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Yang M, Xu X, Zhao XA, Ge YN, Qin J, Wang XY, Dai HL, Jia J, Tao SM. Comprehensive Analysis of Immune Cell Infiltration and M2-Like Macrophage Biomarker Expression Patterns in Atrial Fibrillation. Int J Gen Med 2024; 17:3147-3169. [PMID: 39049829 PMCID: PMC11268662 DOI: 10.2147/ijgm.s462895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 07/03/2024] [Indexed: 07/27/2024] Open
Abstract
Background Macrophages play a crucial role in the progression of AF, closely linked to atrial inflammation and myocardial fibrosis. However, the functions and molecular mechanisms of different phenotypic macrophages in AF are not well understood. This study aims to analyze the infiltration characteristics of atrial immune cells in AF patients and further explore the role and molecular expression patterns of M2 macrophage-related genes in AF. Methods This study integrates single-cell and large-scale sequencing data to analyze immune cell infiltration and molecular characterization of the LAA in patients with AF, using SR as a control group. CIBERSORT assesses immune cell types in LAA tissues; WGCNA identifies signature genes; cell clustering analyzes cell types and subpopulations; cell communication explores macrophage interactions; hdWGCNA identifies M2 macrophage gene modules in AF. AF biomarkers are identified using LASSO and Random Forest, validated with ROC curves and RT-qPCR. Potential molecular mechanisms are inferred through TF-miRNA-mRNA networks and single-gene enrichment analyses. Results Myeloid cell subsets varied considerably between the AF and SR groups, with a significant increase in M2 macrophages in the AF group. Signals of inflammation and matrix remodeling were observed in AF. M2 macrophage-related genes IGF1, PDK4, RAB13, and TMEM176B were identified as AF biomarkers, with RAB13 and TMEM176B being novel markers. A TF-miRNA-mRNA network was constructed using target genes, which are enriched in the PPAR signaling pathway and fatty acid metabolism. Conclusion Over infiltration of M2 macrophages may be an important factor in the progression of AF. The M2 macrophage-related genes IGF1, RAB13, TMEM176B and PDK4 may regulate the progression of AF through the PPAR signaling pathway and fatty acid metabolism.
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Affiliation(s)
- Man Yang
- Department of Cardiology, The Affiliated Hospital of Yunnan University, Kunming City, Yunnan Province, People’s Republic of China
- School of Medicine, Dali University, Dali City, Yunnan Province, People’s Republic of China
- Department of Cardiology, The First People’s Hospital of Dali, Dali City, Yunnan Province, People’s Republic of China
| | - Xiang Xu
- School of Medicine, Yunnan University, Kunming City, Yunnan Province, People’s Republic of China
- Department of Cardiology, The Second Affiliated Hospital of Kunming Medical University, Kunming City, Yunnan Province, People’s Republic of China
| | - Xing-an Zhao
- Department of Cardiology, The Affiliated Hospital of Yunnan University, Kunming City, Yunnan Province, People’s Republic of China
- School of Medicine, Dali University, Dali City, Yunnan Province, People’s Republic of China
| | - Yun-na Ge
- Department of Cardiology, The Affiliated Hospital of Yunnan University, Kunming City, Yunnan Province, People’s Republic of China
- School of Medicine, Dali University, Dali City, Yunnan Province, People’s Republic of China
| | - Juan Qin
- Department of Cardiology, The Affiliated Hospital of Yunnan University, Kunming City, Yunnan Province, People’s Republic of China
| | - Xi-ya Wang
- Department of Cardiology, The Affiliated Hospital of Yunnan University, Kunming City, Yunnan Province, People’s Republic of China
- School of Medicine, Dali University, Dali City, Yunnan Province, People’s Republic of China
| | - Hua-lei Dai
- Department of Cardiology, The Affiliated Hospital of Yunnan University, Kunming City, Yunnan Province, People’s Republic of China
| | - Ji Jia
- Department of Cardiology, The Affiliated Hospital of Yunnan University, Kunming City, Yunnan Province, People’s Republic of China
| | - Si-ming Tao
- Department of Cardiology, The Affiliated Hospital of Yunnan University, Kunming City, Yunnan Province, People’s Republic of China
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Hager S, Fittler FJ, Wagner E, Bros M. Nucleic Acid-Based Approaches for Tumor Therapy. Cells 2020; 9:E2061. [PMID: 32917034 PMCID: PMC7564019 DOI: 10.3390/cells9092061] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/06/2020] [Accepted: 09/07/2020] [Indexed: 12/24/2022] Open
Abstract
Within the last decade, the introduction of checkpoint inhibitors proposed to boost the patients' anti-tumor immune response has proven the efficacy of immunotherapeutic approaches for tumor therapy. Furthermore, especially in the context of the development of biocompatible, cell type targeting nano-carriers, nucleic acid-based drugs aimed to initiate and to enhance anti-tumor responses have come of age. This review intends to provide a comprehensive overview of the current state of the therapeutic use of nucleic acids for cancer treatment on various levels, comprising (i) mRNA and DNA-based vaccines to be expressed by antigen presenting cells evoking sustained anti-tumor T cell responses, (ii) molecular adjuvants, (iii) strategies to inhibit/reprogram tumor-induced regulatory immune cells e.g., by RNA interference (RNAi), (iv) genetically tailored T cells and natural killer cells to directly recognize tumor antigens, and (v) killing of tumor cells, and reprograming of constituents of the tumor microenvironment by gene transfer and RNAi. Aside from further improvements of individual nucleic acid-based drugs, the major perspective for successful cancer therapy will be combination treatments employing conventional regimens as well as immunotherapeutics like checkpoint inhibitors and nucleic acid-based drugs, each acting on several levels to adequately counter-act tumor immune evasion.
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Affiliation(s)
- Simone Hager
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University (LMU), 81377 Munich, Germany;
| | | | - Ernst Wagner
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University (LMU), 81377 Munich, Germany;
| | - Matthias Bros
- Department of Dermatology, University Medical Center, 55131 Mainz, Germany;
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