{"title":"Single-cell sequencing reveals the heterogeneity of immune landscape in drug users with HIV infection","authors":"","doi":"10.1016/j.intimp.2024.113338","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><div>Injection drug use (IDU) leads to immune system dysfunction, thereby increasing the risk of opportunistic infection. There is a critical need to reveal the role of IDU in the immunopathogenesis of HIV infection.</div></div><div><h3>Methods</h3><div>We performed single-cell RNA sequencing (scRNA-seq) on peripheral blood mononuclear cells (PBMCs) derived from healthy control (HC) individuals, HIV-infected patients with IDU (HIV-IDU) and without IDU (HIV-nIDU). In addition, the Gene Set Enrichment Analysis (GSEA) was used to analyze the immunomodulatory effects of differential immune cells.</div></div><div><h3>Results</h3><div>Seven types of cells were identified with specific expressions of maker genes. Specific subsets such as CD14<sup>+</sup> monocytes, plasmacytoid dendritic cells (pDCs), plasma cells, and CD8<sup>+</sup> T cells displayed a high degree of heterogeneity among HC, HIV-nIDU, and HIV-IDU. We identified signature genes for each subset in distinct groups, including <em>CFP</em><sup>+</sup> CD14<sup>+</sup> monocytes, <em>PTPRCAP</em><sup>+</sup> pDCs, <em>IGHD</em><sup>+</sup> plasma cells, and <em>IFITM1</em><sup>+</sup> CD8<sup>+</sup>T cells from HIV-IDU, whereas these genes were not expressed in such cells from HIV-nIDU. Moreover, considerable heterogeneity in the function of these immune cells was observed across different groups, especially the elevated IFN-α/β signaling for CD14<sup>+</sup> monocytes, histone H2A/2B and H3/4 pathway for pDCs, the creation of C4 and C2 activators for plasma cells, and drug metabolism cytochrome p450 for CD8<sup>+</sup> T cells in HIV-IDU individuals.</div></div><div><h3>Conclusion</h3><div>Our comprehensive analyses clarify the heterogeneous characteristics of the immune landscape between HIV-IDU and HIV-nIDU. These insights provide a deeper understanding of the IDU-mediated immunopathogenesis in HIV infection.</div></div>","PeriodicalId":13859,"journal":{"name":"International immunopharmacology","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International immunopharmacology","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1567576924018605","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"IMMUNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Background
Injection drug use (IDU) leads to immune system dysfunction, thereby increasing the risk of opportunistic infection. There is a critical need to reveal the role of IDU in the immunopathogenesis of HIV infection.
Methods
We performed single-cell RNA sequencing (scRNA-seq) on peripheral blood mononuclear cells (PBMCs) derived from healthy control (HC) individuals, HIV-infected patients with IDU (HIV-IDU) and without IDU (HIV-nIDU). In addition, the Gene Set Enrichment Analysis (GSEA) was used to analyze the immunomodulatory effects of differential immune cells.
Results
Seven types of cells were identified with specific expressions of maker genes. Specific subsets such as CD14+ monocytes, plasmacytoid dendritic cells (pDCs), plasma cells, and CD8+ T cells displayed a high degree of heterogeneity among HC, HIV-nIDU, and HIV-IDU. We identified signature genes for each subset in distinct groups, including CFP+ CD14+ monocytes, PTPRCAP+ pDCs, IGHD+ plasma cells, and IFITM1+ CD8+T cells from HIV-IDU, whereas these genes were not expressed in such cells from HIV-nIDU. Moreover, considerable heterogeneity in the function of these immune cells was observed across different groups, especially the elevated IFN-α/β signaling for CD14+ monocytes, histone H2A/2B and H3/4 pathway for pDCs, the creation of C4 and C2 activators for plasma cells, and drug metabolism cytochrome p450 for CD8+ T cells in HIV-IDU individuals.
Conclusion
Our comprehensive analyses clarify the heterogeneous characteristics of the immune landscape between HIV-IDU and HIV-nIDU. These insights provide a deeper understanding of the IDU-mediated immunopathogenesis in HIV infection.
期刊介绍:
International Immunopharmacology is the primary vehicle for the publication of original research papers pertinent to the overlapping areas of immunology, pharmacology, cytokine biology, immunotherapy, immunopathology and immunotoxicology. Review articles that encompass these subjects are also welcome.
The subject material appropriate for submission includes:
• Clinical studies employing immunotherapy of any type including the use of: bacterial and chemical agents; thymic hormones, interferon, lymphokines, etc., in transplantation and diseases such as cancer, immunodeficiency, chronic infection and allergic, inflammatory or autoimmune disorders.
• Studies on the mechanisms of action of these agents for specific parameters of immune competence as well as the overall clinical state.
• Pre-clinical animal studies and in vitro studies on mechanisms of action with immunopotentiators, immunomodulators, immunoadjuvants and other pharmacological agents active on cells participating in immune or allergic responses.
• Pharmacological compounds, microbial products and toxicological agents that affect the lymphoid system, and their mechanisms of action.
• Agents that activate genes or modify transcription and translation within the immune response.
• Substances activated, generated, or released through immunologic or related pathways that are pharmacologically active.
• Production, function and regulation of cytokines and their receptors.
• Classical pharmacological studies on the effects of chemokines and bioactive factors released during immunological reactions.