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Li Y, Lai J, Ran M, Yi T, Zhou L, Luo J, Liu X, Tang X, Huang M, Xie X, Li H, Yang Y, Zou W, Wu J. Alnustone promotes megakaryocyte differentiation and platelet production via the interleukin-17A/interleukin-17A receptor/Src/RAC1/MEK/ERK signaling pathway. Eur J Pharmacol 2024; 971:176548. [PMID: 38570080 DOI: 10.1016/j.ejphar.2024.176548] [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: 10/31/2023] [Revised: 03/20/2024] [Accepted: 03/27/2024] [Indexed: 04/05/2024]
Abstract
OBJECTIVES Thrombocytopenia is a disease in which the number of platelets in the peripheral blood decreases. It can be caused by multiple genetic factors, and numerous challenges are associated with its treatment. In this study, the effects of alnustone on megakaryocytes and platelets were investigated, with the aim of developing a new therapeutic approach for thrombocytopenia. METHODS Random forest algorithm was used to establish a drug screening model, and alnustone was identified as a natural active compound that could promote megakaryocyte differentiation. The effect of alnustone on megakaryocyte activity was determined using cell counting kit-8. The effect of alnustone on megakaryocyte differentiation was determined using flow cytometry, Giemsa staining, and phalloidin staining. A mouse model of thrombocytopenia was established by exposing mice to X-rays at 4 Gy and was used to test the bioactivity of alnustone in vivo. The effect of alnustone on platelet production was determined using zebrafish. Network pharmacology was used to predict targets and signaling pathways. Western blotting and immunofluorescence staining determined the expression levels of proteins. RESULTS Alnustone promoted the differentiation and maturation of megakaryocytes in vitro and restored platelet production in thrombocytopenic mice and zebrafish. Network pharmacology and western blotting showed that alnustone promoted the expression of interleukin-17A and enhanced its interaction with its receptor, and thereby regulated downstream MEK/ERK signaling and promoted megakaryocyte differentiation. CONCLUSIONS Alnustone can promote megakaryocyte differentiation and platelet production via the interleukin-17A/interleukin-17A receptor/Src/RAC1/MEK/ERK signaling pathway and thus provides a new therapeutic strategy for the treatment of thrombocytopenia.
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Affiliation(s)
- Yueyue Li
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| | - Jia Lai
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, China; School of Pharmacy, Southwest Medical University, Luzhou, 646000, China.
| | - Mei Ran
- School of Pharmacy, Southwest Medical University, Luzhou, 646000, China.
| | - Taian Yi
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| | - Ling Zhou
- School of Pharmacy, Southwest Medical University, Luzhou, 646000, China.
| | - Jiesi Luo
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, China.
| | - Xiaoxi Liu
- School of Pharmacy, Southwest Medical University, Luzhou, 646000, China.
| | - Xiaoqin Tang
- School of Pharmacy, Southwest Medical University, Luzhou, 646000, China.
| | - Miao Huang
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| | - Xiang Xie
- School of Basic Medical Sciences, Public Center of Experimental Technology, Model Animal and Human Disease Research of Luzhou Key Laboratory, Southwest Medical University, Luzhou, China.
| | - Hong Li
- School of Pharmacy, Southwest Medical University, Luzhou, 646000, China.
| | - Yan Yang
- Education Ministry Key Laboratory of Medical Electrophysiology, Sichuan Key Medical Laboratory of New Drug Discovery and Druggability Evaluation, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Southwest Medical University, Luzhou, 646000, China.
| | - Wenjun Zou
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| | - Jianming Wu
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, China; School of Pharmacy, Southwest Medical University, Luzhou, 646000, China; Education Ministry Key Laboratory of Medical Electrophysiology, Sichuan Key Medical Laboratory of New Drug Discovery and Druggability Evaluation, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Southwest Medical University, Luzhou, 646000, China.
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Zhang Y, Zhou Y, Li X, Pan X, Bai J, Chen Y, Lai Z, Chen Q, Ma F, Dong Y. Small-molecule α-lipoic acid targets ELK1 to balance human neutrophil and erythrocyte differentiation. Stem Cell Res Ther 2024; 15:100. [PMID: 38589882 PMCID: PMC11003016 DOI: 10.1186/s13287-024-03711-6] [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: 10/30/2022] [Accepted: 03/31/2024] [Indexed: 04/10/2024] Open
Abstract
BACKGROUND Erythroid and myeloid differentiation disorders are commonly occurred in leukemia. Given that the relationship between erythroid and myeloid lineages is still unclear. To find the co-regulators in erythroid and myeloid differentiation might help to find new target for therapy of myeloid leukemia. In hematopoiesis, ALA (alpha lipoic acid) is reported to inhibit neutrophil lineage determination by targeting transcription factor ELK1 in granulocyte-monocyte progenitors via splicing factor SF3B1. However, further exploration is needed to determine whether ELK1 is a common regulatory factor for erythroid and myeloid differentiation. METHODS In vitro culture of isolated CD34+, CMPs (common myeloid progenitors) and CD34+ CD371- HSPCs (hematopoietic stem progenitor cells) were performed to assay the differentiation potential of monocytes, neutrophils, and erythrocytes. Overexpression lentivirus of long isoform (L-ELK1) or the short isoform (S-ELK1) of ELK1 transduced CD34+ HSPCs were transplanted into NSG mice to assay the human lymphocyte and myeloid differentiation differences 3 months after transplantation. Knocking down of SRSF11, which was high expressed in CD371+GMPs (granulocyte-monocyte progenitors), upregulated by ALA and binding to ELK1-RNA splicing site, was performed to analyze the function in erythroid differentiation derived from CD34+ CD123mid CD38+ CD371- HPCs (hematopoietic progenitor cells). RNA sequencing of L-ELK1 and S-ELK1 overexpressed CD34+ CD123mid CD38+ CD371- HPCs were performed to assay the signals changed by ELK1. RESULTS Here, we presented new evidence that ALA promoted erythroid differentiation by targeting the transcription factor ELK1 in CD34+ CD371- hematopoietic stem progenitor cells (HSPCs). Overexpression of either the long isoform (L-ELK1) or the short isoform (S-ELK1) of ELK1 inhibited erythroid-cell differentiation, but knockdown of ELK1 did not affect erythroid-cell differentiation. RNAseq analysis of CD34+ CD123mid CD38+ CD371- HPCs showed that L-ELK1 upregulated the expression of genes related to neutrophil activity, phosphorylation, and hypoxia signals, while S-ELK1 mainly regulated hypoxia-related signals. However, most of the genes that were upregulated by L-ELK1 were only moderately upregulated by S-ELK1, which might be due to a lack of serum response factor interaction and regulation domains in S-ELK1 compared to L-ELK1. In summary, the differentiation of neutrophils and erythrocytes might need to rely on the dose of L-ELK1 and S-ELK1 to achieve precise regulation via RNA splicing signals at early lineage commitment. CONCLUSIONS ALA and ELK1 are found to regulate both human granulopoiesis and erythropoiesis via RNA spliceosome, and ALA-ELK1 signal might be the target of human leukemia therapy.
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Affiliation(s)
- Yimeng Zhang
- Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Xindu Road 783, Chengdu, 610500, China
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC), Chengdu, China
| | - Ya Zhou
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC), Chengdu, China
| | - Xiaohong Li
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC), Chengdu, China
| | - Xu Pan
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC), Chengdu, China
| | - Ju Bai
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC), Chengdu, China
| | - Yijin Chen
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC), Chengdu, China
| | | | - Qiang Chen
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC), Chengdu, China
| | - Feng Ma
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC), Chengdu, China.
| | - Yong Dong
- Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Xindu Road 783, Chengdu, 610500, China.
- Center for Stem Cell Research and Application, Institute of Blood Transfusion, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC), Chengdu, China.
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Erol ÖD, Şenocak Ş, Aerts-Kaya F. The Role of Rab GTPases in the development of genetic and malignant diseases. Mol Cell Biochem 2024; 479:255-281. [PMID: 37060515 DOI: 10.1007/s11010-023-04727-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 04/01/2023] [Indexed: 04/16/2023]
Abstract
Small GTPases have been shown to play an important role in several cellular functions, including cytoskeletal remodeling, cell polarity, intracellular trafficking, cell-cycle, progression and lipid transformation. The Ras-associated binding (Rab) family of GTPases constitutes the largest family of GTPases and consists of almost 70 known members of small GTPases in humans, which are known to play an important role in the regulation of intracellular membrane trafficking, membrane identity, vesicle budding, uncoating, motility and fusion of membranes. Mutations in Rab genes can cause a wide range of inherited genetic diseases, ranging from neurodegenerative diseases, such as Parkinson's disease (PD) and Alzheimer's disease (AD) to immune dysregulation/deficiency syndromes, like Griscelli Syndrome Type II (GS-II) and hemophagocytic lymphohistiocytosis (HLH), as well as a variety of cancers. Here, we provide an extended overview of human Rabs, discussing their function and diseases related to Rabs and Rab effectors, as well as focusing on effects of (aberrant) Rab expression. We aim to underline their importance in health and the development of genetic and malignant diseases by assessing their role in cellular structure, regulation, function and biology and discuss the possible use of stem cell gene therapy, as well as targeting of Rabs in order to treat malignancies, but also to monitor recurrence of cancer and metastasis through the use of Rabs as biomarkers. Future research should shed further light on the roles of Rabs in the development of multifactorial diseases, such as diabetes and assess Rabs as a possible treatment target.
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Affiliation(s)
- Özgür Doğuş Erol
- Department of Stem Cell Sciences, Hacettepe University Graduate School of Health Sciences, 06100, Ankara, Turkey
- Hacettepe University Center for Stem Cell Research and Development, 06100, Ankara, Turkey
| | - Şimal Şenocak
- Department of Stem Cell Sciences, Hacettepe University Graduate School of Health Sciences, 06100, Ankara, Turkey
- Hacettepe University Center for Stem Cell Research and Development, 06100, Ankara, Turkey
| | - Fatima Aerts-Kaya
- Department of Stem Cell Sciences, Hacettepe University Graduate School of Health Sciences, 06100, Ankara, Turkey.
- Hacettepe University Center for Stem Cell Research and Development, 06100, Ankara, Turkey.
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Huang M, Wang L, Zhang Q, Zhou L, Liao R, Wu A, Wang X, Luo J, Huang F, Zou W, Wu J. Interleukins in Platelet Biology: Unraveling the Complex Regulatory Network. Pharmaceuticals (Basel) 2024; 17:109. [PMID: 38256942 PMCID: PMC10820339 DOI: 10.3390/ph17010109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/04/2024] [Accepted: 01/11/2024] [Indexed: 01/24/2024] Open
Abstract
Interleukins, a diverse family of cytokines produced by various cells, play crucial roles in immune responses, immunoregulation, and a wide range of physiological and pathological processes. In the context of megakaryopoiesis, thrombopoiesis, and platelet function, interleukins have emerged as key regulators, exerting significant influence on the development, maturation, and activity of megakaryocytes (MKs) and platelets. While the therapeutic potential of interleukins in platelet-related diseases has been recognized for decades, their clinical application has been hindered by limitations in basic research and challenges in drug development. Recent advancements in understanding the molecular mechanisms of interleukins and their interactions with MKs and platelets, coupled with breakthroughs in cytokine engineering, have revitalized the field of interleukin-based therapeutics. These breakthroughs have paved the way for the development of more effective and specific interleukin-based therapies for the treatment of platelet disorders. This review provides a comprehensive overview of the effects of interleukins on megakaryopoiesis, thrombopoiesis, and platelet function. It highlights the potential clinical applications of interleukins in regulating megakaryopoiesis and platelet function and discusses the latest bioengineering technologies that could improve the pharmacokinetic properties of interleukins. By synthesizing the current knowledge in this field, this review aims to provide valuable insights for future research into the clinical application of interleukins in platelet-related diseases.
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Affiliation(s)
- Miao Huang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (M.H.); (Q.Z.)
| | - Long Wang
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou 646000, China; (L.W.); (L.Z.); (R.L.); (A.W.); (F.H.)
| | - Qianhui Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (M.H.); (Q.Z.)
| | - Ling Zhou
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou 646000, China; (L.W.); (L.Z.); (R.L.); (A.W.); (F.H.)
| | - Rui Liao
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou 646000, China; (L.W.); (L.Z.); (R.L.); (A.W.); (F.H.)
| | - Anguo Wu
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou 646000, China; (L.W.); (L.Z.); (R.L.); (A.W.); (F.H.)
| | - Xinle Wang
- Department of Physiology, School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, China; (X.W.); (J.L.)
| | - Jiesi Luo
- Department of Physiology, School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, China; (X.W.); (J.L.)
| | - Feihong Huang
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou 646000, China; (L.W.); (L.Z.); (R.L.); (A.W.); (F.H.)
| | - Wenjun Zou
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (M.H.); (Q.Z.)
| | - Jianming Wu
- Department of Physiology, School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, China; (X.W.); (J.L.)
- The Key Laboratory of Medical Electrophysiology, Institute of Cardiovascular Research, Ministry of Education of China, Luzhou 646000, China
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Vestre K, Persiconi I, Borg Distefano M, Mensali N, Guadagno NA, Bretou M, Wälchli S, Arnold-Schrauf C, Bakke O, Dalod M, Lennon-Dumenil AM, Progida C. Rab7b regulates dendritic cell migration by linking lysosomes to the actomyosin cytoskeleton. J Cell Sci 2021; 134:272095. [PMID: 34494097 PMCID: PMC8487646 DOI: 10.1242/jcs.259221] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 08/16/2021] [Indexed: 12/26/2022] Open
Abstract
Lysosomal signaling facilitates the migration of immune cells by releasing Ca2+ to activate the actin-based motor myosin II at the cell rear. However, how the actomyosin cytoskeleton physically associates to lysosomes is unknown. We have previously identified myosin II as a direct interactor of Rab7b, a small GTPase that mediates the transport from late endosomes/lysosomes to the trans-Golgi network (TGN). Here, we show that Rab7b regulates the migration of dendritic cells (DCs) in one- and three-dimensional environments. DCs are immune sentinels that transport antigens from peripheral tissues to lymph nodes to activate T lymphocytes and initiate adaptive immune responses. We found that the lack of Rab7b reduces myosin II light chain phosphorylation and the activation of the transcription factor EB (TFEB), which controls lysosomal signaling and is required for fast DC migration. Furthermore, we demonstrate that Rab7b interacts with the lysosomal Ca2+ channel TRPML1 (also known as MCOLN1), enabling the local activation of myosin II at the cell rear. Taken together, our findings identify Rab7b as the missing physical link between lysosomes and the actomyosin cytoskeleton, allowing control of immune cell migration through lysosomal signaling. This article has an associated First Person interview with the first author of the paper. Summary: The small GTPase Rab7b bridges the lysosomal Ca2+ channel TRPML1 to myosin II, thus enabling the local activation of myosin II at the cell rear and promoting fast migration of dendritic cells.
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Affiliation(s)
- Katharina Vestre
- Department of Biosciences, Centre for Immune Regulation, University of Oslo, 0316 Oslo, Norway
| | - Irene Persiconi
- Department of Biosciences, Centre for Immune Regulation, University of Oslo, 0316 Oslo, Norway
| | - Marita Borg Distefano
- Department of Biosciences, Centre for Immune Regulation, University of Oslo, 0316 Oslo, Norway
| | - Nadia Mensali
- Department of Cellular Therapy, the Radium Hospital, Oslo University Hospital, 0379 Oslo, Norway
| | | | - Marine Bretou
- Institut Curie, Inserm U932, F-75005 Paris, France.,VIB-KU Leuven Center for Brain and Disease Research, 3000 Leuven, Belgium
| | - Sébastien Wälchli
- Department of Cellular Therapy, the Radium Hospital, Oslo University Hospital, 0379 Oslo, Norway
| | - Catharina Arnold-Schrauf
- Aix Marseille Univ, CNRS, INSERM, Centre d'Immunologie de Marseille-Luminy, 13288 Marseille, France
| | - Oddmund Bakke
- Department of Biosciences, Centre for Immune Regulation, University of Oslo, 0316 Oslo, Norway
| | - Marc Dalod
- Aix Marseille Univ, CNRS, INSERM, Centre d'Immunologie de Marseille-Luminy, 13288 Marseille, France
| | | | - Cinzia Progida
- Department of Biosciences, Centre for Immune Regulation, University of Oslo, 0316 Oslo, Norway
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Zhang Y, Li D, Zeng Q, Feng J, Fu H, Luo Z, Xiao B, Yang H, Wu M. LRRC4 functions as a neuron-protective role in experimental autoimmune encephalomyelitis. Mol Med 2021; 27:44. [PMID: 33932995 PMCID: PMC8088686 DOI: 10.1186/s10020-021-00304-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 04/19/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Leucine rich repeat containing 4 (LRRC4), also known as netrin-G ligand-2 (NGL-2), belongs to the superfamily of LRR proteins and serves as a receptor for netrin-G2. LRRC4 regulates the formation of excitatory synapses and promotes axon differentiation. Mutations in LRRC4 occur in Autism Spectrum Disorder (ASD) and intellectual disability. Multiple sclerosis (MS) is a chronic neuroinflammatory disease with spinal cords demyelination and neurodegeneration. Here, we sought to investigate whether LRRC4 is involved in spinal cords neuron-associated diseases. METHODS LRRC4 was detected in the CNS of experimental autoimmune encephalomyelitis (EAE) mice by the use of real-time PCR and western blotting. LRRC4-/- mice were created and immunized with myelin oligodendrocyte glycoprotein peptide (MOG)35-55. Pathological changes in spinal cords of LRRC4-/- and WT mice 15 days after immunization were examined by using hematoxylin and eosin (H&E), Luxol Fast Blue (LFB) staining and immunohistochemistry. The number of Th1/Th2/Th17/Treg cells in spleens and blood were measured with flow cytometry. Differential gene expression in the spinal cords from WT and LRRC4-/- mice was analyzed by using RNA sequencing (RNA-seq). Adeno-associated virus (AAV) vectors were used to overexpress LRRC4 (AAV-LRRC4) and were injected into EAE mice to assess the therapeutic effect of AAV-LRRC4 ectopic expression on EAE. RESULTS We report that LRRC4 is mainly expressed in neuron of spinal cords, and is decreased in the spinal cords of the EAE mice. Knockout of LRRC4 have a disease progression quickened and exacerbated with more severe myelin degeneration and infiltration of leukocytes into the spinal cords. We also first found that Rab7b is high expressed in EAE mice, and the deficiency of LRRC4 induces the elevated NF-κB p65 by up-regulating Rab7b, and up-regulation of IL-6, IFN-γ and down-regulation of TNF-α, results in more severe Th1 immune response in LRRC4-/- mice. Ectopic expression of LRRC4 alleviates the clinical symptoms of EAE mice and protects the neurons from immune damages. CONCLUSIONS We identified a neuroprotective role of LRRC4 in the progression of EAE, which may be used as a potential target for auxiliary support therapeutic treatment of MS.
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Affiliation(s)
- Yan Zhang
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, 410013, Hunan, China
- The Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410008, Hunan, China
- Department of Pathology, Affiliated Hospital of Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Di Li
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, 410013, Hunan, China
- The Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410008, Hunan, China
| | - Qiuming Zeng
- Internal Medicine-Neurology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Jianbo Feng
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, 410013, Hunan, China
- The Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410008, Hunan, China
| | - Haijuan Fu
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, 410013, Hunan, China
- The Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410008, Hunan, China
| | - Zhaohui Luo
- Internal Medicine-Neurology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Bo Xiao
- Internal Medicine-Neurology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Huan Yang
- Internal Medicine-Neurology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
| | - Minghua Wu
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, 410013, Hunan, China.
- The Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410008, Hunan, China.
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Kuo SC, Li Y, Cheng KC, Niu CS, Cheng JT, Niu HS. Investigation of the pronounced erythropoietin-induced reduction in hyperglycemia in type 1-like diabetic rats. Endocr J 2018; 65:181-191. [PMID: 29109360 DOI: 10.1507/endocrj.ej17-0353] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Erythropoietin (EPO) is known to stimulate erythropoiesis after binding with its specific receptor. In clinics, EPO is widely used in hemodialyzed patients with diabetes. However, changes in the expression of the erythropoietin receptor (EPOR) under diabetic conditions are still unclear. Therefore, we investigated EPOR expression both in vivo and in vitro. Streptozotocin-induced type 1-like diabetic rats (STZ rats) were used to evaluate the blood glucose-lowering effects of EPO. The expression and activity of the transducer and activator of transcription 3 (STAT3), the potential signaling molecule, was investigated in cultured rat skeletal myoblast (L6) cells incubated in high-glucose (HG) medium to mimic the in vivo changes. The EPO-induced reduction in hyperglycemia was more pronounced in diabetic rats. The increased EPOR expression in the soleus muscle of diabetic rats was reversed by the reduction in hyperglycemia. Glucose uptake was also increased in high-glucose (HG)-treated L6 cells. Western blotting results indicated that the EPO-induced hyperglycemic activity was enhanced mainly through an increase in EPOR expression. Increased EPOR expression was associated with the enhanced nuclear expression of STAT3 in HG-exposed L6 cells. In addition, treatment with siRNA specific to STAT3 reversed the increased expression of EPOR observed in these cells. Treatment with Stattic at a dose sufficient to inhibit STAT3 reduced the expression level of EPOR in STZ rats. In conclusion, the increased expression of EPOR by hyperglycemia is mainly associated with an augmented expression of nuclear STAT3, which was identified both in vivo and in vitro in the present study.
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MESH Headings
- Animals
- Blood Glucose/drug effects
- Blood Glucose/metabolism
- Cells, Cultured
- Diabetes Mellitus, Experimental/chemically induced
- Diabetes Mellitus, Experimental/complications
- Diabetes Mellitus, Experimental/drug therapy
- Diabetes Mellitus, Experimental/physiopathology
- Diabetes Mellitus, Type 1/chemically induced
- Diabetes Mellitus, Type 1/complications
- Diabetes Mellitus, Type 1/drug therapy
- Diabetes Mellitus, Type 1/physiopathology
- Erythropoiesis/drug effects
- Erythropoietin/therapeutic use
- Hyperglycemia/etiology
- Hyperglycemia/prevention & control
- Male
- Rats
- Rats, Wistar
- Receptors, Erythropoietin/genetics
- Receptors, Erythropoietin/metabolism
- Streptozocin
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Affiliation(s)
- Shu-Chun Kuo
- Department of Optometry, Chung Hwa University of Medical Technology, Tainan 71701, Taiwan
- Department of Ophthalmology, Chi-Mei Medical Center, Tainan 71003, Taiwan
| | - Yingxiao Li
- Department of Medical Research, Chi-Mei Medical Center, Tainan 71003, Taiwan
- Department of Psychosomatic Internal Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima 890-8520, Japan
| | - Kai-Chun Cheng
- Department of Psychosomatic Internal Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima 890-8520, Japan
| | - Chiang-Shan Niu
- Department of Nursing, Tzu Chi University of Science and Technology, Hualien 97005, Taiwan
| | - Juei-Tang Cheng
- Department of Medical Research, Chi-Mei Medical Center, Tainan 71003, Taiwan
- Institute of Medical Science, College of Health Science, Chang Jung Christian University, Tainan 71101, Taiwan
| | - Ho-Shan Niu
- Department of Nursing, Tzu Chi University of Science and Technology, Hualien 97005, Taiwan
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Kuo SC, Li Y, Cheng KC, Niu CS, Cheng JT, Niu HS. Increase in renal erythropoietin receptors in diabetic rats is mainly mediated by hyperglycemia associated with the STAT3/GATA-1 signaling pathway. Biomed Pharmacother 2017; 96:1094-1102. [DOI: 10.1016/j.biopha.2017.11.115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Revised: 11/18/2017] [Accepted: 11/20/2017] [Indexed: 10/18/2022] Open
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Duchez P, Rodriguez L, Chevaleyre J, Lapostolle V, Vlaski M, Brunet de la Grange P, Ivanovic Z. Interleukin-6 enhances the activity of in vivo long-term reconstituting hematopoietic stem cells in "hypoxic-like" expansion cultures ex vivo. Transfusion 2015; 55:2684-91. [PMID: 26013839 DOI: 10.1111/trf.13175] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 04/22/2015] [Accepted: 04/24/2015] [Indexed: 12/23/2022]
Abstract
BACKGROUND Since interleukin (IL)-6 synergizes with the physiologically relevant O2 concentration in the maintenance of primitive hematopoietic stem cell (HSC) subpopulations, we hypothesized that its addition to our hypoxic response mimicking cultures (HRMCs), composed of an antioxidant-supplied serum-free xeno-free medium supplemented with the cytokines stabilizing hypoxia-inducible factor-1α and balancing HSC self-renewal and commitment, will result in a similar effect even if they are exposed to 20% O2 . STUDY DESIGN AND METHODS HRMCs were exposed to 20 and 5% O2 with and without IL-6. Functional committed progenitors (colony-forming cells [CFCs]: CFU-GM, BFU-E, CFU-Mix, and CFU-Mk) were evaluated as well as the short- and long-term repopulating HSCs using in vivo NSG mice model (primary and secondary recipients, respectively). RESULTS The addition of IL-6 to HRMCs exposed to 20% O2 did not significantly impact either the CFCs or in vivo short-term repopulating cells. However, it enhanced both the frequency and the individual proliferative capacity of the most primitive long-term repopulating cell population evidenced by the generation of human CFCs in the marrow of secondary recipient mice. The exposure of HRMCs to 5% O2 negatively affected the amplification of CFCs, which was not changed by the addition of IL-6 and exhibited a partial enhancing effect on the long-term repopulating cells. CONCLUSION The addition of IL-6 to the cytokine cocktail further improves our expansion procedure based on atmospheric O2 concentration-exposed HRMCs by enhancing the maintenance of the most primitive HSCs without a negative impact on the less primitive HSC populations and CFCs.
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Affiliation(s)
- Pascale Duchez
- Etablissement Français du Sang Aquitaine-Limousin and UMR 5164 CNRS/Université de Bordeaux, Bordeaux, France
| | - Laura Rodriguez
- Etablissement Français du Sang Aquitaine-Limousin and UMR 5164 CNRS/Université de Bordeaux, Bordeaux, France
| | - Jean Chevaleyre
- Etablissement Français du Sang Aquitaine-Limousin and UMR 5164 CNRS/Université de Bordeaux, Bordeaux, France
| | - Veronique Lapostolle
- Etablissement Français du Sang Aquitaine-Limousin and UMR 5164 CNRS/Université de Bordeaux, Bordeaux, France
| | - Marija Vlaski
- Etablissement Français du Sang Aquitaine-Limousin and UMR 5164 CNRS/Université de Bordeaux, Bordeaux, France
| | | | - Zoran Ivanovic
- Etablissement Français du Sang Aquitaine-Limousin and UMR 5164 CNRS/Université de Bordeaux, Bordeaux, France
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Kim M, Tan YS, Cheng WC, Kingsbury TJ, Heimfeld S, Civin CI. MIR144 and MIR451 regulate human erythropoiesis via RAB14. Br J Haematol 2014; 168:583-97. [PMID: 25312678 DOI: 10.1111/bjh.13164] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 08/15/2014] [Indexed: 12/11/2022]
Abstract
Expression levels of MIR144 and MIR451 increase during erythropoiesis, a pattern that is conserved from zebrafish to humans. As these two miRs are expressed from the same polycistronic transcript, we manipulated MIR144 and MIR451 in human erythroid cells individually and together to investigate their effects on human erythropoiesis. Inhibition of endogenous human MIR451 resulted in decreased numbers of erythroid (CD71(hi) CD235a(hi) CD34(-) ) cells, consistent with prior studies in zebrafish and mice. In addition, inhibition of MIR144 impaired human erythroid differentiation, unlike in zebrafish and mouse studies where the functional effect of MIR144 on erythropoiesis was minimal. In this study, we found RAB14 is a direct target of both MIR144 and MIR451. As MIR144 and MIR451 expression increased during human erythropoiesis, RAB14 protein expression decreased. Enforced RAB14 expression phenocopied the effect of MIR144 and/or MIR451 depletion, whereas shRNA-mediated RAB14 knockdown protected cells from MIR144 and/or MIR451 depletion-mediated erythropoietic inhibition. RAB14 knockdown increased the frequency and number of erythroid cells, increased β-haemoglobin expression, and decreased CBFA2T3 expression during human erythropoiesis. In summary, we utilized MIR144 and MIR451 to identify RAB14 as a novel physiological inhibitor of human erythropoiesis.
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Affiliation(s)
- MinJung Kim
- Departments of Physiology and Pediatrics, Center for Stem Cell Biology & Regenerative Medicine, Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA
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11
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Borg M, Bakke O, Progida C. A novel interaction between Rab7b and actomyosin reveals a dual role in intracellular transport and cell migration. J Cell Sci 2014; 127:4927-39. [PMID: 25217632 DOI: 10.1242/jcs.155861] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Rab proteins are small GTPases that regulate transport between the different compartments of the endomembrane system in eukaryotic cells. Here, we show that Rab7b, a Rab that controls the transport between late endosomes and the trans Golgi network, interacts directly with myosin II. We illustrate the functional relevance of this interaction, demonstrating that myosin II mediates the transport of Rab7b endosomes, as Rab7b dynamics are strongly affected after myosin II depletion or inhibition. We also demonstrate that a member of the Rab family regulates actin remodeling and, consequently, influences cell adhesion, polarization and migration. We find the molecular mechanism by which Rab7b influences stress fiber formation - through controlling the activation status of the small GTPase RhoA and therefore influencing myosin light chain phosphorylation. Our findings reveal a newly identified role for Rab proteins outside of their canonical role in intracellular trafficking, identifying Rab7b as a coordinator of cytoskeletal organization.
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Affiliation(s)
- Marita Borg
- Department of Biosciences, Centre for Immune Regulation, University of Oslo, Blindernveien 31, 0371 Oslo, Norway
| | - Oddmund Bakke
- Department of Biosciences, Centre for Immune Regulation, University of Oslo, Blindernveien 31, 0371 Oslo, Norway
| | - Cinzia Progida
- Department of Biosciences, Centre for Immune Regulation, University of Oslo, Blindernveien 31, 0371 Oslo, Norway
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12
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Ge W, Li D, Gao Y, Cao X. The Roles of Lysosomes in Inflammation and Autoimmune Diseases. Int Rev Immunol 2014; 34:415-31. [DOI: 10.3109/08830185.2014.936587] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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13
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Su YC, Li SC, Peng HY, Ho YH, Chen LJ, Liao HF. RAD001-mediated STAT3 upregulation and megakaryocytic differentiation. Thromb Haemost 2013; 109:540-9. [PMID: 23329056 DOI: 10.1160/th12-10-0734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 12/11/2012] [Indexed: 01/15/2023]
Abstract
RAD001 is currently used as an immunosuppressant and anticancer drug. Megakaryocyte (MK) differentiation includes development from pluripotent stem cells to proliferation and differentiation toward MK formation and platelet maturation. Our preliminary assay showed that RAD001 might stimulate MK differentiation; however, the exact regulatory mechanisms needed to be elucidated. By the ex vivo assay, RAD001 induced MK differentiation in human haematopoietic stem cells, with both the stimulation of CFU-GM colony formation and CD61 surface marker expression. Then, BALB/c mice were orally administrated with or without agrylin and/or RAD001 for 15 days. The platelet count and bone marrow CFU-MK colony formation were eliminated by agrylin, but unchanged in RAD001 and RAD001 plus agrylin mice. An ex vivo assay of bone marrow-derived stem cells demonstrated that RAD001 increased the number of CFU-MK colonies. The MK count in bone section indicated the decreased effect by agrylin and then recovered by RAD001. The level of plasma thrombopoietin was also enhanced in RAD001-treated mice. The effect of RAD001 on human leukaemic K562 and HEL cells showed the growth inhibition and MK differentiation activities; including morphological observation, CD41 and CD61 expression, and platelet factor 4 secretion. In RAD001-treated HEL cells, p-STAT3 expression, STAT3 translocation, and STAT3-DNA binding activity were up-regulated. Furthermore, STAT3 siRNA decreased the p-STAT3 and CD61 expression, as well as the CD61 fluorescence intensity, indicating that STAT3 may be critical in RAD001-mediated MK differentiation. Conclusion, the present study demonstrated that RAD001 might have the capacity to induce MK differentiation through the up-regulation of STAT3 signalling.
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Affiliation(s)
- Yu-Chieh Su
- Department of Internal Medicine, Buddhist Dalin Tzu Chi General Hospital, and Department of Biochemical Science and Technology, National Chiayi University, 300 University Road, Chiayi 600, Taiwan
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14
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Progida C, Nielsen MS, Koster G, Bucci C, Bakke O. Dynamics of Rab7b-dependent transport of sorting receptors. Traffic 2012; 13:1273-85. [PMID: 22708738 DOI: 10.1111/j.1600-0854.2012.01388.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 06/11/2012] [Accepted: 06/18/2012] [Indexed: 12/26/2022]
Abstract
The small GTPase Rab7b localizes to late endosomes-lysosomes and to the Golgi, regulating the transport between these two intracellular compartments. We have recently demonstrated that depletion of Rab7b causes missorting of the cation-independent mannose 6-phosphate receptor (CI-MPR), suggesting that Rab7b may control the trafficking of this receptor. Here we further investigated the function of this small GTPase with special attention to its role in the trafficking of sorting receptors and dynamics in living cells. Using endosome-to-Golgi retrieval assays we show that Rab7b is involved not only in CI-MPR transport but also in the MPRs independent pathway. Indeed, we find that it regulates and interacts with sortilin, a mannose 6-phosphate-independent sorting receptor. CI-MPR and sortilin are sorted from the trans-Golgi network (TGN) in tubular structures and the expression of Rab7b mutants or its silencing reduces CI-MPR and sortilin tubulation. In addition, the constitutively active mutant Rab7b Q67L impairs the formation of carriers from TGN. Collectively, our observations show for the first time that Rab7b is required for transport from endosomes to the TGN, not only of the CI-MPR, but also of sortilin, and that alterations in this transport result in impaired carrier formation from TGN.
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Affiliation(s)
- Cinzia Progida
- Centre for Immune Regulation, Department of Molecular Biosciences, University of Oslo, Blindernveien 31, 0371, Oslo, Norway
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Kang K, Jung H, Nam S, Lim JS. NDRG2 Promotes GATA-1 Expression through Regulation of the JAK2/STAT Pathway in PMA-stimulated U937 Cells. Immune Netw 2011; 11:348-57. [PMID: 22346774 PMCID: PMC3275703 DOI: 10.4110/in.2011.11.6.348] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2011] [Revised: 10/18/2011] [Accepted: 10/29/2011] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND N-myc downstream-regulated gene 2 (NDRG2), a member of a newly described family of differentiation-related genes, has been characterized as a regulator of dendritic cells. However, the role of NDRG2 on the expression and activation of transcription factors in blood cells remains poorly understood. In this study, we investigated the effects of NDRG2 overexpression on GATA-1 expression in PMA-stimulated U937 cells. METHODS We generated NDRG2-overexpressing U937 cell line (U937-NDRG2) and treated the cells with PMA to investigate the role of NDRG2 on GATA-1 expression. RESULTS NDRG2 overexpression in U937 cells significantly induced GATA-1 expression in response to PMA stimulation. Interestingly, JAK2/STAT and BMP-4/Smad pathways associated with the induction of GATA-1 were activated in PMA-stimulated U937-NDRG2 cells. We found that the inhibition of JAK2 activation, but not of BMP-4/Smad signaling, can elicit a decrease of PMA-induced GATA-1 expression in U937-NDRG2 cells. CONCLUSION The results reveal that NDRG2 promotes the expression of GATA-1 through activation of the JAK2/STAT pathway, but not through the regulation of the BMP-4/Smad pathway in U937 cells. Our findings further suggest that NDRG2 may play a role as a regulator of erythrocyte and megakaryocyte differentiation during hematopoiesis.
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Affiliation(s)
- Kyeongah Kang
- Department of Biological Science and the Research Center for Women's Disease, Sookmyung Women's University, Seoul 140-742, Korea
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Yang M, Wang C, Zhu X, Tang S, Shi L, Cao X, Chen T. E3 ubiquitin ligase CHIP facilitates Toll-like receptor signaling by recruiting and polyubiquitinating Src and atypical PKC{zeta}. ACTA ACUST UNITED AC 2011; 208:2099-112. [PMID: 21911421 PMCID: PMC3182058 DOI: 10.1084/jem.20102667] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In mouse macrophages and dendritic cells, the CHIP E3 ubiquitin ligase is needed for transduction of signals initiated by TLR4 and TLR9 stimulation. The carboxyl terminus of constitutive heat shock cognate 70 (HSC70)–interacting protein (CHIP, also known as Stub1) is a U box–containing E3 ubiquitin ligase that is important for protein quality control. The role of CHIP in innate immunity is not known. Here, we report that CHIP knockdown inhibits Toll-like receptor (TLR) 4– and TLR9-driven signaling, but not TLR3-driven signaling; proinflammatory cytokine and type 1 interferon (IFN) production; and maturation of antigen-presenting cells, including macrophages and dendritic cells. We demonstrate that CHIP can recruit the tyrosine kinase Src and atypical protein kinase C ζ (PKCζ) to the TLR complex, thereby leading to activation of IL-1 receptor–associated kinase 1, TANK-binding kinase 1, and IFN regulatory factors 3 and 7. CHIP acts as an E3 ligase for Src and PKCζ during TLR signaling. CHIP-mediated enhancement of TLR signaling is inhibited by IFNAR deficiency or expression of ubiquitination resistant mutant forms of Src or PKCζ. These findings suggest that CHIP facilitates the formation of a TLR signaling complex by recruiting, ubiquitinating, and activating Src and PKCζ.
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Affiliation(s)
- Mingjin Yang
- Institute of Immunology, Zhejiang University School of Medicine, Hangzhou 310058, China; National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai200433, China
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