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Sakai H, Kamuro H, Tokunoh N, Izawa T, Tamiya S, Yamamoto A, Tanaka S, Okuzaki D, Ono C, Matsuura Y, Okada Y, Yoshioka Y, Fujio Y, Obana M. JAK inhibition during the early phase of SARS-CoV-2 infection worsens kidney injury by suppressing endogenous antiviral activity in mice. Am J Physiol Renal Physiol 2024. [PMID: 38634132 DOI: 10.1152/ajprenal.00011.2024] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 04/09/2024] [Indexed: 04/19/2024] Open
Abstract
Coronavirus disease 2019 (COVID-19) induces respiratory dysfunction as well as kidney injury. Although the kidney is considered a target organ of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) and affected by COVID-19-induced cytokine storm, the mechanisms of renal reaction in SARS-CoV-2 infection are unknown. In this study, a murine COVID-19 model was induced by nasal infection with mouse-adapted SARS-CoV-2 (MA10). MA10 infection induced body weight loss along with lung inflammation in mice four days after infection. Serum creatinine levels and the urinary albumin/creatinine ratio increased on day 4 after MA10 infection. Measurement of the urinary neutrophil gelatinase-associated lipocalin/creatinine ratio and hematoxylin and eosin staining revealed tubular damage in MA10-infected murine kidneys, indicating kidney injury in the murine COVID-19 model. Interferon (IFN)-γ and interleukin-6 upregulation in the sera of MA10-infected mice, along with the absence of MA10 in the kidneys, implied that the kidneys were affected by the MA10 infection-induced cytokine storm rather than by direct MA10 infection of the kidneys. RNA-sequencing analysis revealed that antiviral genes, such as the IFN/Janus kinase (JAK) pathway, were upregulated in MA10-infected kidneys. Upon administration of the JAK inhibitor baricitinib on days 1-3 after MA10 infection, an antiviral pathway was suppressed, and MA10 was detected more frequently in the kidneys. Notably, JAK inhibition upregulated the hypoxia response and exaggerated kidney injury. These results suggest that endogenous antiviral activity protects against SARS-CoV-2-induced kidney injury in the early phase of infection, providing valuable insights into the pathogenesis of COVID-19-associated nephropathy.
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Affiliation(s)
- Hibiki Sakai
- Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | | | - Nagisa Tokunoh
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
| | - Shigeyuki Tamiya
- Microbiology and Immunology, Wakayama Medical University, Osaka, Japan
| | | | - Shota Tanaka
- Laboratory of Clinical Science and Biomedicine, Osaka University, Suita, Osaka, Japan
| | - Daisuke Okuzaki
- Genome Information Research Center, Osaka University, Suita, Osaka, Japan
| | - Chikako Ono
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Yoshiharu Matsuura
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Yoshiaki Okada
- Laboratory of Clinical Science and Biomedicine, Osaka University, Suita, Osaka, Japan
| | - Yasuo Yoshioka
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Yasushi Fujio
- Laboratory of Clinical Science and Biomedicine, Osaka University, Suita, Osaka, Japan
| | - Masanori Obana
- Laboratory of Clinical Science and Biomedicine, Osaka University, Suita, Osaka, Japan
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Inai Y, Izawa T, Kamei T, Fujiwara S, Tanaka M, Yamate J, Kuwamura M. Difference in the Mechanism of Iron Overload-Enhanced Acute Hepatotoxicity Induced by Thioacetamide and Carbon Tetrachloride in Rats. Toxicol Pathol 2024:1926233241235623. [PMID: 38528719 DOI: 10.1177/01926233241235623] [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] [Indexed: 03/27/2024]
Abstract
Iron overload has been recognized as a risk factor for liver disease; however, little is known about its pathological role in the modification of liver injury. The purpose of this study is to investigate the influence of iron overload on liver injury induced by two hepatotoxicants with different pathogenesis in rats. Rats were fed a control (Cont), 0.8% high-iron (0.8% Fe), or 1% high-iron diet (1% Fe) for 4 weeks and were then administered with saline, thioacetamide (TAA), or carbon tetrachloride (CCl4). Hepatic and systemic iron overload were seen in the 0.8% and 1% Fe groups. Twenty-four hours after administration, hepatocellular necrosis induced by TAA and hepatocellular necrosis, degeneration, and vacuolation induced by CCl4, as well as serum transaminase values, were exacerbated in the 0.8% and 1% Fe groups compared to the Cont group. On the other hand, microvesicular vacuolation induced by CCl4 was decreased in 0.8% and 1% Fe groups. Hepatocellular DNA damage was increased by iron overload in both models, whereas a synergistic effect of oxidative stress by excess iron and hepatotoxicant was only present in the CCl4 model. The data showed that dietary iron overload exacerbates TAA- and CCl4-induced acute liver injury with different mechanisms.
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Affiliation(s)
- Yohei Inai
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
| | - Tomomi Kamei
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
| | - Sho Fujiwara
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
| | - Miyuu Tanaka
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
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Ono N, Horikoshi J, Izawa T, Nishiyama K, Tanaka M, Fujita T, Kuwamura M, Azuma YT. Functional role of IL-19 in a mouse model of L-arginine-induced pancreatitis and related lung injury. Exp Anim 2023:23-0094. [PMID: 38057085 DOI: 10.1538/expanim.23-0094] [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] [Indexed: 12/08/2023] Open
Abstract
IL-19 is a member of IL-10 family and is mainly produced by macrophages. Acute pancreatitis (AP) is an inflammatory disease characterized by acinar cell injury and necrosis. In the present study, the role of IL-19 in AP and AP-associated lung injury in mice was explored using L-arginine-induced pancreatitis. Experimental pancreatitis was induced by intraperitoneal injection of L-arginine in wild-type (WT) and IL-19 gene deficient (IL-19 KO) mice. In L-arginine treated mice, the serum amylase level was significantly increased in IL-19 KO mice, and interstitial edema, analyzed using hematoxylin and eosin (H&E)-stained sections, was aggravated mildly in IL-19 KO mice compared to WT mice. Compared to WT mice treated with L-arginine, mRNA expression of tumor necrosis factor (TNF)-α was significantly upregulated in IL-19 KO mice treated with L-arginine. In WT mice, IL-19 mRNA was equally expressed in the pancreas of both control and L-arginine treated mice. The condition of lung alveoli in WT and IL-19 KO mice treated with L-arginine was then evaluated. In mice with L-arginine-induced pancreatitis, alveolar area was remarkedly decreased, and expression of lung myeloperoxidase was significantly increased in IL-19 KO mice compared to WT mice. In the lungs, mRNA expressions of IL-6 and inducible nitric oxide synthase were significantly increased in IL-19 KO mice compared to WT mice. In summary, IL-19 was proposed to alleviate L-arginine-induced pancreatitis by regulating TNF-α production and to protect against AP-related lung injury by inhibiting neutrophil migration.
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Affiliation(s)
- Naoshige Ono
- Laboratory of Prophylactic Pharmacology, Osaka Metropolitan University Graduate School of Veterinary Science
| | - Joji Horikoshi
- Laboratory of Prophylactic Pharmacology, Osaka Metropolitan University Graduate School of Veterinary Science
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Metropolitan University Graduate School of Veterinary Science
| | - Kazuhiro Nishiyama
- Laboratory of Prophylactic Pharmacology, Osaka Metropolitan University Graduate School of Veterinary Science
| | - Miyuu Tanaka
- Laboratory of Veterinary Pathology, Osaka Metropolitan University Graduate School of Veterinary Science
| | - Takashi Fujita
- Molecular Toxicology Laboratory, Department of Pharmaceutical Sciences, Ritsumeikan University
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Metropolitan University Graduate School of Veterinary Science
| | - Yasu-Taka Azuma
- Laboratory of Prophylactic Pharmacology, Osaka Metropolitan University Graduate School of Veterinary Science
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Murakami T, Kobayashi N, Iwaide S, Itoh Y, Hisada M, Izawa T, Kuwamura M. Identification of calcitonin receptor-stimulating peptide 1-derived amyloid in a feline C-cell carcinoma. Amyloid 2023:1-3. [PMID: 37981706 DOI: 10.1080/13506129.2023.2282361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 11/06/2023] [Indexed: 11/21/2023]
Affiliation(s)
- Tomoaki Murakami
- Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Natsumi Kobayashi
- Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Susumu Iwaide
- Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Yoshiyuki Itoh
- Smart-Core-Facility Promotion Organization, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Miki Hisada
- Smart-Core-Facility Promotion Organization, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
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Watanabe S, Takagi A, Yuba E, Kojima C, Dei N, Matsumoto A, Tanikawa J, Kawamura T, De Silva NH, Izawa T, Akazawa T, Kanegi R, Hatoya S, Inaba T, Sugiura K. In vivo transfection of cytokine genes into tumor cells using a synthetic vehicle promotes antitumor immune responses in a visceral tumor model. FASEB J 2023; 37:e23228. [PMID: 37815518 DOI: 10.1096/fj.202202036r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 08/09/2023] [Accepted: 09/18/2023] [Indexed: 10/11/2023]
Abstract
The tumor microenvironment (TME) strongly affects the clinical outcomes of immunotherapy. This study aimed to activate the antitumor immune response by manipulating the TME by transfecting genes encoding relevant cytokines into tumor cells using a synthetic vehicle, which is designed to target tumor cells and promote the expression of transfected genes. Lung tumors were formed by injecting CT26.WT intravenously into BALB/c mice. Upon intravenous injection of the green fluorescent protein-coding plasmid encapsulated in the vehicle, 14.2% tumor-specific expression was observed. Transfection of the granulocyte-macrophage colony-stimulating factor (GM-CSF) and CD40 ligand (L)-plasmid combination and interferon gamma (IFNγ) and CD40L-plasmid combination showed 45.5% and 54.5% complete remission (CR), respectively, on day 60; alternate treatments with both the plasmid combinations elicited 66.7% CR, while the control animals died within 48 days. Immune status analysis revealed that the density of dendritic cells significantly increased in tumors, particularly after GM-CSF- and CD40L-gene transfection, while that of regulatory T cells significantly decreased. The proportion of activated killer cells and antitumoral macrophages significantly increased, specifically after IFNγ and CD40L transfection. Furthermore, the level of the immune escape molecule programmed death ligand-1 decreased in tumors after transfecting these cytokine genes. As a result, tumor cell-specific transfection of these cytokine genes by the synthetic vehicle significantly promotes antitumor immune responses in the TME, a key aim for visceral tumor therapy.
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Affiliation(s)
- Shunichi Watanabe
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Japan
| | - Ayaka Takagi
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Japan
| | - Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Sakai, Japan
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, Sakai, Japan
| | - Chie Kojima
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Sakai, Japan
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, Sakai, Japan
| | - Nanako Dei
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Sakai, Japan
| | - Akikazu Matsumoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Sakai, Japan
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, Sakai, Japan
| | - Jun Tanikawa
- Bioscience Research Laboratory, Sumitomo Chemical Company, Ltd., Osaka, Japan
| | - Tetsuya Kawamura
- Bioscience Research Laboratory, Sumitomo Chemical Company, Ltd., Osaka, Japan
| | - Nadeeka H De Silva
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Japan
| | - Takeshi Izawa
- Department of Integrated Structural Biosciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Japan
- Department of Integrated Structural Biosciences, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Japan
| | - Takashi Akazawa
- Department of Cancer Drug Discovery and Development, Research Center, Osaka International Cancer Institute, Osaka, Japan
| | - Ryoji Kanegi
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Japan
- Department of Advanced Pathobiology, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Japan
| | - Shingo Hatoya
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Japan
- Department of Advanced Pathobiology, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Japan
| | - Toshio Inaba
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Japan
- Department of Advanced Pathobiology, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Japan
| | - Kikuya Sugiura
- Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Japan
- Department of Advanced Pathobiology, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Japan
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Takami Y, Tanaka M, Morita M, Maruno T, Anai N, Sudo T, Kezuka C, Izawa T, Yamate J, Kuwamura M. Pleural mesothelioma in a California sea lion (Zalophus californianus). J Vet Med Sci 2023; 85:1030-1033. [PMID: 37532588 PMCID: PMC10539812 DOI: 10.1292/jvms.22-0457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023] Open
Abstract
A 25-year-old female California sea lion (Zalophus californianus) reared in an aquarium died following a history of anorexia, lethargy, abnormal protrusion of the skin, and oral respiration. At necropsy, multiple yellowish-white nodules with diameters of 0.1-0.5 cm were disseminated in the thoracic cavity and lungs. Histopathologically, the nodules were continuous with normal mesothelium and were characterized by the proliferation of spindle-shaped to polygonal neoplastic cells with prominent atypia. The neoplastic cells exhibited diffuse, strong staining for vimentin and partial, weak to moderate staining for cytokeratin AE1/AE3. Based on these findings, the lesions were diagnosed as pleural mesothelioma. This study reports the first case of pleural mesothelioma in California sea lion.
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Affiliation(s)
- Yuki Takami
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
| | - Miyuu Tanaka
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
| | | | - Takaya Maruno
- Katsurahama Aquarium, Inside Katsurahama Park, Kochi, Japan
| | - Naohiro Anai
- Katsurahama Aquarium, Inside Katsurahama Park, Kochi, Japan
| | | | | | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Osaka, Japan
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Hasan MM, Konishi S, Tanaka M, Izawa T, Yamate J, Kuwamura M. Disrupted neurogenesis, gliogenesis, and ependymogenesis in the Ccdc85c knockout rat for hydrocephalus model. Cells Dev 2023; 175:203858. [PMID: 37271245 DOI: 10.1016/j.cdev.2023.203858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 05/11/2023] [Accepted: 05/31/2023] [Indexed: 06/06/2023]
Abstract
Coil-coiled domain containing 85c (Ccdc85c) is a causative gene for congenital hydrocephalus and subcortical heterotopia with frequent brain hemorrhage. We established Ccdc85c knockout (KO) rats and investigated the roles of CCDC85C and intermediate filament protein expression, including nestin, vimentin, GFAP, and cytokeratin AE1/AE3 during the lateral ventricle development in KO rats to evaluate the role of this gene. We found altered and ectopic expression of nestin and vimentin positive cells in the wall of the dorso-lateral ventricle in the KO rats during development from the age of postnatal day (P) 6, whereas both protein expression became faint in the wild-type rats. In the KO rats, there was a loss of cytokeratin expression on the surface of the dorso-lateral ventricle with ectopic expression and maldevelopment of ependymal cells. Our data also revealed disturbed GFAP expression at postnatal ages. These findings indicate that lack of CCDC85C disrupts the proper expression of intermediate filament proteins (nestin, vimentin, GFAP, and cytokeratin), and CCDC85C is necessary for normal neurogenesis, gliogenesis, and ependymogenesis.
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Affiliation(s)
- Md Mehedi Hasan
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Izumisano, Osaka 598-8531, Japan.
| | - Shizuka Konishi
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Izumisano, Osaka 598-8531, Japan.
| | - Miyuu Tanaka
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Izumisano, Osaka 598-8531, Japan.
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Izumisano, Osaka 598-8531, Japan.
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Izumisano, Osaka 598-8531, Japan.
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Izumisano, Osaka 598-8531, Japan.
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Ono N, Fujita T, Miki M, Nishiyama K, Izawa T, Aoyama T, Kuwamura M, Fujii H, Azuma YT. Interleukin-19 Gene-Deficient Mice Promote Liver Fibrosis via Enhanced TGF-β Signaling, and the Interleukin-19-CCL2 Axis Is Important in the Direction of Liver Fibrosis. Biomedicines 2023; 11:2064. [PMID: 37509702 PMCID: PMC10377488 DOI: 10.3390/biomedicines11072064] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/05/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023] Open
Abstract
IL-19 is a cytokine discovered by homologous searching with IL-10 and is produced by non-immune cells, such as keratinocytes, in addition to immune cells, such as macrophages. Liver fibrosis results from the inflammation and activation of hepatic stellate cells via chronic liver injury. However, the participation of IL-19 in liver fibrosis remains to be sufficiently elucidated. Our group studied the immunological function of IL-19 in a mouse model of carbon tetrachloride (CCl4)-induced liver fibrosis. IL-19 gene-deficient (KO) mice and body weight-matched wild-type (WT) mice were used. A liver fibrosis mouse model was created via CCl4 administration (two times per week) for 8 weeks. In CCl4-induced liver fibrosis, serum analysis revealed that IL-19 KO mice had higher ALT levels compared to WT mice. IL-19 KO mice had worse fibrosis, as assessed by morphological evaluation of total area stained positive with Azan and Masson trichrome. In addition, the expression of α-SMA was increased in liver tissues of IL-19 KO mice compared to WT mice. Furthermore, mRNA expression levels of TGF-β and α-SMA were enhanced in IL-19 KO mice compared to WT mice. In vitro assays revealed that IL-19-high expressing RAW264.7 cells inhibited the migration of NIH3T3 cells via the inhibited expression of CCL2 in the presence of CCl4 and IL-4. These findings indicate that IL-19 plays a critical role in liver fibrosis by affecting TGF-β signaling and the migration of hepatic stellate cells during liver injury. Enhancement of the IL-19 signaling pathway is a potential treatment for liver fibrosis.
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Affiliation(s)
- Naoshige Ono
- Laboratory of Prophylactic Pharmacology, Osaka Metropolitan University Graduate School of Veterinary Science, Osaka 598-8531, Japan
| | - Takashi Fujita
- Molecular Toxicology Laboratory, Department of Pharmaceutical Sciences, Ritsumeikan University, Shiga 525-8577, Japan
| | - Mariko Miki
- Laboratory of Prophylactic Pharmacology, Osaka Metropolitan University Graduate School of Veterinary Science, Osaka 598-8531, Japan
| | - Kazuhiro Nishiyama
- Laboratory of Prophylactic Pharmacology, Osaka Metropolitan University Graduate School of Veterinary Science, Osaka 598-8531, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Metropolitan University Graduate School of Veterinary Science, Osaka 598-8531, Japan
| | - Tomoko Aoyama
- Molecular Toxicology Laboratory, Department of Pharmaceutical Sciences, Ritsumeikan University, Shiga 525-8577, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Metropolitan University Graduate School of Veterinary Science, Osaka 598-8531, Japan
| | - Hideki Fujii
- Department of Hepatology, Graduate School of Medicine, Osaka Metropolitan University, Osaka 545-8585, Japan
| | - Yasu-Taka Azuma
- Laboratory of Prophylactic Pharmacology, Osaka Metropolitan University Graduate School of Veterinary Science, Osaka 598-8531, Japan
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Nakagawa M, Izawa T, Kuwamura M, Yamate J. Analyses of damage-associated molecular patterns, particularly biglycan, in cisplatin-induced rat progressive renal fibrosis. J Toxicol Pathol 2023; 36:181-185. [PMID: 37577365 PMCID: PMC10412960 DOI: 10.1293/tox.2022-0148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 03/07/2023] [Indexed: 08/15/2023] Open
Abstract
Damage-associated molecular patterns (DAMPs) and their receptors (TLR-2 and -4) may play important roles in renal fibrosis, of which the pathogenesis is complicated. We used rat renal lesions induced by a single intraperitoneal injection of cisplatin at 6 mg/kg body weight; consisting of tissue damage of renal tubules on days 1 and 3, further damage and regeneration with inflammation mainly on days 5 and 7, and interstitial fibrosis on days 9, 12, 15, and 20. Microarray analyses on days 5 (the commencement of inflammation) and 9 (the commencement of interstitial fibrosis) showed that DAMPs increased by more than two-fold relative to control included common extra-cellular matrix (ECM) components such as laminin (Lamc2) and fibronectin, and heat shock protein family, as well as fibrinogen, although it was limited analysis; Lamc2, an element of basement membrane, may be regarded as an indicator for damaged renal tubules. In the real-time RT-PCR analyses, TLR-2 significantly increased transiently on day 1, whereas TLR-4 significantly increased on days 9 and 15, almost in agreement with the increased biglycan (a small leucine-rich proteoglycan as ubiquitous ECM component). As M1/M2 macrophages participated in renal lesions, such as inflammation and fibrosis, presumably, TLR-4, which may be expressed in immune cells, could play crucial roles in the formation of renal lesions in association with biglycan.
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Affiliation(s)
- Minto Nakagawa
- Laboratory of Veterinary Pathology, Osaka Metropolitan
University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Metropolitan
University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Metropolitan
University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Metropolitan
University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan
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Takami Y, Tanaka M, Izawa T, Kuwamura M, Yamate J. The effect of lipopolysaccharide on liver homeostasis and diseases based on the mutual interaction of macrophages, autophagy, and damage-associated molecular patterns in male F344/DuCrlCrlj rats. Vet Pathol 2023; 60:461-472. [PMID: 37199489 DOI: 10.1177/03009858231173364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Lipopolysaccharide (LPS) has dose-dependent biphasic functions (cell protective versus cell toxic). To clarify the different effects of LPS on liver homeostasis or liver diseases, comparisons were made between low and high doses of LPS, in terms of the mutual relation of hepatic macrophages, autophagy, and damage-associated molecular patterns (DAMPs) in male F344/DuCrlCrlj rats. Rats injected with low dose (0.1 mg/kg) or high dose (2.0 mg/kg) of LPS were examined at 6, 10, and 24 hours following single injections. Histologically, focal hepatocellular necrosis was occasionally present in high-dose animals, whereas there were no significant changes in low-dose animals. In low-dose animals, Kupffer cells reacting to CD163 and CD204 were hypertrophic and regarded as M2 macrophages, which promote resolution of inflammation and tissue repair, whereas in high-dose animals, infiltration of M1 macrophages expressing CD68 and major histocompatibility complex class II, which enhance cell injury, was seen. Hepatocytes with high-mobility-group box-1 (HMGB1) (one of DAMPs)-positive cytoplasmic granules appeared more frequently in high-dose animals than in low-dose animals, indicating the translocation of nuclear HMGB1 into the cytoplasm. However, although light-chain 3 beta-positive autophagosomes in hepatocytes increased in both doses, abnormally vacuolated autophagosomes were only seen in injured hepatocytes in the high-dose group, indicating possible extracellular release of HMGB1, which might result in cell injury and inflammation. These findings suggested that low-dose LPS induced a favorable mutual relationship among hepatic macrophages, autophagy, and DAMPs leading to cytoprotection of hepatocytes, whereas failures of the relationship in high-dose LPS caused hepatocyte injury.
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Affiliation(s)
- Yuki Takami
- Osaka Metropolitan University, Izumisano, Japan
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Nishiyama N, Shinozawa A, Matsumoto T, Izawa T. High genome heterozygosity revealed vegetative propagation over the sea in Moso bamboo. BMC Genomics 2023; 24:348. [PMID: 37355596 DOI: 10.1186/s12864-023-09428-9] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 06/04/2023] [Indexed: 06/26/2023] Open
Abstract
BACKGROUND Moso bamboo (Phyllostachys edulis) is a typical East Asian bamboo that does not flower for > 60 years and propagates without seed reproduction. Thus, Moso bamboo can be propagated vegetatively, possibly resulting in highly heterozygous genetic inheritance. Recently, a draft genome of Moso bamboo was reported, followed by whole genome single nucleotide polymorphisms (SNP) analysis, which showed that the genome of Moso bamboo in China has regional characteristics. Moso bamboo in Japan is thought to have been introduced from China over the sea in 1736. However, it is unclear where and how Moso bamboo was introduced in Japan from China. Here, based on detailed analysis of heterozygosity in genome diversity, we estimate the spread of genome diversity and its pedigree of Moso bamboo. RESULTS We sequenced the whole genome of Moso bamboo in Japan and compared them with data reported previously from 15 regions of China. Only 4.1 million loci (0.37% of the analyzed genomic region) were identified as polymorphic loci. We next narrowed down the number of polymorphic loci using several filters and extracted more reliable SNPs. Among the 414,952 high-quality SNPs, 319,431 (77%) loci were identified as heterozygous common to all tested samples. The result suggested that all tested samples were clones via vegetative reproduction. Somatic mutations may accumulate in a heterozygous manner within a single clone. We examined common heterozygous loci between samples from Japan and elsewhere, from which we inferred that an individual closely related to the sample from Fujian, China, was introduced to Japan across the sea without seed reproduction. In addition, we collected 16 samples from four nearby bamboo forests in Japan and performed SNP and insertion/deletion analyses using a genotyping by sequencing (GBS) method. The results suggested that a small number of somatic mutations would spread within and between bamboo groves. CONCLUSIONS High heterozygosity in the genome-wide diversity of Moso bamboo implies the vegetative propagation of Moso bamboo from China to Japan, the pedigree of Moso bamboo in Japan, and becomes a useful marker to approach the spread of genome diversity in clonal plants.
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Affiliation(s)
- Norihide Nishiyama
- Department of Agricultural and Environmental Biology, Laboratory of Plant Breeding & Genetics, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-Ku, Tokyo, 113-8657, Japan
| | - Akihisa Shinozawa
- Department of Bioscience, Faculty of Life Sciences, Tokyo University of Agriculture, 1-1-1 Sakuragaoka Setagaya-Ku, Tokyo, 156-8502, Japan
- The NODAI Genome Research Center (NGRC), Tokyo University of Agriculture, 1-1-1 Sakuragaoka Setagaya-Ku, Tokyo, 156-8502, Japan
| | - Takashi Matsumoto
- Department of Bioscience, Faculty of Life Sciences, Tokyo University of Agriculture, 1-1-1 Sakuragaoka Setagaya-Ku, Tokyo, 156-8502, Japan
| | - Takeshi Izawa
- Department of Agricultural and Environmental Biology, Laboratory of Plant Breeding & Genetics, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-Ku, Tokyo, 113-8657, Japan.
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12
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Cui J, Nishide N, Mashiguchi K, Kuroha K, Miya M, Sugimoto K, Itoh JI, Yamaguchi S, Izawa T. Fertilization controls tiller numbers via transcriptional regulation of a MAX1-like gene in rice cultivation. Nat Commun 2023; 14:3191. [PMID: 37291104 PMCID: PMC10250342 DOI: 10.1038/s41467-023-38670-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 05/05/2023] [Indexed: 06/10/2023] Open
Abstract
Fertilization controls various aspects of cereal growth such as tiller number, leaf size, and panicle size. However, despite such benefits, global chemical fertilizer use must be reduced to achieve sustainable agriculture. Here, based on field transcriptome data from leaf samples collected during rice cultivation, we identify fertilizer responsive genes and focus on Os1900, a gene orthologous to Arabidopsis thaliana MAX1, which is involved in strigolactone biosynthesis. Elaborate genetic and biochemical analyses using CRISPR/Cas9 mutants reveal that Os1900 together with another MAX1-like gene, Os5100, play a critical role in controlling the conversion of carlactone into carlactonoic acid during strigolactone biosynthesis and tillering in rice. Detailed analyses of a series of Os1900 promoter deletion mutations suggest that fertilization controls tiller number in rice through transcriptional regulation of Os1900, and that a few promoter mutations alone can increase tiller numbers and grain yields even under minor-fertilizer conditions, whereas a single defective os1900 mutation does not increase tillers under normal fertilizer condition. Such Os1900 promoter mutations have potential uses in breeding programs for sustainable rice production.
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Affiliation(s)
- Jinying Cui
- Lab. of Plant Breeding & Genetics, Department of Agricultural and Environmental Biology, The University of Tokyo, Tokyo, Japan
| | - Noriko Nishide
- Lab. of Plant Breeding & Genetics, Department of Agricultural and Environmental Biology, The University of Tokyo, Tokyo, Japan
| | - Kiyoshi Mashiguchi
- Chemistry of Molecular Biocatalysts Lab, Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, Japan
| | - Kana Kuroha
- Breeding Material Development Unit, Basic Research Division, National Institute of Crop Science, Tsukuba, Ibaraki, Japan
| | - Masayuki Miya
- Lab. of Plant Breeding & Genetics, Department of Agricultural and Environmental Biology, The University of Tokyo, Tokyo, Japan
| | - Kazuhiko Sugimoto
- Breeding Material Development Unit, Basic Research Division, National Institute of Crop Science, Tsukuba, Ibaraki, Japan
- Division of Crop Design Research, Institute of Crop Science, Tsukuba, Ibaraki, Japan
| | - Jun-Ichi Itoh
- Lab. of Plant Breeding & Genetics, Department of Agricultural and Environmental Biology, The University of Tokyo, Tokyo, Japan
| | - Shinjiro Yamaguchi
- Chemistry of Molecular Biocatalysts Lab, Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, Japan
| | - Takeshi Izawa
- Lab. of Plant Breeding & Genetics, Department of Agricultural and Environmental Biology, The University of Tokyo, Tokyo, Japan.
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13
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Ando T, Izawa T, Nishida H, Akiyoshi H. Clinical findings using echocardiography and plasma cardiac troponin I and pathological findings in dogs with hypertrophic cardiomyopathy: A retrospective study. Open Vet J 2023; 13:742-752. [PMID: 37545712 PMCID: PMC10399649 DOI: 10.5455/ovj.2023.v13.i6.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 05/14/2023] [Indexed: 08/08/2023] Open
Abstract
Background Hypertrophic cardiomyopathy (HCM) is considered rare in dogs, and there is a lack of clinical data. Cardiac troponin I (cTnI) is a biomarker of cardiomyocyte damage and necrosis and can be used to diagnose cat and human HCM. Aim We investigated whether the presence of cTnI in clinical data can be used in conjunction with echocardiography to diagnose canine HCM. Methods This study comprised client-owned dogs with clinical evidence of concentric hypertrophy on echocardiographic images, serum total thyroxine levels of ≤5 µg/dl, systolic blood pressure of ≤180 mmHg, and absence of aortic stenosis. All cases were necropsied. Results Cardiomyocyte hypertrophy (mean diameter, 18.3 ± 1.8 µm), myocardial fiber disarray (70%), interstitial fibrosis (80%), and small vessel disease (100%) were assessed. In dogs with HCM, the left ventricles were concentric, almost symmetrical, and hypertrophied above the aortic diameter. The end-diastolic interventricular septum normalized to body weight [intraventricular septal thickness in diastole (IVSDN)] was 0.788 [interquartile range (IQR), 0.7-0.92], which exceeded the normal range (5%-95%, IQR: 0.33-0.52). In total, 70% of the dogs with HCM had syncope and dyspnea, and all dogs had high cTnI levels (median, 3.94 ng/ml), exceeding the upper limit of normal (0.11 ng/ml) and indicating cardiomyocyte damage. IVSDN and serum cTnI levels were correlated (ρ = 0.839, p = 0.01). Conclusion Ventricular wall thickening and high serum cTnI levels can provide a presumptive diagnosis of HCM and prompt the initiation of treatment or additional diagnostic investigations.
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Affiliation(s)
- Takeki Ando
- Laboratory of Veterinary Surgery, Graduate School of Veterinary Science, Osaka Metropolitan University, Osaka, Japan
- Ando Animal Hospital, Awaji, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Graduate School of Veterinary Science, Osaka Metropolitan University, Osaka, Japan
| | - Hidetaka Nishida
- Laboratory of Veterinary Surgery, Graduate School of Veterinary Science, Osaka Metropolitan University, Osaka, Japan
| | - Hideo Akiyoshi
- Laboratory of Veterinary Surgery, Graduate School of Veterinary Science, Osaka Metropolitan University, Osaka, Japan
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14
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Izawa T, Travlos GS, Cortes RA, Clayton NP, Sills RC, Pandiri AR. Absence of Increased Susceptibility to Acetaminophen-Induced Liver Injury in a Diet-Induced NAFLD Mouse Model. Toxicol Pathol 2023; 51:112-125. [PMID: 37158481 PMCID: PMC10523943 DOI: 10.1177/01926233231171101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a common chronic liver disease and its influence on drug-induced liver injury (DILI) is not fully understood. We investigated whether NAFLD can influence acetaminophen (APAP [N-acetyl-p-aminophenol])-induced hepatotoxicity in a diet-induced obese (DIO) mouse model of NAFLD. The male C57BL/6NTac DIO mice, fed a high-fat diet for more than 12 weeks, developed obesity, hyperinsulinemia, impaired glucose tolerance, and hepatomegaly with hepatic steatosis, similar to human NAFLD. In the acute toxicity study after a single dose of APAP (150 mg/kg), compared with control lean mice, the DIO mice had decreased serum transaminase levels and less severe hepatocellular injury. The DIO mice also had altered expression of genes related to APAP metabolism. Chronic APAP exposure for 26 weeks did not predispose the DIO mice with NAFLD to more severe hepatotoxicity compared with the lean mice. These results suggested that the C57BL/6NTac DIO mouse model appears to be more tolerant to APAP-induced hepatotoxicity than lean mice, potentially related to altered xenobiotic metabolizing capacity in the fatty liver. Further mechanistic studies with APAP and other drugs in NAFLD animal models are necessary to investigate the mechanism of altered susceptibility to intrinsic DILI in some human NAFLD patients.
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Affiliation(s)
- Takeshi Izawa
- Comparative and Molecular Pathogenesis Branch, Division of Translational Toxicology, NIEHS, Research Triangle Park, NC, USA
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, Izumisano, Osaka, Japan
| | - Gregory S. Travlos
- Comparative and Molecular Pathogenesis Branch, Division of Translational Toxicology, NIEHS, Research Triangle Park, NC, USA
| | - Ricardo A. Cortes
- Comparative and Molecular Pathogenesis Branch, Division of Translational Toxicology, NIEHS, Research Triangle Park, NC, USA
- Experimental Pathology Laboratories, Inc., Research Triangle Park, NC, USA
| | - Natasha P. Clayton
- Comparative and Molecular Pathogenesis Branch, Division of Translational Toxicology, NIEHS, Research Triangle Park, NC, USA
| | - Robert C. Sills
- Comparative and Molecular Pathogenesis Branch, Division of Translational Toxicology, NIEHS, Research Triangle Park, NC, USA
| | - Arun R. Pandiri
- Comparative and Molecular Pathogenesis Branch, Division of Translational Toxicology, NIEHS, Research Triangle Park, NC, USA
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15
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Ito T, Tanaka T, Kiyatake I, Izawa T, Furuya M, Sasai K. Contrast-enhanced computed tomography and cross-sectional anatomy of the trunk in the brownbanded bamboo shark (Chiloscyllium punctatum). Anat Histol Embryol 2023; 52:437-447. [PMID: 36647800 DOI: 10.1111/ahe.12903] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 11/30/2022] [Accepted: 01/03/2023] [Indexed: 01/18/2023]
Abstract
Computed tomography (CT) is used in veterinary medicine for the diagnosis of bones and soft tissue diseases in various species. In addition, CT has recently been used to diagnose aquatic animals, including Selachimorpha, which are difficult to diagnose out of water. However, because Selachimorpha do not have adipose tissue in the coelomic cavity, the coelomic organs cannot be fully identified using non-contrast CT (NCCT). The aim of this study is to present the anatomical features of the cadaver, NCCT, and contrast-enhanced CT (CECT) as well as the change in CT values of the coelomic organs and musculature of the brownbanded bamboo shark. NCCT scans were performed under anaesthesia in one male and one female shark. CECT was performed 30 min after iopamidol was administered intravenously. The sharks were euthanized, frozen at -20°C, and sliced in the same position in which they were scanned. Using electric band saw, 10-mm transversal sections were obtained. The anatomical structures of both males and females were identified by transversal sections, and CT images homologous to transversal sections were then selected. Sagittal and coronal CECT images were also obtained to facilitate understanding of the location and size of coelomic organs. Although bone structure and air in organs could be sufficiently discriminated on NCCT image, the coelomic organs were almost indistinguishable. On the other hand, CECT images obtained sufficient contrast to identify most coelomic organs in addition to bone and air. The results provide an atlas of a cross-sectional anatomy and CECT images, which is useful information for the medical diagnosis of coelomic organs in live Selachimorpha.
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Affiliation(s)
| | - Toshiyuki Tanaka
- Veterinary Medical Center, Department of Veterinary Science, Osaka Metropolitan University, Osaka, Japan
| | | | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Department of Veterinary Science, Osaka Metropolitan University, Osaka, Japan
| | - Masaru Furuya
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Science, Osaka Metropolitan University, Osaka, Japan
| | - Kazumi Sasai
- Laboratory of Veterinary Internal Medicine, Department of Veterinary Science, Osaka Metropolitan University, Osaka, Japan
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16
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Fujiwara S, Izawa T, Mori M, Atarashi M, Yamate J, Kuwamura M. Dietary iron overload enhances Western diet induced hepatic inflammation and alters lipid metabolism in rats sharing similarity with human DIOS. Sci Rep 2022; 12:21414. [PMID: 36496443 PMCID: PMC9741655 DOI: 10.1038/s41598-022-25838-3] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022] Open
Abstract
Hepatic iron overload is often concurrent with nonalcoholic fatty liver disease (NAFLD). Dysmetabolic iron overload syndrome (DIOS) is characterized by an increase in the liver and body iron stores and metabolic syndrome components. Increasing evidences suggest an overlap between NAFLD with iron overload and DIOS; however, the mechanism how iron is involved in their pathogenesis remains unclear. Here we investigated the role of iron in the pathology of a rat model of NAFLD with iron overload. Rats fed a Western (high-fat and high-fructose) diet for 26 weeks represented hepatic steatosis with an increased body weight and dyslipidemia. Addition of dietary iron overload to the Western diet feeding further increased serum triglyceride and cholesterol, and enhanced hepatic inflammation; the affected liver had intense iron deposition in the sinusoidal macrophages/Kupffer cells, associated with nuclear translocation of NFκB and upregulation of Th1/M1-related cytokines. The present model would be useful to investigate the mechanism underlying the development and progression of NAFLD as well as DIOS, and to elucidate an important role of iron as one of the "multiple hits" factors.
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Affiliation(s)
- Sakura Fujiwara
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531 Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531 Japan
| | - Mutsuki Mori
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531 Japan
| | - Machi Atarashi
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531 Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531 Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Metropolitan University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531 Japan
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Abstract
Although crop domestication is a prehistoric event, DNA (or genome) sequences of modern cultivars and the accession lines of wild relatives contain information regarding the history of crop domestication and the breeding process. Accordingly, with plentiful genomic data, many new findings have been obtained concerning the crop domestication process, for which various (some controversial) interpretations exist. Since approximately 20 years ago, dozens of quantitative trait genes (QTGs) related to the domestication process have been cloned from several crops including rice, a global staple food. However, the determination of how and when these QTGs were involved in rice domestication requires a precise understanding of the DNA code. In addition to the identification of domestication-related QTGs, large-scale rice genome analysis based on short-read Illumina data (but with shallow depth) including more than 1,000 rice cultivars and hundreds of wild rice (or Oryza rufipogon) lines, along with extensive genome analysis including more than 3,000 cultivars with sufficient Illumina data, has been reported. From these data, the genome-wide changes during rice domestication have been explained. However, these genome-wide changes were not interpreted based on QTG changes for domestication-related traits during rice domestication. In addition, a substantial gap remains between the archeological hypothesis based on ancient relics and findings from DNA variations among current cultivars. Thus, this review reconsiders the present status of rice domestication research from a biologist's perspective.
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18
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Sakamoto K, Lin B, Nunomura K, Izawa T, Nakagawa S. The K-Ras(G12D)-inhibitory peptide KS-58 suppresses growth of murine CT26 colorectal cancer cell-derived tumors. Sci Rep 2022; 12:8121. [PMID: 35581303 PMCID: PMC9114382 DOI: 10.1038/s41598-022-12401-3] [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: 12/14/2021] [Accepted: 04/26/2022] [Indexed: 11/24/2022] Open
Abstract
Mutations in the cell proliferation regulator K-Ras are found with a variety of cancer types, so drugs targeting these mutant proteins could hold great clinical potential. Very recently, a drug targeting the K-Ras(G12C) mutant observed in lung cancer gained regulatory approval and several clinical trials are currently underway to examine the efficacy of this agent when combined with other drugs such as a monoclonal antibody inhibitor of programmed cell death 1 receptor (anti-PD-1). Alternatively, there are currently no approved drugs targeting K-Ras(G12D), the most common cancer-associated K-Ras mutant. In 2020, we described the development of the K-Ras(G12D) inhibitory bicyclic peptide KS-58 and presented evidence for anticancer activity against mouse xenografts derived from the human pancreatic cancer cell line PANC-1 stably expressing K-Ras(G12D). Here, we show that KS-58 also possess anticancer activity against mouse tumors derived from the colorectal cancer cell line CT26 stably expressing K-Ras(G12D). Further, KS-58 treatment reduced phosphorylation of ERK, a major downstream signaling factor in the Ras pathway, confirming that KS-58 inhibits K-Ras(G12D) function. Unexpectedly; however, KS-58 did not show additive or synergistic anticancer activity with mouse anti-PD-1. Morphological analysis and immunostaining demonstrated no obvious differences in CD8+ cells infiltration or PD-L1 expression levels in CT26-derived tumors exposed to monotherapy or combination treatment. Nonetheless, KS-58 demonstrated reasonable stability in blood (t1/2 ≈ 30 min) and no obvious systemic adverse effects, suggesting clinical potential as a lead molecule against colorectal cancer.
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Affiliation(s)
- Kotaro Sakamoto
- grid.459582.7Research & Development Department, Ichimaru Pharcos Company Limited, 318-1 Asagi, Motosu, Gifu 501-0475 Japan
| | - Bangzhong Lin
- grid.136593.b0000 0004 0373 3971Center for Supporting Drug Discovery and Life Science Research, Graduate School of Pharmaceutical Science, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871 Japan
| | - Kazuto Nunomura
- grid.136593.b0000 0004 0373 3971Center for Supporting Drug Discovery and Life Science Research, Graduate School of Pharmaceutical Science, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871 Japan
| | - Takeshi Izawa
- grid.261455.10000 0001 0676 0594Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531 Japan
| | - Shinsaku Nakagawa
- grid.136593.b0000 0004 0373 3971Center for Supporting Drug Discovery and Life Science Research, Graduate School of Pharmaceutical Science, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871 Japan ,grid.136593.b0000 0004 0373 3971Laboratory of Biopharmaceutics, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871 Japan
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19
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Pervin M, Karim MR, Kuramochi M, Izawa T, Kuwamura M, Yamate J. Possible Cytoprotection of Low Dose Lipopolysaccharide in Rat Thioacetamide-Induced Liver Lesions, Focusing on the Analyses of Hepatic Macrophages and Autophagy. Toxicol Pathol 2022; 50:353-365. [PMID: 35142238 DOI: 10.1177/01926233221076758] [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: 11/15/2022]
Abstract
Lipopolysaccharide (LPS) may influence hepatic macrophages and autophagy. We evaluated the potential participation of macrophages and autophagosomes in thioacetamide (TAA)-induced rat liver injury under pretreatment of a low dose LPS (0.1 mg/kg BW, intraperitoneally; nonhepatotoxic dose). F344 rats were pretreated with LPS (LPS + TAA) or saline (TAA alone) at 24 hours before TAA injection (100 mg/kg BW, intraperitoneally); rats were examined on Days 0 (controls), 1, 2, and 3 after TAA injection. Data were compared between TAA alone and LPS + TAA rats. LPS pretreatment significantly reduced TAA-induced hepatic lesion (centrilobular necrosis with inflammation) on Days 1 and 2, being reflected by declined hepatic enzyme values and decreased number of apoptotic cells. LC3B-immunoreacting autophagosomes (as cytoplasmic fine granules) were significantly increased on Days 1 and 2 in hepatocytes of LPS + TAA rats. In LPS + TAA rats, hepatic macrophages reacting to CD68, CD163, and MHC class II mainly on Day 2 and mRNA levels of macrophage-related factors (MCP-1, IL-1β, and IL-4) on Day 1 were significantly decreased. Collectively, the low-dose LPS pretreatment might act as cytoprotection against TAA-induced hepatotoxicity through increased autophagosomes and decreased hepatic macrophages, although the dose/time-dependent cytoprotection of LPS should be further investigated at molecular levels.
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Affiliation(s)
- Munmun Pervin
- Osaka Prefecture University, Osaka, Japan.,Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Mohammad Rabiul Karim
- Osaka Prefecture University, Osaka, Japan.,Bangladesh Agricultural University, Mymensingh, Bangladesh
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20
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Yoshioka H, Kimura K, Ogo Y, Ohtsuki N, Nishizawa-Yokoi A, Itoh H, Toki S, Izawa T. Real-Time Monitoring of Key Gene Products Involved in Rice Photoperiodic Flowering. Front Plant Sci 2021; 12:766450. [PMID: 34975949 PMCID: PMC8715009 DOI: 10.3389/fpls.2021.766450] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 11/15/2021] [Indexed: 06/14/2023]
Abstract
Flowering is an important biological process through which plants determine the timing of reproduction. In rice, florigen mRNA is induced more strongly when the day length is shorter than the critical day length through recognition of 30-min differences in the photoperiod. Grain number, plant height, and heading date 7 (Ghd7), which encodes a CCT-domain protein unique to monocots, has been identified as a key floral repressor in rice, and Heading date 1 (Hd1), a rice ortholog of the Arabidopsis floral activator CONSTANS (CO), is another key floral regulator gene. The Hd1 gene product has been shown to interact with the Ghd7 gene product to form a strong floral repressor complex under long-day conditions. However, the mRNA dynamics of these genes cannot explain the day-length responses of their downstream genes. Thus, a real-time monitoring system of these key gene products is needed to elucidate the molecular mechanisms underlying accurate photoperiod recognition in rice. Here, we developed a monitoring system using luciferase (LUC) fusion protein lines derived from the Ghd7-LUC and Hd1-LUC genes. We successfully obtained a functionally complemented gene-targeted line for Ghd7-LUC. Using this system, we found that the Ghd7-LUC protein begins to accumulate rapidly after dawn and reaches its peak more rapidly under a short-day condition than under a long-day condition. Our system provides a powerful tool for revealing the accurate time-keeping regulation system incorporating these key gene products involved in rice photoperiodic flowering.
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Affiliation(s)
- Hayato Yoshioka
- Laboratory of Plant Breeding and Genetics, Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Keiko Kimura
- Laboratory of Plant Breeding and Genetics, Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Yuko Ogo
- Institute of Crop Science, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Namie Ohtsuki
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Japan
| | - Ayako Nishizawa-Yokoi
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Japan
| | - Hironori Itoh
- Institute of Crop Science, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Seiichi Toki
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Japan
- Graduate School of Nanobioscience, Yokohama City University, Yokohama, Japan
| | - Takeshi Izawa
- Laboratory of Plant Breeding and Genetics, Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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21
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Kaneguchi A, Izawa T, Tanaka M, Suzuki H, Tani H, Kuwamura M, Yamate J. Systemic Anaplastic Large T-Cell Lymphoma with Initial Presentation of Dysuria in a Dog. J Comp Pathol 2021; 189:26-30. [PMID: 34886983 DOI: 10.1016/j.jcpa.2021.09.006] [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: 04/08/2021] [Revised: 08/20/2021] [Accepted: 09/26/2021] [Indexed: 10/20/2022]
Abstract
A 6-year-old spayed female Akita Dog had dysuria, severe urinary retention and miliary masses in the vagina. Computed tomography revealed a mass at the urethrovaginal junction. The dog died 2 months after initial presentation. At necropsy, the urethrovaginal mass was greyish‒white, solid and 9 × 6 × 6 cm in size with circumferential thickening of the urethral wall. Multiple whitish nodules were seen in the visceral organs and skin. Histopathologically, the urethrovaginal mass comprised a diffuse population of medium-sized to large round neoplastic cells with ovoid to bean-shaped nuclei and eosinophilic cytoplasm. Aberrantly large neoplastic cells with eccentric, horseshoe-shaped or irregularly-shaped nuclei and abundant eosinophilic cytoplasm resembled 'hallmark cells' of human anaplastic large cell lymphoma. Similar neoplastic lesions were present in all the grossly visible masses. Neoplastic cells were diffusely immunopositive for CD3 and occasionally for CD30 and granzyme B. On the basis of the clinical, pathological and immunohistochemical findings, the case was diagnosed as systemic anaplastic large cell lymphoma arising from the lower urinary tract.
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Affiliation(s)
- Ayumi Kaneguchi
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Japan.
| | - Miyuu Tanaka
- Veterinary Medical Center, Osaka Prefecture University, Izumisano, Japan
| | | | - Hiroyuki Tani
- Veterinary Internal Medicine, Osaka Prefecture University, Izumisano, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Japan
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Nagalla AD, Nishide N, Hibara KI, Izawa T. High Ambient Temperatures Inhibit Ghd7-Mediated Flowering Repression in Rice. Plant Cell Physiol 2021; 62:1745-1759. [PMID: 34498083 DOI: 10.1093/pcp/pcab129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 08/13/2021] [Accepted: 08/22/2021] [Indexed: 06/13/2023]
Abstract
The anticipation of changing seasons is crucial for reproduction in plants. Despite the broad cultivation area, the effects of ambient temperature on photoperiodic flowering are largely unknown in rice. Here, we first examined flowering time under four distinct conditions: short-day or long-day and high or low temperature, using cultivars, nearly isogenic lines, and mutants in rice. We also examined gene expression patterns of key flowering-time genes using the same lines under various conditions including temporal dynamics after light pulses. In addition to delayed flowering because of low growth rates, we found that photoperiodic flowering is clearly enhanced by both Hd1 and Ghd7 genes under low-temperature conditions in rice. We also revealed that PhyB can control Ghd7 repressor activity as a temperature sensor to inhibit Ehd1, Hd3a and RFT1 at lower temperatures, likely through a post-transcriptional regulation, despite inductive photoperiod conditions. Furthermore, we found that rapid reduction of Ghd7 messenger RNA (mRNA) under high-temperature conditions can lead to mRNA increase in a rice florigen gene, RFT1. Thus, multiple temperature-sensing mechanisms can affect photoperiodic flowering in rice. The rising of ambient temperatures in early summer likely contributes to the inhibition of Ghd7 repressor activity, resulting in the appropriate floral induction of rice in temperate climates.
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Affiliation(s)
- Asanga Deshappriya Nagalla
- Laboratory of Plant Breeding and Genetics, Department of Agricultural and Environmental Biology, The University of Tokyo, Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - Noriko Nishide
- Laboratory of Plant Breeding and Genetics, Department of Agricultural and Environmental Biology, The University of Tokyo, Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - Ken-Ichiro Hibara
- Laboratory of Plant Breeding and Genetics, Department of Agricultural and Environmental Biology, The University of Tokyo, Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - Takeshi Izawa
- Laboratory of Plant Breeding and Genetics, Department of Agricultural and Environmental Biology, The University of Tokyo, Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
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Hasan MM, Konishi S, Tanaka M, Izawa T, Yamate J, Kuwamura M. Expression of CCDC85C, a causative protein for hydrocephalus, and intermediate filament proteins during lateral ventricle development in rats. Exp Anim 2021; 71:100-108. [PMID: 34657927 PMCID: PMC8828401 DOI: 10.1538/expanim.21-0132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Coiled-coil domain containing 85c (Ccdc85c) is a causative gene for genetic hydrocephalus and subcortical heterotopia with frequent brain hemorrhage. In the present study,
we examined the expression pattern of CCDC85C protein and intermediate filament proteins, such as nestin, vimentin, GFAP, and cytokeratin AE1/AE3, during lateral ventricle development in
rats. CCDC85C was expressed in the neuroepithelial cells of the dorsal lateral ventricle wall, diminishing with development and almost disappearing at postnatal day 20. By immunoelectron
microscopy, CCDC85C was localized in the cell-cell junction and apical membrane. The expression of nestin and vimentin was decreased in the wall of the lateral ventricle in manner similar to
CCDC85C, but GFAP expression started immediately after birth and became stronger with age. Moreover, cytokeratin expression was found at postnatal day 13 and increased at postnatal day 20 in
conjunction with the disappearance of CCDC85C expression. Taken together, CCDC85C is expressed in the cell-cell junctions lining the wall of the lateral ventricle and plays a role in neural
development with other intermediate filaments in the embryonic and postnatal periods. Our chronological study will help to relate CCDC85C protein with intermediate filaments to elucidate the
detailed role of CCDC85C protein during neurogenesis.
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Affiliation(s)
- Md Mehedi Hasan
- Laboratory of Veterinary Pathology, Osaka Prefecture University
| | - Shizuka Konishi
- Laboratory of Veterinary Pathology, Osaka Prefecture University
| | - Miyuu Tanaka
- Laboratory of Veterinary Pathology, Osaka Prefecture University
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Prefecture University
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Prefecture University
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24
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Numakura Y, Uemura R, Tanaka M, Izawa T, Yamate J, Kuramoto T, Kaneko T, Mashimo T, Yamamoto T, Serikawa T, Kuwamura M. PHF24 is expressed in the inhibitory interneurons in rats. Exp Anim 2021; 70:137-143. [PMID: 33115988 PMCID: PMC7887615 DOI: 10.1538/expanim.20-0105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/29/2020] [Indexed: 11/20/2022] Open
Abstract
Noda epileptic rat (NER) is a mutant model for epilepsy that exhibits spontaneous generalized tonic-clonic seizure. Epileptogenesis of NER remains to be elucidated; but it is detected an insertion of an endogenous retrovirus sequence in intron 2 of the PHD finger protein 24 (Phf24) gene, encoding Gαi-interacting protein (GINIP). Phf24 is a strong candidate gene for epileptogenesis in NER. PHF24 modulates GABAB signaling through interacting with Gαi protein. To clarify the epileptogenesis of NER, we investigated a distribution of PHF24-expressing cells in the central nerve system (CNS). While broad expression of PHF24 was observed in the CNS, characteristic expression was noted in the periglomerular layer of the olfactory bulb and the lamina II of the spinal cord in the control rats. These cells showed co-expression with calbindin or calretinin, inhibitory interneuron markers. In the olfactory bulb, 15.6% and 41.2% of PHF24-positive neurons co-expressed calbindin and calretinin, respectively. Immunoelectron microscopy revealed that PHF24 was located in the presynaptic terminals, synaptic membranes and cytoplasmic matrix of neuronal soma. Our data suggested PHF24 is expressed in the inhibitory interneurons and may play important roles in modulation of the GABAB signaling.
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Affiliation(s)
- Yuki Numakura
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58 Ourai-kita, Izumisano, Osaka 598-8531, Japan
| | - Risa Uemura
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58 Ourai-kita, Izumisano, Osaka 598-8531, Japan
| | - Miyuu Tanaka
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58 Ourai-kita, Izumisano, Osaka 598-8531, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58 Ourai-kita, Izumisano, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58 Ourai-kita, Izumisano, Osaka 598-8531, Japan
| | - Takashi Kuramoto
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Yoshidakonoe-cho, Sakyo-ku, Kyoto 606-8501, Japan
- Department of Animal Science, Faculty of Agriculture, Tokyo University of Agriculture, 1737 Funako, Atsugi, Kanagawa 243-0034, Japan
| | - Takehito Kaneko
- Laboratory of Animal Reproduction and Development, Graduate School of Science and Engineering, Iwate University, 4-35 Ueda, Morioka-shi, Iwate 020-8551, Japan
| | - Tomoji Mashimo
- Division of Animal Genetics, Laboratory Animal Research Center, Institute of Medical Science, the University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
| | - Takashi Yamamoto
- Molecular Genetics Laboratory, Graduate School of Integrated Sciences for Life, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Tadao Serikawa
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Yoshidakonoe-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58 Ourai-kita, Izumisano, Osaka 598-8531, Japan
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25
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Nakagawa M, Karim MR, Izawa T, Kuwamura M, Yamate J. Immunophenotypical Characterization of M1/M2 Macrophages and Lymphocytes in Cisplatin-Induced Rat Progressive Renal Fibrosis. Cells 2021; 10:257. [PMID: 33525592 PMCID: PMC7911194 DOI: 10.3390/cells10020257] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/26/2021] [Accepted: 01/26/2021] [Indexed: 02/06/2023] Open
Abstract
Renal fibrosis is regarded as the common final pathway leading to chronic kidney diseases; macrophages and myofibroblasts play important roles in the development of fibrosis. F344 rats were injected once with cisplatin (CDDP; 6 mg/kg BW) for renal lesions. Here, immunophenotypical characteristics of macrophages and lymphocytes in CDDP-induced rat renal lesions were investigated histopathologically; the CDDP-induced renal lesions consisted of tissue damage at the early-stage, worsen the damage and commencement of interstitial fibrosis at the mid-stage, and progressive fibrosis at the late stage; the KIM-1 expression and α-SMA+ myofibroblast area reflected renal tubular damage/abnormal regeneration and renal interstitial fibrosis, respectively. CD68+ M1 macrophages began to increase at the mid-stage, with increased mRNA expressions of M1-related cytokines (INF-γ, TNF-α and IL-6), and then slightly decreased at the late-stage. CD163+ M2 macrophages showed a gradually increased number at the mid- and late-stages, accompanied by increased TGF-β1 mRNA expression (a fibrogenic factor). Double immunofluorescence using fibrotic samples at the late-stage revealed that 62.0-78.0% of CD68+ M1 macrophages co-expressed CD163, indicating that M1/M2 macrophages may contribute to progressive renal fibrosis in cooperation; further, MHC class II-expressing macrophages had a tendency towards M1 polarization, whereas CD204-expressing macrophages towards M2 polarization. In addition, CD4+ and CD8+ T cells were increased at the late-stage. Collectively, progressive renal interstitial fibrosis may be developed by complicated mechanisms that arose via interaction of M1/M2 macrophages (inflammatory for M1 and anti-inflammatory for M2) and T cells reacting to CD4 (for helper) and CD8 (for cytotoxicity). This study would provide some information on the pathogenesis of renal fibrosis based on inflammatory cells.
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Affiliation(s)
- Minto Nakagawa
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan; (M.N.); (M.R.K.); (T.I.); (M.K.)
| | - Mohammad Rabiul Karim
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan; (M.N.); (M.R.K.); (T.I.); (M.K.)
- Department of Anatomy and Histology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan; (M.N.); (M.R.K.); (T.I.); (M.K.)
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan; (M.N.); (M.R.K.); (T.I.); (M.K.)
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan; (M.N.); (M.R.K.); (T.I.); (M.K.)
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26
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Koga M, Karim MR, Kuramochi M, Izawa T, Kuwamura M, Yamate J. Appearance of Heterogeneous Macrophages During Development of Isoproterenol-Induced Rat Myocardial Fibrosis. Toxicol Pathol 2021; 49:1048-1061. [PMID: 33397220 DOI: 10.1177/0192623320982526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Macrophages appearing in lesions are polarized toward M1 (for inflammation) and M2 (for anti-inflammation/fibrosis) types. We analyzed immunophenotypes of macrophages appearing in myocardial lesion in rats injected once with isoproterenol (10 mg/kg body weight). Inflammation following myocardial necrosis on day 1 was seen with a peak on days 3 and 5, and thereafter, reparative fibrosis developed on days 7 to 28. CD68+ M1 macrophages were seen in the early stages of injury and inflammatory on days 1 to 7, and thereafter, CD163+ M2 macrophages increased in the late stages of fibrosis on days 7 to 28. There was the polarization of M1 and M2 macrophages. The kinetics of macrophages reacting to Iba-1 and Galectin-3 was similar to that of M1 macrophages, indicating that Iba1- and Gal-3-positive macrophages might have functions of M1 type. Double immunofluorescence revealed that CD204- and MHC class II-positive macrophages are polarized toward M1 and M2 types, respectively. CCR2 messenger RNA expression is transiently elevated on day 1. Since CCR2 is a marker of blood monocytes, M1 macrophages might be recruited from blood monocytes. Collectively, macrophages expressing heterogeneous immunophenotypes participate in myocardial fibrosis. These findings would be useful for understanding the pathogenesis of myocardial fibrosis and analyzing myocardial toxicity.
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Affiliation(s)
- Masaaki Koga
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, 194887Osaka Prefecture University, Izumisano City, Osaka, Japan.,26369Nippon Shinyaku Co. Ltd., Minami-ku, Kyoto Japan
| | - Mohammad Rabiul Karim
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, 194887Osaka Prefecture University, Izumisano City, Osaka, Japan.,Department of Anatomy and Histology, Faculty of Veterinary Science, 194887Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Mizuki Kuramochi
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, 194887Osaka Prefecture University, Izumisano City, Osaka, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, 194887Osaka Prefecture University, Izumisano City, Osaka, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, 194887Osaka Prefecture University, Izumisano City, Osaka, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, 194887Osaka Prefecture University, Izumisano City, Osaka, Japan
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27
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Izawa T. What is going on with the hormonal control of flowering in plants? Plant J 2021; 105:431-445. [PMID: 33111430 DOI: 10.1111/tpj.15036] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/17/2020] [Accepted: 09/01/2020] [Indexed: 05/12/2023]
Abstract
Molecular genetic studies using Arabidopsis thaliana as a model system have overwhelmingly revealed many important molecular mechanisms underlying the control of various biological events, including floral induction in plants. The major genetic pathways of flowering have been characterized in-depth, and include the photoperiod, vernalization, autonomous and gibberellin pathways. In recent years, novel flowering pathways are increasingly being identified. These include age, thermosensory, sugar, stress and hormonal signals to control floral transition. Among them, hormonal control of flowering except the gibberellin pathway is not formally considered a major flowering pathway per se, due to relatively weak and often pleiotropic genetic effects, complex phenotypic variations, including some controversial ones. However, a number of recent studies have suggested that various stress signals may be mediated by hormonal regulation of flowering. In view of molecular diversity in plant kingdoms, this review begins with an assessment of photoperiodic flowering, not in A. thaliana, but in rice (Oryza sativa); rice is a staple crop for human consumption worldwide, and is a model system of short-day plants, cereals and breeding crops. The rice flowering pathway is then compared with that of A. thaliana. This review then aims to update our knowledge on hormonal control of flowering, and integrate it into the entire flowering gene network.
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Affiliation(s)
- Takeshi Izawa
- Laboratory of Plant Breeding & Genetics, Department of Agricultural and Environmental Biology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-Ku, Tokyo, 113-8657, Japan
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28
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Inai Y, Izawa T, Mori M, Atarashi M, Tsuchiya S, Kuwamura M, Yamate J. Analyses of hemorrhagic diathesis in high-iron diet-fed rats. J Toxicol Pathol 2021; 34:33-41. [PMID: 33627943 PMCID: PMC7890162 DOI: 10.1293/tox.2020-0004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 09/29/2020] [Indexed: 11/19/2022] Open
Abstract
Iron overload has been well recognized to cause oxidant-mediated cellular/tissue injury; however, little is known about the effects of iron overload on the blood coagulation system. We encountered an unexpected bleeding tendency in rats fed a high-iron diet in a set of studies using iron-modified diets. In this study, we investigated the mechanism of hemorrhagic diathesis induced by dietary iron overload in rats. Six-week-old F344/DuCrlCrlj male rats were fed a standard (containing 0.02% iron) or a high-iron diet (containing 1% iron) for 6 weeks and were then sampled for hematological, blood biochemical, coagulation, and pathological examinations. Serum and liver iron levels increased in rats fed the high-iron diet (Fe group) and serum transferrin was almost saturated with iron. However, serum transaminase levels did not increase. Moreover, plasma prothrombin time and activated partial thromboplastin time were significantly prolonged, regardless of the presence of hemorrhage. The activity of clotting factors II and VII (vitamin K-dependent coagulation factors) decreased significantly, whereas that of factor VIII was unaltered. Blood platelet levels were not influenced by dietary iron overload, suggesting that the bleeding tendency in iron-overloaded rats is caused by secondary hemostasis impairment. In addition, hemorrhage was observed in multiple organs in rats fed diets containing more than 0.8% iron. Our results suggest that iron overload can increase the susceptibility of coagulation abnormalities caused by latent vitamin K insufficiency.
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Affiliation(s)
- Yohei Inai
- Laboratory of Veterinary Pathology, Osaka Prefecture
University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Prefecture
University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Mutsuki Mori
- Laboratory of Veterinary Pathology, Osaka Prefecture
University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Machi Atarashi
- Laboratory of Veterinary Pathology, Osaka Prefecture
University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Seiichirou Tsuchiya
- Sysmex Corporation, 4-4-4 Takatsukadai, Nishiku, Kobe, Hyogo
651-2271, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Prefecture
University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Prefecture
University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531, Japan
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29
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Rahman N, Kuramochi M, Izawa T, Kuwamura M, Yamate J. Characterization of Immature Myofibroblasts of Stellate Cell or Mesenchymal Cell Origin in D-Galactosamine-Induced Liver Injury in Rats. Vet Pathol 2021; 58:80-90. [PMID: 33054583 DOI: 10.1177/0300985820963097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Lesions of D-galactosamine (D-GalN)-induced hepatotoxicity resemble those of human acute viral hepatitis. This study investigated hepatic mesenchymal cells including hepatic stellate cells (HSCs) and myofibroblasts in D-GalN-induced hepatotoxicity. Rats, injected with D-GalN (800 mg/kg body weight, once, intraperitoneally) were examined on post single injection (PSI) at 8 hours and days 1 to 5. Lesions consisting of hepatocyte necrosis and reparative fibrosis were present diffusely or focally within the hepatic lobules on PSI days 1 and 2, and then the injury recovered on PSI days 3 and 5. Myofibroblasts expressing vimentin, desmin, and α-smooth muscle actin (α-SMA) were present in the lesions. Double immunofluorescence showed that myofibroblasts reacted simultaneously to vimentin/α-SMA, desmin/α-SMA, and desmin/vimentin; furthermore, myofibroblasts reacting to vimentin, desmin, and α-SMA also co-expressed glial fibrillary acidic protein (GFAP), a marker of HSCs. Additionally, GFAP-expressing myofibroblasts reacted to nestin and A3 (both are markers of immature mesenchymal cells). Cells reacting to Thy-1, a marker for immature mesenchymal cells, also appeared in fibrotic lesions. In agreement with the myofibroblastic appearance, mRNAs of fibrosis-related factors (TGF-β1, PDGF-β, TNF-α, Timp2, and Mmp2) increased mainly on PSI days 1 and 2. Myofibroblasts with expression of various cytoskeletal proteins were present in diffuse or focal hepatic lesions, and they might be derived partly from immature HSCs and from immature mesenchymal cells.
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Affiliation(s)
- Nahid Rahman
- 13311Osaka Prefecture University, Izumisano City, Osaka, Japan
| | | | - Takeshi Izawa
- 13311Osaka Prefecture University, Izumisano City, Osaka, Japan
| | | | - Jyoji Yamate
- 13311Osaka Prefecture University, Izumisano City, Osaka, Japan
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30
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Harada N, Minami Y, Hanada K, Hanaoka R, Kobayashi Y, Izawa T, Sato T, Kato S, Inui H, Yamaji R. Relationship between gut environment, feces-to-food ratio, and androgen deficiency-induced metabolic disorders. Gut Microbes 2020; 12:1817719. [PMID: 32991827 PMCID: PMC7781658 DOI: 10.1080/19490976.2020.1817719] [Citation(s) in RCA: 8] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Androgen action generates sex-related differences that include changes in the gut microbiota composition. Hypoandrogenism and hyperandrogenism in males and females, respectively, are associated with the prevalence of metabolic disorders. Our recent work showed that male androgen receptor knockout (ARKO) mice developed high-fat diet (HFD)-dependent sarcopenic abdominal obesity, hyperglycemia, and hepatic steatosis, leading to early death. The ARKO mice also exhibited alterations in intestinal microbiota but did not experience metabolic abnormalities when administered with antibiotics. Here, we show that time-dependent changes in feed efficiency (ratio of body weight gain to food intake) and weight of dried feces-to-food ratio could be good markers for changes in gut microbiota. Turicibacter spp., Lactobacillus spp., and L. reuteri increased in the gut in both HFD-fed ARKO and castrated mice having metabolic abnormalities. HFD-fed ARKO mice showed increased plasma levels of aspartate, but not alanine, aminotransferase. Changes in the gut microbiome appear to provoke androgen deficiency-induced metabolic diseases, leading to early mortality.
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Affiliation(s)
- Naoki Harada
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan,CONTACT Naoki Harada Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka599-8531, Japan
| | - Yukari Minami
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Kazuki Hanada
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Ryo Hanaoka
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Yasuyuki Kobayashi
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Takeshi Izawa
- Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Takashi Sato
- Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Japan
| | - Shigeaki Kato
- Graduate School of Science and Engineering, Iryo Sosei University, Fukushima, Japan
| | - Hiroshi Inui
- Division of Clinical Nutrition, Graduate School of Comprehensive Rehabilitation, Osaka Prefecture University, Osaka, Japan
| | - Ryoichi Yamaji
- Division of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
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31
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Minakawa T, Shumoto G, Kezuka C, Izawa T, Sasaki K, Yamaguchi S, Kamezaki N, Yamate J, Konno T, Sano A, Itano EN, Wada S, Willson C, Ueda K. Seroprevalence of Antibodies Against Paracoccidioides Spp. in Captive Dolphins from Three Aquaria in Japan. Mycopathologia 2020; 185:1013-1020. [PMID: 33118124 DOI: 10.1007/s11046-020-00501-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 10/21/2020] [Indexed: 11/28/2022]
Abstract
The skin disease paracoccidioidomycosis ceti occurs in several dolphin species globally. Infection by the unculturable fungi Paracoccidioides brasilensis or other Paracoccidioides spp. results in chronic cutaneous and granulomatous lesions. In this study we used immunohistochemistry to investigate the seroprevalence of antibodies to Paracoccidioides spp. in captive dolphins from three aquaria in Japan. We had previously reported that there were serological cross-reactions for Paracoccidioides spp. with related species in the order Onygenales. We hypothesized that the degree of serological cross-reactions for Paracoccidioides spp. might be lower in areas, such as Japan, where the fungal diseases coccidiodomycosis and paracoccidiodomycosis are not endemic. Sera from 41 apparently healthy dolphins, including 20 Atlantic bottlenose dolphins (BD: Tursiops truncatus), 6 Indo-Pacific bottlenose dolphins (IPBD: Tursiops aduncus), 2 F1 generation of a cross between BD and IPBD (F1), 3 Pacific white-sided dolphins (PWD: Lagenorhynchus obliquidens), 2 pantropical spotted dolphins (PSD: Stenella attenuata), 6 false killer whales (FKW: Pseudorca crassidens), and 2 rough-toothed dolphins (RTD: Steno bredanensis) were investigated. Sera from three dolphins with paracoccidioidomycosis ceti were used as a positive control. The yeast-form cells of Paracoccidioides spp. in the cutaneous tissue sample derived from the first Japanese paracoccidioidomycosis ceti case were used as the antigen for the immunohistochemistry. Of the 41 dolphins tested, 61.0% had antibodies against Paracoccidioides spp. This indicates that dolphins of several species in Japanese aquaria have likely been exposed to the pathogen Paracoccidioides spp.
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Affiliation(s)
- Tomoko Minakawa
- Okinawa Churashima Foundation, Kunigami-Gun, Aza Ishikawa 888, Motobu-Cho, Okinawa, 905-0206, Japan
| | - Godai Shumoto
- Ryukyu Animal Medical Center, Yone 5-24, Tomigusuku, Okinawa, 901-0224, Japan.,The United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890-0065, Japan
| | - Chiho Kezuka
- Suma Aqualife Park, Wakamiya-Cho 1-3-5, Suma-Ku, Kobe, Hyogo, 654-0049, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Division of Veterinary Sciences, Rinku-Campus, Osaka Prefecture University, Rinku-OraiKita 1-58, Izumisano, Osaka, 598-8531, Japan
| | - Kyoko Sasaki
- Chiran Meat Inspection Center, Kagoshima Prefecture, 22216-1 Minamibeppu Chiran-Cho Minamikyushu-Shi, Kagoshima, 891-0912, Japan
| | - Sayaka Yamaguchi
- Department of Dermatology, Faculty of Medicine, University of the Ryukyus, Uehara, Nakagusuku-Gun, Nishihara, Okinawa, 903-0215, Japan
| | - Naoki Kamezaki
- Suma Aqualife Park, Wakamiya-Cho 1-3-5, Suma-Ku, Kobe, Hyogo, 654-0049, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Division of Veterinary Sciences, Rinku-Campus, Osaka Prefecture University, Rinku-OraiKita 1-58, Izumisano, Osaka, 598-8531, Japan
| | - Toshihiro Konno
- The United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890-0065, Japan.,Tropical Bioresources Research Center, University of the Ryukyus, Sembaru 1, Nakagusuku-Gun, Nishihara-Cho, Okinawa, 903-0213, Japan.,Faculty of Agriculture, University of the Ryukyus, Sembaru 1, Nakagusuku-Gun, Nishihara-Cho, Okinawa, 903-0213, Japan
| | - Ayako Sano
- Ryukyu Animal Medical Center, Yone 5-24, Tomigusuku, Okinawa, 901-0224, Japan.,The United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890-0065, Japan.,Tropical Bioresources Research Center, University of the Ryukyus, Sembaru 1, Nakagusuku-Gun, Nishihara-Cho, Okinawa, 903-0213, Japan.,Faculty of Agriculture, University of the Ryukyus, Sembaru 1, Nakagusuku-Gun, Nishihara-Cho, Okinawa, 903-0213, Japan
| | - Eiko Nakagawa Itano
- Department of Pathological Science, CCB, State University of Londrina, P.O. Box 6001, Londrina, PR, 86051-970, Brazil
| | - Shinpei Wada
- Laboratory of Aquatic Medicine, School of Veterinary Medicine, Nippon Veterinary and Life Science University, Kyonan-Cho 1-7-1, Musashino, Tokyo, 180-8602, Japan
| | - Chris Willson
- College of International Studies, Meio University, 1220-1 Biimata, Nago, Okinawa, 905-8585, Japan
| | - Keiichi Ueda
- Okinawa Churashima Foundation, Kunigami-Gun, Aza Ishikawa 888, Motobu-Cho, Okinawa, 905-0206, Japan.
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Hada N, Kuramochi M, Izawa T, Kuwamura M, Yamate J. Effects of dexamethasone on hepatic macrophages in normal livers and thioacetamide-induced acute liver lesions in rats. J Toxicol Pathol 2020; 33:237-246. [PMID: 33239842 PMCID: PMC7677630 DOI: 10.1293/tox.2020-0016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 07/07/2020] [Indexed: 12/27/2022] Open
Abstract
Resident and infiltrative macrophages play important roles in the development of
pathological lesions. M1/M2 macrophage polarization with respective CD68 and CD163
expression remains unclear in chemically induced liver injury. This study was aimed at
investigating the influence of macrophages on normal and chemically induced liver injury.
For this, dexamethasone (DX), an immunosuppressive drug, was administered in normal rats
and thioacetamide (TAA)-treated rats. Liver samples were collected and analyzed with
immunohistochemical methods. Repeated injections of DX (0.5 or 1.0 mg/kg BW) for 3, 7 and
11 days reduced the number of CD163 positive hepatic resident macrophages (Kupffer cells)
in normal livers, while increasing AST and ALT levels. In TAA (300 mg/kg BW)-treated rats
injected with DX (0.5 mg/kg BW) pretreatment, the number of M1 and M2 macrophages showed a
significant decrease compared with that of TAA-treated rats without DX treatment.
Additionally, reparative fibrosis resulting from hepatocyte injury induced by TAA
injection was suppressed by DX pretreatment. Our data suggested that macrophages could
influence not only normal hepatic homeostasis (reflected by AST and ALT levels) but also
chemically induced hepatic lesion development (reduced reparative fibrosis).
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Affiliation(s)
- Noa Hada
- Veterinary Pathology, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan
| | - Mizuki Kuramochi
- Veterinary Pathology, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan
| | - Takeshi Izawa
- Veterinary Pathology, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan
| | - Mitsuru Kuwamura
- Veterinary Pathology, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Veterinary Pathology, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano City, Osaka 598-8531, Japan
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Katou-Ichikawa C, Nishina H, Tanaka M, Takenaka S, Izawa T, Kuwamura M, Yamate J. Participation of Somatic Stem Cells, Labeled by a Unique Antibody (A3) Recognizing both N-glycan and Peptide, to Hair Follicle Cycle and Cutaneous Wound Healing in Rats. Int J Mol Sci 2020; 21:ijms21113806. [PMID: 32471256 PMCID: PMC7312608 DOI: 10.3390/ijms21113806] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 05/25/2020] [Indexed: 11/16/2022] Open
Abstract
A monoclonal antibody (A3) was generated by using rat malignant fibrous histiocytoma (MFH) cells as the antigen. Generally, MFH is considered to be a sarcoma derived from undifferentiated mesenchymal cells. Molecular biological analyses using the lysate of rat MFH cells revealed that A3 is a conformation specific antibody recognizing both N-glycan and peptide. A3-labeled cells in bone marrow were regarded as somatic stem cells, because the cells partly coexpressed CD90 and CD105 (both immature mesenchymal markers). In the hair follicle cycle, particularly the anagen, the immature epithelial cells (suprabasal cells) near the bulge and some immature mesenchymal cells in the disassembling dermal papilla and regenerating connective tissue sheath/hair papilla reacted to A3. In the cutaneous wound-healing process, A3-labeled epithelial cells participated in re-epithelialization in the wound bed, and apparently, the labeled cells were derived from the hair bulge; in addition, A3-labeled immature mesenchymal cells in the connective tissue sheath of hair follicles at the wound edge showed the expansion of the A3 immunolabeling. A3-labeled immature epithelial and mesenchymal cells contributed to morphogenesis in the hair cycle and tissue repair after a cutaneous wound. A3 could become a unique antibody to identify somatic stem cells capable of differentiating both epithelial and mesenchymal cells in rat tissues.
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Affiliation(s)
- Chisa Katou-Ichikawa
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano City, Osaka 598-0048, Japan; (C.K.-I.); (H.N.); (M.T.); (T.I.); (M.K.)
| | - Hironobu Nishina
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano City, Osaka 598-0048, Japan; (C.K.-I.); (H.N.); (M.T.); (T.I.); (M.K.)
| | - Miyuu Tanaka
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano City, Osaka 598-0048, Japan; (C.K.-I.); (H.N.); (M.T.); (T.I.); (M.K.)
| | - Shigeo Takenaka
- Department of Clinical Nutrition, Osaka Prefecture University, Habikino City, Osaka 583-8555, Japan;
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano City, Osaka 598-0048, Japan; (C.K.-I.); (H.N.); (M.T.); (T.I.); (M.K.)
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano City, Osaka 598-0048, Japan; (C.K.-I.); (H.N.); (M.T.); (T.I.); (M.K.)
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano City, Osaka 598-0048, Japan; (C.K.-I.); (H.N.); (M.T.); (T.I.); (M.K.)
- Correspondence:
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Takami Y, Izawa T, Tanaka M, Hatoya S, Nabetani T, Yamate J, Kuwamura M. Hepatocellular necrosis with prominent regenerative reactions in a zonisamide administrated dog. J Vet Med Sci 2020; 82:704-706. [PMID: 32249255 PMCID: PMC7324810 DOI: 10.1292/jvms.20-0045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 16 years old neutered male Miniature Dachshund with 1-year history of repetitive
administration of zonisamide for treatment of epileptic seizure was presented for
vomiting, anorexia and diarrhea. Serum biochemistry showed a markedly elevated ALP level.
The dog died 6 days after the presentation and a necropsy was performed.
Histopathologically, random, focal to extensive necrosis, formation of regenerative
hepatocellular nodules surrounded by fibrous septa and proliferation of bile ducts were
seen in the liver. From these findings, the hepatic lesion was diagnosed as hepatocellular
necrosis with prominent regenerative reactions due to the chronic persistent liver injury.
Hepatic lesions were considered to be induced by zonisamide, based on the history of
continuous administration, and clinical and histopathological findings.
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Affiliation(s)
- Yuki Takami
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Miyuu Tanaka
- Veterinary Medical Center, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Shingo Hatoya
- Laboratory of Cell Pathobiology, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Tomoyo Nabetani
- Veterinary Medical Center, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
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Morita C, Tanaka M, Noguchi S, Shimamura S, Wada Y, Izawa T, Yamate J, Kuwamura M. An aortic body carcinoma with sarcomatoid morphology and chondroid metaplasia in a French Bulldog. J Vet Med Sci 2020; 82:576-579. [PMID: 32161252 PMCID: PMC7273586 DOI: 10.1292/jvms.20-0016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
An 11-year-old female French Bulldog was presented with a mass at the base of the heart, detected by X-ray and echocardiography. Clinical abnormality included abdominal retention by
ascites. Radiation therapy was performed for 5 weeks. The mass volume didn’t change during the radiotherapy. The condition became worse and the dog died 6 months after the initial
presentation and necropsy was performed. Grossly, the mass, 12.5 × 6.5 × 6.0 cm in size, was found at the base of the heart. Histopathological examination revealed that cardiac mass was
composed of alveolar, bundle and diffuse proliferation of neoplastic cells. Most of the neoplastic cells showed a spindle morphology; in some areas small round or polyhedral neoplastic cells
were observed. Occasional cartilage metaplasia was seen multifocal in the mass, and it was surrounded by the sarcomatoid proliferation. Electron microscopy revealed a few neuroendocrine
granules in the cytoplasm of spindle and polyhedral neoplastic cells. Metastatic cells in the lungs which had not irradiated demonstrated typical morphology of aortic body tumors. Based on
these findings, the case was diagnosed as an aortic body carcinoma with sarcomatoid morphology and chondroid metaplasia.
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Affiliation(s)
- Chiaki Morita
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Miyuu Tanaka
- Veterinary Medical Center, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Shunsuke Noguchi
- Veterinary Medical Center, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Shunsuke Shimamura
- Veterinary Medical Center, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Yusuke Wada
- Veterinary Medical Center, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
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Nishina H, Katou-Ichikawa C, Kuramochi M, Izawa T, Kuwamura M, Yamate J. Participation of Somatic Stem Cells, Recognized by a Unique A3 Antibody, in Mucosal Epithelial Regeneration in Dextran Sulfate Sodium (DSS)-Induced Rat Colonic Lesions. Toxicol Pathol 2020; 48:560-569. [PMID: 32122285 DOI: 10.1177/0192623320906817] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A3, generated as a monoclonal antibody against rat malignant fibrous histiocytoma cells, recognizes somatic stem cells in rats. We analyzed the distribution of A3-positive cells in dextran sulfate sodium (DSS)-induced colonic lesions consisting of regenerating mucosa and fibrosis. Male 6-week-old F344 rats were administered 5% DSS in drinking water for 5 to 7 days, and lesions at recovery stage were also examined. In untreated control adult colons, A3-positive cells are localized around the crypts where stem cell niche is formed. Histopathologically, in colons of DSS-administered rats, mucosal atrophy, inflammatory cell infiltration, and fibrosis were observed in the lamina propria; thereafter, mucosal epithelia were desquamated, and crypts were decreased gradually with decrease in surrounding A3-positive cells. At the early recovery stage, crypts showed regeneration with reappearance of A3-positive cells. Interestingly, A3-positive cells aggregated in desquamated mucosa surface of fibrosis. Aggregated A3-positive cells coexpressed with vimentin, Thy-1, and partly CK19 but did not react simultaneously with α-SMA. Likely, aggregated A3-positive cells may be rescue cells with nature of both mesenchymal and epithelial cells to maintain self-renewal after injury in the colon. A3 antibody would become a useful tool to investigate the participation of stem cells in rat colonic lesions.
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Affiliation(s)
- Hironobu Nishina
- Laboratory of Veterinary Pathology, Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Chisa Katou-Ichikawa
- Laboratory of Veterinary Pathology, Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Mizuki Kuramochi
- Laboratory of Veterinary Pathology, Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
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Nishimoto Y, Nagashima S, Nakajima K, Ohira T, Sato T, Izawa T, Yamate J, Higashikawa K, Kuge Y, Ogawa M, Kojima C. Carboxyl-, sulfonyl-, and phosphate-terminal dendrimers as a nanoplatform with lymph node targeting. Int J Pharm 2020; 576:119021. [PMID: 31917298 DOI: 10.1016/j.ijpharm.2020.119021] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 11/30/2019] [Accepted: 01/03/2020] [Indexed: 01/10/2023]
Abstract
The development of drug delivery vehicles to cancer and/or immune cells in lymph nodes is important for cancer diagnosis, therapy, and immunotherapy. We previously reported that anionic carboxyl-terminal dendrimers were accumulated in lymph nodes. In this study, three anionic dendrimers with carboxyl-, sulfonyl-, and phosphate-terminal groups were prepared to examine the lymph node targeting and the association with immune cells in the lymph nodes. These anionic dendrimers were accumulated in the lymph node by intradermal injection. Although the carboxyl- and sulfonyl-terminal dendrimers were diffused from the injection site, the phosphate-terminal dendrimers were mostly retained. The phosphate-terminal dendrimer was recognized by the macrophages, dendritic cells, and B cells in the lymph node, whereas the carboxyl- and sulfonyl-terminal dendrimers were not. Our results show that these anionic dendrimers were accumulated in the lymph node where the association with immune cells could be controlled by the terminal structure of the dendrimer. The phosphate-terminal dendrimer can be used as a nanoplatform for the delivery of some bioactive molecules to some immune cells, including B cells, in the lymph node.
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Affiliation(s)
- Yutaka Nishimoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-2, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
| | - Shu Nagashima
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-2, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
| | - Kohei Nakajima
- Laboratory of Bioanalysis and Molecular Imaging, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo, Hokkaido 060-0812, Japan
| | - Takayuki Ohira
- Laboratory of Bioanalysis and Molecular Imaging, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo, Hokkaido 060-0812, Japan
| | - Tatsumi Sato
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-2, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58, Rinku Orai Kita, Izumisano, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58, Rinku Orai Kita, Izumisano, Osaka 598-8531, Japan
| | - Kei Higashikawa
- Central Institutes of Isotope Science, Hokkaido University, Kita 15 Nishi 7, Kita-ku, Sapporo, Hokkaido 060-0815, Japan
| | - Yuji Kuge
- Central Institutes of Isotope Science, Hokkaido University, Kita 15 Nishi 7, Kita-ku, Sapporo, Hokkaido 060-0815, Japan
| | - Mikako Ogawa
- Laboratory of Bioanalysis and Molecular Imaging, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo, Hokkaido 060-0812, Japan
| | - Chie Kojima
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-2, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan.
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Hashimoto A, Karim MR, Kuramochi M, Izawa T, Kuwamura M, Yamate J. Characterization of Macrophages and Myofibroblasts Appearing in Dibutyltin Dichloride-Induced Rat Pancreatic Fibrosis. Toxicol Pathol 2020; 48:509-523. [PMID: 31896309 DOI: 10.1177/0192623319893310] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Macrophages and myofibroblasts are important in fibrogenesis. The cellular characteristics in pancreatic fibrosis remain to be investigated. Pancreatic fibrosis was induced in F344 rats by a single intravenous injection of dibutyltin dichloride. Histopathologically, the induced pancreatic fibrosis was divided into 3 grades (1+, 2+, and 3+), based on collagen deposition. Immunohistochemically, CD68-expressing M1 macrophages increased with grade and CD163-expressing M2 macrophages also increased later than M1 macrophage appearance. Double immunofluorescence showed that there were macrophages coexpressing CD68 and CD163, suggesting a possible shift from M1 to M2 types; similarly, increased major histocompatibility complex class II- and CD204-expressing macrophages were polarized toward M1 and M2 types, respectively. These findings indicated the participation of M1- and M2-polarized macrophages. Mesenchymal cells staining positive for vimentin, desmin, and α-smooth muscle actin (α-SMA) increased with grade. There were mesenchymal cells coexpressing vimentin/α-SMA, desmin/α-SMA, and glial fibrillary acidic protein (GFAP)/α-SMA; Thy-1-expressing immature mesenchymal cells also increased in fibrotic lesions. Because α-SMA expression is a reliable marker for myofibroblasts, α-SMA-expressing pancreatic myofibroblasts might be originated from GFAP-expressing pancreatic stellate cells or Thy-1-expressing immature mesenchymal cells; the myofibroblasts could simultaneously express cytoskeletal proteins such as vimentin and desmin. The present findings would provide useful information for analyses based on features of macrophages and myofibroblasts in chemically induced pancreatic fibrosis.
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Affiliation(s)
- Ai Hashimoto
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano City, Osaka, Japan
| | - Mohammad Rabiul Karim
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano City, Osaka, Japan
| | - Mizuki Kuramochi
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano City, Osaka, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano City, Osaka, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano City, Osaka, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano City, Osaka, Japan
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Wijesekera DPH, Yuba E, De Silva NH, Watanabe SI, Tsukamoto M, Ichida C, Izawa T, Itoh K, Kanegi R, Hatoya S, Yamate J, Inaba T, Sugiura K. Manipulation of the tumor microenvironment by cytokine gene transfection enhances dendritic cell-based immunotherapy. FASEB Bioadv 2020; 2:5-17. [PMID: 32123853 PMCID: PMC6996313 DOI: 10.1096/fba.2019-00052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 06/21/2019] [Accepted: 11/06/2019] [Indexed: 01/21/2023] Open
Abstract
The tumor microenvironment strongly influences clinical outcomes of immunotherapy. By transfecting genes of relevant cytokines into tumor cells, we sought to manipulate the microenvironment so as to elicit activation of T helper type 1 (Th1) responses and the maturation of dendritic cells (DCs). Using a synthetic vehicle, the efficiency of in vivo transfection of GFP-cDNA into tumor cells was about 7.5% by intratumoral injection and about 11.5% by intravenous injection. Survival was significantly improved by both intratumoral and intravenous injection of the plasmid containing cDNA of interferon-gamma, followed by intratumoral injection of DCs presenting the tumor antigens. Also, tumor growth was inhibited by these treatments. A more significant effect on survival and tumor growth inhibition was observed following injection of the plasmid containing cDNA of CD40 ligand, which is a potent inducer of DC-maturation. Furthermore, the co-injection of both IFNγ- and CD40 ligand-encoding cDNA-plasmids, followed by DC treatment, gave rise to further marked and enhancement, including 100% survival and more than 50% complete remission. This treatment regimen elicited significant increases in mature DCs and types of cells contributing to Th1 responses, and significant decreases in immune suppressor cells in the tumor. In the spleen, the treatment significantly increased activities of tumor-specific killer and natural killer cells, but no alteration was observed in mature DCs or suppressor cells. These results indicate that transfection of these cytokine genes into tumor cells significantly alter the tumor microenvironment and improve the therapeutic results of DC-based immunotherapy.
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Affiliation(s)
- Daluthgamage Patsy Himali Wijesekera
- Department of Advanced Pathobiology Graduate School of Life and Environmental Sciences Osaka Prefecture University Izumisano Japan
- Present address: Department of Pathobiology Faculty of Veterinary Medicine and Animal Science University of Peradeniya Peradeniya Sri Lanka
| | - Eiji Yuba
- Department of Applied Chemistry Graduate School of Engineering Osaka Prefecture University Sakai Japan
| | - Nadeeka Harshini De Silva
- Department of Advanced Pathobiology Graduate School of Life and Environmental Sciences Osaka Prefecture University Izumisano Japan
| | - Shun-Ichi Watanabe
- Department of Advanced Pathobiology Graduate School of Life and Environmental Sciences Osaka Prefecture University Izumisano Japan
| | - Masaya Tsukamoto
- Department of Advanced Pathobiology Graduate School of Life and Environmental Sciences Osaka Prefecture University Izumisano Japan
| | - Chihiro Ichida
- Department of Advanced Pathobiology Graduate School of Life and Environmental Sciences Osaka Prefecture University Izumisano Japan
| | - Takeshi Izawa
- Department of Integrated Structural Biosciences Graduate School of Life and Environmental Sciences Osaka Prefecture University Izumisano Osaka Japan
| | - Kazuyuki Itoh
- Research Institute Nozaki Tokushukai Daitou City Japan
| | - Ryoji Kanegi
- Department of Advanced Pathobiology Graduate School of Life and Environmental Sciences Osaka Prefecture University Izumisano Japan
| | - Shingo Hatoya
- Department of Advanced Pathobiology Graduate School of Life and Environmental Sciences Osaka Prefecture University Izumisano Japan
| | - Jyoji Yamate
- Department of Integrated Structural Biosciences Graduate School of Life and Environmental Sciences Osaka Prefecture University Izumisano Osaka Japan
| | - Toshio Inaba
- Department of Advanced Pathobiology Graduate School of Life and Environmental Sciences Osaka Prefecture University Izumisano Japan
| | - Kikuya Sugiura
- Department of Advanced Pathobiology Graduate School of Life and Environmental Sciences Osaka Prefecture University Izumisano Japan
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Kuramochi M, Izawa T, Mori M, Shimamura S, Shimada T, Kuwamura M, Yamate J. Diffuse leiomyomatosis with circumferential thickening of the gastrointestinal wall, resembling human diffuse leiomyomatosis, in a young miniature dachshund. J Vet Med Sci 2019; 82:139-142. [PMID: 31852861 PMCID: PMC7041974 DOI: 10.1292/jvms.19-0453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Leiomyoma is the most common mesenchymal tumor in the gastrointestinal (GI) tract.
Leiomyomas usually have a single or multinodular mass of various sizes, and affected
animals can develop alimentary symptoms depending on the location and size. A 3-year old
female miniature dachshund died after a history of refractory rectal prolapse,
esophagectasis and aspiration pneumonia. At necropsy, the GI wall at the gastroesophageal
and anorectal junctions was circumferentially thickened. Histologically, both GI lesions
were composed of bundles of well-differentiated smooth muscles without mass formation or
invasive growth. The neoplastic cells had little cellular atypia and low proliferative
activity, and were positive for α-smooth muscle actin. The lesions were diagnosed as
diffuse leiomyomatosis with circumferential thickening of the GI wall and has not been
described in the veterinary literature.
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Affiliation(s)
- Mizuki Kuramochi
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Mutsuki Mori
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Shunsuke Shimamura
- Veterinary Medical Center, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Terumasa Shimada
- Veterinary Medical Center, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano, Osaka 598-8531, Japan
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Atarashi M, Izawa T, Kuwamura M, Yamate J. [The role of iron overload in the progression of nonalcoholic steatohepatitis (NASH)]. Nihon Yakurigaku Zasshi 2019; 154:61-65. [PMID: 31406044 DOI: 10.1254/fpj.154.61] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Non-alcoholic steatohepatitis (NASH), one of the most common chronic liver diseases (CLD), is getting the most important cause of cirrhosis and hepatocellular carcinoma. Iron is an essential micronutrient for organisms. Once excess iron is accumulated in vital organs, dysfunctions of these organs can occur via the generation of reactive oxygen species. Hepatic iron overload is often seen in CLD patients. In NASH patients, iron accumulation in the liver is positively correlated with histological severity. Thus iron overload can contribute to progression of nonalcoholic fatty liver disease (NAFLD) to NASH. In a rat model of NASH, feeding of high-fat and high-iron diet increases hepatic inflammation with increased hepatic cytokine expression compared with feeding of high-fat diet only. In this model, iron is intensely accumulated in Kupffer cells/macrophages within the lesion, raising the possibility that iron-laden Kupffer cells/macrophages can play a key role in the enhancement of hepatic inflammation in NASH condition. On the other hand, in a rat model of liver cirrhosis, dietary iron overload clearly abrogates the development and progression of liver cirrhosis induced by repeated administration of thioacetamide (TAA). These findings suggest that iron overload can promote or suppress chronic liver diseases depending on the tissue microenvironment. Here we review and introduce the recent findings on the pathological roles of iron overload in the development and progression of NAFLD/NASH.
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Affiliation(s)
- Machi Atarashi
- Researcher Pharmacology dept. Research & Development center FUSO Pharm., Ltd.,Laboratory of Veterinary Pathology, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Sciences
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Sciences
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Sciences
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Sciences
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Konishi S, Tanaka N, Mashimo T, Yamamoto T, Sakuma T, Kaneko T, Tanaka M, Izawa T, Yamate J, Kuwamura M. Pathological characteristics of Ccdc85c knockout rats: a rat model of genetic hydrocephalus. Exp Anim 2019; 69:26-33. [PMID: 31341137 PMCID: PMC7004802 DOI: 10.1538/expanim.19-0005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Spontaneous hhy mice show hydrocephalus and subcortical heterotopia, and
a mutation in the Ccdc85c gene has been identified. To contribute to the
comparison of the role of Ccdc85c in different species, we established a
Ccdc85c KO rat and investigated its pathological phenotypes.
Ccdc85c KO rats were produced by genomic engineering using
transcription activator-like effector nuclease (TALEN). The KO rats had an approximately
350-bp deletion in Ccdc85c and lacked CCDC85C protein expression. The KO
rats showed non-obstructive hydrocephalus, subcortical heterotopia, and intracranial
hemorrhage. The KO rats had many pathological characteristics similar to those in
hhy mice. These results indicate that CCDC85C plays an important role
in cerebral development in rats, and the function of CCDC85C in the cerebrum are similar
in rats and mice.
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Affiliation(s)
- Shizuka Konishi
- Laboratory of Veterinary Pathology, Graduate School of Agriculture and Biological Sciences, Osaka Prefecture University, 1-58 Rinku Orai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Natsuki Tanaka
- Laboratory of Veterinary Pathology, Graduate School of Agriculture and Biological Sciences, Osaka Prefecture University, 1-58 Rinku Orai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Tomoji Mashimo
- Institute of Experimental Animal Sciences, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takashi Yamamoto
- Molecular Genetics Laboratory, Graduate School of Integrated Sciences for Life, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Tetsushi Sakuma
- Molecular Genetics Laboratory, Graduate School of Integrated Sciences for Life, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Takehito Kaneko
- Laboratory of Animal Reproduction and Development, Graduate School of Arts and Science, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551, Japan
| | - Miyuu Tanaka
- Veterinary Medical Center, Osaka Prefecture University, 1-58 Rinku Orai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Graduate School of Agriculture and Biological Sciences, Osaka Prefecture University, 1-58 Rinku Orai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Graduate School of Agriculture and Biological Sciences, Osaka Prefecture University, 1-58 Rinku Orai-Kita, Izumisano, Osaka 598-8531, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Graduate School of Agriculture and Biological Sciences, Osaka Prefecture University, 1-58 Rinku Orai-Kita, Izumisano, Osaka 598-8531, Japan
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Tsuji Y, Kuramochi M, Izawa T, Akiyoshi H, Yamate J, Kuwamura M. Hepatic Myoepithelial Carcinoma in a Dog: Immunohistochemical Comparison With Other Canine Hepatic Carcinomas. Vet Pathol 2019; 56:889-894. [PMID: 31170892 DOI: 10.1177/0300985819854439] [Citation(s) in RCA: 3] [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: 12/18/2022]
Abstract
An 11-year-old female miniature Dachshund dog presented with a solid, soft, gray mass on the hepatic lateral left lobe. Histologically, the mass consisted of neoplastic proliferation of cells with round nuclei and eosinophilic and vacuolated cytoplasm arranged in alveolar, trabecular, and solid patterns. Immunohistochemically, the neoplastic cells were positive for pancytokeratin (CK AE1/AE3), CK5, CK14, vimentin, Sox9, and myoepithelial markers (α-smooth muscle actin, p63, and calponin). The morphological and immunohistochemical findings indicated a diagnosis of myoepithelial carcinoma. We conducted immunohistochemical studies on other representative canine hepatic tumors. Although the myoepithelial phenotype was not observed in the hepatocellular carcinoma, some tumor cells in cholangiocarcinoma showed immunohistochemical features of myoepithelium, suggesting that some neoplastic cells in cholangiocarcinoma may have the potential to differentiate into myoepithelial cells. To our knowledge, this is the first report in veterinary medicine of a hepatic carcinoma with a myoepithelial phenotype.
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Affiliation(s)
- Yuka Tsuji
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka, Japan
| | - Mizuki Kuramochi
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka, Japan
| | - Hideo Akiyoshi
- Veterinary Surgery, Osaka Prefecture University, Izumisano, Osaka, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka, Japan
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Ioannidis M, Tanaka M, Yasui S, Kezuka C, Oyamada M, Hasegawa T, Izawa T, Yamate J, Kuwamura M. Late onset of cerebellar cortical degeneration in a Magellanic penguin (Spheniscus magellanicus). J Vet Med Sci 2019; 81:750-752. [PMID: 30956256 PMCID: PMC6541849 DOI: 10.1292/jvms.19-0089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
An 8-year-old female Magellanic penguin (Spheniscus magellanicus) started to show epilepsy-like seizures. Subsequent magnetic resonance imaging (MRI) examinations did not
reveal any responsible lesions. The neurological symptoms worsened at the age of 10. This penguin became recumbent and died 6 months later after the apparition of the recumbency. At
necropsy, only multiple yellowish necrotic lesions in the air sacs and lungs were found. Histopathological evaluation of the brain showed a marked loss of Purkinje cells and many
hypertrophied parvalbumin-positive basket/stellate cells were seen in the cerebellar cortex. Calbindin immunohistochemistry demonstrated disrupted arrangement of dendrites in the Purkinje
cells. This case was diagnosed as cerebellar cortical degeneration with a very late onset and a slow progression in a Magellanic penguin.
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Affiliation(s)
- Marianthi Ioannidis
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Science, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Miyuu Tanaka
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Science, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Sayaka Yasui
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Science, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Chiho Kezuka
- Kobe Municipal Suma Aqualife Park, Kobe, Hyogo 654-0049, Japan
| | | | | | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Science, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Science, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Science, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
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Mori M, Izawa T, Sasaki H, Sonoyama J, Nishimura S, Shimamura S, Shimada T, Hasegawa T, Kuwamura M, Yamate J. A Case of Feline T-cell Lymphoma with Tropism for Striated Muscle and Peripheral Nerve. J Comp Pathol 2019; 168:8-12. [PMID: 31103059 PMCID: PMC7094551 DOI: 10.1016/j.jcpa.2019.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/27/2019] [Accepted: 02/04/2019] [Indexed: 11/18/2022]
Abstract
An 11-year-old female American shorthair cat was presented with a 3-month history of hindlimb ataxia and knuckling of the left forelimb. Clinical abnormalities included weight loss, hyperaesthesia of the neck and back, cardiac murmur and systemic muscle atrophy. The cat died 10 days after the initial presentation and a necropsy examination was performed. Grossly, extensive pale lesions were seen in the wall of the left ventricle and the septum of the heart. There were no detectable masses in the heart, skeletal muscles or peripheral nerves. Histopathological examination revealed diffuse, extensive infiltration of atypical lymphoid cells in the heart; the cardiac muscles were markedly degenerate and atrophic and were replaced by the neoplastic cells. Neoplastic cells with similar morphology were seen in all specimens of the skeletal muscles and peripheral nerves. Clonality analysis of the paraffin wax-embedded heart tissue revealed a monoclonal rearrangement of the gene encoding the T-cell receptor γ chain. Based on these findings, the case was diagnosed as T-cell lymphoma with tropism for striated muscle and peripheral nerve.
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Affiliation(s)
- M Mori
- Laboratory of Veterinary Pathology, Osaka, Japan
| | - T Izawa
- Laboratory of Veterinary Pathology, Osaka, Japan.
| | - H Sasaki
- Veterinary Medical Center, Osaka Prefecture University, 1-58 Rinku Orai Kita, Izumisano, Osaka, Japan
| | - J Sonoyama
- Veterinary Medical Center, Osaka Prefecture University, 1-58 Rinku Orai Kita, Izumisano, Osaka, Japan
| | - S Nishimura
- Veterinary Medical Center, Osaka Prefecture University, 1-58 Rinku Orai Kita, Izumisano, Osaka, Japan
| | - S Shimamura
- Veterinary Medical Center, Osaka Prefecture University, 1-58 Rinku Orai Kita, Izumisano, Osaka, Japan
| | - T Shimada
- Veterinary Medical Center, Osaka Prefecture University, 1-58 Rinku Orai Kita, Izumisano, Osaka, Japan
| | - T Hasegawa
- Veterinary Medical Center, Osaka Prefecture University, 1-58 Rinku Orai Kita, Izumisano, Osaka, Japan
| | - M Kuwamura
- Laboratory of Veterinary Pathology, Osaka, Japan
| | - J Yamate
- Laboratory of Veterinary Pathology, Osaka, Japan
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Rahman N, Kezuka C, Higashiguchi N, Kosaka N, Izawa T, Yamate J, Kuwamura M. Spontaneous peripheral neuritis in two electric eels (Electrophorus electricus). J Vet Med Sci 2019; 81:744-746. [PMID: 30842355 PMCID: PMC6541840 DOI: 10.1292/jvms.18-0751] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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] [Indexed: 11/22/2022] Open
Abstract
This study represents cases with spontaneous neuritis of peripheral nerves in electric eels. Two electric eels were presented with abnormal swimming behavior and loss of appetite. Electric
eels had extensive histopathologic lesions in the splenic and cardiac nerves. The lesions were characterized by swelling of neuronal cells, central chromatolysis and marked inflammatory cell
infiltration consisting mainly of lymphocytes around the affected nerves. To the best of our knowledge, this is the first case report of spontaneous neuritis of peripheral nerves in electric
eels.
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Affiliation(s)
- Nahid Rahman
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Chiho Kezuka
- Kobe Municipal Suma Aqualife Park, Kobe, Hyogo 654-0049, Japan
| | | | - Naoya Kosaka
- Kobe Municipal Suma Aqualife Park, Kobe, Hyogo 654-0049, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
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Itoh H, Tanaka Y, Izawa T. Genetic Relationship Between Phytochromes and OsELF3-1 Reveals the Mode of Regulation for the Suppression of Phytochrome Signaling in Rice. Plant Cell Physiol 2019; 60:549-561. [PMID: 30476313 DOI: 10.1093/pcp/pcy225] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 11/20/2018] [Indexed: 06/09/2023]
Abstract
EARLY FLOWERING3 (ELF3) functions as a night-time repressor required for sustaining circadian rhythms and co-ordinating growth and development in various plant species. The rice genome carries two ELF3 homologs, namely OsELF3-1 and OsELF3-2. Previous studies have suggested that OsELF3-1 has a predominant role in controlling rice photoperiodic flowering, while also contributing to the transcriptional regulation of rice floral regulators expressed in the morning. However, OsELF3-1 has not been functionally characterized. Here, we observed that the oself3-1 mutation suppresses the photoperiod-insensitive early flowering of photoperiod sensitivity5 (se5), which is a chromophore-deficient rice mutant. Detailed analyses of the se5oself3-1 double mutant revealed the recovery of the phytochrome-dependent expression of Grain number, plant height, and heading date7 (Ghd7), a floral repressor, and Light-harvesting chlorophyll a/b binding protein (Lhcb) genes. Although the oself3-1 mutation recovered Ghd7 expression in the se5 background, there was a lack of Ghd7 expression in the phyAphyBphyC triple mutant background. These observations suggest that OsELF3-1 represses Ghd7 expression by inhibiting the phytochrome signaling pathway. Comparative genome analyses indicated that OsELF3-1 was produced via gene duplication events in Oryza species, and that it is expressed throughout the day. A comparison between the oself3-1 mutant and transgenic rice lines in which OsELF3-1 and OsELF3-2 are simultaneously silenced uncovered a role for OsELF3-1 in addition to the canonical ELF3 function as an evolutionarily conserved role for a night-time repressor that regulates the rice circadian clock. Our study confirmed that an ELF3 paralog, OsELF3-1, had a unique role involving the suppression of phytochrome signaling.
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Affiliation(s)
- Hironori Itoh
- National Agriculture and Food Research Organization, Institute of Crop Science, NARO (NICS), Kannondai 2-1-2, Tsukuba, Japan
- Functional Plant Research Unit, National Institute of Agrobiological Sciences (NIAS), Kannondai, Tsukuba, Japan
| | - Yuri Tanaka
- Functional Plant Research Unit, National Institute of Agrobiological Sciences (NIAS), Kannondai, Tsukuba, Japan
| | - Takeshi Izawa
- Functional Plant Research Unit, National Institute of Agrobiological Sciences (NIAS), Kannondai, Tsukuba, Japan
- Laboratory of Plant Breeding and Genetics, University of Tokyo, Faculty of Agriculture, Bunkyo-ku, Yayoi 1-1-1, Tokyo, Japan
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Koga M, Kuramochi M, Karim MR, Izawa T, Kuwamura M, Yamate J. Immunohistochemical characterization of myofibroblasts appearing in isoproterenol-induced rat myocardial fibrosis. J Vet Med Sci 2018; 81:127-133. [PMID: 30464077 PMCID: PMC6361647 DOI: 10.1292/jvms.18-0599] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Fibrotic lesion is formed by myofibroblasts capable of producing collagens. The myofibroblasts are characterized by immunoexpressions of vimentin, desmin and α-smooth muscle actin (α-SMA)
in varying degrees. The cellular characteristics remain investigated in myocardial fibrosis. We analyzed immunophenotypes of myofibroblasts appearing in isoproterenol-induced myocardial
fibrosis in rats until 28 days after injection (10 mg/kg body weight); the lesions developed as interstitial edema and inflammatory cell reaction on 8 hr and days 1 and 3, and fibrosis
occurred on days 1, 3, 7, 14, and 21 by gradual deposition of collagens, showing the greatest grade on day 14; the lesions gradually reduced with sporadic scar until day 28. Myofibroblasts
expressing vimentin and α-SMA increased with a peak on day 3, and then, gradually decreased onwards. Interestingly, Thy-1 expressing cells appeared in the affected areas, apparently being
corresponding to the grade similar to vimentin- and α-SMA-positive cells. Thy-1 is expressed in immature mesenchymal cells such as pericytes with pluripotent nature. The immunoreactivity for
A3-antigen, a marker for immature mesenchymal cells, was seen in some surrounding cells. There were no cells reacting with antibodies to nestin or glial fibrillary acidic protein, although
hepatic myofibroblats have been reported to react with these antibodies. Collectively, myofibroblasts appearing in rat myocardial fibrosis may have been derived from immature mesenchymal
cells positive for Thy-1 or A3-antigen, with thereafter showing expressions of vimentin and α-SMA in differentiation.
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Affiliation(s)
- Masaaki Koga
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano-shi, Osaka 598-8531, Japan.,Nippon Shinyaku Co., Ltd., 14, Nishinosho-Monguchi-cho, Kisshoin, Minami-ku, Kyoto 601-8550, Japan
| | - Mizuki Kuramochi
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano-shi, Osaka 598-8531, Japan
| | - Mohammad Rabiul Karim
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano-shi, Osaka 598-8531, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano-shi, Osaka 598-8531, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano-shi, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Ourai-Kita, Izumisano-shi, Osaka 598-8531, Japan
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Mitori H, Izawa T, Kuwamura M, Matsumoto M, Yamate J. Gene expression profile in retinal excitotoxicity induced by L-glutamate in neonatal rats. J Toxicol Pathol 2018; 31:301-306. [PMID: 30393434 PMCID: PMC6206281 DOI: 10.1293/tox.2018-0026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 07/06/2018] [Indexed: 11/24/2022] Open
Abstract
In neonatal rats, glutamate could induce retinal thinning depending on the development
stage, and the severity peaked at treatment on postnatal day (PND) 8. To elucidate the
molecular mechanism of retinal thinning induced by L-glutamate in neonatal rats, we
investigated the time-course gene expression profile in the developing retina in addition
to initial histopathological changes. Histopathologically, apoptotic cells in the inner
retina were observed at 6 hours after treatment on PNDs 4, 6 and 8, and inflammatory cell
infiltration was noted at 24 hours. Comprehensive gene expression analysis conducted on
PNDs 4 and 8 indicated that cell death/proliferation- and inflammation-related genes were
upregulated and that neuron development- and neurotransmitter-related genes were
downregulated. Furthermore, quantitative RT-PCR analysis of apoptosis- and
inflammation-related genes performed on PNDs 4, 6, 8, 10 and 12 showed that the
time-course changes of the gene expression ratios of Gadd45b and
Ccl3 seemed to be related to histopathological changes of the retina
induced by L-glutamate. These results revealed that the association of initial
histopathological changes with the gene expression profile in the retina induced by
L-glutamate and that Gadd45b and Ccl3 are considered to
participate in retinal thinning induced by L-glutamate in neonatal rats.
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Affiliation(s)
- Hikaru Mitori
- Drug Safety Research Labs., Astellas Pharma Inc., 21 Miyukigaoka, Tsukuba-shi, Ibaraki, 305-8585, Japan.,Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Rinku Ourai Kita 1-58 Izumisano-shi, Osaka 598-8531, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Rinku Ourai Kita 1-58 Izumisano-shi, Osaka 598-8531, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Rinku Ourai Kita 1-58 Izumisano-shi, Osaka 598-8531, Japan
| | - Masahiro Matsumoto
- Drug Safety Research Labs., Astellas Pharma Inc., 21 Miyukigaoka, Tsukuba-shi, Ibaraki, 305-8585, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Rinku Ourai Kita 1-58 Izumisano-shi, Osaka 598-8531, Japan
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Nishiyama K, Aono K, Fujimoto Y, Kuwamura M, Okada T, Tokumoto H, Izawa T, Okano R, Nakajima H, Takeuchi T, Azuma YT. Chronic kidney disease after 5/6 nephrectomy disturbs the intestinal microbiota and alters intestinal motility. J Cell Physiol 2018; 234:6667-6678. [PMID: 30317589 DOI: 10.1002/jcp.27408] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 08/21/2018] [Indexed: 12/11/2022]
Abstract
Organ-organ crosstalk is involved in homeostasis. Gastrointestinal symptoms are common in patients with renal failure. The aim of this study was to elucidate the relationship between gastrointestinal motility and gastrointestinal symptoms in chronic kidney disease. We performed studies in C57BL/6 mice with chronic kidney disease after 5/6 nephrectomy. Gastrointestinal motility was evaluated by assessing the ex vivo responses of ileum and distal colon strips to electrical field stimulation. Feces were collected from mice, and the composition of the gut microbiota was analyzed using 16S ribosomal RNA sequencing. Mice with chronic kidney disease after 5/6 nephrectomy showed a decreased amount of stool, and this constipation was correlated with a suppressed contraction response in ileum motility and decreased relaxation response in distal colon motility. Spermine, one of the uremic toxins, inhibited the contraction response in ileum motility, but four types of uremic toxins showed no effect on the relaxation response in distal colon motility. The 5/6 nephrectomy procedure disturbed the balance of the gut microbiota in the mice. The motility dysregulation and constipation were resolved by antibiotic treatments. The expression levels of interleukin 6, tumor necrosis factor-α, and iNOS in 5/6 nephrectomy mice were increased in the distal colon but not in the ileum. In addition, macrophage infiltration in 5/6 nephrectomy mice was increased in the distal colon but not in the ileum. We found that 5/6 nephrectomy altered gastrointestinal motility and caused constipation by changing the gut microbiota and causing colonic inflammation. These findings indicate that renal failure was remarkably associated with gastrointestinal dysregulation.
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Affiliation(s)
- Kazuhiro Nishiyama
- Laboratory of Veterinary Pharmacology, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Science, Osaka, Japan
| | - Kimiya Aono
- Laboratory of Veterinary Pharmacology, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Science, Osaka, Japan
| | - Yasuyuki Fujimoto
- Laboratory of Veterinary Pharmacology, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Science, Osaka, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Science, Osaka, Japan
| | - Toshiya Okada
- Department of Laboratory Animal Science, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Science, Osaka, Japan
| | - Hayato Tokumoto
- Laboratory of Bioscience and Biotechnology, Division of Biological Science, Osaka Prefecture University Graduate School of Science, Osaka, Japan
| | - Takeshi Izawa
- Laboratory of Veterinary Pathology, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Science, Osaka, Japan
| | - Ryoichi Okano
- Laboratory of Separation Science and Engineering, Division of Chemical Engineering, Osaka Prefecture University Graduate School of Engineering, Osaka, Japan
| | - Hidemitsu Nakajima
- Laboratory of Veterinary Pharmacology, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Science, Osaka, Japan
| | - Tadayoshi Takeuchi
- Laboratory of Veterinary Pharmacology, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Science, Osaka, Japan
| | - Yasu-Taka Azuma
- Laboratory of Veterinary Pharmacology, Division of Veterinary Science, Osaka Prefecture University Graduate School of Life and Environmental Science, Osaka, Japan
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