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Jokl E, Llewellyn J, Simpson K, Adegboye O, Pritchett J, Zeef L, Donaldson I, Athwal VS, Purssell H, Street O, Bennett L, Guha IN, Hanley NA, Meng QJ, Piper Hanley K. Circadian Disruption Primes Myofibroblasts for Accelerated Activation as a Mechanism Underpinning Fibrotic Progression in Non-Alcoholic Fatty Liver Disease. Cells 2023; 12:1582. [PMID: 37371052 DOI: 10.3390/cells12121582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 06/29/2023] Open
Abstract
Circadian rhythm governs many aspects of liver physiology and its disruption exacerbates chronic disease. CLOCKΔ19 mice disrupted circadian rhythm and spontaneously developed obesity and metabolic syndrome, a phenotype that parallels the progression of non-alcoholic fatty liver disease (NAFLD). NAFLD represents an increasing health burden with an estimated incidence of around 25% and is associated with an increased risk of progression towards inflammation, fibrosis and carcinomas. Excessive extracellular matrix deposition (fibrosis) is the key driver of chronic disease progression. However, little attention was paid to the impact of disrupted circadian rhythm in hepatic stellate cells (HSCs) which are the primary mediator of fibrotic ECM deposition. Here, we showed in vitro and in vivo that liver fibrosis is significantly increased when circadian rhythm is disrupted by CLOCK mutation. Quiescent HSCs from CLOCKΔ19 mice showed higher expression of RhoGDI pathway components and accelerated activation. Genes altered in this primed CLOCKΔ19 qHSC state may provide biomarkers for early liver disease detection, and include AOC3, which correlated with disease severity in patient serum samples. Integration of CLOCKΔ19 microarray data with ATAC-seq data from WT qHSCs suggested a potential CLOCK regulome promoting a quiescent state and downregulating genes involved in cell projection assembly. CLOCKΔ19 mice showed higher baseline COL1 deposition and significantly worse fibrotic injury after CCl4 treatment. Our data demonstrate that disruption to circadian rhythm primes HSCs towards an accelerated fibrotic response which worsens liver disease.
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Affiliation(s)
- Elliot Jokl
- Wellcome Centre for Cell-Matrix Research, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
- Division of Diabetes, Endocrinology and Gastroenterology, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Jessica Llewellyn
- Division of Diabetes, Endocrinology and Gastroenterology, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Kara Simpson
- Wellcome Centre for Cell-Matrix Research, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
- Division of Diabetes, Endocrinology and Gastroenterology, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Oluwatobi Adegboye
- Division of Diabetes, Endocrinology and Gastroenterology, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - James Pritchett
- Department of Life Sciences, Manchester Metropolitan University, Manchester M15 6BH, UK
| | - Leo Zeef
- Bioinformatics Core Facility, Faculty of Life Sciences, University of Manchester, Manchester M13 9PL, UK
| | - Ian Donaldson
- Bioinformatics Core Facility, Faculty of Life Sciences, University of Manchester, Manchester M13 9PL, UK
| | - Varinder S Athwal
- Wellcome Centre for Cell-Matrix Research, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
- Division of Diabetes, Endocrinology and Gastroenterology, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
- Manchester University NHS Foundation Trust, Oxford Road, Manchester M13 9WL, UK
| | - Huw Purssell
- Division of Diabetes, Endocrinology and Gastroenterology, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
- Manchester University NHS Foundation Trust, Oxford Road, Manchester M13 9WL, UK
| | - Oliver Street
- Division of Diabetes, Endocrinology and Gastroenterology, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Lucy Bennett
- National Institute for Health Research, Nottingham Biomedical Research Centre, Nottingham University Hospitals National Health Service Trust, University of Nottingham, Nottingham NG7 2RD, UK
| | - Indra Neil Guha
- National Institute for Health Research, Nottingham Biomedical Research Centre, Nottingham University Hospitals National Health Service Trust, University of Nottingham, Nottingham NG7 2RD, UK
| | - Neil A Hanley
- Division of Diabetes, Endocrinology and Gastroenterology, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
- Manchester University NHS Foundation Trust, Oxford Road, Manchester M13 9WL, UK
| | - Qing-Jun Meng
- Wellcome Centre for Cell-Matrix Research, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Karen Piper Hanley
- Wellcome Centre for Cell-Matrix Research, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
- Division of Diabetes, Endocrinology and Gastroenterology, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Oxford Road, Manchester M13 9PL, UK
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A current overview of RhoA, RhoB, and RhoC functions in vascular biology and pathology. Biochem Pharmacol 2022; 206:115321. [DOI: 10.1016/j.bcp.2022.115321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 10/17/2022] [Accepted: 10/18/2022] [Indexed: 11/24/2022]
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Kowluru A, Gleason NF. Underappreciated roles for Rho GDP dissociation inhibitors (RhoGDIs) in cell function: Lessons learned from the pancreatic islet β-cell. Biochem Pharmacol 2022; 197:114886. [PMID: 34968495 PMCID: PMC8858860 DOI: 10.1016/j.bcp.2021.114886] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/10/2021] [Accepted: 12/13/2021] [Indexed: 11/02/2022]
Abstract
Rho subfamily of G proteins (e.g., Rac1) have been implicated in glucose-stimulated insulin secretion from the pancreatic β-cell. Interestingly, metabolic stress (e.g., chronic exposure to high glucose) results in sustained activation of Rac1 leading to increased oxidative stress, impaired insulin secretion and β-cell dysfunction. Activation-deactivation of Rho G proteins is mediated by three classes of regulatory proteins, namely the guanine nucleotide exchange factors (GEFs), which facilitate the conversion of inactive G proteins to their active conformations; the GTPase-activating proteins (GAPs), which convert the active G proteins to their inactive forms); and the GDP-dissociation inhibitors (GDIs), which prevent the dissociation of GDP from G proteins. Contrary to a large number of GEFs (82 members) and GAPs (69 members), only three members of RhoGDIs (RhoGDIα, RhoGDIβ and RhoGDIγ) are expressed in mammalian cells.Even though relatively smaller in number, the GDIs appear to play essential roles in G protein function (e.g., subcellular targeting) for effector activation and cell regulation. Emerging evidence also suggests that the GDIs are functionally regulated via post-translational modification (e.g., phosphorylation) and by lipid second messengers, lipid kinases and lipid phosphatases. We highlight the underappreciated regulatory roles of RhoGDI-Rho G protein signalome in islet β-cell function in health and metabolic stress. Potential knowledge gaps in the field, and directions for future research for the identification of novel therapeutic targets to loss of functional β-cell mass under the duress of metabolic stress are highlighted.
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Affiliation(s)
- Anjaneyulu Kowluru
- Biomedical Research Service, John D. Dingell VA Medical Center and Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI 48201, USA.
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Electrostatic Forces Mediate the Specificity of RHO GTPase-GDI Interactions. Int J Mol Sci 2021; 22:ijms222212493. [PMID: 34830380 PMCID: PMC8622166 DOI: 10.3390/ijms222212493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 01/13/2023] Open
Abstract
Three decades of research have documented the spatiotemporal dynamics of RHO family GTPase membrane extraction regulated by guanine nucleotide dissociation inhibitors (GDIs), but the interplay of the kinetic mechanism and structural specificity of these interactions is as yet unresolved. To address this, we reconstituted the GDI-controlled spatial segregation of geranylgeranylated RHO protein RAC1 in vitro. Various biochemical and biophysical measurements provided unprecedented mechanistic details for GDI function with respect to RHO protein dynamics. We determined that membrane extraction of RHO GTPases by GDI occurs via a 3-step mechanism: (1) GDI non-specifically associates with the switch regions of the RHO GTPases; (2) an electrostatic switch determines the interaction specificity between the C-terminal polybasic region of RHO GTPases and two distinct negatively-charged clusters of GDI1; (3) a non-specific displacement of geranylgeranyl moiety from the membrane sequesters it into a hydrophobic cleft, effectively shielding it from the aqueous milieu. This study substantially extends the model for the mechanism of GDI-regulated RHO GTPase extraction from the membrane, and could have implications for clinical studies and drug development.
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Doi N, Togari H, Minagi K, Iwaoka Y, Tai A, Nakaoji K, Hamada K, Tatsuka M. 2-O-Octadecylascorbic acid represses RhoGDIβ expression and ameliorates DNA damage-induced abnormal spindle orientations. J Cell Biochem 2021; 122:739-751. [PMID: 33586155 DOI: 10.1002/jcb.29908] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 01/27/2021] [Accepted: 02/01/2021] [Indexed: 01/08/2023]
Abstract
The appropriate regulation of spindle orientation maintains proper tissue homeostasis and avoids aberrant tissue repair or regeneration. Spindle misorientation due to imbalance or improper functioning leads to a loss of tissue integrity and aberrant growth, such as tissue loss or overgrowth. Pharmacological manipulation to prevent spindle misorientation will enable a better understanding of how spindle orientation is involved in physiological and pathological conditions and will provide therapeutic possibilities to treat patients associated with abnormal tissue function caused by spindle misorientation. N-terminal-deleted Rho guanine nucleotide dissociation inhibitor β (RhoGDIβ/RhoGDI2/LyGDI) produced by caspase-3 activation perturbs spindle orientation in surviving cells following exposure to either ionizing radiation or UVC. Thus, presumably, RhoGDIβ cleaved by caspase-3 activation acts as a determinant of radiation-induced spindle misorientation that promote aberrant tissue repair due to deregulation of directional organization of cell population and therefore becomes a potential target of drugs to prevent such response. The objective of this study was to screen and identify chemicals that suppress RhoGDIβ expression. We focused our attention on ascorbic acid (AA) derivatives because of their impact on the maintenance of skin tissue homeostasis. Here, we screened for AA derivatives that suppress RhoGDIβ expression in HeLa cells and identified a lipophilic derivative, 2-O-octadecylascorbic acid (2-OctadecylAA), as a novel RhoGDIβ inhibitor that ameliorated ionizing radiation-induced abnormal spindle orientations. Among all examined AA derivatives, which were also antioxidative, the inhibition activity was specific to 2-OctadecylAA. Therefore, this activity was not due to simple antioxidant properties. 2-OctadecylAA was previously shown to prevent hepatocellular carcinoma development. Our findings suggest that the anticarcinogenic effects of 2-OctadecylAA are partly due to RhoGDIβ inhibition mechanisms by which spindle orientation perturbations are attenuated. Thus, the molecular targeting features of RhoGDIβ warrant its further development for the treatment or control of spindle orientation abnormalities that affect epithelial homeostasis.
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Affiliation(s)
- Natsumi Doi
- Department of Life Sciences, Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Hiroshima, Japan
| | - Hiro Togari
- Department of Life Sciences, Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Hiroshima, Japan
| | - Kenji Minagi
- Department of Life Sciences, Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Hiroshima, Japan
| | - Yuji Iwaoka
- Faculty of Health and Welfare Science, Okayama Prefectural University, Okayama, Japan
| | - Akihiro Tai
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University, Tokushima, Japan
| | - Koichi Nakaoji
- Research & Development Division, Pias Corporation, Kobe, Japan
| | - Kazuhiko Hamada
- Research & Development Division, Pias Corporation, Kobe, Japan
| | - Masaaki Tatsuka
- Department of Life Sciences, Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Hiroshima, Japan
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Wei Z, Xu H, Zhang Y, Yi X, Yang X, Chen Y, Mao N, Li S, Xu D, Li S, Zhang H, Li D, Zhang G, Zhang B, Jin F, Gao X, Cai W, Zhang L, Wang R, Yang F. Rho GDP dissociation inhibitor α silencing attenuates silicosis by inhibiting RhoA/Rho kinase signalling. Exp Cell Res 2019; 380:131-140. [PMID: 31029634 DOI: 10.1016/j.yexcr.2019.04.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/21/2019] [Accepted: 04/23/2019] [Indexed: 02/01/2023]
Abstract
Transforming growth factor-β1 (TGF-β1) alters the fibroblast phenotype by promoting transdifferentiation into myofibroblasts, which exhibit the ability to promote collagen synthesis and extracellular matrix (ECM) deposition, thereby playing a significant role in the pathology of silicosis. In this study, we investigated the regulatory mechanisms involved in myofibroblast transdifferentiation. Two-dimensional gel electrophoresis showed that Rho GDP-dissociation inhibitor α (RhoGDIα) was upregulated following myofibroblast transdifferentiation stimulated by TGF-β1. We hypothesised that RhoGDIα may induce myofibroblast transdifferentiation and thus result in silicosis. Accordingly, the biological significance of RhoGDIα in cell proliferation and apoptosis was investigated by deletion of RhoGDIα in MRC-5 cells. In addition, a mechanistic study showed that fasudil, an inhibitor of the RhoA/Rho kinase (ROCK) signalling pathway, reduced the levels of RhoGDIα, RhoA, and phospho-myosin phosphatase (phospho-MYPT) in MRC-5 cells and silicosis model rats. Knockdown of RhoGDIα inhibited myofibroblast transdifferentiation and collagen deposition through RhoGDIα/RhoA/ROCK signalling in silicosis model mice. Overall, downregulation of RhoGDIα may significantly promote cell apoptosis and inhibit cell growth, resulting in reversal of myofibroblast transdifferentiation by RhoA/ROCK in vitro and in vivo. These data will facilitate further exploration of the potential use of RhoGDIα as a target for silicosis therapy.
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Affiliation(s)
- Zhongqiu Wei
- Basic Medical College, Hebei Medical University, Shijiazhuang, China
| | - Hong Xu
- Medical Research Center, Hebei Key Laboratory for Organ Fibrosis, North China University of Science and Technology, Tangshan, China
| | - Yi Zhang
- Medical Research Center, Hebei Key Laboratory for Organ Fibrosis, North China University of Science and Technology, Tangshan, China
| | - Xue Yi
- Key Laboratory of Functional and Clinical Translational Medicine, Fujian Province University, Department of Basic Medicine, Xiamen Medical College, Xiamen, China
| | - Xinyu Yang
- Medical Research Center, Hebei Key Laboratory for Organ Fibrosis, North China University of Science and Technology, Tangshan, China
| | - Yingying Chen
- Medical Research Center, Hebei Key Laboratory for Organ Fibrosis, North China University of Science and Technology, Tangshan, China
| | - Na Mao
- Medical Research Center, Hebei Key Laboratory for Organ Fibrosis, North China University of Science and Technology, Tangshan, China
| | - Shifeng Li
- Basic Medical College, Hebei Medical University, Shijiazhuang, China
| | - Dingjie Xu
- College of Traditional Chinese Medicine, North China University of Science and Technology, Tangshan, China
| | - Shumin Li
- Basic Medicine College, North China University of Science and Technology, Tangshan, China
| | - Hui Zhang
- Medical Research Center, Hebei Key Laboratory for Organ Fibrosis, North China University of Science and Technology, Tangshan, China
| | - Dan Li
- Medical Research Center, Hebei Key Laboratory for Organ Fibrosis, North China University of Science and Technology, Tangshan, China
| | - Guizhen Zhang
- Medical Research Center, Hebei Key Laboratory for Organ Fibrosis, North China University of Science and Technology, Tangshan, China
| | - Bonan Zhang
- Basic Medicine College, North China University of Science and Technology, Tangshan, China
| | - Fuyu Jin
- Medical Research Center, Hebei Key Laboratory for Organ Fibrosis, North China University of Science and Technology, Tangshan, China
| | - Xuemin Gao
- Basic Medical College, Hebei Medical University, Shijiazhuang, China
| | - Wenchen Cai
- College of Preventive Medicine, North China University of Science and Technology, Tangshan, China
| | - Lijuan Zhang
- Medical Research Center, Hebei Key Laboratory for Organ Fibrosis, North China University of Science and Technology, Tangshan, China
| | - Ruimin Wang
- Medical Research Center, Hebei Key Laboratory for Organ Fibrosis, North China University of Science and Technology, Tangshan, China
| | - Fang Yang
- Basic Medical College, Hebei Medical University, Shijiazhuang, China.
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Ota T, Jiang YS, Fujiwara M, Tatsuka M. Apoptosis‑independent cleavage of RhoGDIβ at Asp19 during PMA‑stimulated differentiation of THP‑1 cells to macrophages. Mol Med Rep 2017; 15:1722-1726. [PMID: 28260067 PMCID: PMC5365007 DOI: 10.3892/mmr.2017.6199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 01/05/2017] [Indexed: 01/19/2023] Open
Abstract
Rho GDP-dissociation inhibitor β (RhoGDIβ), a regulator of the Rho family of proteins, is expressed abundantly in the hematopoietic cell lineage. During apoptosis of hematopoietic cells, RhoGDIβ is cleaved by caspase-3 at Asp19 and this cleaved form (Δ19-RhoGDIβ) has been implicated in the apoptotic pathway. To clarify the role of RhoGDIβ in hematopoietic cells, the present study performed immunoblotting and immunofluorescence staining to examine the expression of RhoGDIβ and ∆19-RhoGDIβ during phorbol 12-myristate 13-acetate (PMA)-stimulated differentiation of human THP-1 monocytic cells to macrophages. During differentiation of the THP-1 cells to macrophages, the expression of RhoGDIβ remained stable; however, the expression of Δ19-RhoGDIβ increased, particularly in well-spreading, non-apoptotic cells, which differentiated into macrophages. These results suggested that Δ19-RhoGDIβ has an apoptosis-independent role in the PMA-induced differentiation of THP-1 cells to macrophages.
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Affiliation(s)
- Takahide Ota
- Division of Tumor Biology, Department of Life Science, Medical Research Institute, Kanazawa Medical University, Uchinada, Ishikawa 920‑02, Japan
| | - Yong-Sheng Jiang
- Department of Oncology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Mamoru Fujiwara
- Department of Life Sciences, Life and Environmental Sciences, Prefectural University of Hiroshima, Shoubara, Hiroshima 727‑0023, Japan
| | - Masaaki Tatsuka
- Department of Life Sciences, Life and Environmental Sciences, Prefectural University of Hiroshima, Shoubara, Hiroshima 727‑0023, Japan
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Distinct expression patterns of the GDP dissociation inhibitor protein gene (OsRhoGDI2) from Oryza sativa during development and abiotic stresses. Biologia (Bratisl) 2016. [DOI: 10.1515/biolog-2016-0146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Li GY, Wang YJ, Zhao TJ, Peng Y. Signaling pathways related to role of hepatic sinusoidal endothelial cells in liver fibrosis. Shijie Huaren Xiaohua Zazhi 2016; 24:3933-3939. [DOI: 10.11569/wcjd.v24.i28.3933] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Liver fibrosis is the pathological preprocess of liver cirrhosis or liver cancer progressing from chronic liver disease. Hepatic sinusoidal endothelial cells (HSECs) are involved in the formation and development of liver fibrosis through multiple signaling pathways. In this paper, we summarize and elaborate these signaling pathways including Rho-GTPase, CXCR7-Id1/FGFR1-CXCR4, VEGFR-2/p38 mitogen-activated protein kinases (MAPK), MAPK, and TLRs. Based on these signaling pathways, we put forward new ideas for the prevention and treatment of liver fibrosis.
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10
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Song W, Li W, Li L, Zhang S, Yan X, Wen X, Zhang X, Tian H, Li A, Hu JF, Cui J. Friend leukemia virus integration 1 activates the Rho GTPase pathway and is associated with metastasis in breast cancer. Oncotarget 2016; 6:23764-75. [PMID: 26156017 PMCID: PMC4695150 DOI: 10.18632/oncotarget.4350] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 06/11/2015] [Indexed: 01/22/2023] Open
Abstract
Breast cancer is the most prevalent malignant disease in women worldwide. In patients with breast cancer, metastasis to distant sites directly determines the survival outcome. However, the molecular mechanism underlying metastasis in breast cancer remains to be defined. In this report, we found that Friend leukemia virus integration 1 (FLI1) proto-oncogene was differentially expressed between the aggressive MDA-MB231 and the non-aggressive MCF-7 breast cancer cells. Congruently, immunohistochemical staining of clinical samples revealed that FLI1 was overexpressed in breast cancers as compared with the adjacent tissues. The abundance of FLI1 protein was strongly correlated with the advanced stage, poor differentiation, and lymph node metastasis in breast cancer patients. Knockdown of FLI1 with small interfering RNAs significantly attenuated the potential of migration and invasion in highly metastatic human breast cancer cells. FLI1 oncoprotein activated the Rho GTPase pathway that is known to play a role in tumor metastasis. This study for the first time identifies FLI1 as a clinically and functionally important target gene of metastasis, providing a rationale for developing FLI1 inhibitors in the treatment of breast cancer.
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Affiliation(s)
- Wei Song
- Cancer Center, the First Hospital of Jilin University, Changchun, China
| | - Wei Li
- Cancer Center, the First Hospital of Jilin University, Changchun, China
| | - Lingyu Li
- Cancer Center, the First Hospital of Jilin University, Changchun, China
| | - Shilin Zhang
- Cancer Center, the First Hospital of Jilin University, Changchun, China.,Stanford University Medical School, VA Palo Alto Health Care System, Palo Alto, CA, USA
| | - Xu Yan
- Cancer Center, the First Hospital of Jilin University, Changchun, China
| | - Xue Wen
- Cancer Center, the First Hospital of Jilin University, Changchun, China
| | - Xiaoying Zhang
- Cancer Center, the First Hospital of Jilin University, Changchun, China
| | - Huimin Tian
- Cancer Center, the First Hospital of Jilin University, Changchun, China
| | - Ailing Li
- Institute of Basic Medical Sciences, National Center of Biomedical Analysis, Beijing, China
| | - Ji-Fan Hu
- Cancer Center, the First Hospital of Jilin University, Changchun, China.,Stanford University Medical School, VA Palo Alto Health Care System, Palo Alto, CA, USA
| | - Jiuwei Cui
- Cancer Center, the First Hospital of Jilin University, Changchun, China
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11
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Fujiwara M, Okamoto M, Hori M, Suga H, Jikihara H, Sugihara Y, Shimamoto F, Mori T, Nakaoji K, Hamada K, Ota T, Wiedemuth R, Temme A, Tatsuka M. Radiation-Induced RhoGDIβ Cleavage Leads to Perturbation of Cell Polarity: A Possible Link to Cancer Spreading. J Cell Physiol 2016; 231:2493-505. [DOI: 10.1002/jcp.25362] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Accepted: 02/23/2016] [Indexed: 01/17/2023]
Affiliation(s)
- Mamoru Fujiwara
- Faculty of Life and Environmental Sciences; Department of Life Sciences; Prefectural University of Hiroshima; Shoubara Hiroshima Japan
| | - Mayumi Okamoto
- Faculty of Life and Environmental Sciences; Department of Life Sciences; Prefectural University of Hiroshima; Shoubara Hiroshima Japan
| | - Masato Hori
- Faculty of Life and Environmental Sciences; Department of Life Sciences; Prefectural University of Hiroshima; Shoubara Hiroshima Japan
| | - Hiroshi Suga
- Faculty of Life and Environmental Sciences; Department of Life Sciences; Prefectural University of Hiroshima; Shoubara Hiroshima Japan
| | - Hiroshi Jikihara
- Department of Health Sciences; Faculty of Human Culture and Science; Prefectural University of Hiroshima; Minami-ku Hiroshima Japan
| | - Yuka Sugihara
- Department of Health Sciences; Faculty of Human Culture and Science; Prefectural University of Hiroshima; Minami-ku Hiroshima Japan
| | - Fumio Shimamoto
- Department of Health Sciences; Faculty of Human Culture and Science; Prefectural University of Hiroshima; Minami-ku Hiroshima Japan
| | - Toshio Mori
- Radioisotope Research Center; Nara Medical University School of Medicine; Kashihara Nara Japan
| | - Koichi Nakaoji
- Research & Development Division; Pias Corporation; Kobe Japan
| | - Kazuhiko Hamada
- Research & Development Division; Pias Corporation; Kobe Japan
| | - Takahide Ota
- Department of Life Science; Medical Research Institute; Kanazawa Medical University; Uchinada Ishikawa Japan
| | - Ralf Wiedemuth
- Department of Neurosurgery; University Hospital Carl Gustav Carus; Technical University Dresden; Dresden Germany
| | - Achim Temme
- Department of Neurosurgery; University Hospital Carl Gustav Carus; Technical University Dresden; Dresden Germany
| | - Masaaki Tatsuka
- Faculty of Life and Environmental Sciences; Department of Life Sciences; Prefectural University of Hiroshima; Shoubara Hiroshima Japan
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Zheng Z, Liu B, Wu X. RhoGDI2 up-regulates P-glycoprotein expression via Rac1 in gastric cancer cells. Cancer Cell Int 2015; 15:41. [PMID: 25901126 PMCID: PMC4404694 DOI: 10.1186/s12935-015-0190-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 03/28/2015] [Indexed: 11/21/2022] Open
Abstract
Multidrug resistance (MDR) is a major clinical obstacle in treatment of gastric cancer. Previously, using 2D electrophoresis-mass spectrometry, we identified RhoGDI2 as a contributor to 5-FU resistance in colon cancer cells, and also confer gastric cancer cells resistance to 5-FU. Here, we reported RhoGDI2 also induced MDR in gastric cancer cell line (MKN-45). To explore the underlining mechanism, we detected the mRNA, protein expression, activity of P-glycoprotein (P-gp) in MKN-45 stably transfected with RhoGDI2 expressing or control vector. All the mRNA, protein level, activity were increased by 130%, 230%, 35% respectively after ectopic expression of RhoGDI2. RhoGDI2 was correlated with P-gp expression in gastric cancer tissues as detected by immunohistochemistry. To further study how RhoGDI2 up-regulates P-gp expression, we tested the activity of Rac1 in MKN-45/RhoGDI2 and MKN-45/GFP. Ectopic expression of RhoGDI2 increased Rac1 activity (P < 0.05). For more important, silencing of Rac1 expression by siRNA decreased P-gp expression to undetectable level. Overall, these findings suggest that RhoGDI2 up-regulates P-gp expression via Rac1 to induce MDR.
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Affiliation(s)
- Zhong Zheng
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University, 270 Dongan Road, Shanghai, 200032 People's Republic of China
| | - Bingya Liu
- Department of Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, and Gastroenterology, Ruijin Hospital, Jiaotong University School of Medicine, Shanghai, China
| | - Xiaohua Wu
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University, 270 Dongan Road, Shanghai, 200032 People's Republic of China
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