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Sun Y, Wei H, Yu W, Gao H, Li J, Li X, Zhang H, Zhang H, Miao S, Zhao L, Yang R, Xu J, Lu Y, Wei F, Zhou H, Gao D, Jin Y, Zhang L. The actin-binding protein drebrin disrupts NF2-LATS kinases complex assembly to facilitate liver tumorigenesis. Hepatology 2024:01515467-990000000-01039. [PMID: 39325963 DOI: 10.1097/hep.0000000000001063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 07/17/2024] [Indexed: 09/28/2024]
Abstract
BACKGROUND AND AIMS The Hippo signaling has emerged as a crucial regulator of tissue homeostasis, regeneration, and tumorigenesis, representing a promising therapeutic target. Neurofibromin 2 (NF2), a component of Hippo signaling, is directly linked to human cancers but has been overlooked as a target for cancer therapy. APPROACH AND RESULTS Through a high-content RNA interference genome-wide screen, the actin-binding protein Drebrin (DBN1) has been identified as a novel modulator of YAP localization. Further investigations have revealed that DBN1 directly interacts with NF2, disrupting the activation of large tumor suppressor kinases (LATS1/2) by competing with LATS kinases for NF2 binding. Consequently, DBN1 knockout considerably promotes YAP nuclear exclusion and repression of target gene expression, thereby preventing cell proliferation and liver tumorigenesis. We identified three lysine residues (K238, K248, and K252) essential for DBN1-NF2 interaction and developed a mutant DBN1 (DBN1-3Kmut) that is defective in NF2 binding and incompetent to trigger NF2-dependent YAP activation and tumorigenesis both in vitro and in vivo. Furthermore, BTP2, a DBN1 inhibitor, successfully restored NF2-LATS kinase binding and elicited potent antitumor activity. The combination of sorafenib and BTP2 exerted synergistic inhibitory effects against HCC. CONCLUSIONS Our study identifies a novel DBN1-NF2-LATS axis, and pharmacological inhibition of DBN1 represents a promising alternative intervention targeting the Hippo pathway in cancer treatment.
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Affiliation(s)
- Yang Sun
- Sheng Yushou Center of Cell Biology and Immunology, Department of Genetics and Developmental Science, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Minghang, Shanghai, China
| | - Henan Wei
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Wentao Yu
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Haoran Gao
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Jinhui Li
- HuidaGene Therapeutics Co., Ltd., Shanghai, China
| | - Xiaoyu Li
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Haijiao Zhang
- Sheng Yushou Center of Cell Biology and Immunology, Department of Genetics and Developmental Science, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Minghang, Shanghai, China
| | - Haoen Zhang
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Sen Miao
- Department of Pathology, Affiliated Hospital of Jining Medical University, Jining, China
| | - Lihua Zhao
- Department of Pathology, Affiliated Hospital of Jining Medical University, Jining, China
| | - Ruizeng Yang
- Sheng Yushou Center of Cell Biology and Immunology, Department of Genetics and Developmental Science, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Minghang, Shanghai, China
| | - Jinjin Xu
- Sheng Yushou Center of Cell Biology and Immunology, Department of Genetics and Developmental Science, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Minghang, Shanghai, China
| | - Yi Lu
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Fang Wei
- Sheng Yushou Center of Cell Biology and Immunology, Department of Genetics and Developmental Science, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Minghang, Shanghai, China
| | - Hu Zhou
- State Key Laboratory of Drug Research, Department of Analytical Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Daming Gao
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Yunyun Jin
- Sheng Yushou Center of Cell Biology and Immunology, Department of Genetics and Developmental Science, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Minghang, Shanghai, China
- Department of Emergency and Critical Care Medicine, Shanghai Pudong New Area People's Hospital, Shanghai, China
| | - Lei Zhang
- Sheng Yushou Center of Cell Biology and Immunology, Department of Genetics and Developmental Science, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Minghang, Shanghai, China
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
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2
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Guan K, Liu K, Jiang Y, Bian J, Gao Y, Dong E, Li Z. Nanoparticles Internalization through HIP-55-Dependent Clathrin Endocytosis Pathway. NANO LETTERS 2023; 23:11477-11484. [PMID: 38084909 DOI: 10.1021/acs.nanolett.3c03074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Nanoparticles are promising tools for biomedicine. Many nanoparticles are internalized to function. Clathrin-mediated endocytosis is one of the most important mechanisms for nanoparticle internalization. However, the regulatory mechanism of clathrin-mediated nanoparticle endocytosis is still unclear. Here, we report that the adapter protein HIP-55 regulates clathrin-mediated nanoparticle endocytosis. CdSe/ZnS quantum dots (QDs), a typical nanoparticle, enter cells through the HIP-55-dependent clathrin endocytosis pathway. Both pharmacological inhibitor and genetic intervention demonstrate that QDs enter cells through clathrin-mediated endocytosis. HIP-55 can interact with clathrin and promote clathrin-mediated QDs endocytosis. Furthermore, HIP-55 ΔADF which is defective in F-actin binding fails to promote QDs endocytosis, indicating HIP-55 promotes clathrin-mediated QDs endocytosis depending on interaction with F-actin. In vivo, HIP-55 knockout also inhibits endocytosis of QDs. These findings reveal that HIP-55 acts as an intrinsic regulator for clathrin-mediated nanoparticle endocytosis, providing new insight into the nanoparticle internalization and a new strategy for nanodrug enrichment in target cells.
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Affiliation(s)
- Kaihang Guan
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; Beijing Key Laboratory of Cardiovascular Receptors Research; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health; State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University; Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing 100191, China
| | - Kai Liu
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; Beijing Key Laboratory of Cardiovascular Receptors Research; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health; State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University; Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing 100191, China
| | - Yunqi Jiang
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; Beijing Key Laboratory of Cardiovascular Receptors Research; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health; State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University; Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing 100191, China
| | - Jingwei Bian
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; Beijing Key Laboratory of Cardiovascular Receptors Research; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health; State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University; Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing 100191, China
| | - Yang Gao
- Research Center for Cardiopulmonary Rehabilitation, University of Health and Rehabilitation Sciences Qingdao Hospital (Qingdao Municipal Hospital), School of Health and Life Sciences, University of Health and Rehabilitation Sciences, Qingdao 266071, China
| | - Erdan Dong
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; Beijing Key Laboratory of Cardiovascular Receptors Research; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health; State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University; Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing 100191, China
- Research Center for Cardiopulmonary Rehabilitation, University of Health and Rehabilitation Sciences Qingdao Hospital (Qingdao Municipal Hospital), School of Health and Life Sciences, University of Health and Rehabilitation Sciences, Qingdao 266071, China
- Haihe Laboratory of Cell Ecosystem, Beijing 100191, China
| | - Zijian Li
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; Beijing Key Laboratory of Cardiovascular Receptors Research; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health; State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University; Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing 100191, China
- Department of Pharmacy, Peking University Third Hospital, Beijing 100191, China
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3
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Cerro-Chiang G, Ayres M, Rivas A, Romero T, Parker SJ, Mastali M, Elashoff D, Chen P, Van Eyk JE, Wolters PJ, Boin F, Zaman T. Protein biomarkers of disease progression in patients with systemic sclerosis associated interstitial lung disease. Sci Rep 2023; 13:8645. [PMID: 37244972 PMCID: PMC10224939 DOI: 10.1038/s41598-023-35840-y] [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: 12/12/2022] [Accepted: 05/24/2023] [Indexed: 05/29/2023] Open
Abstract
Systemic sclerosis is a rare connective tissue disease; and interstitial lung disease (SSc-ILD) is associated with significant morbidity and mortality. There are no clinical, radiologic features, nor biomarkers that identify the specific time when patients are at risk for progression at which the benefits from treatment outweigh the risks. Our study aimed to identify blood protein biomarkers associated with progression of interstitial lung disease in patients with SSc-ILD using an unbiased, high-throughput approach. We classified SSc-ILD as progressive or stable based on change in forced vital capacity over 12 months or less. We profiled serum proteins by quantitative mass spectrometry and analyzed the association between protein levels and progression of SSc-ILD via logistic regression. The proteins associated with at a p value of < 0.1 were queried in the ingenuity pathway analysis (IPA) software to identify interaction networks, signaling, and metabolic pathways. Through principal component analysis, the relationship between the top 10 principal components and progression was evaluated. Unsupervised hierarchical clustering with heatmapping was done to define unique groups. The cohort consisted of 72 patients, 32 with progressive SSc-ILD and 40 with stable disease with similar baseline characteristics. Of a total of 794 proteins, 29 were associated with disease progression. After adjusting for multiple testing, these associations did not remain significant. IPA identified five upstream regulators that targeted proteins associated with progression, as well as a canonical pathway with a higher signal in the progression group. Principal component analysis showed that the ten components with the highest Eigenvalues represented 41% of the variability of the sample. Unsupervised clustering analysis revealed no significant heterogeneity between the subjects. We identified 29 proteins associated with progressive SSc-ILD. While these associations did not remain significant after accounting for multiple testing, some of these proteins are part of pathways relevant to autoimmunity and fibrogenesis. Limitations included a small sample size and a proportion of immunosuppressant use in the cohort, which could have altered the expression of inflammatory and immunologic proteins. Future directions include a targeted evaluation of these proteins in another SSc-ILD cohort or application of this study design to a treatment naïve population.
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Affiliation(s)
- Giuliana Cerro-Chiang
- Division of Pulmonary and Critical Care Medicine, Cedars Sinai Medical Center, 8700 Beverly Blvd., South Tower Room 6723, Los Angeles, CA, 90048, USA.
| | - Matthew Ayres
- Advanced Clinical Biosystems Institute Biomedical Sciences, The Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - Alejandro Rivas
- Advanced Clinical Biosystems Institute Biomedical Sciences, The Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - Tahmineh Romero
- Division of General Internal Medicine and Health Services Research, University of California Los Angeles, Los Angeles, CA, USA
| | - Sarah J Parker
- Advanced Clinical Biosystems Institute Biomedical Sciences, The Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - Mitra Mastali
- Advanced Clinical Biosystems Institute Biomedical Sciences, The Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - David Elashoff
- Division of General Internal Medicine and Health Services Research, University of California Los Angeles, Los Angeles, CA, USA
| | - Peter Chen
- Division of Pulmonary and Critical Care Medicine, Cedars Sinai Medical Center, 8700 Beverly Blvd., South Tower Room 6723, Los Angeles, CA, 90048, USA
| | - Jennifer E Van Eyk
- Advanced Clinical Biosystems Institute Biomedical Sciences, The Smidt Heart Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - Paul J Wolters
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine., University of California, San Francisco, San Francisco, CA, USA
| | - Francesco Boin
- Division of Rheumatology, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - Tanzira Zaman
- Division of Pulmonary and Critical Care Medicine, Cedars Sinai Medical Center, 8700 Beverly Blvd., South Tower Room 6723, Los Angeles, CA, 90048, USA
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4
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Zhou L, Wang T, Zhang K, Zhang X, Jiang S. The development of small-molecule inhibitors targeting HPK1. Eur J Med Chem 2022; 244:114819. [DOI: 10.1016/j.ejmech.2022.114819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 09/29/2022] [Accepted: 09/30/2022] [Indexed: 11/25/2022]
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5
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Zhu Q, Chen N, Tian X, Zhou Y, You Q, Xu X. Hematopoietic Progenitor Kinase 1 in Tumor Immunology: A Medicinal Chemistry Perspective. J Med Chem 2022; 65:8065-8090. [PMID: 35696642 DOI: 10.1021/acs.jmedchem.2c00172] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hematopoietic progenitor kinase 1 (HPK1), a hematopoietic cell-restricted member of the serine/threonine Ste20-related protein kinases, is a negative regulator of the T cell receptor, B cell receptor, and dendritic cells. Loss of HPK1 kinase function increases cytokine secretion and enhances T cell signaling, virus clearance, and tumor growth inhibition. Therefore, HPK1 is considered a promising target for tumor immunotherapy. Several HPK1 inhibitors have been reported to regulate T cell function. In addition, HPK1-targeting PROTACs, which can induce the degradation of HPK1, have also been developed. Here, we provide an overview of research concerning HPK1 protein structure, function, and inhibitors and propose perspectives and insights for the future development of agents targeting HPK1.
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Affiliation(s)
- Qiangsheng Zhu
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Nannan Chen
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Xinjian Tian
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Yeling Zhou
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - QiDong You
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Xiaoli Xu
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
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6
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Sun Y, Li ZJ. The multifunctional adaptor protein HIP-55 couples Smad7 to accelerate TGF-β type I receptor degradation. Acta Pharmacol Sin 2022; 43:634-644. [PMID: 34331017 PMCID: PMC8888702 DOI: 10.1038/s41401-021-00741-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 07/05/2021] [Indexed: 02/07/2023] Open
Abstract
Transforming growth factor β (TGF-β) is a multifunctional polypeptide that plays critical roles in regulating a broad range of cellular functions and physiological processes. TGF-β signalling dysfunction contributes to many disorders, such as cardiovascular diseases, cancer and immunological diseases. The homoeostasis of negative feedback regulation is critical for signal robustness, duration and specificity, which precisely control physiological and pathophysiological processes. However, the underlying mechanism by which the negative regulation of TGF-β signalling is integrated and coordinated is still unclear. Here, we reveal that haematopoietic progenitor kinase-interacting protein of 55 kDa (HIP-55) was upregulated upon TGF-β stimulation, while the loss of HIP-55 caused TGF-β signalling overactivation and the abnormal accumulation of downstream extracellular matrix (ECM) genes. HIP-55 interacts with Smad7 and competes with Smad7/Axin complex formation to inhibit the Axin-mediated degradation of Smad7. HIP-55 further couples Smad7 to TβRI but not TβRII, driving TβRI degradation. Altogether, our findings demonstrate a new mechanism by which the effector and negative feedback functions of HIP-55 are coupled and may provide novel strategies for the treatment of TGF-β signalling-related human diseases.
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Affiliation(s)
- Yang Sun
- grid.419897.a0000 0004 0369 313XDepartment of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health; Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191 China
| | - Zi-jian Li
- grid.419897.a0000 0004 0369 313XDepartment of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health; Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191 China
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7
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Naddaf E, Dasari S, Selcen D, Charlesworth MC, Johnson KL, Mauermann ML, Kourelis T. Proteomic profiling of sporadic late-onset nemaline myopathy. Ann Clin Transl Neurol 2022; 9:391-402. [PMID: 35187860 PMCID: PMC8935314 DOI: 10.1002/acn3.51527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 02/04/2022] [Indexed: 11/08/2022] Open
Abstract
Objective To define the proteomic profile of sporadic late‐onset nemaline myopathy (SLONM) and explore its pathogenesis. Methods We performed mass spectrometry on laser‐dissected frozen muscle samples from five patients with SLONM, three of whom with an associated monoclonal protein (MP), and four controls, to determine the proteomic profile of SLONM. Furthermore, we assessed the role of the MP by evaluating the expression of the immunoglobulin light chain variable regions (IGVL). Results There were 294 differentially expressed proteins: 272 upregulated and 22 downregulated. Among the top 100 upregulated proteins, the most common categories were: nuclear or nucleic acid metabolism (24%), extracellular matrix and basal lamina (17%), immune response (13%), and actin dynamics (8%). Downregulated proteins consisted mostly of contractile proteins. Among upregulated proteins, there were 65 with a role related to the immune system, including eight proteins involved in major histocompatibility complex 1 (MHC1) and antigen processing, 15 in MHCII complex and phagocytosis, and 23 in B and/or T‐cell function. Among nine upregulated immunoglobulin proteins, there were two IGVL genes. However, these were also detected in SLONM cases without an MP, with no evidence of clonally dominant immunoglobulin deposition. In muscle sections from SLONM patients, nemaline rods tended to accumulate in atrophic fibers with marked rarefaction of the myofibrils. Increased MHC1 reactivity was present in fibers containing nemaline rods as well as adjacent nonatrophic fibers. Conclusion Our findings suggest that aberrant immune activation is present in SLONM, but do not support a direct causal relationship between the MP and SLONM.
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Affiliation(s)
- Elie Naddaf
- Division of Neuromuscular Medicine, Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | - Surendra Dasari
- Department of Qualitative Health Sciences, Mayo Clinic, Rochester, Minnesota, USA
| | - Duygu Selcen
- Division of Neuromuscular Medicine, Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Kenneth L Johnson
- Medical Genome Facility Proteomics Core, Mayo Clinic, Rochester, Minnesota, USA
| | - Michelle L Mauermann
- Division of Neuromuscular Medicine, Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | - Taxiarchis Kourelis
- Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA
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8
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Chan ACY, Wong HY, Chong YF, Lai PS, Teoh HL, Ng AYY, Hung JHM, Chan YC, Ng KWP, Vijayan J, Ong JJY, Chandra B, Tan CH, Rutt NH, Tan TM, Ismail NH, Wilder-Smith E, Schwarz H, Choi H, Sharma VK, Mak A. Novel Autoantibodies in Idiopathic Small Fiber Neuropathy. Ann Neurol 2021; 91:66-77. [PMID: 34761434 PMCID: PMC9300200 DOI: 10.1002/ana.26268] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 11/08/2021] [Accepted: 11/08/2021] [Indexed: 01/04/2023]
Abstract
Objective Small fiber neuropathy (SFN) is clinically and etiologically heterogeneous. Although autoimmunity has been postulated to be pathophysiologically important in SFN, few autoantibodies have been described. We aimed to identify autoantibodies associated with idiopathic SFN (iSFN) by a novel high‐throughput protein microarray platform that captures autoantibodies expressed in the native conformational state. Methods Sera from 58 SFN patients and 20 age‐ and gender‐matched healthy controls (HCs) were screened against >1,600 immune‐related antigens. Fluorescent unit readout and postassay imaging were performed, followed by composite data normalization and protein fold change (pFC) analysis. Analysis of an independent validation cohort of 33 SFN patients against the same 20 HCs was conducted to identify reproducible proteins in both cohorts. Results Nine autoantibodies were screened with statistical significance and pFC criteria in both cohorts, with at least 50% change in serum levels. Three proteins showed consistently high fold changes in main and validation cohorts: MX1 (FC = 2.99 and 3.07, respectively, p = 0.003, q = 0.076), DBNL (FC = 2.11 and 2.16, respectively, p = 0.009, q < 0.003), and KRT8 (FC = 1.65 and 1.70, respectively, p = 0.043, q < 0.003). Further subgroup analysis into iSFN and SFN by secondary causes (secondary SFN) in the main cohort showed that MX1 is higher in iSFN compared to secondary SFN (FC = 1.61 vs 0.106, p = 0.009). Interpretation Novel autoantibodies MX1, DBNL, and KRT8 are found in iSFN. MX1 may allow diagnostic subtyping of iSFN patients. ANN NEUROL 2022;91:66–77
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Affiliation(s)
- Amanda C Y Chan
- Division of Neurology, Department of Medicine, National University Health System, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Hiu Yi Wong
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong.,Hong Kong Center for Neurodegenerative Diseases, Hong Kong Science Park, Pak Shek Kok, China
| | - Yao Feng Chong
- Division of Neurology, Department of Medicine, National University Health System, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Poh San Lai
- Department of Pediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Hock Luen Teoh
- Division of Neurology, Department of Medicine, National University Health System, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Alison Y Y Ng
- Division of Neurology, Department of Medicine, National University Health System, Singapore
| | - Jennifer H M Hung
- Division of Neurology, Department of Medicine, National University Health System, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Yee Cheun Chan
- Division of Neurology, Department of Medicine, National University Health System, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Kay W P Ng
- Division of Neurology, Department of Medicine, National University Health System, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Joy Vijayan
- Division of Neurology, Department of Medicine, National University Health System, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Jonathan J Y Ong
- Division of Neurology, Department of Medicine, National University Health System, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Bharatendu Chandra
- Division of Neurology, Department of Medicine, National University Health System, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Division of Medical Genetics, University of Iowa, Iowa City, IA, USA
| | - Chi Hsien Tan
- Division of Neurology, Department of Medicine, National University Health System, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | | | | | | | - Einar Wilder-Smith
- Department of Neurology, Inselspital Bern, University of Bern, Bern, Switzerland
| | - Herbert Schwarz
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Hyungwon Choi
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Vijay K Sharma
- Division of Neurology, Department of Medicine, National University Health System, Singapore.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Anselm Mak
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Division of Rheumatology, University Medicine Cluster, National University Health System, Singapore
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9
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Charpentier JC, King PD. Mechanisms and functions of endocytosis in T cells. Cell Commun Signal 2021; 19:92. [PMID: 34503523 PMCID: PMC8427877 DOI: 10.1186/s12964-021-00766-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 07/17/2021] [Indexed: 11/11/2022] Open
Abstract
Once thought of primarily as a means to neutralize pathogens or to facilitate feeding, endocytosis is now known to regulate a wide range of eukaryotic cell processes. Among these are regulation of signal transduction, mitosis, lipid homeostasis, and directed migration, among others. Less well-appreciated are the roles various forms of endocytosis plays in regulating αβ and, especially, γδ T cell functions, such as T cell receptor signaling, antigen discovery by trogocytosis, and activated cell growth. Herein we examine the contribution of both clathrin-mediated and clathrin-independent mechanisms of endocytosis to T cell biology. Video Abstract
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Affiliation(s)
- John C Charpentier
- Department of Microbiology and Immunology, University of Michigan Medical School, 6606 Med Sci II, 1150 West Medical Center Drive, Ann Arbor, MI, 48109-5620, USA
| | - Philip D King
- Department of Microbiology and Immunology, University of Michigan Medical School, 6606 Med Sci II, 1150 West Medical Center Drive, Ann Arbor, MI, 48109-5620, USA.
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10
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Herrera A, Menendez A, Torroba B, Ochoa A, Pons S. Dbnl and β-catenin promote pro-N-cadherin processing to maintain apico-basal polarity. J Cell Biol 2021; 220:212044. [PMID: 33939796 PMCID: PMC8097490 DOI: 10.1083/jcb.202007055] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 02/15/2021] [Accepted: 03/15/2021] [Indexed: 12/30/2022] Open
Abstract
The neural tube forms when neural stem cells arrange into a pseudostratified, single-cell–layered epithelium, with a marked apico-basal polarity, and in which adherens junctions (AJs) concentrate in the subapical domain. We previously reported that sustained β-catenin expression promotes the formation of enlarged apical complexes (ACs), enhancing apico-basal polarity, although the mechanism through which this occurs remained unclear. Here, we show that β-catenin interacts with phosphorylated pro-N-cadherin early in its transit through the Golgi apparatus, promoting propeptide excision and the final maturation of N-cadherin. We describe a new β-catenin–dependent interaction of N-cadherin with Drebrin-like (Dbnl), an actin-binding protein that is involved in anterograde Golgi trafficking of proteins. Notably, Dbnl knockdown led to pro-N-cadherin accumulation and limited AJ formation. In brief, we demonstrate that Dbnl and β-catenin assist in the maturation of pro-N-cadherin, which is critical for AJ formation and for the recruitment AC components like aPKC and, consequently, for the maintenance of apico-basal polarity.
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Affiliation(s)
- Antonio Herrera
- Instituto de Biología Molecular de Barcelona, Parc Científic de Barcelona, Barcelona, Spain
| | - Anghara Menendez
- Instituto de Biología Molecular de Barcelona, Parc Científic de Barcelona, Barcelona, Spain
| | - Blanca Torroba
- Instituto de Biología Molecular de Barcelona, Parc Científic de Barcelona, Barcelona, Spain
| | - Andrea Ochoa
- Instituto de Biología Molecular de Barcelona, Parc Científic de Barcelona, Barcelona, Spain
| | - Sebastián Pons
- Instituto de Biología Molecular de Barcelona, Parc Científic de Barcelona, Barcelona, Spain
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11
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Ghosh A, Enderlein J, Butkevich E. Dimerization of Human Drebrin-like Protein Governs Its Biological Activity. Biochemistry 2020; 59:1553-1558. [PMID: 32282191 DOI: 10.1021/acs.biochem.9b01095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Drebrin-like protein (DBNL) is a multidomain F-actin-binding protein, which also interacts with other molecules within different intracellular pathways. Here, we present quantitative measurements on the size and conformation of human DBNL. Using dual-focus fluorescence correlation spectroscopy, we determined the hydrodynamic radius of the DBNL monomer. Native gel electrophoresis and dual-color fluorescence cross-correlation spectroscopy show that both endogenous DBNL and recombinant DBNL exist as dimers under physiological conditions. We demonstrate that C-terminal truncations of DBNL downstream of the coiled-coil domain result in its oligomerization at nanomolar concentrations. In contrast, the ADF-H domain alone is a monomer, which displays a concentration-dependent self-assembly. In vivo FLIM-FRET imaging shows that the presence of only actin-binding domains is not sufficient for DBNL to localize properly at the actin filament inside the cell. In summary, our work provides detailed insight into the structure-function relationship of human drebrin-like protein.
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Affiliation(s)
- Arindam Ghosh
- Third Institute of Physics-Biophysics, Georg August University, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - Jörg Enderlein
- Third Institute of Physics-Biophysics, Georg August University, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - Eugenia Butkevich
- Third Institute of Physics-Biophysics, Georg August University, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
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12
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Multi-omic analysis reveals HIP-55-dependent regulation of cytokines release. Biosci Rep 2020; 40:222299. [PMID: 32134471 PMCID: PMC7087322 DOI: 10.1042/bsr20200298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 02/24/2020] [Accepted: 02/28/2020] [Indexed: 12/16/2022] Open
Abstract
HIP-55 (HPK1 [hematopoietic progenitor kinase 1] -interacting protein of 55 kDa) contains an actin-depolymerizing factor homology (ADF-H) domain at the N-terminus and a src homology 3 (SH3) domain at the C-terminus, which plays an important role in the T cell receptor (TCR) and B-cell receptor (BCR) signaling and immune system. In our previous studies, HIP-55 was found to be highly expressed in several types of tumors and function as a novel oncogenic signaling hub that regulates tumor progression and metastasis through defined functional domains, actin-binding and SH3 modules. However, the wider functions and mechanisms of HIP-55 are still unclear. Here, multi-omic analysis revealed that one of the main biofunctions of HIP-55 is the regulation of cytokines release. Furthermore, to investigate the role of HIP-55 in the cytokine production, a series Cytokine Antibody Arrays were performed to detect differentially expressed cytokines between control and HIP-55 knockdown cells. A total of 97 differentially expressed cytokines were identified from 300 cytokines in A549 cell. Bioinformatics analysis showed these differentially cytokines were mainly enriched in cancer signal pathways and IL-6 is the most critical hub in the integrated network. Analysis of RNAseq data from lung cancer patients showed that there is a strong negative correlation between HIP-55 and interleukin-6 (IL-6) in samples from lung adenocarcinoma patients. Our data indicated that HIP-55 may participate in cancer progression and metastasis via regulating cytokines release.
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13
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Pournia F, Dang-Lawson M, Choi K, Mo V, Lampe PD, Matsuuchi L. Identification of serine residues in the connexin43 carboxyl tail important for BCR-mediated spreading of B-lymphocytes. J Cell Sci 2020; 133:jcs237925. [PMID: 31964709 PMCID: PMC10682646 DOI: 10.1242/jcs.237925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 12/20/2019] [Indexed: 11/20/2022] Open
Abstract
B-lymphocytes recognize antigen via B-cell antigen receptors (BCRs). This binding induces signaling, leading to B-cell activation, proliferation and differentiation. Early events of BCR signaling include reorganization of actin and membrane spreading, which facilitates increased antigen gathering. We have previously shown that the gap junction protein connexin43 (Cx43; also known as GJA1) is phosphorylated upon BCR signaling, and its carboxyl tail (CT) is important for BCR-mediated spreading. Here, specific serine residues in the Cx43 CT that are phosphorylated following BCR stimulation were identified. A chimeric protein containing the extracellular and transmembrane domains of CD8 fused to the Cx43 CT was sufficient to support cell spreading. Cx43 CT truncations showed that the region between amino acids 246-307 is necessary for B-cell spreading. Site-specific serine-to-alanine mutations (S255A, S262A, S279A and S282A) resulted in differential effects on both BCR signaling and BCR-mediated spreading. These serine residues can serve as potential binding sites for actin remodeling mediators and/or BCR signaling effectors; therefore, our results may reflect unique roles for each of these serines in terms of linking the Cx43 CT to actin remodeling.
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Affiliation(s)
- Farnaz Pournia
- Cell and Developmental Biology Graduate Program, Life Sciences Institute, University of British Columbia (UBC), 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
- Department of Zoology, Life Sciences Institute, University of British Columbia (UBC), 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - May Dang-Lawson
- Department of Zoology, Life Sciences Institute, University of British Columbia (UBC), 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia (UBC), 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Kate Choi
- Cell and Developmental Biology Graduate Program, Life Sciences Institute, University of British Columbia (UBC), 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
- Department of Zoology, Life Sciences Institute, University of British Columbia (UBC), 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia (UBC), 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Victor Mo
- Cell and Developmental Biology Graduate Program, Life Sciences Institute, University of British Columbia (UBC), 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
- Department of Zoology, Life Sciences Institute, University of British Columbia (UBC), 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Paul D Lampe
- Translational Research Program, Public Health Sciences and Human Biology Divisions, Fred Hutchinson Cancer Research Center, 1100 Fairview Ave. N, Seattle, WA 98109-1024, USA
| | - Linda Matsuuchi
- Cell and Developmental Biology Graduate Program, Life Sciences Institute, University of British Columbia (UBC), 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
- Department of Zoology, Life Sciences Institute, University of British Columbia (UBC), 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
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14
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Batcha MM, Ahamed AS, Peng CF. Identification of a new type of haematopoietic progenitor kinase-interacting protein (HIP-55) in Aedes aegypti mosquito haemocytes and its involvement in immunity-like functions in mosquito: a molecular study. Parasitol Res 2019; 118:2509-2521. [PMID: 31377908 DOI: 10.1007/s00436-019-06408-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 07/25/2019] [Indexed: 11/26/2022]
Abstract
In this study, we characterize the HIP-55 protein in the mosquito Aedes aegypti for the first time. HIP-55 is a 55-kDa HPK1-interacting protein that is also called SH3P7. HIP-55 constitutively binds HPK1 'via' an HPK1 proline-rich motif 2(PR2) through its C-terminal SH3 domain. HIP-55 critically interacts with ZAP-70, and this interaction was induced by TCR signalling. ZAP-70 phosphorylated HIP-55 at Tyr-334 and Tyr-344 in vitro and in vivo. In our previous findings, AaZAP gene expression strongly proved that AaZAP-70 was involved in immunity-like functions in mosquito. Northern blot analysis of HIP-55 mRNA expression confirmed that it is only expressed in the abdomen and haemocyte tissues; this prediction correlates 100% and a polyclonal antibody also confirmed its localization in haemocytes and the abdomen. We prepared extracts to show the cytoplasmic expression (CE) of this protein. Previous results had proven that this protein is secreted from the cytoplasm; thus, we confirmed here that the protein is a cytoplasmic adaptor protein in mosquitoes and mammalian systems. Furthermore, our polyclonal antibody against HIP-55 also demonstrated that this protein is found in haemocytes and abdomen tissues, which assumes that the protein may be involved in phagocytic-like functions. RNAi (siRNA) silencing studies were used to degrade mosquito HIP-55; however, silencing only slightly affected the HIP-55 sequence and the gene transcriptional level. To characterize this protein, we cloned 609 bp from the 1.6-kb full-length cDNA using a pET28 vector for polyclonal antibody production. Graphical abstract.
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Affiliation(s)
- M Mohiadeen Batcha
- Department of Zoology, HKRH College, Uthamapalayam, Theni District, Tamil Nadu, India.
- Post Doctoral Scientist, Institute of Tropical Medicine, National Yang Ming University, Shihpai, Taipei-112, Taiwan, Republic of China.
| | - A Sajith Ahamed
- Department of Microbiology, HKRH College, Uthamapalayam, Theni District, Tamil Nadu, India
| | - Chiung Fang Peng
- Fuga Biotechnology, Chongqing S. Rd, Zhongzheng Dist, Taipei - 100, Taiwan
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15
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Wang L, Yan Z, He X, Zhang C, Yu H, Lu Q. A 5-gene prognostic nomogram predicting survival probability of glioblastoma patients. Brain Behav 2019; 9:e01258. [PMID: 30859746 PMCID: PMC6456771 DOI: 10.1002/brb3.1258] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 12/07/2018] [Accepted: 02/13/2019] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Glioblastoma (GBM) remains the most biologically aggressive subtype of gliomas with an average survival of 10 to 12 months. Considering that the overall survival (OS) of each GBM patient is a key factor in the treatment of individuals, it is meaningful to predict the survival probability for GBM patients newly diagnosed in clinical practice. MATERIAL AND METHODS Using the TCGA dataset and two independent GEO datasets, we identified genes that are associated with the OS and differentially expressed between GBM tissues and the adjacent normal tissues. A robust likelihood-based survival modeling approach was applied to select the best genes for modeling. After the prognostic nomogram was generated, an independent dataset on different platform was used to evaluate its effectiveness. RESULTS We identified 168 differentially expressed genes associated with the OS. Five of these genes were selected to generate a gene prognostic nomogram. The external validation demonstrated that 5-gene prognostic nomogram has the capability of predicting the OS of GBM patients. CONCLUSION We developed a novel and convenient prognostic tool based on five genes that exhibited clinical value in predicting the survival probability for newly diagnosed GBM patients, and all of these five genes could represent potential target genes for the treatment of GBM. The development of this model will provide a good reference for cancer researchers.
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Affiliation(s)
- Lingchen Wang
- Department of Biostatistics and Epidemiology, School of Public Health, Nanchang University, Nanchang, China.,Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, P.R. China
| | - Zhengwei Yan
- Center for Experimental Medicine, The First Affiliated Hospital of Nanchang University, Jiangxi, China
| | - Xiaona He
- Department of Biostatistics and Epidemiology, School of Public Health, Nanchang University, Nanchang, China.,Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, P.R. China
| | - Cheng Zhang
- Center for Experimental Medicine, The First Affiliated Hospital of Nanchang University, Jiangxi, China
| | - Huiqiang Yu
- Department of Biostatistics and Epidemiology, School of Public Health, Nanchang University, Nanchang, China.,Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, P.R. China
| | - Quqin Lu
- Department of Biostatistics and Epidemiology, School of Public Health, Nanchang University, Nanchang, China.,Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, P.R. China
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16
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Ubaida-Mohien C, Gonzalez-Freire M, Lyashkov A, Moaddel R, Chia CW, Simonsick EM, Sen R, Ferrucci L. Physical Activity Associated Proteomics of Skeletal Muscle: Being Physically Active in Daily Life May Protect Skeletal Muscle From Aging. Front Physiol 2019; 10:312. [PMID: 30971946 PMCID: PMC6443906 DOI: 10.3389/fphys.2019.00312] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 03/07/2019] [Indexed: 01/18/2023] Open
Abstract
Muscle strength declines with aging and increasing physical activity is the only intervention known to attenuate this decline. In order to adequately investigate both preventive and therapeutic interventions against sarcopenia, a better understanding of the biological changes that are induced by physical activity in skeletal muscle is required. To determine the effect of physical activity on the skeletal muscle proteome, we utilized liquid-chromatography mass spectrometry to obtain quantitative proteomics data on human skeletal muscle biopsies from 60 well-characterized healthy individuals (20-87 years) who reported heterogeneous levels of physical activity (not active, active, moderately active, and highly active). Over 4,000 proteins were quantified, and higher self-reported physical activity was associated with substantial overrepresentation of proteins associated with mitochondria, TCA cycle, structural and contractile muscle, and genome maintenance. Conversely, proteins related to the spliceosome, transcription regulation, immune function, and apoptosis, DNA damage, and senescence were underrepresented with higher self-reported activity. These differences in observed protein expression were related to different levels of physical activity in daily life and not intense competitive exercise. In most instances, differences in protein levels were directly opposite to those reported in the literature observed with aging. These data suggest that being physically active in daily life has strong and biologically detectable beneficial effects on muscle.
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Affiliation(s)
- Ceereena Ubaida-Mohien
- Intramural Research Program, National Institute on Aging - National Institutes of Health, Baltimore, MD, United States
| | - Marta Gonzalez-Freire
- Intramural Research Program, National Institute on Aging - National Institutes of Health, Baltimore, MD, United States
| | - Alexey Lyashkov
- Intramural Research Program, National Institute on Aging - National Institutes of Health, Baltimore, MD, United States
| | - Ruin Moaddel
- Intramural Research Program, National Institute on Aging - National Institutes of Health, Baltimore, MD, United States
| | - Chee W Chia
- Intramural Research Program, National Institute on Aging - National Institutes of Health, Baltimore, MD, United States
| | - Eleanor M Simonsick
- Intramural Research Program, National Institute on Aging - National Institutes of Health, Baltimore, MD, United States
| | - Ranjan Sen
- Intramural Research Program, National Institute on Aging - National Institutes of Health, Baltimore, MD, United States
| | - Luigi Ferrucci
- Intramural Research Program, National Institute on Aging - National Institutes of Health, Baltimore, MD, United States
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17
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Li J, Yin W, Jing Y, Kang D, Yang L, Cheng J, Yu Z, Peng Z, Li X, Wen Y, Sun X, Ren B, Liu C. The Coordination Between B Cell Receptor Signaling and the Actin Cytoskeleton During B Cell Activation. Front Immunol 2019; 9:3096. [PMID: 30687315 PMCID: PMC6333714 DOI: 10.3389/fimmu.2018.03096] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Accepted: 12/13/2018] [Indexed: 01/27/2023] Open
Abstract
B-cell activation plays a crucial part in the immune system and is initiated via interaction between the B cell receptor (BCR) and specific antigens. In recent years with the help of modern imaging techniques, it was found that the cortical actin cytoskeleton changes dramatically during B-cell activation. In this review, we discuss how actin-cytoskeleton reorganization regulates BCR signaling in different stages of B-cell activation, specifically when stimulated by antigens, and also how this reorganization is mediated by BCR signaling molecules. Abnormal BCR signaling is associated with the progression of lymphoma and immunological diseases including autoimmune disorders, and recent studies have proved that impaired actin cytoskeleton can devastate the normal activation of B cells. Therefore, to figure out the coordination between the actin cytoskeleton and BCR signaling may reveal an underlying mechanism of B-cell activation, which has potential for new treatments for B-cell associated diseases.
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Affiliation(s)
- Jingwen Li
- Department of Microbiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Yin
- Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yukai Jing
- Department of Microbiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Danqing Kang
- Department of Microbiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lu Yang
- Department of Microbiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jiali Cheng
- Department of Microbiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ze Yu
- Department of Microbiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zican Peng
- Department of Microbiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xingbo Li
- Department of Microbiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yue Wen
- Department of Microbiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xizi Sun
- Department of Microbiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Boxu Ren
- Department of Immunology, School of Medicine, Yangtze University, Jingzhou, China
- Clinical Molecular Immunology Center, School of Medicine, Yangtze University, Jingzhou, China
| | - Chaohong Liu
- Department of Microbiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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18
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Gaud G, Roncagalli R, Chaoui K, Bernard I, Familiades J, Colacios C, Kassem S, Monsarrat B, Burlet-Schiltz O, de Peredo AG, Malissen B, Saoudi A. The costimulatory molecule CD226 signals through VAV1 to amplify TCR signals and promote IL-17 production by CD4 + T cells. Sci Signal 2018; 11:11/538/eaar3083. [PMID: 29991650 DOI: 10.1126/scisignal.aar3083] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The activation of T cells requires the guanine nucleotide exchange factor VAV1. Using mice in which a tag for affinity purification was attached to endogenous VAV1 molecules, we analyzed by quantitative mass spectrometry the signaling complex that assembles around activated VAV1. Fifty VAV1-binding partners were identified, most of which had not been previously reported to participate in VAV1 signaling. Among these was CD226, a costimulatory molecule of immune cells. Engagement of CD226 induced the tyrosine phosphorylation of VAV1 and synergized with T cell receptor (TCR) signals to specifically enhance the production of interleukin-17 (IL-17) by primary human CD4+ T cells. Moreover, co-engagement of the TCR and a risk variant of CD226 that is associated with autoimmunity (rs763361) further enhanced VAV1 activation and IL-17 production. Thus, our study reveals that a VAV1-based, synergistic cross-talk exists between the TCR and CD226 during both physiological and pathological T cell responses and provides a rational basis for targeting CD226 for the management of autoimmune diseases.
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Affiliation(s)
- Guillaume Gaud
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, CNRS, Inserm, Toulouse 31300, France
| | - Romain Roncagalli
- Centre d'Immunologie de Marseille-Luminy, Aix-Marseille Université, Inserm, CNRS, 13288 Marseille, France
| | - Karima Chaoui
- Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, CNRS UMR 5089, 31077 Toulouse Cedex, France
| | - Isabelle Bernard
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, CNRS, Inserm, Toulouse 31300, France
| | - Julien Familiades
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, CNRS, Inserm, Toulouse 31300, France
| | - Céline Colacios
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, CNRS, Inserm, Toulouse 31300, France
| | - Sahar Kassem
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, CNRS, Inserm, Toulouse 31300, France
| | - Bernard Monsarrat
- Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, CNRS UMR 5089, 31077 Toulouse Cedex, France
| | - Odile Burlet-Schiltz
- Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, CNRS UMR 5089, 31077 Toulouse Cedex, France
| | - Anne Gonzalez de Peredo
- Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, CNRS UMR 5089, 31077 Toulouse Cedex, France
| | - Bernard Malissen
- Centre d'Immunologie de Marseille-Luminy, Aix-Marseille Université, Inserm, CNRS, 13288 Marseille, France.,Centre d'Immunophénomique, Aix-Marseille Université, Inserm, CNRS, 13288 Marseille, France
| | - Abdelhadi Saoudi
- Centre de Physiopathologie de Toulouse Purpan, Université de Toulouse, CNRS, Inserm, Toulouse 31300, France.
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19
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Honkova K, Rossnerova A, Pavlikova J, Svecova V, Klema J, Topinka J, Milcova A, Libalova H, Choi H, Veleminsky M, Sram RJ, Rossner P. Gene expression profiling in healthy newborns from diverse localities of the Czech Republic. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2018; 59:401-415. [PMID: 29602183 DOI: 10.1002/em.22184] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 02/19/2018] [Accepted: 02/23/2018] [Indexed: 06/08/2023]
Abstract
Prenatal exposure to air pollution is associated with intrauterine growth restriction and low birth weight. Gene expression changes in newborns in relation to air pollution have not been sufficiently studied. We analyzed whole genome expression in cord blood leukocytes of 202 newborns from diverse localities of the Czech Republic, differing among other factors in levels of air pollution: the district of Karvina (characterized by higher concentration of air pollutants) and Ceske Budejovice (lower air pollution levels). We aimed to identify differentially expressed genes (DEGs) and pathways in relation to locality and concentration of air pollutants. We applied the linear model to identify the specific DEGs and the correlation analysis, to investigate the relationship between the concentrations of air pollutants and gene expression data. An analysis of biochemical pathways and gene set enrichment was also performed. In general, we observed modest changes of gene expression, mostly attributed to the effect of the locality. The highest number of DEGs was found in samples from the district of Karvina. A pathway analysis revealed a deregulation of processes associated with cell growth, apoptosis or cellular homeostasis, immune response-related processes or oxidative stress response. The association between concentrations of air pollutants and gene expression changes was weak, particularly for samples collected in Karvina. In summary, as we did not find a direct effect of exposure to air pollutants, we assume that the general differences in the environment, rather than actual concentrations of individual pollutants, represent a key factor affecting gene expression changes at delivery. Environ. Mol. Mutagen. 59:401-415, 2018. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Katerina Honkova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Andrea Rossnerova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jitka Pavlikova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Vlasta Svecova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jiri Klema
- Czech Technical University, Prague, Czech Republic
| | - Jan Topinka
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Alena Milcova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Helena Libalova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Hyunok Choi
- School of Public Health, University at Albany, Rensselaer, New York
| | - Milos Veleminsky
- Faculty of Health and Social Studies, University of South Bohemia, Ceske Budejovice, Czech Republic
| | - Radim J Sram
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Pavel Rossner
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
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20
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Zhang Q, Ding S, Zhang H. Interactions between hematopoietic progenitor kinase 1 and its adaptor proteins. Mol Med Rep 2017; 16:6472-6482. [DOI: 10.3892/mmr.2017.7494] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 07/31/2017] [Indexed: 11/06/2022] Open
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21
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van Ham M, Teich R, Philipsen L, Niemz J, Amsberg N, Wissing J, Nimtz M, Gröbe L, Kliche S, Thiel N, Klawonn F, Hubo M, Jonuleit H, Reichardt P, Müller AJ, Huehn J, Jänsch L. TCR signalling network organization at the immunological synapses of murine regulatory T cells. Eur J Immunol 2017; 47:2043-2058. [DOI: 10.1002/eji.201747041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 06/28/2017] [Accepted: 08/14/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Marco van Ham
- Cellular Proteomics; Helmholtz Centre for Infection Research; Braunschweig Germany
| | - René Teich
- Experimental Immunology; Helmholtz Centre for Infection Research; Braunschweig Germany
| | - Lars Philipsen
- Institute of Molecular and Clinical Immunology; Otto-von-Guericke University; Magdeburg Germany
| | - Jana Niemz
- Experimental Immunology; Helmholtz Centre for Infection Research; Braunschweig Germany
| | - Nicole Amsberg
- Cellular Proteomics; Helmholtz Centre for Infection Research; Braunschweig Germany
| | - Josef Wissing
- Cellular Proteomics; Helmholtz Centre for Infection Research; Braunschweig Germany
| | - Manfred Nimtz
- Cellular Proteomics; Helmholtz Centre for Infection Research; Braunschweig Germany
| | - Lothar Gröbe
- Experimental Immunology; Helmholtz Centre for Infection Research; Braunschweig Germany
| | - Stefanie Kliche
- Institute of Molecular and Clinical Immunology; Otto-von-Guericke University; Magdeburg Germany
| | - Nadine Thiel
- Experimental Immunology; Helmholtz Centre for Infection Research; Braunschweig Germany
| | - Frank Klawonn
- Cellular Proteomics; Helmholtz Centre for Infection Research; Braunschweig Germany
- Department of Computer Science; Ostfalia University of Applied Sciences; Wolfenbuettel Germany
| | - Mario Hubo
- Department of Dermatology; Johannes Gutenberg-University Mainz; Mainz Germany
| | - Helmut Jonuleit
- Department of Dermatology; Johannes Gutenberg-University Mainz; Mainz Germany
| | - Peter Reichardt
- Institute of Molecular and Clinical Immunology; Otto-von-Guericke University; Magdeburg Germany
| | - Andreas J. Müller
- Institute of Molecular and Clinical Immunology; Otto-von-Guericke University; Magdeburg Germany
- Intravital Microscopy of Infection and Immunity; Helmholtz Centre for Infection Research; Braunschweig Germany
| | - Jochen Huehn
- Experimental Immunology; Helmholtz Centre for Infection Research; Braunschweig Germany
| | - Lothar Jänsch
- Cellular Proteomics; Helmholtz Centre for Infection Research; Braunschweig Germany
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Role of Drebrin at the Immunological Synapse. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1006:271-280. [PMID: 28865025 DOI: 10.1007/978-4-431-56550-5_15] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Although drebrin was first described in neurons, it is also expressed in cells of the immune system, such as T lymphocytes and mast cells. Another member of the drebrin family of proteins, mammalian actin-binding protein 1 (mAbp-1) is more widely expressed and plays important roles in the function of macrophages, polymorphonuclear neutrophils, and B lymphocytes. We will briefly discuss on the function of mAbp-1 and drebrin in immune cells with emphasis on T cells. Specifically, drebrin enables the immune responses of CD4+ T lymphocytes. T cells are activated after the recognition of an antigen presented by antigen-presenting cells through cognate cell-cell contacts called immunological synapses (IS). In CD4+ T cells, drebrin associates with the chemokine receptor CXCR4, and both molecules redistribute to the IS displaying similar dynamics. Through its interaction with CXCR4 and the actin cytoskeleton, drebrin regulates T cell activation. CD4+ T cells are one of the main targets for the human immunodeficiency virus (HIV)-1. This virus utilizes the IS structure to be transmitted to uninfected cells, forming cell-cell contacts called virological synapses (VS). Interestingly, drebrin negatively regulates HIV-1 infection of CD4+ T lymphocytes, by regulating actin polymerization at the VS.
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Cofilin-1 and Other ADF/Cofilin Superfamily Members in Human Malignant Cells. Int J Mol Sci 2016; 18:ijms18010010. [PMID: 28025492 PMCID: PMC5297645 DOI: 10.3390/ijms18010010] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 11/18/2016] [Accepted: 12/01/2016] [Indexed: 12/12/2022] Open
Abstract
Identification of actin-depolymerizing factor homology (ADF-H) domains in the structures of several related proteins led first to the formation of the ADF/cofilin family, which then expanded to the ADF/cofilin superfamily. This superfamily includes the well-studied cofilin-1 (Cfl-1) and about a dozen different human proteins that interact directly or indirectly with the actin cytoskeleton, provide its remodeling, and alter cell motility. According to some data, Cfl-1 is contained in various human malignant cells (HMCs) and is involved in the formation of malignant properties, including invasiveness, metastatic potential, and resistance to chemotherapeutic drugs. The presence of other ADF/cofilin superfamily proteins in HMCs and their involvement in the regulation of cell motility were discovered with the use of various OMICS technologies. In our review, we discuss the results of the study of Cfl-1 and other ADF/cofilin superfamily proteins, which may be of interest for solving different problems of molecular oncology, as well as for the prospects of further investigations of these proteins in HMCs.
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Drebrin-like protein DBN-1 is a sarcomere component that stabilizes actin filaments during muscle contraction. Nat Commun 2015; 6:7523. [PMID: 26146072 DOI: 10.1038/ncomms8523] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 05/16/2015] [Indexed: 01/22/2023] Open
Abstract
Actin filament organization and stability in the sarcomeres of muscle cells are critical for force generation. Here we identify and functionally characterize a Caenorhabditis elegans drebrin-like protein DBN-1 as a novel constituent of the muscle contraction machinery. In vitro, DBN-1 exhibits actin filament binding and bundling activity. In vivo, DBN-1 is expressed in body wall muscles of C. elegans. During the muscle contraction cycle, DBN-1 alternates location between myosin- and actin-rich regions of the sarcomere. In contracted muscle, DBN-1 is accumulated at I-bands where it likely regulates proper spacing of α-actinin and tropomyosin and protects actin filaments from the interaction with ADF/cofilin. DBN-1 loss of function results in the partial depolymerization of F-actin during muscle contraction. Taken together, our data show that DBN-1 organizes the muscle contractile apparatus maintaining the spatial relationship between actin-binding proteins such as α-actinin, tropomyosin and ADF/cofilin and possibly strengthening actin filaments by bundling.
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Actin-binding protein 1 links B-cell antigen receptors to negative signaling pathways. Proc Natl Acad Sci U S A 2014; 111:9881-6. [PMID: 24958882 DOI: 10.1073/pnas.1321971111] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Prolonged or uncontrolled B-cell receptor (BCR) signaling is associated with autoimmunity. We previously demonstrated a role for actin in BCR signal attenuation. This study reveals that actin-binding protein 1 (Abp1/HIP-55/SH3P7) is a negative regulator of BCR signaling and links actin to negative regulatory pathways of the BCR. In both Abp1(-/-) and bone marrow chimeric mice, in which only B cells lack Abp1 expression, the number of spontaneous germinal center and marginal zone B cells and the level of autoantibody are significantly increased. Serum levels of T-independent antibody responses and total antibody are elevated, whereas T-dependent antibody responses are markedly reduced and fail to undergo affinity maturation. Upon activation, surface BCR clustering is enhanced and B-cell contraction delayed in Abp1(-/-) B cells, concurrent with slow but persistent increases in F-actin at BCR signalosomes. Furthermore, BCR signaling is enhanced in Abp1(-/-) B cells compared with wild-type B cells, including Ca(2+) flux and phosphorylation of B-cell linker protein, the mitogen-activated protein kinase kinase MEK1/2, and ERK, coinciding with reductions in recruitment of the inhibitory signaling molecules hematopoietic progenitor kinase 1 and SH2-containing inositol 5-phosphatase to BCR signalosomes. Our results indicate that Abp1 negatively regulates BCR signaling by coupling actin remodeling to B-cell contraction and activation of inhibitory signaling molecules, which contributes to the regulation of peripheral B-cell development and antibody responses.
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Song W, Liu C, Seeley-Fallen MK, Miller H, Ketchum C, Upadhyaya A. Actin-mediated feedback loops in B-cell receptor signaling. Immunol Rev 2014; 256:177-89. [PMID: 24117821 DOI: 10.1111/imr.12113] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Upon recognizing cognate antigen, B cells mobilize multiple cellular apparatuses to propagate an optimal response. Antigen binding is transduced into cytoplasmic signaling events through B-cell antigen receptor (BCR)-based signalosomes at the B-cell surface. BCR signalosomes are dynamic and transient and are subsequently endocytosed for antigen processing. The function of BCR signalosomes is one of the determining factors for the fate of B cells: clonal expansion, anergy, or apoptosis. Accumulating evidence underscores the importance of the actin cytoskeleton in B-cell activation. We have begun to appreciate the role of actin dynamics in regulating BCR-mediated tonic signaling and the formation of BCR signalosomes. Our recent studies reveal an additional function of the actin cytoskeleton in the downregulation of BCR signaling, consequently contributing to the generation and maintenance of B-cell self-tolerance. In this review, we discuss how actin remodels its organization and dynamics in close coordination with BCR signaling and how actin remodeling in turn amplifies the activation and subsequent downregulation process of BCR signaling, providing vital feedback for optimal BCR activation.
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Affiliation(s)
- Wenxia Song
- Department of Cell Biology & Molecular Genetics, University of Maryland, College Park, MD, USA
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27
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Chung S, Suzuki H, Miyamoto T, Takamatsu N, Tatsuguchi A, Ueda K, Kijima K, Nakamura Y, Matsuo Y. Development of an orally-administrative MELK-targeting inhibitor that suppresses the growth of various types of human cancer. Oncotarget 2013; 3:1629-40. [PMID: 23283305 PMCID: PMC3681500 DOI: 10.18632/oncotarget.790] [Citation(s) in RCA: 122] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
We previously reported MELK (maternal embryonic leucine zipper kinase) as a novel therapeutic target for breast cancer. MELK was also reported to be highly upregulated in multiple types of human cancer. It was implied to play indispensable roles in cancer cell survival and indicated its involvement in the maintenance of tumor-initiating cells. We conducted a high-throughput screening of a compound library followed by structure-activity relationship studies, and successfully obtained a highly potent MELK inhibitor OTSSP167 with IC50 of 0.41 nM. OTSSP167 inhibited the phosphorylation of PSMA1 (proteasome subunit alpha type 1) and DBNL (drebrin-like), which we identified as novel MELK substrates and are important for stem-cell characteristics and invasiveness. The compound suppressed mammosphere formation of breast cancer cells and exhibited significant tumor growth suppression in xenograft studies using breast, lung, prostate, and pancreas cancer cell lines in mice by both intravenous and oral administration. This MELK inhibitor should be a promising compound possibly to suppress the growth of tumor-initiating cells and be applied for treatment of a wide range of human cancer.
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Affiliation(s)
- Suyoun Chung
- Department of Medicine and Surgery, The University of Chicago, Chicago, IL, USA
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Hematopoietic progenitor kinase 1 (HPK1) is required for LFA-1–mediated neutrophil recruitment during the acute inflammatory response. Blood 2013; 121:4184-94. [DOI: 10.1182/blood-2012-08-451385] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Key Points
Hematopoietic progenitor kinase 1 (HPK1) regulates LFA-1 affinity and thereby controls adhesion and postadhesion functions of neutrophils. Hematopoietic progenitor kinase 1 (HPK1) is critically involved in neutrophil trafficking during acute inflammation.
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Chung S, Nakamura Y. MELK inhibitor, novel molecular targeted therapeutics for human cancer stem cells. Cell Cycle 2013; 12:1655-6. [PMID: 23673321 DOI: 10.4161/cc.24988] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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Rovira-Clavé X, Angulo-Ibáñez M, Noguer O, Espel E, Reina M. Syndecan-2 can promote clearance of T-cell receptor/CD3 from the cell surface. Immunology 2012; 137:214-25. [PMID: 22881146 DOI: 10.1111/j.1365-2567.2012.03626.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
T cells express the heparan sulphate proteoglycans syndecan-2 and syndecan-4. Syndecan-4 plays a T-cell inhibitory role; however, the function of syndecan-2 is unknown. In an attempt to examine this function, syndecan-2 was expressed constitutively in Jurkat T cells. Interestingly, the expression of syndecan-2 decreased the surface levels of T-cell receptor (TCR)/CD3 complex, concomitant with intracellular retention of CD3ε and partial degradation of the TCR-ζ chain. Immunofluorescence microscopy revealed that intracellular CD3ε co-located with Rab-4 endosomes. However, the intracellular pool of CD3ε did not recycle to the cell surface. The lower TCR/CD3 surface levels caused by syndecan-2 led to reduced TCR/CD3 responsiveness. We show that the cytosolic PDZ-binding domain of syndecan-2 is not necessary to elicit TCR/CD3 down-regulation. These results identify a previously unrecognized means of controlling surface TCR/CD3 expression by syndecan-2.
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Affiliation(s)
- Xavier Rovira-Clavé
- Departament de Biologia Cellular, Universitat de Barcelona, Barcelona, Spain
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Reichenberger EJ, Levine MA, Olsen BR, Papadaki ME, Lietman SA. The role of SH3BP2 in the pathophysiology of cherubism. Orphanet J Rare Dis 2012; 7 Suppl 1:S5. [PMID: 22640988 PMCID: PMC3359958 DOI: 10.1186/1750-1172-7-s1-s5] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Cherubism is a rare bone dysplasia that is characterized by symmetrical bone resorption limited to the jaws. Bone lesions are filled with soft fibrous giant cell-rich tissue that can expand and cause severe facial deformity. The disorder typically begins in children at ages of 2-5 years and the bone resorption and facial swelling continues until puberty; in most cases the lesions regress spontaneously thereafter. Most patients with cherubism have germline mutations in the gene encoding SH3BP2, an adapter protein involved in adaptive and innate immune response signaling. A mouse model carrying a Pro416Arg mutation in SH3BP2 develops osteopenia and expansile lytic lesions in bone and some soft tissue organs. In this review we discuss the genetics of cherubism, the biological functions of SH3BP2 and the analysis of the mouse model. The data suggest that the underlying cause for cherubism is a systemic autoinflammatory response to physiologic challenges despite the localized appearance of bone resorption and fibrous expansion to the jaws in humans.
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Affiliation(s)
- Ernst J Reichenberger
- Department of Reconstructive Sciences, Center for Regenerative Medicine and Skeletal Development, University of Connecticut Health Center, Farmington, CT, USA.
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Ruperez P, Gago-Martinez A, Burlingame AL, Oses-Prieto JA. Quantitative phosphoproteomic analysis reveals a role for serine and threonine kinases in the cytoskeletal reorganization in early T cell receptor activation in human primary T cells. Mol Cell Proteomics 2012; 11:171-86. [PMID: 22499768 DOI: 10.1074/mcp.m112.017863] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Protein phosphorylation-dephosphorylation events play a primary role in regulation of almost all aspects of cell function including signal transduction, cell cycle, or apoptosis. Thus far, T cell phosphoproteomics have focused on analysis of phosphotyrosine residues, and little is known about the role of serine/threonine phosphorylation in early activation of the T cell receptor (TCR). Therefore, we performed a quantitative mass spectrometry-based analysis of the global phosphoproteome of human primary T cells in response to 5 min of TCR activation with anti-CD3 antibody. Combining immunoprecipitation with an antiphosphotyrosine antibody, titanium dioxide phosphopeptide enrichment, isobaric tag for the relative and absolute quantitation methodology, and strong cation exchange separation, we were able to identify 2814 phosphopeptides. These unique sites were employed to investigate the site-specific phosphorylation dynamics. Five hundred and seventeen phosphorylation sites showed TCR-responsive changes. We found that upon 5 min of stimulation of the TCR, specific serine and threonine kinase motifs are overrepresented in the set of responsive phosphorylation sites. These phosphorylation events targeted proteins with many different activities and are present in different subcellular locations. Many of these proteins are involved in intracellular signaling cascades related mainly to cytoskeletal reorganization and regulation of small GTPase-mediated signal transduction, probably involved in the formation of the immune synapse.
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Affiliation(s)
- Patricia Ruperez
- Department of Pharmaceutical Chemistry, Mass Spectrometry Facility, School of Pharmacy, University of California San Francisco, San Francisco, California 94158, USA
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Collado-Romero M, Martins RP, Arce C, Moreno Á, Lucena C, Carvajal A, Garrido JJ. An in vivo proteomic study of the interaction between Salmonella Typhimurium and porcine ileum mucosa. J Proteomics 2012; 75:2015-26. [DOI: 10.1016/j.jprot.2012.01.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 12/08/2011] [Accepted: 01/01/2012] [Indexed: 11/29/2022]
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Boateng LR, Cortesio CL, Huttenlocher A. Src-mediated phosphorylation of mammalian Abp1 (DBNL) regulates podosome rosette formation in transformed fibroblasts. J Cell Sci 2012; 125:1329-41. [PMID: 22303001 DOI: 10.1242/jcs.096529] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Podosomes are dynamic actin-based structures that mediate adhesion to the extracellular matrix and localize matrix degradation to facilitate cell motility and invasion. Drebrin-like protein (DBNL), which is homologous to yeast mAbp1 and is therefore known as mammalian actin-binding protein 1 (mAbp1), has been implicated in receptor-mediated endocytosis, vesicle recycling and dorsal ruffle formation. However, it is not known whether mAbp1 regulates podosome formation or cell invasion. In this study, we found that mAbp1 localizes to podosomes and is necessary for the formation of podosome rosettes in Src-transformed fibroblasts. Despite their structural similarity, mAbp1 and cortactin play distinct roles in podosome regulation. Cortactin was necessary for the formation of podosome dots, whereas mAbp1 was necessary for the formation of organized podosome rosettes in Src-transformed cells. We identified specific Src phosphorylation sites, Tyr337 and Tyr347 of mAbp1, which mediate the formation of podosome rosettes and degradation of the ECM. In contrast to dorsal ruffles, the interaction of mAbp1 with WASP-interacting protein (WIP) was not necessary for the formation of podosome rosettes. Finally, we showed that depletion of mAbp1 increased invasive cell migration, suggesting that mAbp1 differentially regulates matrix degradation and cell invasion. Collectively, our findings identify a role for mAbp1 in podosome rosette formation and cell invasion downstream of Src.
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Affiliation(s)
- Lindsy R Boateng
- Program in Cellular and Molecular Biology, University of Wisconsin, Madison, WI 53706, USA
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Poukkula M, Kremneva E, Serlachius M, Lappalainen P. Actin-depolymerizing factor homology domain: a conserved fold performing diverse roles in cytoskeletal dynamics. Cytoskeleton (Hoboken) 2011; 68:471-90. [PMID: 21850706 DOI: 10.1002/cm.20530] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2011] [Revised: 06/29/2011] [Accepted: 08/05/2011] [Indexed: 11/09/2022]
Abstract
Actin filaments form contractile and protrusive structures that play central roles in many processes such as cell migration, morphogenesis, endocytosis, and cytokinesis. During these processes, the dynamics of the actin filaments are precisely regulated by a large array of actin-binding proteins. The actin-depolymerizing factor homology (ADF-H) domain is a structurally conserved protein motif, which promotes cytoskeletal dynamics by interacting with monomeric and/or filamentous actin, and with the Arp2/3 complex. Despite their structural homology, the five classes of ADF-H domain proteins display distinct biochemical activities and cellular roles, only parts of which are currently understood. ADF/cofilin promotes disassembly of aged actin filaments, whereas twinfilin inhibits actin filament assembly via sequestering actin monomers and interacting with filament barbed ends. GMF does not interact with actin, but instead binds Arp2/3 complex and promotes dissociation of Arp2/3-mediated filament branches. Abp1 and drebrin are multidomain proteins that interact with actin filaments and regulate the activities of other proteins during various actin-dependent processes. The exact function of coactosin is currently incompletely understood. In this review article, we discuss the biochemical functions, cellular roles, and regulation of the five groups of ADF-H domain proteins.
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Affiliation(s)
- Minna Poukkula
- Program in Cell and Molecular Biology, Institute of Biotechnology, University of Helsinki, Finland
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The mammalian actin-binding protein 1 (mAbp1): a novel molecular player in leukocyte biology. Trends Cell Biol 2011; 21:247-55. [DOI: 10.1016/j.tcb.2010.12.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 11/21/2010] [Accepted: 12/02/2010] [Indexed: 11/18/2022]
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Patzak IM, Königsberger S, Suzuki A, Mak TW, Kiefer F. HPK1 competes with ADAP for SLP-76 binding and via Rap1 negatively affects T-cell adhesion. Eur J Immunol 2010; 40:3220-5. [DOI: 10.1002/eji.201040313] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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38
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Lettau M, Pieper J, Gerneth A, Lengl-Janssen B, Voss M, Linkermann A, Schmidt H, Gelhaus C, Leippe M, Kabelitz D, Janssen O. The adapter protein Nck: role of individual SH3 and SH2 binding modules for protein interactions in T lymphocytes. Protein Sci 2010; 19:658-69. [PMID: 20082308 DOI: 10.1002/pro.334] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Nck is a ubiquitously expressed, primarily cytosolic adapter protein consisting of one SH2 domain and three SH3 domains. It links receptor and nonreceptor tyrosine kinases to actin cytoskeleton reorganizing proteins. In T lymphocytes, Nck is a crucial component of signaling pathways for T cell activation and effector function. It recruits actin remodeling proteins to T cell receptor (TCR)-associated activation clusters and thereby initiates changes in cell polarity and morphology. Moreover, Nck is crucial for the TCR-induced mobilization of secretory vesicles to the cytotoxic immunological synapse. To identify the interactome of Nck in human T cells, we performed a systematic screen for interaction partners in untreated or pervanadate-treated cells. We used GST fusion proteins containing full length Nck, the combined SH3 domains or the individual SH3 and SH2 domains to precipitate putative Nck interactors from cellular lysates. Protein bands were excised from gels, processed by tryptic in-gel digestion and analyzed by mass spectrometry. Using this approach, we confirmed previously established interactions (e.g., with Slp76, CD3 epsilon, WASP, and WIPF1) and identified several novel putative Nck-binding proteins. We subsequently verified the SH2 domain binding to the actin-binding protein HIP55 and to FYB/ADAP, and the SH3-mediated binding to the nuclear proteins SFPQ/NONO. Using laser scanning microscopy, we provide new evidence for a nuclear localization of Nck in human T cells. Our data highlight the fundamental role of Nck in the TCR-to-cytoskeleton crosstalk and point to yet unknown nuclear functions of Nck also in T lymphocytes.
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Affiliation(s)
- Marcus Lettau
- Molecular Immunology, Institute for Immunology, Christian-Albrechts University, D-24105 Kiel, Germany.
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Königsberger S, Peckl-Schmid D, Zaborsky N, Patzak I, Kiefer F, Achatz G. HPK1 associates with SKAP-HOM to negatively regulate Rap1-mediated B-lymphocyte adhesion. PLoS One 2010; 5. [PMID: 20824186 PMCID: PMC2931690 DOI: 10.1371/journal.pone.0012468] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Accepted: 08/06/2010] [Indexed: 11/18/2022] Open
Abstract
Background Hematopoietic progenitor kinase 1 (HPK1) is a Ste20-related serine/threonine kinase activated by a range of environmental stimuli including genotoxic stress, growth factors, inflammatory cytokines and antigen receptor triggering. Being inducibly recruited to membrane-proximal signalling scaffolds to regulate NFAT, AP-1 and NFκB-mediated gene transcription in T-cells, the function of HPK1 in B-cells to date remains rather ill-defined. Methodology/Principal Findings By using two loss of function models, we show that HPK1 displays a novel function in regulating B-cell integrin activity. Wehi 231 lymphoma cells lacking HPK1 after shRNA mediated knockdown exhibit increased basic activation levels of Ras-related protein 1 (Rap1), accompanied by a severe lymphocyte function-associated antigen-1 (LFA-1) dependent homotypic aggregation and increased adhesion to intercellular adhesion molecule 1 (ICAM-1). The observed phenotype of enhanced integrin activity is caused downstream of Src, by a signalling module independent of PI3K and PLC, involving HPK1, SKAP55 homologue (SKAP-HOM) and Rap1-GTP-interacting adaptor molecule (RIAM). This alters actin dynamics and renders focal adhesion kinase (FAK) constitutively phosphorylated. Bone marrow and splenic B-cell development of HPK1−/− mice are largely unaffected, except age-related tendencies for increased splenic cellularity and BCR downregulation. In addition, naïve splenic knockout B-cells appear hyperresponsive to a range of stimuli applied ex vivo as recently demonstrated by others for T-cells. Conclusions/Significance We therefore conclude that HPK1 exhibits a dual function in B-cells by negatively regulating integrin activity and controlling cellular activation, which makes it an interesting candidate to study in pathological settings like autoimmunity and cancer.
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Affiliation(s)
| | - Doris Peckl-Schmid
- Department of Molecular Biology, University of Salzburg, Salzburg, Austria,
| | - Nadja Zaborsky
- Department of Molecular Biology, University of Salzburg, Salzburg, Austria,
| | - Irene Patzak
- Lincoln's Inn Fields Laboratories, Cancer Research UK London Research Institute, London, United Kingdom,
| | - Friedemann Kiefer
- Department Vascular Cell Biology, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Gernot Achatz
- Department of Molecular Biology, University of Salzburg, Salzburg, Austria,
- * E-mail:
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Skelton TS, Tejpal N, Gong Y, Kloc M, Ghobrial RM. Downregulation of RhoA and changes in T cell cytoskeleton correlate with the abrogation of allograft rejection. Transpl Immunol 2010; 23:185-93. [PMID: 20619345 DOI: 10.1016/j.trim.2010.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Revised: 06/15/2010] [Accepted: 06/16/2010] [Indexed: 12/15/2022]
Abstract
Proper actin cytoskeleton architecture and dynamics are indispensable for events in the immunological response such as T cell migration, redistribution of T cell receptors, and interaction with antigen presenting cells. Thus, T cell activation, downstream signaling events and effector functions are all actin-dependent. Actin cytoskeleton architecture and dynamics are regulated by proteins belonging to the superfamily of small GTP-binding proteins, such as RhoA GTPase. We previously showed that the administration of an MHC class I allochimeric molecule [alpha1h1/u]-RT1.Aa, which contains donor-type (Wistar Furth, WF; RT1u) immunogenic epitopes displayed on recipient-type (ACI, RT1a) sequences, to the ACI recipient of heterotopic WF heart resulted in the restriction of the TCR repertoire, inhibition of T cell infiltration into the heterotopic cardiac allografts, abrogation of acute and chronic rejection, and induction of indefinite survival of the allograft. Here we show that the allochimeric molecule treatment caused downregulation of RhoA GTPase in T cells. This resulted in dramatic changes in the distribution of actin and the actin-binding protein, Hip55, in these cells, which in turn, inhibited T cell infiltration into the graft. This indicates that the immunosuppressive activity of the allochimeric molecule is achieved via downregulation of the RhoA pathway and disruption of the proper organization of T cell actin cytoskeleton to inhibit T cell functions such as motility and/or TCR signaling events.
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Affiliation(s)
- T Spencer Skelton
- Department of Surgery, The Methodist Hospital and The Methodist Hospital Research Institute, Houston TX, USA
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41
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Pérez-Martínez M, Gordón-Alonso M, Cabrero JR, Barrero-Villar M, Rey M, Mittelbrunn M, Lamana A, Morlino G, Calabia C, Yamazaki H, Shirao T, Vázquez J, González-Amaro R, Veiga E, Sánchez-Madrid F. F-actin-binding protein drebrin regulates CXCR4 recruitment to the immune synapse. J Cell Sci 2010; 123:1160-70. [DOI: 10.1242/jcs.064238] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The adaptive immune response depends on the interaction of T cells and antigen-presenting cells at the immune synapse. Formation of the immune synapse and the subsequent T-cell activation are highly dependent on the actin cytoskeleton. In this work, we describe that T cells express drebrin, a neuronal actin-binding protein. Drebrin colocalizes with the chemokine receptor CXCR4 and F-actin at the peripheral supramolecular activation cluster in the immune synapse. Drebrin interacts with the cytoplasmic tail of CXCR4 and both proteins redistribute to the immune synapse with similar kinetics. Drebrin knockdown in T cells impairs the redistribution of CXCR4 and inhibits actin polymerization at the immune synapse as well as IL-2 production. Our data indicate that drebrin exerts an unexpected and relevant functional role in T cells during the generation of the immune response.
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Affiliation(s)
- Manuel Pérez-Martínez
- Servicio de Inmunología, Hospital Universitario de la Princesa, Diego de León, 62, 28006, Madrid, Spain
| | - Mónica Gordón-Alonso
- Servicio de Inmunología, Hospital Universitario de la Princesa, Diego de León, 62, 28006, Madrid, Spain
- Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, 28029, Spain
| | - José Román Cabrero
- Servicio de Inmunología, Hospital Universitario de la Princesa, Diego de León, 62, 28006, Madrid, Spain
| | - Marta Barrero-Villar
- Servicio de Inmunología, Hospital Universitario de la Princesa, Diego de León, 62, 28006, Madrid, Spain
| | - Mercedes Rey
- Servicio de Inmunología, Hospital Universitario de la Princesa, Diego de León, 62, 28006, Madrid, Spain
| | - María Mittelbrunn
- Servicio de Inmunología, Hospital Universitario de la Princesa, Diego de León, 62, 28006, Madrid, Spain
| | - Amalia Lamana
- Servicio de Inmunología, Hospital Universitario de la Princesa, Diego de León, 62, 28006, Madrid, Spain
| | - Giulia Morlino
- Servicio de Inmunología, Hospital Universitario de la Princesa, Diego de León, 62, 28006, Madrid, Spain
| | - Carmen Calabia
- Servicio de Inmunología, Hospital Universitario de la Princesa, Diego de León, 62, 28006, Madrid, Spain
| | - Hiroyuki Yamazaki
- Department of Neurobiology and Behavior, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Tomoaki Shirao
- Department of Neurobiology and Behavior, Gunma University Graduate School of Medicine, Maebashi, 371-8511, Japan
| | - Jesús Vázquez
- Centro de Biología Molecular Severo Ochoa, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | | | - Esteban Veiga
- Servicio de Inmunología, Hospital Universitario de la Princesa, Diego de León, 62, 28006, Madrid, Spain
- Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, 28029, Spain
| | - Francisco Sánchez-Madrid
- Servicio de Inmunología, Hospital Universitario de la Princesa, Diego de León, 62, 28006, Madrid, Spain
- Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, 28029, Spain
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42
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Lee JS, Lee JE, Oh YM, Park JB, Choi H, Choi CY, Kim IH, Lee SH, Choi K. Recruitment of Sprouty1 to immune synapse regulates T cell receptor signaling. THE JOURNAL OF IMMUNOLOGY 2009; 183:7178-86. [PMID: 19915061 DOI: 10.4049/jimmunol.0803799] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
TCR stimulation not only initiates positive signals for T cell activation, but also induces negative signals that down-regulate T cells. We previously reported that Sprouty1, a negative regulator of Ras-MAPK pathway of receptor tyrosine kinases, was induced by TCR signal and inhibited TCR signaling in CD4+ T cell clones. In this study, we addressed the mechanism underlying Sprouty1 inhibition of T cells. When overexpressed in Jurkat T cells, Sprouty1 inhibited TCR signal-induced IL-2 transcription, and also AP-1, NFAT, and NF-kappaB activation, which suggests that Sprouty1 acts at proximal TCR signalosome. Accordingly, we found that Sprouty1 translocated to immune synapse upon TCR engagement in both Jurkat cells and activated primary T cells and interacted with various signaling molecules in the TCR signalosome, such as linker for activation of T cells (LAT), phospholipase C-gamma1 (PLC-gamma1), c-Cbl/Cbl-b, and HPK1. Sprouty1 inhibited LAT phosphorylation, leading to decreased MAPK activation and IL-2 production. Deletion of C-terminal 54 amino acids in Sprouty1 abolished its inhibitory effect and this deletion mutant was unable to translocate to immune synapse and interact with LAT. Overall, our data suggest that Sprouty1 induced by TCR signal negatively regulates further TCR signaling by interacting with proximal signaling molecules in immune synapse, providing a novel regulatory mechanism of T cells.
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Affiliation(s)
- Jun Sung Lee
- Specific Organs Cancer Branch Research Institute National Cancer Center, Gyeonggi-do, Korea
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43
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Cortesio CL, Perrin BJ, Bennin DA, Huttenlocher A. Actin-binding protein-1 interacts with WASp-interacting protein to regulate growth factor-induced dorsal ruffle formation. Mol Biol Cell 2009; 21:186-97. [PMID: 19910490 PMCID: PMC2801713 DOI: 10.1091/mbc.e09-02-0106] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The authors show that the mammalian actin binding protein-1 (mAbp1) is required for PDGF-induced dorsal ruffle formation. mAbp1 interacts directly with WASp Interacting Protein (WIP) through its SH3 domain, and this interaction is important for regulating dorsal ruffle formation. Growth factor stimulation induces the formation of dynamic actin structures known as dorsal ruffles. Mammalian actin-binding protein-1 (mAbp1) is an actin-binding protein that has been implicated in regulating clathrin-mediated endocytosis; however, a role for mAbp1 in regulating the dynamics of growth factor–induced actin-based structures has not been defined. Here we show that mAbp1 localizes to dorsal ruffles and is necessary for platelet-derived growth factor (PDGF)-mediated dorsal ruffle formation. Despite their structural similarity, we find that mAbp1 and cortactin have nonredundant functions in the regulation of dorsal ruffle formation. mAbp1, like cortactin, is a calpain 2 substrate and the preferred cleavage site occurs between the actin-binding domain and the proline-rich region, generating a C-terminal mAbp1 fragment that inhibits dorsal ruffle formation. Furthermore, mAbp1 directly interacts with the actin regulatory protein WASp-interacting protein (WIP) through its SH3 domain. Finally, we demonstrate that the interaction between mAbp1 and WIP is important in regulating dorsal ruffle formation and that WIP-mediated effects on dorsal ruffle formation require mAbp1. Taken together, these findings identify a novel role for mAbp1 in growth factor–induced dorsal ruffle formation through its interaction with WIP.
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Affiliation(s)
- Christa L Cortesio
- Department of Biomolecular Chemistry, University of Wisconsin, Madison, WI 53706, USA
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44
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Alzabin S, Pyarajan S, Yee H, Kiefer F, Suzuki A, Burakoff S, Sawasdikosol S. Hematopoietic progenitor kinase 1 is a critical component of prostaglandin E2-mediated suppression of the anti-tumor immune response. Cancer Immunol Immunother 2009; 59:419-29. [PMID: 19787351 PMCID: PMC2798028 DOI: 10.1007/s00262-009-0761-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Accepted: 08/21/2009] [Indexed: 12/21/2022]
Abstract
Lung cancer is the leading cause of cancer-related mortality in the world, resulting in over a million deaths each year. Non-small cell lung cancers (NSCLCs) are characterized by a poor immunogenic response, which may be the result of immunosuppressive factors such as prostaglandin E2 (PGE2) present in the tumor environment. The effect of PGE2 in the suppression of anti-tumor immunity and its promotion of tumor survival has been established for over three decades, but with limited mechanistic understanding. We have previously reported that PGE2 activates hematopoietic progenitor kinase 1 (HPK1), a hematopoietic-specific kinase known to negatively regulate T-cell receptor signaling. Here, we report that mice genetically lacking HPK1 resist the growth of PGE2-producing Lewis lung carcinoma (LLC). The presence of tumor-infiltrating lymphocytes (TILs) and T-cell transfer into T cell-deficient mice revealed that tumor rejection is T cell mediated. Further analysis demonstrated that this may be significantly due to the ability of HPK1−/− T cells to withstand PGE2-mediated suppression of T-cell proliferation, IL-2 production, and apoptosis. We conclude that PGE2 utilizes HPK1 to suppress T cell-mediated anti-tumor responses.
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Affiliation(s)
- Saba Alzabin
- NYU Cancer Institute, Department of Medicine, New York University School of Medicine, New York, 10016, USA
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45
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A fundamental role of mAbp1 in neutrophils: impact on beta(2) integrin-mediated phagocytosis and adhesion in vivo. Blood 2009; 114:4209-20. [PMID: 19638624 DOI: 10.1182/blood-2009-02-206169] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The mammalian actin-binding protein 1 (mAbp1, Hip-55, SH3P7) is phosphorylated by the nonreceptor tyrosine kinase Syk that has a fundamental effect for several beta(2) integrin (CD11/CD18)-mediated neutrophil functions. Live cell imaging showed a dynamic enrichment of enhanced green fluorescence protein-tagged mAbp1 at the phagocytic cup of neutrophil-like differentiated HL-60 cells during beta(2) integrin-mediated phagocytosis of serum-opsonized Escherichia coli. The genetic absence of Syk or its pharmacologic inhibition using piceatannol abrogated the proper localization of mAbp1 at the phagocytic cup. The genetic absence or down-regulation of mAbp1 using the RNA interference technique significantly compromised beta(2) integrin-mediated phagocytosis of serum-opsonized E coli or Salmonella typhimurium in vitro as well as clearance of S typhimurium infection in vivo. Moreover, the genetic absence of mAbp1 almost completely abrogated firm neutrophil adhesion under physiologic shear stress conditions in vitro as well as leukocyte adhesion and extravasation in inflamed cremaster muscle venules of mice treated with tumor-necrosis factor alpha. Functional analysis showed that the down-regulation of mAbp1 diminished the number of beta(2) integrin clusters in the high-affinity conformation under flow conditions. These unanticipated results define mAbp1 as a novel molecular player in integrin biology that is critical for phagocytosis and firm neutrophil adhesion under flow conditions.
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46
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Alzabin S, Bhardwaj N, Kiefer F, Sawasdikosol S, Burakoff S. Hematopoietic Progenitor Kinase 1 Is a Negative Regulator of Dendritic Cell Activation. THE JOURNAL OF IMMUNOLOGY 2009; 182:6187-94. [DOI: 10.4049/jimmunol.0802631] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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47
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Acuto O, Di Bartolo V, Michel F. Tailoring T-cell receptor signals by proximal negative feedback mechanisms. Nat Rev Immunol 2009; 8:699-712. [PMID: 18728635 DOI: 10.1038/nri2397] [Citation(s) in RCA: 190] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The T-cell receptor (TCR) signalling machinery is central in determining the response of a T cell (establishing immunity or tolerance) following exposure to antigen. This process is made difficult by the narrow margin of self and non-self discrimination, and by the complexity of the genetic programmes that are induced for each outcome. Recent studies have identified novel negative feedback mechanisms that are rapidly induced by TCR engagement and that have key roles in the regulation of signal triggering and propagation. In vitro and in vivo data suggest that they are important in determining ligand discrimination by the TCR and in regulating signal output in response to antigen.
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Affiliation(s)
- Oreste Acuto
- Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, UK.
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48
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Yoon HK, Sohn KC, Lee JS, Kim YJ, Bhak J, Yang JM, You KH, Kim CD, Lee JH. Prediction and evaluation of protein–protein interaction in keratinocyte differentiation. Biochem Biophys Res Commun 2008; 377:662-667. [DOI: 10.1016/j.bbrc.2008.10.051] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2008] [Accepted: 10/10/2008] [Indexed: 11/29/2022]
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49
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The actin-binding protein Abp1 controls dendritic spine morphology and is important for spine head and synapse formation. J Neurosci 2008; 28:10031-44. [PMID: 18829961 DOI: 10.1523/jneurosci.0336-08.2008] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Polymerization and organization of actin into complex superstructures, including those found in dendritic spines, is indispensable for structure and function of neuronal networks. Here we show that the filamentous actin (F-actin)-binding protein 1 (Abp1), which controls Arp2/3 complex-mediated actin nucleation and binds to postsynaptic scaffold proteins of the ProSAP (proline-rich synapse-associated protein 1)/Shank family, has a profound impact on synaptic organization. Overexpression of the two Abp1 F-actin-binding domains increases the length of thin, filopodia-like and mushroom-type spines but dramatically reduces mushroom spine density, attributable to lack of the Abp1 Src homology 3 (SH3) domain. In contrast, overexpression of full-length Abp1 increases mushroom spine and synapse density. The SH3 domain alone has a dominant-negative effect on mushroom spines, whereas the density of filopodia and thin, immature spines remains unchanged. This suggests that both actin-binding and SH3 domain interactions are crucial for the role of Abp1 in spine maturation. Indeed, Abp1 knockdown significantly reduces mushroom spine and synapse density. Abp1 hereby works in close conjunction with ProSAP1/Shank2 and ProSAP2/Shank3, because Abp1 effects were suppressed by ProSAP2 RNA interference and the ProSAP/Shank-induced increase of spine head width is further promoted by Abp1 cooverexpression and reduced on Abp1 knockdown. Also, interfering with the formation of functional Abp1-ProSAP protein complexes prevents ProSAP-mediated spine head extension. Spine head extension furthermore depends on local Arp2/3 complex-mediated actin polymerization, which is controlled by Abp1 via the Arp2/3 complex activator N-WASP (neural Wiskott-Aldrich syndrome protein). Abp1 thus plays an important role in the formation and morphology control of synapses by making a required functional connection between postsynaptic density components and postsynaptic actin dynamics.
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50
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Onabajo OO, Seeley MK, Kale A, Qualmann B, Kessels M, Han J, Tan TH, Song W. Actin-binding protein 1 regulates B cell receptor-mediated antigen processing and presentation in response to B cell receptor activation. THE JOURNAL OF IMMUNOLOGY 2008; 180:6685-95. [PMID: 18453588 DOI: 10.4049/jimmunol.180.10.6685] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The BCR serves as both signal transducer and Ag transporter. Binding of Ags to the BCR induces signaling cascades and Ag processing and presentation, two essential cellular events for B cell activation. BCR-initiated signaling increases BCR-mediated Ag-processing efficiency by increasing the rate and specificity of Ag transport. Previous studies showed a critical role for the actin cytoskeleton in these two processes. In this study, we found that actin-binding protein 1 (Abp1/HIP-55/SH3P7) functioned as an actin-binding adaptor protein, coupling BCR signaling and Ag-processing pathways with the actin cytoskeleton. Gene knockout of Abp1 and overexpression of the Src homology 3 domain of Abp1 inhibited BCR-mediated Ag internalization, consequently reducing the rate of Ag transport to processing compartments and the efficiency of BCR-mediated Ag processing and presentation. BCR activation induced tyrosine phosphorylation of Abp1 and translocation of both Abp1 and dynamin 2 from the cytoplasm to plasma membrane, where they colocalized with the BCR and cortical F-actin. Mutations of the two tyrosine phosphorylation sites of Abp1 and depolymerization of the actin cytoskeleton interfered with BCR-induced Abp1 recruitment to the plasma membrane. The inhibitory effect of a dynamin proline-rich domain deletion mutant on the recruitment of Abp1 to the plasma membrane, coimmunoprecipitation of dynamin with Abp1, and coprecipitation of Abp1 with GST fusion of the dyanmin proline-rich domain demonstrate the interaction of Abp1 with dynamin 2. These results demonstrate that the BCR regulates the function of Abp1 by inducing Abp1 phosphorylation and actin cytoskeleton rearrangement, and that Abp1 facilitates BCR-mediated Ag processing by simultaneously interacting with dynamin and the actin cytoskeleton.
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Affiliation(s)
- Olusegun O Onabajo
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD 20742, USA
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