1
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Zhang J, Liu G, Liu Y, Yang P, Xie J, Wei X. The biological functions and related signaling pathways of SPON2. Front Oncol 2024; 13:1323744. [PMID: 38264743 PMCID: PMC10803442 DOI: 10.3389/fonc.2023.1323744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 12/20/2023] [Indexed: 01/25/2024] Open
Abstract
Spondin-2 (SPON2), also referred to as M-spondin or DIL-1, is a member of the extracellular matrix protein family known as Mindin-F-spondin (FS). SPON2 can be used as a broad-spectrum tumor marker for more than a dozen tumors, mainly prostate cancer. Meanwhile, SPON2 is also a potential biomarker for the diagnosis of certain non-tumor diseases. Additionally, SPON2 plays a pivotal role in regulating tumor metastasis and progression. In normal tissues, SPON2 has a variety of biological functions represented by promoting growth and development and cell proliferation. This paper presents a comprehensive overview of the regulatory mechanisms, diagnostic potential as a broad-spectrum biomarker, diverse biological functions, involvement in various signaling pathways, and clinical applications of SPON2.
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Affiliation(s)
- Jingrun Zhang
- Zhongshan Clinical College, Dalian University, Dalian, China
- Laboratory of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, China
| | - Ge Liu
- Laboratory of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, China
| | - Yuchen Liu
- Zhongshan Clinical College, Dalian University, Dalian, China
| | - Pei Yang
- Department of Neurology, The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Junyuan Xie
- Department of Breast Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiaowei Wei
- Laboratory of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, China
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2
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Ma ZY, Li J, Dong XH, Cui YT, Cui YF, Ban T, Huo R. The role of BRG1 in epigenetic regulation of cardiovascular diseases. Eur J Pharmacol 2023; 957:176039. [PMID: 37678658 DOI: 10.1016/j.ejphar.2023.176039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/09/2023]
Abstract
Cardiovascular diseases have been closely linked to abnormal epigenetic regulation. In the context of epigenetic regulation, BRG1, a pivotal SWI/SNF chromatin remodeling enzyme, emerges as a key epigenetic regulator with significant impact on the development and progression of cardiovascular disorders. From the perspective of epigenetic regulation of cardiovascular diseases, BRG1 emerges as a pivotal SWI/SNF chromatin remodeling enzyme, functioning as a key epigenetic regulator. It exerts substantial influence on the development and progression of cardiovascular disorders by exerting precise control over gene expression and protein levels. Therefore, a comprehensive understanding of BRG1's epigenetic regulatory role in cardiovascular disease is essential for unraveling its underlying pathophysiological mechanisms. This paper summarizes and discusses the function of BRG1 in the epigenetic regulation of cardiovascular diseases.
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Affiliation(s)
- Zi-Yue Ma
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Baojian Road, Nangang District, Harbin, 150081, PR China
| | - Jing Li
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Baojian Road, Nangang District, Harbin, 150081, PR China
| | - Xian-Hui Dong
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Baojian Road, Nangang District, Harbin, 150081, PR China
| | - Ying-Tao Cui
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Baojian Road, Nangang District, Harbin, 150081, PR China
| | - Yun-Feng Cui
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Baojian Road, Nangang District, Harbin, 150081, PR China
| | - Tao Ban
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Baojian Road, Nangang District, Harbin, 150081, PR China; National-Local Joint Engineering Laboratory of Drug Research and Development of Cardiovascular and Cerebrovascular Diseases in Frigid Zone, The National Development and Reform Commission, Baojian Road, Nangang District, Harbin, 150081, PR China; Heilongjiang Academy of Medical Sciences, Baojian Road, Nangang District, Harbin, 150081, PR China
| | - Rong Huo
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Baojian Road, Nangang District, Harbin, 150081, PR China.
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3
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Rana I, Kataria S, Tan TL, Hajam EY, Kashyap DK, Saha D, Ajnabi J, Paul S, Jayappa S, Ananthan ASHP, Kumar P, Zaarour RF, Haarshaadri J, Kansagara G, Rizvi A, Zirmire RK, Badarinath K, Khedkar SU, Chandra Y, Samuel R, George R, Danda D, Jacob PM, Dey R, Dhandapany PS, He YW, Varga J, Varghese S, Jamora C. Mindin (SPON2) Is Essential for Cutaneous Fibrogenesis in a Mouse Model of Systemic Sclerosis. J Invest Dermatol 2022; 143:699-710.e10. [PMID: 36528128 DOI: 10.1016/j.jid.2022.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 10/02/2022] [Accepted: 10/04/2022] [Indexed: 12/16/2022]
Abstract
Systemic sclerosis is a fibrotic disease that initiates in the skin and progresses to internal organs, leading to a poor prognosis. Unraveling the etiology of a chronic, multifactorial disease such as systemic sclerosis has been aided by various animal models that recapitulate certain aspects of the human pathology. We found that the transcription factor SNAI1 is overexpressed in the epidermis of patients with systemic sclerosis, and a transgenic mouse recapitulating this expression pattern is sufficient to induce many clinical features of the human disease. Using this mouse model as a discovery platform, we have uncovered a critical role for the matricellular protein Mindin (SPON2) in fibrogenesis. Mindin is produced by SNAI1 transgenic skin keratinocytes and aids fibrogenesis by inducing early inflammatory cytokine production and collagen secretion in resident dermal fibroblasts. Given the dispensability of Mindin in normal tissue physiology, targeting this protein holds promise as an effective therapy for fibrosis.
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Affiliation(s)
- Isha Rana
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India; School of Chemical and Biotechnology, Shanmugha Arts, Science, Technology and Research Academy (SASTRA) Deemed University, Thanjavur, India
| | - Sunny Kataria
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India; National Centre for Biological Sciences, Bangalore, India
| | - Tuan Lin Tan
- Department of Bioengineering, Jacobs School of Engineering, University of California San Diego, San Diego, California, USA; School of Chemical & Life Sciences, Singapore Polytechnic, Singapore, Singapore
| | - Edries Yousaf Hajam
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India; School of Chemical and Biotechnology, Shanmugha Arts, Science, Technology and Research Academy (SASTRA) Deemed University, Thanjavur, India
| | - Deepak Kumar Kashyap
- Centre for Cardiovascular Biology and Disease, Institute for Stem Cell Science and Regenerative Medicine, Bangalore, India; Centre for Cellular and Molecular Biology, Hyderabad, India
| | - Dyuti Saha
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India; Manipal Academy of Higher Education (MAHE), Manipal, India
| | - Johan Ajnabi
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India
| | - Sayan Paul
- Centre for Cardiovascular Biology and Disease, Institute for Stem Cell Science and Regenerative Medicine, Bangalore, India
| | - Shashank Jayappa
- Centre for Cardiovascular Biology and Disease, Institute for Stem Cell Science and Regenerative Medicine, Bangalore, India
| | - Akhil S H P Ananthan
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India
| | - Pankaj Kumar
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India
| | - Rania F Zaarour
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India; Thumbay Research Institute for Precision Medicine (TRIPM), Gulf Medical University, Ajman, United Arab Emirates
| | - J Haarshaadri
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India
| | - Gaurav Kansagara
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India; Animal Care and Resource Centre (ACRC), Bangalore Life Science Cluster, Bangalore, India
| | - Abrar Rizvi
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India
| | - Ravindra K Zirmire
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India; School of Chemical and Biotechnology, Shanmugha Arts, Science, Technology and Research Academy (SASTRA) Deemed University, Thanjavur, India
| | - Krithika Badarinath
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India; National Centre for Biological Sciences, Bangalore, India
| | - Sneha Uday Khedkar
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India
| | - Yogesh Chandra
- Animal Care and Resource Centre (ACRC), Bangalore Life Science Cluster, Bangalore, India
| | - Rekha Samuel
- Centre for Stem Cell Research (CSCR), Christian Medical College Vellore, Vellore, India; Department of Pathology, Manipal - Tata Medical College Jamshedpur, Jamshedpur, India
| | - Renu George
- Department of Dermatology, Venereology and Leprosy, Christian Medical College Vellore, Vellore, India
| | - Debashish Danda
- Department of Clinical Immunology & Rheumatology, Christian Medical College Vellore, Vellore, India
| | | | - Rakesh Dey
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India
| | | | - You-Wen He
- Department of Immunology, Duke University School of Medicine, Durham, North Carolina, USA
| | - John Varga
- Department of Internal Medicine, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Shyni Varghese
- Department of Bioengineering, Jacobs School of Engineering, University of California San Diego, San Diego, California, USA; Department of Biomedical Engineering, Duke University, Durham, North Carolina, USA; Department of Mechanical Engineering & Materials Science, Duke University, Durham, North Carolina, USA; Department of Orthopaedic Surgery, Duke University School of Medicine, Durham, North Carolina, USA
| | - Colin Jamora
- IFOM-inStem Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science & Regenerative Medicine, Bangalore, India.
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Fan Z, Kong M, Dong W, Dong C, Miao X, Guo Y, Liu X, Miao S, Li L, Chen T, Qu Y, Yu F, Duan Y, Lu Y, Zou X. Trans-activation of eotaxin-1 by Brg1 contributes to liver regeneration. Cell Death Dis 2022; 13:495. [PMID: 35614068 PMCID: PMC9132924 DOI: 10.1038/s41419-022-04944-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 05/10/2022] [Accepted: 05/12/2022] [Indexed: 12/14/2022]
Abstract
Infiltration of eosinophils is associated with and contributes to liver regeneration. Chemotaxis of eosinophils is orchestrated by the eotaxin family of chemoattractants. We report here that expression of eotaxin-1 (referred to as eotaxin hereafter), but not that of either eotaxin-2 or eotaxin-3, were elevated, as measured by quantitative PCR and ELISA, in the proliferating murine livers compared to the quiescent livers. Similarly, exposure of primary murine hepatocytes to hepatocyte growth factor (HGF) stimulated eotaxin expression. Liver specific deletion of Brahma-related gene 1 (Brg1), a chromatin remodeling protein, attenuated eosinophil infiltration and down-regulated eotaxin expression in mice. Brg1 deficiency also blocked HGF-induced eotaxin expression in cultured hepatocytes. Further analysis revealed that Brg1 could directly bind to the proximal eotaxin promoter to activate its transcription. Mechanistically, Brg1 interacted with nuclear factor kappa B (NF-κB)/RelA to activate eotaxin transcription. NF-κB knockdown or pharmaceutical inhibition disrupted Brg1 recruitment to the eotaxin promoter and blocked eotaxin induction in hepatocytes. Adenoviral mediated over-expression of eotaxin overcame Brg1 deficiency caused delay in liver regeneration in mice. On the contrary, eotaxin depletion with RNAi or neutralizing antibodies retarded liver regeneration in mice. More important, Brg1 expression was detected to be correlated with eotaxin expression and eosinophil infiltration in human liver specimens. In conclusion, our data unveil a novel role of Brg1 as a regulator of eosinophil trafficking by activating eotaxin transcription.
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Affiliation(s)
- Zhiwen Fan
- grid.428392.60000 0004 1800 1685Department of Pathology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China ,grid.428392.60000 0004 1800 1685Department of Gastroenterology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Ming Kong
- grid.89957.3a0000 0000 9255 8984Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Wenhui Dong
- grid.89957.3a0000 0000 9255 8984Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Chunlong Dong
- grid.410745.30000 0004 1765 1045Department of Hepatobiliary Surgery, Nanjing Drum Tower Hospital, Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xiulian Miao
- grid.411351.30000 0001 1119 5892College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Yan Guo
- grid.411351.30000 0001 1119 5892College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Xingyu Liu
- grid.411351.30000 0001 1119 5892College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Shuying Miao
- grid.428392.60000 0004 1800 1685Department of Pathology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Lin Li
- grid.428392.60000 0004 1800 1685Department of Pathology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Tingting Chen
- grid.428392.60000 0004 1800 1685Department of Pathology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Yeqing Qu
- grid.428392.60000 0004 1800 1685Experimental Animal Center, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Fei Yu
- grid.428392.60000 0004 1800 1685Experimental Animal Center, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Yunfei Duan
- grid.490563.d0000000417578685Department of Hepatobiliary Surgery, the First People’s Hospital of Changzhou, the Third Hospital Affiliated with Soochow University, Changzhou, China
| | - Yunjie Lu
- grid.490563.d0000000417578685Department of Hepatobiliary Surgery, the First People’s Hospital of Changzhou, the Third Hospital Affiliated with Soochow University, Changzhou, China
| | - Xiaoping Zou
- grid.428392.60000 0004 1800 1685Department of Gastroenterology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
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5
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Li N, Liu H, Xue Y, Chen J, Kong X, Zhang Y. Upregulation of Neogenin-1 by a CREB1-BAF47 Complex in Vascular Endothelial Cells is Implicated in Atherogenesis. Front Cell Dev Biol 2022; 10:803029. [PMID: 35186922 PMCID: PMC8851423 DOI: 10.3389/fcell.2022.803029] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 01/10/2022] [Indexed: 12/29/2022] Open
Abstract
Atherosclerosis is generally considered a human pathology of chronic inflammation, to which endothelial dysfunction plays an important role. Here we investigated the role of neogenin 1 (Neo-1) in oxidized low-density lipoprotein (oxLDL) induced endothelial dysfunction focusing on its transcriptional regulation. We report that Neo-1 expression was upregulated by oxLDL in both immortalized vascular endothelial cells and primary aortic endothelial cells. Neo-1 knockdown attenuated whereas Neo-1 over-expression enhanced oxLDL-induced leukocyte adhesion to endothelial cells. Neo-1 regulated endothelial-leukocyte interaction by modulating nuclear factor kappa B (NF-κB) activity to alter the expression of adhesion molecules. Neo-1 blockade with a blocking antibody ameliorated atherogenesis in Apoe−/− mice fed a Western diet. Ingenuity pathway analysis combined with validation assays confirmed that cAMP response element binding protein 1 (CREB1) and Brg1-associated factor 47 (BAF47) mediated oxLDL induced Neo-1 upregulation. CREB1 interacted with BAF47 and recruited BAF47 to the proximal Neo-1 promoter leading to Neo-1 trans-activation. In conclusion, our data delineate a novel transcriptional mechanism underlying Neo-1 activation in vascular endothelial cells that might contribute to endothelial dysfunction and atherosclerosis.
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Affiliation(s)
- Nan Li
- Department of Human Anatomy, Nanjing Medical University, Nanjing, China
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Hong Liu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Yujia Xue
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Junliang Chen
- Department of Pathophysiology, Wuxi Medical School, Jiangnan University, Wuxi, China
| | - Xiaocen Kong
- Department of Endocrinology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
- Institute of Biomedical Research, Liaocheng Univeristy, Liaocheng, China
- *Correspondence: Xiaocen Kong, ; Yuanyuan Zhang,
| | - Yuanyuan Zhang
- Hainan Provincial Key Laboratory for Tropical Cardiovascular Diseases Research, Key Laboratory of Emergency and Trauma of Ministry of Education, Department of Cardiology, The First Affiliated Hospital of Hainan Medical University, Haikou, China
- *Correspondence: Xiaocen Kong, ; Yuanyuan Zhang,
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6
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Li S, Tao W, Huang Z, Yan L, Chen B, Zeng C, Chen F. The Transcriptional Landscapes and Key Genes in Brain Arteriovenous Malformation Progression in a Venous Hypertension Rat Model Revealed by RNA Sequencing. J Inflamm Res 2022; 15:1381-1397. [PMID: 35250290 PMCID: PMC8893156 DOI: 10.2147/jir.s347754] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 02/04/2022] [Indexed: 01/23/2023] Open
Abstract
Background Brain arteriovenous malformations (bAVM) are abnormal vascular lesions characterized by direct connections between arteries and veins without an intervening capillary bed. The primary goal for brain AVM treatment is to prevent rupture and hemorrhage; however, the underlying molecular mechanisms are still unknown. Methods We constructed venous hypertension (VH) rat model with end-to-end anastomosis of the proximal left common carotid artery and the left distal external jugular vein. Thirty-eight adult rats were randomly assigned to four groups: the 0-week (n=5), the 1-week VH group (n=12), the 3-week VH group (n=9), and the 6-week VH group (n=12). We measured the hemodynamics and diameter of the arterialized veins. An RNA sequencing of arterialized veins was conducted, followed by comprehensive bioinformatics analysis to identify key genes and biological pathways involved in VH progression. The candidate genes from RNA-Seq were validated by RT-qPCR and immunostaining in human tissues. Results We observed high-flow and low resistance characteristics in VH models. A total of 317 upregulated and 258 downregulated common genes were consistently differentially expressed during VH progression. Thirteen co-expression modules were obtained by WGCNA analysis, and 4 key modules were identified. Thirteen genes: Adamts8, Adamtsl3, Spon2, Adamtsl2, Chad, Itga7, Comp, Itga8, Bmp6, Fst, Smad6, Smad7, Grem1, and Nog with differential expressions were identified using the density of maximum neighborhood component (DMNC) algorithm in Cytohubba. The expression of five potential genes (Adamts8, Adamtsl3, Spon2, Adamtsl2, Itga8) were increased in RT-qPCR, while in human bAVM tissue, the protein levels of Adamtsl2 and Itga8 were significant elevated and Spon2 and Adamtsl3 were decreased. Conclusion The identified gene networks of Adamtsl3, Spon2, Adamtsl2, and Itga8 provided key genes for further intervention.
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Affiliation(s)
- Shifu Li
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, People’s Republic of China
| | - Wengui Tao
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, People’s Republic of China
| | - Zheng Huang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, People’s Republic of China
| | - Langchao Yan
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, People’s Republic of China
| | - Bo Chen
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, People’s Republic of China
| | - Chudai Zeng
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, People’s Republic of China
| | - Fenghua Chen
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, People’s Republic of China
- Correspondence: Fenghua Chen, Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, People’s Republic of China, Email
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7
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Fan Z, Kong M, Miao X, Guo Y, Ren H, Wang J, Wang S, Tang N, Shang L, Zhu Z, Liu H, Zhu W, Shi X. An E2F5-TFDP1-BRG1 Complex Mediates Transcriptional Activation of MYCN in Hepatocytes. Front Cell Dev Biol 2021; 9:742319. [PMID: 34746136 PMCID: PMC8569672 DOI: 10.3389/fcell.2021.742319] [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: 07/16/2021] [Accepted: 10/04/2021] [Indexed: 12/22/2022] Open
Abstract
Liver regeneration is characterized by cell cycle reentrance of hepatocytes. N-Myc, encoded by MYCN, is a member of the Myc family of transcription factors. Elevation of MYCN expression has been noted in the course of liver regeneration whereas the underlying mechanism remains unclear. Here we describe that up-regulation of MYCN expression, as measured by quantitative PCR, Western blotting, and immunohistochemical staining, paralleled liver regeneration in animal and cell models. MYCN expression was up-regulated as a result of transcriptional activation. Ingenuity pathway analysis (IPA) revealed several up-stream transcriptional regulators for MYCN and RNA interference validated E2F5 and TFDP1 as essential for hepatocyte growth factor (HGF)-induced MYCN trans-activation. Further examination showed that deficiency of BRG1, a chromatin remodeling protein, attenuated MYCN induction during liver regeneration. BRG1 interacted with and was recruited by E2F5/TFDP1 to the MYCN promoter. Mechanistically, BRG1 might play a role regulating histone H3 acetylation and H3K4 trimethylation and facilitating/stabilizing the binding of RNA polymerase II surrounding the MYCN promoter. Over-expression of ectopic MYCN in BRG1-null hepatocytes overcame deficiency of proliferation. Importantly, a positive correlation between MYCN expression and BRG1/E2F5/TFDP1 expression was observed in human liver specimens. In conclusion, our data identify a novel epigenetic pathway where an E2F5-TFDP1-BRG1 complex regulates MYCN transcription to promote liver regeneration.
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Affiliation(s)
- Zhiwen Fan
- Department of Hepatobiliary Surgery, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.,Hepatobiliary Institute, Nanjing University, Nanjing, China
| | - Ming Kong
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Translational Medicine, and Center for Experimental Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Xiulian Miao
- College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Yan Guo
- College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Haozhen Ren
- Department of Hepatobiliary Surgery, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.,Hepatobiliary Institute, Nanjing University, Nanjing, China
| | - Jinglin Wang
- Department of Hepatobiliary Surgery, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.,Hepatobiliary Institute, Nanjing University, Nanjing, China
| | - Shuai Wang
- Department of Hepatobiliary Surgery, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.,Hepatobiliary Institute, Nanjing University, Nanjing, China
| | - Ning Tang
- Department of Hepatobiliary Surgery, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.,Hepatobiliary Institute, Nanjing University, Nanjing, China
| | - Longcheng Shang
- Department of Hepatobiliary Surgery, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Zhengyi Zhu
- Department of Hepatobiliary Surgery, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Hanyi Liu
- Department of Hepatobiliary Surgery, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Wei Zhu
- Department of Anesthesiology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Xiaolei Shi
- Department of Hepatobiliary Surgery, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.,Hepatobiliary Institute, Nanjing University, Nanjing, China
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8
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HES5-mediated repression of LIGHT transcription may contribute to apoptosis in hepatocytes. Cell Death Discov 2021; 7:308. [PMID: 34689159 PMCID: PMC8542050 DOI: 10.1038/s41420-021-00707-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/04/2021] [Accepted: 10/06/2021] [Indexed: 11/26/2022] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is prototypical form of metabolic syndrome and has become a global pandemic. Hepatocytes undergo apoptosis in the pathogenesis of NAFLD. We report that the lymphokine LIGHT/TNFSF14 was upregulated in the murine NAFLD livers and in hepatocytes treated with free fatty acids (palmitate, PA). LIGHT knockdown or neutralization attenuated PA-induced apoptosis of hepatocytes. Similarly, knockdown or blockade of LTβR, the receptor for LIGHT, ameliorated apoptosis in hepatocytes exposed to PA. Ingenuity pathway analysis (IPA) revealed several Notch-related transcription factors as upstream regulators of LIGHT, of which HES5 expression was downregulated paralleling LIGHT induction in the pathogenesis of NAFLD. HES5 knockdown enhanced whereas HES5 over-expression weakened LIGHT induction in hepatocytes. HES5 was found to directly bind to the LIGHT promoter and repress LIGHT transcription. Mechanistically, HES5 interacted with SIRT1 to deacetylate histone H3/H4 on the LIGHT promoter to repress LIGHT transcription. SIRT1 knockdown or inhibition offset the effect of HES5 over-expression on LIGHT transcription and hepatocyte apoptosis. In conclusion, our data unveil a novel mechanism that might contribute to excessive apoptosis in hepatocyte exposed to free fatty acids.
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9
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Lv F, Shao T, Xue Y, Miao X, Guo Y, Wang Y, Xu Y. Dual Regulation of Tank Binding Kinase 1 by BRG1 in Hepatocytes Contributes to Reactive Oxygen Species Production. Front Cell Dev Biol 2021; 9:745985. [PMID: 34660604 PMCID: PMC8517266 DOI: 10.3389/fcell.2021.745985] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/15/2021] [Indexed: 01/14/2023] Open
Abstract
Excessive accumulation of reactive oxygen species (ROS) is considered a major culprit for the pathogenesis of non-alcoholic fatty liver disease (NAFLD). We have previously shown that deletion of Brahma related gene 1 (BRG1) mitigated NAFLD in mice in part by attenuating ROS production in hepatocyte. Here we report that BRG1 deletion led to simultaneous down-regulation in expression and phosphorylation of tank binding kinase 1 (TBK1) in vivo and in vitro. On the one hand, BRG1 interacted with AP-1 to bind to the TBK1 promoter and directly activated TBK1 transcription in hepatocytes. On the other hand, BRG1 interacted with Sp1 to activate the transcription of c-SRC, a tyrosine kinase essential for TBK1 phosphorylation. Over-expression of c-SRC and TBK1 corrected the deficiency in ROS production in BRG1-null hepatocytes whereas depletion of TBK1 or c-SRC attenuated ROS production. In conclusion, our data suggest that dual regulation of TBK1 activity, at the transcription level and the post-transcriptional level, by BRG1 may constitute an important mechanism underlying excessive ROS production in hepatocytes.
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Affiliation(s)
- Fangqiao Lv
- Department of Cell Biology, Municipal Laboratory for Liver Protection and Regulation of Regeneration, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Tinghui Shao
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Yujia Xue
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Xiulian Miao
- College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Yan Guo
- College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Yutong Wang
- Department of Cell Biology, Municipal Laboratory for Liver Protection and Regulation of Regeneration, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yong Xu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China.,College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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10
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Chen B, Dong W, Shao T, Miao X, Guo Y, Liu X, Feng Y. A KDM4-DBC1-SIRT1 Axis Contributes to TGF-b Induced Mesenchymal Transition of Intestinal Epithelial Cells. Front Cell Dev Biol 2021; 9:697614. [PMID: 34631698 PMCID: PMC8493255 DOI: 10.3389/fcell.2021.697614] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 08/31/2021] [Indexed: 12/13/2022] Open
Abstract
Intestinal fibrosis is one of the common pathophysiological processes in inflammatory bowel diseases (IBDs). Previously it has been demonstrated that epithelial-mesenchymal transition (EMT) can contribute to the development of intestinal fibrosis. Here we report that conditional ablation of SIRT1, a class III lysine deacetylase, in intestinal epithelial cells exacerbated 2, 4, 6-trinitro-benzene sulfonic acid (TNBS) induced intestinal fibrosis in mice. SIRT1 activity, but not SIRT1 expression, was down-regulated during EMT likely due to up-regulation of its inhibitor deleted in breast cancer 1 (DBC1). TGF-β augmented the recruitment of KDM4A, a histone H3K9 demethylase, to the DBC1 promoter in cultured intestinal epithelial cells (IEC-6) leading to DBC1 trans-activation. KDM4A depletion or inhibition abrogated DBC1 induction by TGF-β and normalized SIRT1 activity. In addition, KDM4A deficiency attenuated TGF-β induced EMT in IEC-6 cells. In conclusion, our data identify a KDM4-DBC1-SIRT1 pathway that regulates EMT to contribute to intestinal fibrosis.
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Affiliation(s)
- Baoyu Chen
- Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Wenhui Dong
- Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Tinghui Shao
- Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Xiulian Miao
- College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Yan Guo
- College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Xingyu Liu
- College of Life Sciences and Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Yifei Feng
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.,The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
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11
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Kong M, Dong W, Zhu Y, Fan Z, Miao X, Guo Y, Li C, Duan Y, Lu Y, Li Z, Xu Y. Redox-sensitive activation of CCL7 by BRG1 in hepatocytes during liver injury. Redox Biol 2021; 46:102079. [PMID: 34454163 PMCID: PMC8406035 DOI: 10.1016/j.redox.2021.102079] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 07/04/2021] [Accepted: 07/20/2021] [Indexed: 12/14/2022] Open
Abstract
Liver injuries induced by various stimuli share in common an acute inflammatory response, in which circulating macrophages home to the liver parenchyma to participate in the regulation of repair, regeneration, and fibrosis. In the present study we investigated the role of hepatocyte-derived C-C motif ligand 7 (CCL7) in macrophage migration during liver injury focusing on its transcriptional regulation. We report that CCL7 expression was up-regulated in the liver by lipopolysaccharide (LPS) injection (acute liver injury) or methionine-and-choline-deficient (MCD) diet feeding (chronic liver injury) paralleling increased macrophage infiltration. CCL7 expression was also inducible in hepatocytes, but not in hepatic stellate cells or in Kupffer cells, by LPS treatment or exposure to palmitate in vitro. Hepatocyte-specific deletion of Brahma-related gene 1 (BRG1), a chromatin remodeling protein, resulted in a concomitant loss of CCL7 induction and macrophage infiltration in the murine livers. Of interest, BRG1-induced CCL7 transcription and macrophage migration was completely blocked by the antioxidant N-acetylcystine. Further analyses revealed that BRG1 interacted with activator protein 1 (AP-1) to regulate CCL7 transcription in hepatocytes in a redox-sensitive manner mediated in part by casein kinase 2 (CK2)-catalyzed phosphorylation of BRG1. Importantly, a positive correlation between BRG1/CCL7 expression and macrophage infiltration was identified in human liver biopsy specimens. In conclusion, our data unveil a novel role for BRG1 as a redox-sensitive activator of CCL7 transcription.
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Affiliation(s)
- Ming Kong
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Wenhui Dong
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Yuwen Zhu
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Zhiwen Fan
- Department of Pathology, Affiliated Nanjing Drum Tower Hospital of Nanjing University School of Medicine, Nanjing, China
| | - Xiulian Miao
- College of Life Sciences and Institute of Biomedical Research, Liaocheng University, China
| | - Yan Guo
- College of Life Sciences and Institute of Biomedical Research, Liaocheng University, China
| | - Chengping Li
- College of Life Sciences and Institute of Biomedical Research, Liaocheng University, China
| | - Yunfei Duan
- Department of Hepatobiliary and Pancreatic Surgery, The First People's Hospital of Changzhou, The Third Hospital Affiliated to Soochow University, Changzhou, China
| | - Yunjie Lu
- Department of Hepatobiliary and Pancreatic Surgery, The First People's Hospital of Changzhou, The Third Hospital Affiliated to Soochow University, Changzhou, China.
| | - Zilong Li
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing, China.
| | - Yong Xu
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China; College of Life Sciences and Institute of Biomedical Research, Liaocheng University, China.
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12
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Kong M, Dong W, Xu H, Fan Z, Miao X, Guo Y, Li C, Ye Q, Wang Y, Xu Y. Choline Kinase Alpha Is a Novel Transcriptional Target of the Brg1 in Hepatocyte: Implication in Liver Regeneration. Front Cell Dev Biol 2021; 9:705302. [PMID: 34422825 PMCID: PMC8377418 DOI: 10.3389/fcell.2021.705302] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 07/20/2021] [Indexed: 12/14/2022] Open
Abstract
Liver regeneration is a key compensatory process in response to liver injury serving to contain damages and to rescue liver functions. Hepatocytes, having temporarily exited the cell cycle after embryogenesis, resume proliferation to regenerate the injured liver parenchyma. In the present study we investigated the transcriptional regulation of choline kinase alpha (Chka) in hepatocytes in the context of liver regeneration. We report that Chka expression was significantly up-regulated in the regenerating livers in the partial hepatectomy (PHx) model and the acetaminophen (APAP) injection model. In addition, treatment with hepatocyte growth factor (HGF), a strong pro-proliferative cue, stimulated Chka expression in primary hepatocytes. Chka depletion attenuated HGF-induced proliferation of hepatocytes as evidenced by quantitative PCR and Western blotting measurements of pro-proliferative genes as well as EdU incorporation into replicating DNA. Of interest, deletion of Brahma-related gene 1 (Brg1), a chromatin remodeling protein, attenuated Chka induction in the regenerating livers in mice and in cultured hepatocytes. Further analysis revealed that Brg1 interacted with hypoxia-inducible factor 1 alpha (HIF-1α) to directly bind to the Chka promoter and activate Chka transcription. Finally, examination of human acute liver failure (ALF) specimens identified a positive correlation between Chka expression and Brg1 expression. In conclusion, our data suggest that Brg1-dependent trans-activation of Chka expression may contribute to liver regeneration.
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Affiliation(s)
- Ming Kong
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Department of Pathophysiology, Collaborative Innovation Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Wenhui Dong
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Department of Pathophysiology, Collaborative Innovation Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Huihui Xu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Department of Pathophysiology, Collaborative Innovation Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Zhiwen Fan
- Institute of Biomedical Research, Liaocheng University, Liaocheng, China.,Department of Pathology, Nanjing Drum Tower Hospital Affiliated with Nanjing University School of Medicine, Nanjing, China
| | - Xiulian Miao
- Institute of Biomedical Research, Liaocheng University, Liaocheng, China.,College of Life Sciences, Liaocheng University, Liaocheng, China
| | - Yan Guo
- Institute of Biomedical Research, Liaocheng University, Liaocheng, China.,College of Life Sciences, Liaocheng University, Liaocheng, China
| | - Chengping Li
- Institute of Biomedical Research, Liaocheng University, Liaocheng, China.,College of Life Sciences, Liaocheng University, Liaocheng, China
| | - Qing Ye
- Division of Life Sciences and Medicine, Department of Pathology, The First Affiliated Hospital, University of Science and Technology of China, Hefei, China.,Division of Life Sciences and Medicine, Intelligent Pathology Institute, University of Science and Technology of China, Hefei, China
| | - Yutong Wang
- Department of Cell Biology, The Municipal Laboratory of Liver Protection and Regulation of Regeneration, School of Basic Medical Sciences, Beijing, China
| | - Yong Xu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Department of Pathophysiology, Collaborative Innovation Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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13
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Yang Y, Wang H, Zhao H, Miao X, Guo Y, Zhuo L, Xu Y. A GSK3-SRF Axis Mediates Angiotensin II Induced Endothelin Transcription in Vascular Endothelial Cells. Front Cell Dev Biol 2021; 9:698254. [PMID: 34381779 PMCID: PMC8350349 DOI: 10.3389/fcell.2021.698254] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 07/09/2021] [Indexed: 12/14/2022] Open
Abstract
Endothelin, encoded by ET1, is a vasoactive substance primarily synthesized in vascular endothelial cells (VECs). Elevation of endothelin levels, due to transcriptional hyperactivation, has been observed in a host of cardiovascular diseases. We have previously shown that serum response factor (SRF) is a regulator of ET1 transcription in VECs. Here we report that angiotensin II (Ang II) induced ET1 transcription paralleled activation of glycogen synthase kinase 3 (GSK3) in cultured VECs. GSK3 knockdown or pharmaceutical inhibition attenuated Ang II induced endothelin expression. Of interest, the effect of GSK3 on endothelin transcription relied on the conserved SRF motif within the ET1 promoter. Further analysis revealed that GSK3 interacted with and phosphorylated SRF at serine 224. Phosphorylation of SRF by GSK3 did not influence its recruitment to the ET1 promoter. Instead, GSK3-mediated SRF phosphorylation potentiated its interaction with MRTF-A, a key co-factor for SRF, which helped recruit the chromatin remodeling protein BRG1 to the ET1 promoter resulting in augmented histone H3 acetylation/H3K4 trimethylation. Consistently, over-expression of a constitutively active GSK enhanced Ang II-induced ET1 transcription and knockdown of either MRTF-A or BRG1 abrogated the enhancement of ET1 transcription. In conclusion, our data highlight a previously unrecognized mechanism that contributes to the transcriptional regulation of endothelin. Targeting this GSK3-SRF axis may yield novel approaches in the intervention of cardiovascular diseases.
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Affiliation(s)
- Yuyu Yang
- Jiangsu Key Laboratory for Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Huidi Wang
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Hongwei Zhao
- Jiangsu Key Laboratory for Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Xiulian Miao
- Institute of Biomedical Research, Liaocheng University, Liaocheng, China.,College of Life Sciences, Liaocheng University, Liaocheng, China
| | - Yan Guo
- Institute of Biomedical Research, Liaocheng University, Liaocheng, China.,College of Life Sciences, Liaocheng University, Liaocheng, China
| | - Lili Zhuo
- Department of Geriatrics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yong Xu
- Institute of Biomedical Research, Liaocheng University, Liaocheng, China.,Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
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14
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Chen B, Zhu Y, Chen J, Feng Y, Xu Y. Activation of TC10-Like Transcription by Lysine Demethylase KDM4B in Colorectal Cancer Cells. Front Cell Dev Biol 2021; 9:617549. [PMID: 34249900 PMCID: PMC8260841 DOI: 10.3389/fcell.2021.617549] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 04/06/2021] [Indexed: 12/19/2022] Open
Abstract
Malignant colorectal cancers (CRCs) are characterized by enhanced migration and invasion thus acquiring the ability to metastasize. We have previously shown that the small GTPase TC10-like (TCL) contributes to aggressive migration and invasion in malignant CRC cells. TCL expression is differentially expressed in CRC cells and can be upregulated by hypoxia although the underlying epigenetic mechanism is not fully appreciated. Here, we report that differential TCL expression in CRC cells appeared to be associated with histone H3K9 methylation. RNAi screening revealed that the lysine demethylase KDM4B was essential for TCL transcription in CRC cells. KDM4B interacted with and was recruited by the sequence-specific transcription factor ETS-related gene 1 (ERG1) to the TCL promoter to activate transcription. Mechanistically, KDM4B mediated H3K9 demethylase facilitated the assembly of pre-initiation complex (PIC) on the TCL promoter. KDM4B knockdown attenuated migration and invasion of CRC cells. Importantly, KDM4B expression was upregulated in human CRC specimens of advanced stages compared to those of lower grades and associated with poor prognosis. Together, these data uncover a novel epigenetic mechanism underlying malignant transformation of CRC cells and suggest that KDM4B may be considered as a therapeutic target in CRC intervention.
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Affiliation(s)
- Baoyu Chen
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Yuwen Zhu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Junliang Chen
- Department of Pathophysiology, Wuxi Medical School, Jiangnan University, Wuxi, China
| | - Yifei Feng
- Department of Colorectal Surgery, The First Hospital Affiliated With Nanjing Medical University, Nanjing, China.,Department of General Surgery, The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Yong Xu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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15
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Zhang Z, Chen B, Zhu Y, Zhang T, Yuan Y, Zhang X, Xu Y. The Jumonji Domain-Containing Histone Demethylase Homolog 1D/lysine Demethylase 7A (JHDM1D/KDM7A) Is an Epigenetic Activator of RHOJ Transcription in Breast Cancer Cells. Front Cell Dev Biol 2021; 9:664375. [PMID: 34249916 PMCID: PMC8262595 DOI: 10.3389/fcell.2021.664375] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 04/08/2021] [Indexed: 12/12/2022] Open
Abstract
The small GTPase RHOJ is a key regulator of breast cancer metastasis by promoting cell migration and invasion. The prometastatic stimulus TGF-β activates RHOJ transcription via megakaryocytic leukemia 1 (MKL1). The underlying epigenetic mechanism is not clear. Here, we report that MKL1 deficiency led to disrupted assembly of the RNA polymerase II preinitiation complex on the RHOJ promoter in breast cancer cells. This could be partially explained by histone H3K9/H3K27 methylation status. Further analysis confirmed that the H3K9/H3K27 dual demethylase JHDM1D/KDM7A was essential for TGF-β-induced RHOJ transcription in breast cancer cells. MKL1 interacted with and recruited KDM7A to the RHOJ promoter to cooperatively activate RHOJ transcription. KDM7A knockdown attenuated migration and invasion of breast cancer cells in vitro and mitigated the growth and metastasis of breast cancer cells in nude mice. KDM7A expression level, either singularly or in combination with that of RHOJ, could be used to predict prognosis in breast cancer patients. Of interest, KDM7A appeared to be a direct transcriptional target of TGF-β signaling. A SMAD2/SMAD4 complex bound to the KDM7A promoter and mediated TGF-β-induced KDM7A transcription. In conclusion, our data unveil a novel epigenetic mechanism whereby TGF-β regulates the transcription of the prometastatic small GTPase RHOJ. Screening for small-molecule inhibitors of KDM7A may yield effective therapeutic solutions to treat malignant breast cancers.
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Affiliation(s)
- Ziyu Zhang
- Key Laboratory of Women's Reproductive Health of Jiangxi, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, China.,Central Laboratory, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, China
| | - Baoyu Chen
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Yuwen Zhu
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Tianyi Zhang
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Yibiao Yuan
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Xiaoling Zhang
- School of Medicine, Nanchang University, Nanchang, China.,Department of Gynecology, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, China
| | - Yong Xu
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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16
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Zhou P, Xiang CX, Wei JF. The clinical significance of spondin 2 eccentric expression in peripheral blood mononuclear cells in bronchial asthma. J Clin Lab Anal 2021; 35:e23764. [PMID: 33998076 PMCID: PMC8183911 DOI: 10.1002/jcla.23764] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/04/2021] [Accepted: 03/06/2021] [Indexed: 12/18/2022] Open
Abstract
Background Bronchial asthma (BA) was a heterogeneous disease characterized by chronic airway inflammation. Spondin 2 (SPON2) was reported to be implicated in the integrin pathway, protein metabolism, and drug‐induced lupus erythematosus. The purpose of this study was to evaluate the significance of SPON2 in BA diagnosis and treatment. Methods Peripheral blood samples were obtained from 137 BA pediatric patients (61 mild‐to‐moderate BA and 76 severe BA) and 59 healthy children. Subject's information, clinical indexes, pulmonary ventilation functions were recorded in the two groups. Peripheral blood mononuclear cells (PBMCs) were isolated from patients’ samples. qRT‐PCR and ELISA assays were employed to examine the levels of SPON2 and inflammatory cytokines, respectively. Pearson's correlation analysis confirmed the association between SPON2 and inflammatory cytokines. Receiver operating characteristic (ROC) analysis was used to evaluate the potentials of SPON2 in terms of BA detection and discriminating against the severity of BA. Results Bioinformatics analysis showed that SPON2, OLFM4, XIST, and TSIX were significantly upregulated, while KDM5D and RPS4Y1 were reduced in BA. GO analysis verified that these six genes were mainly involved in neutrophil degranulation, neutrophil activation involved in immune response, neutrophil activation, and neutrophil‐mediated immunity. After isolating PBMCs, we found that SPON2 was remarkably increased in BA pediatric group compared with healthy children, and the relative levels of SPON2 were related to the severity of BA. The receiver operating characteristic (ROC) analysis revealed the high potentials of SPON2 in BA diagnosis (AUC was 0.8080) and severity distinctions (AUCs were 0.7341 and 0.8541, respectively). Also, we found that there were significant differences in fractional exhaled nitric oxide (FeNO), forced expiratory volume in 1 s (FEV1)%, FEV1/ forced vital capacity (FVC)%, immunoglobulin E (IgE), serum eosinophils, and serum neutrophils between mild‐to‐moderate BA group and severe BA group. Finally, SPON2 was negatively correlated with IL‐12 while positively associated with IL‐4, IL‐13, and IL‐17A. Conclusions SPON2 was a viable biomarker for diagnosing and degree of severity in BA, providing more insight into exploring BA and treatment's pathogenesis.
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Affiliation(s)
- Peng Zhou
- Department of Pediatric, Shengzhou People's Hospital (the First Affiliated Hospital of Zhejiang University Shengzhou Branch), Shengzhou, China
| | - Cai-Xia Xiang
- Department of Pediatric, Shengzhou People's Hospital (the First Affiliated Hospital of Zhejiang University Shengzhou Branch), Shengzhou, China
| | - Jin-Feng Wei
- Department of Respiratory, Hangzhou Children's Hospital, Hangzhou, China
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17
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Liu L, Zhao Q, Lin L, Yang G, Yu L, Zhuo L, Yang Y, Xu Y. Myeloid MKL1 Disseminates Cues to Promote Cardiac Hypertrophy in Mice. Front Cell Dev Biol 2021; 9:583492. [PMID: 33898415 PMCID: PMC8063155 DOI: 10.3389/fcell.2021.583492] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 01/04/2021] [Indexed: 12/11/2022] Open
Abstract
Cardiac hypertrophy is a key pathophysiological process in the heart in response to stress cues. Although taking place in cardiomyocytes, the hypertrophic response is influenced by other cell types, both within the heart and derived from circulation. In the present study we investigated the myeloid-specific role of megakaryocytic leukemia 1 (MKL1) in cardiac hypertrophy. Following transverse aortic constriction (TAC), myeloid MKL1 conditional knockout (MFCKO) mice exhibit an attenuated phenotype of cardiac hypertrophy compared to the WT mice. In accordance, the MFCKO mice were protected from excessive cardiac inflammation and fibrosis as opposed to the WT mice. Conditioned media collected from macrophages enhanced the pro-hypertrophic response in cardiomyocytes exposed to endothelin in an MKL1-dependent manner. Of interest, expression levels of macrophage derived miR-155, known to promote cardiac hypertrophy, were down-regulated in the MFCKO mice compared to the WT mice. MKL1 depletion or inhibition repressed miR-155 expression in macrophages. Mechanistically, MKL1 interacted with NF-κB to activate miR-155 transcription in macrophages. In conclusion, our data suggest that MKL1 may contribute to pathological hypertrophy via regulating macrophage-derived miR-155 transcription.
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Affiliation(s)
- Li Liu
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China.,Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Qianwen Zhao
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Lin Lin
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Guang Yang
- Department of Pathology, Suzhou Municipal Hospital Affiliated with Nanjing Medical University, Suzhou, China
| | - Liming Yu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Lili Zhuo
- Department of Geriatrics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yuyu Yang
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Yong Xu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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18
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Dong W, Zhu Y, Zhang Y, Fan Z, Zhang Z, Fan X, Xu Y. BRG1 Links TLR4 Trans-Activation to LPS-Induced SREBP1a Expression and Liver Injury. Front Cell Dev Biol 2021; 9:617073. [PMID: 33816466 PMCID: PMC8012493 DOI: 10.3389/fcell.2021.617073] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 02/26/2021] [Indexed: 12/12/2022] Open
Abstract
Multiple organ failure is one of the most severe consequences in patients with septic shock. Liver injury is frequently observed during this pathophysiological process. In the present study we investigated the contribution of Brahma related gene 1 (BRG1), a chromatin remodeling protein, to septic shock induced liver injury. When wild type (WT) and liver conditional BRG1 knockout (LKO) mice were injected with lipopolysaccharide (LPS), liver injury was appreciably attenuated in the LKO mice compared to the WT mice as evidenced by plasma ALT/AST levels, hepatic inflammation and apoptosis. Of interest, there was a down-regulation of sterol response element binding protein 1a (SREBP1a), known to promote liver injury, in the LKO livers compared to the WT livers. BRG1 did not directly bind to the SREBP1a promoter. Instead, BRG1 was recruited to the toll-like receptor 4 (TLR4) promoter and activated TLR4 transcription. Ectopic TLR4 restored SREBP1a expression in BRG1-null hepatocytes. Congruently, adenovirus carrying TLR4 or SREBP1a expression vector normalized liver injury in BRG1 LKO mice injected with LPS. Finally, a positive correlation between BRG1 and TLR4 expression was detected in human liver biopsy specimens. In conclusion, our data demonstrate that a BRG1-TLR4-SREBP1a axis that mediates LPS-induced liver injury in mice.
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Affiliation(s)
- Wenhui Dong
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Yuwen Zhu
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Yangxi Zhang
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Zhiwen Fan
- Department of Pathology, Affiliated Nanjing Drum Tower Hospital of Nanjing University School of Medicine, Nanjing, China
| | - Ziyu Zhang
- Key Laboratory of Women's Reproductive Health of Jiangxi, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, China.,Central Laboratory, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, China
| | - Xiangshan Fan
- Department of Pathology, Affiliated Nanjing Drum Tower Hospital of Nanjing University School of Medicine, Nanjing, China
| | - Yong Xu
- Key Laboratory of Targeted Invention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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19
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Kong M, Zhu Y, Shao J, Fan Z, Xu Y. The Chromatin Remodeling Protein BRG1 Regulates SREBP Maturation by Activating SCAP Transcription in Hepatocytes. Front Cell Dev Biol 2021; 9:622866. [PMID: 33718362 PMCID: PMC7947303 DOI: 10.3389/fcell.2021.622866] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 02/08/2021] [Indexed: 12/14/2022] Open
Abstract
Sterol response element binding protein (SREBP) is a master regulator of cellular lipogenesis. One key step in the regulation of SREBP activity is its sequential cleavage and trans-location by several different proteinases including SREBP cleavage activating protein (SCAP). We have previously reported that Brahma related gene 1 (BRG1) directly interacts with SREBP1c and SREBP2 to activate pro-lipogenic transcription in hepatocytes. We report here that BRG1 deficiency resulted in reduced processing and nuclear accumulation of SREBP in the murine livers in two different models of non-alcoholic steatohepatitis (NASH). Exposure of hepatocytes to lipopolysaccharide (LPS) and palmitate (PA) promoted SREBP accumulation in the nucleus whereas BRG1 knockdown or inhibition blocked SREBP maturation. Further analysis revealed that BRG1 played an essential role in the regulation of SCAP expression. Mechanistically, BRG1 interacted with Sp1 and directly bound to the SCAP promoter to activate SCAP transcription. Forced expression of exogenous SCAP partially rescued the deficiency in the expression of SREBP target genes in BRG1-null hepatocytes. In conclusion, our data uncover a novel mechanism by which BRG1 contributes to SREBP-dependent lipid metabolism.
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Affiliation(s)
- Ming Kong
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Yuwen Zhu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Jing Shao
- Wu Medical School, Jiangnan University, Wuxi, China
| | - Zhiwen Fan
- Department of Pathology, Affiliated Nanjing Drum Tower Hospital of Nanjing University School of Medicine, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Yong Xu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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20
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Hong W, Kong M, Qi M, Bai H, Fan Z, Zhang Z, Sun A, Fan X, Xu Y. BRG1 Mediates Nephronectin Activation in Hepatocytes to Promote T Lymphocyte Infiltration in ConA-Induced Hepatitis. Front Cell Dev Biol 2021; 8:587502. [PMID: 33553140 PMCID: PMC7858674 DOI: 10.3389/fcell.2020.587502] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 12/10/2020] [Indexed: 12/12/2022] Open
Abstract
Fulminant hepatitis (FH) is a major cause of acute liver failure. Concanavalin A (ConA) belongs to the lectin family and is frequently used as an inducer of FH in animal models. ConA induced FH is characterized by massive accumulation of T lymphocytes in the liver. A host of chemoattractive substances are known to promote T cell homing to the liver during acute hepatitis. Here we investigated the involvement of Brahma-related gene 1 (BRG1), a chromatin remodeling protein, in FH. BRG1-flox mice were crossed to Alb-Cre mice to generate hepatocyte conditional BRG1 knockout (LKO) mice. The mice were peritoneally injected with a single dose of ConA to induce FH. BRG1 deficiency mitigated ConA-induced FH in mice. Consistently, there were fewer T lymphocyte infiltrates in the LKO livers compared to the wild type (WT) livers paralleling downregulation of T cell specific cytokines. Further analysis revealed that BRG1 deficiency repressed the expression of several chemokines critical for T cell homing including nephronectin (Npnt). BRG1 knockdown blocked the induction of Npnt in hepatocytes and attenuated T lymphocyte migration in vitro, which was reversed by the addition of recombinant nephronectin. Mechanistically, BRG1 interacted with β-catenin to directly bind to the Npnt promoter and activate Npnt transcription. Importantly, a positive correlation between infiltration of CD3+ T lymphocyes and nephronectin expression was detected in human acute hepatitis biopsy specimens. In conclusion, our data identify a novel role for BRG1 as a promoter of T lymphocyte trafficking by activating Npnt transcription in hepatocytes. Targeting the BRG1-Npnt axis may yield novel therapeutic solutions for FH.
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Affiliation(s)
- Wenxuan Hong
- Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Ming Kong
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medicine, Nanjing, China
| | - Mengwen Qi
- Laboratory Center for Experimental Medicine, Department of Clinical Medicine, Jiangsu Health Vocational College, Nanjing, China
| | - Hui Bai
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medicine, Nanjing, China
| | - Zhiwen Fan
- Department of Pathology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Ziyu Zhang
- Key Laboratory of Women's Reproductive Health of Jiangxi, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, China.,Central Laboratory, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, China
| | - Aijun Sun
- Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Xiangshan Fan
- Department of Pathology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Yong Xu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medicine, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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21
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Wu X, Dong W, Zhang T, Ren H, Wang J, Shang L, Zhu Z, Zhu W, Shi X, Xu Y. Epiregulin (EREG) and Myocardin Related Transcription Factor A (MRTF-A) Form a Feedforward Loop to Drive Hepatic Stellate Cell Activation. Front Cell Dev Biol 2021; 8:591246. [PMID: 33520984 PMCID: PMC7843934 DOI: 10.3389/fcell.2020.591246] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/28/2020] [Indexed: 12/14/2022] Open
Abstract
Trans-differentiation of quiescent hepatic stellate cells (HSC) into myofibroblast cells is considered the linchpin of liver fibrosis. A myriad of signaling pathways contribute to HSC activation and consequently liver fibrosis. Epidermal growth factor (EGF) family of cytokines signal through the cognate receptor EGFR to promote HSC activation. In the present study we investigated the transcription regulation of epiregulin (EREG), an EGFR ligand, during HSC activation. We report that EREG expression was significantly up-regulated in activated HSCs compared to quiescent HSCs isolated from mice. In addition, there was an elevation of EREG expression in HSCs undergoing activation in vitro. Of interest, deficiency of myocardin-related transcription factor A (MRTF-A), a well-documented regulator of HSC trans-differentiation, attenuated up-regulation of EREG expression both in vivo and in vitro. Further analysis revealed that MRTF-A interacted with serum response factor (SRF) to bind directly to the EREG promoter and activate EREG transcription. EREG treatment promoted HSC activation in vitro, which was blocked by MRTF-A depletion or inhibition. Mechanistically, EREG stimulated nuclear trans-location of MRTF-A in HSCs. Together, our data portray an EREG-MRTF-A feedforward loop that contributes to HSC activation and suggest that targeting the EREG-MRTF-A axis may yield therapeutic solutions against liver fibrosis.
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Affiliation(s)
- Xiaoyan Wu
- Department of Hepatobiliary Surgery, The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.,Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Translational Medicine, and Center for Experimental Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Wenhui Dong
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Translational Medicine, and Center for Experimental Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Tianyi Zhang
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Translational Medicine, and Center for Experimental Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Haozhen Ren
- Department of Hepatobiliary Surgery, The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.,Hepatobiliary Institute, Nanjing University, Nanjing, China
| | - Jinglin Wang
- Department of Hepatobiliary Surgery, The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.,Hepatobiliary Institute, Nanjing University, Nanjing, China
| | - Longcheng Shang
- Department of Hepatobiliary Surgery, The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Zhengyi Zhu
- Department of Hepatobiliary Surgery, The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Wei Zhu
- Department of Anesthesiology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Xiaolei Shi
- Department of Hepatobiliary Surgery, The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.,Hepatobiliary Institute, Nanjing University, Nanjing, China
| | - Yong Xu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Translational Medicine, and Center for Experimental Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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22
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Epigenetic activation of the small GTPase TCL contributes to colorectal cancer cell migration and invasion. Oncogenesis 2020; 9:86. [PMID: 32999272 PMCID: PMC7528090 DOI: 10.1038/s41389-020-00269-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 08/21/2020] [Accepted: 09/10/2020] [Indexed: 01/25/2023] Open
Abstract
TC10-like (TCL) is a small GTPase that has been implicated in carcinogenesis. Elevated TCL expression has been observed in many different types of cancers although the underlying epigenetic mechanism is poorly understood. Here we report that TCL up-regulation was associated with high malignancy in both human colorectal cancer biopsy specimens and in cultured colorectal cancer cells. Hypoxia, a pro-metastatic stimulus, up-regulated TCL expression in HT-29 cells. Further studies revealed that myocardin-related transcription factor A (MRTF-A) promoted migration and invasion of HT-29 cells in a TCL-dependent manner. MRTF-A directly bound to the proximal TCL promoter in response to hypoxia to activate TCL transcription. Chromatin immunoprecipitation (ChIP) assay showed that hypoxia stimulation specifically enhanced acetylation of histone H4K16 surrounding the TCL promoter, which was abolished by MRTF-A depletion or inhibition. Mechanistically, MRTF-A interacted with and recruited the H4K16 acetyltransferase hMOF to the TCL promoter to cooperatively regulate TCL transcription. hMOF depletion or inhibition attenuated hypoxia-induced TCL expression and migration/invasion of HT-29 cells. In conclusion, our data identify a novel MRTF-A-hMOF-TCL axis that contributes to colorectal cancer metastasis.
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