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Cao Y, Wang X, Liu Y, Liu P, Qin J, Zhu Y, Zhai S, Jiang Y, Liu Y, Han L, Luo J, Zhang R, Shi M, Wang L, Tang X, Xue M, Liu J, Wang W, Wen C, Deng X, Peng C, Chen H, Cheng D, Jiang L, Shen B. BHLHE40 Inhibits Ferroptosis in Pancreatic Cancer Cells via Upregulating SREBF1. Adv Sci (Weinh) 2024; 11:e2306298. [PMID: 38064101 PMCID: PMC10870036 DOI: 10.1002/advs.202306298] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/14/2023] [Indexed: 02/17/2024]
Abstract
Pancreatic cancer (PCa) is one of the most fatal human malignancies. The enhanced infiltration of stromal tissue into the PCa tumor microenvironment limits the identification of key tumor-specific transcription factors and epigenomic abnormalities in malignant epithelial cells. Integrated transcriptome and epigenetic multiomics analyses of the paired PCa organoids indicate that the basic helix-loop-helix transcription factor 40 (BHLHE40) is significantly upregulated in tumor samples. Increased chromatin accessibility at the promoter region and enhanced mTOR pathway activity contribute to the elevated expression of BHLHE40. Integrated analysis of chromatin immunoprecipitation-seq, RNA-seq, and high-throughput chromosome conformation capture data, together with chromosome conformation capture assays, indicate that BHLHE40 not only regulates sterol regulatory element-binding factor 1 (SREBF1) transcription as a classic transcription factor but also links the enhancer and promoter regions of SREBF1. It is found that the BHLHE40-SREBF1-stearoyl-CoA desaturase axis protects PCa cells from ferroptosis, resulting in the reduced accumulation of lipid peroxidation. Moreover, fatostatin, an SREBF1 inhibitor, significantly suppresses the growth of PCa tumors with high expressions of BHLHE40. This study highlights the important roles of BHLHE40-mediated lipid peroxidation in inducing ferroptosis in PCa cells and provides a novel mechanism underlying SREBF1 overexpression in PCa.
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Li K, Huang Z, Liu C, Xu Y, Chen W, Shi L, Li C, Zhou F, Zhou F. Transcriptomic analysis of human pulmonary microvascular endothelial cells treated with LPS. Cell Signal 2023; 111:110870. [PMID: 37633475 DOI: 10.1016/j.cellsig.2023.110870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 08/08/2023] [Accepted: 08/23/2023] [Indexed: 08/28/2023]
Abstract
Acute respiratory distress syndrome (ARDS) has a rapid onset and progression, which lead to the severity and complexity of the primary disease and significantly increase the fatality rate of patients. Transcriptomics provides some ideas for clarifying the mechanism of ARDS, exploring prevention and treatment targets, and searching for related specific markers. In this study, RNA-Seq technology was used to observe the gene expression of human pulmonary microvascular endothelial cells (PMVECs) induced by LPS, and to excavate the key genes and signaling pathways in ARDS process. A total of 2300 up-regulated genes were detected, and a corresponding 1696 down-regulated genes were screened. Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis, and protein-protein interaction (PPI) were also used for functional annotation of key genes. TFDP1 was identified as a cell cycle-dependent differentially expressed gene, and its reduced expression was verified in LPS-treated PMVECs and lung tissues of CLP-induced mice. In addition, the inhibition of TFDP1 on inflammation and apoptosis, and the promotion of proliferation were confirmed. The decreased expression of E2F1, Rb, CDK1 and the activation of MAPK signaling pathway were substantiated in the in vivo and in vitro models of ARDS. Moreover, SREBF1 has been demonstrated to be involved in cell cycle arrest in PMVECs by inhibiting CDK1. Our study shows that transcriptomics combined with basic research can broaden the investigation of ARDS mechanisms and may provide a basis for future mechanistic innovations.
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Affiliation(s)
- Kaili Li
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, 400016 Chongqing, China.
| | - Zuotian Huang
- Department of Hepatobiliary Pancreatic Tumor Center, Chongqing University Cancer Hospital, 400030 Chongqing Municipality, China
| | - Chang Liu
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, 400016 Chongqing, China.
| | - Yuanyuan Xu
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, 400016 Chongqing, China
| | - Wei Chen
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, 400016 Chongqing, China
| | - Lu Shi
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, 400016 Chongqing, China
| | - Can Li
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, 400016 Chongqing, China
| | - Fawei Zhou
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, 400016 Chongqing, China
| | - Fachun Zhou
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, 400016 Chongqing, China; Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, 400016 Chongqing, China.
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Lin W, Liu Y, Zhang S, Xu S, Qiu Q, Wang C, Liu D, Shen C, Xu M, Shi M, Xiao Y, Chen G, Xu H, Liang L. Schisandrin treatment suppresses the proliferation, migration, invasion, and inflammatory responses of fibroblast-like synoviocytes from rheumatoid arthritis patients and attenuates synovial inflammation and joint destruction in CIA mice. Int Immunopharmacol 2023; 122:110502. [PMID: 37390648 DOI: 10.1016/j.intimp.2023.110502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 05/30/2023] [Accepted: 06/11/2023] [Indexed: 07/02/2023]
Abstract
BACKGROUND Rheumatoid arthritis (RA) is a systemic autoimmune disease causing joint dysfunction. As disease-modifying anti-rheumatic drugs (DMARDs) have poor efficacy in 20% to 25% of RA patients, additional novel RA medications are urgently needed. Schisandrin (SCH) has multiple therapeutic effects. However, whether SCH is effective against RA remains unknown. PURPOSE To investigate how SCH affects the abnormal behaviours of RA fibroblast-like synoviocytes (FLSs) and further elucidate the underlying mechanism of SCH in RA FLSs and collagen-induced arthritis (CIA) mice. METHODS Cell Counting Kit-8 (CCK8) assays were used to characterize cell viability. EdU assays were performed to assess cell proliferation. Annexin V-APC/PI assays were used to determine apoptosis. Transwell chamber assays were used to measure cell migration and invasion in vitro. RT-qPCR was used to assess proinflammatory cytokine and MMP mRNA expression. Western blotting was used to detect protein expression. RNA sequencing was performed to explore the potential downstream targets of SCH. CIA model mice were used to assess the treatment efficacy of SCH in vivo. RESULTS Treatments with SCH (50, 100, and 200 μΜ) inhibited RA FLSs proliferation, migration, invasion, and TNF-α-induced IL-6, IL-8, and CCL2 expression in a dose-dependent manner but did not affect RA FLSs viability or apoptosis. RNA sequencing and Reactome enrichment analysis indicated that SREBF1 might be the downstream target in SCH treatment. Furthermore, knockdown of SREBF1 exerted effects similar to those of SCH in inhibiting RA FLSs proliferation, migration, invasion, and TNF-α-induced expression of IL-6, IL-8, and CCL2. Both SCH treatment and SREBF1 knockdown decreased activation of the PI3K/AKT and NF-κB signalling pathways. Moreover, SCH ameliorated joint inflammation and cartilage and bone destruction in CIA model mice. CONCLUSION SCH controls the pathogenic behaviours of RA FLSs by targeting SREBF1-mediated activation of the PI3K/AKT and NF-κB signalling pathways. Our data suggest that SCH inhibits FLS-mediated synovial inflammation and joint damage and that SCH might have therapeutic potential for RA.
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Affiliation(s)
- Wei Lin
- Department of Rheumatology and Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong China
| | - Yingli Liu
- Department of Rheumatology and Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong China
| | - Shuoyang Zhang
- Department of Rheumatology and Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong China
| | - Siqi Xu
- Department of Rheumatology and Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong China
| | - Qian Qiu
- Department of Rheumatology and Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong China
| | - Cuicui Wang
- Department of Rheumatology, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong China
| | - Di Liu
- Department of Rheumatology and Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong China
| | - Chuyu Shen
- Department of Rheumatology and Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong China
| | - Meilin Xu
- Department of Rheumatology and Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong China
| | - Maohua Shi
- Department of Rheumatology, The First People's Hospital of Foshan, Foshan, Guangdong China
| | - Youjun Xiao
- Department of Rheumatology and Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong China
| | - Guoqiang Chen
- Department of Rheumatology, The First People's Hospital of Foshan, Foshan, Guangdong China.
| | - Hanshi Xu
- Department of Rheumatology and Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong China.
| | - Liuqin Liang
- Department of Rheumatology and Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong China.
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Zhang S, Zhong J, Guo D, Zhang S, Huang G, Chen Y, Xu C, Chen W, Zhang Q, Zhao C, Liu S, Luo Z, Lin C. MIAT shuttled by tumor-secreted exosomes promotes paclitaxel resistance in esophageal cancer cells by activating the TAF1/ SREBF1 axis. J Biochem Mol Toxicol 2023; 37:e23380. [PMID: 37132394 DOI: 10.1002/jbt.23380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 02/23/2023] [Accepted: 04/14/2023] [Indexed: 05/04/2023]
Abstract
Chemoresistance remains a major obstacle to the treatment of esophageal cancer (EC). Exosome-mediated transfer of long noncoding RNAs (lncRNAs) has recently been unveiled to correlate with the regulation of drug resistance in EC. This study aimed to investigate the physiological mechanisms by which exosome-encapsulated lncRNA myocardial infarction-associated transcript (MIAT) derived from tumor cells might mediate the paclitaxel (PTX) resistance of EC cells. First, MIAT was experimentally determined to be upregulated in PTX nonresponders and PTX-resistant EC cells. Silencing of MIAT in PTX-resistant EC cells decreased cell viability and enhanced apoptosis, corresponding to a reduced half-maximal inhibitory concentration (IC50 ) value. Next, exosomes were isolated from EC109 and EC109/T cells, and EC109 cells were cocultured with EC109/T-cell-derived exosomes. Accordingly, MIAT was revealed to be transmitted through exosomes from EC109/T cells to EC109 cells. Tumor-derived exosomes carrying MIAT increased the IC50 value of PTX and suppressed apoptosis in EC109 cells to promote PTX resistance. Furthermore, MIAT promoted the enrichment of TATA-box binding protein-associated Factor 1 (TAF1) in the promoter region of sterol regulatory element binding transcription factor 1 (SREBF1), as shown by a chromatin immunoprecipitation assay. This might be the mechanism by which MIAT could promote PTX resistance. Finally, in vivo experiments further confirmed that the knockdown of MIAT attenuated the resistance of EC cells to PTX. Collectively, these results indicate that tumor-derived exosome-loaded MIAT activates the TAF1/SREBF1 axis to induce PTX resistance in EC cells, providing a potential therapeutic target for overcoming PTX resistance in EC.
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Affiliation(s)
- Shuyao Zhang
- Department of Pharmacy, Guangzhou Red Cross Hospital (Guangzhou Red Cross Hospital of Jinan University), Guangzhou, P. R. China
- Department of Pharmacology, Shantou University Medical College, Shantou, P. R. China
| | - Junyong Zhong
- Department of Oncology, Longgang District Central Hospital of Shenzhen, Shenzhen, P. R. China
| | - Dainian Guo
- Good Clinical Practice, Cancer Hospital of Shantou University Medical College, Shantou, P. R. China
| | - Shengqi Zhang
- Dafeng Hospital of Chaoyang District in Shantou City, Shantou, P. R. China
- Medical Oncology, Cancer Hospital of Shantou University Medical College, Shantou, P. R. China
| | - Guifeng Huang
- Dafeng Hospital of Chaoyang District in Shantou City, Shantou, P. R. China
| | - Yun Chen
- Department of Pharmacy, Guangzhou Red Cross Hospital (Guangzhou Red Cross Hospital of Jinan University), Guangzhou, P. R. China
| | - Chengcheng Xu
- Department of Pharmacy, Guangzhou Red Cross Hospital (Guangzhou Red Cross Hospital of Jinan University), Guangzhou, P. R. China
- Department of Pharmacology, Shantou University Medical College, Shantou, P. R. China
| | - Wang Chen
- Department of Pharmacy, Guangzhou Red Cross Hospital (Guangzhou Red Cross Hospital of Jinan University), Guangzhou, P. R. China
| | - Qiuzhen Zhang
- Department of Pharmacology, Shantou University Medical College, Shantou, P. R. China
| | - Chengkuan Zhao
- Department of Pharmacy, Guangzhou Red Cross Hospital (Guangzhou Red Cross Hospital of Jinan University), Guangzhou, P. R. China
- Department of Pharmacology, Shantou University Medical College, Shantou, P. R. China
| | - Sulin Liu
- The First Affiliated Hospital of Shantou University Medical College, Shantou, P. R. China
| | - Zebin Luo
- Dafeng Hospital of Chaoyang District in Shantou City, Shantou, P. R. China
| | - Chaoxian Lin
- The First Affiliated Hospital of Shantou University Medical College, Shantou, P. R. China
- Shantou Chaonan Minsheng Hospital, Shantou, P. R. China
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Tang Z, Sun C, Yan Y, Niu Z, Li Y, Xu X, Zhang J, Wu Y, Li Y, Wang L, Hu C, Li Z, Jiang J, Ying H. Aberrant elevation of FTO levels promotes liver steatosis by decreasing the m6A methylation and increasing the stability of SREBF1 and ChREBP mRNAs. J Mol Cell Biol 2023; 14:6817255. [PMID: 36352530 PMCID: PMC9951264 DOI: 10.1093/jmcb/mjac061] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 07/23/2022] [Accepted: 11/05/2022] [Indexed: 11/11/2022] Open
Abstract
Previous studies have indicated an association of fat mass and obesity-associated (FTO) with nonalcoholic fatty liver disease (NAFLD), the most common chronic liver disease worldwide. This study aimed to decipher the complex role of FTO in hepatic lipid metabolism. We found that a decrease in N6-methyladenosine (m6A) RNA methylation in the liver of mice fed with a high-fat diet (HFD) was accompanied by an increase in FTO expression. Overexpression of FTO in the liver promoted triglyceride accumulation by upregulating the expression of lipogenic genes. Mechanistical studies revealed that FTO could stabilize the mRNAs of sterol regulatory element binding transcription factor 1 (SREBF1) and carbohydrate responsive element binding protein (ChREBP), two master lipogenic transcription factors, by demethylating m6A sites. Knockdown of either SREBF1 or ChREBP attenuated the lipogenic effect of FTO, suggesting that they are bona fide effectors for FTO in regulating lipogenesis. Insulin could stimulate FTO transcription through a mechanism involving the action of intranuclear insulin receptor beta, while knockdown of FTO abrogated the lipogenic effect of insulin. Inhibition of FTO by entacapone decreased the expression of SREBF1, ChREBP, and downstream lipogenic genes, ameliorating liver steatosis in HFD-fed mice. Thus, our study established a critical role of FTO in both the insulin-regulated hepatic lipogenesis and the pathogenesis of NAFLD and provided a potential strategy for treating NAFLD.
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Affiliation(s)
- Zhili Tang
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, and Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200031, China.,Innovation Center for Intervention of Chronic Disease and Promotion of Health, Shanghai 200031, China
| | - Chao Sun
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, and Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200031, China
| | - Ying Yan
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, and Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200031, China
| | - Zhoumin Niu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, and Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200031, China
| | - Yuying Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, and Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200031, China
| | - Xi Xu
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai 200031, China
| | - Jing Zhang
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai 200031, China
| | - Yuting Wu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, and Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200031, China
| | - Yan Li
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Li Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Cheng Hu
- Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Centre for Diabetes, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Zhuoyang Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, and Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200031, China
| | - Jingjing Jiang
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai 200031, China
| | - Hao Ying
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, and Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200031, China.,Innovation Center for Intervention of Chronic Disease and Promotion of Health, Shanghai 200031, China.,Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing 100021, China
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Chen X, Yong H, Chen M, Deng C, Wang P, Chu S, Li M, Hou P, Zheng J, Li Z, Bai J. TRIM21 attenuates renal carcinoma lipogenesis and malignancy by regulating SREBF1 protein stability. J Exp Clin Cancer Res 2023; 42:34. [PMID: 36694250 PMCID: PMC9875457 DOI: 10.1186/s13046-022-02583-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 12/24/2022] [Indexed: 01/26/2023]
Abstract
BACKGROUND Metabolic reprogramming is a hallmark of various cancers. Targeting metabolic processes is a very attractive treatment for cancer. Renal cell carcinoma (RCC) is a type of metabolic disease, and the lipidomic profile of RCC is significantly altered compared with that of healthy tissue. However, the molecular mechanism underlying lipid metabolism regulation in RCC is not clear. METHODS The XF long-chain fatty acid oxidative stress test kits were used to assess the dependence on long-chain fatty acids and mitochondrial function after knockdown TRIM21 in RCC cells. The effect of TRIM21 on the lipid content in RCC cells was determined by metabolomics analysis, Oil Red O staining, and cellular Nile red staining. qRT-PCR and western blot were used to explore the relationship between TRIM21 and lipogenesis, and then the key molecule sterol regulatory element binding transcription factor 1 (SREBF1) was identified to interact with TRIM21 by immunoprecipitation, which was also identified in an orthotopic model. Subsequently, the relevance and clinical significance of TRIM21 and SREBF1 were analyzed by The Cancer Genome Atlas (TCGA) database, and 239 tissues were collected from RCC patients. RESULTS TRIM21 silencing attenuated the dependence of RCC cells on fatty acids, and enhanced lipid accumulation in RCC cells. TRIM21 overexpression significantly decreased lipid contents by decreasing the expression of lipogenic enzymes via ubiquitination-mediated degradation of SREBF1. SREBF1 is critical for TRIM21-mediated lipogenesis inhibition in vitro and in vivo. Moreover, TRIM21 expression is negatively correlated with SREBF1 expression, and TRIM21-SREBF1 is a reliable combinational biomarker for RCC prognosis. CONCLUSION The findings from this study reveal a novel pathway through which TRIM21 inhibits the lipid metabolism process of RCC and shed light on the development of targeted metabolic treatment and prognosis diagnosis of RCC.
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Affiliation(s)
- Xintian Chen
- grid.417303.20000 0000 9927 0537Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu Province 221004 Xuzhou, China ,grid.413389.40000 0004 1758 1622Center of Clinical Oncology, the Affiliated Hospital of Xuzhou Medical University, Jiangsu Xuzhou, China ,grid.417303.20000 0000 9927 0537Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu 221004 Xuzhou, China
| | - Hongmei Yong
- grid.417303.20000 0000 9927 0537Department of Oncology, The Second People’s Hospital of Huai’an, The Affiliated Huai’an Hospital of Xuzhou Medical University, Huaian, Jiangsu China
| | - Miaolei Chen
- grid.417303.20000 0000 9927 0537Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu Province 221004 Xuzhou, China
| | - Chuyin Deng
- grid.417303.20000 0000 9927 0537Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu Province 221004 Xuzhou, China
| | - Pengfei Wang
- grid.417303.20000 0000 9927 0537Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu Province 221004 Xuzhou, China
| | - Sufang Chu
- grid.417303.20000 0000 9927 0537Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu Province 221004 Xuzhou, China
| | - Minle Li
- grid.417303.20000 0000 9927 0537Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu Province 221004 Xuzhou, China ,grid.413389.40000 0004 1758 1622Center of Clinical Oncology, the Affiliated Hospital of Xuzhou Medical University, Jiangsu Xuzhou, China ,grid.417303.20000 0000 9927 0537Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu 221004 Xuzhou, China
| | - Pingfu Hou
- grid.417303.20000 0000 9927 0537Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu Province 221004 Xuzhou, China ,grid.413389.40000 0004 1758 1622Center of Clinical Oncology, the Affiliated Hospital of Xuzhou Medical University, Jiangsu Xuzhou, China ,grid.417303.20000 0000 9927 0537Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu 221004 Xuzhou, China
| | - Junnian Zheng
- grid.417303.20000 0000 9927 0537Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu Province 221004 Xuzhou, China ,grid.413389.40000 0004 1758 1622Center of Clinical Oncology, the Affiliated Hospital of Xuzhou Medical University, Jiangsu Xuzhou, China ,grid.417303.20000 0000 9927 0537Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu 221004 Xuzhou, China
| | - Zhongwei Li
- grid.417303.20000 0000 9927 0537Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu Province 221004 Xuzhou, China ,grid.413389.40000 0004 1758 1622Center of Clinical Oncology, the Affiliated Hospital of Xuzhou Medical University, Jiangsu Xuzhou, China ,grid.417303.20000 0000 9927 0537Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu 221004 Xuzhou, China
| | - Jin Bai
- grid.417303.20000 0000 9927 0537Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu Province 221004 Xuzhou, China ,grid.413389.40000 0004 1758 1622Center of Clinical Oncology, the Affiliated Hospital of Xuzhou Medical University, Jiangsu Xuzhou, China ,grid.417303.20000 0000 9927 0537Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, 209 Tongshan Road, Jiangsu 221004 Xuzhou, China
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Tan M, Lin X, Chen H, Ye W, Yi J, Li C, Liu J, Su J. Sterol regulatory element binding transcription factor 1 promotes proliferation and migration in head and neck squamous cell carcinoma. PeerJ 2023; 11:e15203. [PMID: 37090107 PMCID: PMC10117388 DOI: 10.7717/peerj.15203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/17/2023] [Indexed: 04/25/2023] Open
Abstract
Background Sterol-regulatory element-binding protein 1 (SREBP1) is a transcription factor involved in lipid metabolism that is encoded by sterol regulatory element binding transcription factor 1(SREBF1). SREBP1 overexpression is associated with the progression of several human tumors; however, the role of SREBP1 in head and neck squamous cell carcinoma (HNSC) remains unclear. Methods SREBF1 expression in pan-cancer was analyzed using the Cancer Genome Atlas (TCGA) and Genotype-Tissue Expression (GTEx) data, and the association between SREBF1 expression and clinical characteristics of HNSC patients was examined using the UALCAN database. Enrichment analysis of SREBF1-related genes was performed using the Cluster Profiler R package. TCGA database was used to investigate the relationship between immune cell infiltration and SREBF1 expression. CCK-8, flow cytometry, and wound healing assays were performed to investigate the effect of SREBF1 knockdown on the proliferation and migration of HNSC cells. Results SREBF1 was significantly upregulated in several tumor tissues, including HNSC, and SREBF1 overexpression was positively correlated with sample type, cancer stage, tumor grade, and lymph node stage in HNSC patients. Gene enrichment analysis revealed that SREBF1 is associated with DNA replication and homologous recombination. SREBF1 upregulation was positively correlated with the infiltration of cytotoxic cells, B cells, T cells, T helper cells, and NK CD56 bright cells in HNSC. Knockdown of SREBF1 inhibited the proliferation and migration of HNSC cells (Hep2 and TU212) and induced apoptosis by downregulating the expression of steroidogenic acute regulatory protein-related lipid transfer 4 (STARD4). Conclusions SREBF1 may promote HNSC proliferation, migration and inhibit apoptosis by upregulating STARD4 and affecting the level of immune cell infiltration.
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Cheng C, Liu XH, He J, Gao J, Zhou JT, Fan JN, Jin X, Zhang J, Chang L, Xiong Z, Yu J, Li S, Li X. Apolipoprotein A4 Restricts Diet-induced Hepatic Steatosis via SREBF1-mediated Lipogenesis and Enhances IRS-PI3K-Akt Signaling. Mol Nutr Food Res 2022; 66:e2101034. [PMID: 35909347 DOI: 10.1002/mnfr.202101034] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 07/03/2022] [Indexed: 11/12/2022]
Abstract
SCOPE Hepatic steatosis and insulin resistance (IR) are risk factors for many metabolic syndromes such as NAFLD and T2DM. ApoA4 improves glucose hemostasis by increasing glucose-stimulated insulin secretion and glucose uptake via PI3K-Akt activation in adipocytes. However, whether ApoA4 has an effect on hepatic steatosis or IR remains unclear. METHODS AND RESULTS ApoA4-knockout (KO) aggravates diet-induced obesity, hepatic steatosis and IR in mice promoted by increased hepatic lipogenesis gene expression based on RNA-seq data. Conversely, liver-specific overexpression of ApoA4 via AAV-ApoA4 transduction reverses the effect in ApoA4-KO mice, accompanied by suppressed hepatic lipogenesis, increased lipolysis, and fatty acid oxidation. Short-term treatment with recombinant ApoA4 protein improves glucose clearance and liver insulin sensitivity, and reduces hepatic lipogenesis gene expression in the absence of insulin. Moreover, in primary hepatocytes and a hepatic cell line, ApoA4 improves hepatic glucose uptake via IRS-PI3K-Akt signaling and decreases fat deposition and hepatic lipogenesis gene expression by inhibiting SREBF1 activity. CONCLUSION ApoA4 restricts hepatic steatosis by inhibiting SREBF1-mediated lipogenesis and improves insulin sensitivity and glucose uptake via IRS-PI3K-Akt signaling in the liver. These findings indicate that ApoA4 may serve as a therapeutic target for obesity-associated NAFLD. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Cheng Cheng
- Bio-evidence Sciences Academy (BSA), Xi'an Jiaotong University, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China.,Key laboratory of Ministry of Public Health for Forensic Sciences, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China
| | - Xiao-Huan Liu
- National & Local Joint Engineering Research Center of Biodiagnosis and Biotherapy, Precision Medical Institute, Institute of Digestive Diseases. The Second Affiliated Hospital, Xi'an Jiaotong University, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China
| | - Jing He
- Bio-evidence Sciences Academy (BSA), Xi'an Jiaotong University, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China.,Key laboratory of Ministry of Public Health for Forensic Sciences, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China
| | - Jing Gao
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China
| | - Jin-Ting Zhou
- Bio-evidence Sciences Academy (BSA), Xi'an Jiaotong University, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China.,Key laboratory of Ministry of Public Health for Forensic Sciences, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China
| | - Jing-Na Fan
- Bio-evidence Sciences Academy (BSA), Xi'an Jiaotong University, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China.,Key laboratory of Ministry of Public Health for Forensic Sciences, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China
| | - Xi Jin
- Bio-evidence Sciences Academy (BSA), Xi'an Jiaotong University, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China.,Key laboratory of Ministry of Public Health for Forensic Sciences, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China
| | - Jianbo Zhang
- Bio-evidence Sciences Academy (BSA), Xi'an Jiaotong University, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China.,Key laboratory of Ministry of Public Health for Forensic Sciences, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China
| | - Liao Chang
- Bio-evidence Sciences Academy (BSA), Xi'an Jiaotong University, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China.,Key laboratory of Ministry of Public Health for Forensic Sciences, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China
| | - Zijun Xiong
- Bio-evidence Sciences Academy (BSA), Xi'an Jiaotong University, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China.,Key laboratory of Ministry of Public Health for Forensic Sciences, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China
| | - Jun Yu
- OneHealth Technology Company, Xi'an, 710000, China
| | - Shengbin Li
- Bio-evidence Sciences Academy (BSA), Xi'an Jiaotong University, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China.,Key laboratory of Ministry of Public Health for Forensic Sciences, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China
| | - Xiaoming Li
- National & Local Joint Engineering Research Center of Biodiagnosis and Biotherapy, Precision Medical Institute, Institute of Digestive Diseases. The Second Affiliated Hospital, Xi'an Jiaotong University, Western China Science & Technology Innovation Harbour, Xi'an, 710100, China
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9
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Abstract
The Nrf2-ARE transcriptional pathway plays an important role amongst cellular defence systems regulating and ensuring adequacy of redox responses and oxidant signalling factors. Hepatocyte cellular death and injury is a prominent feature underlying liver pathologies. Diverse endogenous molecules and targets contribute to the outcome of cell survival and the consequent mode of cell death. Several research efforts focused on the confirmation of Nrf2 presence in cell death and its vital necessity against cell compromise, however, little they comprehend of such participation. Hepatocyte cell death modes discussed in this review including autophagy, apoptosis, necrosis, ferroptosis, pyroptosis, fibrosis and others, vary in response of the stimuli burdened. The current review presents a handful of highlights and crosstalk involved in the communication of Nrf2 signalling network with the "up to date" reported hepatocyte cell death modes and their underling mechanisms, and addressing key cellular networks of hepatocyte fate, through a perspective of Nrf2 as a critical transcriptional factor. Collectively, labelling the cross-transduction of Nrf2-ARE axis with key cell execution pathways could provide insights to therapeutic interventions and better research outcomes.
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10
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Park WY, Song G, Noh JH, Kim T, Kim JJ, Hong S, Park J, Um JY. Raphani Semen ( Raphanus sativus L.) Ameliorates Alcoholic Fatty Liver Disease by Regulating De Novo Lipogenesis. Nutrients 2021; 13:4448. [PMID: 34959999 DOI: 10.3390/nu13124448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/25/2021] [Accepted: 12/07/2021] [Indexed: 12/13/2022] Open
Abstract
In this study, we investigated the pharmacological effect of a water extract of Raphani Semen (RSWE) on alcoholic fatty liver disease (AFLD) using ethanol-induced AFLD mice (the NIAAA model) and palmitic acid (PA)-induced steatosis HepG2 cells. An RSWE supplement improved serum and hepatic triglyceride (TG) levels of AFLD mice, as well as their liver histological structure. To explore the molecular action of RSWE in the improvement of AFLD, we investigated the effect of RSWE on four major pathways for lipid homeostasis in the liver: free fatty acid transport, lipogenesis, lipolysis, and β-oxidation. Importantly, RSWE decreased the mRNA expression of de novo lipogenesis-related genes, such as Srebf1, Cebpa, Pparg, and Lpin1, as well as the protein levels of these factors, in the liver of AFLD mice. That these actions of RSWE affect lipogenesis was confirmed using PA-induced steatosis HepG2 cells. Overall, our findings suggest that RSWE has the potential for improvement of AFLD by inhibiting de novo lipogenesis.
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11
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Shakhtshneider E, Ivanoshchuk D, Timoshchenko O, Orlov P, Semaev S, Valeev E, Goonko A, Ladygina N, Voevoda M. Analysis of Rare Variants in Genes Related to Lipid Metabolism in Patients with Familial Hypercholesterolemia in Western Siberia (Russia). J Pers Med 2021; 11:1232. [PMID: 34834584 DOI: 10.3390/jpm11111232] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 11/14/2021] [Accepted: 11/15/2021] [Indexed: 12/29/2022] Open
Abstract
The aim of this work was to identify genetic variants potentially involved in familial hypercholesterolemia in 43 genes associated with lipid metabolism disorders. Targeted high-throughput sequencing of lipid metabolism genes was performed (80 subjects with a familial-hypercholesterolemia phenotype). For patients without functionally significant substitutions in the above genes, multiplex ligation-dependent probe amplification was conducted to determine bigger mutations (deletions and/or duplications) in the LDLR promoter and exons. A clinically significant variant in some gene associated with familial hypercholesterolemia was identified in 47.5% of the subjects. Clinically significant variants in the LDLR gene were identified in 19 probands (73.1% of all variants identified in probands); in three probands (11.5%), pathogenic variants were found in the APOB gene; and in four probands (15.4%), rare, clinically significant variants were identified in genes LPL, SREBF1, APOC3, and ABCG5. In 12 (85.7%) of 14 children of the probands, clinically significant variants were detectable in genes associated with familial hypercholesterolemia. The use of clinical criteria, targeted sequencing, and multiplex ligation-dependent probe amplification makes it possible to identify carriers of rare clinically significant variants in a wide range of lipid metabolism genes and to investigate their influence on phenotypic manifestations of familial hypercholesterolemia.
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12
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Sitarz K, Czamara K, Bialecka J, Klimek M, Szostek S, Kaczor A. Dual Switch in Lipid Metabolism in Cervical Epithelial Cells during Dysplasia Development Observed Using Raman Microscopy and Molecular Methods. Cancers (Basel) 2021; 13:1997. [PMID: 33919178 PMCID: PMC8122332 DOI: 10.3390/cancers13091997] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/14/2021] [Accepted: 04/16/2021] [Indexed: 01/31/2023] Open
Abstract
Cellular lipid metabolism is significantly transformed during oncogenesis. To assess how dysplasia development influences lipid cellular metabolisms and what is the molecular background behind it, cervical epithelial cells of 63 patients assigned to seven groups (based on the cytological examination and HPVhr test results) were studied using a multimethodological approach including Raman microscopy and molecular methods. The consistent picture obtained studying the lipid content, cell inflammation, SREBF1 gene methylation (hence SREBP1 inhibition) and level of mitochondrial DNA copies (indirectly the number of mitochondria) showed that changes in lipid metabolism were multidirectional. Cells from patients classified as mildly dysplastic (LSIL) exhibited a unique behavior (the highest level of inflammation and SREBF1 methylation, the lowest lipid content and mitochondrial DNA). On the contrary, cells from severe dysplastic (HSIL) and cancer (SCC) groups showed the opposite characteristics including the lowest SREBF1 gene methylation as well as the highest level of mitochondrial DNA and lipid cellular concentration (for HSIL/HPVhr+ and SCC groups). Following dysplastic progression, the lipid content decreases significantly (compared to the control) for mildly abnormal cells, but then increases for HSIL/HPVhr+ and SCC groups. This intriguing dual switch in lipid metabolism (reflected also in other studied parameters) on the way from normal to squamous carcinoma cells is of potential diagnostic interest.
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Affiliation(s)
- Katarzyna Sitarz
- Chair of Microbiology, Department of Molecular Medical Microbiology, Faculty of Medicine, Jagiellonian University Medical College, 18 Czysta Street, 31-121 Krakow, Poland;
- Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa Street, 30-387 Krakow, Poland
| | - Krzysztof Czamara
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Street, 30-348 Krakow, Poland;
| | - Joanna Bialecka
- Centre of Microbiological Research and Autovaccines, 17 Slawkowska Street, 31-016 Krakow, Poland;
| | - Malgorzata Klimek
- Clinic of Radiotherapy, Maria Sklodowska-Curie Institute—Oncology Center, 11 Garncarska Street, 31-115 Krakow, Poland;
| | - Slawa Szostek
- Chair of Microbiology, Department of Molecular Medical Microbiology, Faculty of Medicine, Jagiellonian University Medical College, 18 Czysta Street, 31-121 Krakow, Poland;
| | - Agnieszka Kaczor
- Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa Street, 30-387 Krakow, Poland
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Street, 30-348 Krakow, Poland;
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13
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Nakade Y, Kitano R, Yamauchi T, Kimoto S, Sakamoto K, Inoue T, Kobayashi Y, Ohashi T, Sumida Y, Ito K, Yoneda M. Effect of Central Corticotropin-Releasing Factor on Hepatic Lipid Metabolism and Inflammation-Related Gene Expression in Rats. Int J Mol Sci 2021; 22:3940. [PMID: 33920431 DOI: 10.3390/ijms22083940] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/05/2021] [Accepted: 04/09/2021] [Indexed: 12/30/2022] Open
Abstract
Corticotropin-releasing factor (CRF) in the brain acts on physiological and pathophysiological modulation of the hepatobiliary system. Central CRF administration aggravates experimental acute liver injury by decreasing hepatic blood flow. Conversely, minimal evidence is available regarding the effect of centrally acting CRF on hepatic lipid metabolism and inflammation. We examined whether central CRF affects hepatic lipid metabolism and inflammation-related gene expression in rats. Male Long Evans rats were intracisternally injected with CRF (10 μg) or saline. Rats were sacrificed 2 h, 6 h, and 24 h after the CRF injection, the liver was isolated, and mRNA was extracted. Next, hepatic lipid metabolism and inflammation-related gene expression were examined. Hepatic SREBF1 (sterol regulatory element-binding transcription factor 1) mRNA levels were significantly increased 6 h and 24 h after intracisternal CRF administration when compared with those in the control group. Hepatic TNFα and IL1β mRNA levels increased significantly 6 h after intracisternal CRF administration. Hepatic sympathectomy or guanethidine treatment, not hepatic branch vagotomy or atropine treatment, inhibited central CRF-induced increase in hepatic SREBF1, TNFα and IL1β mRNA levels. These results indicated that central CRF affects hepatic de novo lipogenesis and inflammation-related gene expression through the sympathetic-noradrenergic nervous system in rats.
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14
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Pu Y, Zhao Q, Men X, Jin W, Yang M. MicroRNA-325 facilitates atherosclerosis progression by mediating the SREBF1/LXR axis via KDM1A. Life Sci 2021; 277:119464. [PMID: 33811891 DOI: 10.1016/j.lfs.2021.119464] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 03/19/2021] [Accepted: 03/27/2021] [Indexed: 02/08/2023]
Abstract
AIMS MicroRNA-325 (miR-325) was significantly upregulated in diabetic atherosclerosis, while its specific role in atherosclerosis has not been established. The present study was set to probe the effects of miR-325 on the atherosclerosis progression and to explore the mechanisms. MATERIALS AND METHODS The ApoE-/- mouse with atherosclerosis was developed to detect the miR-325 expression in atherosclerotic plaques. The pathological symptoms of atherosclerotic mice were observed by injection of miR-325 mimic or inhibitor. Subsequently, the levels of CRP, IL-6, IL-1β and TNF-ɑ in mouse serum were measured by ELISA. Then, miR-325 was overexpressed or silenced in RAW264.7-derived foam cells (FCs), and cholesterol efflux and lipid content were evaluated. Furthermore, miR-325 expression was altered in HA-VSMCs to measure viability and apoptosis. The targets of miR-325 were predicted in a bioinformatics website, and the expression of KDM1A, SREBF1 and PPARγ-LXR-ABCA1 in mouse arterial tissues and cells was detected, followed by rescue experiments. KEY FINDINGS miR-325 was elevated in arterial tissues of atherosclerotic mice, and miR-325 inhibition in mice reduced the contents of total cholesterol, triglyceride, low-density lipoprotein, and CRP, IL-6, IL-1β and TNF-ɑ levels in mouse serum. miR-325 inhibitor facilitated the cholesterol efflux and decreased the lipid content in RAW264.7 cells, and also diminished HA-VSMC viability. miR-325 targeted KDM1A to reduce SREBF1 expression, and further KDM1A suppression inhibited cholesterol efflux in RAW264.7 cells and the activation of PPARγ-LXR-ABCA1 pathway. SIGNIFICANCE miR-325 lowers SREBF1 expression by decreasing KDM1A expression, thereby inhibiting the activation of the PPARγ-LXR-ABCA1 pathway and thus promoting atherosclerosis.
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Affiliation(s)
- Yanhua Pu
- Department of General Family Medicine No.1, The Fourth Hospital of Jinan, Jinan 250031, Shandong, PR China
| | - Qian Zhao
- Department of General Family Medicine No.1, The Fourth Hospital of Jinan, Jinan 250031, Shandong, PR China
| | - Xuelin Men
- Department of Respiratory Medicine, The Fourth Hospital of Jinan, Jinan 250031, Shandong, PR China
| | - Wei Jin
- Department of Catheter Room, The Fourth Hospital of Jinan, Jinan 250031, Shandong, PR China
| | - Min Yang
- Department of Ultrasound Diagnosis, The Fourth Hospital of Jinan, Jinan 250031, Shandong, PR China.
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15
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Liu Y, Wang Y, Hao S, Qin Y, Wu Y. Knockdown of sterol O-acyltransferase 1 (SOAT1) suppresses SCD1-mediated lipogenesis and cancer procession in prostate cancer. Prostaglandins Other Lipid Mediat 2021; 153:106537. [PMID: 33454379 DOI: 10.1016/j.prostaglandins.2021.106537] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 12/20/2020] [Accepted: 01/12/2021] [Indexed: 12/17/2022]
Abstract
Prostate cancer (PCa) is one of the most fatal malignant tumors that occurs in the prostate epithelium, especially in older men, the mortality of which ranks sixth among all cancer-related deaths. It has been urgently needed to elucidate the pathogenesis of PCa and provide promising therapeutic targets for PCa treatment. The Sterol O-acyltransferase 1 (SOAT1), cholesterol metabolism enzyme, was widely expressed in various cancer tissues, resulting in cancer progression. SOAT1 has been demonstrated to be highly expressed in prostate cancer tissues, whereas the underlying mechanism has not been elucidated. Herein, we found the expression of SOAT1 was elevated in human PCa tissues, which demonstrated SOAT1 level was correlated with lymph node metastasis (p = 0.006), clinical stage (p = 0.032), grading (p = 0.036), and Gleason score (p = 0.030) of PCa patients. In addition, we revealed that SOAT1 promoted proliferation and liposynthesis of PCa cells by targeting Stearoyl-CoA Desaturase 1 (SCD1). Our data further confirmed that SCD1 overexpression reversed the proliferation and liposynthesis defects caused by SOAT1 depletion in PCa cells, however, SOAT1 depletion inhibited tumor growth of PCa cells in mice. We further found SOAT1 contributed to the progression of PCa via SREBF1 pathway. Taken together, our data revealed the mechanism underlying SOAT1 promoting PCa progression in vitro and in vivo.
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Affiliation(s)
- Yuan Liu
- Department of Urology, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital/Hangzhou Red Cross Hospital, Hangzhou City, Zhejiang Province, 310003, China
| | - Yeqiang Wang
- Department of Urology, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital/Hangzhou Red Cross Hospital, Hangzhou City, Zhejiang Province, 310003, China
| | - Sida Hao
- Department of Urology, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital/Hangzhou Red Cross Hospital, Hangzhou City, Zhejiang Province, 310003, China
| | - Yong Qin
- Department of Urology, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital/Hangzhou Red Cross Hospital, Hangzhou City, Zhejiang Province, 310003, China
| | - Yuye Wu
- Department of Urology, the Second Affiliated Hospital of Fujian Traditional Chinese Medical University, No. 282, Wusi Road, Gulou District, Fuzhou City, Fujian Province, 350003, China.
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16
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Chacon-Camacho OF, Arce-Gonzalez R, Ordaz-Robles T, Perezpeña-Diazconti M, Nava-Castañeda A, Zenteno JC. Exome sequencing identifies a SREBF1 recurrent ARG557CYS mutation as the cause of hereditary mucoepithelial dysplasia in a family with high clinical variability. Am J Med Genet A 2020; 182:2773-2777. [PMID: 32902915 DOI: 10.1002/ajmg.a.61849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 08/05/2020] [Accepted: 08/15/2020] [Indexed: 11/08/2022]
Abstract
Hereditary mucoepithelial dysplasia (HMD) is an uncommon autosomal dominant disease affecting skin, mucosae, hair, eyes, and lungs. Prominent clinical features include non-scarring alopecia, mucosal erythema, perineal erythematous intertrigo, and involvement of the conjunctival mucosa. To date, 20 familial or sporadic HMD cases have been described, most of them originating from Caucasian ethnic groups. In this study, a novel HMD pedigree, including an affected father and his daughter, is reported. Clinical expression showed significant differences in affected subjects, especially in the distribution and severity of skin lesions. Exome sequencing demonstrated that both affected subjects carried a heterozygous c.1669C>T (p.Arg557Cys) pathogenic variant in the SREBF1 gene. Our results improve the knowledge of the clinical and genetic features of HMD. In addition, a comparative review of the clinical features of all published HMD cases is presented.
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Affiliation(s)
- Oscar F Chacon-Camacho
- Department of Genetics, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico.,Faculty of Superior Studies-Iztacala, Department of Genetics and Molecular Biology, School of Medicine, Universidad Nacional Autónoma de México, Tlalnepantla, Estado de Mexico, Mexico
| | - Rocio Arce-Gonzalez
- Department of Genetics, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
| | - Thania Ordaz-Robles
- Department of Genetics, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
| | | | - Angel Nava-Castañeda
- Department of Orbit and Oculoplastics, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
| | - Juan Carlos Zenteno
- Department of Genetics, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico.,Faculty of Medicine, Department of Biochemistry, Universidad Nacional Autónoma de México, Mexico City, Mexico
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17
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Wang H, Humbatova A, Liu Y, Qin W, Lee M, Cesarato N, Kortüm F, Kumar S, Romano MT, Dai S, Mo R, Sivalingam S, Motameny S, Wu Y, Wang X, Niu X, Geng S, Bornholdt D, Kroisel PM, Tadini G, Walter SD, Hauck F, Girisha KM, Calza AM, Bottani A, Altmüller J, Buness A, Yang S, Sun X, Ma L, Kutsche K, Grzeschik KH, Betz RC, Lin Z. Mutations in SREBF1, Encoding Sterol Regulatory Element Binding Transcription Factor 1, Cause Autosomal-Dominant IFAP Syndrome. Am J Hum Genet 2020; 107:34-45. [PMID: 32497488 DOI: 10.1016/j.ajhg.2020.05.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 05/04/2020] [Indexed: 12/14/2022] Open
Abstract
IFAP syndrome is a rare genetic disorder characterized by ichthyosis follicularis, atrichia, and photophobia. Previous research found that mutations in MBTPS2, encoding site-2-protease (S2P), underlie X-linked IFAP syndrome. The present report describes the identification via whole-exome sequencing of three heterozygous mutations in SREBF1 in 11 unrelated, ethnically diverse individuals with autosomal-dominant IFAP syndrome. SREBF1 encodes sterol regulatory element-binding protein 1 (SREBP1), which promotes the transcription of lipogenes involved in the biosynthesis of fatty acids and cholesterols. This process requires cleavage of SREBP1 by site-1-protease (S1P) and S2P and subsequent translocation into the nucleus where it binds to sterol regulatory elements (SRE). The three detected SREBF1 mutations caused substitution or deletion of residues 527, 528, and 530, which are crucial for S1P cleavage. In vitro investigation of SREBP1 variants demonstrated impaired S1P cleavage, which prohibited nuclear translocation of the transcriptionally active form of SREBP1. As a result, SREBP1 variants exhibited significantly lower transcriptional activity compared to the wild-type, as demonstrated via luciferase reporter assay. RNA sequencing of the scalp skin from IFAP-affected individuals revealed a dramatic reduction in transcript levels of low-density lipoprotein receptor (LDLR) and of keratin genes known to be expressed in the outer root sheath of hair follicles. An increased rate of in situ keratinocyte apoptosis, which might contribute to skin hyperkeratosis and hypotrichosis, was also detected in scalp samples from affected individuals. Together with previous research, the present findings suggest that SREBP signaling plays an essential role in epidermal differentiation, skin barrier formation, hair growth, and eye function.
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Affiliation(s)
- Huijun Wang
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
| | - Aytaj Humbatova
- Institute of Human Genetics, University of Bonn, Medical Faculty & University Hospital Bonn, 53127 Bonn, Germany
| | - Yuanxiang Liu
- Department of Dermatology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - Wen Qin
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
| | - Mingyang Lee
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
| | - Nicole Cesarato
- Institute of Human Genetics, University of Bonn, Medical Faculty & University Hospital Bonn, 53127 Bonn, Germany
| | - Fanny Kortüm
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Sheetal Kumar
- Institute of Human Genetics, University of Bonn, Medical Faculty & University Hospital Bonn, 53127 Bonn, Germany
| | - Maria Teresa Romano
- Institute of Human Genetics, University of Bonn, Medical Faculty & University Hospital Bonn, 53127 Bonn, Germany
| | - Shangzhi Dai
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
| | - Ran Mo
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
| | - Sugirthan Sivalingam
- Institute for Medical Biometry, Informatics and Epidemiology, University of Bonn, Medical Faculty, 53127 Bonn, Germany; Institute for Genomic Statistics and Bioinformatics, University of Bonn, Medical Faculty, 53127 Bonn, Germany
| | - Susanne Motameny
- Cologne Center for Genomics, University of Cologne, 50931 Cologne, Germany
| | - Yuan Wu
- Department of Ophthalmology, Peking University First Hospital, Beijing 100034, China
| | - Xiaopeng Wang
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - Xinwu Niu
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - Songmei Geng
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - Dorothea Bornholdt
- Centre for Human Genetics, University of Marburg, 35033 Marburg, Germany
| | - Peter M Kroisel
- Institute of Human Genetics, Medical University of Graz, 8010 Graz, Austria
| | - Gianluca Tadini
- Pediatric Dermatology Unit, Department of Pathophysiology and Transplantation, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, University of Milan, Milan, Italy
| | - Scott D Walter
- Retina Consultants, P.C., 43 Woodland Street, Suite 100, Hartford, CT 06105, USA
| | - Fabian Hauck
- Department of Pediatrics, University Hospital Carl Gustav Carus, TU Dresden, 01307 Dresden, Germany; Department of Pediatrics, Dr. von Hauner Children's Hospital, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Katta M Girisha
- Department of Medical Genetics, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Anne-Marie Calza
- Department of Dermatology and Venereology, Geneva University Hospitals, 1205 Geneva, Switzerland
| | - Armand Bottani
- Service of Genetic Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland
| | - Janine Altmüller
- Cologne Center for Genomics, University of Cologne, 50931 Cologne, Germany
| | - Andreas Buness
- Institute for Medical Biometry, Informatics and Epidemiology, University of Bonn, Medical Faculty, 53127 Bonn, Germany; Institute for Genomic Statistics and Bioinformatics, University of Bonn, Medical Faculty, 53127 Bonn, Germany
| | - Shuxia Yang
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
| | - Xiujuan Sun
- Department of Dermatology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - Lin Ma
- Department of Dermatology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - Kerstin Kutsche
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | | | - Regina C Betz
- Institute of Human Genetics, University of Bonn, Medical Faculty & University Hospital Bonn, 53127 Bonn, Germany.
| | - Zhimiao Lin
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China.
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18
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Krause C, Sievert H, Geißler C, Grohs M, El Gammal AT, Wolter S, Ohlei O, Kilpert F, Krämer UM, Kasten M, Klein C, Brabant GE, Mann O, Lehnert H, Kirchner H. Critical evaluation of the DNA-methylation markers ABCG1 and SREBF1 for Type 2 diabetes stratification. Epigenomics 2019; 11:885-897. [PMID: 31169416 DOI: 10.2217/epi-2018-0159] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: Validation of epigenome-wide association studies is sparse. Therefore, we evaluated the methylation markers cg06500161 (ABCG1) and cg11024682 (SREBF1) as classifiers for diabetes stratification. Patients & methods: DNA methylation was measured in blood (n = 167), liver (n = 99) and visceral adipose tissue (n = 99) of nondiabetic or Type 2 diabetic subjects by bisulfite pyrosequencing. Results: DNA methylation at cg11024682 in blood and liver correlated with BMI. Methylation at cg06500161 was influenced by the adjacent SNP rs9982016. Insulin-resistant and sensitive subjects could be stratified by DNA methylation status in blood or visceral adipose tissue. Conclusion: DNA methylation at both loci in blood presents a promising approach for risk group stratification and could be valuable for personalized Type 2 diabetes risk prediction in the future.
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Affiliation(s)
- Christin Krause
- Medical Department I, Division Epigenetics & Metabolism, University of Lübeck, Lübeck, Germany
| | - Helen Sievert
- Medical Department I, Division Epigenetics & Metabolism, University of Lübeck, Lübeck, Germany
| | - Cathleen Geißler
- Medical Department I, Division Epigenetics & Metabolism, University of Lübeck, Lübeck, Germany
| | - Martina Grohs
- Medical Department I, Division Epigenetics & Metabolism, University of Lübeck, Lübeck, Germany
| | - Alexander T El Gammal
- Department of General, Visceral & Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stefan Wolter
- Department of General, Visceral & Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Olena Ohlei
- Lübeck Interdisciplinary Platform for Genome Analytics, Institutes of Neurogenetics & Integrative & Experimental Genomics, University of Lübeck, Lübeck, Germany
| | - Fabian Kilpert
- Lübeck Interdisciplinary Platform for Genome Analytics, Institutes of Neurogenetics & Integrative & Experimental Genomics, University of Lübeck, Lübeck, Germany
| | - Ulrike M Krämer
- Department of Neurology, University of Lübeck, Lübeck, Germany.,Institute of Psychology II, University of Lübeck, Lübeck, Germany
| | - Meike Kasten
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany.,Department of Psychiatry & Psychotherapy, University of Lübeck, Lübeck, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Georg E Brabant
- Medical Department I, Division Epigenetics & Metabolism, University of Lübeck, Lübeck, Germany
| | - Oliver Mann
- Department of General, Visceral & Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Hendrik Lehnert
- Medical Department I, Division Epigenetics & Metabolism, University of Lübeck, Lübeck, Germany.,German Center for Diabetes Research (DZD), München-Neuherberg, Germany
| | - Henriette Kirchner
- Medical Department I, Division Epigenetics & Metabolism, University of Lübeck, Lübeck, Germany.,German Center for Diabetes Research (DZD), München-Neuherberg, Germany
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19
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Pavethynath S, Imai C, Jin X, Hichiwa N, Takimoto H, Okamitsu M, Tarui I, Aoyama T, Yago S, Fudono A, Muramatsu M, Miyasaka N, Sato N. Metabolic and Immunological Shifts during Mid-to-Late Gestation Influence Maternal Blood Methylation of CPT1A and SREBF1. Int J Mol Sci 2019; 20:E1066. [PMID: 30823689 DOI: 10.3390/ijms20051066] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 02/19/2019] [Accepted: 02/25/2019] [Indexed: 01/08/2023] Open
Abstract
Mid-to-late gestation is a unique period in which women experience dynamic changes in lipid metabolism. Although the recent intensive epigenome-wide association studies (EWAS) using peripheral leukocytes have revealed that lipid-related traits alter DNA methylation, the influence of pregnancy-induced metabolic changes on the methylation levels of these differentially methylated sites is not well known. In this study, we performed a prospective cohort study of pregnant women (n = 52) using the MassARRAY EpiTYPER assay and analyzed the methylation levels of variably methylated sites, including CPT1A intron 1 and SREBF1 intron 1 CpGs, which were previously verified to be robustly associated with adiposity traits. Although methylation of SREBF1 was associated with body mass index (BMI) and low-density lipoprotein cholesterol at mid-gestation, this association was attenuated at late gestation, which was consistent with the metabolic switch from an anabolic to a catabolic state. However, the BMI association with CPT1A intron 1 methylation appeared to strengthen at late gestation; this association was mediated by pre-pregnancy BMI-dependent change in the leukocyte proportion during mid-to-late gestation. Thus, the methylation of adiposity-related differentially methylated regions was sensitive to metabolic and immunological changes during mid-to-late gestation.
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20
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Stachowiak M, Szczerbal I, Flisikowski K. Investigation of allele-specific expression of genes involved in adipogenesis and lipid metabolism suggests complex regulatory mechanisms of PPARGC1A expression in porcine fat tissues. BMC Genet 2018; 19:107. [PMID: 30497374 PMCID: PMC6267897 DOI: 10.1186/s12863-018-0696-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 11/19/2018] [Indexed: 02/06/2023] Open
Abstract
Background The expression of genes involved in regulating adipogenesis and lipid metabolism may affect economically important fatness traits in pigs. Allele-specific expression (ASE) reflects imbalance between allelic transcript levels and can be used to identify underlying cis-regulatory elements. ASE has not yet been intensively studied in pigs. The aim of this investigation was to analyze the differential allelic expression of four genes, PPARA, PPARG, SREBF1, and PPARGC1A, which are involved in the regulation of fat deposition in porcine subcutaneous and visceral fat and longissimus dorsi muscle. Results Quantification of allelic proportions by pyrosequencing revealed that both alleles of PPARG and SREBF1 are expressed at similar levels. PPARGC1A showed the greatest ASE imbalance in fat deposits in Polish Large White (PLW), Polish Landrace and Pietrain pigs; and PPARA in PLW pigs. Significant deviations of mean PPARGC1A allelic transcript ratio between cDNA and genomic DNA were detected in all tissues, with the most pronounced difference (p < 0.001) in visceral fat of PLW pigs. To search for potential cis-regulatory elements affecting ASE in the PPARGC1A gene we analyzed the effects of four SNPs (rs337351686, rs340650517, rs336405906 and rs345224049) in the promoter region, but none were associated with ASE in the breeds studied. DNA methylation analysis revealed significant CpG methylation differences between samples showing balanced (allelic transcript ratio ≈1) and imbalanced allelic expression for CpG site at the genomic position in chromosome 8 (SSC8): 18527678 in visceral fat (p = 0.017) and two CpG sites (SSC8:18525215, p = 0.030; SSC8:18525237, p = 0.031) in subcutaneous fat. Conclusions Our analysis of differential allelic expression suggests that PPARGC1A is subjected to cis-regulation in porcine fat tissues. Further studies are necessary to identify other regulatory elements localized outside the PPARGC1A proximal promoter region. Electronic supplementary material The online version of this article (10.1186/s12863-018-0696-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Monika Stachowiak
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Wolynska 33, 60-637, Poznan, Poland.
| | - Izabela Szczerbal
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Wolynska 33, 60-637, Poznan, Poland
| | - Krzysztof Flisikowski
- Chair of Livestock Biotechnology, Technical University of Munich, Liesel-Beckmannstr. 1, 85354, Freising, Germany
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21
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Maertens A, Tran V, Kleensang A, Hartung T. Weighted Gene Correlation Network Analysis (WGCNA) Reveals Novel Transcription Factors Associated With Bisphenol A Dose-Response. Front Genet 2018; 9:508. [PMID: 30483308 PMCID: PMC6240694 DOI: 10.3389/fgene.2018.00508] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 10/10/2018] [Indexed: 11/13/2022] Open
Abstract
Despite Bisphenol-A (BPA) being subject to extensive study, a thorough understanding of molecular mechanism remains elusive. Here we show that using weighted gene correlation network analysis (WGCNA), which takes advantage of a graph theoretical approach to understanding correlations amongst genes and grouping genes into modules that typically have co-ordinated biological functions and regulatory mechanisms, that despite some commonality in altered genes, there is minimal overlap between BPA and estrogen in terms of network topology. We confirmed previous findings that ZNF217 and TFAP2C are involved in the estrogen pathway, and are implicated in BPA as well, although for BPA they appear to be active in the absence of canonical estrogen-receptor driven gene expression. Furthermore, our study suggested that PADI4 and RACK7/ZMYNDB8 may be involved in the overlap in gene expression between estradiol and BPA. Lastly, we demonstrated that even at low doses there are unique transcription factors that appear to be driving the biology of BPA, such as SREBF1. Overall, our data is consistent with other reports that BPA leads to subtle gene changes rather than profound aberrations of a conserved estrogen signaling (or other) pathways.
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Affiliation(s)
- Alexandra Maertens
- Center for Alternatives to Animal Testing, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States
| | - Vy Tran
- Center for Alternatives to Animal Testing, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States
| | - Andre Kleensang
- Center for Alternatives to Animal Testing, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States
| | - Thomas Hartung
- Center for Alternatives to Animal Testing, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States.,Center for Alternatives to Animal Testing - Europe, University of Konstanz, Konstanz, Germany.,Doerenkamp-Zbinden Professor and Chair for Evidence-Based Toxicology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States
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22
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Niculescu LS, Simionescu N, Fuior EV, Stancu CS, Carnuta MG, Dulceanu MD, Raileanu M, Dragan E, Sima AV. Inhibition of miR-486 and miR-92a decreases liver and plasma cholesterol levels by modulating lipid-related genes in hyperlipidemic hamsters. Mol Biol Rep 2018; 45:497-509. [PMID: 29725814 DOI: 10.1007/s11033-018-4186-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 04/20/2018] [Indexed: 01/04/2023]
Abstract
In the present study we aimed to evaluate the potential of in vivo inhibition of miR-486 and miR-92a to reverse hyperlipidemia, then to identify and validate their lipid metabolism-related target genes. Male Golden-Syrian hamsters fed a hyperlipidemic (HL) diet (standard chow plus 3% cholesterol and 15% butter, 10 weeks) were injected subcutaneously with lock-nucleic acid inhibitors for either miR-486 or miR-92a. Lipids and miRNAs levels in liver and plasma, and hepatic expression of miRNAs target genes were assessed in all HL hamsters. MiR-486 and miR-92a target genes were identified by miRWalk analysis and validated by 3'UTR cloning in pmirGLO vectors. HL hamsters had increased liver (2.8-fold) and plasma (twofold) miR-486 levels, and increased miR-92a (2.8-fold and 1.8-fold, respectively) compared to normolipidemic hamsters. After 2 weeks treatment, liver and plasma cholesterol levels decreased (23 and 17.5% for anti-miR-486, 16 and 22% for miR-92a inhibition). Hepatic triglycerides and non-esterified fatty acids content decreased also significantly. Bioinformatics analysis and 3'UTR cloning in pmirGLO vector showed that sterol O-acyltransferase-2 (SOAT2) and sterol-regulatory element binding transcription factor-1 (SREBF1) are targeted by miR-486, while ATP-binding cassette G4 (ABCG4) and Niemann-Pick C1 (NPC1) by miR-92a. In HL livers and in cultured HepG2 cells, miR-486 inhibition restored the levels of SOAT2 and SREBF1 expression, while anti-miR-92a restored ABCG4, NPC1 and SOAT2 expression compared to scrambled-treated HL hamsters or cultured cells. In vivo inhibition of miR-486 and miR-92a could be a useful and valuable new approach to correct lipid metabolism dysregulation.
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Affiliation(s)
- Loredan S Niculescu
- Lipidomics Department, Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8 B.P. Hasdeu Street, 050568, Bucharest, Romania.
| | - Natalia Simionescu
- Lipidomics Department, Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8 B.P. Hasdeu Street, 050568, Bucharest, Romania
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, "Petru Poni" Institute of Macromolecular Chemistry, Iasi, Romania
| | - Elena V Fuior
- Lipidomics Department, Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8 B.P. Hasdeu Street, 050568, Bucharest, Romania
| | - Camelia S Stancu
- Lipidomics Department, Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8 B.P. Hasdeu Street, 050568, Bucharest, Romania
| | - Mihaela G Carnuta
- Lipidomics Department, Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8 B.P. Hasdeu Street, 050568, Bucharest, Romania
| | - Madalina D Dulceanu
- Lipidomics Department, Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8 B.P. Hasdeu Street, 050568, Bucharest, Romania
| | - Mina Raileanu
- Lipidomics Department, Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8 B.P. Hasdeu Street, 050568, Bucharest, Romania
| | - Emanuel Dragan
- Lipidomics Department, Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8 B.P. Hasdeu Street, 050568, Bucharest, Romania
| | - Anca V Sima
- Lipidomics Department, Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8 B.P. Hasdeu Street, 050568, Bucharest, Romania
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23
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Harvatine KJ, Boisclair YR, Bauman DE. Time-dependent effect of trans-10,cis-12 conjugated linoleic acid on gene expression of lipogenic enzymes and regulators in mammary tissue of dairy cows. J Dairy Sci 2018; 101:7585-7592. [PMID: 29803423 DOI: 10.3168/jds.2017-13935] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 03/20/2018] [Indexed: 12/26/2022]
Abstract
Trans-10,cis-12 conjugated linoleic acid (CLA) has been identified as an intermediate of rumen fatty acid biohydrogenation that caused milk fat depression (MFD) in the dairy cow. Previous studies in cows experiencing CLA- and diet-induced MFD have identified reduced mammary expression of the master lipogenic regulator sterol response element transcription factor 1 (SREBF1) and many of its dependent genes. To distinguish between primary mechanisms regulating milk fat synthesis and secondary adaptations to the reduction in milk fat, we conducted a time-course experiment. Eleven dairy cows received by abomasal infusion an initial priming dose of 6.25 g of CLA followed by 12.5 g/d delivered in multiple pulses per day for 5 d. Cows were milked 3×/d and mammary biopsies were obtained under basal condition (prebolus control) and 12, 30, and 120 h relative to initiation of CLA infusion. Milk fat concentration and yield decreased progressively reaching a nadir at 69 h (1.82% and 38.2 g/h) and averaged 2.03 ± 0.19% and 42.1 ± 4.10 g/h on the last day of treatment (±standard deviation). Expression of fatty acid synthase (FASN) and lipoprotein lipase (LPL) were decreased at 30 and 120 h compared with control. Expression of SREBF1 and THRSP were also decreased at 30 and 120 h compared with control. Additionally, we failed to observe changes in other factors, including peroxisome proliferator-activated receptor γ and liver × receptor β and milk fat globular membrane proteins, during CLA treatment. However, expression of milk fat globular membrane proteins were decreased after 14 d of diet-induced MFD in samples from a previous experiment, indicating a possible long-term response. The rapid decrease in lipogenic enzymes, SREBF1, and THRSP provide strong support for their transcriptional regulation as a primary mechanism of milk fat depression.
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Affiliation(s)
- Kevin J Harvatine
- Department of Animal Science, Penn State University, University Park 16802.
| | - Y R Boisclair
- Department of Animal Science, Cornell University, Ithaca, NY, 14853
| | - Dale E Bauman
- Department of Animal Science, Cornell University, Ithaca, NY, 14853
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24
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Desert C, Baéza E, Aite M, Boutin M, Le Cam A, Montfort J, Houee-Bigot M, Blum Y, Roux PF, Hennequet-Antier C, Berri C, Metayer-Coustard S, Collin A, Allais S, Le Bihan E, Causeur D, Gondret F, Duclos MJ, Lagarrigue S. Multi-tissue transcriptomic study reveals the main role of liver in the chicken adaptive response to a switch in dietary energy source through the transcriptional regulation of lipogenesis. BMC Genomics 2018; 19:187. [PMID: 29514634 DOI: 10.1186/s12864-018-4520-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Background Because the cost of cereals is unstable and represents a large part of production charges for meat-type chicken, there is an urge to formulate alternative diets from more cost-effective feedstuff. We have recently shown that meat-type chicken source is prone to adapt to dietary starch substitution with fat and fiber. The aim of this study was to better understand the molecular mechanisms of this adaptation to changes in dietary energy sources through the fine characterization of transcriptomic changes occurring in three major metabolic tissues – liver, adipose tissue and muscle – as well as in circulating blood cells. Results We revealed the fine-tuned regulation of many hepatic genes encoding key enzymes driving glycogenesis and de novo fatty acid synthesis pathways and of some genes participating in oxidation. Among the genes expressed upon consumption of a high-fat, high-fiber diet, we highlighted CPT1A, which encodes a key enzyme in the regulation of fatty acid oxidation. Conversely, the repression of lipogenic genes by the high-fat diet was clearly associated with the down-regulation of SREBF1 transcripts but was not associated with the transcript regulation of MLXIPL and NR1H3, which are both transcription factors. This result suggests a pivotal role for SREBF1 in lipogenesis regulation in response to a decrease in dietary starch and an increase in dietary PUFA. Other prospective regulators of de novo hepatic lipogenesis were suggested, such as PPARD, JUN, TADA2A and KAT2B, the last two genes belonging to the lysine acetyl transferase (KAT) complex family regulating histone and non-histone protein acetylation. Hepatic glycogenic genes were also down-regulated in chickens fed a high-fat, high-fiber diet compared to those in chickens fed a starch-based diet. No significant dietary-associated variations in gene expression profiles was observed in the other studied tissues, suggesting that the liver mainly contributed to the adaptation of birds to changes in energy source and nutrients in their diets, at least at the transcriptional level. Moreover, we showed that PUFA deposition observed in the different tissues may not rely on transcriptional changes. Conclusion We showed the major role of the liver, at the gene expression level, in the adaptive response of chicken to dietary starch substitution with fat and fiber. Electronic supplementary material The online version of this article (10.1186/s12864-018-4520-5) contains supplementary material, which is available to authorized users.
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25
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Kim GC, Kim JS, Kim GM, Choi SY. Anti-adipogenic effects of Tropaeolum majus (nasturtium) ethanol extract on 3T3-L1 cells. Food Nutr Res 2017; 61:1339555. [PMID: 28659749 PMCID: PMC5475310 DOI: 10.1080/16546628.2017.1339555] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 06/04/2017] [Indexed: 11/02/2022] Open
Abstract
Background: Edible flowers, Tropaeolum majus has been used as a disinfectant and an antibiotic, and for wound healing, but the anti-obesity effects of this plant have not been reported previously Objective: We investigated the anti-adipogenic effects of T. majus ethanol extract (TME) on 3T3-L1 cells. Design: 3T3-L1 cells were differentiated in the presence of different concentrations of TME. Lipid accumulation levels were determined using Oil-Red O staining and a triglyceride content assay. Changes in the expression of proteins related to adipocyte differentiation in 3T3-L1 cells were determined by SDS-PAGE and western blotting. Results: The highest inhibition of lipid accumulation was observed at a TME concentration of 300 µg/mL. Additionally, TME concentrations ranging from 20 µg/mL to 500 µg/mL led to a decrease in the expression of adipocyte differentiation regulators, peroxisome proliferator-activated receptor γ, CCAAT element binding protein α, and sterol regulatory element binding transcription factor 1. This decrease was shown to be concentration-dependent. Discussion: Taken together, the results of this study demonstrate that TME inhibits lipid accumulation and reduces the expression PPARG, CEBPA, and SREBF1, which regulate adipocyte differentiation in 3T3-L1 cells. Conclusions: TME may be a potential novel therapeutic agent for the prevention and treatment of obesity.
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Affiliation(s)
- Gi-Chang Kim
- Department of Agrofood Resources, National Academy of Agricultural Science, Rural Development Administration, Wanju-gun, Republic of Korea
| | - Jin-Sook Kim
- Department of Agrofood Resources, National Academy of Agricultural Science, Rural Development Administration, Wanju-gun, Republic of Korea
| | - Gyoung-Mi Kim
- Department of Agrofood Resources, National Academy of Agricultural Science, Rural Development Administration, Wanju-gun, Republic of Korea
| | - Song-Yi Choi
- Department of Agrofood Resources, National Academy of Agricultural Science, Rural Development Administration, Wanju-gun, Republic of Korea
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26
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Steen VM, Skrede S, Polushina T, López M, Andreassen OA, Fernø J, Hellard SL. Genetic evidence for a role of the SREBP transcription system and lipid biosynthesis in schizophrenia and antipsychotic treatment. Eur Neuropsychopharmacol 2017; 27:589-598. [PMID: 27492885 DOI: 10.1016/j.euroneuro.2016.07.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 07/15/2016] [Accepted: 07/19/2016] [Indexed: 12/21/2022]
Abstract
Schizophrenia is a serious psychotic disorder, with disabling symptoms and markedly reduced life expectancy. The onset is usually in late adolescence or early adulthood, which in time overlaps with the maturation of the brain including the myelination process. Interestingly, there seems to be a link between myelin abnormalities and schizophrenia. The oligodendrocyte-derived myelin membranes in the CNS are highly enriched for lipids (cholesterol, phospholipids and glycosphingolipids), thereby pointing at lipid homeostasis as a relevant target for studying the genetics and pathophysiology of schizophrenia. The biosynthesis of fatty acids and cholesterol is regulated by the sterol regulatory element binding protein (SREBP) transcription factors SREBP1 and SREBP2, which are encoded by the SREBF1 and SREBF2 genes on chromosome 17p11.2 and 22q13.2, respectively. Here we review the evidence for the involvement of SREBF1 and SREBF2 as genetic risk factors in schizophrenia and discuss the role of myelination and SREBP-mediated lipid biosynthesis in the etiology, pathophysiology and drug treatment of schizophrenia.
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Affiliation(s)
- Vidar M Steen
- NORMENT, K.G. Jebsen Centre for Psychosis Research, Department of Clinical Science, University of Bergen, Bergen, Norway; Dr. Einar Martens Research Group for Biological Psychiatry, Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen, Norway.
| | - Silje Skrede
- NORMENT, K.G. Jebsen Centre for Psychosis Research, Department of Clinical Science, University of Bergen, Bergen, Norway; Dr. Einar Martens Research Group for Biological Psychiatry, Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen, Norway
| | - Tatiana Polushina
- NORMENT, K.G. Jebsen Centre for Psychosis Research, Department of Clinical Science, University of Bergen, Bergen, Norway; Dr. Einar Martens Research Group for Biological Psychiatry, Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen, Norway
| | - Miguel López
- Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela 15782, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela 15706, Spain
| | - Ole A Andreassen
- NORMENT, K.G. Jebsen Centre for Psychosis Research, Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway
| | - Johan Fernø
- NORMENT, K.G. Jebsen Centre for Psychosis Research, Department of Clinical Science, University of Bergen, Bergen, Norway; Dr. Einar Martens Research Group for Biological Psychiatry, Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen, Norway
| | - Stephanie Le Hellard
- NORMENT, K.G. Jebsen Centre for Psychosis Research, Department of Clinical Science, University of Bergen, Bergen, Norway; Dr. Einar Martens Research Group for Biological Psychiatry, Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen, Norway
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Yao DW, Luo J, He QY, Li J, Wang H, Shi HB, Xu HF, Wang M, Loor JJ. Characterization of the liver X receptor-dependent regulatory mechanism of goat stearoyl-coenzyme A desaturase 1 gene by linoleic acid. J Dairy Sci 2017; 99:3945-3957. [PMID: 26947306 DOI: 10.3168/jds.2015-10601] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 01/13/2016] [Indexed: 01/05/2023]
Abstract
Stearoyl-coenzyme A desaturase 1 (SCD1) is a key enzyme in the biosynthesis of palmitoleic and oleic acid. Although the transcriptional regulatory mechanism of SCD1 via polyunsaturated fatty acids (PUFA) has been extensively explored in nonruminants, the existence of such mechanism in ruminant mammary gland remains unknown. In this study, we used goat genomic DNA to clone and sequence a 1,713-bp fragment of the SCD1 5' flanking region. Deletion assays revealed a core region of the promoter located between -415 and -109 bp upstream of the transcription start site, and contained the highly conserved PUFA response region. An intact PUFA response region was required for the basal transcriptional activity of SCD1. Linoleic acid reduced endogenous expression of SCD1 and sterol regulatory element binding factor-1 (SREBF1) in goat mammary epithelial cells. Further analysis indicated that both the sterol response element (SRE) and the nuclear factor Y (NF-Y) binding site in the SCD1 promoter were responsible for the inhibition effect by linoleic acid, whereas the effect was abrogated once NF-Y was deleted. In addition, SRE and NF-Y were partly responsible for the transcriptional activation induced via the liver X receptor agonist T 4506585 (Sigma-Aldrich, St. Louis, MO). When goat mammary epithelial cells were cultured with linoleic acid, addition of T 4506585 markedly increased SCD1 transcription in controls, but had no effect on cells with a deleted SRE promoter. These results demonstrated that linoleic acid can regulate SCD1 expression at the transcriptional level through SRE and NF-Y in a liver X receptor-dependent fashion in the goat mammary gland.
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Affiliation(s)
- D W Yao
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - J Luo
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100.
| | - Q Y He
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - J Li
- College of Animal Science and Technology, Henan University of Animal Husbandry and Economy, Zhengzhou, Henan, P. R. China 450046
| | - H Wang
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - H B Shi
- College of Animal Sciences, Zhejiang Sci-Tech University, Hangzhou, P. R. China 310058
| | - H F Xu
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - M Wang
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China 712100
| | - J J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801.
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Ladeira MM, Schoonmaker JP, Gionbelli MP, Dias JCO, Gionbelli TRS, Carvalho JRR, Teixeira PD. Nutrigenomics and Beef Quality: A Review about Lipogenesis. Int J Mol Sci 2016; 17:ijms17060918. [PMID: 27294923 PMCID: PMC4926451 DOI: 10.3390/ijms17060918] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 05/06/2016] [Accepted: 05/17/2016] [Indexed: 01/07/2023] Open
Abstract
The objective of the present review is to discuss the results of published studies that show how nutrition affects the expression of genes involved in lipid metabolism and how diet manipulation might change marbling and composition of fat in beef. Several key points in the synthesis of fat in cattle take place at the molecular level, and the association of nutritional factors with the modulation of this metabolism is one of the recent targets of nutrigenomic research. Within this context, special attention has been paid to the study of nuclear receptors associated with fatty acid metabolism. Among the transcription factors involved in lipid metabolism, the peroxisome proliferator-activated receptors (PPARs) and sterol regulatory element-binding proteins (SREBPs) stand out. The mRNA synthesis of these transcription factors is regulated by nutrients, and their metabolic action might be potentiated by diet components and change lipogenesis in muscle. Among the options for dietary manipulation with the objective to modulate lipogenesis, the use of different sources of polyunsaturated fatty acids, starch concentrations, forage ratios and vitamins stand out. Therefore, special care must be exercised in feedlot feed management, mainly when the goal is to produce high marbling beef.
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Affiliation(s)
- Marcio M Ladeira
- Department of Animal Science, Universidade Federal de Lavras, Lavras 37200-000, Brazil.
| | - Jon P Schoonmaker
- Department of Animal Science, Purdue University, West Lafayette, IN 47906, USA.
| | - Mateus P Gionbelli
- Department of Animal Science, Universidade Federal de Lavras, Lavras 37200-000, Brazil.
| | - Júlio C O Dias
- Department of Animal Science, Universidade Federal de Lavras, Lavras 37200-000, Brazil.
| | | | | | - Priscilla D Teixeira
- Department of Animal Science, Universidade Federal de Lavras, Lavras 37200-000, Brazil.
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Abstract
Mitochondrial quality control has an impact on many diseases, but intense research has focused on the action of 2 genes linked to heritable forms of Parkinson disease (PD), PINK1 and PARK2/parkin, which act in a common pathway to promote mitophagy. However, criticism has been raised that little evidence links this mechanism to sporadic PD. To gain a greater insight into the mechanisms of PINK1-PARK2 mediated mitophagy, we undertook a genome-wide RNAi screen in Drosophila and human cell models. Strikingly, we discovered several components of the lipogenesis pathway, including SREBF1, playing a conserved role in mitophagy. Our results suggest that lipids influence the stabilization of PINK1 during the initiation of mitophagy. Importantly, SREBF1 has previously been identified as a risk locus for sporadic PD, and thus implicates aberrant mitophagy as contributing to sporadic PD. Our findings suggest a role for lipid synthesis in PINK1-PARK2 mediated mitophagy, and propose a mechanistic link between familial and sporadic PD, supporting a common etiology.
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Affiliation(s)
- Rachael M Ivatt
- MRC Centre for Developmental and Biomedical Genetics; Sheffield, UK; Department of Biomedical Science; University of Sheffield; Sheffield, UK
| | - Alexander J Whitworth
- MRC Centre for Developmental and Biomedical Genetics; Sheffield, UK; Department of Biomedical Science; University of Sheffield; Sheffield, UK
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Bouchard-Mercier A, Rudkowska I, Lemieux S, Couture P, Vohl MC. Polymorphisms, de novo lipogenesis, and plasma triglyceride response following fish oil supplementation. J Lipid Res 2013; 54:2866-73. [PMID: 23886516 DOI: 10.1194/jlr.m041590] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Interindividual variability in the response of plasma triglyceride concentrations (TG) following fish oil consumption has been observed. Our objective was to examine the associations between single-nucleotide polymorphisms (SNPs) within genes encoding proteins involved in de novo lipogenesis and the relative change in plasma TG levels following a fish oil supplementation. Two hundred and eight participants were recruited in the greater Quebec City area. The participants completed a six-week fish oil supplementation (5 g fish oil/day: 1.9-2.2 g eicosapentaenoic acid and 1.1 g docosahexaenoic acid. SNPs within SREBF1, ACLY, and ACACA genes were genotyped using TAQMAN methodology. After correction for multiple comparison, only two SNPs, rs8071753 (ACLY) and rs1714987 (ACACA), were associated with the relative change in plasma TG concentrations (P = 0.004 and P = 0.005, respectively). These two SNPs explained 7.73% of the variance in plasma TG relative change following fish oil consumption. Genotype frequencies of rs8071753 according to the TG response groups (responders versus nonresponders) were different (P = 0.02). We conclude that the presence of certain SNPs within genes, such as ACLY and ACACA, encoding proteins involved in de novo lipogenesis seem to influence the plasma TG response following fish oil consumption.
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Affiliation(s)
- Annie Bouchard-Mercier
- Institute of Nutrition and Functional Foods (INAF) Laval University, Quebec, G1V 0A6, Canada
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