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Qiu X, Ye H, Li X, Li D, Jiang L, Liu R, Zhao Z, He D. IL-6/JAK2-dependent G6PD phosphorylation promotes nucleotide synthesis and supports tumor growth. Mol Metab 2023; 78:101836. [PMID: 37949355 PMCID: PMC10692918 DOI: 10.1016/j.molmet.2023.101836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 10/16/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023] Open
Abstract
OBJECTIVE Tumor cells hijack inflammatory mechanisms to promote their own growth. IL-6 is one of the major cytokines, and is frequently upregulated in tumors. The pentose phosphate pathway (PPP) generates the indispensable building blocks to produce various nucleotides. Here we aimed to determine whether and how PPP is timely tuned in response to IL-6 to support tumor growth. METHODS Protein expression was examined by immunoblot. Protein interaction was examined by immunoprecipitation. Tumor cell proliferation in in vitro culture was examined by BrdU assay and colony formation assay. Tumor cell proliferation in mouse xenograft model was examined by Ki-67 staining. RESULTS Here we show that the metabolic flux of PPP and enzymatic activity of glucose-6-phosphate dehydrogenase (G6PD) is rapidly induced under IL-6 treatment, without obvious changes in G6PD expression level. Mechanistically, Janus kinase 2 (JAK2) phosphorylates G6PD Y437 under IL-6 treatment, which accentuates G6PD enzymatic activity by promoting G6PD binding with its substrate G6P. Further, JAK2-dependent G6PD Y437 phosphorylation is required for IL-6-induced nucleotide biosynthesis and tumor cell proliferation, and is associated with the progression of oral squamous cell carcinoma. CONCLUSIONS Our findings report a new mechanism implicated in the crosstalk between tumor cells and inflammatory microenvironment, by which JAK2-dependent activation of G6PD governs nucleotide synthesis to support tumor cell proliferation, thereby highlighting its value as a potential anti-tumor target.
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Affiliation(s)
- Xuemei Qiu
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, Department of Oral Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, PR China
| | - Hongping Ye
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, Department of Oral Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, PR China
| | - Xiaofei Li
- Department of Oncology, The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, Sichuan, 610057, PR China
| | - Dan Li
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, Department of Oral Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, PR China
| | - Lu Jiang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, Department of Oral Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, PR China.
| | - Rui Liu
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, Department of Oral Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, PR China.
| | - Zhe Zhao
- Nuclear Stress Medicine Center, The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, Sichuan, 610057, PR China.
| | - Dan He
- Department of Oncology, The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, Sichuan, 610057, PR China.
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Yin A, Yuan R, Xiao Q, Zhang W, Xu K, Yang X, Yang W, Xu L, Wang X, Zhuang F, Li Y, Cai Z, Sun Z, Zhou B, He B, Shen L. Exercise-derived peptide protects against pathological cardiac remodeling. EBioMedicine 2022; 82:104164. [PMID: 35843176 PMCID: PMC9297110 DOI: 10.1016/j.ebiom.2022.104164] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 06/29/2022] [Accepted: 06/29/2022] [Indexed: 11/22/2022] Open
Abstract
Background Exercise training protects the heart against pathological cardiac remodeling and confers cardioprotection from heart failure. However, the underlying mechanism is still elusive. Methods An integrative analysis of multi-omics data of the skeletal muscle in response to exercise is performed to search for potential exerkine. Then, CCDC80tide is examined in humans after acute exercise. The role of CCDC80tide is assessed in a mouse model of hypertensive cardiac remodeling and in hypertension-mediated cell injury models. The transcriptomic analysis and immunoprecipitation assay are conducted to explore the mechanism. Findings The coiled-coil domain-containing protein 80 (CCDC80) is found strongly positively associated with exercise. Interestingly, exercise stimuli induce the secretion of C-terminal CCDC80 (referred as CCDC80tide hereafter) via EVs-encapsulated CCDC80tide into the circulation. Importantly, cardiac-specific expression of CCDC80tide protects against angiotensin II (Ang II)-induced cardiac hypertrophy and fibrosis in mice. In in vitro studies, the expression of CCDC80tide reduces Ang II-induced cardiomyocyte hypertrophy, cardiac microvascular endothelial cell (CMEC) inflammation, and mitigated vascular smooth muscle cell (VSMC) proliferation and collagen formation. To understand the cardioprotective effect of CCDC80tide, a transcriptomic analysis reveals a dramatic inhibition of the STAT3 (Signal transducer and activator of transcription 3) signaling pathway in CCDC80tide overexpressing cells. Mechanistically, CCDC80tide selectively interacts with the kinase-active form of JAK2 (Janus kinase 2) and consequently inhibits its kinase activity to phosphorylate and activate STAT3. Interpretation The results provide new insights into exercise-afforded cardioprotection in pathological cardiac remodeling and highlight the therapeutic potential of CCDC80tide in heart failure treatment. Funding This work was supported by the National Natural Science Foundation of China [Grant/Award Numbers: 81770428, 81830010, 82130012, 81900438, 82100447); Shanghai Science and Technology Committee [Grant/Award Numbers: 21S11903000, 19JC1415702]; Emerging and Advanced Technology Programs of Hospital Development Center of Shanghai [Grant/Award Number: SHDC12018129]; China Postdoctoral Science Foundation [2021M692108]; and China National Postdoctoral Program for Innovative Talents [BX20200211].
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Affiliation(s)
- Anwen Yin
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Ruosen Yuan
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Qingqing Xiao
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Weifeng Zhang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Ke Xu
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Xiaoxiao Yang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Wentao Yang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Lei Xu
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Xia Wang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Fei Zhuang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Yi Li
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Zhaohua Cai
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Zhe Sun
- School of Life Science and Technology, Shanghai Tech University, Shanghai, China
| | - Bin Zhou
- Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Ben He
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China.
| | - Linghong Shen
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China.
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Castanho I, Murray TK, Hannon E, Jeffries A, Walker E, Laing E, Baulf H, Harvey J, Bradshaw L, Randall A, Moore K, O'Neill P, Lunnon K, Collier DA, Ahmed Z, O'Neill MJ, Mill J. Transcriptional Signatures of Tau and Amyloid Neuropathology. Cell Rep 2020; 30:2040-2054.e5. [PMID: 32049030 PMCID: PMC7016505 DOI: 10.1016/j.celrep.2020.01.063] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 11/21/2019] [Accepted: 01/21/2020] [Indexed: 12/31/2022] Open
Abstract
Alzheimer's disease (AD) is associated with the intracellular aggregation of hyperphosphorylated tau and the accumulation of β-amyloid in the neocortex. We use transgenic mice harboring human tau (rTg4510) and amyloid precursor protein (J20) mutations to investigate transcriptional changes associated with the progression of tau and amyloid pathology. rTg4510 mice are characterized by widespread transcriptional differences in the entorhinal cortex with changes paralleling neuropathological burden across multiple brain regions. Differentially expressed transcripts overlap with genes identified in genetic studies of familial and sporadic AD. Systems-level analyses identify discrete co-expression networks associated with the progressive accumulation of tau that are enriched for genes and pathways previously implicated in AD pathology and overlap with co-expression networks identified in human AD cortex. Our data provide further evidence for an immune-response component in the accumulation of tau and reveal molecular pathways associated with the progression of AD neuropathology.
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Affiliation(s)
- Isabel Castanho
- Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, University of Exeter, Exeter EX2 5DW, UK
| | - Tracey K Murray
- Eli Lilly & Co., Erl Wood Manor, Sunninghill Road, Windlesham GU20 6PH, UK
| | - Eilis Hannon
- Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, University of Exeter, Exeter EX2 5DW, UK
| | - Aaron Jeffries
- Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, University of Exeter, Exeter EX2 5DW, UK
| | - Emma Walker
- Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, University of Exeter, Exeter EX2 5DW, UK
| | - Emma Laing
- Eli Lilly & Co., Erl Wood Manor, Sunninghill Road, Windlesham GU20 6PH, UK
| | - Hedley Baulf
- Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, University of Exeter, Exeter EX2 5DW, UK
| | - Joshua Harvey
- Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, University of Exeter, Exeter EX2 5DW, UK
| | - Lauren Bradshaw
- Eli Lilly & Co., Erl Wood Manor, Sunninghill Road, Windlesham GU20 6PH, UK
| | - Andrew Randall
- Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, University of Exeter, Exeter EX2 5DW, UK
| | - Karen Moore
- Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, University of Exeter, Exeter EX2 5DW, UK
| | - Paul O'Neill
- Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, University of Exeter, Exeter EX2 5DW, UK
| | - Katie Lunnon
- Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, University of Exeter, Exeter EX2 5DW, UK
| | - David A Collier
- Eli Lilly & Co., Erl Wood Manor, Sunninghill Road, Windlesham GU20 6PH, UK
| | - Zeshan Ahmed
- Eli Lilly & Co., Erl Wood Manor, Sunninghill Road, Windlesham GU20 6PH, UK
| | - Michael J O'Neill
- Eli Lilly & Co., Erl Wood Manor, Sunninghill Road, Windlesham GU20 6PH, UK
| | - Jonathan Mill
- Institute of Biomedical and Clinical Sciences, University of Exeter Medical School, University of Exeter, Exeter EX2 5DW, UK.
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Coiled-coil domain-containing 80 accelerates atherosclerosis development through decreasing lipoprotein lipase expression via ERK1/2 phosphorylation and TET2 expression. Eur J Pharmacol 2018; 843:177-189. [PMID: 30439364 DOI: 10.1016/j.ejphar.2018.11.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 11/07/2018] [Accepted: 11/07/2018] [Indexed: 12/18/2022]
Abstract
Recent studies showed that coiled-coil domain-containing 80 (CCDC80) has a positive link with atherosclerosis and that plasma CCDC80 levels are positively correlated with the levels of fasting plasma triglycerides (TG) in obese individuals. The underlying mechanisms, however, are unclear. Using Hematoxylin-eosin (H&E) and Oil Red O staining, we found that CCDC80 overexpression in vivo significantly increased plasma lipid contents, decreased the expression and activity of lipoprotein lipase (LPL), and accelerated the development of atherosclerosis. Conversely, knockdown of CCDC80 decreased plaque lesions area. In vitro, qRT-PCR and western blot results showed that CCDC80 overexpression significantly decreased, while CCDC80 knockdown increased, LPL expression in cultured vascular smooth muscle cells (VSMCs). Further, we found that CCDC80 reduced LPL expression via inhibiting the phosphorylation of extracellular regulated protein kinase 1/2 (ERK1/2) and also increased the methylation of LPL promoter via down-regulating Tet methylcytosine dioxygenase 2 (TET2). Our results also revealed that CCDC80 significantly down-regulated TET2 expression through decreasing the phosphorylation of ERK1/2. In addition, we found that CCDC80 decreased binding of TET2 to forkhead box O3 (FOXO3a) but had no effect on FOXO3a expression. On the other hand, and that FOXO3a was partially involved in TET2-regulated LPL expression. CCDC80 down-regulated ERK1/2 phosphorylation and decreased expression of TET2 and its interaction with FOXO3a, leading to a reduction of LPL expression and acceleration of atherosclerosis.
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The genetic architecture of the genome-wide transcriptional response to ER stress in the mouse. PLoS Genet 2015; 11:e1004924. [PMID: 25651210 PMCID: PMC4412289 DOI: 10.1371/journal.pgen.1004924] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 11/26/2014] [Indexed: 12/22/2022] Open
Abstract
Endoplasmic reticulum (ER) stress occurs when misfolded proteins accumulate in the ER. The cellular response to ER stress involves complex transcriptional and translational changes, important to the survival of the cell. ER stress is a primary cause and a modifier of many human diseases. A first step to understanding how the ER stress response impacts human disease is to determine how the transcriptional response to ER stress varies among individuals. The genetic diversity of the eight mouse Collaborative Cross (CC) founder strains allowed us to determine how genetic variation impacts the ER stress transcriptional response. We used tunicamycin, a drug commonly used to induce ER stress, to elicit an ER stress response in mouse embryonic fibroblasts (MEFs) derived from the CC founder strains and measured their transcriptional responses. We identified hundreds of genes that differed in response to ER stress across these genetically diverse strains. Strikingly, inflammatory response genes differed most between strains; major canonical ER stress response genes showed relatively invariant responses across strains. To uncover the genetic architecture underlying these strain differences in ER stress response, we measured the transcriptional response to ER stress in MEFs derived from a subset of F1 crosses between the CC founder strains. We found a unique layer of regulatory variation that is only detectable under ER stress conditions. Over 80% of the regulatory variation under ER stress derives from cis-regulatory differences. This is the first study to characterize the genetic variation in ER stress transcriptional response in the laboratory mouse. Our findings indicate that the ER stress transcriptional response is highly variable among strains and arises from genetic variation in individual downstream response genes, rather than major signaling transcription factors. These results have important implications for understanding how genetic variation impacts the ER stress response, an important component of many human diseases.
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Song X, Tanaka H, Ohta K. Multiple roles of Equarin during lens development. Dev Growth Differ 2014; 56:199-205. [DOI: 10.1111/dgd.12121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 01/07/2014] [Accepted: 01/07/2014] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaohong Song
- Division of Developmental Neurobiology Faculty of Life Sciences Kumamoto University 1‐1‐1 Honjo Chuo‐ku Kumamoto 860‐8556 Japan
| | - Hideaki Tanaka
- Division of Developmental Neurobiology Faculty of Life Sciences Kumamoto University 1‐1‐1 Honjo Chuo‐ku Kumamoto 860‐8556 Japan
| | - Kunimasa Ohta
- Division of Developmental Neurobiology Faculty of Life Sciences Kumamoto University 1‐1‐1 Honjo Chuo‐ku Kumamoto 860‐8556 Japan
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Ejarque M, Altirriba J, Gomis R, Gasa R. Characterization of the transcriptional activity of the basic helix-loop-helix (bHLH) transcription factor Atoh8. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2013; 1829:1175-83. [PMID: 23938248 DOI: 10.1016/j.bbagrm.2013.08.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 08/04/2013] [Accepted: 08/06/2013] [Indexed: 12/18/2022]
Abstract
The atonal-related Neurogenin/NeuroD family of basic helix-loop-helix (bHLH) transcription factors comprises potent inducers of neuronal and endocrine differentiation programs in the nervous and digestive system. Atonal homolog 8 (Atoh8) displays high similarity in the bHLH domain with NeuroD proteins. Yet, available evidences indicate that Atoh8 has distinctive features including a ubiquitous expression pattern in embryonic tissues and the ability to inhibit differentiation. To gain insights into Atoh8 function, we aimed at identifying Atoh8 targets and investigated the effects of Atoh8 on global gene expression patterns in pancreatic mPAC cells, a model of bHLH-dependent endocrine differentiation. Our data reveal that Atoh8 is a weak transcriptional activator and does not exhibit proendocrine activity. Conversely, it blocks the induction of a reduced group of gene targets of the atonal-related proendocrine factor Neurogenin3. We show that Atoh8 lacks a transactivation domain and possesses intrinsic repressor activity that depends on a conserved Proline-rich domain. Atoh8 binds the ubiquitous E protein E47 and its ability to repress transcription may partly result from its ability to inhibit E47/E47 and Neurogenin3/E47 dimer activities. These results reveal distinctive transcriptional properties of Atoh8 within the atonal-related bHLH family that may be associated with the acquisition of new biological functions.
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Affiliation(s)
- Miriam Ejarque
- Diabetes and Obesity Research Laboratory, Institut D'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain; CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Spain
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