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Laletin V, Bernard PL, Montersino C, Yamanashi Y, Olive D, Castellano R, Guittard G, Nunès JA. DOK1 and DOK2 regulate CD8 T cell signaling and memory formation without affecting tumor cell killing. Sci Rep 2024; 14:15053. [PMID: 38956389 PMCID: PMC11220026 DOI: 10.1038/s41598-024-66075-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 06/26/2024] [Indexed: 07/04/2024] Open
Abstract
Targeting intracellular inhibiting proteins has been revealed to be a promising strategy to improve CD8+ T cell anti-tumor efficacy. Here, we are focusing on intracellular inhibiting proteins specific to TCR signaling: DOK1 and DOK2 expressed in T cells. We hypothesized that depletion of intracellular inhibition checkpoint DOK1 and DOK2 could improve CD8+ T-cell based cancer therapies. To evaluate the role of DOK1 and DOK2 depletion in physiology and effector function of CD8+ T lymphocytes and in cancer progression, we established a transgenic T cell receptor mouse model specific to melanoma antigen hgp100 (pmel-1 TCR Tg) in WT and Dok1/Dok2 DKO (double KO) mice. We showed that both DOK1 and DOK2 depletion in CD8+ T cells after an in vitro pre-stimulation induced a higher percentage of effector memory T cells as well as an up regulation of TCR signaling cascade- induced by CD3 mAbs, including the increased levels of pAKT and pERK, two major phosphoproteins involved in T cell functions. Interestingly, this improved TCR signaling was not observed in naïve CD8+ T cells. Despite this enhanced TCR signaling essentially shown upon stimulation via CD3 mAbs, pre-stimulated Dok1/Dok2 DKO CD8+ T cells did not show any increase in their activation or cytotoxic capacities against melanoma cell line expressing hgp100 in vitro. Altogether we demonstrate here a novel aspect of the negative regulation by DOK1 and DOK2 proteins in CD8+ T cells. Indeed, our results allow us to conclude that DOK1 and DOK2 have an inhibitory role following long term T cell stimulations.
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Affiliation(s)
- Vladimir Laletin
- Centre de Recherche en Cancérologie de Marseille, CRCM, Immunity and Cancer Team, Institut Paoli-Calmettes, Inserm, CNRS, Aix Marseille University, Marseille, France
| | - Pierre-Louis Bernard
- Centre de Recherche en Cancérologie de Marseille, CRCM, Immunity and Cancer Team, Institut Paoli-Calmettes, Inserm, CNRS, Aix Marseille University, Marseille, France
| | - Camille Montersino
- Centre de Recherche en Cancérologie de Marseille, CRCM, TrGET Pre-Clinical Assay Platform, Institut Paoli-Calmettes, Inserm, CNRS, Aix Marseille University, Marseille, France
| | - Yuji Yamanashi
- Division of Genetics, The Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan
| | - Daniel Olive
- Centre de Recherche en Cancérologie de Marseille, CRCM, Immunity and Cancer Team, Institut Paoli-Calmettes, Inserm, CNRS, Aix Marseille University, Marseille, France
| | - Rémy Castellano
- Centre de Recherche en Cancérologie de Marseille, CRCM, TrGET Pre-Clinical Assay Platform, Institut Paoli-Calmettes, Inserm, CNRS, Aix Marseille University, Marseille, France
| | - Geoffrey Guittard
- Centre de Recherche en Cancérologie de Marseille, CRCM, Immunity and Cancer Team, Institut Paoli-Calmettes, Inserm, CNRS, Aix Marseille University, Marseille, France
| | - Jacques A Nunès
- Centre de Recherche en Cancérologie de Marseille, CRCM, Immunity and Cancer Team, Institut Paoli-Calmettes, Inserm, CNRS, Aix Marseille University, Marseille, France.
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Theard PL, Linke AJ, Sealover NE, Daley BR, Yang J, Cox K, Kortum RL. SOS2 modulates the threshold of EGFR signaling to regulate osimertinib efficacy and resistance in lung adenocarcinoma. Mol Oncol 2024; 18:641-661. [PMID: 38073064 PMCID: PMC10920089 DOI: 10.1002/1878-0261.13564] [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: 08/09/2023] [Revised: 10/23/2023] [Accepted: 12/08/2023] [Indexed: 01/02/2024] Open
Abstract
Son of sevenless 1 and 2 (SOS1 and SOS2) are RAS guanine nucleotide exchange factors (RasGEFs) that mediate physiologic and pathologic receptor tyrosine kinase (RTK)-dependent RAS activation. Here, we show that SOS2 modulates the threshold of epidermal growth factor receptor (EGFR) signaling to regulate the efficacy of and resistance to the EGFR tyrosine kinase inhibitor (EGFR-TKI) osimertinib in lung adenocarcinoma (LUAD). SOS2 deletion (SOS2KO ) sensitized EGFR-mutated cells to perturbations in EGFR signaling caused by reduced serum and/or osimertinib treatment to inhibit phosphatidylinositol 3-kinase (PI3K)/AKT pathway activation, oncogenic transformation, and survival. Bypassing RTK reactivation of PI3K/AKT signaling represents a common resistance mechanism to EGFR-TKIs; SOS2KO reduced PI3K/AKT reactivation to limit osimertinib resistance. In a forced HGF/MET-driven bypass model, SOS2KO inhibited hepatocyte growth factor (HGF)-stimulated PI3K signaling to block HGF-driven osimertinib resistance. Using a long-term in situ resistance assay, most osimertinib-resistant cultures exhibited a hybrid epithelial/mesenchymal phenotype associated with reactivated RTK/AKT signaling. In contrast, RTK/AKT-dependent osimertinib resistance was markedly reduced by SOS2 deletion; the few SOS2KO cultures that became osimertinib resistant primarily underwent non-RTK-dependent epithelial-mesenchymal transition (EMT). Since bypassing RTK reactivation and/or tertiary EGFR mutations represent most osimertinib-resistant cancers, these data suggest that targeting proximal RTK signaling, here exemplified by SOS2 deletion, has the potential to delay the development osimertinib resistance and enhance overall clinical responses for patients with EGFR-mutated LUAD.
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Affiliation(s)
- Patricia L. Theard
- Department of Pharmacology and Molecular TherapeuticsUniformed Services University of the Health SciencesBethesdaMDUSA
| | - Amanda J. Linke
- Department of Pharmacology and Molecular TherapeuticsUniformed Services University of the Health SciencesBethesdaMDUSA
| | - Nancy E. Sealover
- Department of Pharmacology and Molecular TherapeuticsUniformed Services University of the Health SciencesBethesdaMDUSA
| | - Brianna R. Daley
- Department of Pharmacology and Molecular TherapeuticsUniformed Services University of the Health SciencesBethesdaMDUSA
| | - Johnny Yang
- Department of Pharmacology and Molecular TherapeuticsUniformed Services University of the Health SciencesBethesdaMDUSA
| | - Katherine Cox
- Department of Pharmacology and Molecular TherapeuticsUniformed Services University of the Health SciencesBethesdaMDUSA
| | - Robert L. Kortum
- Department of Pharmacology and Molecular TherapeuticsUniformed Services University of the Health SciencesBethesdaMDUSA
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3
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Luo G, Wang B, Hou Q, Wu X. Development of Son of Sevenless Homologue 1 (SOS1) Modulators To Treat Cancers by Regulating RAS Signaling. J Med Chem 2023; 66:4324-4341. [PMID: 36987571 DOI: 10.1021/acs.jmedchem.2c01729] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
Son of sevenless homologue 1 (SOS1) protein is universally expressed in cells and plays an important role in the RAS signaling pathway. Specifically, this protein interacts with RAS in response to upstream stimuli to promote guanine nucleotide exchange in RAS and activates the downstream signaling pathways. Thus, targeting SOS1 is a new approach for treating RAS-driven cancers. In this Perspective, we briefly summarize the structural and functional aspects of SOS1 and focus on recent advances in the discovery of activators, inhibitors, and PROTACs that target SOS1. This review aims to provide a timely and updated overview on the strategies for targeting SOS1 in cancer therapy.
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Affiliation(s)
- Guangmei Luo
- Department of Medicinal Chemistry, School of Pharmacy and Institute of Innovative Drug Discovery and Development, China Pharmaceutical University, Nanjing 211198, China
| | - Bingrui Wang
- Department of Medicinal Chemistry, School of Pharmacy and Institute of Innovative Drug Discovery and Development, China Pharmaceutical University, Nanjing 211198, China
| | - Qiangqiang Hou
- Department of Medicinal Chemistry, School of Pharmacy and Institute of Innovative Drug Discovery and Development, China Pharmaceutical University, Nanjing 211198, China
| | - Xiaoxing Wu
- Department of Medicinal Chemistry, School of Pharmacy and Institute of Innovative Drug Discovery and Development, China Pharmaceutical University, Nanjing 211198, China
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4
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Ruminski K, Celis-Gutierrez J, Jarmuzynski N, Maturin E, Audebert S, Malissen M, Camoin L, Voisinne G, Malissen B, Roncagalli R. Mapping the SLP76 interactome in T cells lacking each of the GRB2-family adaptors reveals molecular plasticity of the TCR signaling pathway. Front Immunol 2023; 14:1139123. [PMID: 37006259 PMCID: PMC10057548 DOI: 10.3389/fimmu.2023.1139123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 03/02/2023] [Indexed: 03/17/2023] Open
Abstract
The propagation and diversification of signals downstream of the T cell receptor (TCR) involve several adaptor proteins that control the assembly of multimolecular signaling complexes (signalosomes). The global characterization of changes in protein-protein interactions (PPI) following genetic perturbations is critical to understand the resulting phenotypes. Here, by combining genome editing techniques in T cells and interactomics studies based on affinity purification coupled to mass spectrometry (AP-MS) analysis, we determined and quantified the molecular reorganization of the SLP76 interactome resulting from the ablation of each of the three GRB2-family adaptors. Our data showed that the absence of GADS or GRB2 induces a major remodeling of the PPI network associated with SLP76 following TCR engagement. Unexpectedly, this PPI network rewiring minimally affects proximal molecular events of the TCR signaling pathway. Nevertheless, during prolonged TCR stimulation, GRB2- and GADS-deficient cells displayed a reduced level of activation and cytokine secretion capacity. Using the canonical SLP76 signalosome, this analysis highlights the plasticity of PPI networks and their reorganization following specific genetic perturbations.
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Affiliation(s)
- Kilian Ruminski
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
| | - Javier Celis-Gutierrez
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
- Centre d’Immunophénomique, Aix Marseille Université, INSERM, CNRS UMR, Marseille, France
| | - Nicolas Jarmuzynski
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
- Centre d’Immunophénomique, Aix Marseille Université, INSERM, CNRS UMR, Marseille, France
| | - Emilie Maturin
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
| | - Stephane Audebert
- Institut Paoli-Calmettes, CRCM, Aix Marseille Université, CNRS, INSERM, Marseille Protóomique, Marseille, France
| | - Marie Malissen
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
- Centre d’Immunophénomique, Aix Marseille Université, INSERM, CNRS UMR, Marseille, France
| | - Luc Camoin
- Institut Paoli-Calmettes, CRCM, Aix Marseille Université, CNRS, INSERM, Marseille Protóomique, Marseille, France
| | - Guillaume Voisinne
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
| | - Bernard Malissen
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
- Centre d’Immunophénomique, Aix Marseille Université, INSERM, CNRS UMR, Marseille, France
- *Correspondence: Romain Roncagalli, ; Bernard Malissen,
| | - Romain Roncagalli
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
- *Correspondence: Romain Roncagalli, ; Bernard Malissen,
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5
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Marjanovic J, Ramirez HA, Jozic I, Stone RC, Wikramanayake TC, Head CR, Abdo Abujamra B, Ojeh N, Kirsner RS, Lev-Tov H, Pastar I, Tomic-Canic M. Dichotomous role of miR193b-3p in diabetic foot ulcers maintains inhibition of healing and suppression of tumor formation. Sci Transl Med 2022; 14:eabg8397. [PMID: 35544594 PMCID: PMC9707408 DOI: 10.1126/scitranslmed.abg8397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Despite the hyperproliferative environment marked by activation of β-catenin and overexpression of c-myc, the epidermis surrounding chronic diabetic foot ulcers (DFUs) is clinically hypertrophic and nonmigratory yet does not undergo malignant transformation. We identified miR193b-3p as a master regulator that contributes to this unique cellular phenotype. We determined that induction of tumor suppressor miR193b-3p is a unique feature of DFUs that is not found in venous leg ulcers, acute wounds, or cutaneous squamous cell carcinoma (SCC). Genomic analyses of DFUs identified suppression of the miR193b-3p target gene network that orchestrates cell motility. Inhibition of migration and wound closure was further confirmed by overexpression of miR193b-3p in human organotypic and murine in vivo wound models, whereas miR193b-3p knockdown accelerated wound reepithelialization in human ex vivo and diabetic murine wounds in vivo. The dominant negative effect of miR193b-3p on keratinocyte migration was maintained in the presence of promigratory miR31-5p and miR15b-5p, which were also overexpressed in DFUs. miR193b-3p mediated antimigratory activity by disrupting stress fiber formation and by decreasing activity of GTPase RhoA. Conversely, miR193b-3p targets that typically participate in malignant transformation were found to be differentially regulated between DFUs and SCC, including the proto-oncogenes KRAS (Kirsten rat sarcoma viral proto-oncogene) and KIT (KIT proto-oncogene). Although miR193b-3p acts as a tumor suppressor contributing to low tumor incidence in DFUs, it also acts as a master inhibitor of cellular migration and epithelialization in DFUs. Thus, miR193b-3p may represent a target for wound healing induction, cancer therapeutics, and diagnostics.
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Affiliation(s)
- Jelena Marjanovic
- Wound Healing and Regenerative Medicine Research Program, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Horacio A Ramirez
- Wound Healing and Regenerative Medicine Research Program, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Ivan Jozic
- Wound Healing and Regenerative Medicine Research Program, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Rivka C Stone
- Wound Healing and Regenerative Medicine Research Program, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Tongyu C Wikramanayake
- Wound Healing and Regenerative Medicine Research Program, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Cheyanne R Head
- Wound Healing and Regenerative Medicine Research Program, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Beatriz Abdo Abujamra
- Wound Healing and Regenerative Medicine Research Program, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Nkemcho Ojeh
- Wound Healing and Regenerative Medicine Research Program, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA.,Faculty of Medical Sciences, The University of the West Indies, Bridgetown BB11000, Barbados
| | - Robert S Kirsner
- Wound Healing and Regenerative Medicine Research Program, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Hadar Lev-Tov
- Wound Healing and Regenerative Medicine Research Program, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Irena Pastar
- Wound Healing and Regenerative Medicine Research Program, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Marjana Tomic-Canic
- Wound Healing and Regenerative Medicine Research Program, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
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6
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Malila Y, Uengwetwanit T, Thanatsang KV, Arayamethakorn S, Srimarut Y, Petracci M, Soglia F, Rungrassamee W, Visessanguan W. Insights Into Transcriptome Profiles Associated With Wooden Breast Myopathy in Broilers Slaughtered at the Age of 6 or 7 Weeks. Front Physiol 2021; 12:691194. [PMID: 34262480 PMCID: PMC8273767 DOI: 10.3389/fphys.2021.691194] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 06/07/2021] [Indexed: 11/18/2022] Open
Abstract
Transcriptomes associated with wooden breast (WB) were characterized in broilers at two different market ages. Breasts (Pectoralis major) were collected, 20-min postmortem, from male Ross 308 broilers slaughtered at 6 and 7 weeks of age. The breasts were classified as "non-WB" or "WB" based on palpation hardness scoring (non-WB = no abnormal hardness, WB = consistently hardened). Total RNA was isolated from 16 samples (n = 3 for 6 week non-WB, n = 3 for 6 week WB; n = 5 for 7 week non-WB, n = 5 for 7 week WB). Transcriptome was profiled using a chicken gene expression microarray with one-color hybridization technique, and compared between non-WB and WB samples of the same age. Among 6 week broilers, 910 transcripts were differentially expressed (DE) (false discovery rate, FDR < 0.05). Pathway analysis underlined metabolisms of glucose and lipids along with gap junctions, tight junction, and focal adhesion (FA) signaling as the top enriched pathways. For the 7 week broilers, 1,195 transcripts were identified (FDR < 0.05) with regulation of actin cytoskeleton, mitogen-activated protein kinase (MAPK) signaling, protein processing in endoplasmic reticulum and FA signaling highlighted as the enriched affected pathways. Absolute transcript levels of eight genes (actinin-1 - ACTN1, integrin-linked kinase - ILK, integrin subunit alpha 8 - ITGA8, integrin subunit beta 5 - ITGB5, protein tyrosine kinase 2 - PTK2, paxillin - PXN, talin 1 - TLN1, and vinculin - VCL) of FA signaling pathway were further elucidated using a droplet digital polymerase chain reaction. The results indicated that, in 6 week broilers, ITGA8 abundance in WB was greater than that of non-WB samples (p < 0.05). Concerning 7 week broilers, greater absolute levels of ACTN1, ILK, ITGA8, and TLN1, accompanied with a reduced ITGB5 were found in WB compared with non-WB (p < 0.05). Transcriptional modification of FA signaling underlined the potential of disrupted cell-cell communication that may incite aberrant molecular events in association with development of WB myopathy.
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Affiliation(s)
- Yuwares Malila
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, Pathum Thani, Thailand
| | - Tanaporn Uengwetwanit
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, Pathum Thani, Thailand
| | - Krittaporn V. Thanatsang
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, Pathum Thani, Thailand
| | - Sopacha Arayamethakorn
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, Pathum Thani, Thailand
| | - Yanee Srimarut
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, Pathum Thani, Thailand
| | - Massimiliano Petracci
- Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, Cesena, Italy
| | - Francesca Soglia
- Department of Agricultural and Food Sciences, Alma Mater Studiorum, University of Bologna, Cesena, Italy
| | - Wanilada Rungrassamee
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, Pathum Thani, Thailand
| | - Wonnop Visessanguan
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, Pathum Thani, Thailand
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Fernández-Medarde A, Santos E. Ras GEF Mouse Models for the Analysis of Ras Biology and Signaling. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2021; 2262:361-395. [PMID: 33977490 DOI: 10.1007/978-1-0716-1190-6_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Animal models have become in recent years a crucial tool to understand the physiological and pathological roles of many cellular proteins. They allow analysis of the functional consequences of [1] complete or partial (time- or organ-limited) removal of specific proteins (knockout animals), [2] the exchange of a wild-type allele for a mutant or truncated version found in human illnesses (knock-in), or [3] the effect of overexpression of a given protein in the whole body or in specific organs (transgenic mice). In this regard, the study of phenotypes in Ras GEF animal models has allowed researchers to find specific functions for otherwise very similar proteins, uncovering their role in physiological contexts such as memory formation, lymphopoiesis, photoreception, or body homeostasis. In addition, mouse models have been used to unveil the functional role of Ras GEFs under pathological conditions, including Noonan syndrome, skin tumorigenesis, inflammatory diseases, diabetes, or ischemia among others. In the following sections, we will describe the methodological approaches employed for Ras GEF animal model analyses, as well as the main discoveries made.
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Affiliation(s)
- Alberto Fernández-Medarde
- Centro de Investigación del Cáncer-Instituto de Biología Molecular y Celular del Cáncer (CSIC-Universidad de Salamanca) and CIBERONC, Salamanca, Spain.
| | - Eugenio Santos
- Centro de Investigación del Cáncer-Instituto de Biología Molecular y Celular del Cáncer (CSIC-Universidad de Salamanca) and CIBERONC, Salamanca, Spain
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8
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Fuentes-Calvo I, Martinez-Salgado C. Sos1 Modulates Extracellular Matrix Synthesis, Proliferation, and Migration in Fibroblasts. Front Physiol 2021; 12:645044. [PMID: 33889087 PMCID: PMC8055938 DOI: 10.3389/fphys.2021.645044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/05/2021] [Indexed: 01/06/2023] Open
Abstract
Non-reversible fibrosis is common in various diseases such as chronic renal failure, liver cirrhosis, chronic pancreatitis, pulmonary fibrosis, rheumatoid arthritis and atherosclerosis. Transforming growth factor beta 1 (TGF-β1) is involved in virtually all types of fibrosis. We previously described the involvement of Ras GTPase isoforms in the regulation of TGF-β1-induced fibrosis. The guanine nucleotide exchange factor Son of Sevenless (Sos) is the main Ras activator, but the role of the ubiquitously expressed Sos1 in the development of fibrosis has not been studied. For this purpose, we isolated and cultured Sos1 knock-out (KO) mouse embryonic fibroblasts, the main extracellular matrix proteins (ECM)-producing cells, and we analyzed ECM synthesis, cell proliferation and migration in the absence of Sos1, as well as the role of the main Sos1-Ras effectors, Erk1/2 and Akt, in these processes. The absence of Sos1 increases collagen I expression (through the PI3K-Akt signaling pathway), total collagen proteins, and slightly increases fibronectin expression; Sos1 regulates fibroblast proliferation through both PI3K-Akt and Raf-Erk pathways, and Sos1-PI3K-Akt signaling regulates fibroblast migration. These study shows that Sos1 regulates ECM synthesis and migration (through Ras-PI3K-Akt) and proliferation (through Ras-PI3K-Akt and Ras-Raf-Erk) in fibroblasts, and describe for the first time the role of the Sos1-Ras signaling axis in the regulation of cellular processes involved in the development of fibrosis.
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Affiliation(s)
- Isabel Fuentes-Calvo
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain
- Translational Research on Renal and Cardiovascular Diseases (TRECARD)-REDINREN (ISCIII), Department of Physiology and Pharmacology, University of Salamanca, Salamanca, Spain
| | - Carlos Martinez-Salgado
- Institute of Biomedical Research of Salamanca (IBSAL), Salamanca, Spain
- Translational Research on Renal and Cardiovascular Diseases (TRECARD)-REDINREN (ISCIII), Department of Physiology and Pharmacology, University of Salamanca, Salamanca, Spain
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9
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Baltanás FC, Zarich N, Rojas-Cabañeros JM, Santos E. SOS GEFs in health and disease. Biochim Biophys Acta Rev Cancer 2020; 1874:188445. [PMID: 33035641 DOI: 10.1016/j.bbcan.2020.188445] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 10/01/2020] [Accepted: 10/01/2020] [Indexed: 12/11/2022]
Abstract
SOS1 and SOS2 are the most universal and widely expressed family of guanine exchange factors (GEFs) capable or activating RAS or RAC1 proteins in metazoan cells. SOS proteins contain a sequence of modular domains that are responsible for different intramolecular and intermolecular interactions modulating mechanisms of self-inhibition, allosteric activation and intracellular homeostasis. Despite their homology, analyses of SOS1/2-KO mice demonstrate functional prevalence of SOS1 over SOS2 in cellular processes including proliferation, migration, inflammation or maintenance of intracellular redox homeostasis, although some functional redundancy cannot be excluded, particularly at the organismal level. Specific SOS1 gain-of-function mutations have been identified in inherited RASopathies and various sporadic human cancers. SOS1 depletion reduces tumorigenesis mediated by RAS or RAC1 in mouse models and is associated with increased intracellular oxidative stress and mitochondrial dysfunction. Since WT RAS is essential for development of RAS-mutant tumors, the SOS GEFs may be considered as relevant biomarkers or therapy targets in RAS-dependent cancers. Inhibitors blocking SOS expression, intrinsic GEF activity, or productive SOS protein-protein interactions with cellular regulators and/or RAS/RAC targets have been recently developed and shown preclinical and clinical effectiveness blocking aberrant RAS signaling in RAS-driven and RTK-driven tumors.
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Affiliation(s)
- Fernando C Baltanás
- Centro de Investigación del Cáncer - IBMCC (CSIC-USAL) and CIBERONC, Universidad de Salamanca, 37007 Salamanca, Spain
| | - Natasha Zarich
- Unidad Funcional de Investigación de Enfermedades Crónicas (UFIEC) and CIBERONC, Instituto de Salud Carlos III, 28220, Majadahonda, Madrid, Spain
| | - Jose M Rojas-Cabañeros
- Unidad Funcional de Investigación de Enfermedades Crónicas (UFIEC) and CIBERONC, Instituto de Salud Carlos III, 28220, Majadahonda, Madrid, Spain
| | - Eugenio Santos
- Centro de Investigación del Cáncer - IBMCC (CSIC-USAL) and CIBERONC, Universidad de Salamanca, 37007 Salamanca, Spain.
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10
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Wang Y, Zhang H, He H, Ai K, Yu W, Xiao X, Qin Y, Zhang L, Xiong H, Zhou G. LRCH1 suppresses migration of CD4 + T cells and refers to disease activity in ulcerative colitis. Int J Med Sci 2020; 17:599-608. [PMID: 32210709 PMCID: PMC7085219 DOI: 10.7150/ijms.39106] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 01/13/2020] [Indexed: 01/05/2023] Open
Abstract
Background: Ulcerative colitis (UC) is a chronically remittent and progressive inflammatory disorder. LRCH1 is reported to be involved in the immune-regulation of several diseases. However, the exact roles of LRCH1 in UC are still obscure. Materials and Methods: LRCH1 expression was analyzed in the inflamed mucosa and peripheral blood mononuclear cells (PBMCs) from patients with UC by quantitative RT-PCR and immunohistochemistry. Peripheral blood CD4+ T cells were transfected with lentivirus-expressing LRCH1 (LV-LRCH1) or LV-sh-LRCH1, and cytokine expression was determined by using flow cytometry, quantitative RT-PCR and ELISA. Transfected CD4+ T cells were harvested to examine the capacity of chemotaxis using Transwell plate. Results: LRCH1 expression was highly decreased in colonic mucosa and PBMCs from patients with A-UC, and negatively correlated with disease activity. Up or down regulation of LRCH1 did not affect the differentiation of CD4+ T cells, and the related cytokines expression. Moreover, LRCH1 inhibited migratory capacity of CD4+ T cells toward CXCL12 by PKCα. Conclusion: LRCH1 plays an important role in the pathogenesis of UC, possibly through modulating the migration of CD4+ T cells. Therefore, targeting LRCH1 might serve as a novel therapeutic approach in the management of UC.
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Affiliation(s)
- Yibo Wang
- Department of Gastroenterology, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Hairong Zhang
- Department of Gastroenterology, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Heng He
- Department of Gastroenterology, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Kuankuan Ai
- Department of Gastroenterology, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Wei Yu
- Department of Gastroenterology, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Xiao Xiao
- Department of Gastroenterology, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Yufen Qin
- Department of Gastroenterology, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Lingming Zhang
- Department of Gastroenterology, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Huabao Xiong
- Institute of Immunology and Molecular Medicine, Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Guangxi Zhou
- Department of Gastroenterology, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, Shandong 272000, P.R. China
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11
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Jun JE, Kulhanek KR, Chen H, Chakraborty A, Roose JP. Alternative ZAP70-p38 signals prime a classical p38 pathway through LAT and SOS to support regulatory T cell differentiation. Sci Signal 2019; 12:12/591/eaao0736. [PMID: 31337738 DOI: 10.1126/scisignal.aao0736] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
T cell receptor (TCR) stimulation activates diverse kinase pathways, which include the mitogen-activated protein kinases (MAPKs) ERK and p38, the phosphoinositide 3-kinases (PI3Ks), and the kinase mTOR. Although TCR stimulation activates the p38 pathway through a "classical" MAPK cascade that is mediated by the adaptor protein LAT, it also stimulates an "alternative" pathway in which p38 is activated by the kinase ZAP70. Here, we used dual-parameter, phosphoflow cytometry and in silico computation to investigate how both classical and alternative p38 pathways contribute to T cell activation. We found that basal ZAP70 activation in resting T cell lines reduced the threshold ("primed") TCR-stimulated activation of the classical p38 pathway. Classical p38 signals were reduced after T cell-specific deletion of the guanine nucleotide exchange factors Sos1 and Sos2, which are essential LAT signalosome components. As a consequence of Sos1/2 deficiency, production of the cytokine IL-2 was impaired, differentiation into regulatory T cells was reduced, and the autoimmune disease EAE was exacerbated in mice. These data suggest that the classical and alternative p38 activation pathways exist to generate immune balance.
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Affiliation(s)
- Jesse E Jun
- Department of Anatomy, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Kayla R Kulhanek
- Department of Anatomy, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Hang Chen
- Departments of Chemical Engineering, Chemistry, and Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Arup Chakraborty
- Departments of Chemical Engineering, Chemistry, and Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Jeroen P Roose
- Department of Anatomy, University of California, San Francisco, San Francisco, CA 94143, USA.
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12
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Dios-Esponera A, Melis N, Subramanian BC, Weigert R, Samelson LE. Pak1 Kinase Promotes Activated T Cell Trafficking by Regulating the Expression of L-Selectin and CCR7. Front Immunol 2019; 10:370. [PMID: 30891040 PMCID: PMC6411651 DOI: 10.3389/fimmu.2019.00370] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 02/13/2019] [Indexed: 01/13/2023] Open
Abstract
Normal function of the adaptive immune system requires trafficking of T cells between the blood and lymphoid organs. Lymphocyte homing to lymph nodes requires that they cross endothelial barriers present in blood vessels and lymphatics. This multi-step process requires a remodeling of the lymphocyte plasma membrane, which is mediated by the dynamic re-arrangement of the actin cytoskeleton. Pak1 plays a central role in cell morphology, adhesion and migration in various cell types. Here we demonstrate that Pak1 is required for activated CD4+ T cell trafficking to lymph nodes. Pak1 deficiency in T cells causes a defect in the transcription of CCR7 and L-selectin, thereby altering lymphocyte trafficking. Additionally, we report an increase in L-selectin shedding in Pak1-deficient T cells, which correlates with a decrease in the recruitment of calmodulin to the cytoplasmic tail of L-selectin during T cell activation. Overall, our findings demonstrate that by regulating the expression of two major lymph node homing molecules, L-selectin and CCR7, Pak1 mediates activated CD4+ T cell trafficking.
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Affiliation(s)
- Ana Dios-Esponera
- Laboratory of Cellular and Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | - Nicolas Melis
- Laboratory of Cellular and Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | - Bhagawat C Subramanian
- Laboratory of Cellular and Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | - Roberto Weigert
- Laboratory of Cellular and Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | - Lawrence E Samelson
- Laboratory of Cellular and Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
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13
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Guittard G, Dios-Esponera A, Palmer DC, Akpan I, Barr VA, Manna A, Restifo NP, Samelson LE. The Cish SH2 domain is essential for PLC-γ1 regulation in TCR stimulated CD8 + T cells. Sci Rep 2018; 8:5336. [PMID: 29593227 PMCID: PMC5871872 DOI: 10.1038/s41598-018-23549-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 03/06/2018] [Indexed: 12/22/2022] Open
Abstract
Cish, participates within a multi-molecular E3 ubiquitin ligase complex, which ubiquitinates target proteins. It has an inhibitory effect on T cell activation mediated by PLC-γ1 regulation, and it functions as a potent checkpoint in CD8+ T cell tumor immunotherapy. To study the structural and functional relationships between Cish and PLC-γ1 during CD8+ T cell activation, we tested mutants of the Cish-SH2 (R107K) and D/BC (L222Q, C226Q) domains. We confirmed that Cish-SH2-specific binding was essential for PLC-γ1 ubiquitination and degradation. This domain was essential for the Cish-mediated inhibition of Ca2+ release upon TCR stimulation. No effect on inhibition of cytokine release was observed with SH2 or D/BC mutants, although the absence of Cish led to an increased release of IFN-γ and TNF-α. Using imaging we showed that Cish was expressed mostly in the cytoplasm and we did not see any Cish clustering at the plasma membrane upon stimulation. We conclude that the Cish-SH2 domain is essential for PLC-γ1 regulation in TCR-stimulated CD8+ T cells.
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Affiliation(s)
- Geoffrey Guittard
- Laboratory of Cellular and Molecular Biology, Center for Cancer Research, NCI, National Institutes of Health, Bethesda, Maryland, 20892-4256, USA. .,INSERM, U1068, CNRS UMR7258, Aix-Marseille Université UM105, Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille, 13009, Marseille, France.
| | - Ana Dios-Esponera
- Laboratory of Cellular and Molecular Biology, Center for Cancer Research, NCI, National Institutes of Health, Bethesda, Maryland, 20892-4256, USA
| | - Douglas C Palmer
- Surgery Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 9000 Rockville Pike, Building 10/CRC, Room 3W-3840, Bethesda, MD, 20892, USA
| | - Itoro Akpan
- Laboratory of Cellular and Molecular Biology, Center for Cancer Research, NCI, National Institutes of Health, Bethesda, Maryland, 20892-4256, USA
| | - Valarie A Barr
- Laboratory of Cellular and Molecular Biology, Center for Cancer Research, NCI, National Institutes of Health, Bethesda, Maryland, 20892-4256, USA
| | - Asit Manna
- Laboratory of Cellular and Molecular Biology, Center for Cancer Research, NCI, National Institutes of Health, Bethesda, Maryland, 20892-4256, USA
| | - Nicholas P Restifo
- Surgery Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 9000 Rockville Pike, Building 10/CRC, Room 3W-3840, Bethesda, MD, 20892, USA
| | - Lawrence E Samelson
- Laboratory of Cellular and Molecular Biology, Center for Cancer Research, NCI, National Institutes of Health, Bethesda, Maryland, 20892-4256, USA.
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14
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Ge S, Xiong Y, Wu X, Xie J, Liu F, He J, Xiang T, Cheng N, Lai L, Zhong Y. Role of growth factor receptor-bound 2 in CCl 4-induced hepatic fibrosis. Biomed Pharmacother 2017; 92:942-951. [PMID: 28618656 DOI: 10.1016/j.biopha.2017.05.142] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 05/19/2017] [Accepted: 05/28/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Growth Factor Receptor-bound 2 (GRB2) plays a crucial role in regulation of cellular function including proliferation and differentiation, and we previously identified GRB2 as promoting HSCs (HSCs) proliferation. However, the underlying mechanisms that are involving in the regulation of GRB2 in hepatic fibrogenesis remain unknown. METHODS In the present study, we tested the function of GRB2 in hepatic fibrosis. Hepatic fibrosis was induced by subcutaneous CCl4 administration at a dose of 3mL/kg in rats. The rat HSC cell line HSC-T6 were cultured for proliferation investigation by CCK-8 and BrdU incorporation method. The levels of GRB2, HMGB1, PI3K/AKT, COL1A1 and α-SMA were analyzed by western blot or real-time PCR. RESULTS showed that the expression of GRB2 and HMGB1 was obviously increased in liver tissues of hepatic fibrosis rats accompanied by up-regulation of COL1A1 and α-SMA. In cultured HSCs, application of exogenous HMGB1 induced cell proliferation and cell proliferation rate concomitantly with up-regulation of GRB2 expression and PI3K/AKT phosphorylation. The effects of HMGB1-induced proliferation of HSCs and up-regulation of COL1A1 and α-SMA were abolished by GRB2 siRNA. HMGB1-induced proliferation of HSCs and up-regulation of COL1A1 and α-SMA was reversed in the presence of LY294002, an inhibitor of PI3K inhibitor. CONCLUSIONS These findings suggest that GRB2 plays an important role in CCl4-induced hepatic fibrosis by regulating HSCs' function, and up-regulation of GRB2 induced by HMGB1 is mediated via the PI3K/AKT pathway.
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Affiliation(s)
- Shanfei Ge
- Department of Infectious Disease, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
| | - Ying Xiong
- Department of Infectious Disease, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
| | - Xiaoping Wu
- Department of Infectious Disease, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
| | - Jianping Xie
- Department of Infectious Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China.
| | - Fei Liu
- Department of Infectious Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China.
| | - Jinni He
- Xiangya School of Medicine, Central South University, Changsha, Hunan, China.
| | - Tianxing Xiang
- Department of Infectious Disease, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
| | - Na Cheng
- Department of Infectious Disease, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
| | - Lingling Lai
- Department of Infectious Disease, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
| | - Yuanbin Zhong
- Department of Infectious Disease, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
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15
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Alles J, Ludwig N, Rheinheimer S, Leidinger P, Grässer FA, Keller A, Meese E. MiR-148a impairs Ras/ERK signaling in B lymphocytes by targeting SOS proteins. Oncotarget 2017; 8:56417-56427. [PMID: 28915601 PMCID: PMC5593572 DOI: 10.18632/oncotarget.17662] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 04/24/2017] [Indexed: 12/12/2022] Open
Abstract
Although microRNAs have been recognized as central cellular regulators, there is an evident lack of knowledge about their targets. Here, we analyzed potential target genes for miR-148a functioning in Ras signaling in B cells, including SOS1 and SOS2. A dual-luciferase reporter assay showed significantly decreased luciferase activity upon ectopic overexpression of miR-148a in HEK-293T cells that were co-transfected with the 3′UTR of either SOS1 or SOS2. Each of the 3′UTRs of SOS1 and SOS2 contained two binding sites for miR-148a both of which were necessary for the decreased luciferase activity. MiR-148a overexpression in HEK-293T lead to significantly reduced levels of both endogenous SOS1 and SOS2 proteins. Likewise, reduced levels of SOS proteins were found in two B cell lines that were transfected with miR-148a. The level of ERK1/2 phosphorylation as one of the most relevant downstream members of the Ras/ERK signaling pathway was also reduced in cells with miR-148a overexpression. The data show that miR-148a impairs the Ras/ERK signaling pathway via SOS1 and SOS2 proteins in B cells.
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Affiliation(s)
- Julia Alles
- Institute of Human Genetics, Saarland University, 66421 Homburg, Germany
| | - Nicole Ludwig
- Institute of Human Genetics, Saarland University, 66421 Homburg, Germany
| | | | - Petra Leidinger
- Institute of Human Genetics, Saarland University, 66421 Homburg, Germany
| | | | - Andreas Keller
- Chair for Clinical Bioinformatics, Saarland University, 66123 Saarbrücken, Germany
| | - Eckart Meese
- Institute of Human Genetics, Saarland University, 66421 Homburg, Germany
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16
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Wehenkel M, Corr M, Guy CS, Edwards BA, Castellaw AH, Calabrese C, Pagès G, Pouysségur J, Vogel P, McGargill MA. Extracellular Signal-Regulated Kinase Signaling in CD4-Expressing Cells Inhibits Osteochondromas. Front Immunol 2017; 8:482. [PMID: 28507546 PMCID: PMC5410564 DOI: 10.3389/fimmu.2017.00482] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 04/07/2017] [Indexed: 11/13/2022] Open
Abstract
Defects in cartilage homeostasis can give rise to various skeletal disorders including osteochondromas. Osteochondromas are benign bone tumors caused by excess accumulation of chondrocytes, the main cell type of cartilage. The extracellular signal-regulated kinase (ERK) pathway is a major signaling node that functions within chondrocytes to regulate their growth and differentiation. However, it is not known whether the ERK pathway in other cell types regulates cartilage homeostasis. We show here that mice with a germline deficiency of Erk1 and a conditional deletion of Erk2 in cells that express CD4, or expressed CD4 at one point in development, unexpectedly developed bone deformities. The bone lesions were due to neoplastic outgrowths of chondrocytes and disordered growth plates, similar to tumors observed in the human disease, osteochondromatosis. Chondrocyte accumulation was not due to deletion of Erk2 in the T cells. Rather, CD4cre was expressed in cell types other than T cells, including a small fraction of chondrocytes. Surprisingly, the removal of T cells accelerated osteochondroma formation and enhanced disease severity. These data show for the first time that T cells impact the growth of osteochondromas and describe a novel model to study cartilage homeostasis and osteochondroma formation.
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Affiliation(s)
- Marie Wehenkel
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Maripat Corr
- Division of Rheumatology, Allergy, and Immunology, University of California San Diego, La Jolla, CA, USA
| | - Clifford S Guy
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Benjamin A Edwards
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Ashley H Castellaw
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Christopher Calabrese
- Department of Veterinary Pathology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Gilles Pagès
- Institute for Research of Cancer and Aging (IRCAN), University of Nice Sophia-Antipolis, Nice, France
| | - Jacques Pouysségur
- Institute for Research of Cancer and Aging (IRCAN), University of Nice Sophia-Antipolis, Nice, France.,Centre Scientifique de Monaco (CSM), Monaco, France
| | - Peter Vogel
- Department of Veterinary Pathology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Maureen A McGargill
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA
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17
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Guittard G, Gallardo DL, Li W, Melis N, Lui JC, Kortum RL, Shakarishvili NG, Huh S, Baron J, Weigert R, Kramer JA, Samelson LE, Sommers CL. Unexpected Cartilage Phenotype in CD4-Cre-Conditional SOS-Deficient Mice. Front Immunol 2017; 8:343. [PMID: 28386265 PMCID: PMC5362643 DOI: 10.3389/fimmu.2017.00343] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 03/10/2017] [Indexed: 12/11/2022] Open
Abstract
RAS signaling is central to many cellular processes and SOS proteins promote RAS activation. To investigate the role of SOS proteins in T cell biology, we crossed Sos1f/fSos2−/− mice to CD4-Cre transgenic mice. We previously reported an effect of these mutations on T cell signaling and T cell migration. Unexpectedly, we observed nodules on the joints of greater than 90% of these mutant mice at 5 months of age, especially on the carpal joints. As the mice aged further, some also displayed joint stiffness, hind limb paralysis, and lameness. Histological analysis indicated that the abnormal growth in joints originated from dysplastic chondrocytes. Second harmonic generation imaging of the carpal nodules revealed that nodules were encased by rich collagen fibrous networks. Nodules formed in mice also deficient in RAG2, indicating that conventional T cells, which undergo rearrangement of the T cell antigen receptor, are not required for this phenotype. CD4-Cre expression in a subset of cells, either immune lineage cells (e.g., non-conventional T cells) or non-immune lineage cells (e.g., chondrocytes) likely mediates the dramatic phenotype observed in this study. Disruptions of genes in the RAS signaling pathway are especially likely to cause this phenotype. These results also serve as a cautionary tale to those intending to use CD4-Cre transgenic mice to specifically delete genes in conventional T cells.
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Affiliation(s)
- Geoffrey Guittard
- Laboratory of Cellular and Molecular Biology, CCR, NCI, NIH , Bethesda, MD , USA
| | - Devorah L Gallardo
- Laboratory Animal Sciences Program, Leidos Biomedical Research, NCI, NIH , Bethesda, MD , USA
| | - Wenmei Li
- Laboratory of Cellular and Molecular Biology, CCR, NCI, NIH , Bethesda, MD , USA
| | - Nicolas Melis
- Laboratory of Cellular and Molecular Biology, CCR, NCI, NIH , Bethesda, MD , USA
| | - Julian C Lui
- Section on Growth and Development, NICHD, NIH , Bethesda, MD , USA
| | - Robert L Kortum
- Department of Pharmacology, Uniformed Services University of the Health Sciences , Bethesda, MD , USA
| | | | - Sunmee Huh
- Laboratory of Cellular and Molecular Biology, CCR, NCI, NIH , Bethesda, MD , USA
| | - Jeffrey Baron
- Section on Growth and Development, NICHD, NIH , Bethesda, MD , USA
| | - Roberto Weigert
- Laboratory of Cellular and Molecular Biology, CCR, NCI, NIH , Bethesda, MD , USA
| | - Joshua A Kramer
- Laboratory Animal Sciences Program, Leidos Biomedical Research, NCI, NIH , Bethesda, MD , USA
| | - Lawrence E Samelson
- Laboratory of Cellular and Molecular Biology, CCR, NCI, NIH , Bethesda, MD , USA
| | - Connie L Sommers
- Laboratory of Cellular and Molecular Biology, CCR, NCI, NIH , Bethesda, MD , USA
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18
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Kim HJ, Kim SY, Kwon JY, Kim YJ, Hun Kang S, Jang WH, Lee JH, Seo MW, Song JJ, Seo YR, Park MK. Identification of Potential Novel Biomarkers and Signaling Pathways Related to Otitis Media Induced by Diesel Exhaust Particles Using Transcriptomic Analysis in an In Vivo System. PLoS One 2016; 11:e0166044. [PMID: 27832168 PMCID: PMC5104406 DOI: 10.1371/journal.pone.0166044] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 10/09/2016] [Indexed: 01/04/2023] Open
Abstract
INTRODUCTION Air pollutants are associated with inflammatory diseases such as otitis media (OM). Significantly higher incidence rates of OM are reported in regions with air pollution. Diesel exhaust particles (DEPs) comprise a major class of contaminants among numerous air pollutants, and they are characterized by a carbonic mixture of polycyclic aromatic hydrocarbons (PAHs), nitro-PAHs, and small amounts of sulfate, nitrate, metals and other trace elements. DEP exposure is a risk factor for inflammatory diseases. Our previous study identified potential biomarkers using gene expression microarray and pathway analyses in an in vitro system. Although in vitro investigations have been conducted to elucidate plausible biomarkers and molecular mechanisms related to DEP exposure, in vivo studies are necessary to identify the exact biological relevance regarding the incidence of OM caused by DEP exposure. In this study, we identified potential molecular biomarkers and pathways triggered by DEP exposure in a rodent model. METHODS Transcriptomic analysis was employed to identify novel potential biomarkers in the middle ear of DEP-exposed mice. RESULTS A total of 697 genes were differentially expressed in the DEP-exposed mice; 424 genes were upregulated and 273 downregulated. In addition, signaling pathways among the differentially expressed genes mediated by DEP exposure were predicted. Several key molecular biomarkers were identified including cholinergic receptor muscarinic 1 (CHRM1), erythropoietin (EPO), son of sevenless homolog 1 (SOS1), estrogen receptor 1 (ESR1), cluster of differentiation 4 (CD4) and interferon alpha-1 (IFNA1). CONCLUSIONS Our results shed light on the related cell processes and gene signaling pathways affected by DEP exposure. The identified biomarkers might be potential candidates for determining early diagnoses and effective treatment strategies for DEP-mediated disorders.
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Affiliation(s)
- Hyo Jeong Kim
- Department of Life Science, Dongguk University Biomedi Campus, 32, Dongguk-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do, 410–820, South Korea
- Institute of Environmental Medicine, Dongguk University, Seoul, South Korea
| | - So Young Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Bundang CHA Medical Center, CHA University, Seongnam, South Korea
| | - Jee Young Kwon
- Department of Life Science, Dongguk University Biomedi Campus, 32, Dongguk-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do, 410–820, South Korea
- Institute of Environmental Medicine, Dongguk University, Seoul, South Korea
| | - Yeo Jin Kim
- Department of Life Science, Dongguk University Biomedi Campus, 32, Dongguk-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do, 410–820, South Korea
- Institute of Environmental Medicine, Dongguk University, Seoul, South Korea
| | - Seung Hun Kang
- Department of Life Science, Dongguk University Biomedi Campus, 32, Dongguk-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do, 410–820, South Korea
- Institute of Environmental Medicine, Dongguk University, Seoul, South Korea
| | - Won-Hee Jang
- Department of Life Science, Dongguk University Biomedi Campus, 32, Dongguk-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do, 410–820, South Korea
- Institute of Environmental Medicine, Dongguk University, Seoul, South Korea
| | - Jun Ho Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul, South Korea
| | - Myung-Whan Seo
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul, South Korea
| | - Jae-Jun Song
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, South Korea
| | - Young Rok Seo
- Department of Life Science, Dongguk University Biomedi Campus, 32, Dongguk-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do, 410–820, South Korea
- Institute of Environmental Medicine, Dongguk University, Seoul, South Korea
- * E-mail: (MKP); (YRS)
| | - Moo Kyun Park
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul, South Korea
- * E-mail: (MKP); (YRS)
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19
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Sos1 disruption impairs cellular proliferation and viability through an increase in mitochondrial oxidative stress in primary MEFs. Oncogene 2016; 35:6389-6402. [PMID: 27157612 DOI: 10.1038/onc.2016.169] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 03/31/2016] [Accepted: 04/11/2016] [Indexed: 12/15/2022]
Abstract
Using a 4-hydroxytamoxifen (4OHT)-inducible, conditional Sos1-null mutation, we analyzed wild-type (WT), single Sos1-KO, Sos2-KO and double Sos1/2 KO primary mouse embryonic fibroblasts (MEF) with an aim at evaluating the functional specificity or redundancy of the Sos1 and Sos2 alleles at the cellular level. The 4OHT-induced Sos1-KO and Sos1/2-DKO MEFs exhibited distinct flat morphology, enlarged cell perimeter and altered cytoskeletal organization that were not observed in the WT and Sos2-KO counterparts. The Sos1-KO and Sos1/2-DKO MEFs also displayed significant accumulation, in comparison with WT and Sos2-KO MEFs, of cytoplasmic vesicular bodies identified as autophagosomes containing degraded mitochondria by means of electron microscopy and specific markers. Cellular proliferation and migration were impaired in Sos1-KO and Sos1/2-DKO MEFs in comparison with WT and Sos2-KO MEFs, whereas cell adhesion was only impaired upon depletion of both Sos isoforms. RasGTP formation was practically absent in Sos1/2-DKO MEFs as compared with the other genotypes and extracellular signal-regulated kinase phosphorylation showed only significant reduction after combined Sos1/2 depletion. Consistent with a mitophagic phenotype, in vivo labeling with specific fluorophores uncovered increased levels of oxidative stress (elevated intracellular reactive oxygen species and mitochondrial superoxide and loss of mitochondrial membrane potential) in the Sos1-KO and the Sos1/2-DKO cells as compared with Sos2-KO and WT MEFs. Interestingly, treatment of the MEF cultures with antioxidants corrected the altered phenotypes of Sos1-KO and Sos1/2-DKO MEFs by restoring their altered perimeter size and proliferative rate to levels similar to those of WT and Sos2-KO MEFs. Our data uncover a direct mechanistic link between Sos1 and control of intracellular oxidative stress, and demonstrate functional prevalence of Sos1 over Sos2 with regards to cellular proliferation and viability.
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Palmer DC, Guittard GC, Franco Z, Crompton JG, Eil RL, Patel SJ, Ji Y, Van Panhuys N, Klebanoff CA, Sukumar M, Clever D, Chichura A, Roychoudhuri R, Varma R, Wang E, Gattinoni L, Marincola FM, Balagopalan L, Samelson LE, Restifo NP. Cish actively silences TCR signaling in CD8+ T cells to maintain tumor tolerance. J Exp Med 2015; 212:2095-113. [PMID: 26527801 PMCID: PMC4647263 DOI: 10.1084/jem.20150304] [Citation(s) in RCA: 126] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 09/11/2015] [Indexed: 01/17/2023] Open
Abstract
Palmer et al. find that Cish, a member of the SOCS family, is induced by TCR stimulation in CD8+ T cells and inhibits their functional avidity against tumor. The authors uncover a novel mechanism of suppression for a SOCS member. Improving the functional avidity of effector T cells is critical in overcoming inhibitory factors within the tumor microenvironment and eliciting tumor regression. We have found that Cish, a member of the suppressor of cytokine signaling (SOCS) family, is induced by TCR stimulation in CD8+ T cells and inhibits their functional avidity against tumors. Genetic deletion of Cish in CD8+ T cells enhances their expansion, functional avidity, and cytokine polyfunctionality, resulting in pronounced and durable regression of established tumors. Although Cish is commonly thought to block STAT5 activation, we found that the primary molecular basis of Cish suppression is through inhibition of TCR signaling. Cish physically interacts with the TCR intermediate PLC-γ1, targeting it for proteasomal degradation after TCR stimulation. These findings establish a novel targetable interaction that regulates the functional avidity of tumor-specific CD8+ T cells and can be manipulated to improve adoptive cancer immunotherapy.
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Affiliation(s)
| | | | | | | | | | | | - Yun Ji
- National Cancer Institute, Bethesda, MD 20892
| | | | | | | | - David Clever
- National Cancer Institute, Bethesda, MD 20892 Medical Scientist Training Program, The Ohio State University College of Medicine, Columbus, OH 43210
| | | | | | - Rajat Varma
- National Institute of Allergy and Infectious Disease, Bethesda, MD 20892
| | - Ena Wang
- Sidra Medical and Research Center, Doha, Qatar
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Dik S, Pennings JLA, van Loveren H, Ezendam J. Development of an in vitro test to identify respiratory sensitizers in bronchial epithelial cells using gene expression profiling. Toxicol In Vitro 2015; 30:274-80. [PMID: 26518187 DOI: 10.1016/j.tiv.2015.10.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 10/21/2015] [Accepted: 10/24/2015] [Indexed: 11/29/2022]
Abstract
Chemicals that induce asthma at the workplace are substances of concern. At present, there are no widely accepted methods to identify respiratory sensitizers, and classification of these substances is based on human occupational data. Several studies have contributed to understanding the mechanisms involved in respiratory sensitization, although uncertainties remain. One point of interest for respiratory sensitization is the reaction of the epithelial lung barrier to respiratory sensitizers. To elucidate potential molecular effects of exposure of the epithelial lung barrier, a gene expression profile was created based on a DNA microarray experiment using the bronchial epithelial cell line 16 HBE14o(-). The cells were exposed to 12 respiratory sensitizers and 10 non-sensitizers. For statistical analysis, we used a class prediction approach that combined three machine learning algorithms, leave-one-compound-out cross validation, and majority voting per tested compound. This approach allowed for a prediction accuracy of 95%. Identified predictive genes were mainly associated with the cytoskeleton and barrier function of the epithelial cell. Several of these genes were reported to be associated with asthma as well. Taken together, this indicates that pulmonary barrier function is an important target for respiratory sensitizers and associated genes can be used to predict the respiratory sensitization potential of chemicals.
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Affiliation(s)
- Sander Dik
- Centre for Health Protection, National Institute for Public Health and the Environment, 3720 BA Bilthoven, The Netherlands; Department of Toxicogenomics, Maastricht University, 6200 MD Maastricht, The Netherlands
| | - Jeroen L A Pennings
- Centre for Health Protection, National Institute for Public Health and the Environment, 3720 BA Bilthoven, The Netherlands
| | - Henk van Loveren
- Centre for Health Protection, National Institute for Public Health and the Environment, 3720 BA Bilthoven, The Netherlands; Department of Toxicogenomics, Maastricht University, 6200 MD Maastricht, The Netherlands
| | - Janine Ezendam
- Centre for Health Protection, National Institute for Public Health and the Environment, 3720 BA Bilthoven, The Netherlands.
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