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Zhang H, Dhalla NS. The Role of Pro-Inflammatory Cytokines in the Pathogenesis of Cardiovascular Disease. Int J Mol Sci 2024; 25:1082. [PMID: 38256155 PMCID: PMC10817020 DOI: 10.3390/ijms25021082] [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: 12/07/2023] [Revised: 01/11/2024] [Accepted: 01/12/2024] [Indexed: 01/24/2024] Open
Abstract
With cardiovascular disease (CVD) being a primary source of global morbidity and mortality, it is crucial that we understand the molecular pathophysiological mechanisms at play. Recently, numerous pro-inflammatory cytokines have been linked to several different CVDs, which are now often considered an adversely pro-inflammatory state. These cytokines most notably include interleukin-6 (IL-6),tumor necrosis factor (TNF)α, and the interleukin-1 (IL-1) family, amongst others. Not only does inflammation have intricate and complex interactions with pathophysiological processes such as oxidative stress and calcium mishandling, but it also plays a role in the balance between tissue repair and destruction. In this regard, pre-clinical and clinical evidence has clearly demonstrated the involvement and dynamic nature of pro-inflammatory cytokines in many heart conditions; however, the clinical utility of the findings so far remains unclear. Whether these cytokines can serve as markers or risk predictors of disease states or act as potential therapeutic targets, further extensive research is needed to fully understand the complex network of interactions that these molecules encompass in the context of heart disease. This review will highlight the significant advances in our understanding of the contributions of pro-inflammatory cytokines in CVDs, including ischemic heart disease (atherosclerosis, thrombosis, acute myocardial infarction, and ischemia-reperfusion injury), cardiac remodeling (hypertension, cardiac hypertrophy, cardiac fibrosis, cardiac apoptosis, and heart failure), different cardiomyopathies as well as ventricular arrhythmias and atrial fibrillation. In addition, this article is focused on discussing the shortcomings in both pathological and therapeutic aspects of pro-inflammatory cytokines in CVD that still need to be addressed by future studies.
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Affiliation(s)
- Hannah Zhang
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Naranjan S. Dhalla
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, College of Medicine, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
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Thakkar C, Alikunju S, Niranjan N, Rizvi W, Abbas A, Abdellatif M, Sayed D. Klf9 plays a critical role in GR -dependent metabolic adaptations in cardiomyocytes. Cell Signal 2023; 111:110886. [PMID: 37690661 PMCID: PMC10591860 DOI: 10.1016/j.cellsig.2023.110886] [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: 06/02/2023] [Revised: 08/29/2023] [Accepted: 09/07/2023] [Indexed: 09/12/2023]
Abstract
Glucocorticoids through activation of the Glucocorticoid receptor (GR) play an essential role in cellular homeostasis during physiological variations and in response to stress. Our genomic GR binding and transcriptome data from Dexamethasone (Dex) treated cardiomyocytes showed an early differential regulation of mostly transcription factors, followed by sequential change in genes involved in downstream functional pathways. We examined the role of Krüppel-like factor 9 (Klf9), an early direct target of GR in cardiomyocytes. Klf9-ChIPseq identified 2150 genes that showed an increase in Klf9 binding in response to Dex. Transcriptome analysis of Dex treated cardiomyocytes with or without knockdown of Klf9 revealed differential regulation of 1777 genes, of which a reversal in expression is seen in 1640 genes with knockdown of Klf9 compared to Dex. Conversely, only 137 (∼8%) genes show further dysregulation in expression with siKLf9, as seen with Dex treated cardiomyocytes. Functional annotation identified genes of metabolic pathways on the top of differentially expressed genes, including those involved in glycolysis and oxidative phosphorylation. Knockdown of Klf9 in cardiomyocytes inhibited Dex induced increase in glycolytic function and mitochondrial spare respiratory capacity, as measured by glycolysis and mito stress tests, respectively. Thus, we conclude that cyclic, diurnal GR activation, through Klf9 -dependent feedforward signaling plays a central role in maintaining cellular homeostasis through metabolic adaptations in cardiomyocytes.
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Affiliation(s)
- Chandni Thakkar
- From the Department of Cell Biology and Molecular Medicine, Rutgers New Jersey Medical School, Newark, NJ 07103, United States of America
| | - Saleena Alikunju
- From the Department of Cell Biology and Molecular Medicine, Rutgers New Jersey Medical School, Newark, NJ 07103, United States of America
| | - Nandita Niranjan
- From the Department of Cell Biology and Molecular Medicine, Rutgers New Jersey Medical School, Newark, NJ 07103, United States of America
| | - Wajiha Rizvi
- High School Research Intern, Wayne Hills High School, Wayne, NJ 07470, United States of America
| | - Ali Abbas
- From the Department of Diagnostic Sciences, Rutgers School of Dental Medicine, Newark, NJ 07103, United States of America
| | - Maha Abdellatif
- From the Department of Cell Biology and Molecular Medicine, Rutgers New Jersey Medical School, Newark, NJ 07103, United States of America
| | - Danish Sayed
- From the Department of Cell Biology and Molecular Medicine, Rutgers New Jersey Medical School, Newark, NJ 07103, United States of America.
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Chen X, Tang H, Lu K, Niu Z, Sheng W, Hwang HY, Pang PYK, Phillips JD, Khoynezhad A, Qu X, Li B, Han W. Gene modules and genes associated with postoperative atrial fibrillation: weighted gene co-expression network analysis and circRNA-miRNA-mRNA regulatory network analysis. J Thorac Dis 2023; 15:4949-4960. [PMID: 37868904 PMCID: PMC10586969 DOI: 10.21037/jtd-23-1179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 08/31/2023] [Indexed: 10/24/2023]
Abstract
Background Atrial fibrillation (AF) is the most common complication in patients undergoing cardiac surgery. However, the pathogenesis of postoperative AF (POAF) is elusive, and research related to this topic is sparse. Our study aimed to identify key gene modules and genes and to conduct a circular RNA (circRNA)-microRNA (miRNA)-messenger RNA (mRNA) regulatory network analysis of POAF on the basis of bioinformatic analysis. Methods The GSE143924 and GSE97455 data sets from the Gene Expression Omnibus (GEO) database were analyzed. Weighted gene co-expression network analysis (WGCNA) was used to identify the key gene modules and genes related to POAF. A circRNA-miRNA-mRNA regulatory network was also built according to differential expression analysis. Functional enrichment analysis was further performed according to Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis. Results WGCNA identified 2 key gene modules and 44 key genes that were significantly related to POAF. Functional enrichment analysis of these key genes implicated the following important biological processes (BPs): endosomal transport, protein kinase B signaling, and transcription regulation. The circRNA-miRNA-mRNA regulatory network suggested that KLF10 may take critical part in POAF. Moreover, 2 novel circRNAs, hsa_circRNA_001654 and hsa_circRNA_005899, and 2 miRNAs, hsa-miR-19b-3p and hsa-miR-30a-5p, which related with KLF10, were involved in the network. Conclusions Our study provides foundational expression profiles following POAF based on WGCNA. The circRNA-miRNA-mRNA network offers insights into the BPs and underlying mechanisms of POAF.
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Affiliation(s)
- Xiaomeng Chen
- Department of Cardiology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
- Department of Cardiology, Qingdao Municipal Hospital, University of Health and Rehabilitation Sciences, Qingdao, China
| | - Huaiguang Tang
- Department of Cardiology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
- Department of Cardiology, Qingdao Municipal Hospital, University of Health and Rehabilitation Sciences, Qingdao, China
| | - Kongmiao Lu
- Department of Pulmonary and Critical Care Medicine, University of Health and Rehabilitation Sciences, Qingdao, China
| | - Zhaozhuo Niu
- Department of Cardiovascular Surgery, University of Health and Rehabilitation Sciences, Qingdao, China
| | - Wei Sheng
- Department of Cardiovascular Surgery, University of Health and Rehabilitation Sciences, Qingdao, China
| | - Ho Young Hwang
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Philip Y. K. Pang
- Department of Cardiothoracic Surgery, National Heart Centre Singapore, Singapore, Singapore
| | - Joseph D. Phillips
- Section of Thoracic Surgery, Dartmouth-Hitchcock Medical Center, 1 Medical Center Dr., Lebanon, NH, USA
| | - Ali Khoynezhad
- Department of Cardiovascular Surgery, MemorialCare Heart and Vascular Institute, Long Beach, CA, USA
| | - Xiaolu Qu
- Department of Pulmonary and Critical Care Medicine, University of Health and Rehabilitation Sciences, Qingdao, China
| | - Bingong Li
- Department of Cardiology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
- Department of Cardiology, Qingdao Municipal Hospital, University of Health and Rehabilitation Sciences, Qingdao, China
| | - Wei Han
- Department of Pulmonary and Critical Care Medicine, University of Health and Rehabilitation Sciences, Qingdao, China
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Kammoun M, Nadal-Desbarats L, Même S, Lafoux A, Huchet C, Meyer-Dilhet G, Courchet J, Montigny F, Szeremeta F, Même W, Veksler V, Piquereau J, Pouletaut P, Subramaniam M, Hawse JR, Constans JM, Bensamoun SF. Deciphering the Role of Klf10 in the Cerebellum. JOURNAL OF BIOMEDICAL SCIENCE AND ENGINEERING 2022; 15:140-156. [PMID: 36507464 PMCID: PMC9733405 DOI: 10.4236/jbise.2022.155014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recent studies have demonstrated a new role for Klf10, a Krüppel-like transcription factor, in skeletal muscle, specifically relating to mitochondrial function. Thus, it was of interest to analyze additional tissues that are highly reliant on optimal mitochondrial function such as the cerebellum and to decipher the role of Klf10 in the functional and structural properties of this brain region. In vivo (magnetic resonance imaging and localized spectroscopy, behavior analysis) and in vitro (histology, spectroscopy analysis, enzymatic activity) techniques were applied to comprehensively assess the cerebellum of wild type (WT) and Klf10 knockout (KO) mice. Histology analysis and assessment of locomotion revealed no significant difference in Klf10 KO mice. Diffusion and texture results obtained using MRI revealed structural changes in KO mice characterized as defects in the organization of axons. These modifications may be explained by differences in the levels of specific metabolites (myo-inositol, lactate) within the KO cerebellum. Loss of Klf10 expression also led to changes in mitochondrial activity as reflected by a significant increase in the activity of citrate synthase, complexes I and IV. In summary, this study has provided evidence that Klf10 plays an important role in energy production and mitochondrial function in the cerebellum.
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Affiliation(s)
- Malek Kammoun
- Biomechanics and Bioengineering CNRS UMR 7338, Sorbonne University—University of Technology of Compiègne, Compiègne, France
| | | | - Sandra Même
- Center for Molecular Biophysics, CNRS UPR4301, Orléans, France
| | - Aude Lafoux
- Therassay Platform, University of Nantes, Nantes, France
| | | | | | - Julien Courchet
- CNRS UMR-5310 and INSERM U-1217, NeuroMyoGène Institute, Villeurbanne, France
| | | | | | - William Même
- Center for Molecular Biophysics, CNRS UPR4301, Orléans, France
| | - Vladimir Veksler
- INSERM UMR-S 1180, University of Paris-Saclay, Châtenay-Malabry, France
| | - Jérôme Piquereau
- INSERM UMR-S 1180, University of Paris-Saclay, Châtenay-Malabry, France
| | - Philippe Pouletaut
- Biomechanics and Bioengineering CNRS UMR 7338, Sorbonne University—University of Technology of Compiègne, Compiègne, France
| | | | - John R. Hawse
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, USA
| | | | - Sabine F. Bensamoun
- Biomechanics and Bioengineering CNRS UMR 7338, Sorbonne University—University of Technology of Compiègne, Compiègne, France
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Kammoun M, Pouletaut P, Morandat S, Subramaniam M, Hawse JR, Bensamoun SF. Krüppel-like factor 10 regulates the contractile properties of skeletal muscle fibers in mice. Muscle Nerve 2021; 64:765-769. [PMID: 34486132 DOI: 10.1002/mus.27412] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 08/30/2021] [Accepted: 08/31/2021] [Indexed: 11/07/2022]
Abstract
INTRODUCTION/AIMS Klf10 is a member of the Krüppel-like family of transcription factors, which is implicated in mediating muscle structure (fiber size, organization of the sarcomere), muscle metabolic activity (respiratory chain), and passive force. The aim of this study was to further characterize the roles of Klf10 in the contractile properties of skeletal muscle fibers. METHODS Fifty-two single fibers were extracted from female wild-type (WT) and Klf10 knockout (KO) oxidative (soleus) and glycolytic (extensor digitorum longus [EDL]) skinned muscles. Each fiber was immersed successively in relaxing (R), washing (W), and activating (A) solutions. Calcium was included in the activating solution to induce a maximum contraction of the fiber. The maximum force (Fmax ) was measured and normalized to the cross-sectional area to obtain the maximum stress (Stressmax ). After a steady state in contraction was reached, a quick stretch-release was performed; the force at the maximum stretch (Fstretch ) was measured and the stiffness was assessed. RESULTS Deletion of the Klf10 gene induced changes in the contractile parameters (Fmax , Stressmax , Stiffness), which were lower and higher for soleus and EDL fibers compared with littermates, respectively. These measurements also revealed changes in the proportion and resistance of attached cross-bridges. DISCUSSION Klf10 plays a major role in the homeostasis of the contractile behavior of skeletal muscle fibers in a muscle fiber type-specific manner. These findings further implicate important roles for Klf10 in skeletal muscle function and shed new light on understanding the molecular processes regulating the contractility of skeletal muscle fibers.
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Affiliation(s)
- Malek Kammoun
- Biomechanics and Bioengineering, Centre de recherche Royallieu, Université de technologie de Compiègne, Compiègne Cedex, France
| | - Philippe Pouletaut
- Biomechanics and Bioengineering, Centre de recherche Royallieu, Université de technologie de Compiègne, Compiègne Cedex, France
| | - Sandrine Morandat
- Biomechanics and Bioengineering, Centre de recherche Royallieu, Université de technologie de Compiègne, Compiègne Cedex, France
| | - Malayannan Subramaniam
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | - John R Hawse
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | - Sabine F Bensamoun
- Biomechanics and Bioengineering, Centre de recherche Royallieu, Université de technologie de Compiègne, Compiègne Cedex, France
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Guo HH, Jing XY, Chen H, Xu HX, Zhu BM. STAT3 but Not STAT5 Contributes to the Protective Effect of Electroacupuncture Against Myocardial Ischemia/Reperfusion Injury in Mice. Front Med (Lausanne) 2021; 8:649654. [PMID: 34307396 PMCID: PMC8299366 DOI: 10.3389/fmed.2021.649654] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 05/13/2021] [Indexed: 02/05/2023] Open
Abstract
Electroacupuncture (EA) can help reduce infarct size and injury resulting from myocardial ischemia/reperfusion (I/R); however, the underlying molecular mechanism remains unknown. We previously reported that STAT5 plays a critical role in the cardioprotective effect of remote ischemic preconditioning (RIPC). Here, we assessed the effects of electroacupuncture pretreatment (EAP) on myocardial I/R injury in the presence and/or absence of Stat5 in mice and investigated whether EAP exerts its cardioprotective effects in a STAT5-dependent manner. Adult Stat5fl/fl and Stat5-cKO mice were exposed to EAP at Neiguan (PC6) for 7 days before the induction of I/R injury by left anterior descending (LAD) coronary artery ligation. The myocardial infarct size (IS), area at risk, and apoptotic rate of cardiomyocytes were detected. RT-qPCR and western blotting were used to measure gene and protein expression, respectively, in homogenized heart tissues. RNA-seq was used to identify candidate genes and pathways. Our results showed that EAP decreased IS and the rate of cardiomyocyte apoptosis. We further found that STAT5 was activated by EAP in Stat5fl/fl mice but not in Stat5-cKO mice, whereas the opposite was observed for STAT3. Following EAP, the levels of the antiapoptotic proteins Bcl-xL, Bcl-2, and p-AKT were increased in the presence of Stat5, while that of interleukin 10 (IL-10) was increased in both Stat5fl/fl and Stat5-cKO. The gene expression profile in heart tissues was different between Stat5fl/fl and the Stat5-cKO mice with EAP. Importantly, the top 30 DEGs under EAP in the Stat5-cKO mice were enriched in the IL-6/STAT3 signaling pathway. Our results revealed for the first time that the protective effect of EAP following myocardial I/R injury was attributable to, but not dependent on, STAT5. Additionally, we found that EAP could activate STAT3 signaling in the absence of the Stat5 gene, and could also activate antiapoptotic, survival, and anti-inflammatory signaling pathways.
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Affiliation(s)
- Hui-Hui Guo
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xin-Yue Jing
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing, China
| | - Hui Chen
- Rehabilitation Medicine Department, YE DA Hospital of Yantai, Yantai, China
| | - Hou-Xi Xu
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing, China
| | - Bing-Mei Zhu
- Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, China
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Wu T, Li X, Jia X, Zhu Z, Lu J, Feng H, Shen B, Guo K, Li Y, Wang Q, Gao Z, Yu B, Ba Z, Huang Y, Wu D. Krüppel like factor 10 prevents intervertebral disc degeneration via TGF-β signaling pathway both in vitro and in vivo. J Orthop Translat 2021; 29:19-29. [PMID: 34094855 PMCID: PMC8141503 DOI: 10.1016/j.jot.2021.04.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 03/26/2021] [Accepted: 04/12/2021] [Indexed: 01/07/2023] Open
Abstract
Background Krüppel like factor 10 (KLF10), which is also known as TGF-β Inducible Early Gene-1 (TIEG1), plays a crucial role in regulating cell proliferation, cell apoptosis and inflammatory reaction in human carcinoma cells. Moreover, KLF10 knockout in mice leads to severe defects associated with muscle, skeleton and heart etc. However, the function of KLF10 in intervertebral disc degeneration (IVDD) has not been reported yet. Methods The relationship between KLF10 and IVDD were investigated in nucleus pulposus (NP) tissues from human and rats. The role of KLF10 in NP cells was explored via loss or gain of function experiments. IVDD rat models were constructed through needle puncture and the effects of KLF10 in IVDD model of rats were investigated via intradiscal injection of KLF10. Results We first found that KLF10 was lowly expressed in degenerative NP tissues and the level of KLF10 showed negative correlation with the disc grades of IVDD patients. Loss or gain of function experiments demonstrated that KLF10 could inhibit apoptosis and enhance migration and proliferation of IL-1β induced NP cells. And KLF10 overexpression reduced extracellular matrix (ECM) degeneration and enhanced ECM synthesis, whereas knockdown of KLF10 resulted in adverse effects. These positive effects of KLF10 could be reversed by the inhibition of TGF-β signaling pathway. In vivo, KLF10 overexpression alleviated IVDD. Conclusions This is the first study to reveal that KLF10 was dysregulated in IVDD and overexpressed KLF10 could alleviate IVDD by regulating TGF-β signaling pathway both in vitro and in vivo, which were involved in prohibiting apoptosis, promoting proliferation and migration of NP cells.The translational potential of this article: Overexpression of KLF10 might be an effective therapeutic strategy in the treatment of IVDD.
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Affiliation(s)
- Tongde Wu
- Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Xinhua Li
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Xuebing Jia
- Cancer Center, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Ziqi Zhu
- Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Jiawei Lu
- Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Hang Feng
- Department of Surgery of Spine and Spinal Cord, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, 450003, Henan, China
| | - Beiduo Shen
- Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Kai Guo
- Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Yuzhi Li
- Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Qiang Wang
- Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Zhiqiang Gao
- Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Bin Yu
- Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Zhaoyu Ba
- Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Yufeng Huang
- Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Desheng Wu
- Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
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Lee J, Oh AR, Lee HY, Moon YA, Lee HJ, Cha JY. Deletion of KLF10 Leads to Stress-Induced Liver Fibrosis upon High Sucrose Feeding. Int J Mol Sci 2020; 22:ijms22010331. [PMID: 33396939 PMCID: PMC7794950 DOI: 10.3390/ijms22010331] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 12/24/2020] [Accepted: 12/26/2020] [Indexed: 12/12/2022] Open
Abstract
Liver fibrosis is a consequence of chronic liver injury associated with chronic viral infection, alcohol abuse, and nonalcoholic fatty liver. The evidence from clinical and animal studies indicates that transforming growth factor-β (TGF-β) signaling is associated with the development of liver fibrosis. Krüppel-like factor 10 (KLF10) is a transcription factor that plays a significant role in TGF-β-mediated cell growth, apoptosis, and differentiation. In recent studies, it has been reported to be associated with glucose homeostasis and insulin resistance. In the present study, we investigated the role of KLF10 in the progression of liver disease upon a high-sucrose diet (HSD) in mice. Wild type (WT) and Klf10 knockout (KO) mice were fed either a control chow diet or HSD (50% sucrose) for eight weeks. Klf10 KO mice exhibited significant hepatic steatosis, inflammation, and liver injury upon HSD feeding, whereas the WT mice exhibited mild hepatic steatosis with no apparent liver injury. The livers of HSD-fed Klf10 KO mice demonstrated significantly increased endoplasmic reticulum stress, oxidative stress, and proinflammatory cytokines. Klf10 deletion led to the development of sucrose-induced hepatocyte cell death both in vivo and in vitro. Moreover, it significantly increased fibrogenic gene expression and collagen accumulation in the liver. Increased liver fibrosis was accompanied by increased phosphorylation and nuclear localization of Smad3. Here, we demonstrate that HSD-fed mice develop a severe liver injury in the absence of KLF10 due to the hyperactivation of the endoplasmic reticulum stress response and CCAAT/enhance-binding protein homologous protein (CHOP)-mediated apoptosis of hepatocytes. The current study suggests that KLF10 plays a protective role against the progression of hepatic steatosis into liver fibrosis in a lipogenic state.
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Affiliation(s)
- Junghoon Lee
- Department of Biochemistry, Lee Gil Ya Cancer and Diabetes Institute, Gachon University College of Medicine, Incheon 21999, Korea; (J.L.); (A.-R.O.); (H.-Y.L.)
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21999, Korea
| | - Ah-Reum Oh
- Department of Biochemistry, Lee Gil Ya Cancer and Diabetes Institute, Gachon University College of Medicine, Incheon 21999, Korea; (J.L.); (A.-R.O.); (H.-Y.L.)
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21999, Korea
| | - Hui-Young Lee
- Department of Biochemistry, Lee Gil Ya Cancer and Diabetes Institute, Gachon University College of Medicine, Incheon 21999, Korea; (J.L.); (A.-R.O.); (H.-Y.L.)
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21999, Korea
| | - Young-Ah Moon
- Department of Molecular Medicine, Inha University School of Medicine, Incheon 22212, Korea;
| | - Ho-Jae Lee
- Department of Biochemistry, Lee Gil Ya Cancer and Diabetes Institute, Gachon University College of Medicine, Incheon 21999, Korea; (J.L.); (A.-R.O.); (H.-Y.L.)
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21999, Korea
- Correspondence: (H.-J.L.); (J.-Y.C.); Tel.: +82-32-899-6054 (H.-J.L.); +82-32-899-6070 (J.-Y.C.)
| | - Ji-Young Cha
- Department of Biochemistry, Lee Gil Ya Cancer and Diabetes Institute, Gachon University College of Medicine, Incheon 21999, Korea; (J.L.); (A.-R.O.); (H.-Y.L.)
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21999, Korea
- Gachon Medical Research Institute, Gachon University Gil Medical Center, Incheon 21565, Korea
- Correspondence: (H.-J.L.); (J.-Y.C.); Tel.: +82-32-899-6054 (H.-J.L.); +82-32-899-6070 (J.-Y.C.)
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9
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Severinova E, Alikunju S, Deng W, Dhawan P, Sayed N, Sayed D. Glucocorticoid Receptor-Binding and Transcriptome Signature in Cardiomyocytes. J Am Heart Assoc 2020; 8:e011484. [PMID: 30866692 PMCID: PMC6475044 DOI: 10.1161/jaha.118.011484] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Background An increase in serum cortisol has been identified as a risk factor for cardiac failure, which highlights the impact of glucocorticoid signaling in cardiomyocytes and its influence in the progression of failure. Dexamethasone, a synthetic glucocorticoid, is sufficient for induction of cardiomyocyte hypertrophy, but little is known of the glucocorticoid receptor (GR) genome‐binding and ‐dependent transcriptional changes that mediate this phenotype. Methods and Results In this study using high‐resolution sequencing, we identified genomic targets of GR and associated change in the transcriptome after 1 and 24 hours of dexamethasone treatment. We showed that GR associates with 6482 genes in the cardiac genome, with differential regulation of 738 genes. Interestingly, alignment of the chromatin immunoprecipitation and RNA sequencing data show that, after 1 hour, 69% of differentially regulated genes are associated with GR and identify as regulators of RNA pol II–dependent transcription. Conversely, after 24 hours only 45% of regulated genes are associated with GR and involved in dilated and hypertrophic cardiomyopathies as well as other growth‐related pathways. In addition, our data also reveal that a majority of genes (76.42%) associated with GR show incremental changes in transcript abundance and are genes involved in basic cellular processes that might be regulated by the dynamics of promoter‐paused RNA pol II, as seen in hearts undergoing hypertrophy. In vivo administration of dexamethasone resulted in similar changes in the cardiac transcriptome, as seen in isolated cardiomyocytes. Conclusions Our data reveal genome‐wide GR binding sites in cardiomyocytes, identify novel targets and GR‐dependent change in the transcriptome that induces and contributes to cardiomyocyte hypertrophy.
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Affiliation(s)
- Elena Severinova
- 1 Department of Cell Biology and Molecular Medicine Rutgers New Jersey Medical School Newark NJ
| | - Saleena Alikunju
- 1 Department of Cell Biology and Molecular Medicine Rutgers New Jersey Medical School Newark NJ
| | - Wei Deng
- 1 Department of Cell Biology and Molecular Medicine Rutgers New Jersey Medical School Newark NJ
| | - Puneet Dhawan
- 2 Genomics Center Department of Microbiology Biochemistry and Molecular Genetics Rutgers New Jersey Medical School Newark NJ
| | - Nazish Sayed
- 3 Cardiovascular Institute Stanford University Stanford CA
| | - Danish Sayed
- 1 Department of Cell Biology and Molecular Medicine Rutgers New Jersey Medical School Newark NJ
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10
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Zhou M, Chen J, Zhang H, Liu H, Yao H, Wang X, Zhang W, Zhao Y, Yang N. KLF10 inhibits cell growth by regulating PTTG1 in multiple myeloma under the regulation of microRNA-106b-5p. Int J Biol Sci 2020; 16:2063-2071. [PMID: 32549754 PMCID: PMC7294933 DOI: 10.7150/ijbs.45999] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 05/05/2020] [Indexed: 11/10/2022] Open
Abstract
Krüppel-like factor 10 (KLF10) has been identified as an important regulator in carcinogenesis and cancer progression. However, the role of KLF10 in multiply myeloma (MM) development and progression remains unknown. In present study, we found that KLF10 mRNA and protein were down-regulated in MM tissues and cell lines. Notably, KLF10 inhibited cell proliferation, cell cycle progression and promoted apoptosis in vitro and in vivo. Furthermore, we confirmed that KLF10 inhibited β-catenin nuclear translocation and inhibited PTTG1 transcription. PTTG1 knockdown could mimic the biological effects of KLF10. Moreover, we demonstrated that KLF10 expression was regulated by miR-106b-5p. In MM tissues, miR-106b-5p has an inverse correlation with KLF10 expression. Conclusively, our results demonstrated that KLF10 functions as a tumor suppressor in regulating tumor growth of MM under regulation of miR-106b-5p, supporting its potential therapeutic target for MM.
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Affiliation(s)
- Mimi Zhou
- Department of Infectious Diseases, the First Affiliated Hospital of Xi'an Jiaotong University, Yanta West Road No. 277, Xi'an 710061, China
| | - Jinqiu Chen
- Department of Hematology, the Second Affiliated Hospital of Xi'an Jiaotong University, West Five Road No. 157, Xi'an 710004, China
| | - Hui Zhang
- Department of Hematology, the Second Affiliated Hospital of Xi'an Jiaotong University, West Five Road No. 157, Xi'an 710004, China
| | - Hailing Liu
- Department of Hematology, the Second Affiliated Hospital of Xi'an Jiaotong University, West Five Road No. 157, Xi'an 710004, China
| | - Huan Yao
- Department of Hematology, the Second Affiliated Hospital of Xi'an Jiaotong University, West Five Road No. 157, Xi'an 710004, China
| | - Xiaman Wang
- Department of Hematology, the Second Affiliated Hospital of Xi'an Jiaotong University, West Five Road No. 157, Xi'an 710004, China
| | - Wanggang Zhang
- Department of Hematology, the Second Affiliated Hospital of Xi'an Jiaotong University, West Five Road No. 157, Xi'an 710004, China
| | - Yingren Zhao
- Department of Infectious Diseases, the First Affiliated Hospital of Xi'an Jiaotong University, Yanta West Road No. 277, Xi'an 710061, China
| | - Nan Yang
- Department of Infectious Diseases, the First Affiliated Hospital of Xi'an Jiaotong University, Yanta West Road No. 277, Xi'an 710061, China
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11
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Kammoun M, Piquereau J, Nadal‐Desbarats L, Même S, Beuvin M, Bonne G, Veksler V, Le Fur Y, Pouletaut P, Même W, Szeremeta F, Constans J, Bruinsma ES, Nelson Holte MH, Najafova Z, Johnsen SA, Subramaniam M, Hawse JR, Bensamoun SF. Novel role of Tieg1 in muscle metabolism and mitochondrial oxidative capacities. Acta Physiol (Oxf) 2020; 228:e13394. [PMID: 31560161 DOI: 10.1111/apha.13394] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 09/20/2019] [Accepted: 09/23/2019] [Indexed: 12/26/2022]
Abstract
AIM Tieg1 is involved in multiple signalling pathways, human diseases, and is highly expressed in muscle where its functions are poorly understood. METHODS We have utilized Tieg1 knockout (KO) mice to identify novel and important roles for this transcription factor in regulating muscle ultrastructure, metabolism and mitochondrial functions in the soleus and extensor digitorum longus (EDL) muscles. RNA sequencing, immunoblotting, transmission electron microscopy, MRI, NMR, histochemical and mitochondrial function assays were performed. RESULTS Loss of Tieg1 expression resulted in altered sarcomere organization and a significant decrease in mitochondrial number. Histochemical analyses demonstrated an absence of succinate dehydrogenase staining and a decrease in cytochrome c oxidase (COX) enzyme activity in KO soleus with similar, but diminished, effects in the EDL. Decreased complex I, COX and citrate synthase (CS) activities were detected in the soleus muscle of KO mice indicating altered mitochondrial function. Complex I activity was also diminished in KO EDL. Significant decreases in CS and respiratory chain complex activities were identified in KO soleus. 1 H-NMR spectra revealed no significant metabolic difference between wild-type and KO muscles. However, 31 P spectra revealed a significant decrease in phosphocreatine and ATPγ. Altered expression of 279 genes, many of which play roles in mitochondrial and muscle function, were identified in KO soleus muscle. Ultimately, all of these changes resulted in an exercise intolerance phenotype in Tieg1 KO mice. CONCLUSION Our findings have implicated novel roles for Tieg1 in muscle including regulation of gene expression, metabolic activity and organization of tissue ultrastructure. This muscle phenotype resembles diseases associated with exercise intolerance and myopathies of unknown consequence.
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Affiliation(s)
- Malek Kammoun
- Biomechanics and Bioengineering Laboratory Alliance Sorbonne Universités Université de Technologie de Compiègne UMR CNRS 7338 Compiègne France
| | - Jerome Piquereau
- Signalling and Cardiovascular Pathophysiology ‐ UMR‐S 1180 Université Paris‐Sud INSERM Université Paris‐Saclay Châtenay‐Malabry France
| | | | - Sandra Même
- CNRS UPR4301 Centre de Biophysique Moléculaire Orléans France
| | - Maud Beuvin
- Inserm U974 Centre de Recherche en Myologie Sorbonne Université Paris France
| | - Gisèle Bonne
- Inserm U974 Centre de Recherche en Myologie Sorbonne Université Paris France
| | - Vladimir Veksler
- Signalling and Cardiovascular Pathophysiology ‐ UMR‐S 1180 Université Paris‐Sud INSERM Université Paris‐Saclay Châtenay‐Malabry France
| | - Yann Le Fur
- Aix‐Marseille University CNRS CRMBM Marseille France
| | - Philippe Pouletaut
- Biomechanics and Bioengineering Laboratory Alliance Sorbonne Universités Université de Technologie de Compiègne UMR CNRS 7338 Compiègne France
| | - William Même
- CNRS UPR4301 Centre de Biophysique Moléculaire Orléans France
| | | | - Jean‐Marc Constans
- Institut Faire Faces EA Chimère Imagerie et Radiologie Médicale CHU Amiens Amiens France
| | | | | | - Zeynab Najafova
- Department of General, Visceral and Pediatric Surgery University Medical Center Göttingen Göttingen Germany
| | - Steven A. Johnsen
- Department of General, Visceral and Pediatric Surgery University Medical Center Göttingen Göttingen Germany
| | | | - John R. Hawse
- Department of Biochemistry and Molecular Biology Mayo Clinic Rochester MN USA
| | - Sabine F. Bensamoun
- Biomechanics and Bioengineering Laboratory Alliance Sorbonne Universités Université de Technologie de Compiègne UMR CNRS 7338 Compiègne France
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12
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McGlaughon JL, Goldstein JL, Thaxton C, Hemphill SE, Berg JS. The progression of the ClinGen gene clinical validity classification over time. Hum Mutat 2019; 39:1494-1504. [PMID: 30311372 PMCID: PMC6190678 DOI: 10.1002/humu.23604] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 07/06/2018] [Accepted: 08/02/2018] [Indexed: 01/18/2023]
Abstract
In order for ClinGen to maintain up-to-date gene-disease clinical validity classifications for use by clinicians and clinical laboratories, an appropriate timeline for reevaluating curated gene-disease associations will need to be determined. To provide guidance on how often a gene-disease association should be recurated, a retrospective analysis of 30 gene curations was performed. Curations were simulated at one-year intervals starting with the year of the first publication to assert disease-causing variants in the gene to observe trends in the classification over time, as well as factors that influenced changes in classification. On average, gene-disease associations spent the least amount of time in the "Moderate" classification before progressing to "Strong" or "Definitive." In contrast, gene-disease associations that spent five or more years in the "Limited" classification were most likely to remain "Limited" or become "Disputed/Refuted." Large population datasets contributed to the reclassification of several gene-disease associations from "Limited" to "Disputed/Refuted." Finally, recent advancements in sequencing technology correlated with an increase in the quantity of case-level evidence that was curated per paper. This study provided a number of key points to consider when determining how often to recurate a gene-disease association.
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Affiliation(s)
- Jennifer L McGlaughon
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Jennifer L Goldstein
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Courtney Thaxton
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Sarah E Hemphill
- Laboratory for Molecular Medicine, Partners Healthcare Personalized Medicine, Cambridge, Massachusetts
| | - Jonathan S Berg
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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13
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Fan Y, Lu H, Liang W, Hu W, Zhang J, Chen YE. Krüppel-like factors and vascular wall homeostasis. J Mol Cell Biol 2018; 9:352-363. [PMID: 28992202 DOI: 10.1093/jmcb/mjx037] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 08/22/2017] [Indexed: 12/19/2022] Open
Abstract
Cardiovascular diseases (CVDs) are major causes of death worldwide. Identification of promising targets for prevention and treatment of CVDs is paramount in the cardiovascular field. Numerous transcription factors regulate cellular function through modulation of specific genes and thereby are involved in the physiological and pathophysiological processes of CVDs. Although Krüppel-like factors (KLFs) have a similar protein structure with a conserved zinc finger domain, they possess distinct tissue and cell distribution patterns as well as biological functions. In the vascular system, KLF activities are regulated at both transcriptional and posttranscriptional levels. Growing in vitro, in vivo, and genetic epidemiology studies suggest that specific KLFs play important roles in vascular wall biology, which further affect vascular diseases. KLFs regulate various functional aspects such as cell growth, differentiation, activation, and development through controlling a whole cluster of functionally related genes and modulating various signaling pathways in response to pathological conditions. Therapeutic targeting of selective KLF family members may be desirable to achieve distinct treatment effects in the context of various vascular diseases. Further elucidation of the association of KLFs with human CVDs, their underlying molecular mechanisms, and precise protein structure studies will be essential to define KLFs as promising targets for therapeutic interventions in CVDs.
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Affiliation(s)
- Yanbo Fan
- Cardiovascular Center, Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, MI, USA
| | - Haocheng Lu
- Cardiovascular Center, Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, MI, USA
| | - Wenying Liang
- Cardiovascular Center, Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, MI, USA
| | - Wenting Hu
- Cardiovascular Center, Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, MI, USA
| | - Jifeng Zhang
- Cardiovascular Center, Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, MI, USA
| | - Y Eugene Chen
- Cardiovascular Center, Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, MI, USA
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14
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Bioinformatics analysis of non-synonymous variants in the KLF genes related to cardiac diseases. Gene 2018; 650:68-76. [DOI: 10.1016/j.gene.2018.01.085] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/23/2017] [Accepted: 01/25/2018] [Indexed: 12/25/2022]
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15
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Heo SH, Jeong ES, Lee KS, Seo JH, Lee WK, Choi YK. Knockout of krüppel-like factor 10 suppresses hepatic cell proliferation in a partially hepatectomized mouse model. Oncol Lett 2017; 13:4843-4848. [PMID: 28599486 PMCID: PMC5453119 DOI: 10.3892/ol.2017.6044] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 01/26/2017] [Indexed: 12/21/2022] Open
Abstract
The liver has marked regenerative capabilities, and numerous signaling pathways are involved in liver regeneration. The transforming growth factor-β (TGF-β)/Smad pathway, which is also involved in liver regeneration, regulates numerous biological processes. Krüppel-like factor 10 (KLF10) has been reported to activate the TGF-β/Smad signaling pathway; however, the exact functions of KLF10 under various pathophysiological conditions remain unclear. In the present study, the role of KLF10 in liver regeneration following partial hepatectomy (PH) was investigated using KLF10-knockout (KO) mice. KLF10-KO mice exhibited lower liver/body weight ratios and 5-bromo-2-deoxy-uridine labeling indices compared with wild-type (WT) mice, and significant differences (P=0.028) were obtained at 72 h after PH. To understand the causes of the gross and histopathological findings, the expression levels of the components of the TGF-β/Smad pathway were examined using reverse transcription-quantitative polymerase chain reaction and western blot analysis. The mRNA and protein levels of Smad3, p15, TGF-β1 and TGF-β receptor 1 were significantly increased, while those of cMyc and cyclin D1 (proliferation-associated genes) were significantly lower in the liver tissues of the KLF10-KO mice compared with those of the WT mice at 72 h post-PH. These results indicated that KLF10-KO may exhibit antiproliferative effects on liver regeneration following PH, through strengthening the TGF-β/Smad signaling pathway in a delayed manner.
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Affiliation(s)
- Seung-Ho Heo
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, Seoul 05029, Republic of Korea
- Asan Institute for Life Sciences, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
| | - Eui-Suk Jeong
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, Seoul 05029, Republic of Korea
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 41061, Republic of Korea
| | - Kyoung-Sun Lee
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, Seoul 05029, Republic of Korea
- Laboratory Animal Center, Osong Medical Innovation Foundation, Chungbuk 28160, Republic of Korea
| | - Jin-Hee Seo
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, Seoul 05029, Republic of Korea
- Laboratory Animal Facility, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Republic of Korea
| | - Woon-Kyu Lee
- Laboratory of Developmental Genetics, College of Medicine, Inha University, Incheon 22212, Republic of Korea
| | - Yang-Kyu Choi
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, Seoul 05029, Republic of Korea
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16
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TIEG1 deficiency confers enhanced myocardial protection in the infarcted heart by mediating the Pten/Akt signalling pathway. Int J Mol Med 2017; 39:569-578. [PMID: 28204828 PMCID: PMC5360358 DOI: 10.3892/ijmm.2017.2889] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 01/19/2017] [Indexed: 12/15/2022] Open
Abstract
The transforming growth factor (TGF)-β-inducible early gene-1 (TIEG1) plays a crucial role in modulating cell apoptosis and proliferation in a number of diseases, including pancreatic cancer, leukaemia and osteoporosis. However, the functional role of TIEG1 in the heart has not been fully defined. In this study, we first investigated the role of TIEG1 in ischaemic heart disease. For in vitro experiments, cardiomyocytes were isolated from both TIEG1 knockout (KO) and wile-type (WT) mice, and the apoptotic ratios were evaluated after a 48-h ischaemic insult. A cell proliferation assay was performed after 7 days of incubation under normoxic conditions. In addition, the angiogenic capacity of endothelial cells was determined by tube formation assay. For in vivo experiments, a model of myocardial infarction (MI) was established using both TIEG1 KO and WT mice. Echocardiography was performed at 3 and 28 days post-MI, whereas the haemodynamics test was performed 28 days post-MI. Histological analyses of apoptosis, proliferation, angiogenesis and infarct zone assessments were performed using terminal deoxynucleotidyltransferase-mediated dUTP nick-end labelling (TUNEL) staining, BrdU immunostaining, α-smooth muscle actin (α-SMA)/CD31 immunostaining and Masson's trichrome staining, respectively. Changes in the expression of related proteins caused by TIEG1 deficiency were confirmed using both reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and western blot analysis. Our results demonstrated that the absence of TIEG1 prevented cardiomyocytes from undergoing apoptosis and promoted higher proliferation; it stimulated the proliferation of endothelial cells in vitro and in vivo. Improved cardiac function and less scar formation were observed in TIEG1 KO mice, and we also observed the altered expression of phosphatase and tensin homolog (Pten), Akt and Bcl-2/Bax, as well as vascular endothelial growth factor (VEGF). On the whole, our findings indicate that the absence of TIEG1 plays a cardioprotective role in ischaemic heart disease by promoting changes in Pten/Akt signalling.
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17
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TIEG1 Represses Smad7-Mediated Activation of TGF-β1/Smad Signaling in Keloid Pathogenesis. J Invest Dermatol 2017; 137:1051-1059. [PMID: 28108300 DOI: 10.1016/j.jid.2016.12.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 12/14/2016] [Accepted: 12/19/2016] [Indexed: 01/16/2023]
Abstract
Transforming growth factor-β (TGF-β)/Smad signaling plays a key role in excessive fibrosis and keloid formations. Smad7 is a negative feedback regulator that prevents activation of TGF-β/Smad signaling. However, the regulatory mechanism for Smad7 in the keloid pathogenic process remains elusive. Here, we show that expression of TIEG1 is markedly higher in keloid fibroblasts, whereas protein, mRNA, and promoter activity levels of Smad7 are decreased. When TIEG1 was knocked down with small interfering RNA, both the promoter activity and protein expression of Smad7 were increased, whereas collagen production and the proliferation, migration, and invasion of keloid fibroblasts were decreased. In contrast, TIEG1 overexpression led to a decrease in Smad7 expression and Smad7 promoter activity. Upon TGF-β1 stimulation, TIEG1 promoted Smad2 phosphorylation by down-regulating Smad7. Luciferase reporter assays and chromatin immunoprecipitation assays further showed that TIEG1 can directly bind a GC-box/Sp1 site located between nucleotides -1392 and -1382 in the Smad7 promoter to repress Smad7 promoter activity. Taken together, these findings show that TIEG1 is highly expressed in human keloids and that it directly binds and represses Smad7 promoter-mediated activation of TGF-β/Smad2 signaling, thus providing clues for development of TIEG1 blocking strategies for therapy or prophylaxis of keloids.
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18
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Chen G, Xu C, Cen M. RETRACTED ARTICLE: TIEG1 suppression enhances the therapeutic efficacy of human adipose-derived mesenchymal stem cells in myocardial infarct repair. Heart Vessels 2016; 31:2080. [PMID: 27480878 DOI: 10.1007/s00380-016-0878-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 07/22/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Guofan Chen
- Department of Cardiology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang, China
| | - Changfu Xu
- Department of Cardiology, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Mingqiu Cen
- Department of Cardiology, Xixi Hospital of Hangzhou, No. 2, Hengfu Road, Hangzhou, 310023, Zhejiang, China.
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19
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Papadakis KA, Krempski J, Svingen P, Xiong Y, Sarmento OF, Lomberk GA, Urrutia RA, Faubion WA. Krüppel-like factor KLF10 deficiency predisposes to colitis through colonic macrophage dysregulation. Am J Physiol Gastrointest Liver Physiol 2015; 309:G900-9. [PMID: 26472224 PMCID: PMC4669350 DOI: 10.1152/ajpgi.00309.2015] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 10/13/2015] [Indexed: 01/31/2023]
Abstract
Krüppel-like factor (KLF)-10 is an important transcriptional regulator of TGF-β1 signaling in both CD8(+) and CD4(+) T lymphocytes. In the present study, we demonstrate a novel role for KLF10 in the regulation of TGFβRII expression with functional relevance in macrophage differentiation and activation. We first show that transfer of KLF10(-/-) bone marrow-derived macrophages into wild-type (WT) mice leads to exacerbation of experimental colitis. At the cell biological level, using two phenotypic strategies, we show that KLF10-deficient mice have an altered colonic macrophage phenotype with higher frequency of proinflammatory LyC6(+)MHCII(+) cells and a reciprocal decrease of the anti-inflammatory LyC6(-)MHCII(+) subset. Additionally, the anti-inflammatory CD11b(+)CX3CR1(hi) subset of colonic macrophages is significantly decreased in KLF10(-/-) compared with WT mice under inflammatory conditions. Molecularly, CD11b(+) colonic macrophages from KLF10(-/-) mice exhibit a proinflammatory cytokine profile with increased production of TNF-α and lower production of IL-10 in response to LPS stimulation. Because KLF10 is a transcription factor, we explored how this protein may regulate macrophage function. Consequently, we analyzed the expression of TGFβRII expression in colonic macrophages and found that, in the absence of KLF10, macrophages express lower levels of TGFβRII and display an attenuated Smad-2 phosphorylation following TGF-β1 stimulation. We further show that KLF10 directly binds to the TGFβRII promoter in macrophages, leading to enhanced gene expression through histone H3 acetylation. Collectively, our data reveal a critical role for KLF10 in the epigenetic regulation of TGFβRII expression in macrophages and the acquisition of a "regulatory" phenotype that contributes to intestinal mucosal homeostasis.
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Affiliation(s)
| | - James Krempski
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota; and
| | - Phyllis Svingen
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota; and
| | - Yuning Xiong
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota; and
| | - Olga F Sarmento
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota; and
| | - Gwen A Lomberk
- Epigenetics and Chromatin Dynamics Laboratory, Departments of Medicine and Biochemistry and Molecular Biology, Epigenetic Translational Program, Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota
| | - Raul A Urrutia
- Epigenetics and Chromatin Dynamics Laboratory, Departments of Medicine and Biochemistry and Molecular Biology, Epigenetic Translational Program, Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota
| | - William A Faubion
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota; and
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20
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HEO SEUNGHO, JEONG EUISUK, LEE KYOUNGSUN, SEO JINHEE, LEE WOONKYU, CHOI YANGKYU. Krüppel-like factor 10 null mice exhibit lower tumor incidence and suppressed cellular proliferation activity following chemically induced liver tumorigenesis. Oncol Rep 2015; 33:2037-44. [DOI: 10.3892/or.2015.3801] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 01/16/2015] [Indexed: 11/06/2022] Open
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21
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Chin MT. Ascending KLFs in cardiovascular biology. Trends Cardiovasc Med 2015; 25:288-90. [PMID: 25592239 DOI: 10.1016/j.tcm.2014.12.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 12/02/2014] [Accepted: 12/03/2014] [Indexed: 01/01/2023]
Affiliation(s)
- Michael T Chin
- Division of Cardiology, Department of Medicine, University of Washington, Seattle, WA.
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22
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Prosdocimo DA, Sabeh MK, Jain MK. Kruppel-like factors in muscle health and disease. Trends Cardiovasc Med 2014; 25:278-87. [PMID: 25528994 DOI: 10.1016/j.tcm.2014.11.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 11/13/2014] [Accepted: 11/13/2014] [Indexed: 12/22/2022]
Abstract
Kruppel-like factors (KLF) are zinc-finger DNA-binding transcription factors that are critical regulators of tissue homeostasis. Emerging evidence suggests that KLFs are critical regulators of muscle biology in the context of cardiovascular health and disease. The focus of this review is to provide an overview of the current state of knowledge regarding the physiologic and pathologic roles of KLFs in the three lineages of muscle: cardiac, smooth, and skeletal.
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Affiliation(s)
- Domenick A Prosdocimo
- Case Cardiovascular Research Institute, Cleveland, OH; Harrington Heart & Vascular Institute, Cleveland, OH; Department of Medicine, University Hospitals Case Medical Center, Cleveland, OH; Case Western Reserve University School of Medicine and University Hospitals Case Medical Center, Cleveland, OH
| | - M Khaled Sabeh
- Case Cardiovascular Research Institute, Cleveland, OH; Harrington Heart & Vascular Institute, Cleveland, OH; Department of Medicine, University Hospitals Case Medical Center, Cleveland, OH; Case Western Reserve University School of Medicine and University Hospitals Case Medical Center, Cleveland, OH
| | - Mukesh K Jain
- Case Cardiovascular Research Institute, Cleveland, OH; Harrington Heart & Vascular Institute, Cleveland, OH; Department of Medicine, University Hospitals Case Medical Center, Cleveland, OH; Case Western Reserve University School of Medicine and University Hospitals Case Medical Center, Cleveland, OH.
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23
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Geske JB, Bos JM, Gersh BJ, Ommen SR, Eidem BW, Ackerman MJ. Deformation patterns in genotyped patients with hypertrophic cardiomyopathy. Eur Heart J Cardiovasc Imaging 2013; 15:456-65. [PMID: 24217980 DOI: 10.1093/ehjci/jet234] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AIMS Echocardiographic strain imaging with two-dimensional speckle tracking is an emerging tool for defining cardiac function and identifying preclinical hypertrophic cardiomyopathy (HCM). In HCM, a reverse septal contour is a strong predictor of mutation positive sarcomeric HCM. The objective of this study was to determine whether left ventricular (LV) deformation patterns can differentiate between genotype positive and negative patients within a large HCM cohort. METHODS AND RESULTS One hundred and thirty one patients (89 males, age 55 ± 15 years) with clinically diagnosed HCM underwent comprehensive transthoracic echocardiography inclusive of LV strain imaging, LV dimensions and ejection fraction, septal contour and thickness, and identification of obstructive physiology. Longitudinal peak systolic strain was assessed from 17 LV myocardial segments blinded to the patient's genetic test results derived from comprehensive genotyping of nine myofilament HCM-associated genes. Genotyping revealed that 51 of 131 patients (39%) were mutation positive for sarcomeric/myofilament-HCM (genotype positive). Regional strain was lower in genotype-positive patients in mid inferoseptal (P = 0.004), basal anteroseptal (P = 0.04), and basal inferoseptal segments (P = 0.002) compared with HCM patients lacking a mutation (genotype negative). Strain patterns in reverse-curve, genotype-positive HCM differed significantly from genotype negative, sigmoidal HCM in multiple segments. However, when comparing genotype-negative and genotype-positive patients with the same septal morphology, there were no significant regional strain differences. Septal thickness positively correlated with global and basal anteroseptal longitudinal strain (r = 0.34 and r = 0.54, respectively, P < 0.0001). CONCLUSION Significant regional strain differences in genotyped HCM patients are dependent upon septal morphology or thickness, not genotype. Phenotypic expression of deformation patterns appears heterogeneous.
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