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Bamaga A, Muthaffar O, Alyazidi A, Bahowarth S, Shawli M, Alotibi F, Alsehemi M, Almohammal M, Alawwadh A, Alghamdi N. MED23 pathogenic variant: genomic-phenotypic analysis. J Med Life 2024; 17:500-507. [PMID: 39144687 PMCID: PMC11320618 DOI: 10.25122/jml-2024-0065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 05/02/2024] [Indexed: 08/16/2024] Open
Abstract
The mediator complex subunit 23 (MED23) gene encodes a protein that acts as a tail module mediator complex, a multi-subunit co-activator involved in several cellular activities. MED23 has been shown to have substantial roles in myogenesis and other molecular mechanisms. The functions of MED23 in the neurological system remain unclear and the clinical phenotype is not thoroughly described. Whole exome sequencing was used to identify a novel mutation in the MED23 gene. DNA capture probes using next-generation sequencing-based copy number variation analysis with Illumina array were performed. The clinical, demographic, neuroimaging, and electrophysiological data of the patients were collected, and similarly, the data of all reported cases in the literature were extracted to compare findings. Screening a total of 9,662 articles, we identified 22 main regulatory processes for the MED23 gene, including suppressive activity for carcinogenic processes. MED23 is also involved in the brain's neurogenesis and functions. The identified cases mainly presented with intellectual disability (87.5%) and developmental delay (50%). Seizures were present in only 18.75% of the patients. Slow backgrounds and spike and sharp-wave complexes were reported on the electroencephalogram (EEG) of a few patients and delayed myelination, thin corpus callosum, and pontine hypoplasia on magnetic resonance imaging (MRI). The MED23 gene regulates several processes in which its understanding promotes considerable therapeutic potential for patients. It is crucial to consider genetic and laboratory testing, particularly when encountering potential carriers. Intellectual disability and developmental delay are the most notable clinical signs with heterogeneous features on EEG and MRI.
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Affiliation(s)
- Ahmed Bamaga
- Department of Pediatrics, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
- Neuromuscular Medicine Unit, Department of Pediatrics, Faculty of Medicine, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | - Osama Muthaffar
- Department of Pediatrics, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Anas Alyazidi
- Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sarah Bahowarth
- Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammed Shawli
- Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Fahad Alotibi
- Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Matar Alsehemi
- Pediatric Neurology Unit, Department of Pediatrics, King Fahad Hospital, Albaha, Saudi Arabia
| | | | - Adel Alawwadh
- Department of Pediatrics, Khamis Mushait Maternity and Children Hospital, Abha, Saudi Arabia
| | - Njood Alghamdi
- Faculty of Medicine, Albaha University, Albaha, Saudi Arabia
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Fu X, Liu S, Cao D, Li C, Ji H, Wang G. Med23 deficiency reprograms the tumor microenvironment to promote lung tumorigenesis. Br J Cancer 2024; 130:716-727. [PMID: 38195889 PMCID: PMC10912217 DOI: 10.1038/s41416-023-02556-9] [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: 07/04/2023] [Revised: 12/08/2023] [Accepted: 12/13/2023] [Indexed: 01/11/2024] Open
Abstract
BACKGROUND Lung cancer is the leading cause of cancer-related death worldwide. We previously found that Mediator complex subunit 23 (MED23) is important for the tumourigenicity of lung cancer cells with hyperactive Ras activity in vitro, although the in vivo function of MED23 in lung tumourigenesis remains to be explored. METHODS In this study, we utilized well-characterized KrasG12D-driven non-small cell lung cancer mouse model to investigate the role of MED23 in lung cancer. The lung tumour progression was evaluated by H&E and IHC analysis. Western blotting and qRT-PCR assays were performed to detect changes in gene expression. Immune cells were analyzed by FACS technology. RNA-seq and reporter assays were conducted to explore the mechanism. RESULTS We observed that lung epithelial Med23 deletion by adeno-Cre resulted in a significant increase in KrasG12D tumour number and size, which was further verified with another mouse model with Med23 specifically deleted in alveolar type II cells. Mice with lung-specific Med23 deficiency also exhibited accelerated tumourigenesis, and a higher proliferation rate for tumour cells, along with increased ERK phosphorylation. Notably, the numbers of infiltrating CD4+ T cells and CD8+ T cells were significantly reduced in the lungs of Med23-deficient mice, while the numbers of myeloid-derived suppressor cells (MDSCs) and Treg cells were significantly increased, suggesting the enhanced immune escape capability of the Med23-deficient lung tumours. Transcriptomic analysis revealed that the downregulated genes in Med23-deficient lung tumour tissues were associated with the immune response. Specifically, Med23 deficiency may compromise the MHC-I complex formation, partially through down-regulating B2m expression. CONCLUSIONS Collectively, these findings revealed that MED23 may negatively regulate Kras-induced lung tumourigenesis in vivo, which would improve the precise classification of KRAS-mutant lung cancer patients and provide new insights for clinical interventions.
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Affiliation(s)
- Xiaobo Fu
- State Key Laboratory of Genetic Engineering, School of Life Sciences and Zhongshan Hospital, Fudan University, Shanghai, 200438, China
| | - Siming Liu
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Dan Cao
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Chonghui Li
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Hongbin Ji
- State Key Laboratory of Cell Biology, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Gang Wang
- State Key Laboratory of Genetic Engineering, School of Life Sciences and Zhongshan Hospital, Fudan University, Shanghai, 200438, China.
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Jiao K, Yang K, Wang J, Ni Y, Hu C, Liu J, Zhou M, Zheng J, Li Z. 27-Hydroxycholesterol induces liver fibrosis via down-regulation of trimethylation of histone H3 at lysine 27 by activating oxidative stress; effect of nutrient interventions. Free Radic Biol Med 2024; 210:462-477. [PMID: 38056577 DOI: 10.1016/j.freeradbiomed.2023.11.043] [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: 09/27/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 12/08/2023]
Abstract
BACKGROUND Chronic liver injury caused by activation of hepatic stellate cells (HSCs) is a key event in the development of liver fibrosis (LF). A high-cholesterol diet can prompt accumulation of free cholesterol in HSCs, which promotes HSC activation and progression of LF. OBJECTIVE 27-Hydroxycholesterol (27HC) is the most abundant cholesterol metabolite. Here, we investigated whether the HSC activation and LF induced by high cholesterol is caused by its metabolite 27HC, and whether TGFβ classical signaling were involved in these processes. METHODS In vitro, LX2 and HSC-T6 cells were used to explore the effects of 27HC on activation of HSCs, while LSECs were used to observe the effects of 27HC on capillarization. In vivo, zebrafish were used to assess the effect of 27HC on LF. RESULTS The cholesterol metabolite 27HC promoted the proliferation of HSCs and up-regulated expression of COL-1 and α-SMA as well as CTGF and TIMP1. Also, 27HC up-regulated expression of Smad2/3 and phosphorylated Smad2/3 in HSCs. Furthermore, 27HC-induced up-regulation of COL-1, α-SMA, CTGF, and TIMP1 protein levels was inhibited by Smad2/3 knockout. In addition, 27HC down-regulated H3K27me3 by inhibition of EZH2 and promotion of UTX and JMJD3 expression via the TGFβ signaling, thereby inducing activation of HSCs. Notably, 27HC significantly aggravated the pathological damage induced by DEN, and induced deposition of collagen fibers in zebrafish liver. Folic acid (FA) and resveratrol (RES) both reduced 27HC-induced production of reactive oxygen species (ROS) and inhibited the effects of TGFβ signaling on EZH2, UTX, and JMJD3, thereby increasing H3K27me3, and finally jointly inhibiting LF. CONCLUSION Cholesterol is metabolized to 27HC, which mediates activation of HSCs and onset of LF. Reduced expression of H3k27me3 by TGFβ signaling is crucial to 27HC-induced LF. FA and RES ameliorated activation of HSCs and LF by reducing 27HC-induced production of ROS and regulating of H3K27me3.
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Affiliation(s)
- Kailin Jiao
- Department of Nutrition, The Second Affiliated Hospital, Air Force Medical University, Xi'an, China
| | - Keke Yang
- Nanjing Municipal Center for Disease Control and Prevention, Nanjing, China
| | - Jie Wang
- Department of Nutrition and Food Hygiene, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Yifan Ni
- Department of Nutrition and Food Hygiene, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Chunyan Hu
- Department of Nutrition and Food Hygiene, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Jiao Liu
- Department of Nutrition, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou, China
| | - Ming Zhou
- Department of Nutrition and Food Hygiene, School of Public Health, Nanjing Medical University, Nanjing, China.
| | - Jin Zheng
- Department of Traditional Chinese Medicine, The Second Affiliated Hospital, Air Force Medical University, Xi'an, China.
| | - Zhong Li
- Department of Nutrition and Food Hygiene, School of Public Health, Nanjing Medical University, Nanjing, China.
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Ilchuk LA, Kubekina MV, Okulova YD, Silaeva YY, Tatarskiy VV, Filatov MA, Bruter AV. Genetically Engineered Mice Unveil In Vivo Roles of the Mediator Complex. Int J Mol Sci 2023; 24:ijms24119330. [PMID: 37298278 DOI: 10.3390/ijms24119330] [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: 04/28/2023] [Revised: 05/16/2023] [Accepted: 05/24/2023] [Indexed: 06/12/2023] Open
Abstract
The Mediator complex is a multi-subunit protein complex which plays a significant role in the regulation of eukaryotic gene transcription. It provides a platform for the interaction of transcriptional factors and RNA polymerase II, thus coupling external and internal stimuli with transcriptional programs. Molecular mechanisms underlying Mediator functioning are intensively studied, although most often using simple models such as tumor cell lines and yeast. Transgenic mouse models are required to study the role of Mediator components in physiological processes, disease, and development. As constitutive knockouts of most of the Mediator protein coding genes are embryonically lethal, conditional knockouts and corresponding activator strains are needed for these studies. Recently, they have become more easily available with the development of modern genetic engineering techniques. Here, we review existing mouse models for studying the Mediator, and data obtained in corresponding experiments.
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Affiliation(s)
- Leonid A Ilchuk
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia
| | - Marina V Kubekina
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia
| | - Yulia D Okulova
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia
| | - Yulia Yu Silaeva
- Institute of Gene Biology, Russian Academy of Sciences, 34/5 Vavilov Street, 119334 Moscow, Russia
| | - Victor V Tatarskiy
- Institute of Gene Biology, Russian Academy of Sciences, 34/5 Vavilov Street, 119334 Moscow, Russia
| | - Maxim A Filatov
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia
| | - Alexandra V Bruter
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia
- Federal State Budgetary Institution "N.N. Blokhin National Medical Research Center of Oncology", Ministry of Health of the Russian Federation, Kashirskoe Sh. 24, 115478 Moscow, Russia
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Li Y, He XL, Zhou LP, Huang XZ, Li S, Guan S, Li J, Zhang L. Asiatic acid alleviates liver fibrosis via multiple signaling pathways based on integrated network pharmacology and lipidomics. Eur J Pharmacol 2022; 931:175193. [PMID: 35963324 DOI: 10.1016/j.ejphar.2022.175193] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 07/30/2022] [Accepted: 08/05/2022] [Indexed: 11/30/2022]
Abstract
Liver fibrosis is characterized by the abnormal deposition of the extracellular matrix with a severe inflammatory response and/or metabolic disorder. Asiatic acid (AA), a natural compound derived from Centella asiatica, exhibited potent anti-fibrosis effects. This investigation first confirmed the anti-fibrosis effects of AA in TGF-β-LX-2 cells and CCl4-induced liver fibrosis mice, and then sought to elucidate a novel mechanism of action by integrating network pharmacology and lipidomics. Network pharmacology was used to find potential targets of AA, while lipidomics was used to identify differential metabolites between fibrosis and recovered cohorts. AA could suppress hepatic stellate cell activation in vitro and improve liver fibrosis in vivo. Network pharmacology unveiled the genes involved in pathways in cancer, peroxisome proliferators-activated receptors signaling pathway, and arachidonic acid metabolism pathway. Furthermore, five key genes were found in the both human and mouse databases, indicating that arachidonic acid metabolism was important. Changes in lyso-phosphocholine (22:5), prostaglandin F2α, and other related lipid metabolites also suggested the involvement of arachidonic acid metabolism the anti-fibrotic effect. In summary, our integrated strategies demonstrated that AA targeted multiple targets and impeded the progression of liver fibrosis by ameliorating arachidonic acid metabolism.
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Affiliation(s)
- Yong Li
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, PR China; Department of Pharmacology & Toxicology, Guangdong Sunshine Lake Pharma Co. Ltd, Dongguan, 523000, PR China
| | - Xu-Lin He
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, PR China
| | - Li-Ping Zhou
- Evaluation and Monitoring Center of Occupational Health, Guangzhou Twelfth People's Hospital, Guangzhou, 510006, PR China.
| | - Xiao-Zhong Huang
- Department of Pharmacology & Toxicology, Guangdong Sunshine Lake Pharma Co. Ltd, Dongguan, 523000, PR China
| | - Shan Li
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, PR China
| | - Su Guan
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, PR China
| | - Jing Li
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, PR China
| | - Lei Zhang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, PR China.
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Wu S, Li Q, Cao Y, Luo S, Wang Z, Zhang T. Mediator complex subunit 8 is a prognostic biomarker in hepatocellular carcinoma. Am J Transl Res 2022; 14:1765-1777. [PMID: 35422940 PMCID: PMC8991165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 02/16/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Mediator complex subunit 8 (MED8) is known for its role in encoding a subunit of the mediator complex (MED), that is critical for transcription. MED8 is significantly expressed in various tumors and has been correlated with an unfavorable prognosis. Nevertheless, no relationships have been found between MED8 and the clinical characteristics of hepatocellular carcinoma (HCC). METHODS To conduct an evaluation of correlations between clinicopathologic characteristics and MED8 expression, the logistic regression, Wilcoxon signed-rank test, and Kruskal-Wallis test were used. To perform analysis of factors contributing to prognosis, the Kaplan-Meier approach and the Cox regression analyses were used. A nomogram on the basis of a Cox multivariate analysis was employed to anticipate the influence of MED8 on patient prognosis. The receiver operating characteristic (ROC) curves were plotted and the areas under the curve (AUC) were calculated to assess the prognostic value of MED8. Both immune infiltration analysis and Gene Set Enrichment Analysis (GSEA) were applied to reveal significant enrichment differences among TCGA data. Quantitative RT-PCR (qRT-PCR) and western blotting were used to verify the difference in the expression of MED8 in normal and hepatocellular carcinoma cells. The immunohistochemical method was used to validate the MED8 expression in tumor and adjoining tissues of HCC patients. RESULTS A univariate analysis showed that high MED8 expression predicts poor disease-specific survival (DSS) (HR: 2.57; 95% confidence interval (CI) 1.62, 4.07; P<0.001). Multivariate regression analysis showed that high MED8 (adjusted HR: 3.032 (1.817, 5.060); P<0.001) expression and M stage (adjusted HR=4.075 (1.179-14.091) for M1 vs. M0, P=0.026) served as prognostic indicators of unfavorable overall survival in an independent manner in patients with HCC. The C-index for the nomogram was 0.732 (95% CI: 0.698, 0.766) and the AUC of MED8 was 0.817 (95% CI: 0.778, 0.857). Functional analysis showed that the cell cycle checkpoints, p53 dependent G1-DNA damage response, mitotic G1-G1-S phases, and mitotic G2-G2-M phases, were significantly enriched in DEGs associated with MED8 expression. Th2 cells were positively correlated with MED8 expression. CONCLUSIONS MED8 predicts poor prognosis in HCC, possibly through modulating the cell cycle and Th2 cells.
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Affiliation(s)
- Shuang Wu
- Clinical Laboratory, The Affiliated Children Hospital of Xi’an Jiaotong UniversityXi’an, Shaanxi, China
| | - Qiao Li
- Clinical Laboratory, The Affiliated Children Hospital of Xi’an Jiaotong UniversityXi’an, Shaanxi, China
| | - Yuan Cao
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Xi’an Jiaotong University (Xibei Hospital)Xi’an, Shaanxi, China
| | - Senyuan Luo
- Department of Pathology, Taihe Hospital, Hubei Medical UniversityShiyan, Hubei, China
| | - Zengguo Wang
- Clinical Laboratory, The Affiliated Children Hospital of Xi’an Jiaotong UniversityXi’an, Shaanxi, China
| | - Taoyuan Zhang
- Department of Anesthesiology, Rizhao International Heart HospitalRizhao, Shandong, China
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Tan C, Zhu S, Chen Z, Liu C, Li YE, Zhu M, Zhang Z, Zhang Z, Zhang L, Gu Y, Liang Z, Boyer TG, Ouyang K, Evans SM, Fang X. Mediator complex proximal Tail subunit MED30 is critical for Mediator core stability and cardiomyocyte transcriptional network. PLoS Genet 2021; 17:e1009785. [PMID: 34506481 PMCID: PMC8432849 DOI: 10.1371/journal.pgen.1009785] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 08/18/2021] [Indexed: 01/28/2023] Open
Abstract
Dysregulation of cardiac transcription programs has been identified in patients and families with heart failure, as well as those with morphological and functional forms of congenital heart defects. Mediator is a multi-subunit complex that plays a central role in transcription initiation by integrating regulatory signals from gene-specific transcriptional activators to RNA polymerase II (Pol II). Recently, Mediator subunit 30 (MED30), a metazoan specific Mediator subunit, has been associated with Langer-Giedion syndrome (LGS) Type II and Cornelia de Lange syndrome-4 (CDLS4), characterized by several abnormalities including congenital heart defects. A point mutation in MED30 has been identified in mouse and is associated with mitochondrial cardiomyopathy. Very recent structural analyses of Mediator revealed that MED30 localizes to the proximal Tail, anchoring Head and Tail modules, thus potentially influencing stability of the Mediator core. However, in vivo cellular and physiological roles of MED30 in maintaining Mediator core integrity remain to be tested. Here, we report that deletion of MED30 in embryonic or adult cardiomyocytes caused rapid development of cardiac defects and lethality. Importantly, cardiomyocyte specific ablation of MED30 destabilized Mediator core subunits, while the kinase module was preserved, demonstrating an essential role of MED30 in stability of the overall Mediator complex. RNAseq analyses of constitutive cardiomyocyte specific Med30 knockout (cKO) embryonic hearts and inducible cardiomyocyte specific Med30 knockout (icKO) adult cardiomyocytes further revealed critical transcription networks in cardiomyocytes controlled by Mediator. Taken together, our results demonstrated that MED30 is essential for Mediator stability and transcriptional networks in both developing and adult cardiomyocytes. Our results affirm the key role of proximal Tail modular subunits in maintaining core Mediator stability in vivo.
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Affiliation(s)
- Changming Tan
- Department of Medicine, University of California, San Diego, California, United States of America
- Department of Cardiovascular Surgery, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Siting Zhu
- Department of Medicine, University of California, San Diego, California, United States of America
- Department of Cardiovascular Surgery, Peking University Shenzhen Hospital, School of Chemical Biology and Biotechnology, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Zee Chen
- Department of Medicine, University of California, San Diego, California, United States of America
- Department of Cardiovascular Surgery, Peking University Shenzhen Hospital, School of Chemical Biology and Biotechnology, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Canzhao Liu
- Department of Medicine, University of California, San Diego, California, United States of America
| | - Yang E. Li
- Department of Medicine, University of California, San Diego, California, United States of America
| | - Mason Zhu
- Department of Medicine, University of California, San Diego, California, United States of America
| | - Zhiyuan Zhang
- Department of Medicine, University of California, San Diego, California, United States of America
- Department of Cardiovascular Surgery, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhiwei Zhang
- Department of Medicine, University of California, San Diego, California, United States of America
- Department of Cardiovascular Surgery, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Lunfeng Zhang
- Department of Medicine, University of California, San Diego, California, United States of America
| | - Yusu Gu
- Department of Medicine, University of California, San Diego, California, United States of America
| | - Zhengyu Liang
- Department of Medicine, University of California, San Diego, California, United States of America
| | - Thomas G. Boyer
- Department of Molecular Medicine, University of Texas Health Science Center, San Antonio, Texas, United States of America
| | - Kunfu Ouyang
- Department of Cardiovascular Surgery, Peking University Shenzhen Hospital, School of Chemical Biology and Biotechnology, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Sylvia M. Evans
- Department of Medicine, University of California, San Diego, California, United States of America
- Department of Pharmacology, University of California, San Diego, California, United States of America
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, California, United States of America
| | - Xi Fang
- Department of Medicine, University of California, San Diego, California, United States of America
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Du Z, Liu M, Wang Z, Lin Z, Feng Y, Tian D, Xia L. EZH2-mediated inhibition of KLF14 expression promotes HSCs activation and liver fibrosis by downregulating PPARγ. Cell Prolif 2021; 54:e13072. [PMID: 34031939 PMCID: PMC8249795 DOI: 10.1111/cpr.13072] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 04/21/2021] [Accepted: 04/26/2021] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVES Induction of deactivation and apoptosis of hepatic stellate cells (HSCs) are principal therapeutic strategies for liver fibrosis. Krüppel-like factor 14 (KLF14) regulates various biological processes, however, roles, mechanisms and implications of KLF14 in liver fibrosis are unknown. MATERIALS AND METHODS KLF14 expression was detected in human, rat and mouse fibrotic models, and its effects on HSCs were assessed. Chromatin immunoprecipitation assays were utilized to investigate the binding of KLF14 to peroxisome proliferator-activated receptor γ (PPARγ) promoter, and the binding of enhancer of zeste homolog 2 (EZH2) to KLF14 promoter. In vivo, KLF14-overexpressing adenovirus was injected via tail vein to thioacetamide (TAA)-treated rats to investigate the role of KLF14 in liver fibrosis progression. EZH2 inhibitor EPZ-6438 was utilized to treat TAA-induced rat liver fibrosis. RESULTS KLF14 expression was remarkably decreased in human, rat and mouse fibrotic liver tissues. Overexpression of KLF14 increased LD accumulation, inhibited HSCs activation, proliferation, migration and induced G2/M arrest and apoptosis. Mechanistically, KLF14 transactivated PPARγ promoter activity. Inhibition of PPARγ blocked the suppressive role of KLF14 overexpression in HSCs. Downregulation of KLF14 in activated HSCs was mediated by EZH2-regulated histone H3 lysine 27 trimethylation. Adenovirus-mediated KLF14 overexpression ameliorated TAA-induced rat liver fibrosis in PPARγ-dependent manner. Furthermore, EPZ-6438 dramatically alleviated TAA-induced rat liver fibrosis. Importantly, KLF14 expression was decreased in human with liver fibrosis, which was significantly correlated with EZH2 upregulation and PPARγ downregulation. CONCLUSIONS KLF14 exerts a critical anti-fibrotic role in liver fibrosis, and targeting the EZH2/KLF14/PPARγ axis might be a novel therapeutic strategy for liver fibrosis.
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Affiliation(s)
- Zhipeng Du
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Mei Liu
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhihui Wang
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhuoying Lin
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yangyang Feng
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dean Tian
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Limin Xia
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Li Z, Cao H, Yao M, Lei X. Effect of acupuncture combined with Shenqi Yigan Decoction on liver function and T cell subsets in patients with HBV-induced liver fibrosis. Am J Transl Res 2021; 13:3409-3417. [PMID: 34017516 PMCID: PMC8129288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 12/04/2020] [Indexed: 06/12/2023]
Abstract
OBJECTIVE To explore the effect of acupuncture combined with Shenqi Yigan Decoction on liver function and T cell subsets in patients with Hepatitis B virus-induced liver fibrosis. METHODS All of the 90 patients with HBV-induced liver fibrosis were divided into two groups with the control group (n=45) treated with the conventional treatment, and the observation group (n=45) treated with acupuncture and Shenqi Yigan decoction based on the observation group. The seroconversion rate of hepatitis Be antigen (HBeAg), the liver function, the serum indexes of liver fibrosis of hyaluronic acid (HA), laminin (LN), type III procollagen (PC III), type IV collagen (IV-C), the T cell subsets and the inflammatory factors were compared between the two groups. RESULTS After 2 and 4 months of treatment, the HBeAg seroconversion rate of patients in the observation group was higher than that of the control group, but the difference was not significant (P>0.05). And the HBeAg seroconversion rate of patients in the observation group was significantly higher than that of the control group after 6 months treatment (P<0.05). After treatment, the serum levels of the liver function index of aspartate aminotransferase (AST), alanine aminotransferase (ALT), total bilirubin (Tbil), the liver fibrosis index of HA, LN, PC III, and the inflammatory factor of type IV collagen (IV-C), C-reactive protein (CRP) and tumor necrosis factor-α (TNF-α) in the two groups were lower than those before treatment, in addition, the levels of there index were lower in the observation group (all P<0.05). After treatment, the proportion of CD3+, CD4+ T lymphocyte subsets and CD4+/CD8+ in peripheral blood of the two groups were increased, and the proportion of CD8+ was decreased. The change range of the observation group was larger than that of the observation group (all P<0.01). The proportion of patients with liver fibrosis grade F1 in the observation group after treatment was significantly higher than that before treatment, and the proportion of patients with liver fibrosis grade F2 to F3 was significantly lower than that before treatment. There was a significant difference in liver fibrosis grade between the two groups after treatment (P<0.05). CONCLUSION The combined treatment of acupuncture and Shenqi Yigan decoction can significantly improve the liver function of patients with HBV-induced liver fibrosis, delay the progress of liver fibrosis, improve the cellular immune function and reduce the inflammatory reaction.
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Affiliation(s)
- Zonglin Li
- Department of Traditional Chinese Medicine, Affiliated Hospital of North Sichuan Medical CollegeNanchong, Sichuan Province, China
| | - Hongchun Cao
- Department of Traditional Chinese Medicine, Affiliated Hospital of North Sichuan Medical CollegeNanchong, Sichuan Province, China
| | - Ming Yao
- First Department of Internal Medicine, Nanchong Hospital of Traditional Chinese MedicineNanchong, Sichuan Province, China
| | - Xiao Lei
- Department of Traditional Chinese Medicine, Affiliated Hospital of North Sichuan Medical CollegeNanchong, Sichuan Province, China
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Ji D, Wang Q, Zhao Q, Tong H, Yu M, Wang M, Lu T, Jiang C. Co-delivery of miR-29b and germacrone based on cyclic RGD-modified nanoparticles for liver fibrosis therapy. J Nanobiotechnology 2020; 18:86. [PMID: 32513194 PMCID: PMC7281922 DOI: 10.1186/s12951-020-00645-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 06/01/2020] [Indexed: 02/08/2023] Open
Abstract
Hepatic stellate cells (HSCs) were activated and secreted excessive amounts of extracellular matrix (ECM) proteins during pathogenetic progress of liver fibrosis. Germacrone (GMO) and miR-29b can play an important role in inhibiting growth of HSCs and production of type I collagen. GMO and miR-29b were co-encapsulated into nanoparticles (NPs) based on poly(ethylene glycol)-block-poly(lactide-co-glycolide) (PEG-PLGA). Then, NPs were modified with cyclic RGD peptides (cRGDfK). cRGDfK is an effective ligand to bind integrin αvβ3 and increase the targeting ability for fibrotic liver. GMO- and miR-29b-loaded NPs exhibited great cytotoxicity to activated HSCs and significantly inhibited production of type I collagen. Liver fibrosis model of mice was induced by administration of carbon tetrachloride. Great targeting ability was achieved in liver fibrotic mice treated with cRGD-modified NPs. Significant ant-fibrotic effects have been presented based on hematoxylin and eosin (H&E), Masson and Sirius Red staining results of liver tissues collected from mice treated with drug-loaded NPs. All these results indicate GMO- and miR-29b-loaded cRGD-modified NPs have the potential for clinical use to treat liver fibrosis.
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Affiliation(s)
- De Ji
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Qiaohan Wang
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Qi Zhao
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, 325035, China.,Biomedical Collaborative Innovation Center of Zhejiang, Wenzhou, 325035, China
| | - Huangjin Tong
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, China
| | - Mengting Yu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Meng Wang
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Tulin Lu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Chengxi Jiang
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, 325035, China. .,Biomedical Collaborative Innovation Center of Zhejiang, Wenzhou, 325035, China.
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