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Higashi AY, Saito AC, Higashi T, Furuse K, Furuse M, Chiba H, Kazama JJ. Bicellular Localization of Tricellular Junctional Protein Angulin-3/ILDR2 Allows Detection of Podocyte Injury. Am J Pathol 2024; 194:673-683. [PMID: 38311119 DOI: 10.1016/j.ajpath.2024.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 12/19/2023] [Accepted: 01/18/2024] [Indexed: 02/06/2024]
Abstract
Podocytes serve as part of the renal filtration unit with slit diaphragms. Although the structure of slit diaphragms between two cells is well characterized, how the tricellular contact of podocytes is organized and how it changes in injured podocytes remains unknown. This study focused on a tricellular junction protein, angulin-3, and its localization in healthy podocytes, in developmental stages, and in pathologic conditions, using a newly established monoclonal antibody. Angulin-3 was confined at tricellular junctions of primordial podocytes, then transiently localized at bicellular junctions as foot process interdigitation developed and the intercellular junctions rearranged into slit diaphragm, and eventually distributed in a sparse punctate pattern on the foot processes of adult podocytes. In the rodent podocyte injury models, angulin-3 showed bicellular localization between the foot processes, and the localization turned from punctate to dashed linear pattern along the effaced foot processes with the progression of podocyte injury. Angulin-3 also accumulated between foot processes in a linear pattern in kidney biopsy samples of human nephrotic syndrome. Additionally, the line length of angulin-3 staining signal correlated with risk of relapse under glucocorticoid therapy in patients with minimal change nephrotic syndrome. This study proposes an image program to score the linearity of the accumulation pattern of angulin-3 to evaluate the relapse risk of patients with minimal change nephrotic syndrome.
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Affiliation(s)
- Atsuko Y Higashi
- Department of Nephrology and Hypertension, Fukushima Medical University, Fukushima, Japan.
| | - Akira C Saito
- Department of Basic Pathology, Fukushima Medical University, Fukushima, Japan
| | - Tomohito Higashi
- Department of Basic Pathology, Fukushima Medical University, Fukushima, Japan
| | - Kyoko Furuse
- Division of Cell Structure, National Institute for Physiological Sciences, Okazaki, Japan
| | - Mikio Furuse
- Division of Cell Structure, National Institute for Physiological Sciences, Okazaki, Japan; Department of Physiological Sciences, School of Life Science, SOKENDAI (Graduate University for Advanced Studies), Okazaki, Japan
| | - Hideki Chiba
- Department of Basic Pathology, Fukushima Medical University, Fukushima, Japan
| | - Junichiro J Kazama
- Department of Nephrology and Hypertension, Fukushima Medical University, Fukushima, Japan
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2
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Higashi T, Saito AC, Chiba H. Damage control of epithelial barrier function in dynamic environments. Eur J Cell Biol 2024; 103:151410. [PMID: 38579602 DOI: 10.1016/j.ejcb.2024.151410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 03/27/2024] [Accepted: 03/30/2024] [Indexed: 04/07/2024] Open
Abstract
Epithelial tissues cover the surfaces and lumens of the internal organs of multicellular animals and crucially contribute to internal environment homeostasis by delineating distinct compartments within the body. This vital role is known as epithelial barrier function. Epithelial cells are arranged like cobblestones and intricately bind together to form an epithelial sheet that upholds this barrier function. Central to the restriction of solute and fluid diffusion through intercellular spaces are occluding junctions, tight junctions in vertebrates and septate junctions in invertebrates. As part of epithelial tissues, cells undergo constant renewal, with older cells being replaced by new ones. Simultaneously, the epithelial tissue undergoes relative rearrangement, elongating, and shifting directionally as a whole. The movement or shape changes within the epithelial sheet necessitate significant deformation and reconnection of occluding junctions. Recent advancements have shed light on the intricate mechanisms through which epithelial cells sustain their barrier function in dynamic environments. This review aims to introduce these noteworthy findings and discuss some of the questions that remain unanswered.
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Affiliation(s)
- Tomohito Higashi
- Department of Basic Pathology, Fukushima Medical University, Fukushima 960-1295, Japan.
| | - Akira C Saito
- Department of Basic Pathology, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Hideki Chiba
- Department of Basic Pathology, Fukushima Medical University, Fukushima 960-1295, Japan
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3
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Higashi T, Stephenson RE, Schwayer C, Huljev K, Higashi AY, Heisenberg CP, Chiba H, Miller AL. ZnUMBA - a live imaging method to detect local barrier breaches. J Cell Sci 2023; 136:jcs260668. [PMID: 37461809 PMCID: PMC10445723 DOI: 10.1242/jcs.260668] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 07/06/2023] [Indexed: 08/09/2023] Open
Abstract
Epithelial barrier function is commonly analyzed using transepithelial electrical resistance, which measures ion flux across a monolayer, or by adding traceable macromolecules and monitoring their passage across the monolayer. Although these methods measure changes in global barrier function, they lack the sensitivity needed to detect local or transient barrier breaches, and they do not reveal the location of barrier leaks. Therefore, we previously developed a method that we named the zinc-based ultrasensitive microscopic barrier assay (ZnUMBA), which overcomes these limitations, allowing for detection of local tight junction leaks with high spatiotemporal resolution. Here, we present expanded applications for ZnUMBA. ZnUMBA can be used in Xenopus embryos to measure the dynamics of barrier restoration and actin accumulation following laser injury. ZnUMBA can also be effectively utilized in developing zebrafish embryos as well as cultured monolayers of Madin-Darby canine kidney (MDCK) II epithelial cells. ZnUMBA is a powerful and flexible method that, with minimal optimization, can be applied to multiple systems to measure dynamic changes in barrier function with spatiotemporal precision.
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Affiliation(s)
- Tomohito Higashi
- Department of Basic Pathology, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Rachel E. Stephenson
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Cornelia Schwayer
- Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria
| | - Karla Huljev
- Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria
| | - Atsuko Y. Higashi
- Department of Basic Pathology, Fukushima Medical University, Fukushima 960-1295, Japan
- Department of Nephrology and Hypertension, Fukushima Medical University, Fukushima 960-1295, Japan
| | | | - Hideki Chiba
- Department of Basic Pathology, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Ann L. Miller
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
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Kawai A, Iwata S, Shimoi T, Kobayashi E, Ogura K, Yoshida A, Okuma H, Goto Y, Morizane C, Yoshida Y, Katoh Y, Yatabe Y, Yonemori K, Nakamura K, Nishida T, Higashi T. 126P Comprehensive efforts to address multifaceted issues of rare cancers and sarcomas in Japan. ESMO Open 2023. [DOI: 10.1016/j.esmoop.2023.101072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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5
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Saito AC, Higashi T, Chiba H. Tight-junction strand networks and tightness of the epithelial barrier. Microscopy (Oxf) 2023:7008758. [PMID: 36715075 DOI: 10.1093/jmicro/dfad008] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/23/2023] [Accepted: 01/26/2023] [Indexed: 01/31/2023] Open
Abstract
Tight junctions are cell-cell junction structures critical for controlling paracellular permeability. On freeze-fracture replica electron microscopy, they appear as a continuous network of fibrils (tight-junction strands). Tight-junction strands function as zippers that create a physical barrier against paracellular diffusion of molecules. The morphology of the tight-junction strand network varies greatly between tissues and, in recent years, studies have highlighted the mechanisms regulating the morphology of tight-junction strand networks and on their relevance to barrier function. In this review, we discuss evidence regarding the components of the tight-junction strand and the mechanisms for creating the tight-junction strand network. Furthermore, we discuss and hypothesize how its morphology contributes to the establishment of the epithelial barrier.
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Affiliation(s)
- Akira C Saito
- Department of Basic Pathology, Fukushima Medical University, 1 Hikariga-oka, Fukushima 960-1295, Japan
| | - Tomohito Higashi
- Department of Basic Pathology, Fukushima Medical University, 1 Hikariga-oka, Fukushima 960-1295, Japan
| | - Hideki Chiba
- Department of Basic Pathology, Fukushima Medical University, 1 Hikariga-oka, Fukushima 960-1295, Japan
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Higashi T, Saito AC, Fukazawa Y, Furuse M, Higashi AY, Ono M, Chiba H. EpCAM proteolysis and release of complexed claudin-7 repair and maintain the tight junction barrier. J Cell Biol 2022; 222:213688. [PMID: 36378161 PMCID: PMC9671161 DOI: 10.1083/jcb.202204079] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 09/09/2022] [Accepted: 09/28/2022] [Indexed: 11/16/2022] Open
Abstract
TJs maintain the epithelial barrier by regulating paracellular permeability. Since TJs are under dynamically fluctuating intercellular tension, cells must continuously survey and repair any damage. However, the underlying mechanisms allowing cells to sense TJ damage and repair the barrier are not yet fully understood. Here, we showed that proteinases play an important role in the maintenance of the epithelial barrier. At TJ break sites, EpCAM-claudin-7 complexes on the basolateral membrane become accessible to apical membrane-anchored serine proteinases (MASPs) and the MASPs cleave EpCAM. Biochemical data and imaging analysis suggest that claudin-7 released from EpCAM contributes to the rapid repair of damaged TJs. Knockout (KO) of MASPs drastically reduced barrier function and live-imaging of TJ permeability showed that MASPs-KO cells exhibited increased size, duration, and frequency of leaks. Together, our results reveal a novel mechanism of TJ maintenance through the localized proteolysis of EpCAM at TJ leaks, and provide a better understanding of the dynamic regulation of epithelial permeability.
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Affiliation(s)
- Tomohito Higashi
- Department of Basic Pathology, Fukushima Medical University, Fukushima, Japan,Correspondence to Tomohito Higashi:
| | - Akira C. Saito
- Department of Basic Pathology, Fukushima Medical University, Fukushima, Japan
| | - Yugo Fukazawa
- Division of Brain Structure and Function, Faculty of Medical Science, Life Science Innovation Center, University of Fukui, Fukui, Japan
| | - Mikio Furuse
- Division of Cell Structure, National Institute for Physiological Sciences, Okazaki, Aichi, Japan,Department of Physiological Sciences, School of Life Science, SOKENDAI (Graduate University for Advanced Studies), Okazaki, Aichi, Japan
| | - Atsuko Y. Higashi
- Department of Basic Pathology, Fukushima Medical University, Fukushima, Japan
| | - Masahiro Ono
- Department of Basic Pathology, Fukushima Medical University, Fukushima, Japan
| | - Hideki Chiba
- Department of Basic Pathology, Fukushima Medical University, Fukushima, Japan
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7
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Endo Y, Sugimoto K, Kobayashi M, Kobayashi Y, Kojima M, Furukawa S, Soeda S, Watanabe T, Higashi AY, Higashi T, Hashimoto Y, Fujimori K, Chiba H. Claudin‑9 is a novel prognostic biomarker for endometrial cancer. Int J Oncol 2022; 61:135. [PMID: 36129146 PMCID: PMC9521636 DOI: 10.3892/ijo.2022.5425] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 09/02/2022] [Indexed: 11/23/2022] Open
Abstract
The tight-junction protein claudin-9 (CLDN9) is barely distributed in normal adult tissues but is ectopically expressed in various cancer types. Although multiple databases indicated upregulation of CLDN9 in endometrial cancers at the mRNA level, its protein expression and biological roles remain obscure. In the present study, the prognostic significance of CLDN9 expression in endometrial cancer was evaluated by immunohistochemical staining and semi-quantification using formalin-fixed paraffin-embedded specimens obtained from 248 endometrial carcinoma cases. A total of 43 cases (17.3%) had high CLDN9 expression, whereas 205 cases (82.7%) exhibited low CLDN9 expression. The 5-year disease-specific survival rates in the high and low CLDN9 expression groups were 62.8 and 87.8% (P<0.001), respectively. In addition, multivariate analysis revealed that high CLDN9 expression was an independent prognostic factor (hazard ratio, 4.99; 95% CI, 1.96-12.70; P<0.001). Furthermore, CLDN9 expression was significantly correlated with the expression of CLDN6 (P<0.001), which is the closest CLDN member to CLDN9 and a poor prognostic factor for endometrial carcinoma. The 5-year disease-specific survival rate of cases with CLDN6-high/CLDN9-high, CLDN6-high/CLDN9-low and CLDN6-low/CLDN9-high status was 30.0, 37.5 and 72.7%, respectively, whereas that of CLDN6-low/CLDN9-low was 89.8% (P=0.004). In conclusion, aberrant CLDN9 expression is a predictor of poor prognosis for endometrial cancer and may be utilized in combination with CLDN6 to achieve higher sensitivity.
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Affiliation(s)
- Yuta Endo
- Department of Obstetrics and Gynecology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
| | - Kotaro Sugimoto
- Department of Basic Pathology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
| | - Makoto Kobayashi
- Department of Basic Pathology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
| | - Yasuyuki Kobayashi
- Department of Diagnostic Pathology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
| | - Manabu Kojima
- Department of Obstetrics and Gynecology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
| | - Shigenori Furukawa
- Department of Obstetrics and Gynecology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
| | - Shu Soeda
- Department of Obstetrics and Gynecology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
| | - Takafumi Watanabe
- Department of Obstetrics and Gynecology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
| | - Atsuko Y Higashi
- Department of Basic Pathology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
| | - Tomohito Higashi
- Department of Basic Pathology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
| | - Yuko Hashimoto
- Department of Diagnostic Pathology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
| | - Keiya Fujimori
- Department of Obstetrics and Gynecology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
| | - Hideki Chiba
- Department of Basic Pathology, Fukushima Medical University School of Medicine, Fukushima 960‑1295, Japan
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8
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Saito AC, Endo C, Fukazawa Y, Higashi T, Chiba H. Effects of TAMP family on the tight junction strand network and barrier function in epithelial cells. Ann N Y Acad Sci 2022; 1517:234-250. [PMID: 36069127 DOI: 10.1111/nyas.14889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Occludin, tricellulin, and marvelD3 belong to the tight junction (TJ)-associated MARVEL protein family. Occludin and tricellulin jointly contribute to TJ strand branching point formation and epithelial barrier maintenance. However, whether marvelD3 has the same function remains unclear. Furthermore, the roles of the carboxy-terminal cytoplasmic tail, which is conserved in occludin and tricellulin, on the regulation of TJ strand morphology have not yet been explored in epithelial cells. We established tricellulin/occludin/marveld3 triple-gene knockout (tKO) MDCK II cells and evaluated the roles of marvelD3 in the TJ strand structure and barrier function using MDCK II cells and a mathematical model. The complexity of TJ strand networks and paracellular barrier did not change in tKO cells compared to that in tricellulin/occludin double-gene knockout (dKO) cells. Exogenous marvelD3 expression in dKO cells did not increase the complexity of TJ strand networks and epithelial barrier tightness. The expression of the carboxy-terminal truncation mutant of tricellulin restored the barrier function in the dKO cells, whereas occludin lacking the carboxy-terminal cytoplasmic tail was not expressed on the plasma membrane. These data suggest that marvelD3 does not affect the morphology of TJ strands and barrier function in MDCK II cells and that the carboxy-terminal cytoplasmic tail of tricellulin is dispensable for barrier improvement.
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Affiliation(s)
- Akira C Saito
- Department of Basic Pathology, Fukushima Medical University, Fukushima, Japan
| | - Chisato Endo
- Department of Basic Pathology, Fukushima Medical University, Fukushima, Japan
| | - Yugo Fukazawa
- Division of Brain Structure and Function, Faculty of Medical Science, Life Science Innovation Center, University of Fukui, Fukui, Japan
| | - Tomohito Higashi
- Department of Basic Pathology, Fukushima Medical University, Fukushima, Japan
| | - Hideki Chiba
- Department of Basic Pathology, Fukushima Medical University, Fukushima, Japan
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9
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Watanabe M, Higashi T, Ozeki K, Higashi AY, Sugimoto K, Mine H, Takagi H, Ozaki Y, Muto S, Okabe N, Matsumura Y, Hasegawa T, Shio Y, Suzuki H, Chiba H. CLDN15 is a novel diagnostic marker for malignant pleural mesothelioma. Sci Rep 2021; 11:12554. [PMID: 34131154 PMCID: PMC8206149 DOI: 10.1038/s41598-021-91464-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 05/27/2021] [Indexed: 12/18/2022] Open
Abstract
Malignant mesothelioma is a cancer with a poor survival rate. It is difficult to diagnose mesotheliomas because they show a variety of histological patterns similar to those of various other cancers. However, since currently used positive markers for mesotheliomas may show false positives or false negatives, a novel mesothelial positive marker is required. In the present study, we screened 25 claudins and found that claudin-15 is expressed in the mesothelial cells. We made new rat anti-human claudin-15 (CLDN15) monoclonal antibodies that selectively recognize CLDN15, and investigated whether CLDN15 is a good positive marker for malignant pleural mesotheliomas (MPMs) using MPM tissue samples by immunohistochemistry and semi-quantification of the expression level using an immunoreactive score (IRS) method. Of 42 MPM samples, 83% were positive for CLDN15. The positive ratio was equal to or greater than other positive markers for MPMs including calretinin (81%), WT-1 (50%), and D2-40 (81%). In 50 lung adenocarcinoma sections, four cases were positive for CLDN15 and the specificity (92%) was comparable with other markers (90–100%). Notably, CLDN15 was rarely detected in 24 non-mesothelial tumors in the tissue microarray (12/327 cases). In conclusion, CLDN15 can be used in the clinical setting as a positive marker for MPM diagnosis.
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Affiliation(s)
- Masayuki Watanabe
- Department of Chest Surgery, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan.,Department of Basic Pathology, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Tomohito Higashi
- Department of Basic Pathology, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan.
| | - Kana Ozeki
- Department of Basic Pathology, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Atsuko Y Higashi
- Department of Basic Pathology, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Kotaro Sugimoto
- Department of Basic Pathology, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Hayato Mine
- Department of Chest Surgery, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Hironori Takagi
- Department of Chest Surgery, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Yuki Ozaki
- Department of Chest Surgery, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Satoshi Muto
- Department of Chest Surgery, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Naoyuki Okabe
- Department of Chest Surgery, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Yuki Matsumura
- Department of Chest Surgery, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Takeo Hasegawa
- Department of Chest Surgery, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Yutaka Shio
- Department of Chest Surgery, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Hiroyuki Suzuki
- Department of Chest Surgery, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Hideki Chiba
- Department of Basic Pathology, Graduate School of Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan
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10
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Saito AC, Higashi T, Fukazawa Y, Otani T, Tauchi M, Higashi AY, Furuse M, Chiba H. Occludin and tricellulin facilitate formation of anastomosing tight-junction strand network to improve barrier function. Mol Biol Cell 2021; 32:722-738. [PMID: 33566640 PMCID: PMC8108510 DOI: 10.1091/mbc.e20-07-0464] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Tight junctions (TJs) are composed of a claudin-based anastomosing network of TJ strands at which plasma membranes of adjacent epithelial cells are closely attached to regulate the paracellular permeability. Although the TJ proteins occludin and tricellulin have been known to be incorporated in the TJ strand network, their molecular functions remain unknown. Here, we established tricellulin/occludin-double knockout (dKO) MDCK II cells using a genome editing technique and evaluated the structure and barrier function of these cells. In freeze-fracture replica electron microscopy, the TJ strands of tricellulin/occludin-dKO cells had fewer branches and were less anastomosed compared with the controls. The paracellular permeability of ions and small tracers was increased in the dKO cells. A single KO of tricellulin or occludin had limited effects on the morphology and permeability of TJs. Mathematical simulation using a simplified TJ strand network model predicted that reduced cross-links in TJ strands lead to increased permeability of ions and small macromolecules. Furthermore, overexpression of occludin increased the complexity of TJ strand network and strengthened barrier function. Taken together, our data suggest that tricellulin and occludin mediate the formation and/or stabilization of TJ-strand branching points and contribute to the maintenance of epithelial barrier integrity.
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Affiliation(s)
- Akira C Saito
- Department of Basic Pathology, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Tomohito Higashi
- Department of Basic Pathology, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Yugo Fukazawa
- Division of Brain Structure and Function, Research Center for Child Mental Development, School of Medical Science, University of Fukui, Fukui 910-1193, Japan
| | - Tetsuhisa Otani
- Division of Cell Structure, National Institute for Physiological Sciences, Okazaki, Aichi 444-8787, Japan.,Department of Physiological Sciences, School of Life Science, SOKENDAI (Graduate University for Advanced Studies), Okazaki, Aichi 444-8585, Japan
| | - Masashi Tauchi
- Department of Basic Pathology, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Atsuko Y Higashi
- Department of Basic Pathology, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Mikio Furuse
- Division of Cell Structure, National Institute for Physiological Sciences, Okazaki, Aichi 444-8787, Japan.,Department of Physiological Sciences, School of Life Science, SOKENDAI (Graduate University for Advanced Studies), Okazaki, Aichi 444-8585, Japan
| | - Hideki Chiba
- Department of Basic Pathology, Fukushima Medical University, Fukushima 960-1295, Japan
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11
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Oda Y, Sugawara T, Fukata Y, Izumi Y, Otani T, Higashi T, Fukata M, Furuse M. The extracellular domain of angulin-1 and palmitoylation of its cytoplasmic region are required for angulin-1 assembly at tricellular contacts. J Biol Chem 2020; 295:4289-4302. [PMID: 32079676 PMCID: PMC7105312 DOI: 10.1074/jbc.ra119.010491] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 02/13/2020] [Indexed: 12/13/2022] Open
Abstract
Tricellular tight junctions (tTJs) create paracellular barriers at tricellular contacts (TCs), where the vertices of three polygonal epithelial cells meet. tTJs are marked by the enrichment of two types of membrane proteins, tricellulin and angulin family proteins. However, how TC geometry is recognized for tTJ formation remains unknown. In the present study, we examined the molecular mechanism for the assembly of angulin-1 at the TCs. We found that clusters of cysteine residues in the juxtamembrane region within the cytoplasmic domain of angulin-1 are highly palmitoylated. Mutagenesis analyses of the cysteine residues in this region revealed that palmitoylation is essential for localization of angulin-1 at TCs. Consistently, suppression of Asp-His-His-Cys motif-containing palmitoyltransferases expressed in EpH4 cells significantly impaired the TC localization of angulin-1. Cholesterol depletion from the plasma membrane of cultured epithelial cells hampered the localization of angulin-1 at TCs, suggesting the existence of a lipid membrane microdomain at TCs that attracts highly palmitoylated angulin-1. Furthermore, the extracellular domain of angulin-1 was also required for its TC localization, irrespective of the intracellular palmitoylation. Taken together, our findings suggest that both angulin-1's extracellular domain and palmitoylation of its cytoplasmic region are required for its assembly at TCs.
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Affiliation(s)
- Yukako Oda
- Division of Cell Biology, Graduate School of Medicine, Kobe University, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan
| | - Taichi Sugawara
- Division of Cell Structure, National Institute for Physiological Sciences, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan; Department of Physiological Sciences, School of Life Science, Graduate University for Advanced Studies, SOKENDAI, 38 Nishigonaka Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Yuko Fukata
- Department of Physiological Sciences, School of Life Science, Graduate University for Advanced Studies, SOKENDAI, 38 Nishigonaka Myodaiji, Okazaki, Aichi 444-8585, Japan; Division of Membrane Physiology, National Institute for Physiological Sciences, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Yasushi Izumi
- Division of Cell Structure, National Institute for Physiological Sciences, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan; Department of Physiological Sciences, School of Life Science, Graduate University for Advanced Studies, SOKENDAI, 38 Nishigonaka Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Tetsuhisa Otani
- Division of Cell Structure, National Institute for Physiological Sciences, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan; Department of Physiological Sciences, School of Life Science, Graduate University for Advanced Studies, SOKENDAI, 38 Nishigonaka Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Tomohito Higashi
- Division of Cell Biology, Graduate School of Medicine, Kobe University, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan
| | - Masaki Fukata
- Department of Physiological Sciences, School of Life Science, Graduate University for Advanced Studies, SOKENDAI, 38 Nishigonaka Myodaiji, Okazaki, Aichi 444-8585, Japan; Division of Membrane Physiology, National Institute for Physiological Sciences, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Mikio Furuse
- Division of Cell Biology, Graduate School of Medicine, Kobe University, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan; Division of Cell Structure, National Institute for Physiological Sciences, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan; Department of Physiological Sciences, School of Life Science, Graduate University for Advanced Studies, SOKENDAI, 38 Nishigonaka Myodaiji, Okazaki, Aichi 444-8585, Japan.
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12
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Tokunaga R, Nakagawa S, Miyamoto Y, Ohuchi M, Izumi D, Kosumi K, Taki K, Higashi T, Miyata T, Yoshida N, Baba H. The clinical impact of preoperative body composition differs between male and female colorectal cancer patients. Colorectal Dis 2020; 22:62-70. [PMID: 31344314 DOI: 10.1111/codi.14793] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 07/15/2019] [Indexed: 12/18/2022]
Abstract
AIM Patient body composition is an important indicator of metabolic status and is associated with cancer progression. Because body composition varies between men and women, we aimed to examine the difference in clinical impact of preoperative body composition according to sex. METHOD We used an integrated dataset of 559 colorectal cancer (CRC) patients. The association between preoperative body composition indices [body mass index (BMI), visceral to subcutaneous fat area ratio (VSR) and skeletal muscle index (SMI)] and patient outcome, clinicopathological factors and preoperative inflammation and nutritional status was analysed, comparing men and women. RESULTS Preoperative low BMI and low SMI in men was significantly associated with unfavourable overall survival (OS) [BMI: hazard ratio (HR) 2.22, 95% CI 1.28-4.14, P = 0.004; SMI: HR 2.54, 95% CI 1.61-4.07, P < 0.001] and high VSR in women was significantly associated with unfavourable OS (HR 1.79, 95% CI 1.03-3.02, P = 0.040). Additionally, low SMI in men was significantly associated with deeper tumour invasion and greater distant metastasis and high VSR in women was significantly associated with advanced age, right-sided tumour, lower total lymphocyte count and lower albumin levels. Interestingly, low BMI in men was significantly associated with deeper tumour invasion, but also with favourable inflammation and nutritional status (lower C-reactive protein and higher albumin). CONCLUSION The clinical impact of preoperative body composition differed between men and women: SMI in men and VSR in women were good prognosticators. Our findings may provide a novel insight for CRC treatment strategies.
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Affiliation(s)
- R Tokunaga
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - S Nakagawa
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Y Miyamoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - M Ohuchi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - D Izumi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - K Kosumi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - K Taki
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Miyata
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - N Yoshida
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
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13
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Sugimoto K, Ichikawa-Tomikawa N, Kashiwagi K, Endo C, Tanaka S, Sawada N, Watabe T, Higashi T, Chiba H. Cell adhesion signals regulate the nuclear receptor activity. Proc Natl Acad Sci U S A 2019; 116:24600-24609. [PMID: 31740618 PMCID: PMC6900646 DOI: 10.1073/pnas.1913346116] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Cell adhesion is essential for proper tissue architecture and function in multicellular organisms. Cell adhesion molecules not only maintain tissue integrity but also possess signaling properties that contribute to diverse cellular events such as cell growth, survival, differentiation, polarity, and migration; however, the underlying molecular basis remains poorly defined. Here we identify that the cell adhesion signal initiated by the tight-junction protein claudin-6 (CLDN6) regulates nuclear receptor activity. We show that CLDN6 recruits and activates Src-family kinases (SFKs) in second extracellular domain-dependent and Y196/200-dependent manners, and SFKs in turn phosphorylate CLDN6 at Y196/200. We demonstrate that the CLDN6/SFK/PI3K/AKT axis targets the AKT phosphorylation sites in the retinoic acid receptor γ (RARγ) and the estrogen receptor α (ERα) and stimulates their activities. Interestingly, these phosphorylation motifs are conserved in 14 of 48 members of human nuclear receptors. We propose that a similar link between diverse cell adhesion and nuclear receptor signalings coordinates a wide variety of physiological and pathological processes.
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Affiliation(s)
- Kotaro Sugimoto
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan
| | - Naoki Ichikawa-Tomikawa
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan
| | - Korehito Kashiwagi
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan
| | - Chihiro Endo
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan
| | - Satoshi Tanaka
- Department of Pathology, Sapporo Medical University School of Medicine, 060-8556 Sapporo, Japan
| | - Norimasa Sawada
- Department of Pathology, Sapporo Medical University School of Medicine, 060-8556 Sapporo, Japan
| | - Tetsuya Watabe
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan
| | - Tomohito Higashi
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan
| | - Hideki Chiba
- Department of Basic Pathology, Fukushima Medical University School of Medicine, 960-1295 Fukushima, Japan;
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14
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Nishina Y, Niino M, Higashi T. Approach for Compensation System of Asbestos-Related Lung Cancer. Eur J Public Health 2019. [DOI: 10.1093/eurpub/ckz186.321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
The health hazards of asbestos have been globally recognized, especially those among industrial workers with long-term exposure. Lung cancer is one such asbestos-related disease. It occurs not only among workers but also among residents with environmental exposure to asbestos. Patients with work-related exposure can receive occupational compensation, and patients with non-occupational exposure are supported by a separate compensation system in Japan. However, the latter is not well-known among clinicians, and a substantial number of patients may have been left out. We need an effective way to find patients eligible to receive benefits by better understanding the clinical conditions that characterize patients with asbestos-related lung cancer.
Methods
We conducted two types of research: 1. Comparison of clinical characteristics between compensation system recipients (N = 65) and general lung cancer patients diagnosed in 2015, using Japan’s National Database of Hospital-Based Cancer Registry.
2. Estimation of the frequency of pleural plaques among lung cancer patients by double-checking CT scan images of a random sample of lung cancer patients obtained from the HBCR national database (N = 3585).
Results
Patients with squamous cell carcinoma are twice as likely asbestos-induced as patients with other histology overall after adjusting for age, sex and cancer stages, but not smoking status and history. As many as 20% of the CT images were read inconsistently between two radiologists or respiratory disease doctors and we could not obtain the accurate rate of candidacy for the compensation system.
Conclusions
We require more accurate information about pathological characteristics by controlling for smoking status and history among compensation recipients. For radiologic interpretation, more effective education is needed for the radiologists and respiratory disease doctors who treat lung cancer patients.
Key messages
Specific information about asbestos-related lung cancer would lead clinicians to correctly identify asbestos-related lung cancer. Educational system for clinicians would help patients to receive the benefit of compensation.
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Affiliation(s)
- Y Nishina
- Division of Health Services Research, National Cancer Center Japan, Tokyo, Japan
- Health Division, Employment, Labour and Social Affairs, Organisation for Economic Co-operation and Development, Paris, France
| | - M Niino
- Division of Health Services Research, National Cancer Center Japan, Tokyo, Japan
| | - T Higashi
- Division of Health Services Research, National Cancer Center Japan, Tokyo, Japan
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15
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Watanabe M, Higashi T, Mine H, Takagi H, Ozaki Y, Muto S, Okabe N, Hasegawa T, Shio Y, Sugimoto K, Chiba H, Suzuki H. P2.06-20 Characterization of Claudin15 as a New Diagnostic Marker for Malignant Pleural Mesotheliomas. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Uno LH, de Paula MP, Iwasa S, Falzoni W, Tanaka M, Alves L, Barros F, Higashi T, Ribeiro L. Neuroacustica®'s Sound Stimulation Effects over Neurotransmitters, Cortisol, P-Amyloid (1-42), Thromboxane B2 and Telomere, on Cerebral Pons Representative Area, on the back of the head, and other Abnormal Body Locations, Using Bi-Digital O-Ring Test. ACUPUNCTURE ELECTRO 2019. [DOI: 10.3727/036012919x15675460598319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Thirty patients with marked depletion of neurotransmitters concentrations were noninvasively evaluated by Bi-Digital O-Ring Test (an electro-magnetic field (EMF) resonance phenomenon between two identical substances and amount1 ,2,3).
Reference Control Substances (RCS) of Serotonin, Acetylcholine, Dopamine, Cortisol, ~-Amyloid, Thromboxane B2, and Telomere were measured over cerebral pons representative area and any other abnormal region presented, before and after submitted to Neuroacustica® (a 60 minutes sound treatment).
The results are as follow.
The average Serotonin on cerebral pons was 1.25 before and 150.33 mcg after (p<0.001*), on abnormal area was 12.91 before and 142.73 mcg after (p=0.003*).
The average Acetylcholine on cerebral pons was 8.07 before and 1421.17 mcg after (p<0.001*), on abnormal area was 46.46 before and 1181.82 mcg after (p=0.003*).
The average Dopamine on cerebral pons was 2.23 before and 156.20 mcg after (p<0.001*), on abnormal area was 8.06 before and 158.09 mcg after (p=0.003*).
The average Thromboxane on cerebral pons was 217.80 before and 12.04 ng after (p<0.001*), on abnormal area was 390.00 before and 18.02 ng after (p=0.003*).
The average ~-Amyloid on cerebral pons was 17.33 before and 4.30 ng after (p=0.001*), on abnormal area was 10.78 before and 4.86 ng after (p=0.128).
The average Cortisol on cerebral pons was 1353.23 before and 59.74 ng after (p<0.001*), on abnormal area was 1037.83 before and 23.82 ng after (p=0.033*).
The average Telomere on cerebral pons was 46.08 before and 375.18 ng after (p<0.001*), on abnormal area was 56.50 before and 446.25 ng after (p=0.012*).
The average Normal Cell Telomere was 197.49 before and 473.52 ng after (p<0.001*).
Extra five patients in the same conditions (low levels of cerebral neurotransmitters) were submitted to the same procedure, and this time for a 24 hours follow up.
In conclusion, hearing Neuroacustica® - Part 1, once, had favorable physiological effects, increasing sufficiently normal cell Telomere, Serotonin, Acetylcholine, Dopamine; as well as decreasing satisfactorily Thromboxan B2, Cortisol, ~-Amyloid and Cancer Cell Telomere both in cerebral pons and on abnormal area.
The effects may last in about 24 hours.
The exposition to EMF, some sort of food and alcohol may cancel it's benefits.
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17
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Arnold TR, Shawky JH, Stephenson RE, Dinshaw KM, Higashi T, Huq F, Davidson LA, Miller AL. Anillin regulates epithelial cell mechanics by structuring the medial-apical actomyosin network. eLife 2019; 8:39065. [PMID: 30702429 PMCID: PMC6424563 DOI: 10.7554/elife.39065] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Accepted: 01/30/2019] [Indexed: 02/07/2023] Open
Abstract
Cellular forces sculpt organisms during development, while misregulation of cellular mechanics can promote disease. Here, we investigate how the actomyosin scaffold protein anillin contributes to epithelial mechanics in Xenopus laevis embryos. Increased mechanosensitive recruitment of vinculin to cell-cell junctions when anillin is overexpressed suggested that anillin promotes junctional tension. However, junctional laser ablation unexpectedly showed that junctions recoil faster when anillin is depleted and slower when anillin is overexpressed. Unifying these findings, we demonstrate that anillin regulates medial-apical actomyosin. Medial-apical laser ablation supports the conclusion that that tensile forces are stored across the apical surface of epithelial cells, and anillin promotes the tensile forces stored in this network. Finally, we show that anillin's effects on cellular mechanics impact tissue-wide mechanics. These results reveal anillin as a key regulator of epithelial mechanics and lay the groundwork for future studies on how anillin may contribute to mechanical events in development and disease.
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Affiliation(s)
- Torey R Arnold
- Department of Molecular Cellular and Developmental Biology, University of Michigan, Ann Arbor, United States
| | - Joseph H Shawky
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, United States.,Department of Developmental Biology, University of Pittsburgh, Pittsburgh, United States.,Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, United States
| | - Rachel E Stephenson
- Department of Molecular Cellular and Developmental Biology, University of Michigan, Ann Arbor, United States
| | - Kayla M Dinshaw
- Department of Molecular Cellular and Developmental Biology, University of Michigan, Ann Arbor, United States
| | - Tomohito Higashi
- Department of Molecular Cellular and Developmental Biology, University of Michigan, Ann Arbor, United States
| | - Farah Huq
- Department of Molecular Cellular and Developmental Biology, University of Michigan, Ann Arbor, United States
| | - Lance A Davidson
- Department of Developmental Biology, University of Pittsburgh, Pittsburgh, United States.,Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, United States
| | - Ann L Miller
- Department of Molecular Cellular and Developmental Biology, University of Michigan, Ann Arbor, United States
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18
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Tokunaga R, Nakagawa S, Miyamoto Y, Ohuchi M, Izumi D, Kosumi K, Taki K, Higashi T, Miyata T, Yoshida N, Baba H. The impact of preoperative anaemia and anaemic subtype on patient outcome in colorectal cancer. Colorectal Dis 2019; 21:100-109. [PMID: 30230148 DOI: 10.1111/codi.14425] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 08/13/2018] [Indexed: 12/15/2022]
Abstract
AIM Preoperative anaemia is associated with adverse outcomes in colorectal cancer (CRC). To clarify the reason for this we aimed to comprehensively assess the association of preoperative anaemia with tumour characteristics, host systemic inflammation and nutrition status, and perioperative blood transfusion. METHOD We used an integrated database of 592 CRC patients. The association of preoperative anaemic subtype, calculated from haemoglobin and erythrocyte mean corpuscular volume levels, with patient outcome, preoperative serum data relating to systemic inflammation and nutrition and perioperative blood transfusion was analysed. RESULTS Preoperative anaemia was significantly associated with poorer overall survival and relapse-free survival (RFS); in particular microcytic anaemia had a trend to poorer RFS than other forms of anaemia (P = 0.0648). In addition, preoperative anaemia was significantly correlated with right-sided tumours, greater depth of tumour invasion, use of neoadjuvant chemotherapy, poorer prognostic nutritional index and higher modified Glasgow Prognostic Score (mGPS). Microcytic anaemia in particular had a strong association with a greater depth of tumour invasion (P = 0.0072) and higher mGPS (P = 0.0058) than other causes of anaemia. Perioperative blood transfusion for CRC patients with anaemia was associated with adverse outcomes. CONCLUSIONS Preoperative anaemia, especially microcytic anaemia, was associated with poor patient outcomes, possibly due to poor systemic inflammatory and nutritional status, and it was not improved by perioperative blood transfusion. Our data suggest that preoperative anaemia and the anaemic subtype may serve as an easily available predictor of outcome in CRC.
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Affiliation(s)
- R Tokunaga
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - S Nakagawa
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Y Miyamoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - M Ohuchi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - D Izumi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - K Kosumi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - K Taki
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Miyata
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - N Yoshida
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
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19
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Yazaki S, Yamauchi T, Higashi T. The rate of hepatitis B virus screening before systemic anticancer therapy among patients in Japan. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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20
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Abstract
Reorganization of the actin cytoskeleton is crucial for cellular processes, including cytokinesis and cell–cell junction remodeling. Formins are conserved processive actin-polymerizing machines that regulate actin dynamics by nucleating, elongating, and bundling linear actin filaments. Because the formin family is large, with at least 15 members in vertebrates, there have not been any comprehensive studies examining formin localization and function within a common cell type. Here, we characterized the localization of all 15 formins in epithelial cells of Xenopus laevis gastrula-stage embryos. Dia1 and Dia2 localized to tight junctions, while Fhod1 and Fhod3 localized to adherens junctions. Only Dia3 strongly localized at the cytokinetic contractile ring. The Diaphanous inhibitory domain–dimerization domain (DID-DD) region of Dia1 was sufficient for Dia1 localization, and overexpression of a Dia1 DID-DD fragment competitively removed Dia1 and Dia2 from cell–cell junctions. In Dia1 DID-DD–overexpressing cells, Dia1 and Dia2 were mislocalized to the contractile ring, and cells exhibited increased cytokinesis failure. This work provides a comprehensive analysis of the localization of all 15 vertebrate formins in epithelial cells and suggests that misregulated formin localization results in epithelial cytokinesis failure.
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Affiliation(s)
- Tomohito Higashi
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
| | - Rachel E Stephenson
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
| | - Ann L Miller
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
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21
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Mai Y, Ujiie H, Higashi T, Yamagami J, Iwata H, Shimizu H. Autoantibodies undetectable by chemiluminescent enzyme immunoassay require extended antigen-antibody reaction time for detection. Br J Dermatol 2018; 180:215-216. [PMID: 30171687 DOI: 10.1111/bjd.17121] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Y Mai
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Kita-ku, Sapporo, 060-8638, Japan
| | - H Ujiie
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Kita-ku, Sapporo, 060-8638, Japan
| | - T Higashi
- Department of Cellular Pharmacology, Hokkaido University Graduate School of Medicine, North 15 West 7, Kita-ku, Sapporo, 060-8638, Japan
| | - J Yamagami
- Department of Dermatology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - H Iwata
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Kita-ku, Sapporo, 060-8638, Japan
| | - H Shimizu
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Kita-ku, Sapporo, 060-8638, Japan
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22
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Higashi T, Miller AL. Tricellular junctions: how to build junctions at the TRICkiest points of epithelial cells. Mol Biol Cell 2017; 28:2023-2034. [PMID: 28705832 PMCID: PMC5509417 DOI: 10.1091/mbc.e16-10-0697] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 05/05/2017] [Accepted: 05/10/2017] [Indexed: 01/07/2023] Open
Abstract
Tricellular contacts are the places where three cells meet. In vertebrate epithelial cells, specialized structures called tricellular tight junctions (tTJs) and tricellular adherens junctions (tAJs) have been identified. tTJs are important for the maintenance of barrier function, and disruption of tTJ proteins contributes to familial deafness. tAJs have recently been attracting the attention of mechanobiologists because these sites are hot spots of epithelial tension. Although the molecular components, regulation, and function of tTJs and tAJs, as well as of invertebrate tricellular junctions, are beginning to be characterized, many questions remain. Here we broadly cover what is known about tricellular junctions, propose a new model for tension transmission at tAJs, and discuss key open questions.
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Affiliation(s)
- Tomohito Higashi
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
| | - Ann L Miller
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
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23
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Yamauchi H, Kagawa S, Kishibe Y, Takahashi M, Higashi T. Progressive Cortical Neuronal Damage and Extracranial-Intracranial Bypass Surgery in Patients with Misery Perfusion. AJNR Am J Neuroradiol 2017; 38:935-941. [PMID: 28255031 DOI: 10.3174/ajnr.a5110] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 12/17/2016] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Misery perfusion may cause selective neuronal damage in atherosclerotic ICA or MCA disease. Bypass surgery can improve misery perfusion and may prevent neuronal damage. On the other hand, surgery conveys a risk for neuronal damage. The purpose of this retrospective study was to determine whether progression of cortical neuronal damage in surgically treated patients with misery perfusion is larger than that in surgically treated patients without misery perfusion or medically treated patients with misery perfusion. MATERIALS AND METHODS We evaluated the distribution of benzodiazepine receptors twice by using PET and 11C-labeled flumazenil in 18 surgically treated patients with atherosclerotic ICA or MCA disease (9 with misery perfusion and 9 without) and no perioperative stroke before and after bypass surgery; in 8 medically treated patients with misery perfusion and no intervening ischemic event; and in 7 healthy controls. We quantified abnormal decreases in the benzodiazepine receptors of the cerebral cortex within the MCA distribution and compared changes in the benzodiazepine receptor index among the 3 groups. RESULTS The change in the benzodiazepine receptor index in surgically treated patients with misery perfusion (27.5 ± 15.6) during 7 ± 5 months was significantly larger than that in surgically treated patients without misery perfusion (-5.2 ± 9.4) during 6 ± 4 months (P < .001) and in medically treated patients with misery perfusion (3.2 ± 15.4) during 16 ± 6 months (P < .01). CONCLUSIONS Progression of cortical neuronal damage in surgically treated patients with misery perfusion and no perioperative stroke may occur and may be larger than that in medically treated patients with misery perfusion and no intervening ischemic event.
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Affiliation(s)
- H Yamauchi
- From the Division of PET Imaging (H.Y., S.K., Y.K., M.T., T.H.), Shiga Medical Center Research Institute, Moriyama, Japan
| | - S Kagawa
- From the Division of PET Imaging (H.Y., S.K., Y.K., M.T., T.H.), Shiga Medical Center Research Institute, Moriyama, Japan
| | - Y Kishibe
- From the Division of PET Imaging (H.Y., S.K., Y.K., M.T., T.H.), Shiga Medical Center Research Institute, Moriyama, Japan
| | - M Takahashi
- From the Division of PET Imaging (H.Y., S.K., Y.K., M.T., T.H.), Shiga Medical Center Research Institute, Moriyama, Japan
| | - T Higashi
- From the Division of PET Imaging (H.Y., S.K., Y.K., M.T., T.H.), Shiga Medical Center Research Institute, Moriyama, Japan.,National Institute of Radiological Sciences (T.H.), National Institutes of Quantum and Radiological Science and Technology, Chiba, Japan
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Wakai E, Kanemura T, Kondo H, Hirakawa Y, Ito Y, Serizawa H, Kawahito Y, Higashi T, Suzuki A, Fukada S, Furuya K, Esaki K, Yagi J, Tsuji Y, Ito T, Niitsuma S, Yoshihashi-Suzuki S, Watanabe K, Furukawa T, Groeschel F, Micciche G, Manorri S, Favuzza P, Nitti F, Heidinger R, Terai T, Horiike H, Sugimoto M, Ohira S, Knaster J. Engineering validation for lithium target facility of the IFMIF under IFMIF/EVEDA project. Nuclear Materials and Energy 2016. [DOI: 10.1016/j.nme.2016.05.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Yamaguchi M, Takeda K, Onishi M, Deguchi M, Higashi T. Non-verbal Communication Method Based on a Biochemical Marker for People with Severe Motor and Intellectual Disabilities. J Int Med Res 2016; 34:30-41. [PMID: 16604821 DOI: 10.1177/147323000603400104] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This study evaluated a novel non-verbal communication method for people with severe motor and intellectual disabilities (SMID) based on a biochemical marker, salivary amylase. The physical and psychological status of 10 people with SMID was quantitatively evaluated using a hand-held salivary amylase activity monitor. Each patient needed daily gastric and/or bronchial tube exchanges and these medical procedures were thought to cause severe distress and pain. Salivary amylase activity and heart rate were simultaneously measured during 32 medical procedures. The medical procedures resulted in a significant mean increase for individuals of 70% in salivary amylase activity. The increase in salivary amylase activity was more than four-fold that observed for heart rate. The structural equation modelling analysis also demonstrated a significant correlation between pain and salivary amylase activity. Our data indicate that salivary amylase activity might be used as a non-verbal method of assessing pain in people with SMID.
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Affiliation(s)
- M Yamaguchi
- Faculty of Engineering, University of Toyama, Toyama, Japan.
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Favuzza P, Antonelli A, Furukawa T, Groeschel F, Hedinger R, Higashi T, Hirakawa Y, Iijima M, Ito Y, Kanemura T, Knaster J, Kondo H, Miccichè G, Nitti F, Ohira S, Severi M, Sugimoto M, Suzuki A, Traversi R, Wakai E. Round Robin test for the determination of nitrogen concentration in solid Lithium. Fusion Engineering and Design 2016. [DOI: 10.1016/j.fusengdes.2016.03.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lavine SD, Cockroft K, Hoh B, Bambakidis N, Khalessi AA, Woo H, Riina H, Siddiqui A, Hirsch JA, Chong W, Rice H, Wenderoth J, Mitchell P, Coulthard A, Signh TJ, Phatorous C, Khangure M, Klurfan P, terBrugge K, Iancu D, Gunnarsson T, Jansen O, Muto M, Szikora I, Pierot L, Brouwer P, Gralla J, Renowden S, Andersson T, Fiehler J, Turjman F, White P, Januel AC, Spelle L, Kulcsar Z, Chapot R, Spelle L, Biondi A, Dima S, Taschner C, Szajner M, Krajina A, Sakai N, Matsumaru Y, Yoshimura S, Ezura M, Fujinaka T, Iihara K, Ishii A, Higashi T, Hirohata M, Hyodo A, Ito Y, Kawanishi M, Kiyosue H, Kobayashi E, Kobayashi S, Kuwayama N, Matsumoto Y, Miyachi S, Murayama Y, Nagata I, Nakahara I, Nemoto S, Niimi Y, Oishi H, Satomi J, Satow T, Sugiu K, Tanaka M, Terada T, Yamagami H, Diaz O, Lylyk P, Jayaraman MV, Patsalides A, Gandhi CD, Lee SK, Abruzzo T, Albani B, Ansari SA, Arthur AS, Baxter BW, Bulsara KR, Chen M, Delgado Almandoz JE, Fraser JF, Heck DV, Hetts SW, Hussain MS, Klucznik RP, Leslie-Mawzi TM, Mack WJ, McTaggart RA, Meyers PM, Mocco J, Prestigiacomo CJ, Pride GL, Rasmussen PA, Starke RM, Sunenshine PJ, Tarr RW, Frei DF, Ribo M, Nogueira RG, Zaidat OO, Jovin T, Linfante I, Yavagal D, Liebeskind D, Novakovic R, Pongpech S, Rodesch G, Soderman M, terBrugge K, Taylor A, Krings T, Orbach D, Biondi A, Picard L, Suh DC, Tanaka M, Zhang HQ. Training Guidelines for Endovascular Ischemic Stroke Intervention: An International Multi-Society Consensus Document. AJNR Am J Neuroradiol 2016; 37:E31-4. [PMID: 26892982 DOI: 10.3174/ajnr.a4766] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Daitoku N, Okabe H, Hashimoto D, Chikamoto A, Hayashi H, Nitta H, Taki K, Higashi T, Kaida T, Arima K, Ishiko T, Beppu T, Baba H. Education and Imaging. Hepatobiliary and Pancreatic: Replaced common hepatic artery on left gastric artery: a rare anomaly and implication for pancreaticoduodenectomy. J Gastroenterol Hepatol 2015; 30:1695. [PMID: 26768946 DOI: 10.1111/jgh.12968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- N Daitoku
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Okabe
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Hayashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Taki
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Kaida
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Arima
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Ishiko
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Beppu
- Department of Multidisciplinary Treatment for Gastroenterological Cancer, Kumamoto University Hospital, Kumamoto, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
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Matsuda N, Higashi T, Umino H, Makishi G, Hinoshita T, Yoshida T, Nakahara K, Shioya Y, Nishikimi M, Aoyama Y, Numaguchi A. Analysis of early goal-directed enteral nutrition in nagoya university emergency ICU. Intensive Care Med Exp 2015. [PMCID: PMC4796170 DOI: 10.1186/2197-425x-3-s1-a183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Tsukada Y, Nakamura F, Iwamoto M, Terahara A, Higashi T. Treatment Patterns for T4 Stage III Esophageal Cancer in Japan: Analysis From 233 Designated Cancer Care Hospitals. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Okabe H, Hashimoto D, Chikamoto A, Hayashi H, Nitta H, Taki K, Higashi T, Arima K, Ishiko T, Beppu T, Baba H. Hepatobiliary and Pancreatic: Skin metastases from cholangiocarcinoma mimicking herpes zoster. J Gastroenterol Hepatol 2015. [PMID: 26211694 DOI: 10.1111/jgh.12964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- H Okabe
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Hayashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Taki
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Arima
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Ishiko
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Beppu
- Department of Multidisciplinary Treatment for Gastroenterological Cancer, Kumamoto University Hospital, Kumamoto, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
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Arima K, Chikamoto A, Hashimoto D, Kaida T, Higashi T, Taki K, Takeyama H, Okabe H, Nitta H, Hayashi H, Beppu T, Baba H. Education and Imaging. Hepatology: Hepatocellular carcinoma with duodenal metastasis. J Gastroenterol Hepatol 2015; 30:1115. [PMID: 26094663 DOI: 10.1111/jgh.12868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- K Arima
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Kaida
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - K Taki
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Takeyama
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Okabe
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Hayashi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Beppu
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
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Breznau EB, Semack AC, Higashi T, Miller AL. MgcRacGAP restricts active RhoA at the cytokinetic furrow and both RhoA and Rac1 at cell-cell junctions in epithelial cells. Mol Biol Cell 2015; 26:2439-55. [PMID: 25947135 PMCID: PMC4571299 DOI: 10.1091/mbc.e14-11-1553] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 04/30/2015] [Indexed: 12/17/2022] Open
Abstract
MgcRacGAP's role in regulating the spatiotemporal dynamics of active RhoA and Rac1 in epithelial cells is investigated. MgcRacGAP's GAP activity down-regulates RhoA at the furrow and both RhoA and Rac1 at cell–cell junctions in dividing epithelial cells and is required for successful cytokinesis and cell–cell junction structure. MgcRacGAP's ability to regulate adherens junctions is dependent on GAP activity and signaling via the RhoA pathway. Localized activation of Rho GTPases is essential for multiple cellular functions, including cytokinesis and formation and maintenance of cell–cell junctions. Although MgcRacGAP (Mgc) is required for spatially confined RhoA-GTP at the equatorial cortex of dividing cells, both the target specificity of Mgc's GAP activity and the involvement of phosphorylation of Mgc at Ser-386 are controversial. In addition, Mgc's function at cell–cell junctions remains unclear. Here, using gastrula-stage Xenopus laevis embryos as a model system, we examine Mgc's role in regulating localized RhoA-GTP and Rac1-GTP in the intact vertebrate epithelium. We show that Mgc's GAP activity spatially restricts accumulation of both RhoA-GTP and Rac1-GTP in epithelial cells—RhoA at the cleavage furrow and RhoA and Rac1 at cell–cell junctions. Phosphorylation at Ser-386 does not switch the specificity of Mgc's GAP activity and is not required for successful cytokinesis. Furthermore, Mgc regulates adherens junction but not tight junction structure, and the ability to regulate adherens junctions is dependent on GAP activity and signaling via the RhoA pathway. Together these results indicate that Mgc's GAP activity down-regulates the active populations of RhoA and Rac1 at localized regions of epithelial cells and is necessary for successful cytokinesis and cell–cell junction structure.
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Affiliation(s)
- Elaina B Breznau
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI 48109
| | - Ansley C Semack
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
| | - Tomohito Higashi
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
| | - Ann L Miller
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI 48109 Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
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Horiuchi S, Higashi T, Ikeda K, Saishoji T, Jinnouchi Y, Sano H, Araki N. Structures of advanced glycation end products and their role in pathophysiological states. Contrib Nephrol 2015; 112:32-41. [PMID: 7554991 DOI: 10.1159/000424090] [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: 01/25/2023]
Affiliation(s)
- S Horiuchi
- Department of Biochemistry, Kumamoto University School of Medicine, Japan
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Kuroki H, Hayashi H, Nakagawa S, Sakamoto K, Higashi T, Nitta H, Hashimoto D, Chikamoto A, Beppu T, Baba H. Effect of LSKL peptide on thrombospondin 1-mediated transforming growth factor β signal activation and liver regeneration after hepatectomy in an experimental model. Br J Surg 2015; 102:813-25. [PMID: 25866938 PMCID: PMC4654236 DOI: 10.1002/bjs.9765] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Revised: 07/24/2014] [Accepted: 12/04/2014] [Indexed: 12/16/2022]
Abstract
Background A strategy for accelerating liver regeneration after hepatectomy would offer great benefits in preventing postoperative liver failure and improving surgical outcomes. Transforming growth factor (TGF) β is a potent inhibitor of hepatocyte proliferation. Recently, thrombospondin (TSP) 1 has been identified as a negative regulator of liver regeneration by activation of local TGF-β signals. This study aimed to clarify whether the LSKL (leucine–serine–lysine–leucine) peptide, which inhibits TSP-1-mediated TGF-β activation, promotes liver regeneration after hepatectomy in mice. Methods Mice were operated on with a 70 per cent hepatectomy or sham procedure. Operated mice received either LSKL peptide or normal saline intraperitoneally at abdominal closure and 6 h after hepatectomy. Perioperative plasma TSP-1 levels were measured by enzyme-linked immunosorbent assay in patients undergoing hepatectomy. Results Administration of LSKL peptide attenuated Smad2 phosphorylation at 6 h. S-phase entry of hepatocytes was accelerated at 24 and 48 h by LSKL peptide, which resulted in faster recovery of the residual liver and bodyweight. Haematoxylin and eosin tissue staining and blood biochemical examinations revealed no significant adverse effects following the two LSKL peptide administrations. In the clinical setting, plasma TSP-1 levels were lowest on the first day after hepatectomy. However, plasma TSP-1 levels at this stage were significantly higher in patients with subsequent liver dysfunction compared with levels in those without liver dysfunction following hepatectomy. Conclusion Only two doses of LSKL peptide during the early period after hepatectomy can promote liver regeneration. The transient inhibition of TSP-1/TGF-β signal activation using LSKL peptide soon after hepatectomy may be a promising strategy to promote subsequent liver regeneration.
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Affiliation(s)
- H Kuroki
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - H Hayashi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - S Nakagawa
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - K Sakamoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - T Beppu
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
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Higashi T, Katsuno T, Kitajiri SI, Furuse M. Deficiency of angulin-2/ILDR1, a tricellular tight junction-associated membrane protein, causes deafness with cochlear hair cell degeneration in mice. PLoS One 2015; 10:e0120674. [PMID: 25822906 PMCID: PMC4378975 DOI: 10.1371/journal.pone.0120674] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 02/05/2015] [Indexed: 11/18/2022] Open
Abstract
Tricellular tight junctions seal the extracellular spaces of tricellular contacts, where the vertices of three epithelial cells meet, and are required for the establishment of a strong barrier function of the epithelial cellular sheet. Angulins and tricellulin are known as specific protein components of tricellular tight junctions, where angulins recruit tricellulin. Mutations in the genes encoding angulin-2/ILDR1 and tricellulin have been reported to cause human hereditary deafness DFNB42 and DFNB49, respectively. To investigate the pathogenesis of DFNB42, we analyzed mice with a targeted disruption of Ildr1, which encodes angulin-2/ILDR1. Ildr1 null mice exhibited profound deafness. Hair cells in the cochlea of Ildr1 null mice develop normally, but begin to degenerate by two weeks after birth. Tricellulin localization at tricellular contacts of the organ of Corti in the cochlea was retained in Ildr1 null mice, but its distribution along the depth of tricellular contacts was affected. Interestingly, compensatory tricellular contact localization of angulin-1/LSR was observed in the organ of Corti in Ildr1 null mice although it was hardly detected in the organ of Corti in wild-type mice. The onset of hair cell degeneration in Ildr1 null mice was earlier than that in the reported Tric mutant mice, which mimic one of the tricellulin mutations in DFNB49 deafness. These results indicate that the angulin-2/ILDR1 deficiency causes the postnatal degenerative loss of hair cells in the cochlea, leading to human deafness DFNB42. Our data also suggest that angulin family proteins have distinct functions in addition to their common roles of tricellulin recruitment and that the function of angulin-2/ILDR1 for hearing cannot be substituted by angulin-1/LSR.
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Affiliation(s)
- Tomohito Higashi
- Division of Cell Biology, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tatsuya Katsuno
- Department of Otolaryngology—Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shin-ichiro Kitajiri
- Department of Otolaryngology—Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- * E-mail: (SK); (MF)
| | - Mikio Furuse
- Division of Cell Biology, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Japan
- Division of Cerebral Structure, National Institute for Physiological Sciences, Okazaki, Aichi, Japan
- Department of Physiological Sciences, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Aichi, Japan
- * E-mail: (SK); (MF)
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Kogi Y, Higashi T, Matsukawa S, Mase A, Kohagura J, Nagayama Y, Kawahata K, Kuwahara D, Yoshikawa M. Validation experiment of a numerically processed millimeter-wave interferometer in a laboratory. Rev Sci Instrum 2014; 85:11D411. [PMID: 25430174 DOI: 10.1063/1.4893430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We propose a new interferometer system for density profile measurements. This system produces multiple measurement chords by a leaky-wave antenna driven by multiple frequency inputs. The proposed system was validated in laboratory evaluation experiments. We confirmed that the interferometer generates a clear image of a Teflon plate as well as the phase shift corresponding to the plate thickness. In another experiment, we confirmed that quasi-optical mirrors can produce multiple measurement chords; however, the finite spot size of the probe beam degrades the sharpness of the resulting image.
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Affiliation(s)
- Y Kogi
- Department of Information Electronics, Fukuoka Institute of Technology, Fukuoka 811-0295, Japan
| | - T Higashi
- Department of Information Electronics, Fukuoka Institute of Technology, Fukuoka 811-0295, Japan
| | - S Matsukawa
- Department of Information Electronics, Fukuoka Institute of Technology, Fukuoka 811-0295, Japan
| | - A Mase
- Art, Science and Technology Center for Cooperative Research, Kyushu University, Kasuga, Fukuoka 816-0811, Japan
| | - J Kohagura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y Nagayama
- National Institute for Fusion Science, Toki, Gifu 509-5202, Japan
| | - K Kawahata
- National Institute for Fusion Science, Toki, Gifu 509-5202, Japan
| | - D Kuwahara
- Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - M Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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Tokuda S, Higashi T, Furuse M. ZO-1 knockout by TALEN-mediated gene targeting in MDCK cells: involvement of ZO-1 in the regulation of cytoskeleton and cell shape. PLoS One 2014; 9:e104994. [PMID: 25157572 PMCID: PMC4144852 DOI: 10.1371/journal.pone.0104994] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 07/16/2014] [Indexed: 12/23/2022] Open
Abstract
ZO-1, ZO-2 and ZO-3 are tight junction-associated scaffold proteins that bind to transmembrane proteins of tight junctions and the underlying cytoskeleton. ZO-1 is involved in the regulation of cytoskeletal organization, but its detailed molecular mechanism is less well understood. Gene knockout is an ideal method to investigate the functions of proteins that might have redundant functions such as ZO proteins, when compared with methods such as RNA interference-mediated suppression of gene expression. In this study we applied transcription activator-like effector nucleases (TALENs), a recently developed genome editing method for gene knockout, and established ZO-1 knockout clones in Madin-Darby canine kidney (MDCK) cells. ZO-1 knockout induced striking changes in myosin organization at cell–cell contacts and disrupted the localization of tight junction proteins; these findings were previously unseen in studies of ZO-1 knockdown by RNA interference. Rescue experiments revealed that trace ZO-1 expression reversed these changes while excessive ZO-1 expression induced an intensive zigzag shape of cell–cell junctions. These results suggest a role for ZO-1 in the regulation of cytoskeleton and shape of cell–cell junctions in MDCK cells and indicate the advantage of knockout analysis in cultured cells.
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Affiliation(s)
- Shinsaku Tokuda
- Division of Cell Biology, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tomohito Higashi
- Division of Cell Biology, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Mikio Furuse
- Division of Cell Biology, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Japan
- Division of Cerebral Structure, National Institute for Physiological Sciences, Okazaki, Japan
- * E-mail:
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Kitamura H, Terunuma N, Kurosaki S, Hata K, Masuda M, Kochi T, Yanagi N, Murase T, Ogami A, Higashi T. A cohort study of toner-handling workers on inflammatory, allergic, and oxidative stress markers. Hum Exp Toxicol 2014; 34:337-44. [DOI: 10.1177/0960327113512339] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objectives: This study examines the relationship between toner exposure and its health effects in terms of biomarkers which are known to assess the damages to humans caused by toxic material exposure. Methods: The subjects were 1504 male workers aged below 50 in 2003 in a Japanese toner and photocopier manufacturing company. Personal exposure measurements, pulmonary function tests, chest X-ray examinations, biomarker measurement, and a questionnaire about respiratory symptoms were conducted. We will report about biomarker measurement in this study. Cross-sectional survey studies and a longitudinal study from 2003 to 2008 were conducted. Results: Few significant findings were associated with the toner exposure in both the cross-sectional and the longitudinal studies. The higher toner exposure concentrations did not induce effects on increasing biomarkers. Conclusion: There was no evidence of excessive inflammatory, allergic, or oxidative stress reaction in toner-handling workers as compared to non-handling workers, despite some sporadically significant findings. There are no other reports of a longitudinal epidemiological study with regard to toner exposure; this report significantly contributes to toner exposure literature. Although in the current well-controlled working environment, the toner exposure concentrations are quite low; further studies are needed to completely understand the health effects toner may have, however small they may be.
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Affiliation(s)
- H Kitamura
- Department of Work Systems and Health, Institute of Industrial Ecological Science, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - N Terunuma
- Department of Work Systems and Health, Institute of Industrial Ecological Science, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - S Kurosaki
- Department of Work Systems and Health, Institute of Industrial Ecological Science, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - K Hata
- Department of Work Systems and Health, Institute of Industrial Ecological Science, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - M Masuda
- Department of Work Systems and Health, Institute of Industrial Ecological Science, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - T Kochi
- Department of Work Systems and Health, Institute of Industrial Ecological Science, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - N Yanagi
- Department of Work Systems and Health, Institute of Industrial Ecological Science, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - T Murase
- Department of Haematology, Tokai University School of Medicine, Hachioji, Japan
| | - A Ogami
- Department of Work Systems and Health, Institute of Industrial Ecological Science, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - T Higashi
- Department of Work Systems and Health, Institute of Industrial Ecological Science, University of Occupational and Environmental Health, Kitakyushu, Japan
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Kitamura H, Terunuma N, Kurosaki S, Hata K, Masuda M, Kochi T, Yanagi N, Murase T, Ogami A, Higashi T. A cohort study using pulmonary function tests and x-ray examination in toner-handling workers: cross-sectional and longitudinal analyses from 2003 to 2008. Hum Exp Toxicol 2014; 34:345-56. [PMID: 25034943 DOI: 10.1177/0960327113520018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVES This study uses pulmonary function tests and chest x-ray examinations to examine the relationship between toner-handling work and its health effects. METHODS The subjects were 1504 male workers in a Japanese toner and photocopier manufacturing company, in the age range from 19 to 50 years in 2003. Personal exposure measurements, pulmonary function tests, chest x-ray examinations, biomarker measurements, and a questionnaire about respiratory symptoms were conducted. The present study reports the results of pulmonary function tests and chest x-ray examinations conducted in the subjects, which includes a cross-sectional study on the toner handling and non-handling workers and a longitudinal study from 2003 to 2008. RESULTS Few significant findings were suspected to be caused by toner exposure found in pulmonary function indices in both the cross-sectional and longitudinal studies. Any obvious fibrotic findings in chest x-ray findings related to the toner exposure could not be found out. CONCLUSION No evidence of adverse effects on pulmonary function indices and chest x-rays was present in the toner-handling workers as compared to the nonspecifically exposed workers. Although the toner exposure concentration is quite low in the current well-controlled working environment, even among the toner-handling workers, we would like to continue this study in the future to verify the toner exposure health effects.
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Affiliation(s)
- H Kitamura
- Department of Work Systems and Health, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - N Terunuma
- Department of Work Systems and Health, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - S Kurosaki
- Department of Work Systems and Health, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - K Hata
- Department of Work Systems and Health, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - M Masuda
- Department of Work Systems and Health, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - T Kochi
- Department of Work Systems and Health, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - N Yanagi
- Department of Work Systems and Health, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - T Murase
- Department of Haematology, Tokai University School of Medicine, Hachioji, Japan
| | - A Ogami
- Department of Work Systems and Health, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - T Higashi
- Department of Work Systems and Health, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
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Furuse M, Izumi Y, Oda Y, Higashi T, Iwamoto N. Molecular organization of tricellular tight junctions. Tissue Barriers 2014; 2:e28960. [PMID: 25097825 PMCID: PMC4117683 DOI: 10.4161/tisb.28960] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 04/19/2014] [Accepted: 04/21/2014] [Indexed: 01/22/2023] Open
Abstract
When the apicolateral border of epithelial cells is compared with a polygon, its sides correspond to the apical junctional complex, where cell adhesion molecules assemble from the plasma membranes of two adjacent cells. On the other hand, its vertices correspond to tricellular contacts, where the corners of three cells meet. Vertebrate tricellular contacts have specialized structures of tight junctions, termed tricellular tight junctions (tTJs). tTJs were identified by electron microscopic observations more than 40 years ago, but have been largely forgotten in epithelial cell biology since then. The identification of tricellulin and angulin family proteins as tTJ-associated membrane proteins has enabled us to study tTJs in terms of not only the paracellular barrier function but also unknown characteristics of epithelial cell corners via molecular biological approaches.
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Affiliation(s)
- Mikio Furuse
- Division of Cell Biology; Department of Physiology and Cell Biology; Kobe University Graduate School of Medicine; Kobe, Japan ; Division of Cerebral Structure; National Institute for Physiological Sciences; Okazaki, Aichi Japan
| | - Yasushi Izumi
- Division of Cell Biology; Department of Physiology and Cell Biology; Kobe University Graduate School of Medicine; Kobe, Japan
| | - Yukako Oda
- Division of Cell Biology; Department of Physiology and Cell Biology; Kobe University Graduate School of Medicine; Kobe, Japan
| | - Tomohito Higashi
- Division of Cell Biology; Department of Physiology and Cell Biology; Kobe University Graduate School of Medicine; Kobe, Japan
| | - Noriko Iwamoto
- Division of Cell Biology; Department of Physiology and Cell Biology; Kobe University Graduate School of Medicine; Kobe, Japan
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Iwamoto N, Higashi T, Furuse M. Localization of Angulin-1/LSR and Tricellulin at Tricellular Contacts of Brain and Retinal Endothelial Cells in vivo. Cell Struct Funct 2014; 39:1-8. [DOI: 10.1247/csf.13015] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Noriko Iwamoto
- Division of Cell Biology, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine
| | - Tomohito Higashi
- Division of Cell Biology, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine
| | - Mikio Furuse
- Division of Cell Biology, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine
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Abstract
Tricellulin is a tricellular tight junction-associated membrane protein that controls movement of solutes at these specialized cell intersections. Mutations in the gene encoding tricellulin, TRIC, lead to nonsyndromic deafness. In this issue of the JCI, Nayak et al. created a gene-targeted knockin mouse in order to mimic the pathology of a human TRIC mutation. Deafness appears to be caused either by an increase in the K+ ion concentration around the basolateral surfaces of the outer hair cells or, alternatively, by an increase in small molecules such as ATP around the hair bundle, leading to cellular dysfunction and degeneration. Furthermore, the mice have features suggestive of syndromic hearing loss, which may have implications for care and treatment of patients harboring TRIC mutations.
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Affiliation(s)
- Tomohito Higashi
- Division of Cell Biology, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Kobe, Japan
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Higashi T, Tokuda S, Kitajiri SI, Masuda S, Nakamura H, Oda Y, Furuse M. Analysis of the ‘angulin’ proteins LSR, ILDR1 and ILDR2 – tricellulin recruitment, epithelial barrier function and implication in deafness pathogenesis. J Cell Sci 2013. [DOI: 10.1242/jcs.138271] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Igaki M, Higashi T, Hamamoto S, Kodama S, Naito S, Tokuhara S. A study of the behavior and mechanism of thermal conduction in the skin under moist and dry heat conditions. Skin Res Technol 2013; 20:43-9. [DOI: 10.1111/srt.12081] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/03/2013] [Indexed: 10/26/2022]
Affiliation(s)
- M. Igaki
- Personal Health Care Products Research Laboratories; Kao Corporation; Tokyo Japan
| | - T. Higashi
- Personal Health Care Products Research Laboratories; Kao Corporation; Tokyo Japan
| | - S. Hamamoto
- Processing Development Research Laboratories; Kao Corporation; Tochigi Japan
| | - S. Kodama
- Processing Development Research Laboratories; Kao Corporation; Tochigi Japan
| | - S. Naito
- Analytical Science Research Laboratories; Kao Corporation; Tochigi Japan
| | - S. Tokuhara
- Analytical Science Research Laboratories; Kao Corporation; Tochigi Japan
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Yamauchi H, Higashi T, Kagawa S, Kishibe Y, Takahashi M. Chronic hemodynamic compromise and cerebral ischemic events in asymptomatic or remote symptomatic large-artery intracranial occlusive disease. AJNR Am J Neuroradiol 2013; 34:1704-10. [PMID: 23471022 DOI: 10.3174/ajnr.a3491] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE In asymptomatic or remote symptomatic LAICOD, the risk of ischemic events is low in general, but there may be a subgroup of higher risk patients who require aggressive medical management. The purpose of this study was to determine whether chronic hemodynamic compromise is a predictor of ischemic events in asymptomatic or remote symptomatic LAICOD. MATERIALS AND METHODS We prospectively studied 51 asymptomatic, 19 coexistent asymptomatic, and 19 remote (>6 months) symptomatic patients with atherosclerotic intracranial internal carotid artery or middle cerebral artery disease by using (15)O-PET. MP was defined as decreased CBF, increased OEF, and a decreased CBF/CBV ratio. All patients were followed up for 2 years or until occurrence of stroke or TIA or death. RESULTS Bypass surgery was performed in 4 patients (2 with MP). Three cerebral ischemic events (1 TIA in an asymptomatic patient, 1 stroke, and 1 TIA in a remote symptomatic patient) occurred in the vascular territory ipsilateral to LAICOD. Kaplan-Meier analysis with censoring at the time of bypass surgery revealed that the incidence of ipsilateral ischemic events in patients with MP (2/5) was significantly higher than that in patients without MP (1/84) (log-rank test; P < .0001). The relative risk conferred by MP was 83.1 (95% confidence interval, 6.8-1017.4; P < .001). The incidence of ipsilateral ischemic events in patients with decreased CBF/CBV (2/9) was also significantly higher than that of patients without it (1/80) (P = .0001). CONCLUSIONS Chronic hemodynamic compromise may be a predictor of ischemic events in both asymptomatic and remote symptomatic LAICOD.
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Affiliation(s)
- H Yamauchi
- Division of PET Imaging, Shiga Medical Center Research Institute, Shiga, Japan
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Higashi T, Nakamura F, Shibata A, Emori Y, Nishimoto H. The National Database of Hospital-based Cancer Registries: A Nationwide Infrastructure to Support Evidence-based Cancer Care and Cancer Control Policy in Japan. Jpn J Clin Oncol 2013; 44:2-8. [DOI: 10.1093/jjco/hyt013] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Furuse M, Oda Y, Higashi T, Iwamoto N, Masuda S. Lipolysis-stimulated lipoprotein receptor: a novel membrane protein of tricellular tight junctions. Ann N Y Acad Sci 2012; 1257:54-8. [PMID: 22671589 DOI: 10.1111/j.1749-6632.2012.06486.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Tricellular tight junctions (tTJs) are specialized structural variants of tight junctions that restrict the free diffusion of solutes at the extracellular space of tricellular contacts. Their presence at cell corners, situated in the angles between three adjacent epithelial cells, was identified early by electron microscopy, but despite their potential importance, tTJs have been generally ignored in epithelial cell biology. Tricellulin was the first molecular component of tTJs shown to be involved in their formation and in epithelial barrier function. However, the precise molecular organization and function of tTJs are still largely unknown. Recently, we identified the lipolysis-stimulated lipoprotein receptor (LSR) as a tTJ-associated membrane protein. LSR recruits tricellulin to tTJs, suggesting that the LSR-tricellulin system plays a key role in tTJ formation. In this paper, we summarize the identification and characterization of LSR as a molecular component of tTJs.
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Affiliation(s)
- Mikio Furuse
- Division of Cell Biology, Department of Physiology and Cell Biology, Kobe University Graduate School of Medicine, Japan.
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Higashi T, Nakamura F, Saruki N, Takegami M, Hosokawa T, Fukuhara S, Nakayama T, Sobue T. Evaluation of Newspaper Articles for Coverage of Public Reporting Data: A Case Study of Unadjusted Cancer Survival Data. Jpn J Clin Oncol 2012; 43:95-100. [DOI: 10.1093/jjco/hys190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Nakamura F, Higashi T, Emori Y, Nishimoto H. Variations of Discordance of the Clinical TNM Stage with the Pathological TNM Stage between Japanese Designated Cancer Hospitals. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33738-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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