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Xu Y, Zhang H, Chen Y, Pober JS, Zhou M, Zhou JH, Min W. SRF SUMOylation modulates smooth muscle phenotypic switch and vascular remodeling. Nat Commun 2024; 15:6919. [PMID: 39134547 PMCID: PMC11319592 DOI: 10.1038/s41467-024-51350-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 08/05/2024] [Indexed: 08/15/2024] Open
Abstract
Serum response factor (SRF) controls gene transcription in vascular smooth muscle cells (VSMCs) and regulates VSMC phenotypic switch from a contractile to a synthetic state, which plays a key role in the pathogenesis of cardiovascular diseases (CVD). It is not known how post-translational SUMOylation regulates the SRF activity in CVD. Here we show that Senp1 deficiency in VSMCs increased SUMOylated SRF and the SRF-ELK complex, leading to augmented vascular remodeling and neointimal formation in mice. Mechanistically, SENP1 deficiency in VSMCs increases SRF SUMOylation at lysine 143, reducing SRF lysosomal localization concomitant with increased nuclear accumulation and switching a contractile phenotype-responsive SRF-myocardin complex to a synthetic phenotype-responsive SRF-ELK1 complex. SUMOylated SRF and phospho-ELK1 are increased in VSMCs from coronary arteries of CVD patients. Importantly, ELK inhibitor AZD6244 prevents the shift from SRF-myocardin to SRF-ELK complex, attenuating VSMC synthetic phenotypes and neointimal formation in Senp1-deficient mice. Therefore, targeting the SRF complex may have a therapeutic potential for the treatment of CVD.
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Affiliation(s)
- Yue Xu
- Interdepartmental Program in Vascular Biology and Therapeutics, Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
- State Key Laboratory of Ophthalmology and Guangdong Province Key Laboratory of Ophthalmology and Visual Science, Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Haifeng Zhang
- Interdepartmental Program in Vascular Biology and Therapeutics, Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Yuxin Chen
- Cardiovascular Medical Center, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Jordan S Pober
- Interdepartmental Program in Vascular Biology and Therapeutics, Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Min Zhou
- Cardiovascular Medical Center, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China.
| | - Jenny Huanjiao Zhou
- Interdepartmental Program in Vascular Biology and Therapeutics, Department of Pathology, Yale University School of Medicine, New Haven, CT, USA.
| | - Wang Min
- Cardiovascular Medical Center, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China.
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Qin Y, Shao B, Ren SH, Ye K, Qin H, Wang HD, Sun C, Zhu Y, Wang Z, Zhang J, Li X, Wang H. Interleukin-37 contributes to endometrial regenerative cell-mediated immunotherapeutic effect on chronic allograft vasculopathy. Cytotherapy 2024; 26:299-310. [PMID: 38159090 DOI: 10.1016/j.jcyt.2023.12.004] [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: 05/19/2023] [Revised: 11/26/2023] [Accepted: 12/12/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND AIMS Chronic allograft vasculopathy (CAV) remains a predominant contributor to late allograft failure after organ transplantation. Several factors have already been shown to facilitate the progression of CAV, and there is still an urgent need for effective and specific therapeutic approaches to inhibit CAV. Human mesenchymal-like endometrial regenerative cells (ERCs) are free from the deficiencies of traditional invasive acquisition methods and possess many advantages. Nevertheless, the exact immunomodulation mechanism of ERCs remains to be elucidated. METHODS C57BL/6 (B6) mouse recipients receiving BALB/c mouse donor abdominal aorta transplantation were treated with ERCs, negative control (NC)-ERCs and interleukin (IL)-37-/-ERCs (ERCs with IL-37 ablation), respectively. Pathologic lesions and inflammatory cell infiltration in the grafts, splenic immune cell populations, circulating donor-specific antibody levels and cytokine profiles were analyzed on postoperative day (POD) 40. The proliferative capacities of Th1, Th17 and Treg subpopulations were assessed in vitro. RESULTS Allografts from untreated recipients developed typical pathology features of CAV, namely endothelial thickening, on POD 40. Compared with untreated and IL-37-/-ERC-treated groups, IL-37-secreting ERCs (ERCs and NC-ERCs) significantly reduced vascular stenosis, the intimal hyperplasia and collagen deposition. IL-37-secreting ERCs significantly inhibited the proliferation of CD4+T cells, reduced the proportions of Th1 and Th17 cells, but increased the proportion of Tregs in vitro. Furthermore, in vitro results also showed that IL-37-secreting ERCs significantly inhibited Th1 and Th17 cell responses, abolished B-cell activation, diminished donor-specific antibody production and increased Treg proportions. Notably, IL-37-secreting ERCs remarkably downregulated the levels of pro-inflammatory cytokines (interferon-γ, tumor necrosis factor-α, IL-1β, IL-6 and IL-17A) and increased IL-10 levels in transplant recipients. CONCLUSIONS The knockdown of IL-37 dramatically abrogates the therapeutic ability of ERCs for CAV. Thus, this study highlights that IL-37 is indispensable for ERC-mediated immunomodulation for CAV and improves the long-term allograft acceptance.
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Affiliation(s)
- Yafei Qin
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, PR China; Department of Vascular Surgery, Zhengzhou University People's Hospital, Henan Provincial People's Hospital, Zhengzhou, PR China.
| | - Bo Shao
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, PR China; Tianjin General Surgery Institute, Tianjin Medical University General Hospital, Tianjin, PR China.
| | - Shao-Hua Ren
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, PR China; Tianjin General Surgery Institute, Tianjin Medical University General Hospital, Tianjin, PR China.
| | - Kui Ye
- Department of Vascular Surgery, Tianjin Fourth Central Hospital, The Fourth Central Clinical College, Tianjin Medical University, Tianjin, PR China.
| | - Hong Qin
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, PR China; Tianjin General Surgery Institute, Tianjin Medical University General Hospital, Tianjin, PR China.
| | - Hong-da Wang
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, PR China; Tianjin General Surgery Institute, Tianjin Medical University General Hospital, Tianjin, PR China.
| | - Chenglu Sun
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, PR China; Tianjin General Surgery Institute, Tianjin Medical University General Hospital, Tianjin, PR China.
| | - Yanglin Zhu
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, PR China; Tianjin General Surgery Institute, Tianjin Medical University General Hospital, Tianjin, PR China.
| | - Zhaobo Wang
- School of Basic Medical Sciences, Tianjin Medical University, Tianjin, PR China.
| | - Jingyi Zhang
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, PR China; Tianjin General Surgery Institute, Tianjin Medical University General Hospital, Tianjin, PR China.
| | - Xiang Li
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, PR China; Tianjin General Surgery Institute, Tianjin Medical University General Hospital, Tianjin, PR China.
| | - Hao Wang
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, PR China; Tianjin General Surgery Institute, Tianjin Medical University General Hospital, Tianjin, PR China.
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Song Z, Chen C, He J, Liu B, Ji W, Wu L, He L. ASK1-Interacting Protein 1 Acts as a Novel Predictor of Type 2 Diabetes. Front Endocrinol (Lausanne) 2022; 13:896753. [PMID: 35712257 PMCID: PMC9196954 DOI: 10.3389/fendo.2022.896753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 04/25/2022] [Indexed: 11/13/2022] Open
Abstract
Type 2 diabetes (T2D) mellitus is a chronic inflammatory disease characterized with high secretion of tumor necrosis factor (TNF)-α, but the regulatory pathway of TNF-α production in T2D has not been fully elucidated. ASK1-interacting protein 1 (AIP1) is a signaling scaffold protein that modulates several pathways associated with inflammation. In this study, we aimed to investigate the role of AIP1 in T2D development. Our results revealed that AIP1 was downregulated in omental adipose tissue (OAT) of obese patients with T2D compared with that in obese patients. In addition, Pearson's correlation test showed that AIP1 was negatively correlated with the homeostatic model assessment for insulin resistance (HOMA-IR, r = -0.4829) and waist-to-hip ratio (r = -0.2614), which are major clinical indexes of T2D. As revealed by the proteomic analysis, immunohistochemistry, and ELISA, the OAT and the serum of obese patients with T2D presented high inflammatory status. And the increased inflammatory factors TNF-α and C-reactive protein C (CRP) in the serum of obese patients with T2D showed a positive correlation with HOMA-IR (TNF-α, r = 0.4728; CRP, r = 0.5522). Interestingly, AIP1 deficiency in adipocytes facilitated TNF-α secretion and retarded glucose uptake. Mechanistically, AIP1 deletion in human adipocytes activated JNK, p38 MAPK, and ERK1/2 signaling. Furthermore, inhibition of these signaling pathways using specific inhibitors could suppress these signal activation and insulin resistance caused by AIP1 deficiency. In addition, AIP1 and TNF-α expression in the OAT of patients with T2D recovered to normal levels after laparoscopic Roux-en-Y gastric bypass (RYGB) surgery. These findings indicate that AIP1 is negatively correlated with the clinical indexes of T2D. It modulates TNF-α expression in OAT via JNK, p38 MAPK, and ERK1/2 signaling.
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Affiliation(s)
- Zhigao Song
- Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Department of Cardiovascular Surgery, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Cong Chen
- Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jipei He
- Department of Metabolic Surgery, Your Doctor Medical Group, Guangzhou, China
| | - Bixia Liu
- Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Weidong Ji
- Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- *Correspondence: Li He, ; Liangping Wu, ; Weidong Ji,
| | - Liangping Wu
- Department of Metabolic Surgery, Your Doctor Medical Group, Guangzhou, China
- Department of Metabolic Surgery, Jinshazhou Hospital of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
- *Correspondence: Li He, ; Liangping Wu, ; Weidong Ji,
| | - Li He
- Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
- *Correspondence: Li He, ; Liangping Wu, ; Weidong Ji,
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4
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Li Z, Li L, Zhang H, Zhou HJ, Ji W, Min W. Short AIP1 (ASK1-Interacting Protein-1) Isoform Localizes to the Mitochondria and Promotes Vascular Dysfunction. Arterioscler Thromb Vasc Biol 2020; 40:112-127. [PMID: 31619063 PMCID: PMC7204498 DOI: 10.1161/atvbaha.119.312976] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Vascular endothelial cells (ECs) normally maintain vascular homeostasis and are regulated by proinflammatory cytokines and reactive oxygen species. A human genome-wide association study identified that AIP1 (ASK1 [apoptosis signal-regulating kinase 1]-interacting protein-1; also identified as DAB2IP) gene variants confer susceptibility to cardiovascular disease, but the underlying mechanism is unknown. Approach and Results: We detected a normal AIP1 form (named AIP1A) in the healthy aorta, but a shorter form of AIP1 (named AIP1B) was found in diseased aortae that contained atherosclerotic plaques and graft arteriosclerosis. AIP1B transcription in resting ECs was suppressed through epigenetic inhibition by RIF1 (Rap1 [ras-related protein 1]-interacting factor 1)/H3K9 (histone H3 lysine 9) methyltransferase-mediated H3K9 trimethylation, and this inhibition was released by proinflammatory cytokines. AIP1A, but not AIP1B, was downregulated by proteolytic degradation through a Smurf1 (SMAD [suppressor of mothers against decapentaplegic miscellaneous] ubiquitylation regulatory factor 1)-dependent pathway in ECs under inflammation. Therefore, AIP1B was the major form present during inflammatory conditions. AIP1B, which lacks the N-terminal pleckstrin homology domain of AIP1A, localized to the mitochondria and augmented TNFα (tumor necrosis factor alpha)-induced mitochondrial reactive oxygen species generation and EC activation. AIP1B-ECTG (EC-specific AIP1B transgenic) mice exhibited augmented reactive oxygen species production, EC activation, and neointima formation in vascular remodeling models. CONCLUSIONS Our current study suggests that a shift from anti-inflammatory AIP1A to proinflammatory AIP1B during chronic inflammation plays a key role in inflammatory vascular diseases.
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MESH Headings
- Animals
- Aorta, Thoracic/metabolism
- Aorta, Thoracic/pathology
- Apoptosis
- Arteriosclerosis/genetics
- Arteriosclerosis/metabolism
- Arteriosclerosis/pathology
- Blotting, Western
- Cells, Cultured
- DNA/genetics
- Disease Models, Animal
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/pathology
- Gene Expression Regulation
- Genome-Wide Association Study/methods
- Humans
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- Microscopy, Fluorescence
- Mitochondria/metabolism
- Mitochondria/pathology
- Signal Transduction
- ras GTPase-Activating Proteins/biosynthesis
- ras GTPase-Activating Proteins/genetics
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Affiliation(s)
- Zheng Li
- Department of Pathology and the Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06519, U.S.A
| | - Li Li
- Department of Pathology and the Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06519, U.S.A
- Center for Translational Medicine, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, Guangdong, China
| | - Haifeng Zhang
- Department of Pathology and the Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06519, U.S.A
| | - Huanjiao Jenny Zhou
- Department of Pathology and the Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06519, U.S.A
| | - Weidong Ji
- Center for Translational Medicine, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, Guangdong, China
| | - Wang Min
- Department of Pathology and the Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06519, U.S.A
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5
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Qin L, Min W, Xin S. AIP1 Suppresses Transplant Arteriosclerosis Through Inhibition of Vascular Smooth Muscle Cell Inflammatory Response to IFNγ. Anat Rec (Hoboken) 2018; 302:1587-1593. [PMID: 30471213 DOI: 10.1002/ar.24040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 09/19/2018] [Accepted: 09/21/2018] [Indexed: 12/14/2022]
Abstract
IFNγ-induced vascular smooth muscle cells (VSMCs) inflammatory response plays a key role in transplant arteriosclerosis (TA). However, the mechanisms regulating this process remains poorly defined. Here, we show that ASK1-interacting protein 1 (AIP1) deletion markedly augments the expression of IFNγ-induced chemokines in mouse aortic allografts. Subsequently, donor arterial grafts from AIP1 deficient mice exhibited an accelerated development of TA. Furthermore, AIP1 knockdown significantly increased IFNγ signaling activation in cultured VSMCs and thus enhances chemokines production in response to IFNγ. Together, we conclude that AIP1 functions as an inhibitor of VSMCs inflammation by regulating IFNγ signaling and therefore suppresses TA progression. Our findings suggest that AIP1 might be a potential therapeutic target for chronic transplant rejection. Anat Rec, 302:1587-1593, 2019. © 2018 American Association for Anatomy.
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Affiliation(s)
- Lingfeng Qin
- Department of Vascular Surgery, The First Hospital of China Medical University, 155 Nanjing Bei Street, Shenyang, China.,Key Laboratory of Pathogenesis, Prevention and Therapeutics of Aortic Aneurysm, Liaoning Province, China
| | - Wang Min
- Interdepartmental Program in Vascular Biology and Therapeutics, Department of Pathology, Yale University School of Medicine, New Haven, Connecticut
| | - Shijie Xin
- Department of Vascular Surgery, The First Hospital of China Medical University, 155 Nanjing Bei Street, Shenyang, China.,Key Laboratory of Pathogenesis, Prevention and Therapeutics of Aortic Aneurysm, Liaoning Province, China
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6
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Zhang J, Chen C, Li L, Zhou HJ, Li F, Zhang H, Yu L, Chen Y, Min W. Endothelial AIP1 Regulates Vascular Remodeling by Suppressing NADPH Oxidase-2. Front Physiol 2018; 9:396. [PMID: 29731721 PMCID: PMC5921534 DOI: 10.3389/fphys.2018.00396] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 04/04/2018] [Indexed: 12/31/2022] Open
Abstract
Objective: AIP1 expression is downregulated in human atherosclerotic plaques and global deletion of AIP1 in mice exacerbates atherosclerosis in ApoE-KO mouse models. However, the direct role of AIP1 in endothelium, vascular remodeling and associated vascular diseases has not been determined. Approach and Results: We used endothelial cell (EC)-specific AIP1-deficient (AIP1-ECKO) mice to define the role of AIP1 in vascular remodeling and intima-media thickening in a mouse carotid artery ligation model characterized by both neointimal hyperplasia and inward vessel remodeling. Compared to WT littermates, AIP1-ECKO mice had 2.2-fold larger intima area and 4.4-fold thicker intima as measured by intima/media ratio in arteries with more proliferating vascular smooth muscle cells (VSMCs) at week 2-4 post-injury. Increased reactive oxygen species (ROS) in endothelium at early time points induced inflammation and vessel dysfunction in AIP1-ECKO prior to VSMC accumulations. Moreover, knockdown of AIP1 in human EC enhanced ROS generation which was attenuated by co-silencing of NOX2. Mechanistically, AIP1 via its proline-rich region binds to the SH3 domain of cytosolic subunit p47phox to disrupt formation of an active NOX2 complex, attenuating ROS production. Conclusion: Our study supports that AIP1 regulates vascular remodeling with intima-media thickening by suppressing endothelial NOX2-dependent oxidative stress. Highlights: •In a carotid ligation model, endothelial cell (EC)-specific AIP1-deficient (AIP1-ECKO) mice had much larger media area, thicker vessel wall and augmented neointima formation.•Increased production of reactive oxygen species in vascular EC at early time points concomitant with vessel dysfunction in AIP1-ECKO.•AIP1 via its proline-rich region binds to the SH3 domain of cytosolic subunit p47phox to disrupt formation of an active NOX2 complex, attenuating ROS production.
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Affiliation(s)
- Jiqin Zhang
- Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Department of Pathology and The Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, United States
| | - Chaofei Chen
- Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Department of Pathology and The Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, United States
| | - Li Li
- Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Huanjiao J. Zhou
- Department of Pathology and The Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, United States
| | - Fenghe Li
- Department of Pathology and The Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, United States
| | - Haifeng Zhang
- Department of Pathology and The Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, United States
| | - Luyang Yu
- Institute of Genetics, Institute of Genetics and Regenerative Biology, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Yuxin Chen
- Department of Laboratory Medicine, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing, China
| | - Wang Min
- Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Department of Pathology and The Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, United States
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7
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Block one, unleash a hundred. Mechanisms of DAB2IP inactivation in cancer. Cell Death Differ 2016; 24:15-25. [PMID: 27858941 DOI: 10.1038/cdd.2016.134] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/26/2016] [Accepted: 10/12/2016] [Indexed: 02/07/2023] Open
Abstract
One of the most defining features of cancer is aberrant cell communication; therefore, a molecular understanding of the intricate network established among tumor cells and their microenvironment could significantly improve comprehension and clinical management of cancer. The tumor suppressor DAB2IP (Disabled homolog 2 interacting protein), also known as AIP1 (ASK1 interacting protein), has an important role in this context, as it modulates signal transduction by multiple inflammatory cytokines and growth factors. DAB2IP is a Ras-GAP, and negatively controls Ras-dependent mitogenic signals. In addition, acting as a signaling adaptor, DAB2IP modulates other key oncogenic pathways, including TNFα/NF-κB, WNT/β-catenin, PI3K/AKT, and androgen receptors. Therefore, DAB2IP inactivation can provide a selective advantage to tumors initiated by a variety of driver mutations. In line with this role, DAB2IP expression is frequently impaired by methylation in cancer. Interestingly, recent studies reveal that tumor cells can employ other sophisticated mechanisms to disable DAB2IP at the post-transcriptional level. We review the mechanisms and consequences of DAB2IP inactivation in cancer, with the purpose to support and improve research aimed to counteract such mechanisms. We suggest that DAB2IP reactivation in cancer cells could be a strategy to coordinately dampen multiple oncogenic pathways, potentially limiting progression of a wide spectrum of tumors.
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8
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Zhang J, Zhou HJ, Ji W, Min W. AIP1-mediated stress signaling in atherosclerosis and arteriosclerosis. Curr Atheroscler Rep 2015; 17:503. [PMID: 25732743 DOI: 10.1007/s11883-015-0503-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
AIP1 (ASK1-interacting protein-1; encoded by the DAB2IP gene), a signaling scaffolding protein, is abundantly expressed in vascular endothelial cells (EC). While it was initially discovered as an apoptosis signal-regulating kinase 1 (ASK1)-interacting protein, AIP1 broadly suppresses inflammatory responses triggered by cytokines and stresses such as TNF, LPS, VEGF, and endoplasmic reticulum (ER) stress in EC (therefore, AIP1 is an anti-inflammatory protein). Human genome-wide association study (GWAS) has identified DAB2IP gene variants conferring susceptibility to cardiovascular diseases. Consistently, a global or vascular EC-specific deletion of DAB2IP in mice strongly enhances inflammatory responses and exacerbates atherosclerosis and graft arteriosclerosis progression in mouse models. Mechanisms for AIP1 function and regulation associated with human cardiovascular diseases need further investigations.
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Affiliation(s)
- Jiqin Zhang
- Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
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9
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Abstract
Small GTPases are key signal transducers from extracellular stimuli to the nucleus that regulate a variety of cellular responses, including changes in gene expression and cell adhesion and migration. Accumulating data have demonstrated that abnormal activation of these small GTPases plays a critical role in the atherosclerosis characterized by vascular abnormalities, especially endothelial dysfunction and inflammation. Here, we discuss the linkage between small GTPases, inflammation, and atherogenesis. First, small GTPases affect gene expression of inflammatory cytokines through proinflammatory signaling pathways, such as nuclear factor-κB, vascular cell adhesion molecule-1, intercellular adhesion molecule-1, interlukin-8, and monocyte chemoattractant protein-1. Then, these molecules regulate the vascular inflammation through cell adhesion and migration. In turn, small GTPases are also regulated by extracellular stimuli, such as L-selectin, thrombin, oxidized phospholipids, and interleukins. Thus, these inflammatory cytokines generate a vicious cycle for small GTPases and inflammatory responses in the atherogenesis.
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10
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Abstract
Vasculitis of the medium and large arteries, most often presenting as giant cell arteritis (GCA), is an infrequent, but potentially fatal, type of immune-mediated vascular disease. The site of the aberrant immune reaction, the mural layers of the artery, is strictly defined by vascular dendritic cells, endothelial cells, vascular smooth muscle cells and fibroblasts, which engage in an interaction with T cells and macrophages to, ultimately, cause luminal stenosis or aneurysmal wall damage of the vessel. A multitude of effector cytokines, all known as critical mediators in host-protective immunity, have been identified in vasculitic lesions. Two dominant cytokine clusters--the IL-6-IL-17 axis and the IL-12-IFN-γ axis--have been linked to disease activity. These two clusters seem to serve different roles in the vasculitic process. The IL-6-IL-17 cluster is highly responsive to standard corticosteroid therapy, whereas the IL-12-IFN-γ cluster is resistant to steroid-mediated immunosuppression. The information exchange between vascular and immune cells and stabilization of the vasculitic process involves members of the Notch receptor and ligand family. Focusing on elements in the tissue context of GCA, instead of broadly suppressing host immunity, might enable a more tailored therapeutic approach that avoids unwanted adverse effects of aggressive immunosuppression.
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Affiliation(s)
- Cornelia M Weyand
- Department of Medicine, Division of Immunology and Rheumatology, Stanford University School of Medicine, CCSR Building Room 2225, Mail Code 5166, 269 Campus Drive West, Stanford, CA 94305-5166, USA
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11
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Qin L, Huang Q, Zhang H, Liu R, Tellides G, Min W, Yu L. SOCS1 prevents graft arteriosclerosis by preserving endothelial cell function. J Am Coll Cardiol 2013; 63:21-9. [PMID: 23994402 DOI: 10.1016/j.jacc.2013.08.694] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 08/05/2013] [Accepted: 08/06/2013] [Indexed: 12/18/2022]
Abstract
OBJECTIVES The aim of this study was to determine the role of suppressor of cytokine signaling 1 (SOCS1) in graft arteriosclerosis (GA). BACKGROUND GA, the major cause of late cardiac allograft failure, is initiated by immune-mediated endothelial activation resulting in vascular inflammation and consequent neointima formation. SOCS1, a negative regulator of cytokine signaling, is highly expressed in endothelial cells (ECs) and may prevent endothelial inflammatory responses and phenotypic activation. METHODS Clinical specimens of coronary arteries with GA, with atherosclerosis, or without disease were collected for histological analysis. SOCS1 knockout or vascular endothelial SOCS1 (VESOCS1) transgenic mice were used in an aorta transplant model of GA. Mouse aortic ECs were isolated for in vitro assays. RESULTS Dramatic but specific reduction of endothelial SOCS1 was observed in human GA and atherosclerosis specimens, which suggested the importance of SOCS1 in maintaining normal endothelial function. SOCS1 deletion in mice resulted in basal EC dysfunction. After transplantation, SOCS1-deficient aortic grafts augmented leukocyte recruitment and neointima formation, whereas endothelial overexpression of SOCS1 diminished arterial rejection. Induction of endothelial adhesion molecules in early stages of GA was suppressed by the VESOCS1 transgene, and this effect was confirmed in cultured aortic ECs. Moreover, VESOCS1 maintained better vascular function during GA progression. Mechanistically, endothelial SOCS1, by modulating both basal and cytokine-induced expression of the adhesion molecules platelet/endothelial cell adhesion molecule-1, intercellular adhesion molecule-1, and vascular cell adhesion molecule-1, restrained leukocyte adhesion and transendothelial migration during inflammatory cell infiltration. CONCLUSIONS SOCS1 prevents GA progression by preserving endothelial function and attenuating cytokine-induced adhesion molecule expression in vascular endothelium.
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Affiliation(s)
- Lingfeng Qin
- Interdepartmental Program in Vascular Biology and Therapeutics, Departments of Pathology and Surgery, Yale University School of Medicine, New Haven, Connecticut; Institute of Genetics, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Qunhua Huang
- Interdepartmental Program in Vascular Biology and Therapeutics, Departments of Pathology and Surgery, Yale University School of Medicine, New Haven, Connecticut
| | - Haifeng Zhang
- Interdepartmental Program in Vascular Biology and Therapeutics, Departments of Pathology and Surgery, Yale University School of Medicine, New Haven, Connecticut
| | - Renjing Liu
- Interdepartmental Program in Vascular Biology and Therapeutics, Departments of Pathology and Surgery, Yale University School of Medicine, New Haven, Connecticut
| | - George Tellides
- Interdepartmental Program in Vascular Biology and Therapeutics, Departments of Pathology and Surgery, Yale University School of Medicine, New Haven, Connecticut
| | - Wang Min
- Interdepartmental Program in Vascular Biology and Therapeutics, Departments of Pathology and Surgery, Yale University School of Medicine, New Haven, Connecticut.
| | - Luyang Yu
- Interdepartmental Program in Vascular Biology and Therapeutics, Departments of Pathology and Surgery, Yale University School of Medicine, New Haven, Connecticut; Institute of Genetics, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China.
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