1
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Yuan S, Straub AC. STING inhibition enables efficient plasmid-based gene expression in primary vascular cells: A simple and cost-effective transfection protocol. PLoS One 2024; 19:e0303472. [PMID: 38990864 DOI: 10.1371/journal.pone.0303472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 04/25/2024] [Indexed: 07/13/2024] Open
Abstract
Plasmid transfection in cells is widely employed to express exogenous proteins, offering valuable mechanistic insight into their function(s). However, plasmid transfection efficiency in primary vascular endothelial cells (ECs) and smooth muscle cells (SMCs) is restricted with lipid-based transfection reagents such as Lipofectamine. The STING pathway, activated by foreign DNA in the cytosol, prevents foreign gene expression and induces DNA degradation. To address this, we explored the potential of STING inhibitors on the impact of plasmid expression in primary ECs and SMCs. Primary human aortic endothelial cells (HAECs) were transfected with a bicistronic plasmid expressing cytochrome b5 reductase 4 (CYB5R4) and enhanced green fluorescent protein (EGFP) using Lipofectamine 3000. Two STING inhibitors, MRT67307 and BX795, were added during transfection and overnight post-transfection. As a result, MRT67307 significantly enhanced CYB5R4 and EGFP expression, even 24 hours after its removal. In comparison, MRT67307 pretreatment did not affect transfection, suggesting the inhibitor's effect was readily reversible. The phosphorylation of endothelial nitric oxide synthase (eNOS) at Serine 1177 (S1177) by vascular endothelial growth factor is essential for endothelial proliferation, migration, and survival. Using the same protocol, we transfected wild-type and phosphorylation-incapable mutant (S1177A) eNOS in HAECs. Both forms of eNOS localized on the plasma membrane, but only the wild-type eNOS was phosphorylated by vascular endothelial growth factor treatment, indicating normal functionality of overexpressed proteins. MRT67307 and BX795 also improved plasmid expression in human and rat aortic SMCs. In conclusion, this study presents a modification enabling efficient plasmid transfection in primary vascular ECs and SMCs, offering a favorable approach to studying protein function(s) in these cell types, with potential implications for other primary cell types that are challenging to transfect.
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Affiliation(s)
- Shuai Yuan
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, United States of America
- Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Adam C Straub
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, United States of America
- Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Center for Microvascular Research, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
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2
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Feng D, Zhao H, Wang Q, Wu J, Ouyang L, Jia S, Lu Q, Zhao M. Aberrant H3K4me3 modification of immune response genes in CD4 + T cells of patients with systemic lupus erythematosus. Int Immunopharmacol 2024; 130:111748. [PMID: 38432146 DOI: 10.1016/j.intimp.2024.111748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 01/17/2024] [Accepted: 02/21/2024] [Indexed: 03/05/2024]
Abstract
BACKGROUND Increasing evidence has highlighted the significant role of histone modifications in pathogenesis of systemic lupus erythematosus (SLE). However, few studies have comprehensively analyzed trimethylation of histone H3 lysine 4 (H3K4me3) features at specific immune gene loci in SLE patients. METHODS We conducted H3K4me3 chromatin immunoprecipitation sequencing (ChIP-seq) on CD4+ T cells from SLE patients and healthy controls (HC). Differential H3K4me3 peaks were identified, followed by enrichment analysis. We integrated online RNA-seq and DNA methylation datasets to explore the relationship between H3K4me3 modification, DNA methylation and gene expression. We validated several upregulated peak regions by ChIP-qPCR and confirmed their impact on gene expression using RT-qPCR. Finally, we investigated the impact of H3K4 methyltransferases KMT2A on the expression of immune response genes. RESULTS we identified 147 downregulated and 2701 upregulated H3K4me3 peaks in CD4+ T cells of SLE. The upregulated peaks primarily classified as gained peaks and enriched in immune response genes such as FCGR2A, C5AR1, SERPING1 and OASL. Genes with upregulated H3K4me3 and downregulated DNA methylations in the promoter were highly expressed in SLE patients. These genes, including OAS1, IFI27 and IFI44L, were enriched in immune response pathways. The IFI44L locus also showed increased H3K27ac modification, chromatin accessibility and chromatin interactions in SLE. Moreover, knockdown of KMT2A can downregulate the expression of immune response genes in T cells. CONCLUSION Our study uncovers dysregulated H3K4me3 modification patterns in immune response genes loci, which also exhibit downregulated DNA methylation and higher mRNA expression in CD4+ T cells of SLE patients.
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Affiliation(s)
- Delong Feng
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Hongjun Zhao
- Department of Rheumatology, Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Qian Wang
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Jiali Wu
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Lianlian Ouyang
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Sujie Jia
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China
| | - Qianjin Lu
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China; Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Institute of Dermatology, Chinese Academy of Medical Sciences, Nanjing, Jiangsu, China
| | - Ming Zhao
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China; Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Institute of Dermatology, Chinese Academy of Medical Sciences, Nanjing, Jiangsu, China.
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3
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Costin C, Morgan G, Khojah A, Klein-Gitelman M, Pachman LM. Lower NK cell numbers in children with untreated juvenile dermatomyositis during the COVID-19 pandemic. CLINICAL IMMUNOLOGY COMMUNICATIONS 2023; 3:42-45. [PMID: 38014397 PMCID: PMC9938532 DOI: 10.1016/j.clicom.2023.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 02/15/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023]
Abstract
RNA viruses have been posited as triggers for Juvenile Dermatomyositis (JDM). The COVID-19 pandemic proved a unique opportunity to observe the effect of a novel RNA virus on JDM incidence and phenotype. We found the incidence of JDM increased from average of 6.9 cases per year from 2012 to 2019 to 9 cases per year from 2020 to 2021. We compared markers of disease activity in the patients diagnosed with JDM prior to and during the pandemic and found that patients diagnosed with JDM during the pandemic had significantly lower average NK cell counts 90.75(± 76) vs 163(±120) (P = 0.038) and NK cell percentage 3.63% (±2.3) vs. 6.6% (±4.1), (P = 0.008). Other markers of JDM did not significantly change. This study suggests that COVID-19 may be a viral trigger for JDM in selected cases and that NK cell dysregulation may be of particular interest in future research of virally triggered JDM.
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Affiliation(s)
- Christopher Costin
- Division of Pediatric Rheumatology, Ann and Robert H. Lurie Children's Hospital of Chicago, and Northwestern University Feinberg School of Medicine, 225 East Chicago Ave, Box 50, Chicago IL, USA
| | - Gabrielle Morgan
- Division of Pediatric Rheumatology, Ann and Robert H. Lurie Children's Hospital of Chicago, and Northwestern University Feinberg School of Medicine, 225 East Chicago Ave, Box 50, Chicago IL, USA
| | - Amer Khojah
- Pediatric Department, College of Medicine, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Marisa Klein-Gitelman
- Division of Pediatric Rheumatology, Ann and Robert H. Lurie Children's Hospital of Chicago, and Northwestern University Feinberg School of Medicine, 225 East Chicago Ave, Box 50, Chicago IL, USA
| | - Lauren M Pachman
- Division of Pediatric Rheumatology, Ann and Robert H. Lurie Children's Hospital of Chicago, and Northwestern University Feinberg School of Medicine, 225 East Chicago Ave, Box 50, Chicago IL, USA
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4
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Sanfilippo C, Castrogiovanni P, Imbesi R, Musumeci G, Vecchio M, Li Volti G, Tibullo D, Broggi G, Caltabiano R, Ulivieri M, Kazakova M, Parenti R, Vicario N, Fazio F, Di Rosa M. Sex-dependent neuro-deconvolution analysis of Alzheimer's disease brain transcriptomes according to CHI3L1 expression levels. J Neuroimmunol 2022; 373:577977. [PMID: 36228382 DOI: 10.1016/j.jneuroim.2022.577977] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/29/2022] [Accepted: 10/01/2022] [Indexed: 11/07/2022]
Abstract
Glial activation and related neuroinflammatory processes play a key role in the aging and progression of Alzheimer's disease (AD). CHI3L1/ YKL40 is a widely investigated chitinase in neurodegenerative diseases and recent studies have shown its involvement in aging and AD. Nevertheless, the biological function of CHI3L1 in AD is still unknown. Here, we collected microarray datasets from the National Center for Biotechnology Information (NCBI) brain samples of not demented healthy controls (NDHC) who died from causes not attributable to neurodegenerative disorders (n = 460), and of deceased patients suffering from Alzheimer's disease (AD) (n = 697). The NDHC and AD patients were stratified according to CHI3L1 expression levels as a cut-off. We identified two groups both males and females, subsequently used for our statistical comparisons: the high CHI3L1 expression group (HCEG) and the low CHI3L1 expression group (LCEG). Comparing HCEG to LCEG, we attained four signatures according to the sex of patients, in order to identify the healthy and AD brain cellular architecture, performing a genomic deconvolution analysis. We used neurological signatures (NS) belonging to six neurological cells populations and nine signatures that included the main physiological neurological processes. We discovered that, in the brains of NDHC the high expression levels of CHI3L1 were associated with astrocyte activation profile, while in AD males and females we showed an inflammatory profile microglia-mediated. The low CHI3L1 brain expression levels in NDHC and AD patients highlighted a neuronal activation profile. Furthermore, using drugs opposing CHI3L1 transcriptomic signatures, we found a specific drug profile for AD males and females characterized by high levels of CHI3L1 composed of fostamatinib, rucaparib, cephaeline, prednisolone, and dinoprostone. Brain levels of CHI3L1 in AD patients represent a biological signature that allows distinguishing between males and females and their likely cellular brain architecture.
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Affiliation(s)
- Cristina Sanfilippo
- Neurologic Unit, AOU "Policlinico-San Marco", Department of Medical, Surgical Sciences and Advanced Technologies, GF, Ingrassia, University of Catania, Via Santa Sofia n.78, 95100 Catania, Sicily, Italy
| | - Paola Castrogiovanni
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, 95125 Catania, Italy
| | - Rosa Imbesi
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, 95125 Catania, Italy
| | - Giuseppe Musumeci
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, 95125 Catania, Italy
| | - Michele Vecchio
- Rehabilitation Unit, "AOU Policlinico Vittorio Emanuele", Department of Biomedical and Biotechnological Sciences, Section of Pharmacology, University of Catania, Catania 95123, Italy
| | - Giovanni Li Volti
- Department of Biomedical and Biotechnological Sciences, Section of Biochemistry, University of Catania, 95123, Catania, Italy
| | - Daniele Tibullo
- Department of Biomedical and Biotechnological Sciences, Section of Biochemistry, University of Catania, 95123, Catania, Italy
| | - Giuseppe Broggi
- Department of Medical and Surgical Sciences and Advanced Technologies "G. F. Ingrassia", Anatomic Pathology, University of Catania, 95123, Catania, Italy
| | - Rosario Caltabiano
- Department of Medical and Surgical Sciences and Advanced Technologies "G. F. Ingrassia", Anatomic Pathology, University of Catania, 95123, Catania, Italy
| | - Martina Ulivieri
- University of California San Diego, Department of Psychiatry, Health Science, San Diego, La Jolla, CA, USA
| | - Maria Kazakova
- Department of Medical Biology, Medical University, Plovdiv, 4002 Plovdiv, Bulgaria; Research Institute, Medical University-, Plovdiv, 4002 Plovdiv, Bulgaria
| | - Rosalba Parenti
- Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
| | - Nunzio Vicario
- Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
| | - Francesco Fazio
- University of California San Diego, Department of Psychiatry, Health Science, San Diego, La Jolla, CA, USA
| | - Michelino Di Rosa
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, 95125 Catania, Italy.
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5
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Gao L, Ren R, Shen J, Hou J, Ning J, Feng Y, Wang M, Wu L, Sun Y, Wang H, Wang D, Cao J. Values of OAS gene family in the expression signature, immune cell infiltration and prognosis of human bladder cancer. BMC Cancer 2022; 22:1016. [PMID: 36162993 PMCID: PMC9510761 DOI: 10.1186/s12885-022-10102-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 09/15/2022] [Indexed: 12/24/2022] Open
Abstract
Background Bladder cancer (BLCA) is one of the most common genitourinary malignancies in the world, but its pathogenic genes have not been fully identified and the treatment outcomes are still unsatisfactory. Although the members of 2', 5'-oligoadenylate synthetase (OAS) gene family are known involved in some tumorous biological processes, the roles of the OAS gene family in BLCA are still undetermined. Methods By combining vast bioinformatic datasets analyses of BLCA and the experimental verification on clinical BLCA specimen, we identified the expressions and biological functions of OAS gene family members in BLCA with comparison to normal bladder tissues. Results The expression levels of OAS gene family members were higher in BLCA than in normal bladder tissues. The expression levels of most OAS genes had correlations with genomic mutation and methylation, and with the infiltration levels of CD4 + T cells, CD8 + T cells, neutrophils, and dendritic cells in the microenvironment of BLCA. In addition, high expressions of OAS1, OAS2, OAS3, and OASL predicted better overall survival in BLCA patients. Conclusions The highly expressed OAS genes in BLCA can reflect immune cells infiltration in the tumor microenvironment and predict the better overall survival of BLCA, and thus may be considered as a signature of BLCA. The study provides new insights into the diagnosis, treatment, and prognosis of BLCA. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-022-10102-8.
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Affiliation(s)
- Lijuan Gao
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China.,Department of Physiology, Shanxi Medical University, Taiyuan, 030001, Shanxi Province, China
| | - Ruimin Ren
- Department of Urology, Shanxi Bethune Hospital (Third Hospital of Shanxi Medical University), Taiyuan, 030032, China
| | - Jing Shen
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China.,Department of Physiology, Shanxi Medical University, Taiyuan, 030001, Shanxi Province, China
| | - Jiayi Hou
- Department of Clinical Laboratory, Shanxi Provincial Academy of Traditional Chinese Medicine, Taiyuan, 030012, China
| | - Junya Ning
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China.,Department of Physiology, Shanxi Medical University, Taiyuan, 030001, Shanxi Province, China
| | - Yanlin Feng
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China.,Department of Physiology, Shanxi Medical University, Taiyuan, 030001, Shanxi Province, China
| | - Meiyue Wang
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China.,Department of Physiology, Shanxi Medical University, Taiyuan, 030001, Shanxi Province, China
| | - Lifei Wu
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China
| | - Yaojun Sun
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China.,Department of Physiology, Shanxi Medical University, Taiyuan, 030001, Shanxi Province, China
| | - Huang Wang
- Department of Urology, Shanxi Bethune Hospital (Third Hospital of Shanxi Medical University), Taiyuan, 030032, China
| | - Deping Wang
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China. .,Department of Physiology, Shanxi Medical University, Taiyuan, 030001, Shanxi Province, China.
| | - Jimin Cao
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China. .,Department of Physiology, Shanxi Medical University, Taiyuan, 030001, Shanxi Province, China.
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6
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Gao LJ, Li JL, Yang RR, He ZM, Yan M, Cao X, Cao JM. Biological Characterization and Clinical Value of OAS Gene Family in Pancreatic Cancer. Front Oncol 2022; 12:884334. [PMID: 35719943 PMCID: PMC9205247 DOI: 10.3389/fonc.2022.884334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 04/25/2022] [Indexed: 12/20/2022] Open
Abstract
Background OAS gene family plays an important role in antiviral process, but its role in pancreatic cancer has not yet been studied. Methods We analyzed the expression, prognostic value and biological function of the OAS gene family in human pancreatic cancer through comprehensive bioinformatic analysis and cellular level validation. Results OAS family was highly expressed in pancreatic cancer, and this high expression significantly affected the clinical stage and prognosis of the tumor. OAS gene family was closely related to the immune infiltration of pancreatic cancer, especially neutrophils and dendritic cells, and many immune-related factors and pathways are enriched in the tumor, such as type I interferon signaling pathway and NOD-like receptor signaling pathway. Conclusion Taken together, high expression of OAS family is closely related to poor prognosis of pancreatic cancer. OAS gene family may serve as the biomarker and even therapeutic target of pancreatic cancer.
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Affiliation(s)
- Li-Juan Gao
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Jia-Lei Li
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Rui-Rui Yang
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Zhong-Mei He
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Min Yan
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Xia Cao
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China
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7
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Sagulkoo P, Plaimas K, Suratanee A, Colado Simão AN, Vissoci Reiche EM, Maes M. Immunopathogenesis and immunogenetic variants in COVID-19. Curr Pharm Des 2022; 28:1780-1797. [DOI: 10.2174/1381612828666220519150821] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 03/24/2022] [Indexed: 11/22/2022]
Abstract
Abstract:
Coronavirus disease 2019 (COVID-19) continues to spread globally despite the discovery of vaccines. Many people die due to COVID-19 as a result of catastrophic consequences, such as acute respiratory distress syndrome, pulmonary embolism, and disseminated intravascular coagulation caused by a cytokine storm. Immunopathology and immunogenetic research may assist in diagnosing, predicting, and treating severe COVID-19 and the cytokine storm associated with COVID-19. This paper reviews the immunopathogenesis and immunogenetic variants that play a role in COVID-19. Although various immune-related genetic variants have been investigated in relation to severe COVID-19, the NOD-like receptor protein 3 (NLRP3) and interleukin 18 (IL-18) have not been assessed for their potential significance in the clinical outcome. Here, we a) summarize the current understanding of the immunogenetic etiology and pathophysiology of COVID-19 and the associated cytokine storm; and b) construct and analyze protein-protein interaction (PPI) networks (using enrichment and annotation analysis) based on the NLRP3 and IL18 variants and all genes, which were established in severe COVID-19. Our PPI network and enrichment analyses predict a) useful drug targets to prevent the onset of severe COVID-19 including key antiviral pathways such as Toll-Like-Receptor cascades, NOD-like receptor signaling, RIG-induction of interferon (IFN) α/β, and interleukin (IL)-1, IL-6, IL-12, IL-18, and tumor necrosis factor signaling; and b) SARS-CoV-2 innate immune evasion and the participation of MYD88 and MAVS in the pathophysiology of severe COVID-19. The PPI network genetic variants may be used to predict more severe COVID-19 outcomes, thereby opening the door for targeted preventive treatments.
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Affiliation(s)
- Pakorn Sagulkoo
- Program in Bioinformatics and Computational Biology, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand
| | - Kitiporn Plaimas
- Department of Mathematics and Computer Science, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Apichat Suratanee
- Department of Mathematics, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand
| | - Andrea Name Colado Simão
- Department of Pathology Clinical Analysis and Toxicology, Health Sciences Center, Londrina State University, Londrina, Brazil
| | - Edna Maria Vissoci Reiche
- Department of Pathology Clinical Analysis and Toxicology, Health Sciences Center, Londrina State University, Londrina, Brazil
| | - Michael Maes
- Department of Psychiatry, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
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8
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Chen J, Wu Z, Wang J, Si X, Zhang R, Sun T, Dong Q, Wu W, Qiu Y. Docosahexaenoic acid ester of phloridzin reduces inflammation and insulin resistance via AMPK. Curr Pharm Des 2022; 28:1854-1862. [PMID: 35585811 DOI: 10.2174/1381612828666220518102440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 04/01/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND Docosahexaenoic acid-acylated phloridzin (PZ-DHA), a novel polyphenol fatty acid ester derivative, is synthesized through an acylation reaction of phloridzin (PZ) and docosahexaenoic acid (DHA). PZ-DHA is more stable than DHA and exhibits higher cellular uptake and bioavailability than PZ. OBJECTIVE To investigate the effects of PZ-DHA on insulin resistance in the skeletal muscle and the related mechanisms, we used palmitic acid (PA)-treated C2C12 myotubes as an insulin resistance model. RESULTS We found that PZ-DHA increased the activity of AMP-activated protein kinase (AMPK) and improved glucose uptake and mitochondrial function in an AMPK-dependent manner in untreated C2C12 myotubes. PZ-DHA treatment of the myotubes reversed PA-induced insulin resistance; this was indicated by increases in glucose uptake and the expression of membrane glucose transporter 4 (Glut4) and phosphorylated Akt. Moreover, PZ-DHA treatment reversed PA-induced inflammation and oxidative stress. These effects of PZ-DHA were mediated by AMPK. Furthermore, the increase in AMPK activity, improvement in insulin resistance, and decrease in inflammatory and oxidative responses after PZ-DHA treatment diminished upon co-treatment with a liver kinase B1 (LKB1) inhibitor, suggesting that PZ-DHA improved AMPK activity by regulating its upstream kinase, LKB1. CONCLUSION The effects of PZ-DHA on insulin resistance in C2C12 myotubes may be mediated by the LKB1-AMPK signaling pathway. Hence, PZ-DHA is a promising therapeutic agent for insulin resistance in type 2 diabetes.
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Affiliation(s)
- Jingqing Chen
- Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100193, China.,State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193, China
| | - Zhenlong Wu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193, China
| | - Jin Wang
- Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100193, China
| | - Xuemeng Si
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193, China
| | - Rui Zhang
- Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100193, China
| | - Tianqi Sun
- Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100193, China
| | - Qiaoyan Dong
- Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100193, China
| | - Wenqing Wu
- Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100193, China
| | - Yefeng Qiu
- Laboratory Animal Center of the Academy of Military Medical Sciences, Beijing, 100193, China
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9
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Huang YZ, Zheng YX, Zhou Y, Xu F, Cui YZ, Chen XY, Wang ZY, Yan BX, Zheng M, Man XY. OAS1, OAS2, and OAS3 Contribute to Epidermal Keratinocyte Proliferation by Regulating Cell Cycle and Augment Type I Interferon-Induced JAK1-STAT1 Phosphorylation in Psoriasis. J Invest Dermatol 2022; 142:2635-2645.e9. [PMID: 35305973 DOI: 10.1016/j.jid.2022.02.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 02/17/2022] [Accepted: 02/28/2022] [Indexed: 11/30/2022]
Abstract
Psoriasis is a systemic immune-mediated inflammatory disease characterized by hyperproliferation and abnormal differentiation of epidermal keratinocytes. Recent studies have identified IL-17 and IL-23 as key drivers of psoriasis pathogenesis, but the underlying molecular mechanisms remain unclear. The 2'-5'-oligoadenylate synthetases, namely, OAS1, OAS2, OAS3, and OASL, are a family of interferon-induced enzymes with multiple antiviral activities, but their role in psoriasis is unknown. Here, we identified overexpression of OAS1, OAS2, and OAS3 in human lesional psoriatic skin and serum and found that their expression was downregulated by biologics. Moreover, OASs were highly expressed in epidermal keratinocytes, epidermal dendritic cells, epidermal CD3+ T cells, dermal antigen-presenting cells, and dermal T cells from the psoriatic epidermis and dermis, as determined by flow cytometry. Additionally, OASs were upregulated by poly(I:C), poly(dA:dT), and type I IFNs but downregulated by JAK inhibitors in normal human epidermal keratinocytes. Furthermore, silencing of OASs inhibited the phosphorylation of JAK1 and STAT1. Knockdown of OASs suppressed keratinocyte proliferation by inhibiting cell cycle progression. Thus, OASs may be therapeutic biomarkers in psoriasis.
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Affiliation(s)
- Yan-Zhou Huang
- Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yu-Xin Zheng
- Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yuan Zhou
- Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Fan Xu
- Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Ying-Zhe Cui
- Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xue-Yan Chen
- Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhao-Yuan Wang
- Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Bing-Xi Yan
- Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Min Zheng
- Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiao-Yong Man
- Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
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10
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Identification of Latent Diagnostic Biomarkers and Biological Pathways in Dermatomyositis Based on WGCNA. JOURNAL OF ONCOLOGY 2022; 2021:1920111. [PMID: 35003257 PMCID: PMC8736700 DOI: 10.1155/2021/1920111] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/09/2021] [Accepted: 12/11/2021] [Indexed: 11/17/2022]
Abstract
Introduction Dermatomyositis (DM) is a chronic autoimmune disease of predominantly lymphocytic infiltration mainly involving the transverse muscle. Its pathogenesis is remaining unknown. This research is designed to probe the latent pathogenesis of dermatomyositis, identify potential biomarkers, and reveal the pathogenesis of dermatomyositis through information biology analysis of gene chips. Methods In this study, we utilised the GSE14287 and GSE11971 datasets rooted in the Gene Expression Omnibus (GEO) databank, which included a total of 62 DM samples and 9 normal samples. The datasets were combined, and the differentially expressed gene sets were subjected to weighted gene coexpression network analysis, and the hub gene was screened using a protein interaction network from genes in modules highly correlated with dermatomyositis progression. Results A total of 3 key genes-myxovirus resistance-2 (MX2), oligoadenylate synthetase 1 (OAS1), and oligoadenylate synthetase 2 (OAS2)-were identified in combination with cell line samples, and the expressions of the 3 genes were verified separately. The results showed that MX2, OAS1, and OAS2 were highly expressed in LPS-treated cell lines compared to normal cell lines. The results of pathway enrichment analysis of the genes indicated that all 3 genes were enriched in the cytosolic DNA signalling and cytokine and cytokine receptor interaction signalling pathways; the results of functional enrichment analysis showed that all 3 were enriched in interferon-α response and interferon-γ response functions. Conclusions This is important for the study of the pathogenesis and objective treatment of dermatomyositis and provides important reference information for the targeted therapy of dermatomyositis.
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11
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Roberson EDO, Mesa RA, Morgan GA, Cao L, Marin W, Pachman LM. Transcriptomes of peripheral blood mononuclear cells from juvenile dermatomyositis patients show elevated inflammation even when clinically inactive. Sci Rep 2022; 12:275. [PMID: 34997119 PMCID: PMC8741808 DOI: 10.1038/s41598-021-04302-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 12/20/2021] [Indexed: 12/31/2022] Open
Abstract
In juvenile dermatomyositis (JDM), the most common pediatric inflammatory myopathy, weakness is accompanied by a characteristic rash that often becomes chronic and is associated with vascular damage. We hoped to understand the molecular underpinnings of JDM, particularly when untreated, which would facilitate the identification of novel mechanisms and clinical targets that might disrupt disease progression. We studied the RNA-Seq data from untreated JDM peripheral blood mononuclear cells (PBMCs; n = 11), PBMCs from a subset of the same patients when clinically inactive (n = 8/11), and separate samples of untreated JDM skin and muscle (n = 4 each). All JDM samples were compared to non-inflammatory control tissues. The untreated JDM PBMCs showed a strong signature for type1 interferon response, along with IL-1, IL-10, and NF-κB. Surprisingly, PBMCs from clinically inactive JDM individuals had persistent immune activation that was enriched for IL-1 signaling. JDM skin and muscle both showed evidence for type 1 interferon activation and genes related to antigen presentation and decreased expression of cellular respiration genes. Additionally, we found that PBMC gene expression correlates with disease activity scores (DAS; skin, muscle, and total domains) and with nailfold capillary end row loop number (an indicator of microvascular damage). This included otoferlin, which was significantly increased in untreated JDM PBMCs and correlated with all 3 DAS domains. Overall, these data demonstrate that PBMC transcriptomes are informative of molecular disruptions in JDM and provide transcriptional evidence of chronic inflammation despite clinical quiescence.
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Affiliation(s)
- Elisha D O Roberson
- Division of Rheumatology, Department of Medicine, Washington University, 660 South Euclid Avenue, MSC 8045-0020-10, St. Louis, MO, 63110, USA. .,Department of Genetics, Washington University, St. Louis, MO, USA.
| | - Rosana A Mesa
- Division of Rheumatology, Department of Medicine, Washington University, 660 South Euclid Avenue, MSC 8045-0020-10, St. Louis, MO, 63110, USA
| | - Gabrielle A Morgan
- Division of Pediatric Rheumatology, Ann & Robert H. Lurie Children's Hospital of Chicago, 225 East Chicago Avenue, Box 50, Chicago, IL, 60611, USA
| | - Li Cao
- Division of Rheumatology, Department of Medicine, Washington University, 660 South Euclid Avenue, MSC 8045-0020-10, St. Louis, MO, 63110, USA
| | - Wilfredo Marin
- Cure JM Center of Excellence in Juvenile Myositis (JM) Research and Care, Stanley Manne Children's Research Institute, Chicago, IL, USA
| | - Lauren M Pachman
- Division of Pediatric Rheumatology, Ann & Robert H. Lurie Children's Hospital of Chicago, 225 East Chicago Avenue, Box 50, Chicago, IL, 60611, USA. .,Cure JM Center of Excellence in Juvenile Myositis (JM) Research and Care, Stanley Manne Children's Research Institute, Chicago, IL, USA. .,Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
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12
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He Z, Zhou S, Yang M, Zhao Z, Mei Y, Xin Y, Zhao M, Wu H, Lu Q. Comprehensive analysis of epigenetic modifications and immune-cell infiltration in tissues from patients with systemic lupus erythematosus. Epigenomics 2021; 14:81-100. [PMID: 34913398 DOI: 10.2217/epi-2021-0318] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Aim: To explore potential abnormal epigenetic modifications and immune-cell infiltration in tissues from systemic lupus erythematosus (SLE) patients. Materials & methods: To utilize bioinformatics analysis and 'wet lab' methods to identify and verify differentially expressed genes in multiple targeted organs in SLE. Results: Seven key genes, IFI44, IFI44L, IFIT1, IFIT3, PLSCR1, RSAD2 and OAS2, which are regulated by epigenetics and may be involved in the pathogenesis of SLE, are identified by combined long noncoding RNA-miRNA-mRNA network analysis and DNA methylation analysis. The results of quantitative reverse transcription PCR, immunohistochemistry and DNA methylation analysis confirmed the potential of these genes as biomarkers. Conclusion: This study reveals the potential mechanisms in SLE from epigenetic modifications and immune-cell infiltration, providing diagnostic biomarkers and therapeutic targets for SLE.
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Affiliation(s)
- Zhenghao He
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha, 410000, Hunan, China
| | - Shihang Zhou
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha, 410000, Hunan, China
| | - Ming Yang
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha, 410000, Hunan, China
| | - Zhidan Zhao
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha, 410000, Hunan, China
| | - Yang Mei
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha, 410000, Hunan, China
| | - Yue Xin
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha, 410000, Hunan, China
| | - Ming Zhao
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha, 410000, Hunan, China
| | - Haijing Wu
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha, 410000, Hunan, China
| | - Qianjin Lu
- Department of Dermatology, Second Xiangya Hospital, Central South University, Hunan Key Laboratory of Medical Epigenomics, Changsha, 410000, Hunan, China.,Institute of Dermatology, Chinese Academy of Medical Sciences & Peking Union Medical College, Nanjing, 210028, China
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13
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Cai L, Wang Y, Wu J, Wu G. Hsa_circ_0008234 facilitates proliferation of cutaneous squamous cell carcinoma through targeting miR-127-5p to regulate ADCY7. Arch Dermatol Res 2021; 314:541-551. [PMID: 34143288 DOI: 10.1007/s00403-021-02261-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 04/28/2021] [Accepted: 06/11/2021] [Indexed: 12/11/2022]
Abstract
Cutaneous squamous cell carcinoma (cSCC) is the second most common skin malignant tumor with 25-50% of 5-year survival. There exist urgent needs for the identification of novel biomarkers for the diagnostic and therapeutic strategies of cSCC. The differentially expressed circRNAs in cSCC tissues and non-lesional skin tissues were obtained through analyzing the circular RNAs (circRNAs) microarray dataset GSE74758. The expression pattern of the indicated circRNAs in cSCC tissues was confirmed by qRT-PCR. FISH analysis was used to detect the location of hsa_circ_0008234 in cells. RIP experiment was used to detect the interaction between hsa_circ_0008234 and miR-127-5p. CCK-8 analysis and colony formation assay were used to detect the proliferation of cSCC cells. qRT-PCR and western blot were adopted to detect the expression of ACDY7. Three differential expressed circRNAs were obtained from the microarray data (GSE74758), and hsa_circ_0008234 was confirmed to be highly expressed in cSCC tissues by qRT-PCR. Hsa_circ_0008234 was mainly located in cytoplasm and stable in cSCC cells. RIP experiment revealed that hsa_circ_0008234 directly interacts with miR-127-5p in cSCC cells. Hsa_circ_0008234 increased the cell viability and colony formation of cSCC cells through acting as the sponge of miR-127-5p. MiR-127-5p inhibited the expression of ADCY7 in cSCC cells through binding the 3'UTR of ADCY7. Hsa_circ_0008234 was positively associated with ADCY7 expression in cSCC tissues. Hsa_circ_0008234 facilitates the proliferation of cSCC through targeting miR-127-5p to regulate ADCY7 expression and has the potential to be a novel therapeutic target for cSCC.
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Affiliation(s)
- Li Cai
- Department of Dermatology and Venereology, Hebei Provincial People' Hospital, Shijiazhuang, Hebei, 050011, P. R. China
| | - Yongqiang Wang
- Department of Dermatology and Venereology, Hebei Provincial People' Hospital, Shijiazhuang, Hebei, 050011, P. R. China
| | - Jian Wu
- Department of Dermatology and Venereology, Hebei Provincial People' Hospital, Shijiazhuang, Hebei, 050011, P. R. China
| | - Ganxun Wu
- Department of Otorhinolaryngology Head and Neck Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050017, P. R. China.
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14
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Juárez-Vicuña Y, Pérez-Ramos J, Adalid-Peralta L, Sánchez F, Martínez-Martínez LA, Ortiz-Segura MDC, Pichardo-Ontiveros E, Hernández-Díazcouder A, Amezcua-Guerra LM, Ramírez-Bello J, Sánchez-Muñoz F. Interferon Lambda 3/4 (IFNλ3/4) rs12979860 Polymorphisms Is Not Associated With Susceptibility to Systemic Lupus Erythematosus, Although It Regulates OASL Expression in Patients With SLE. Front Genet 2021; 12:647487. [PMID: 34149799 PMCID: PMC8206639 DOI: 10.3389/fgene.2021.647487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 04/21/2021] [Indexed: 12/13/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease with a complex etiology. Various genetic factors are associated with susceptibility to developing SLE and contribute to its onset and progression. Different single-nucleotide polymorphisms (SNPs) have been associated with SLE in several populations. The rs12979860 SNP in interferon lambda 3/4 (IFNλ3/4) is significantly associated with SLE susceptibility in patients negative for nephritis in Taiwanese people, and interferon-stimulated genes (ISGs) are differentially expressed in normal liver by the rs12979860 genotype. This study aimed to investigate whether rs12979860 is associated with the presence of SLE and lupus nephritis in Mexican individuals as well as with the expression of several ISGs in SLE patients. In total, 439 SLE patients and 358 healthy donors were genotyped for rs12979860 using real-time PCR, and allelic discrimination plots were constructed. Additionally, peripheral blood mononuclear cells (PBMCs) were isolated from the venous blood of SLE patients by centrifugation (n = 78). The mRNA levels of 2′-5′-oligoadenylate synthetase like (OASL), myxovirus resistance 1 (MX1), 2′5′-oligoadenylate synthetase 1 (OAS1), interferon-stimulated gene 15 (ISG15) and lymphocyte antigen 6 complex, locus E (LY6E) were determined using real-time PCR. The distributions of rs12979860 genotypes and allele frequencies were compared between SLE patients and healthy donors; case-control analysis revealed that rs12979860 was not associated with SLE susceptibility (OR 1.18, 95% CI 0.97–1.45, p = 0.08) or with the risk for lupus nephritis (OR 0.913, 95% CI 0.590–1.411, p = 0.682). However, OASL expression levels in PBMCs were significantly different between rs12979860 genotypes in SLE patients: median OASL mRNA levels were significantly higher in patients carrying the CC genotype (197.10, IQR 71.10–411.17) than in those with CT/TT genotypes (173.75, IQR 58.80–278.75, p = 0.016). Our results suggest that the SNP rs12979860 does not play a relevant role in susceptibility to SLE in Mexican individuals. However, IFNλ3/4 genotypes appear to be associated with OASL expression in PBMCs from patients with SLE.
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Affiliation(s)
- Yaneli Juárez-Vicuña
- Department of Immunology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Julia Pérez-Ramos
- Department of Biological Systems, Universidad Autónoma Metropolitana-Xochimilco, Mexico City, Mexico
| | - Laura Adalid-Peralta
- Unit for the Study of Neuroinflammation in Neurological Pathologies, Instituto de Investigaciones Biomédicas, Instituto Nacional de Neurología y Neurocirugía, Mexico City, Mexico
| | - Fausto Sánchez
- Department of Agricultural and Animal Production, Universidad Autónoma Metropolitana-Xochimilco, Mexico City, Mexico
| | | | | | - Edgar Pichardo-Ontiveros
- Department of Nutrition Physiology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | | | - Luis M Amezcua-Guerra
- Department of Immunology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico.,Department of Health Care, Universidad Autónoma Metropolitana-Xochimilco, Mexico City, Mexico
| | | | - Fausto Sánchez-Muñoz
- Department of Immunology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
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15
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Brain CHID1 Expression Correlates with NRGN and CALB1 in Healthy Subjects and AD Patients. Cells 2021; 10:cells10040882. [PMID: 33924468 PMCID: PMC8069241 DOI: 10.3390/cells10040882] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/06/2021] [Accepted: 04/12/2021] [Indexed: 12/14/2022] Open
Abstract
Alzheimer’s disease is a progressive, devastating, and irreversible brain disorder that, day by day, destroys memory skills and social behavior. Despite this, the number of known genes suitable for discriminating between AD patients is insufficient. Among the genes potentially involved in the development of AD, there are the chitinase-like proteins (CLPs) CHI3L1, CHI3L2, and CHID1. The genes of the first two have been extensively investigated while, on the contrary, little information is available on CHID1. In this manuscript, we conducted transcriptome meta-analysis on an extensive sample of brains of healthy control subjects (n = 1849) (NDHC) and brains of AD patients (n = 1170) in order to demonstrate CHID1 involvement. Our analysis revealed an inverse correlation between the brain CHID1 expression levels and the age of NDHC subjects. Significant differences were highlighted comparing CHID1 expression of NDHC subjects and AD patients. Exclusive in AD patients, the CHID1 expression levels were correlated positively to calcium-binding adapter molecule 1 (IBA1) levels. Furthermore, both in NDHC and in AD patient’s brains, the CHID1 expression levels were directly correlated with calbindin 1 (CALB1) and neurogranin (NRGN). According to brain regions, correlation differences were shown between the expression levels of CHID1 in prefrontal, frontal, occipital, cerebellum, temporal, and limbic system. Sex-related differences were only highlighted in NDHC. CHID1 represents a new chitinase potentially involved in the principal processes underlying Alzheimer’s disease.
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16
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Allred MG, Chimenti MS, Ciecko AE, Chen YG, Lieberman SM. Characterization of Type I Interferon-Associated Chemokines and Cytokines in Lacrimal Glands of Nonobese Diabetic Mice. Int J Mol Sci 2021; 22:ijms22073767. [PMID: 33916486 PMCID: PMC8038628 DOI: 10.3390/ijms22073767] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 03/30/2021] [Indexed: 12/12/2022] Open
Abstract
Type I interferons (IFNs) are required for spontaneous lacrimal gland inflammation in the nonobese diabetic (NOD) mouse model of Sjögren’s disease, but the consequences of type I IFN signaling are not well-defined. Here, we use RNA sequencing to define cytokine and chemokine genes upregulated in lacrimal glands of NOD mice in a type I IFN-dependent manner. Interleukin (IL)-21 was the highest differentially expressed cytokine gene, and Il21 knockout NOD mice were relatively protected from lacrimal gland inflammation. We defined a set of chemokines upregulated early in disease including Cxcl9 and Cxcl10, which share a receptor, CXCR3. CXCR3+ T cells were enriched in lacrimal glands with a dominant proportion of CXCR3+ regulatory T cells. Together these data define the early cytokine and chemokine signals associated with type I IFN-signaling in the development of lacrimal gland inflammation in NOD mice providing insight into the role of type I IFN in autoimmunity development.
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Affiliation(s)
- Merri-Grace Allred
- Stead Family Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA;
- Immunology Graduate Program, University of Iowa, Iowa City, IA 52242, USA
| | - Michael S. Chimenti
- Iowa Institute of Human Genetics, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA;
| | - Ashley E. Ciecko
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (A.E.C.); (Y.-G.C.)
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
- Max McGee National Research Center for Juvenile Diabetes, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Yi-Guang Chen
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (A.E.C.); (Y.-G.C.)
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
- Max McGee National Research Center for Juvenile Diabetes, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Scott M. Lieberman
- Stead Family Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA;
- Immunology Graduate Program, University of Iowa, Iowa City, IA 52242, USA
- Correspondence: ; Tel.: +1-319-467-5111
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17
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Pachman LM, Nolan BE, DeRanieri D, Khojah AM. Juvenile Dermatomyositis: New Clues to Diagnosis and Therapy. CURRENT TREATMENT OPTIONS IN RHEUMATOLOGY 2021; 7:39-62. [PMID: 34354904 PMCID: PMC8336914 DOI: 10.1007/s40674-020-00168-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2020] [Indexed: 12/12/2022]
Abstract
PURPOSE OF REVIEW To identify clues to disease activity and discuss therapy options. RECENT FINDINGS The diagnostic evaluation includes documenting symmetrical proximal muscle damage by exam and MRI, as well as elevated muscle enzymes-aldolase, creatine phosphokinase, LDH, and SGOT-which often normalize with a longer duration of untreated disease. Ultrasound identifies persistent, occult muscle inflammation. The myositis-specific antibodies (MSA) and myositis-associated antibodies (MAA) are associated with specific disease course variations. Anti-NXP-2 is found in younger children and is associated with calcinosis; anti-TIF-1γ+ juvenile dermatomyositis has a longer disease course. The diagnostic rash-involving the eyelids, hands, knees, face, and upper chest-is the most persistent symptom and is associated with microvascular compromise, reflected by loss of nailfold (periungual) end row capillaries. This loss is associated with decreased bioavailability of oral prednisone; the bioavailability of other orally administered medications should also be considered. At diagnosis, at least 3 days of intravenous methyl prednisolone may help control the HLA-restricted and type 1/2 interferon-driven inflammatory process. The requirement for avoidance of ultraviolet light exposure mandates vitamin D supplementation. SUMMARY This often chronic illness targets the cardiovascular system; mortality has decreased from 30 to 1-2% with corticosteroids. New serological biomarkers indicate occult inflammation: ↑CXCL-10 predicts a longer disease course. Some biologic therapies appear promising.
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Affiliation(s)
- Lauren M. Pachman
- Northwestern Feinberg School of Medicine, Divisions of Pediatric Rheumatology, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL, USA
- Cure JM Center of Excellence in Juvenile Myositis Research and Care, The Stanley Manne Research Center for Children, Chicago, IL, USA
| | - Brian E. Nolan
- Northwestern Feinberg School of Medicine, Divisions of Pediatric Rheumatology, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL, USA
| | - Deidre DeRanieri
- Northwestern Feinberg School of Medicine, Divisions of Pediatric Rheumatology, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL, USA
| | - Amer M. Khojah
- Northwestern Feinberg School of Medicine, Divisions of Pediatric Rheumatology, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL, USA
- Division of Allergy/Immunology, Chicago, IL, USA, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL, USA
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18
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Sanfilippo C, Musumeci G, Kazakova M, Mazzone V, Castrogiovanni P, Imbesi R, Di Rosa M. GNG13 Is a Potential Marker of the State of Health of Alzheimer's Disease Patients' Cerebellum. J Mol Neurosci 2020; 71:1046-1060. [PMID: 33057964 DOI: 10.1007/s12031-020-01726-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 10/01/2020] [Indexed: 12/12/2022]
Abstract
Brain regions such as the cerebellum (CB) have been neglected for a long time in the study of Alzheimer's disease (AD) pathogenesis. In reference to a new emerging hypothesis according to which there is an altered cerebellar synaptic processing in AD, we verified the possible role played by new biomarkers in the CB of AD patients compared with not-demented healthy control subjects (NDHS). Using a bioinformatics approach, we have collected several microarray datasets and obtained 626 cerebella sample biopsies belonging to subjects who did not die from causes related to neurological diseases and 199 cerebella belonging to AD. The analysis of logical relations between the transcriptome dataset highlighted guanine nucleotide-binding protein (G protein) gamma 13 (GNG13) as a potential new biomarker for Purkinje cells (PCs). We have correlated GNG13 expression levels with already widely existing bibliography of PC marker genes, such as Purkinje cell protein 2 (PCP2), Purkinje cell protein 4 (PCP4), and cerebellin 3 (CBLN3). We showed that expression levels of GNG13 and PCP2, PCP4, and CBLN3 were significantly correlated with each other in NDHS and in AD and significantly reduced in AD patients compared with NDHS subjects. In addition, we highlighted a negative correlation between the expression levels of PC biomarkers and age. From the outcome of our investigation, it is possible to conclude that the identification of GNG13 as a potentially biomarker in PCs represents also a state of health of CB, in association with the expression of PCP2, PCP4, and CBLN3.
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Affiliation(s)
- Cristina Sanfilippo
- IRCCS Centro Neurolesi Bonino Pulejo, Strada Statale 113, C.da Casazza, 98124, Messina, Italy
| | - Giuseppe Musumeci
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Catania, Italy
| | - Maria Kazakova
- Department of Medical Biology, Medical Faculty, Medical University, Plovdiv, Bulgaria
| | - Venera Mazzone
- Department G.F. Ingrassia, Anatomy, School of Medicine, University of Catania, Catania, Italy
| | - Paola Castrogiovanni
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Catania, Italy
| | - Rosa Imbesi
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Catania, Italy
| | - Michelino Di Rosa
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Catania, Italy.
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Immunoproteasome Genes Are Modulated in CD34 + JAK2 V617F Mutated Cells from Primary Myelofibrosis Patients. Int J Mol Sci 2020; 21:ijms21082926. [PMID: 32331228 PMCID: PMC7216198 DOI: 10.3390/ijms21082926] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 04/17/2020] [Accepted: 04/20/2020] [Indexed: 12/17/2022] Open
Abstract
Primary myelofibrosis (PMF) is a rare myeloproliferative neoplasm characterized by stem-cell-derived clonal over-proliferation of mature myeloid lineages, bone marrow fibrosis, osteosclerosis, defective erythropoiesis, and pro-inflammatory cytokine over-expression. The aim of the present study was to highlight possible differences in the transcriptome among CD34+ cells from peripheral blood (PB) of PMF patients. Therefore, we merged two microarray datasets of healthy control subjects and PMF (34 JAK2V617F MUTATED and 28 JAK2 wild-type). The GO analysis of upregulated genes revealed enrichment for JAK2/STAT1 pathway gene set in PB CD34+ cells of PMF patients with and without the JAK2V617F mutation comparing to the healthy control subjects, and in particular a significant upregulation of immunoproteasome (IP)-belonging genes as PSMB8, PSMB9, and PSMB10. A more detailed investigation of the IFN-gamma (IFNG) pathway also revealed that IFNG, IRF1, and IFNGR2 were significantly upregulated in PB CD34+ cells of PMF patients carrying the mutation for JAK2V617F compared to JAK2 wild-type PMF patients. Finally, we showed an upregulation of HLA-class I genes in PB CD34+ cells from PMF JAK2V617F mutated patients compared to JAK2 wild-type and healthy controls. In conclusion, our results demonstrate that IPs and IFNG pathways could be involved in PMF disease and in particular in patients carrying the JAK2V617F mutation.
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Zhong D, Wu C, Bai J, Xu D, Zeng X, Wang Q. Co-expression network analysis reveals the pivotal role of mitochondrial dysfunction and interferon signature in juvenile dermatomyositis. PeerJ 2020; 8:e8611. [PMID: 32110496 PMCID: PMC7034382 DOI: 10.7717/peerj.8611] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 01/21/2020] [Indexed: 12/14/2022] Open
Abstract
Background Juvenile dermatomyositis (JDM) is an immune-mediated disease characterized by chronic organ inflammation. The pathogenic mechanisms remain ill-defined. Methods Raw microarray data of JDM were obtained from the gene expression omnibus (GEO) database. Based on the GSE3307 dataset with 39 samples, weighted correlation network analysis (WGCNA) was performed to identify key modules associated with pathological state. Functional enrichment analyses were conducted to identify potential mechanisms. Based on the criteria of high connectivity and module membership, candidate hub genes were selected. A protein-protein interaction network was constructed to identify hub genes. Another dataset (GSE11971) was used for the validation of real hub genes. Finally, the real hub genes were used to screen out small-molecule compounds via the Connectivity map database. Results Three modules were considered as key modules for the pathological state of JDM. Functional enrichment analysis indicated that responses to interferon and metabolism were dysregulated. A total of 45 candidate hub genes were selected according to the pre-established criteria, and 20 genes could differentiate JDM from normal controls by validation of another external dataset (GSE11971). These real hub genes suggested the pivotal role of mitochondrial dysfunction and interferon signature in JDM. Furthermore, drug repositioning highlighted the importance of acacetin, helveticoside, lanatoside C, deferoxamine, LY-294002, tanespimycin and L01AD from downregulated genes with the potential to perturb the development of JDM, while betonicine, felodipine, valproic acid, trichostatin A and sirolimus from upregulated genes provided potentially therapeutic goals for JDM. Conclusions There are 20 real hub genes associated with the pathological state of JDM, suggesting the pivotal role of mitochondrial dysfunction and interferon signature in JDM. This analysis predicted several kinds of small-molecule compounds to treat JDM.
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Affiliation(s)
- Danli Zhong
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences; National Clinical Research Center for Dermatologic and Immunologic Diseases (NCRC-DID), Beijing, China.,Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing, China
| | - Chanyuan Wu
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences; National Clinical Research Center for Dermatologic and Immunologic Diseases (NCRC-DID), Beijing, China.,Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing, China
| | - Jingjing Bai
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences; National Clinical Research Center for Dermatologic and Immunologic Diseases (NCRC-DID), Beijing, China.,Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing, China
| | - Dong Xu
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences; National Clinical Research Center for Dermatologic and Immunologic Diseases (NCRC-DID), Beijing, China.,Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing, China
| | - Xiaofeng Zeng
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences; National Clinical Research Center for Dermatologic and Immunologic Diseases (NCRC-DID), Beijing, China.,Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing, China
| | - Qian Wang
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences; National Clinical Research Center for Dermatologic and Immunologic Diseases (NCRC-DID), Beijing, China.,Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing, China
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Guala D, Ogris C, Müller N, Sonnhammer ELL. Genome-wide functional association networks: background, data & state-of-the-art resources. Brief Bioinform 2019; 21:1224-1237. [PMID: 31281921 PMCID: PMC7373183 DOI: 10.1093/bib/bbz064] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 04/29/2019] [Accepted: 05/04/2019] [Indexed: 02/06/2023] Open
Abstract
The vast amount of experimental data from recent advances in the field of high-throughput biology begs for integration into more complex data structures such as genome-wide functional association networks. Such networks have been used for elucidation of the interplay of intra-cellular molecules to make advances ranging from the basic science understanding of evolutionary processes to the more translational field of precision medicine. The allure of the field has resulted in rapid growth of the number of available network resources, each with unique attributes exploitable to answer different biological questions. Unfortunately, the high volume of network resources makes it impossible for the intended user to select an appropriate tool for their particular research question. The aim of this paper is to provide an overview of the underlying data and representative network resources as well as to mention methods of integration, allowing a customized approach to resource selection. Additionally, this report will provide a primer for researchers venturing into the field of network integration.
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Affiliation(s)
- Dimitri Guala
- Science for Life Laboratory, Stockholm Bioinformatics Center, Department of Biochemistry and Biophysics, Stockholm University, Box 1031, 17121 Solna, Sweden
| | - Christoph Ogris
- Computational Cell Maps, Institute of Computational Biology, Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
| | - Nikola Müller
- Computational Cell Maps, Institute of Computational Biology, Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
| | - Erik L L Sonnhammer
- Science for Life Laboratory, Stockholm Bioinformatics Center, Department of Biochemistry and Biophysics, Stockholm University, Box 1031, 17121 Solna, Sweden
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22
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Zhang X, Yang P, Luo X, Su C, Chen Y, Zhao L, Wei L, Zeng H, Varghese Z, Moorhead JF, Ruan XZ, Chen Y. High olive oil diets enhance cervical tumour growth in mice: transcriptome analysis for potential candidate genes and pathways. Lipids Health Dis 2019; 18:76. [PMID: 30922331 PMCID: PMC6440132 DOI: 10.1186/s12944-019-1023-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 03/19/2019] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Numerous epidemiologic studies have found a close association between obesity and cancer. Dietary fat is a fundamental contributor to obesity and is a risk factor for cancer. Thus far, the impact of dietary olive oil on cancer development remains inconclusive, and little is known about its underlying mechanisms. METHODS Nude mouse xenograft models were used to examine the effects of high olive oil diet feeding on cervical cancer (CC) development and progression. Cell proliferation, migration and invasion were observed by the methods of EdU incorporation, Wound healing and Transwell assay, separately. RNA-sequencing technology and comprehensive bioinformatics analyses were used to elucidate the molecular processes regulated by dietary fat. Differentially expressed genes (DEGs) were identified and were functionally analyzed by Gene Ontology (GO), Kyoto Enrichment of Genes and Genomes (KEGG). Then, protein-protein interaction (PPI) network and sub-PPI network analyses were conducted using the STRING database and Cytoscape software. RESULTS A high olive oil diet aggravated tumourigenesis in an experimental xenograft model of CC. Oleic acid, the main ingredient of olive oil, promoted cell growth and migration in vitro. Transcriptome sequencing analysis of xenograft tumour tissues was then performed to elucidate the regulation of molecular events regulated by dietary fat. Dietary olive oil induced 648 DEGs, comprising 155 up-regulated DEGs and 493 down-regulated DEGs. GO and pathway enrichment analysis revealed that some of the DEGs including EGR1 and FOXN2 were involved in the transcription regulation and others, including TGFB2 and COL4A3 in cell proliferation. The 15 most strongly associated DEGs were selected from the PPI network and hub genes including JUN, TIMP3, OAS1, OASL and EGR1 were confirmed by real-time quantitative PCR analysis. CONCLUSIONS Our study suggests that a high olive oil diet aggravates CC progression in vivo and in vitro. We provide clues to build a potential link between dietary fat and cancerogenesis and identify areas requiring further investigation.
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Affiliation(s)
- Xiaoyu Zhang
- Centre for Lipid Research & Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China
| | - Ping Yang
- Centre for Lipid Research & Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China
| | - Xuan Luo
- Centre for Lipid Research & Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China
| | - Chunxiao Su
- Centre for Lipid Research & Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China
| | - Yao Chen
- Centre for Lipid Research & Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China
| | - Lei Zhao
- Centre for Lipid Research & Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China
| | - Li Wei
- Centre for Lipid Research & Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China
| | - Han Zeng
- Centre for Lipid Research & Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China
| | - Zac Varghese
- John Moorhead Research Laboratory, Centre for Nephrology, University College London Medical School, Royal Free Campus, University College London, NW3 2PF, London, UK
| | - John F Moorhead
- John Moorhead Research Laboratory, Centre for Nephrology, University College London Medical School, Royal Free Campus, University College London, NW3 2PF, London, UK
| | - Xiong Z Ruan
- Centre for Lipid Research & Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China. .,John Moorhead Research Laboratory, Centre for Nephrology, University College London Medical School, Royal Free Campus, University College London, NW3 2PF, London, UK.
| | - Yaxi Chen
- Centre for Lipid Research & Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China.
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