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Liu L, Ge W, Zhang Z, Li Y, Xie M, Zhao C, Yao C, Luo C, Wu Z, Wang W, Zhao D, Zhang J, Qiu W, Wang Y. Sublytic C5b-9 triggers glomerular mesangial cell proliferation via enhancing FGF1 and PDGFα gene transcription mediated by GCN5-dependent SOX9 acetylation in rat Thy-1 nephritis. FASEB J 2021; 35:e21751. [PMID: 34156114 DOI: 10.1096/fj.202002814rr] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 05/28/2021] [Accepted: 06/08/2021] [Indexed: 12/14/2022]
Abstract
Rat Thy-1 nephritis (Thy-1N) is an animal model of human mesangioproliferative glomerulonephritis (MsPGN), accompanied by glomerular mesangial cell (GMC) proliferation and extracellular matrix (ECM) deposition. Although sublytic C5b-9 formed on GMC membrane could induce cell proliferation, the mechanism is still unclear. In this study, we first demonstrated that the level of SRY related HMG-BOX gene 9 (SOX9), general control nonderepressible 5 (GCN5), fibroblast growth factor 1 (FGF1) and platelet-derived growth factor α (PDGFα) was all elevated both in the renal tissues of Thy-1N rats (in vivo) and in the GMCs (in vitro) with sublytic C5b-9 stimulation. Then, we not only discovered that sublytic C5b-9 caused GMC proliferation through increasing SOX9, GCN5, FGF1 and PDGFα expression, but also proved that SOX9 and GCN5 formed a complex and combined with FGF1 and PDGFα promoters, leading to FGF1 and PDGFα gene transcription. More importantly, GCN5 could mediate SOX9 acetylation at lysine 62 (K62) to enhance SOX9 binding to FGF1 or PDGFα promoter and promote FGF1 or PDGFα synthesis and GMC proliferation. Besides, the experiments in vivo also showed that FGF1 and PDGFα expression, GMC proliferation and urinary protein secretion in Thy-1N rats were greatly reduced by silencing renal SOX9, GCN5, FGF1 or PDGFα gene. Furthermore, the renal tissues of MsPGN patients also exhibited positive expression of these genes mentioned above. Collectively, our findings indicate that GCN5, SOX9 and FGF1/PDGFα can form an axis and play an essential role in sublytic C5b-9-triggered GMC proliferation, which might provide a novel insight into the pathogenesis of Thy-1N and MsPGN.
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Affiliation(s)
- Longfei Liu
- Key Laboratory of Immunological Environment and Disease, Department of Immunology, Nanjing Medical University, Nanjing, China.,Department of Central Laboratory, The Affiliated Huaian No. 1 People's Hospital, Nanjing Medical University, Huai'an, China
| | - Wen Ge
- Key Laboratory of Immunological Environment and Disease, Department of Immunology, Nanjing Medical University, Nanjing, China
| | - Zhiwei Zhang
- Key Laboratory of Immunological Environment and Disease, Department of Immunology, Nanjing Medical University, Nanjing, China
| | - Ya Li
- Key Laboratory of Immunological Environment and Disease, Department of Immunology, Nanjing Medical University, Nanjing, China
| | - Mengxiao Xie
- Department of Laboratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Chenhui Zhao
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Chunlei Yao
- Department of Nephrology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Can Luo
- Key Laboratory of Immunological Environment and Disease, Department of Immunology, Nanjing Medical University, Nanjing, China
| | - Zhijiao Wu
- Key Laboratory of Immunological Environment and Disease, Department of Immunology, Nanjing Medical University, Nanjing, China
| | - Wenbo Wang
- Key Laboratory of Immunological Environment and Disease, Department of Immunology, Nanjing Medical University, Nanjing, China
| | - Dan Zhao
- Key Laboratory of Immunological Environment and Disease, Department of Immunology, Nanjing Medical University, Nanjing, China
| | - Jing Zhang
- Key Laboratory of Immunological Environment and Disease, Department of Immunology, Nanjing Medical University, Nanjing, China
| | - Wen Qiu
- Key Laboratory of Immunological Environment and Disease, Department of Immunology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Technology of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Yingwei Wang
- Key Laboratory of Immunological Environment and Disease, Department of Immunology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Technology of Ministry of Health, Nanjing Medical University, Nanjing, China
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2
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Xie M, Wu Z, Ying S, Liu L, Zhao C, Yao C, Zhang Z, Luo C, Wang W, Zhao D, Zhang J, Qiu W, Wang Y. Sublytic C5b-9 induces glomerular mesangial cell proliferation via ERK1/2-dependent SOX9 phosphorylation and acetylation by enhancing Cyclin D1 in rat Thy-1 nephritis. Exp Mol Med 2021; 53:572-590. [PMID: 33811247 PMCID: PMC8102557 DOI: 10.1038/s12276-021-00589-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 02/07/2021] [Accepted: 02/09/2021] [Indexed: 02/01/2023] Open
Abstract
Glomerular mesangial cell (GMC) proliferation is a histopathological alteration in human mesangioproliferative glomerulonephritis (MsPGN) or in animal models of MsPGN, e.g., the rat Thy-1 nephritis (Thy-1N) model. Although sublytic C5b-9 assembly on the GMC membrane can trigger cell proliferation, the mechanisms are still undefined. We found that sublytic C5b-9-induced rat GMC proliferation was driven by extracellular signal-regulated kinase 1/2 (ERK1/2), sry-related HMG-box 9 (SOX9), and Cyclin D1. Here, ERK1/2 phosphorylation was a result of the calcium influx-PKC-α-Raf-MEK1/2 axis activated by sublytic C5b-9, and Cyclin D1 gene transcription was enhanced by ERK1/2-dependent SOX9 binding to the Cyclin D1 promoter (-582 to -238 nt). In addition, ERK1/2 not only interacted with SOX9 in the cell nucleus to mediate its phosphorylation at serine residues 64 (a new site identified by mass spectrometry) and 181 (a known site), but also indirectly induced SOX9 acetylation by elevating the expression of general control non-repressed protein 5 (GCN5), which together resulted in Cyclin D1 synthesis and GMC proliferation. Moreover, our in vivo experiments confirmed that silencing these genes ameliorated the lesions of Thy-1N rats and reduced SOX9 phosphorylation, acetylation and Cyclin D1 expression. Furthermore, the renal tissue sections of MsPGN patients also showed higher phosphorylation or expression of ERK1/2, SOX9, and Cyclin D1. In summary, these findings suggest that sublytic C5b-9-induced GMC proliferation in rat Thy-1N requires SOX9 phosphorylation and acetylation via enhanced Cyclin D1 gene transcription, which may provide a new insight into human MsPGN pathogenesis.
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Affiliation(s)
- Mengxiao Xie
- grid.89957.3a0000 0000 9255 8984Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, 101 Longmian Road, Nanjing, Jiangsu 211166 China ,grid.412676.00000 0004 1799 0784Department of Laboratory Medicine, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, Jiangsu 210029 China
| | - Zhijiao Wu
- grid.89957.3a0000 0000 9255 8984Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, 101 Longmian Road, Nanjing, Jiangsu 211166 China
| | - Shuai Ying
- grid.89957.3a0000 0000 9255 8984Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, 101 Longmian Road, Nanjing, Jiangsu 211166 China
| | - Longfei Liu
- grid.89957.3a0000 0000 9255 8984Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, 101 Longmian Road, Nanjing, Jiangsu 211166 China ,grid.89957.3a0000 0000 9255 8984Department of Central Laboratory, The Affiliated Huaian No. 1 People’s Hospital, Nanjing Medical University, One West Huanghe Road, Huai’an, Jiangsu 223300 China
| | - Chenhui Zhao
- grid.412676.00000 0004 1799 0784Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, Jiangsu 210029 China
| | - Chunlei Yao
- grid.412676.00000 0004 1799 0784Department of Nephrology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, Jiangsu 210029 China
| | - Zhiwei Zhang
- grid.89957.3a0000 0000 9255 8984Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, 101 Longmian Road, Nanjing, Jiangsu 211166 China
| | - Can Luo
- grid.89957.3a0000 0000 9255 8984Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, 101 Longmian Road, Nanjing, Jiangsu 211166 China
| | - Wenbo Wang
- grid.89957.3a0000 0000 9255 8984Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, 101 Longmian Road, Nanjing, Jiangsu 211166 China
| | - Dan Zhao
- grid.89957.3a0000 0000 9255 8984Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, 101 Longmian Road, Nanjing, Jiangsu 211166 China
| | - Jing Zhang
- grid.89957.3a0000 0000 9255 8984Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, 101 Longmian Road, Nanjing, Jiangsu 211166 China
| | - Wen Qiu
- grid.89957.3a0000 0000 9255 8984Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, 101 Longmian Road, Nanjing, Jiangsu 211166 China ,grid.89957.3a0000 0000 9255 8984Key Laboratory of Antibody Technology of Ministry of Health, Nanjing Medical University, Nanjing, Jiangsu 211166 China
| | - Yingwei Wang
- grid.89957.3a0000 0000 9255 8984Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, 101 Longmian Road, Nanjing, Jiangsu 211166 China ,grid.89957.3a0000 0000 9255 8984Key Laboratory of Antibody Technology of Ministry of Health, Nanjing Medical University, Nanjing, Jiangsu 211166 China
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3
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Che N, Sun X, Gu L, Wang X, Shi J, Sun Y, Xu L, Liu R, Wang J, Zhu F, Peng N, Xiao F, Hu D, Lu L, Qiu W, Zhang M. Adiponectin Enhances B-Cell Proliferation and Differentiation via Activation of Akt1/STAT3 and Exacerbates Collagen-Induced Arthritis. Front Immunol 2021; 12:626310. [PMID: 33815378 PMCID: PMC8012765 DOI: 10.3389/fimmu.2021.626310] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 02/08/2021] [Indexed: 12/12/2022] Open
Abstract
Although B cells have been shown to contribute to the pathogenesis of rheumatoid arthritis (RA), the precise role of B cells in RA needs to be explored further. Our previous studies have revealed that adiponectin (AD) is expressed at high levels in inflamed synovial joint tissues, and its expression is closely correlated with progressive bone erosion in patients with RA. In this study, we investigated the possible role of AD in B cell proliferation and differentiation. We found that AD stimulation could induce B cell proliferation and differentiation in cell culture. Notably, local intraarticular injection of AD promoted B cell expansion in joint tissues and exacerbated arthritis in mice with collagen-induced arthritis (CIA). Mechanistically, AD induced the activation of PI3K/Akt1 and STAT3 and promoted the proliferation and differentiation of B cells. Moreover, STAT3 bound to the promoter of the Blimp-1 gene, upregulated Blimp-1 expression at the transcriptional level, and promoted B cell differentiation. Collectively, we observed that AD exacerbated CIA by enhancing B cell proliferation and differentiation mediated by the PI3K/Akt1/STAT3 axis.
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Affiliation(s)
- Nan Che
- Department of Rheumatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xiaoxuan Sun
- Department of Rheumatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Lei Gu
- Department of Rheumatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xiaohui Wang
- Department of Pathology, Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong, China
- Chongqing International Institute for Immunology, Hong Kong, China
| | - Jingjing Shi
- Clinical Medical Science of the First Clinical Medical College, Nanjing Medical University, Nanjing, China
| | - Yi Sun
- Clinical Medical Science of the First Clinical Medical College, Nanjing Medical University, Nanjing, China
| | - Lingxiao Xu
- Department of Rheumatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Rui Liu
- Department of Rheumatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Junke Wang
- Department of Rheumatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Fengyi Zhu
- Department of Rheumatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Na Peng
- Department of Rheumatology and Nephrology, The Second People's Hospital of China Three Gorges University, Yichang, China
| | - Fan Xiao
- Department of Pathology, Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong, China
- Chongqing International Institute for Immunology, Hong Kong, China
| | - Dajun Hu
- Department of Rheumatology and Nephrology, The Second People's Hospital of China Three Gorges University, Yichang, China
| | - Liwei Lu
- Department of Pathology, Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong, China
- Chongqing International Institute for Immunology, Hong Kong, China
| | - Wen Qiu
- Department of Immunology, Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, Nanjing, China
| | - Miaojia Zhang
- Department of Rheumatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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4
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The effectiveness of chitosan-mediated silencing of PDGF-B and PDGFR-β in the mesangial proliferative glomerulonephritis therapy. Exp Mol Pathol 2019; 110:104280. [DOI: 10.1016/j.yexmp.2019.104280] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 06/18/2019] [Accepted: 06/28/2019] [Indexed: 12/13/2022]
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5
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Yu T, Wang L, Zhao C, Qian B, Yao C, He F, Zhu Y, Cai M, Li M, Zhao D, Zhang J, Wang Y, Qiu W. Sublytic C5b-9 induces proliferation of glomerular mesangial cells via ERK5/MZF1/RGC-32 axis activated by FBXO28-TRAF6 complex. J Cell Mol Med 2019; 23:5654-5671. [PMID: 31184423 PMCID: PMC6653533 DOI: 10.1111/jcmm.14473] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 04/06/2019] [Accepted: 05/15/2019] [Indexed: 12/17/2022] Open
Abstract
Mesangioproliferative glomerulonephritis (MsPGN) is characterized by the proliferation of glomerular mesangial cells (GMCs) and accumulation of extracellular matrix (ECM), followed by glomerulosclerosis and renal failure of patients. Although our previous studies have demonstrated that sublytic C5b‐9 complex formed on the GMC membrane could trigger GMC proliferation and ECM expansion of rat Thy‐1 nephritis (Thy‐1N) as an animal model of MsPGN, their mechanisms are still not fully elucidated. In the present studies, we found that the levels of response gene to complement 32 (RGC‐32), myeloid zinc finger 1 (MZF1), phosphorylated extracellular signal‐regulated kinase 5 (phosphorylated ERK5, p‐ERK5), F‐box only protein 28 (FBXO28) and TNF receptor‐associated factor 6 (TRAF6) were all markedly up‐regulated both in the renal tissues of rats with Thy‐1N (in vivo) and in the GMCs upon sublytic C5b‐9 stimulation (in vitro). Further in vitro experiments revealed that up‐regulated FBXO28 and TRAF6 could form protein complex binding to ERK5 and enhance ERK5 K63‐ubiquitination and subsequent phosphorylation. Subsequently, ERK5 activation contributed to MZF1 expression and MZF1‐dependent RGC‐32 up‐regulation, finally resulting in GMC proliferative response. Furthermore, the MZF1‐binding element within RGC‐32 promoter and the functions of FBXO28 domains were identified. Additionally, knockdown of renal FBXO28, TRAF6, ERK5, MZF1 and RGC‐32 genes respectively markedly reduced GMC proliferation and ECM production in Thy‐1N rats. Together, these findings indicate that sublytic C5b‐9 induces GMC proliferative changes in rat Thy‐1N through ERK5/MZF1/RGC‐32 axis activated by the FBXO28‐TRAF6 complex, which might provide a new insight into MsPGN pathogenesis.
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Affiliation(s)
- Tianyi Yu
- Department of Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Lulu Wang
- Department of Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Chenhui Zhao
- Department of Medicine, First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Baomei Qian
- Department of Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Chunlei Yao
- Department of Medicine, First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Fengxia He
- Department of Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Yufeng Zhu
- Clinical Medical Science of the First Clinical Medical College, Nanjing Medical University, Nanjing, People's Republic of China
| | - Mengyuan Cai
- Clinical Medical Science of the First Clinical Medical College, Nanjing Medical University, Nanjing, People's Republic of China
| | - Mei Li
- The Laboratory Center for Basic Medical Sciences, Nanjing medical University, Nanjing, People's Republic of China
| | - Dan Zhao
- Department of Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Jing Zhang
- Department of Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Yingwei Wang
- Department of Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Wen Qiu
- Department of Immunology, Nanjing Medical University, Nanjing, People's Republic of China.,Key Laboratory of Human Functional Genomics of Jiangsu Province, Nanjing medical University, Nanjing, People's Republic of China
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6
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Wang B, Zhao CH, Sun G, Zhang ZW, Qian BM, Zhu YF, Cai MY, Pandey S, Zhao D, Wang YW, Qiu W, Shi L. IL-17 induces the proliferation and migration of glioma cells through the activation of PI3K/Akt1/NF-κB-p65. Cancer Lett 2019; 447:93-104. [PMID: 30660646 DOI: 10.1016/j.canlet.2019.01.008] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/08/2018] [Accepted: 01/07/2019] [Indexed: 01/08/2023]
Abstract
Interleukin 17 (IL-17), as a pro-inflammatory cytokine, is up-regulated in the sera and tumor tissues of glioma patients; however the effects of IL-17 on glioma proliferation and migration remain unclear. In this study, the roles of IL-17 in the proliferation and migration of glioma cells and their potential mechanisms were determined. The results showed that IL-17 could not only enhance the proliferation and migration of cultured glioma cells (in vitro), but also promote the tumor formation of glioma cells in BALB/c nude mice (in vivo). Mechanical exploration revealed that IL-17 stimulation could increase the phosphorylation levels of Akt1 and NF-κB-p65 in glioma cells, and knockdown or inhibition of PI3K, Akt1 and NF-κB-p65 could also reduce the IL-17-induced proliferation and migration of the glioma cells. Moreover, PI3K/Akt1 was the upstream regulator of NF-κB-p65 activation in IL-17-incubated glioma cells. Furthermore, the inhibition of PI3K, Akt1 and NF-κB-p65 markedly suppressed the tumor formation of glioma cells induced by IL-17. Together, these data indicate that IL-17 can promote the proliferation and migration of glioma cells via PI3K/Akt1/NF-κB-p65 activation, and these findings might provide a new insight into glioma pathogenesis.
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Affiliation(s)
- Bin Wang
- Department of Neurosurgery, The First People's Hospital of Kunshan affiliated with Jiangsu University, Suzhou, Jiangsu, 215300, PR China
| | - Chen-Hui Zhao
- Department of Oncology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, PR China
| | - Guan Sun
- Department of Neurosurgery, The Fourth Affiliated Hospital of Nantong University, Yancheng City No.1 people's hospital, Yancheng, Jiangsu, 224000, PR China
| | - Zhi-Wei Zhang
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, PR China
| | - Bao-Mei Qian
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, PR China
| | - Yu-Feng Zhu
- Clinical Medical Science of the First Clinical Medical College, Nanjing Medical University, Nanjing, Jiangsu, 211166, PR China
| | - Meng-Yuan Cai
- Clinical Medical Science of the First Clinical Medical College, Nanjing Medical University, Nanjing, Jiangsu, 211166, PR China
| | - Samjhana Pandey
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, PR China
| | - Dan Zhao
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, PR China
| | - Ying-Wei Wang
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, PR China
| | - Wen Qiu
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, PR China.
| | - Lei Shi
- Department of Neurosurgery, The First People's Hospital of Kunshan affiliated with Jiangsu University, Suzhou, Jiangsu, 215300, PR China.
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7
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Zhu G, Qiu W, Li Y, Zhao C, He F, Zhou M, Wang L, Zhao D, Lu Y, Zhang J, Liu Y, Yu T, Wang Y. Sublytic C5b-9 Induces Glomerular Mesangial Cell Apoptosis through the Cascade Pathway of MEKK2-p38 MAPK-IRF-1-TRADD-Caspase 8 in Rat Thy-1 Nephritis. THE JOURNAL OF IMMUNOLOGY 2016; 198:1104-1118. [PMID: 28039298 DOI: 10.4049/jimmunol.1600403] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 11/29/2016] [Indexed: 12/11/2022]
Abstract
The apoptosis of glomerular mesangial cells (GMCs) in the early phase of rat Thy-1 nephritis (Thy-1N), a model of human mesangioproliferative glomerulonephritis (MsPGN), is primarily triggered by sublytic C5b-9. However, the mechanism of GMC apoptosis induced by sublytic C5b-9 remains unclear. In this study, we demonstrate that expressions of TNFR1-associated death domain-containing protein (TRADD) and IFN regulatory factor-1 (IRF-1) were simultaneously upregulated in the renal tissue of Thy-1N rats (in vivo) and in GMCs under sublytic C5b-9 stimulation (in vitro). In vitro, TRADD was confirmed to be a downstream gene of IRF-1, because IRF-1 could bind to TRADD gene promoter to promote its transcription, leading to caspase 8 activation and GMC apoptosis. Increased phosphorylation of p38 MAPK was verified to contribute to IRF-1 and TRADD production and caspase 8 activation, as well as to GMC apoptosis induced by sublytic C5b-9. Furthermore, phosphorylation of MEK kinase 2 (MEKK2) mediated p38 MAPK activation. More importantly, three sites (Ser153/164/239) of MEKK2 phosphorylation were identified and demonstrated to be necessary for p38 MAPK activation. In addition, silencing of renal MEKK2, IRF-1, and TRADD genes or inhibition of p38 MAPK activation in vivo had obvious inhibitory effects on GMC apoptosis, secondary proliferation, and urinary protein secretion in rats with Thy-1N. Collectively, these findings indicate that the cascade axis of MEKK2-p38 MAPK-IRF-1-TRADD-caspase 8 may play an important role in GMC apoptosis following exposure to sublytic C5b-9 in rat Thy-1N.
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Affiliation(s)
- Ganqian Zhu
- Department of Immunology, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China
| | - Wen Qiu
- Department of Immunology, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China
| | - Yongting Li
- Department of Immunology, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China
| | - Chenhui Zhao
- Department of Medicine, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China; and
| | - Fengxia He
- Department of Immunology, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China
| | - Mengya Zhou
- Department of Immunology, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China
| | - Lulu Wang
- Department of Immunology, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China
| | - Dan Zhao
- Department of Immunology, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China
| | - Yanlai Lu
- Department of Immunology, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China
| | - Jing Zhang
- Department of Immunology, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China
| | - Yu Liu
- Department of Immunology, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China
| | - Tianyi Yu
- Department of Immunology, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China
| | - Yingwei Wang
- Department of Immunology, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China; .,Key Laboratory of Human Functional Genomics of Jiangsu Province, Nanjing Medical University, Nanjing 210029, Jiangsu, People's Republic of China
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8
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Ji M, Lu Y, Zhao C, Gao W, He F, Zhang J, Zhao D, Qiu W, Wang Y. C5a Induces the Synthesis of IL-6 and TNF-α in Rat Glomerular Mesangial Cells through MAPK Signaling Pathways. PLoS One 2016; 11:e0161867. [PMID: 27583546 PMCID: PMC5008626 DOI: 10.1371/journal.pone.0161867] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 08/13/2016] [Indexed: 12/16/2022] Open
Abstract
Inflammatory response has been reported to contribute to the renal lesions in rat Thy-1 nephritis (Thy-1N) as an animal model of human mesangioproliferative glomerulonephritis (MsPGN). Besides C5b-9 complex, C5a is also a potent pro-inflammatory mediator and correlated to severity of various nephritic diseases. However, the role of C5a in mediating pro-inflammatory cytokine production in rats with Thy-1N is poorly defined. In the present studies, the levels of C5a, interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) were first determined in the renal tissues of rats with Thy-1N. Then, the expression of IL-6 and TNF-α was detected in rat glomerular mesangial cells (GMC) stimulated with our recombinant rat C5a in vitro. Subsequently, the activation of mitogen-activated protein kinase (MAPK) signaling pathways (p38 MAPK, ERK1/2 and JNK) and their roles in the regulation of IL-6 and TNF-α production were examined in the GMC induced by C5a. The results showed that the levels of C5a, IL-6 and TNF-α were markedly increased in the renal tissues of Thy-1N rats. Rat C5a stimulation in vitro could up-regulate the expression of IL-6 and TNF-α in rat GMC, and the activation of MAPK signaling pathways was involved in the induction of IL-6 and TNF-α. Mechanically, p38 MAPK activation promoted IL-6 production, while either ERK1/2 or JNK activation promoted TNF-α production in the GMC with exposure to C5a. Taken together, these data implicate that C5a induces the synthesis of IL-6 and TNF-α in rat GMC through the activation of MAPK signaling pathways.
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Affiliation(s)
- Mingde Ji
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, P.R. China
- Department of Laboratory Medicine, Affiliated Hospital of Nanjing University of Traditional Chinese Medicine, Nanjing, Jiangsu, 210029, P.R. China
| | - Yanlai Lu
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, P.R. China
| | - Chenhui Zhao
- Department of Medicine, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, P.R. China
| | - Wenxing Gao
- Basic Medical Science of Basic Medical College, Nanjing Medical University, Nanjing, Jiangsu, 211166, P.R. China
| | - Fengxia He
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, P.R. China
| | - Jing Zhang
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, P.R. China
| | - Dan Zhao
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, P.R. China
| | - Wen Qiu
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, P.R. China
- * E-mail:
| | - Yingwei Wang
- Department of Immunology, Nanjing Medical University, Nanjing, Jiangsu, 211166, P.R. China
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9
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He F, Zhou M, Yu T, Zhao D, Zhang J, Qiu W, Lu Y, Liu Y, Wang L, Wang Y. Sublytic C5b-9 triggers glomerular mesangial cell apoptosis in rat Thy-1 nephritis via Gadd45 activation mediated by Egr-1 and p300-dependent ATF3 acetylation. J Mol Cell Biol 2016; 8:477-491. [DOI: 10.1093/jmcb/mjw021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 12/23/2015] [Accepted: 12/25/2015] [Indexed: 11/14/2022] Open
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10
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Huang Q, Wen S, Wang B, Wang Q, Guo C, Wu X, Zhang R, Yang R, Chen F, Xiao W. C5b-9-targeted molecular MR imaging in rats with Heymann nephritis: a new approach in the evaluation of nephrotic syndrome. PLoS One 2015; 10:e0121244. [PMID: 25774523 PMCID: PMC4361404 DOI: 10.1371/journal.pone.0121244] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 02/13/2015] [Indexed: 12/11/2022] Open
Abstract
Membranous nephropathy (MN) is the major cause of adult nephrotic syndrome, which severely affects patients’ quality of life. Currently, percutaneous renal biopsy is required to definitively diagnose MN. However, this technique is invasive and may cause severe complications. Therefore, an urgent clinical need exists for dynamic noninvasive monitoring of the renal state. In-depth molecular imaging studies could assist in finding a solution. Membrane attack complex C5b-9 is the key factor in the development of MN, and this protein primarily deposits in the glomerulus. The present study bound polyclonal antibodies to C5b-9 with ultrasmall superparamagnetic iron oxide (USPIO) nanoparticles to obtain C5b-9-targeted magnetic resonance molecular imaging probes. The probes were injected intravenously into rats with Heymann nephritis, a classic disease model of MN. The signal intensity in the T2*-weighted imaging of kidneys in vivo using 7.0 Tesla magnetic resonance imaging decreased significantly 24 hours after injection compared to the untargeted and control groups. This signal change was consistent with the finding of nanoparticle deposits in pathological glomeruli. This study demonstrated a novel molecular imaging technique for the assessment of MN.
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Affiliation(s)
- Qiang Huang
- Department of Radiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Song Wen
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Medical School, Southeast University, Nanjing, China
| | - Bo Wang
- Department of Pathology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Qidong Wang
- Department of Radiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Chuangen Guo
- Department of Radiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xinying Wu
- Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Rui Zhang
- Department of Radiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Rong Yang
- Department of Radiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Feng Chen
- Department of Radiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- * E-mail: (FC); (WX)
| | - Wenbo Xiao
- Department of Radiology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- * E-mail: (FC); (WX)
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11
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Qiu W, Zhou J, Zhu G, Zhao D, He F, Zhang J, Lu Y, Yu T, Liu L, Wang Y. Sublytic C5b-9 triggers glomerular mesangial cell apoptosis via XAF1 gene activation mediated by p300-dependent IRF-1 acetylation. Cell Death Dis 2014; 5:e1176. [PMID: 24743731 PMCID: PMC4001307 DOI: 10.1038/cddis.2014.153] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 03/06/2014] [Accepted: 03/10/2014] [Indexed: 11/10/2022]
Abstract
The apoptosis of glomerular mesangial cells (GMCs) in rat Thy-1 nephritis (Thy-1N), a model of human mesangioproliferative glomerulonephritis (MsPGN), is accompanied by sublytic C5b-9 deposition. However, the mechanism by which sublytic C5b-9 induces GMC apoptosis is unclear. In the present studies, the effect of X-linked inhibitor of apoptosis-associated factor 1 (XAF1) expression on GMC apoptosis and the role of p300 and interferon regulatory factor-1 (IRF-1) in mediating XAF1 gene activation were determined, both in the GMCs induced by sublytic C5b-9 (in vitro) and in the renal tissues of rats with Thy-1N (in vivo). The in vitro studies demonstrated that IRF-1-enhanced XAF1 gene activation and its regulation by p300-mediated IRF-1 acetylation were involved in GMC apoptosis induced by sublytic C5b-9. The element of IRF-1 binding to XAF1 promoter and two acetylated sites of IRF-1 protein were also revealed. In vivo, silence of p300, IRF-1 or XAF1 genes in the renal tissues diminished GMC apoptosis and secondary GMC proliferation as well as urinary protein secretion in Thy-1N rats. Together, these data implicate that sublytic C5b-9 induces the expression of both p300 and IRF-1, as well as p300-dependent IRF-1 acetylation that may contribute to XAF1 gene activation and subsequent GMC apoptosis in Thy-1N rats.
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Affiliation(s)
- W Qiu
- Department of Microbiology and Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - J Zhou
- Department of Microbiology and Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - G Zhu
- Department of Microbiology and Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - D Zhao
- Department of Microbiology and Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - F He
- Department of Microbiology and Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - J Zhang
- Department of Microbiology and Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Y Lu
- Department of Microbiology and Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - T Yu
- Department of Microbiology and Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - L Liu
- Department of Microbiology and Immunology, Nanjing Medical University, Nanjing, People's Republic of China
| | - Y Wang
- Department of Microbiology and Immunology, Nanjing Medical University, Nanjing, People's Republic of China
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12
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Cocaine-associated retiform purpura: a C5b-9-mediated microangiopathy syndrome associated with enhanced apoptosis and high levels of intercellular adhesion molecule-1 expression. Am J Dermatopathol 2014; 35:722-30. [PMID: 23392134 DOI: 10.1097/dad.0b013e31827eaf0b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cocaine-associated retiform purpura is a recently described entity characterized by striking hemorrhagic necrosis involving areas of skin associated with administration of cocaine. Levamisole, an adulterant in cocaine, has been suggested as the main culprit pathogenetically. Four cases of cocaine-associated retiform purpura were encountered in the dermatopathology practice of C. M. Magro. The light microscopic findings were correlated with immunohistochemical and immunofluorescence studies. All 4 cases showed a very striking thrombotic diathesis associated with intravascular macrophage accumulation. Necrotizing vasculitis was noted in 1 case. Striking intercellular adhesion molecule-1 (ICAM-1)/CD54 expression in vessel wall along with endothelial expression of caspase 3 and extensive vascular C5b-9 deposition was observed in all biopsies examined. Cocaine-induced retiform purpura is a C5b-9-mediated microvascular injury associated with enhanced apoptosis and prominent vascular expression of ICAM-1, all of which have been shown in prior in vitro and in vivo murine models to be a direct effect of cocaine metabolic products. Antineutrophilic cytoplasmic antibody and antiphospholipid antibodies are likely the direct sequelae of the proapoptotic microenvironment. The inflammatory vasculitic lesion could reflect the downstream end point reflective of enhanced ICAM-1 expression and the development of antineutrophilic cytoplasmic antibody. Levamisole likely works synergistically with cocaine in the propagation of this syndromic complex.
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13
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Zhang J, Li Y, Shan K, Wang L, Qiu W, Lu Y, Zhao D, Zhu G, He F, Wang Y. Sublytic C5b-9 induces IL-6 and TGF-β1 production by glomerular mesangial cells in rat Thy-1 nephritis through p300-mediated C/EBPβ acetylation. FASEB J 2013; 28:1511-25. [PMID: 24344329 DOI: 10.1096/fj.13-242693] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
CCAAT/enhancer-binding protein (C/EBPβ)-enhanced IL-6 and TGF-β1 promoter activity and p300-mediated C/EBPβ acetylation were involved in up-regulation of IL-6 and TGF-β1 expression in GMCs attacked by sublytic C5b-9. In detail, the elements of C/EBPβ binding to rat IL-6 and TGF-β1 promoter and 3 acetylated sites of rat C/EBPβ protein were first revealed. Furthermore, silencing the p300 or C/EBPβ gene in rat kidney significantly reduced the production of IL-6 and TGF-β1 and renal lesions in Thy-1N rats. Together, these data indicate that the mechanism of IL-6 and TGF-β1 production in renal tissue of Thy-1N rats is associated with sublytic C5b-9 up-regulated p300 and p300-mediated C/EBPβ acetylation as well as C/EBPβ-activated IL-6 and TGF-β1 genes.
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Affiliation(s)
- Jing Zhang
- 1Department of Microbiology and Immunology, Nanjing Medical University, Hanzhong Rd. 140, Nanjing, Jiangsu 210029, China.
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14
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Zhang J, Zha W, Wang F, Jiang T, Xu S, Yu J, Zhou C, Shen T, Wu C, Zhu Q. Complement Activation and Liver Impairment in Trichloroethylene-Sensitized BALB/c Mice. Int J Toxicol 2013; 32:431-41. [DOI: 10.1177/1091581813511337] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Our recent studies have shown that trichloroethylene (TCE) was able to induce multisystem injuries in the form of occupational medicamentosa-like dermatitis, including skin, kidney, and liver damages. However, the role of complement activation in the immune-mediated liver injury is not known. This study examined the role of complement activation in the liver injury in a mouse model of TCE-induced sensitization. Treatment of female BALB/c mice with TCE under specific dosing protocols resulted in skin inflammation and sensitization. Skin edema and erythema occurred in TCE-sensitized groups. Trichloroethylene sensitization produced liver histopathological lesions, increased serum alanine aminotransferase, aspartate transaminase activities, and the relative liver weight. The concentrations of serum complement components C3a-desArg, C5a-desArg, and C5b-9 were significantly increased in 24-hour, 48-hour, and 72-hour sensitization-positive groups treated with TCE and peaked in the 72-hour sensitization-positive group. Depositions of C3a, C5a, and C5b-9 into the liver tissue were also revealed by immunohistochemistry. Immunofluorescence further verified high C5b-9 expression in 24-hour, 48-hour, and 72-hour sensitization-positive groups in response to TCE treatment. Reverse transcription–polymerase chain reaction detected C3 messenger RNA expression in the liver, and this was significantly increased in 24-hour and 48-hour sensitization-positive groups with a transient reduction at 72 hours. These results provide the first experimental evidence that complement activation may play a key role in the generation and progression of immune-mediated hepatic injury by exposure to TCE.
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Affiliation(s)
- Jiaxiang Zhang
- Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, Anhui, People’s Republic of China
| | - Wansheng Zha
- Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, Anhui, People’s Republic of China
| | - Feng Wang
- Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, Anhui, People’s Republic of China
| | - Tao Jiang
- Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, Anhui, People’s Republic of China
| | - Shuhai Xu
- Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, Anhui, People’s Republic of China
| | - Junfeng Yu
- Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, Anhui, People’s Republic of China
- Institute of Dermatology, Anhui Medical University, Hefei, Anhui, People’s Republic of China
| | - Chengfan Zhou
- Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, Anhui, People’s Republic of China
- Institute of Dermatology, Anhui Medical University, Hefei, Anhui, People’s Republic of China
| | - Tong Shen
- Institute of Dermatology, Anhui Medical University, Hefei, Anhui, People’s Republic of China
| | - Changhao Wu
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Qixing Zhu
- Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, Anhui, People’s Republic of China
- Institute of Dermatology, Anhui Medical University, Hefei, Anhui, People’s Republic of China
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15
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Leslie JD, Mayor R. Complement in animal development: unexpected roles of a highly conserved pathway. Semin Immunol 2013; 25:39-46. [PMID: 23665279 PMCID: PMC3989114 DOI: 10.1016/j.smim.2013.04.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 04/13/2013] [Indexed: 12/16/2022]
Abstract
The complement pathway is most famous for its role in immunity, orchestrating an exquisitely refined system for immune surveillance. At its core lies a cascade of proteolytic events that ultimately serve to recognise microbes, infected cells or debris and target them for elimination. Mounting evidence has shown that a number of the proteolytic intermediaries in this cascade have, in themselves, other functions in the body, signalling through receptors to drive events that appear to be unrelated to immune surveillance. It seems, then, that the complement system not only functions as an immunological effector, but also has cell-cell signalling properties that are utilised by a number of non-immunological processes. In this review we examine a number of these processes in the context of animal development, all of which share a requirement for precise control of cell behaviour in time and space. As we will see, the scope of the complement system's function is indeed much greater than we might have imagined only a few years ago.
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Affiliation(s)
- Jonathan D Leslie
- Department of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, United Kingdom
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16
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Qiu W, Li Y, Zhou J, Zhao C, Zhang J, Shan K, Zhao D, Wang Y. TSP-1 promotes glomerular mesangial cell proliferation and extracellular matrix secretion in Thy-1 nephritis rats. J Biomed Res 2013; 25:402-10. [PMID: 23554717 PMCID: PMC3596719 DOI: 10.1016/s1674-8301(11)60053-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 08/28/2011] [Accepted: 10/05/2011] [Indexed: 11/16/2022] Open
Abstract
The proliferation of glomerular mesangial cells (GMC) and secretion of the extracellular matrix (ECM) in rat with Thy-1 nephritis (Thy-1N) resembling human mesangioproliferative glomerulonephritis have been explored for many years; however, the molecular mechanisms of GMC proliferation and ECM production remain unclear. Our previous studies have demonstrated that the thrombospondin-1 (TSP-1) gene was involved in mediating rat GMC proliferation and ECM synthesis induced by sublytic C5b-9 in vitro. In the present study, the roles of the TSP-1 gene in GMC proliferation, ECM production, and urinary protein secretion in Thy-1N rats were determined by using TSP-1 small hairpin RNA, and the results revealed that silencing of the TSP-1 gene in rat renal tissues could diminish GMC proliferation (P < 0.01) and ECM secretion (P < 0.01) as well as urinary protein secretion (P < 0.05) in Thy-1N rats. Together, the current findings suggested that TSP-1 gene expression was required for GMC proliferation and ECM production in Thy-1N rats.
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Affiliation(s)
- Wen Qiu
- Department of Microbiology and Immunology, Nanjing Medical University, Nanjing, Jiangsu 210029, China
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17
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Liu L, Qiu W, Wang H, Li Y, Zhou J, Xia M, Shan K, Pang R, Zhou Y, Zhao D, Wang Y. Sublytic C5b-9 complexes induce apoptosis of glomerular mesangial cells in rats with Thy-1 nephritis through role of interferon regulatory factor-1-dependent caspase 8 activation. J Biol Chem 2012; 287:16410-23. [PMID: 22427665 DOI: 10.1074/jbc.m111.319566] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The apoptosis of glomerular mesangial cells (GMC) in rat Thy-1 nephritis (Thy-1N), a model of human mesangioproliferative glomerulonephritis, is accompanied by sublytic C5b-9 deposition, but the mechanism of sublytic C5b-9-mediated GMC apoptosis has not been elucidated. In the present study, the gene expression profiles both in the GMC stimulated by sublytic C5b-9 and the rat renal tissue of Thy-1N were detected using microarrays. Among the co-up-regulated genes, the up-regulation of interferon regulatory factor-1 (IRF-1) was further confirmed. Increased caspase 8 and caspase 3 expression and caspase 8 promoter activity in the GMC were also identified. Meanwhile, overexpression or knockdown of IRF-1 not only enhanced or inhibited GMC apoptosis and caspase 8 and 3 induction but also increased or decreased caspase 8 promoter activity, respectively. The element of IRF-1 binding to the caspase 8 promoter was first revealed. Furthermore, silencing IRF-1 or repressing the activation of caspases 8 and 3 significantly reduced GMC apoptosis, including other pathologic changes of Thy-1N. These novel findings indicate that GMC apoptosis of Thy-1N is associated with the IRF-1-activated caspase 8 pathway.
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Affiliation(s)
- Lisha Liu
- Department of Microbiology and Immunology, Nanjing Medical University, Nanjing 210029, China
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18
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Qiu W, Zhang Y, Liu X, Zhou J, Li Y, Zhou Y, Shan K, Xia M, Che N, Feng X, Zhao D, Wang Y. Sublytic C5b-9 complexes induce proliferative changes of glomerular mesangial cells in rat Thy-1 nephritis through TRAF6-mediated PI3K-dependent Akt1 activation. J Pathol 2011; 226:619-32. [PMID: 21984198 DOI: 10.1002/path.3011] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Revised: 07/21/2011] [Accepted: 08/12/2011] [Indexed: 12/20/2022]
Abstract
The proliferation of glomerular mesangial cells (GMCs) and secretion of extracellular matrix (ECM) in rat Thy-1 nephritis (Thy-1N), resembling human mesangioproliferative glomerulonephritis (MsPGN), have been studied for many years, but the mechanisms, especially the role of signalling pathway activation and its regulation in GMCs triggered by sublytic C5b-9 complexes in Thy-1N rats remain largely unclear. In the study, the proliferation of GMCs and production of ECM as well as the role of PI3K/Akt and its regulation, both in GMCs induced by sublytic C5b-9 (in vitro) and in the renal tissues of rats with Thy-1N (in vivo), were determined and the results revealed that GMCs proliferation and ECM secretion, both in vitro and in vivo, were notably increased, and that PI3K/Akt1 activation and its regulation, such as TNF receptor-associated factor 6 (TRAF6)-mediated Akt1 ubiquitination and PI3K-dependent Akt1 phosphorylation, were involved in the process of Thy-1N induction. On the other hand, silence of the TRAF6, PI3K or Akt1 genes could obviously diminish the proliferative damages and urinary protein secretion of Thy-1N rats. Together, these data implicated that sublytic C5b-9 complexes in Thy-1N rats could promote GMCs proliferation and ECM production through TRAF6-mediated PI3K-dependent Akt1 activation, in which the ubiquitination and phosphorylation of the Akt1 signal molecule played an important role in the initiation and development of the proliferative changes in the rats with Thy-1N.
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Affiliation(s)
- Wen Qiu
- Department of Immunology and Lab of Immunopathology, Nanjing Medical University, People's Republic of China
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Xu K, Zhou Y, Qiu W, Liu X, Xia M, Liu L, Liu X, Zhao D, Wang Y. Activating transcription factor 3 (ATF3) promotes sublytic C5b-9-induced glomerular mesangial cells apoptosis through up-regulation of Gadd45α and KLF6 gene expression. Immunobiology 2011; 216:871-81. [DOI: 10.1016/j.imbio.2011.02.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Revised: 01/13/2011] [Accepted: 02/15/2011] [Indexed: 01/08/2023]
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Role of activating transcription factor 3 (ATF3) in sublytic C5b-9-induced glomerular mesangial cell apoptosis. Cell Mol Immunol 2010; 7:143-51. [PMID: 20140008 DOI: 10.1038/cmi.2009.109] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Sublytic complement C5b-9 complexes can cause cell apoptosis, but the mechanism of glomerular mesangial cell (GMC) apoptosis mediated by these complexes has not been well defined. The activating transcription factor 3 (ATF3) gene is an immediate early gene for the cell to cope with a variety of stress signals and can promote apoptosis of some cells. In this study, ATF3 expression and cell apoptosis in GMCs induced by sublytic C5b-9 were measured, and then the effects of ATF3 gene over-expression or knockdown on GMC apoptosis induced by sublytic C5b-9 were examined at a fixed time. The results showed that both ATF3 expression and GMC apoptosis were markedly increased and ATF3 over-expression obviously increased sublytic C5b-9-induced GMC apoptosis, whereas ATF3 gene silencing had a significant opposite effect. Collectively, these findings indicate that upregulation of ATF3 gene expression is involved in regulating GMC apoptosis induced by sublytic C5b-9 complexes.
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