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SH3-Binding Glutamic Acid Rich-Deficiency Augments Apoptosis in Neonatal Rat Cardiomyocytes. Int J Mol Sci 2021; 22:ijms222011042. [PMID: 34681711 PMCID: PMC8541172 DOI: 10.3390/ijms222011042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 10/05/2021] [Accepted: 10/08/2021] [Indexed: 11/16/2022] Open
Abstract
Congenital heart disease (CHD) is one of the most common birth defects in humans, present in around 40% of newborns with Down’s syndrome (DS). The SH3 domain-binding glutamic acid-rich (SH3BGR) gene, which maps to the DS region, belongs to a gene family encoding a cluster of small thioredoxin-like proteins sharing SH3 domains. Although its expression is confined to the cardiac and skeletal muscle, the physiological role of SH3BGR in the heart is poorly understood. Interestingly, we observed a significant upregulation of SH3BGR in failing hearts of mice and human patients with hypertrophic cardiomyopathy. Along these lines, the overexpression of SH3BGR exhibited a significant increase in the expression of hypertrophic markers (Nppa and Nppb) and increased cell surface area in neonatal rat ventricular cardiomyocytes (NRVCMs), whereas its knockdown attenuated cellular hypertrophy. Mechanistically, using serum response factor (SRF) response element-driven luciferase assays in the presence or the absence of RhoA or its inhibitor, we found that the pro-hypertrophic effects of SH3BGR are mediated via the RhoA–SRF axis. Furthermore, SH3BGR knockdown resulted in the induction of apoptosis and reduced cell viability in NRVCMs via apoptotic Hippo–YAP signaling. Taking these results together, we here show that SH3BGR is vital for maintaining cytoskeletal integrity and cellular viability in NRVCMs through its modulation of the SRF/YAP signaling pathways.
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Di Pisa F, Pesenti E, Bono M, Mazzarello AN, Bernardi C, Lisanti MP, Renzone G, Scaloni A, Ciccone E, Fais F, Bruno S, Scartezzini P, Ghiotto F. SH3BGRL3 binds to myosin 1c in a calcium dependent manner and modulates migration in the MDA-MB-231 cell line. BMC Mol Cell Biol 2021; 22:41. [PMID: 34380438 PMCID: PMC8356473 DOI: 10.1186/s12860-021-00379-1] [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: 01/20/2021] [Accepted: 07/26/2021] [Indexed: 11/20/2022] Open
Abstract
Background The human SH3 domain Binding Glutamic acid Rich Like 3 (SH3BGRL3) gene is highly conserved in phylogeny and widely expressed in human tissues. However, its function is largely undetermined. The protein was found to be overexpressed in several tumors, and recent work suggested a possible relationship with EGFR family members. We aimed at further highlighting on these issues and investigated SH3BGRL3 molecular interactions and its role in cellular migration ability. Results We first engineered the ErbB2-overexpressing SKBR3 cells to express exogenous SH3BGRL3, as well as wild type Myo1c or different deletion mutants. Confocal microscopy analysis indicated that SH3BGRL3 co-localized with Myo1c and ErbB2 at plasma membranes. However, co-immunoprecipitation assays and mass spectrometry demonstrated that SH3BGRL3 did not directly bind ErbB2, but specifically recognized Myo1c, on its IQ-bearing neck region. Importantly, the interaction with Myo1c was Ca2+-dependent. A role for SH3BGRL3 in cell migration was also assessed, as RNA interference of SH3BGRL3 in MDA-MB-231 cells, used as a classical migration model, remarkably impaired the migration ability of these cells. On the other side, its over-expression increased cell motility. Conclusion The results of this study provide insights for the formulation of novel hypotheses on the putative role of SH3BGRL3 protein in the regulation of myosin-cytoskeleton dialog and in cell migration. It could be envisaged the SH3BGRL3-Myo1c interaction as a regulation mechanism for cytoskeleton dynamics. It is well known that, at low Ca2+ concentrations, the IQ domains of Myo1c are bound by calmodulin. Here we found that binding of Myo1c to SH3BGRL3 requires instead the presence of Ca2+. Thus, it could be hypothesized that Myo1c conformation may be modulated by Ca2+-driven mechanisms that involve alternative binding by calmodulin or SH3BGRL3, for the regulation of cytoskeletal activity. Supplementary Information The online version contains supplementary material available at 10.1186/s12860-021-00379-1.
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Affiliation(s)
- Filippo Di Pisa
- Department of Experimental Medicine, University of Genoa, 16132, Genoa, Italy.,Translational Medicine, School of Science, Engineering and Environment (SEE), University of Salford, Greater Manchester, UK
| | - Elisa Pesenti
- Department of Experimental Medicine, University of Genoa, 16132, Genoa, Italy.,Wellcome Trust Centre for Cell Biology, Institute of Cell Biology, University of Edinburgh, Edinburgh, UK
| | - Maria Bono
- Department of Experimental Medicine, University of Genoa, 16132, Genoa, Italy
| | - Andrea N Mazzarello
- Karches Center for Oncology Research, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY, 11030, USA
| | - Cinzia Bernardi
- Molecular Pathology Unit, IRCCS Policlinico San Martino, 16132, Genoa, Italy
| | - Michael P Lisanti
- Translational Medicine, School of Science, Engineering and Environment (SEE), University of Salford, Greater Manchester, UK
| | - Giovanni Renzone
- Proteomics and Mass Spectrometry Laboratory, ISPAAM-National Research Council, 80147, Naples, Italy
| | - Andrea Scaloni
- Proteomics and Mass Spectrometry Laboratory, ISPAAM-National Research Council, 80147, Naples, Italy
| | - Ermanno Ciccone
- Department of Experimental Medicine, University of Genoa, 16132, Genoa, Italy
| | - Franco Fais
- Department of Experimental Medicine, University of Genoa, 16132, Genoa, Italy.,Molecular Pathology Unit, IRCCS Policlinico San Martino, 16132, Genoa, Italy
| | - Silvia Bruno
- Department of Experimental Medicine, University of Genoa, 16132, Genoa, Italy
| | | | - Fabio Ghiotto
- Department of Experimental Medicine, University of Genoa, 16132, Genoa, Italy. .,Molecular Pathology Unit, IRCCS Policlinico San Martino, 16132, Genoa, Italy.
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Liu Z, Xu W, Tan X, Li C. EZH2-mediated epigenetic suppression of SH3BGRL potently inhibits lung cancer progression. Biochem Biophys Res Commun 2021; 548:53-59. [PMID: 33631674 DOI: 10.1016/j.bbrc.2021.02.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 02/13/2021] [Indexed: 12/24/2022]
Abstract
Lung cancer is the leading cause of cancer-related deaths worldwide. Lung cancer stem cells (CSCs) are a small population of cancer cells with self-renewal, therapeutic resistance, and tumor relapse capability. Yet the molecular mechanisms underlying lung CSCs self-renewal remain largely unknown. Here, we report that SH3BGRL were down-regulated in lung cancer tissues comparing with normal lung tissues and SH3BGRL low expression was correlated with the poor clinical outcomes of patients with lung cancer. Moreover, SH3BGRL was also weakly expressed in lung CSCs compared with its corresponding lung cancer cells. We first characterize that EZH2 directly binds to SH3BGRL promoter and transcriptional represses SH3BGRL expression in epigenetic level. Functionally, overexpression of SH3BGRL potently suppresses Lung CSCs self-renewal in vitro. The gain of function study reveals that SH3BGRL acts as a novel tumor suppressor via inhibiting lung cancer cell proliferation and migration as well as Lung CSCs self-renewal in vitro. Collectively, our work demonstrates that SH3BGRL hold potential as a favorable prognostic marker and therapeutic target for patients with lung cancer in future.
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Affiliation(s)
- Zhiping Liu
- Department of Oncology, Shandong Provincial Third Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Wen Xu
- Department of Oncology, Shandong Provincial Third Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xiansheng Tan
- Department of Oncology, Shandong Provincial Third Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.
| | - Chunhua Li
- Department of Oncology, The Second Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China.
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Jiang M, Lash GE, Zeng S, Liu F, Han M, Long Y, Cai M, Hou H, Ning F, Hu Y, Yang H. Differential expression of serum proteins before 20 weeks gestation in women with hypertensive disorders of pregnancy: A potential role for SH3BGRL3. Placenta 2020; 104:20-30. [PMID: 33217630 DOI: 10.1016/j.placenta.2020.10.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 09/19/2020] [Accepted: 10/26/2020] [Indexed: 01/01/2023]
Abstract
INTRODUCTION The objective of this study was to explore serum levels of differentially abundant proteins between women with hypertensive disorders of pregnancy (HDP) and women with normal-term pregnancy, and to explore the contribution of SH3BGRL3 to the pathogenesis of HDP. METHODS At 6-20 weeks gestation 48 pregnant women who later developed HDP (HDP group) and 48 women with normal-term pregnancy (normal group) were recruited based on maternal age and gestational age at a 1:1 ratio. Total serum protein was extracted, denatured, deoxidized, and subjected to enzymolysis. The sample was labeled with Tandem Mass Tags and analyzed via mass spectroscopy to identify differentially abundant proteins. The role of SH3BGRL3 in trophoblast invasion, proliferation and apoptosis was examined using the HTR-8/SVneo cell line and primary isolates of extravillous trophoblast (EVT) cells. RESULTS In the proteomic profiling analysis, there were 19 proteins that showed significant differential abundance (P < 0.05). Among them, 13 proteins were more abundant and 6 proteins were less abundant in the serum from the HDP group compared with the normal group. The function of one of the more abundant proteins, SH3BGRL3, in trophoblast cell invasion, proliferation and apoptosis was investigated. Treatment of the EVT cells or the HTR-8/SVneo cell line with anti-SH3BGRL3 inhibited proliferation, but stimulated both apoptosis and invasion. MMP2 and p-ERK levels were also decreased in EVT after anti-SH3BGRL3 treatment. DISCUSSION The SH3BGRL3 protein can regulate various aspects of trophoblast biology, and may be useful in the clinical diagnosis of HDP.
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Affiliation(s)
- Min Jiang
- Department of Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, PR China
| | - Gendie E Lash
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, PR China.
| | - Shanshui Zeng
- Department of Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, PR China
| | - Fei Liu
- Department of Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, PR China
| | - Mengru Han
- Department of Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, PR China
| | - Yan Long
- Department of Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, PR China
| | - Minmin Cai
- Department of Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, PR China
| | - Huomei Hou
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, PR China
| | - Feng Ning
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, PR China
| | - Yanwei Hu
- Department of Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, PR China.
| | - Hongling Yang
- Department of Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, PR China.
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Yin L, Gao S, Shi H, Wang K, Yang H, Peng B. TIP-B1 promotes kidney clear cell carcinoma growth and metastasis via EGFR/AKT signaling. Aging (Albany NY) 2019; 11:7914-7937. [PMID: 31562290 PMCID: PMC6782011 DOI: 10.18632/aging.102298] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 09/14/2019] [Indexed: 12/14/2022]
Abstract
Kidney clear cell carcinoma (KIRC) is the most prevalent kidney malignancy. Accumulating evidence shows that high expression of TIP-B1 correlates with development of tumor progression. However, the detailed functions of TIP-B1 in the KIRC remain to be further elucidated. Here, we firstly found TIP-B1 expression was significantly increased in KIRC compared with adjacent normal tissues. What’s more, higher expression of TIP-B1 were correlated with aggressive clinico-pathological characteristics. In vitro assay found TIP-B1 knockdown dramatically inhibited KIRC cells proliferation, migration and invasion. In vivo assay found down regulated TIP-B1 could suppress tumor growth and metastasis. Mechanism analysis indicated that TIP-B1 could bind EGFR and suppress EGFR degradation, then promoted EGF-induced AKT signaling. Together, TIP-B1 could be applied as an independent risk factor to predict KIRC progression and metastasis. Targeting TIP-B1 might be a new potential therapeutic strategy for KIRC treatment.
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Affiliation(s)
- Lei Yin
- Department of Urology, Shanghai Tenth People's Hospital, School of Medicine in Tongji University, Shanghai, China
| | - Shenglin Gao
- Department of Urology, Changzhou No. 2 People's Hospital, Nanjing Medical University, Changzhou, Jiangsu, China
| | - Heng Shi
- Department of Urology, Shanghai Tenth People's Hospital, School of Medicine in Tongji University, Shanghai, China.,Department of Urology, Shanghai Tenth People's Hospital, Nanjing Medical University, Nanjing, China
| | - Keyi Wang
- Department of Urology, Shanghai Tenth People's Hospital, School of Medicine in Tongji University, Shanghai, China
| | - Huan Yang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bo Peng
- Department of Urology, Shanghai Tenth People's Hospital, School of Medicine in Tongji University, Shanghai, China
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Tong F, Zhang M, Guo X, Shi H, Li L, Guan W, Wang H, Yang S. Expression patterns of SH3BGR family members in zebrafish development. Dev Genes Evol 2016; 226:287-95. [DOI: 10.1007/s00427-016-0552-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Accepted: 05/20/2016] [Indexed: 11/25/2022]
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Shi X, Li C, Cao M, Xu X, Zhou G, Xiong YL. Comparative proteomic analysis of longissimus dorsi muscle in immuno- and surgically castrated male pigs. Food Chem 2016; 199:885-92. [DOI: 10.1016/j.foodchem.2015.11.059] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 09/15/2015] [Accepted: 11/12/2015] [Indexed: 10/22/2022]
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Chiang CY, Pan CC, Chang HY, Lai MD, Tzai TS, Tsai YS, Ling P, Liu HS, Lee BF, Cheng HL, Ho CL, Chen SH, Chow NH. SH3BGRL3 Protein as a Potential Prognostic Biomarker for Urothelial Carcinoma: A Novel Binding Partner of Epidermal Growth Factor Receptor. Clin Cancer Res 2015; 21:5601-11. [PMID: 26286913 DOI: 10.1158/1078-0432.ccr-14-3308] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Accepted: 07/27/2015] [Indexed: 11/16/2022]
Abstract
PURPOSE Mass spectrometry-based biomarker discovery has clinical benefit. To identify novel biomarkers for urothelial carcinoma, we performed quantitative proteomics on pooled urine pairs from patients with and without urothelial carcinoma. EXPERIMENTAL DESIGN Shot-gun proteomics using liquid chromatography-tandem mass spectrometry and stable isotope dimethyl labeling identified 219 candidate proteins. The potential implication of SH3 domain binding glutamic acid-rich protein like 3 (SH3BGRL3) was examined by immunoblotting of the urine (n = 13) and urothelial tumors (n = 32). Additional immunohistochemistry was performed on bladder cancer array (n = 1145) and correlated with tumor aggressiveness. Then, biologic functions and signaling pathways of SH3BGRL3 were explored using stable cell lines. RESULTS The detectable urine SH3BGRL3 in patients with urothelial carcinoma was positively associated with higher histologic grading and muscle invasiveness of urothelial carcinoma. SH3BGRL3 is expressed in 13.9% (159/1145) of bladder cancer cohort and is positively associated with muscle invasion (P = 0.0028). SH3BGRL3 expression is associated with increased risk of progression in patients with nonmuscle-invasive bladder cancer (P = 0.032). SH3BGRL3 expression is significantly associated with a high level of epidermal growth factor receptor (EGFR) in bladder cancer (P < 0.0001). SH3BGRL3 promotes the epithelial-mesenchymal transition, cell migration, and proliferation of urothelial carcinoma in vitro. SH3BGRL3 interacts with phosphor-EGFR at Y1068, Y1086, and Y1173 through Grb2 by its proline-rich motif, and activates the Akt-associated signaling pathway. CONCLUSIONS Evaluation of SH3BGRL3 expression status or urine content may identify a subset of patients with bladder cancer who may require more intensive treatment. SH3BGRL3 deserves further investigation as a cotargeting candidate for designing EGFR-based cancer therapies. Clin Cancer Res; 21(24); 5601-11. ©2015 AACR.
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Affiliation(s)
- Cheng-Yao Chiang
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chin-Chen Pan
- Department of Pathology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Hong-Yi Chang
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Ming-Derg Lai
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan. Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Tzong-Shin Tzai
- Department of Urology, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Yuh-Shyan Tsai
- Department of Urology, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Pin Ling
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan. Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hsiao-Sheng Liu
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan. Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Bi-Fang Lee
- Department of Nuclear Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Hong-Ling Cheng
- Department of Urology, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Chung-Liang Ho
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan. Department of Pathology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Shu-Hui Chen
- Department of Chemistry, College of Sciences, National Cheng Kung University, Tainan, Taiwan
| | - Nan-Haw Chow
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan. Department of Pathology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
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Jang DG, Sim HJ, Song EK, Medina-Ruiz S, Seo JK, Park TJ. A thioredoxin fold protein Sh3bgr regulates Enah and is necessary for proper sarcomere formation. Dev Biol 2015; 405:1-9. [PMID: 26116879 DOI: 10.1016/j.ydbio.2015.06.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 06/02/2015] [Accepted: 06/05/2015] [Indexed: 01/15/2023]
Abstract
The sh3bgr (SH3 domain binding glutamate-rich) gene encodes a small protein containing a thioredoxin-like fold, SH3 binding domain, and glutamate-rich domain. Originally, it was suggested that increased expression of Sh3bgr may cause the cardiac phenotypes in Down's syndrome. However, it was recently reported that the overexpression of Sh3bgr did not cause any disease phenotypes in mice. In this study, we have discovered that Sh3bgr is critical for sarcomere formation in striated muscle tissues and also for heart development. Sh3bgr is strongly expressed in the developing somites and heart in Xenopus. Morpholino mediated-knockdown of sh3bgr caused severe malformation of heart tissue and disrupted segmentation of the somites. Further analysis revealed that Sh3bgr specifically localized to the Z-line in mature sarcomeres and that knockdown of Sh3bgr completely disrupted sarcomere formation in the somites. Moreover, overexpression of Sh3bgr resulted in abnormally discontinues thick firmaments in the somitic sarcomeres. We suggest that Sh3bgr does its function at least partly by regulating localization of Enah for the sarcomere formation. In addition, we provide the data supporting Sh3bgr is also necessary for proper heart development in part by affecting the Enah protein level.
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Affiliation(s)
- Dong Gil Jang
- School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Korea
| | - Hyo Jung Sim
- School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Korea
| | - Eun Kyung Song
- School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Korea
| | - Sofia Medina-Ruiz
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | - Jeong Kon Seo
- UNIST Central Research Facility, Ulsan National Institute of Science and Technology, Ulsan, Korea
| | - Tae Joo Park
- School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Korea.
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Hutchison ER, Kawamoto EM, Taub DD, Lal A, Abdelmohsen K, Zhang Y, Wood WH, Lehrmann E, Camandola S, Becker KG, Gorospe M, Mattson MP. Evidence for miR-181 involvement in neuroinflammatory responses of astrocytes. Glia 2013; 61:1018-28. [PMID: 23650073 DOI: 10.1002/glia.22483] [Citation(s) in RCA: 190] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 01/23/2013] [Indexed: 12/12/2022]
Abstract
Inflammation is a common component of acute injuries of the central nervous system (CNS) such as ischemia, and degenerative disorders such as Alzheimer's disease. Glial cells play important roles in local CNS inflammation, and an understanding of the roles for microRNAs in glial reactivity in injury and disease settings may therefore lead to the development of novel therapeutic interventions. Here, we show that the miR-181 family is developmentally regulated and present in high amounts in astrocytes compared to neurons. Overexpression of miR-181c in cultured astrocytes results in increased cell death when exposed to lipopolysaccharide (LPS). We show that miR-181 expression is altered by exposure to LPS, a model of inflammation, in both wild-type and transgenic mice lacking both receptors for the inflammatory cytokine TNF-α. Knockdown of miR-181 enhanced LPS-induced production of pro-inflammatory cytokines (TNF-α, IL-6, IL-1β, IL-8) and HMGB1, while overexpression of miR-181 resulted in a significant increase in the expression of the anti-inflammatory cytokine IL-10. To assess the effects of miR-181 on the astrocyte transcriptome, we performed gene array and pathway analysis on astrocytes with reduced levels of miR-181b/c. To examine the pool of potential miR-181 targets, we employed a biotin pull-down of miR-181c and gene array analysis. We validated the mRNAs encoding MeCP2 and X-linked inhibitor of apoptosis as targets of miR-181. These findings suggest that miR-181 plays important roles in the molecular responses of astrocytes in inflammatory settings. Further understanding of the role of miR-181 in inflammatory events and CNS injury could lead to novel approaches for the treatment of CNS disorders with an inflammatory component.
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Affiliation(s)
- Emmette R Hutchison
- Laboratory of Neurosciences, National Institute on Aging, NIH, Baltimore, Maryland, 21224, USA
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Ly L, Wasinger VC. Mass and charge selective protein fractionation for the differential analysis of T-cell and CD34+ stem cell proteins from cord blood. J Proteomics 2010; 73:571-8. [DOI: 10.1016/j.jprot.2009.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2009] [Revised: 08/11/2009] [Accepted: 09/02/2009] [Indexed: 12/11/2022]
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Majid SM, Liss AS, You M, Bose HR. The suppression of SH3BGRL is important for v-Rel-mediated transformation. Oncogene 2006; 25:756-68. [PMID: 16186799 DOI: 10.1038/sj.onc.1209107] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The v-rel oncogene is the most efficient transforming member of the Rel/NF-kappaB family of transcription factors. v-Rel induces avian and mammalian lymphoid cell tumors and transforms chicken embryo fibroblasts in culture by the aberrant regulation of genes under the control of Rel/NF-kappaB proteins. Here we report that the expression of SH3BGRL, a member of the SH3BGR (SH3 domain-binding glutamic acid-rich) family of proteins, is downregulated in v-Rel-expressing fibroblasts, lymphoid cells, and splenic tumor cells. Chromatin immunoprecipitation experiments demonstrated that v-Rel binds to the sh3bgrl promoter in transformed cells. Coexpression of SH3BGRL with v-Rel in primary splenic lymphocytes reduced the number of colonies formed by 76%. Mutations in the predicted SH3-binding domain of SH3BGRL abolished the suppressive effect on v-Rel transformation and resulted in colony numbers comparable to those formed by v-Rel alone. However, mutations in the predicted EVH1-binding domain of SH3BGRL only had a modest effect on suppression of v-Rel transformation. This study provides the first example of a gene that is downregulated in v-Rel-expressing cells that also plays a role in v-Rel transformation.
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Affiliation(s)
- S M Majid
- Section of Molecular Genetics and Microbiology, Institute of Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712-1095, USA
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Xu C, Zheng P, Shen S, Xu Y, Wei L, Gao H, Wang S, Zhu C, Tang Y, Wu J, Zhang Q, Shi Y. NMR structure and regulated expression in APL cell of human SH3BGRL3. FEBS Lett 2005; 579:2788-94. [PMID: 15907482 DOI: 10.1016/j.febslet.2005.04.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2005] [Revised: 04/04/2005] [Accepted: 04/04/2005] [Indexed: 10/25/2022]
Abstract
SH3 domain binding glutamic acid-rich protein like 3 (SH3BGRL3) is the new member of thioredoxin (TRX) super family, whose posttranslational modified form was identified as tumor necrosis factor alpha (TNF-alpha) inhibitory protein, TIP-B1. In this paper, we determined its solution structure by multi-dimensional nuclear magnetic resonance spectroscopy. The overall structure of human SH3BGRL3 conformed to a TRX-like fold. To understand its function in vivo, the upregulated expression in acute promyelocytic leukemia cell line NB4 at both mRNA and protein level was elucidated. Immunofluorescence and immunohistochemistry staining with monoclonal antibody against SH3BGRL3 demonstrated that it was a cytoplasmic protein in both NB4 cell and human tissues. These results, as a whole, indicate that SH3BGRL3 may function as a regulator in all-trans retinoic acid-induced pathway.
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Affiliation(s)
- Chao Xu
- Hefei National Laboratory for Physical Sciences at Microscale, School of Life Sciences, University of Science and Technology of China
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14
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Nardini M, Mazzocco M, Massaro A, Maffei M, Vergano A, Donadini A, Scartezzini P, Bolognesi M. Crystal structure of the glutaredoxin-like protein SH3BGRL3 at 1.6Å resolution. Biochem Biophys Res Commun 2004; 318:470-6. [PMID: 15120624 DOI: 10.1016/j.bbrc.2004.04.050] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2004] [Indexed: 11/19/2022]
Abstract
We report the 1.6 Angstrom resolution crystal structure of SH3BGRL3, a member of a new mammalian protein family of unknown function. The observed "thioredoxin fold" of SH3BGRL3 matches the tertiary structure of glutaredoxins, even in the N-terminal region where the sequence similarity between the two protein families is negligible. In particular, SH3BGRL3 displays structural modifications at the N-terminal Cys-x-x-Cys loop, responsible for glutathione binding and catalysis in glutaredoxins. The loop hosts a six residue insertion, yielding an extra N-terminal-capped helical turn, first observed here for the thioredoxin fold. This, together with deletion of both Cys residues, results in a substantial reshaping of the neighboring cleft, where glutathione is hosted in glutaredoxins. While not active in redox reaction and glutathione binding, SH3BGRL3 may act as an endogenous modulator of glutaredoxin activities by competing, with its fully conserved thioredoxin fold, for binding to yet unknown target proteins.
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Affiliation(s)
- Marco Nardini
- Dipartimento di Fisica-INFM e Centro di Eccellenza per la Ricerca Biomedica, Università di Genova, Via Dodecaneso 33, 16146 Genoa, Italy
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Mazzocco M, Maffei M, Egeo A, Vergano A, Arrigo P, Di Lisi R, Ghiotto F, Scartezzini P. The identification of a novel human homologue of the SH3 binding glutamic acid-rich (SH3BGR) gene establishes a new family of highly conserved small proteins related to Thioredoxin Superfamily. Gene 2002; 291:233-9. [PMID: 12095696 DOI: 10.1016/s0378-1119(02)00602-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The SH3 binding glutamic acid-rich (SH3BGR) gene was cloned in an effort to identify genes located to human chromosome 21, within the congenital heart disease region, and expressed in the developing heart. After the identification of SH3BGR, two human homologous genes, SH3BGRL and SH3BGRL3, were identified and mapped to chromosome Xq13.3 and 1p34.3-35, respectively. SH3BGRL and SH3BGRL3 code for small proteins similar to the N-terminal region of the SH3BGR protein. SH3BGRL3 protein shows a significant similarity to Glutaredoxin 1 of Escherichia coli, and all the three proteins are predicted to belong to Thioredoxin-like protein Superfamily. Here we describe the identification and characterization of an additional human homologue of SH3BGR, named SH3BGRL2. The SH3BGRL2 gene maps to chromosome 6q13-15 and its messenger RNA has a large 3' untranslated region containing several AUUUA repeats. SH3BGRL2 codes for a protein of 107 amino acids, which, like SH3BGRL and SH3BGRL3 proteins, is highly homologous to the N-terminal region of the SH3BGR protein and appears to be related to Glutaredoxins and to PKC-interacting cousin of thioredoxin homology domain. We propose that the identification of SH3BGRL2 establishes a novel family of human genes, coding for highly conserved small proteins belonging to Thioredoxin-like protein Superfamily.
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Affiliation(s)
- Michela Mazzocco
- Divisione di Neonatologia, E.O. Ospedali Galliera, Mura delle Cappuccine 14, I-16128 Genoa, Italy
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