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Choijookhuu N, Yano K, Lkham-Erdene B, Shirouzu S, Kubota T, Fidya, Ishizuka T, Kai K, Chosa E, Hishikawa Y. HMGB2 Promotes De Novo Lipogenesis to Accelerate Hepatocyte Proliferation During Liver Regeneration. J Histochem Cytochem 2024; 72:245-264. [PMID: 38544368 PMCID: PMC11020747 DOI: 10.1369/00221554241241569] [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: 11/08/2023] [Accepted: 02/26/2024] [Indexed: 04/16/2024] Open
Abstract
Liver regeneration is a well-orchestrated compensatory process that is regulated by multiple factors. We recently reported the importance of the chromatin protein, a high-mobility group box 2 (HMGB2) in mouse liver regeneration. However, the molecular mechanism remains unclear. In this study, we aimed to study how HMGB2 regulates hepatocyte proliferation during liver regeneration. Seventy-percent partial hepatectomy (PHx) was performed in wild-type (WT) and HMGB2-knockout (KO) mice, and the liver tissues were used for microarray, immunohistochemistry, quantitative polymerase chain reaction (qPCR), and Western blotting analyses. In the WT mice, HMGB2-positive hepatocytes colocalized with cell proliferation markers. In the HMGB2-KO mice, hepatocyte proliferation was significantly decreased. Oil Red O staining revealed the transient accumulation of lipid droplets at 12-24 hr after PHx in the WT mouse livers. In contrast, decreased amount of lipid droplets were found in HMGB2-KO mouse livers, and it was preserved until 36 hr. The microarray, immunohistochemistry, and qPCR results demonstrated that the expression of lipid metabolism-related genes was significantly decreased in the HMGB2-KO mouse livers. The in vitro experiments demonstrated that a decrease in the amount of lipid droplets correlated with decreased cell proliferation activity in HMGB2-knockdown cells. HMGB2 promotes de novo lipogenesis to accelerate hepatocyte proliferation during liver regeneration.
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Affiliation(s)
- Narantsog Choijookhuu
- Department of Anatomy, Histochemistry and Cell Biology
- Faculty of Medicine, University of Miyazaki, Miyazaki, Japan; and Department of Pathology and Forensic Medicine, School of Biomedicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Koichi Yano
- Department of Anatomy, Histochemistry and Cell Biology
- Department of Surgery
| | | | - Shinichiro Shirouzu
- Department of Anatomy, Histochemistry and Cell Biology
- Department of Oral and Maxillofacial Surgery
| | - Toshiki Kubota
- Department of Anatomy, Histochemistry and Cell Biology
- Department of Oral and Maxillofacial Surgery
| | - Fidya
- Department of Anatomy, Histochemistry and Cell Biology
| | | | - Kengo Kai
- Department of Anatomy, Histochemistry and Cell Biology
- Department of Surgery
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Fidya, Choijookhuu N, Ikenoue M, Yano K, Yamaguma Y, Shirouzu S, Kai K, Ishizuka T, Hishikawa Y. Protective role of estrogen through G-protein coupled receptor 30 in a colitis mouse model. Histochem Cell Biol 2024; 161:81-93. [PMID: 37821557 DOI: 10.1007/s00418-023-02235-z] [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] [Accepted: 08/24/2023] [Indexed: 10/13/2023]
Abstract
Estrogen and its receptors are involved in the pathogenesis of gastrointestinal diseases such as colitis. However, the role of the membrane estrogen receptor G-protein-coupled receptor 30 (GPR30) in colitis is poorly understood. We therefore investigated the effect of estrogen in dextran sulfate sodium (DSS)-induced colitis. Male C57BL/6 mice were administered 1.5% DSS for 5 days and treated with 17β-estradiol (E2), GPR30 agonist (G1), or GPR30 antagonist (G15) for 8 days. Inflammation grade was evaluated by disease activity index (DAI) and histomorphological score. Colon tissues were immunohistochemically analyzed and revealed high expression of membrane GPR30, histone 3 lysine 36 dimethylation, and lysine 79 trimethylation in normal mouse colon epithelial cells but significantly decreased expression in DSS-treated mice, whereas the expression was partially preserved after treatment with E2 or G1. Colon shortening and DAI were significantly lower in E2- and G1-treated mice compared to DSS-treated mice. Caudal type homeobox 2 (CDX2) expression and cell proliferation differed in normal colon epithelial cells but overlapped in those of DSS-treated mice. Administration of E2 and G1 reduced CDX2 expression and cell proliferation. Altered expression of claudin-2 and occludin were observed in the colonic epithelium of DSS-treated mice, and these changes were significantly lower in the colon of E2- and G1-treated mice. These results indicate that estrogen regulates histone modification, cell proliferation, and CDX2 expression through GPR30, which affects intestinal epithelial barrier function. We conclude that estrogen protects against intestinal epithelial damage through GPR30 by enhancing intestinal epithelial barrier function in DSS-induced colitis in mice.
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Affiliation(s)
- Fidya
- Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
- Department of Oral Biology, Faculty of Dentistry, Universitas Brawijaya, Malang, Jawa Timur, Indonesia
| | - Narantsog Choijookhuu
- Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Makoto Ikenoue
- Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
- Department of Surgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Koichi Yano
- Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
- Department of Surgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Yu Yamaguma
- Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Shinichiro Shirouzu
- Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Kengo Kai
- Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
- Department of Surgery, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Takumi Ishizuka
- Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Yoshitaka Hishikawa
- Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan.
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Starkova T, Polyanichko A, Tomilin AN, Chikhirzhina E. Structure and Functions of HMGB2 Protein. Int J Mol Sci 2023; 24:ijms24098334. [PMID: 37176041 PMCID: PMC10179549 DOI: 10.3390/ijms24098334] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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: 03/31/2023] [Revised: 04/17/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023] Open
Abstract
High-Mobility Group (HMG) chromosomal proteins are the most numerous nuclear non-histone proteins. HMGB domain proteins are the most abundant and well-studied HMG proteins. They are involved in variety of biological processes. HMGB1 and HMGB2 were the first members of HMGB-family to be discovered and are found in all studied eukaryotes. Despite the high degree of homology, HMGB1 and HMGB2 proteins differ from each other both in structure and functions. In contrast to HMGB2, there is a large pool of works devoted to the HMGB1 protein whose structure-function properties have been described in detail in our previous review in 2020. In this review, we attempted to bring together diverse data about the structure and functions of the HMGB2 protein. The review also describes post-translational modifications of the HMGB2 protein and its role in the development of a number of diseases. Particular attention is paid to its interaction with various targets, including DNA and protein partners. The influence of the level of HMGB2 expression on various processes associated with cell differentiation and aging and its ability to mediate the differentiation of embryonic and adult stem cells are also discussed.
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Affiliation(s)
- Tatiana Starkova
- Laboratory of Molecular Biology of Stem Cells, Institute of Cytology of the Russian Academy of Sciences, Tikhoretsky Av. 4, 194064 St. Petersburg, Russia
| | - Alexander Polyanichko
- Laboratory of Molecular Biology of Stem Cells, Institute of Cytology of the Russian Academy of Sciences, Tikhoretsky Av. 4, 194064 St. Petersburg, Russia
| | - Alexey N Tomilin
- Laboratory of Molecular Biology of Stem Cells, Institute of Cytology of the Russian Academy of Sciences, Tikhoretsky Av. 4, 194064 St. Petersburg, Russia
| | - Elena Chikhirzhina
- Laboratory of Molecular Biology of Stem Cells, Institute of Cytology of the Russian Academy of Sciences, Tikhoretsky Av. 4, 194064 St. Petersburg, Russia
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Shirouzu S, Sugita N, Choijookhuu N, Yamaguma Y, Takeguchi K, Ishizuka T, Tanaka M, Fidya, Kai K, Chosa E, Yamashita Y, Koshimoto C, Hishikawa Y. Correction: Pivotal role of High-Mobility Group Box 2 in ovarian folliculogenesis and fertility. J Ovarian Res 2023; 16:21. [PMID: 36694245 PMCID: PMC9872290 DOI: 10.1186/s13048-023-01105-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
An amendment to this paper has been published and can be accessed via the original article.
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Affiliation(s)
- Shinichiro Shirouzu
- grid.410849.00000 0001 0657 3887Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan ,grid.410849.00000 0001 0657 3887Department of Oral and Maxillofacial Surgery, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan
| | - Naohiro Sugita
- grid.410849.00000 0001 0657 3887Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan ,grid.410849.00000 0001 0657 3887Department of Ophthalmology, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan
| | - Narantsog Choijookhuu
- grid.410849.00000 0001 0657 3887Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan
| | - Yu Yamaguma
- grid.410849.00000 0001 0657 3887Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan ,grid.410849.00000 0001 0657 3887Department of Oral and Maxillofacial Surgery, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan
| | - Kanako Takeguchi
- grid.410849.00000 0001 0657 3887Division of Bio-resources, Department of Biotechnology, Frontier Science Research Center, University of Miyazaki, Kihara, Kiyotake, Miyazaki 5200, 889-1692 Japan
| | - Takumi Ishizuka
- grid.410849.00000 0001 0657 3887Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan
| | - Mio Tanaka
- grid.410849.00000 0001 0657 3887Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan
| | - Fidya
- grid.410849.00000 0001 0657 3887Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan
| | - Kengo Kai
- grid.410849.00000 0001 0657 3887Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan ,grid.410849.00000 0001 0657 3887Department of Surgery, Faculty of Medicine, University of Miyazaki, Kihara, Kiyotake, Miyazaki 889–1692 Japan
| | - Etsuo Chosa
- grid.410849.00000 0001 0657 3887Department of Orthopaedic Surgery, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan
| | - Yoshihiro Yamashita
- grid.410849.00000 0001 0657 3887Department of Oral and Maxillofacial Surgery, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan
| | - Chihiro Koshimoto
- grid.410849.00000 0001 0657 3887Division of Bio-resources, Department of Biotechnology, Frontier Science Research Center, University of Miyazaki, Kihara, Kiyotake, Miyazaki 5200, 889-1692 Japan
| | - Yoshitaka Hishikawa
- grid.410849.00000 0001 0657 3887Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, 5200, 889-1692 Kihara, Kiyotake, Miyazaki Japan
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