water-soluble hemicellulose (WSHC) on serum immunoglobulin (Ig) concentration and production of NO and IL-1beta from peritoneal macrophages were examined and compared with those of Agaricus blazei in the rat system. WSHC consisted of arabinose, galactose, xylose, glucose, and rhamnose, and the molecular weight was approximately 500000. Rats were ip administrated each sample at a dose of 0.67, 13.4, or 26.9 mg/kg/day for 14 days. The administration of WSHC resulted in significantly higher productions of IgM (p < 0.01 on day 6, p < 0.05 on day 14) and IgG (p < 0.05 on day 6) than those in other groups. When peritoneal macrophages were stimulated with various concentrations of sample (0.67, 13.4, or 26.9 mg/mL), WSHC significantly increased both NO and IL-1beta productions only at the concentration of 13.4 (mg/mL) compared with those of a saline group. These findings demonstrate that WSHC enhances humoral immunity and activation of macrophages, thereby leading to the augmentation of immune responses in rats.
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Affiliation(s)
- J Nagata
- Division of Food Science, National Institute of Health and Nutrition, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8636, Japan.
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41
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Yanagawa Y, Iwabuchi K, Onoé K. Enhancement of stromal cell-derived factor-1alpha-induced chemotaxis for CD4/8 double-positive thymocytes by fibronectin and laminin in mice. Immunology 2001; 104:43-9. [PMID: 11576219 PMCID: PMC1783275 DOI: 10.1046/j.1365-2567.2001.01292.x] [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: 11/20/2022] Open
Abstract
Stromal cell-derived factor-1alpha (SDF-1alpha) is a chemokine abundantly expressed in the thymus. However, a potential role of SDF-1alpha in the thymus has been under consideration, since no appreciable difference was detected in the migratory responsiveness to the SDF-1alpha between cortical and medullary thymocytes. In the present study, we examined the effects of extracellular matrix (ECM) on the responsiveness of murine thymocytes to several chemokines including SDF-1alpha. In the absence of ECM, chemotactic activity of SDF-1alpha for cortical (CD4/8 double-positive) thymocytes was almost same as that for medullary (CD4 or CD8 single-positive) thymocytes. In contrast, the chemotactic activity of SDF-1alpha for cortical thymocytes was considerably (more than 10-fold) enhanced by laminin or fibronectin as compared with that for medullary thymocytes. Chemotactic activities of macrophage-derived chemokine and macrophage inflammatory protein-3beta for both cortical and medullary thymocytes were only slightly enhanced by fibronectin or laminin. Thus, fibronectin and laminin appear to enhance the chemotactic activity of SDF-1alpha for cortical thymocytes selectively. Addition of a monoclonal antibody against CD29 showed no inhibitory effect on the enhanced chemotactic activity of SDF-1alpha, suggesting that the other unknown receptor(s) is involved in this enhancement. Our present data demonstrate that SDF-1alpha in the presence of fibronectin or laminin is involved in the distribution of developing thymocytes.
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MESH Headings
- Animals
- Antigens, CD/immunology
- Antigens, CD/metabolism
- Antigens, Differentiation, T-Lymphocyte/metabolism
- CD4-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/immunology
- Chemokine CCL19
- Chemokine CCL22
- Chemokine CXCL12
- Chemokines, CC/immunology
- Chemokines, CXC/immunology
- Chemotaxis, Leukocyte/immunology
- Extracellular Matrix/immunology
- Female
- Fibronectins/immunology
- Integrin beta1/immunology
- Integrin beta4
- Laminin/immunology
- Lectins, C-Type
- Mice
- Mice, Inbred C57BL
- Stromal Cells/immunology
- T-Lymphocyte Subsets/immunology
- Virulence Factors, Bordetella/immunology
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Affiliation(s)
- Y Yanagawa
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
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42
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Uchihara T, Fujigasaki H, Koyano S, Nakamura A, Yagishita S, Iwabuchi K. Non-expanded polyglutamine proteins in intranuclear inclusions of hereditary ataxias--triple-labeling immunofluorescence study. Acta Neuropathol 2001; 102:149-52. [PMID: 11563629 DOI: 10.1007/s004010100364] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.9] [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: 11/25/2022]
Abstract
Neuronal intranuclear inclusions (NIIs) found in CAG/polyglutamine-expansion disorders contain both expanded polyglutamine and the gene product without the CAG repeat. The gene product containing expanded polyglutamine has, therefore, been considered to be a major component of NIIs. In this immunohistochemical study, we showed recruitment of ataxin-2, ataxin-3 and TATA box binding protein (TBP) into NIIs of the pontine neurons of spinocerebellar ataxia type (SCA) 1, SCA2, SCA3 and dentatorubral-pallidoluysian atrophy brains. Triple-labeling immunofluorescence demonstrated colocalization of ataxin-2 and ataxin-3 in NIIs containing expanded polyglutamine, irrespective of the disease examined. These in vivo findings indicate that polyglutamine proteins recruited into NIIs are not restricted to their expanded form. Among these proteins, recruitment of ataxin-2 was least frequent in every case examined, suggesting that the rate of recruitment partly depends on the protein transported into NIIs. Because other proteins lacking polyglutamine motif were not detected in NIIs, it is suggested that the presence of polyglutamine is a prerequisite for these proteins to be recruited into nucleus and to form NIIs. Interaction between expanded and non-expanded polyglutamine may play roles during these processes.
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Affiliation(s)
- T Uchihara
- Department of Neuropathology, Tokyo Metropolitan Institute for Neuroscience, Fuchu, Japan.
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Kitaichi N, Kotake S, Mizue Y, Sasamoto Y, Goda C, Iwabuchi K, Onoé K, Matsuda H, Nishihira J. High-dose corticosteroid administration induces increase of serum macrophage migration inhibitory factor in patients with Vogt-Koyanagi-Harada's disease. Microbiol Immunol 2001; 44:1075-7. [PMID: 11220683 DOI: 10.1111/j.1348-0421.2000.tb02606.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: 11/30/2022]
Abstract
To investigate the influence of corticosteroid administration on the serum level of macrophage migration inhibitory factor (MIF), sera obtained from 9 patients with Vogt-Koyanagi-Harada's disease who had been treated with high-dose corticosteroid were analyzed. The serum MIF levels of most patients were prominently increased on day 7 and/or day 14 after corticosteroid treatment. No TNF-alpha was detected in the sera. The average serum MIF level of nine patients at the highest stages after corticosteroid administration was significantly higher than that before the corticosteroid treatment. It seems that MIF is a unique cytokine and acts together with corticosteroid to regulate inflammation and immunity.
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Affiliation(s)
- N Kitaichi
- Department of Ophthalmology and Visual Science, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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44
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Takeda M, Sakai T, Fujisawa Y, Narita M, Iwabuchi K, Loeb MJ. Cockroach midgut peptides that regulate cell proliferation, differentiation, and death in vitro. In Vitro Cell Dev Biol Anim 2001; 37:343-7. [PMID: 11515965 DOI: 10.1007/bf02577568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 11/28/2022]
Abstract
The number of insect midgut cells is maintained homeostatically in vivo and in vitro. However, during starvation, the midgut shrinks and the rate of cell replacement appears to be suppressed. When they undergo metamorphosis, the internal organs of insects are drastically remodeled by cell proliferation, differentiation, and apoptotic processes, and the net number of cells usually increases. An extract of 1650 midguts of Periplaneta americana was fractionated by high-performance liquid chromatography (HPLC) to obtain the peptides that regulate these processes. The HPLC fractions were tested for myotropic activity in the foregut and for effects on cell proliferation or loss in primary cultures of larval Heliothis virescens midgut cells and in a cell line derived from the last-instar larval fat body of Mamestra brassicae. Some fractions stimulated midgut stem cell proliferation and differentiation, while others caused loss of differentiated columnar and goblet cells. Other fractions stimulated cell proliferation in the larval fat body cells.
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Affiliation(s)
- M Takeda
- Graduate School of Science and Technology, Kobe University, Japan.
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45
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Kizaki T, Suzuki K, Hitomi Y, Iwabuchi K, Onoé K, Ishida H, Izawa T, Ji LL, Ohno H, Kizkai T. Activation and apoptosis of murine peritoneal macrophages by acute cold stress. Biochem Biophys Res Commun 2001; 283:700-6. [PMID: 11341782 DOI: 10.1006/bbrc.2001.4843] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Effects of acute cold stress (5 degrees C for 24 h) on the functions of peritoneal macrophages and the mechanisms for controlling host homeostasis were investigated in mice. Phagocytic activity and expression of the cell surface adhesion molecule CD11b/CD18 were markedly increased in peritoneal exudate cells by acute cold stress. These alterations were attributable to an increased number and phenotypical changes of adherent cells from acute cold-stressed mice. On the other hand, a lipopolysaccharide-induced activity of src-family tyrosine kinase Fgr, an expression of interleukin-1beta (IL-1 beta) mRNA, and a bioactivity of IL-1 in the culture supernatants of adherent cells from acute cold-stressed mice were markedly lower than those from control mice. A time course study revealed that the number of adherent cells in peritoneal exudate cells was markedly increased in mice exposed to cold for 24 h but returned to normal numbers when mice were exposed to cold for 72 h. DNA fragmentation and Annexin-V(+) cells were observed in peritoneal exudate cells from acute-cold stressed mice. Thus, cold stress activated macrophages but these macrophages were destined to be eliminated by apoptosis.
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Affiliation(s)
- T Kizaki
- Department of Molecular Predictive Medicine and Sport Science, Kyorin University, School of Medicine, Tokyo, Mitaka, 181-8611, Japan.
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Niino M, Iwabuchi K, Kikuchi S, Ato M, Morohashi T, Ogata A, Tashiro K, Onoé K. Amelioration of experimental autoimmune encephalomyelitis in C57BL/6 mice by an agonist of peroxisome proliferator-activated receptor-gamma. J Neuroimmunol 2001; 116:40-8. [PMID: 11311328 DOI: 10.1016/s0165-5728(01)00285-5] [Citation(s) in RCA: 159] [Impact Index Per Article: 6.9] [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: 10/27/2022]
Abstract
Peroxisome proliferator-activated receptor-gamma (PPAR-gamma), a member of the nuclear hormone receptor superfamily, plays a critical role in adipocyte differentiation and glucose homeostasis. It has been implicated that PPAR-gamma functions as a regulator of cellular proliferation and inflammatory responses. In the present study, we examined whether troglitazone, a selective PPAR-gamma agonists, ameliorated experimental autoimmune encephalomyelitis (EAE) induced by administration of myelin oligodendrocyte glycoprotein (MOG) peptide 35-55 in C57BL/6 mice. We found that troglitazone attenuated the inflammation and decreased the clinical symptoms. It was suggested that the amelioration was attributed to the attenuation of pro-inflammatory cytokine gene expressions.
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Affiliation(s)
- M Niino
- Department of Neurology, Hokkaido University Graduate School of Medicine, Kita-15 Nishi-7, Kita-ku, 060-8638, Sapporo, Japan
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47
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Ishimori N, Iwabuchi K, Fujii S, Watano K, Iwabuchi C, Ato M, Chiba H, Tanaka S, Kitabatake A, Onoé K. Mixed allogeneic chimerism with wild-type strains ameliorates atherosclerosis in apolipoprotein E-deficient mice. J Leukoc Biol 2001; 69:732-40. [PMID: 11358981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023] Open
Abstract
Atherosclerosis involves inflammatory processes between vascular tissues and hematocytes with a hyperlipidemic background. To examine whether variations of hematocytes constitute one of the genetic components in atherosclerosis, irradiated apolipoprotein E (apoE)-deficient (apoE(-/-)) mice with hypercholesterolemia and preexisting atherosclerotic lesions were reconstituted with mixed bone marrow cells (BMC) from syngeneic and wild-type (apoE(+/+); atherosclerosis-resistant SJL or -susceptible B10.S) mice. Stable mixed allogeneic chimeras with small amounts of serum apoE were established without any detrimental complications. Compared with untreated apoE(-/-) mice or apoE(-/-) mice transplanted with syngeneic BMC alone, significant reduction of the cholesterol level and significant lesion regression were observed in the mixed chimeras. Furthermore, mixed chimeras given SJL BMC showed marked reductions in numbers of lesions compared with those reconstituted with B10.S BMC. Cholesterol levels in the former SJL chimeras, however, were significantly higher than those in the latter B10.S chimeras. These findings indicate that the resistance of SJL to atherosclerosis resides in the bone marrow-derived cells.
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Affiliation(s)
- N Ishimori
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, and Department of Cardiovascular Medicine, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
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Abstract
We followed the fate of microcultured Bombyx mori prohemocytes in vitro. Prohemocytes isolated from larval hemolymph (day 1 of 4th instar) were maintained for 4-11 days in serum-free MGM-450 medium and some of them underwent mitotic division. Over 60% of the non-dividing prohemocytes differentiated to plasmatocytes or granulocytes. Some of the granulocytes subsequently transformed to spherulocytes. Of the dividing prohemocytes, 59.2% of the daughter cells differentiated into other types of hemocytes such as plasmatocytes, granulocytes and spherulocytes, and the remainder divided into new prohemocytes. Four of these renewed prohemocytes generated daughter cells composed of plasmatocytes and granulocytes. These results suggest that prohemocytes possess the properties of stem cells, and that plasmatocytes and spherulocytes may be terminally differentiated cells, whereas granulocytes, at least in part, may be a transient form of spherulocyte. Oenocytoids were not produced, suggesting that the lineage of oenocytoids differs from that of other types of hemocytes and that it is determined before release from hemopoietic organs.
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Affiliation(s)
- M Yamashita
- Tokyo University of Agriculture and Technology, Saiwai-cho, Fuchu, 183-8509, Tokyo, Japan
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Iwabuchi K, Iwabuchi C, Tone S, Itoh D, Tosa N, Negishi I, Ogasawara K, Uede T, Onoé K. Defective development of NK1.1+ T-cell antigen receptor alphabeta+ cells in zeta-associated protein 70 null mice with an accumulation of NK1.1+ CD3- NK-like cells in the thymus. Blood 2001; 97:1765-75. [PMID: 11238119 DOI: 10.1182/blood.v97.6.1765] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Development of natural killer 1.1+ (NK1.1+) CD3+ (NK1.1+ T) cells was analyzed in zeta-associated protein 70 (ZAP-70) null ((-/-)) mice. Both NK1.1+ TCRalphabeta+ and NK1.1+ TCRgammadelta+ cell populations were absent in the thymus and spleen. By contrast, the number of NK1.1+ CD3- cells was increased in these tissues. The NK1.1+ CD3- thymocytes in ZAP-70(-/-) mice had surface phenotypes in common with NK or NK1.1+ T cells. However, some of them were discordant either with NK cells or with NK1.1+ T cells. The NK1.1+ CD3- cells produced interferon-gamma upon stimulation with NK1.1 cross-linking in the presence of interleukin-2 and exhibited a substantial cytotoxicity against YAC-1 cells. Moreover, the generation of NK1.1+ T cells with invariant Valpha14Jalpha281 chains was induced from the NK1.1+ CD3- thymocytes following stimulation with phorbol myristate acetate and ionomycin in a neonatal thymic organ culture. An introduction of TCRalpha and beta transgenes to the ZAP-70(-/-) mice resulted in generation of an NK1.1+ TCRalphabeta(dim) population, whereas no substantial CD4+ CD8- or CD4- CD8+ population that expressed the introduced TCRalphabeta was generated in the mainstream T lineage. These findings demonstrate that ZAP-70 kinase is indispensable for the development of NK1.1+ T cells and that the unique NK1.1+ CD3- thymocytes in ZAP-70(-/-) mice contain immediate precursors of NK1.1+ T cells.
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MESH Headings
- Animals
- Antigens/metabolism
- Antigens, Ly
- Antigens, Surface
- CD3 Complex/genetics
- CD3 Complex/metabolism
- Cell Differentiation/drug effects
- Gene Rearrangement/drug effects
- Immunophenotyping
- Ionomycin/pharmacology
- Killer Cells, Natural/cytology
- Killer Cells, Natural/drug effects
- Killer Cells, Natural/immunology
- Lectins, C-Type
- Mice
- Mice, Knockout
- Mice, Transgenic
- NK Cell Lectin-Like Receptor Subfamily B
- Protein-Tyrosine Kinases/genetics
- Protein-Tyrosine Kinases/pharmacology
- Protein-Tyrosine Kinases/physiology
- Proteins/metabolism
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Receptors, Antigen, T-Cell, alpha-beta/metabolism
- Spleen/cytology
- Spleen/immunology
- T-Lymphocytes/cytology
- T-Lymphocytes/drug effects
- T-Lymphocytes/immunology
- Tetradecanoylphorbol Acetate/pharmacology
- Thymus Gland/cytology
- Thymus Gland/immunology
- ZAP-70 Protein-Tyrosine Kinase
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Affiliation(s)
- K Iwabuchi
- Division of Immunobiology and Molecular Immunology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
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Iwabuchi K, Handa K, Hakomori S. Separation of glycosphingolipid-enriched microdomains from caveolar membrane characterized by presence of caveolin. Methods Enzymol 2001; 312:488-94. [PMID: 11070896 DOI: 10.1016/s0076-6879(00)12933-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- K Iwabuchi
- Pacific Northwest Research Institute, Seattle, Washington 98122-4327, USA
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