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Yaseen MM, Abuharfeil NM, Darmani H. MDSC expansion during HIV infection: regulators, ART and immune reconstitution. Genes Immun 2024; 25:242-253. [PMID: 38605259 DOI: 10.1038/s41435-024-00272-9] [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: 11/14/2023] [Revised: 04/03/2024] [Accepted: 04/05/2024] [Indexed: 04/13/2024]
Abstract
Myeloid-derived suppressor cells (MDSCs) become expanded in different pathological conditions including human immunodeficiency virus (HIV) infection and this may worsen the disease status and accelerate disease progression. In HIV infection, MDSCs suppress anti-HIV immune responses and hamper immune reconstitution. Understanding the factors and mechanisms of MDSC expansion during HIV infection is central to understanding the pathophysiology of HIV infection. This may pave the way to developing new therapeutic targets or strategies. In this work we addressed (i) the mechanisms that regulate MDSC expansion, (ii) the impact of antiretroviral therapy (ART) on the frequency of MDSCs during HIV infection; (iii) the impact of MDSCs on immune reconstitution during successful ART; and (iv) the potential of MDSCs as a therapeutic target.
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Affiliation(s)
- Mahmoud Mohammad Yaseen
- Department of Biotechnology and Genetic Engineering, Faculty of Science and Arts, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110, Jordan.
| | - Nizar Mohammad Abuharfeil
- Department of Biotechnology and Genetic Engineering, Faculty of Science and Arts, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110, Jordan
| | - Homa Darmani
- Department of Biotechnology and Genetic Engineering, Faculty of Science and Arts, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110, Jordan
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2
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Matherne MG, Phillips ES, Embrey SJ, Burke CM, Machado HL. Emerging functions of C/EBPβ in breast cancer. Front Oncol 2023; 13:1111522. [PMID: 36761942 PMCID: PMC9905667 DOI: 10.3389/fonc.2023.1111522] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 01/05/2023] [Indexed: 01/26/2023] Open
Abstract
Breast tumorigenesis relies on complex interactions between tumor cells and their surrounding microenvironment, orchestrated by tightly regulated transcriptional networks. C/EBPβ is a key transcription factor that regulates the proliferation and differentiation of multiple cell types and modulates a variety of biological processes such as tissue homeostasis and the immune response. In addition, C/EBPβ has well-established roles in mammary gland development, is overexpressed in breast cancer, and has tumor-promoting functions. In this review, we discuss context-specific roles of C/EBPβ during breast tumorigenesis, isoform-specific gene regulation, and regulation of the tumor immune response. We present challenges in C/EBPβ biology and discuss the importance of C/EBPβ isoform-specific gene regulation in devising new therapeutic strategies.
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Affiliation(s)
- Megan G. Matherne
- Department of Biochemistry and Molecular Biology, Tulane School of Medicine, New Orleans, LA, United States
| | - Emily S. Phillips
- Department of Biochemistry and Molecular Biology, Tulane School of Medicine, New Orleans, LA, United States
| | - Samuel J. Embrey
- Department of Biochemistry and Molecular Biology, Tulane School of Medicine, New Orleans, LA, United States
| | - Caitlin M. Burke
- Department of Biochemistry and Molecular Biology, Tulane School of Medicine, New Orleans, LA, United States
| | - Heather L. Machado
- Department of Biochemistry and Molecular Biology, Tulane School of Medicine, New Orleans, LA, United States,Tulane Cancer Center, Louisiana Cancer Research Consortium, New Orleans, LA, United States,*Correspondence: Heather L. Machado,
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3
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Formosa A, Turgeon P, dos Santos CC. Role of miRNA dysregulation in sepsis. Mol Med 2022; 28:99. [PMID: 35986237 PMCID: PMC9389495 DOI: 10.1186/s10020-022-00527-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 08/05/2022] [Indexed: 11/18/2022] Open
Abstract
Background Sepsis is defined as a state of multisystem organ dysfunction secondary to a dysregulated host response to infection and causes millions of deaths worldwide annually. Novel ways to counteract this disease are needed and such tools may be heralded by a detailed understanding of its molecular pathogenesis. MiRNAs are small RNA molecules that target mRNAs to inhibit or degrade their translation and have important roles in several disease processes including sepsis. Main body The current review adopted a strategic approach to analyzing the widespread literature on the topic of miRNAs and sepsis. A pubmed search of “miRNA or microRNA or small RNA and sepsis not review” up to and including January 2021 led to 1140 manuscripts which were reviewed. Two hundred and thirty-three relevant papers were scrutinized for their content and important themes on the topic were identified and subsequently discussed, including an in-depth look at deregulated miRNAs in sepsis in peripheral blood, myeloid derived suppressor cells and extracellular vesicles. Conclusion Our analysis yielded important observations. Certain miRNAs, namely miR-150 and miR-146a, have consistent directional changes in peripheral blood of septic patients across numerous studies with strong data supporting a role in sepsis pathogenesis. Furthermore, a large body of literature show miRNA signatures of clinical relevance, and lastly, many miRNAs deregulated in sepsis are associated with the process of endothelial dysfunction. This review offers a widespread, up-to-date and detailed discussion of the role of miRNAs in sepsis and is meant to stimulate further work in the field due to the potential of these small miRNAs in prompt diagnostics, prognostication and therapeutic agency. Supplementary Information The online version contains supplementary material available at 10.1186/s10020-022-00527-z.
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4
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Zhang Z, Bossila EA, Li L, Hu S, Zhao Y. Central gene transcriptional regulatory networks shaping monocyte development in bone marrow. Front Immunol 2022; 13:1011279. [PMID: 36304450 PMCID: PMC9595600 DOI: 10.3389/fimmu.2022.1011279] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 09/26/2022] [Indexed: 11/13/2022] Open
Abstract
The development of monocytes in bone marrow is a complex process with multiple steps. We used RNA-seq data to analyze the transcriptome profiles in developing stages of monocytes, including hematopoietic stem cells (HSCs), common myeloid progenitors (CMPs), granulocyte-monocyte progenitors (GMPs), and monocytes. We found that genes related to potassium and other cation transmembrane activities and ion binding were upregulated during the differentiation of HSCs into CMPs. Protein transport and membrane surface functional molecules were significantly upregulated in the GMP stage. The CD42RAC and proteasome pathways are significantly upregulated during the development of HSCs into monocytes. Transcription factors Ank1, Runx2, Hmga2, Klf1, Nfia, and Bmyc were upregulated during the differentiation of HSCs into CMPs; Gfi1 and Hmgn2 were highly expressed during the differentiation of CMPs into GMPs; Seventeen transcription factors including Foxo1, Cdkn2d, Foxo3, Ep300, Pias1, Nfkb1, Creb1, Bcl6, Ppp3cb, Stat5b, Nfatc4, Mef2a, Stat6, Ifnar2, Irf7, Irf5, and Cebpb were identified as potentially involved in the development of GMPs into monocytes in mice and humans. In metabolism pathway regulation, HSCs have high glucose, lipid, and nucleic acid metabolism activities; CMPs mainly up regulate the TCA cycle related genes; and GMPs have extremely active metabolisms, with significantly elevated pentose phosphate pathway, TCA cycle, histidine metabolism, and purine metabolism. In the monocyte phase, the tricarboxylic acid (TCA) cycle is reduced, and the anaerobic glycolysis process becomes dominated. Overall, our studies offer the kinetics and maps of gene transcriptional expressions and cell metabolisms during monocyte development in bone marrow.
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Affiliation(s)
- Zhaoqi Zhang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Elhusseny A. Bossila
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
- Biotechnology Department, Faculty of Agriculture Al-Azhar University, Cairo, Egypt
| | - Ling Li
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Beijing Institute for Stem Cell and Regeneration, Beijing, China
| | - Songnian Hu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Yong Zhao
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
- Beijing Institute for Stem Cell and Regeneration, Beijing, China
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5
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Sehgal R, Kaur N, Ramakrishna G, Trehanpati N. Immune Surveillance by Myeloid-Derived Suppressor Cells in Liver Diseases. Dig Dis 2021; 40:301-312. [PMID: 34157708 DOI: 10.1159/000517459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 05/27/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND Myeloid-derived suppressor cells (MDSCs) are immunosuppressive in nature, originate in the bone marrow, and are mainly found in the blood, spleen, and liver. In fact, liver acts as an important organ for induction and accumulation of MDSCs, especially during infection, inflammation, and cancer. In humans and rodents, models of liver diseases revealed that MDSCs promote regeneration and drive the inflammatory processes, leading to hepatitis, fibrogenesis, and cirrhosis, ultimately resulting in hepatocellular carcinoma. SUMMARY This brief review is focused on the in-depth understanding of the key molecules involved in the expansion and regulation of MDSCs and their underlying immunosuppressive mechanisms in liver diseases. KEY MESSAGE Modulated MDSCs can be used for therapeutic purposes in inflammation, cancer, and sepsis.
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Affiliation(s)
- Rashi Sehgal
- Department of Molecular and Cellular Medicine, Institute of Liver and Biliary Sciences, New Delhi, India.,Amity Institute of Biotechnology (AIB), Amity University, Noida, India
| | - Navkiran Kaur
- Amity Institute of Biotechnology (AIB), Amity University, Noida, India
| | - Gayatri Ramakrishna
- Department of Molecular and Cellular Medicine, Institute of Liver and Biliary Sciences, New Delhi, India
| | - Nirupma Trehanpati
- Department of Molecular and Cellular Medicine, Institute of Liver and Biliary Sciences, New Delhi, India
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Zalfa C, Paust S. Natural Killer Cell Interactions With Myeloid Derived Suppressor Cells in the Tumor Microenvironment and Implications for Cancer Immunotherapy. Front Immunol 2021; 12:633205. [PMID: 34025641 PMCID: PMC8133367 DOI: 10.3389/fimmu.2021.633205] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 02/12/2021] [Indexed: 12/17/2022] Open
Abstract
The tumor microenvironment (TME) is a complex and heterogeneous environment composed of cancer cells, tumor stroma, a mixture of tissue-resident and infiltrating immune cells, secreted factors, and extracellular matrix proteins. Natural killer (NK) cells play a vital role in fighting tumors, but chronic stimulation and immunosuppression in the TME lead to NK cell exhaustion and limited antitumor functions. Myeloid-derived suppressor cells (MDSCs) are a heterogeneous group of myeloid cells with potent immunosuppressive activity that gradually accumulate in tumor tissues. MDSCs interact with innate and adaptive immune cells and play a crucial role in negatively regulating the immune response to tumors. This review discusses MDSC-mediated NK cell regulation within the TME, focusing on critical cellular and molecular interactions. We review current strategies that target MDSC-mediated immunosuppression to enhance NK cell cytotoxic antitumor activity. We also speculate on how NK cell-based antitumor immunotherapy could be improved.
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Affiliation(s)
| | - Silke Paust
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, United States
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Zhang W, Luo M, Zhou Y, Hu J, Li C, Liu K, Liu M, Zhu Y, Chen H, Zhang H. Liver X receptor agonist GW3965 protects against sepsis by promoting myeloid derived suppressor cells apoptosis in mice. Life Sci 2021; 276:119434. [PMID: 33785343 DOI: 10.1016/j.lfs.2021.119434] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/19/2021] [Accepted: 03/23/2021] [Indexed: 12/29/2022]
Abstract
AIMS Immunosuppressive myeloid-derived suppressor cells (MDSCs) continuously expand and lead to poor outcome during sepsis. The activation of liver X receptor (LXR) can mitigate sepsis-induced liver and myocardial damage. This study aims to determine whether LXR plays a protective role in sepsis by regulating MDSCs. MAIN METHODS Cecal ligation and puncture(CLP)was used to induce sepsis in mice. The mice were then treated with LXR agonist GW3965 (3 mg/kg) or vehicle 1 h, 6 h, 12 h, 24 h, 48 h, 72 h postoperatively. The effect of LXR on the survival rate and multi-organ injury induced by sepsis was evaluated by survival analysis, histological staining, biochemical analysis and ELISAs. The percentages of MDSCs and T cells were detected using flow cytometry. The mRNA expressions of LXR and ATP-binding cassette transporter A1 (ABCA1) were measured using real-time quantitative PCR (RT-qPCR). ABCA1 protein level was determined using immunofluorescence staining. KEY FINDINGS LXR agonist GW3965 treatment improved the survival of septic mice, accompanied by reduced multi-organ injury and a decreased level of inflammatory cytokines. Furthermore, GW3965 treatment decreased MDSCs abundance in spleen by boosting the apoptosis of spleen MDSCs, therefore ameliorating their immunosuppressive activity. Meanwhile, bacteria clearance in tissues was enhanced after the GW3965 administration in septic mice. Mechanistically, GW3965 activated LXRβ and its downstream target ABCA1 to initiate the apoptosis of spleen MDSCs. SIGNIFICANCE These findings provide new insights into the relationship between LXR and MDSCs in sepsis, thus revealing a potentially effective approach to target the immunosuppression of sepsis.
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Affiliation(s)
- Wenqin Zhang
- Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Hunan, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Hunan, China; Department of Pathology, Xiangya Changde Hospital, Changde, Hunan, China
| | - Minjie Luo
- Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Hunan, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Hunan, China
| | - Yuexue Zhou
- Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Hunan, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Hunan, China
| | - Jie Hu
- Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Hunan, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Hunan, China
| | - Caiyan Li
- Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Hunan, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Hunan, China
| | - Ke Liu
- Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Hunan, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Hunan, China
| | - Meidong Liu
- Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Hunan, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Hunan, China
| | - Yaxi Zhu
- Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Hunan, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Hunan, China
| | - Huan Chen
- Postdoctoral Research Station of Clinical Medicine and Department of Hematology, the Third Xiangya Hospital, Central South University, Changsha, Hunan Province, China.
| | - Huali Zhang
- Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Hunan, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Hunan, China.
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8
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Fultang N, Li X, Li T, Chen YH. Myeloid-Derived Suppressor Cell Differentiation in Cancer: Transcriptional Regulators and Enhanceosome-Mediated Mechanisms. Front Immunol 2021; 11:619253. [PMID: 33519825 PMCID: PMC7840597 DOI: 10.3389/fimmu.2020.619253] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 11/30/2020] [Indexed: 01/16/2023] Open
Abstract
Myeloid-derived Suppressor Cells (MDSCs) are a sub-population of leukocytes that are important for carcinogenesis and cancer immunotherapy. During carcinogenesis or severe infections, inflammatory mediators induce MDSCs via aberrant differentiation of myeloid precursors. Although several transcription factors, including C/EBPβ, STAT3, c-Rel, STAT5, and IRF8, have been reported to regulate MDSC differentiation, none of them are specifically expressed in MDSCs. How these lineage-non-specific transcription factors specify MDSC differentiation in a lineage-specific manner is unclear. The recent discovery of the c-Rel-C/EBPβ enhanceosome in MDSCs may help explain these context-dependent roles. In this review, we examine several transcriptional regulators of MDSC differentiation, and discuss the concept of non-modular regulation of MDSC signature gene expression by transcription factors such as c-Rel and C/EBPß.
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Affiliation(s)
- Norman Fultang
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | | | | | - Youhai H. Chen
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
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9
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Yaseen MM, Abuharfeil NM, Darmani H, Daoud A. Recent advances in myeloid-derived suppressor cell biology. Front Med 2020; 15:232-251. [PMID: 32876877 DOI: 10.1007/s11684-020-0797-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 04/17/2020] [Indexed: 12/17/2022]
Abstract
In recent years, studying the role of myeloid-derived suppressor cells (MDSCs) in many pathological inflammatory conditions has become a very active research area. Although the role of MDSCs in cancer is relatively well established, their role in non-cancerous pathological conditions remains in its infancy resulting in much confusion. Our objectives in this review are to address some recent advances in MDSC research in order to minimize such confusion and to provide an insight into their function in the context of other diseases. The following topics will be specifically focused upon: (1) definition and characterization of MDSCs; (2) whether all MDSC populations consist of immature cells; (3) technical issues in MDSC isolation, estimation and characterization; (4) the origin of MDSCs and their anatomical distribution in health and disease; (5) mediators of MDSC expansion and accumulation; (6) factors that determine the expansion of one MDSC population over the other; (7) the Yin and Yang roles of MDSCs. Moreover, the functions of MDSCs will be addressed throughout the text.
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Affiliation(s)
- Mahmoud Mohammad Yaseen
- Department of Biotechnology and Genetic Engineering, Jordan University of Science and Technology, Irbid, 22110, Jordan.
| | - Nizar Mohammad Abuharfeil
- Department of Biotechnology and Genetic Engineering, Jordan University of Science and Technology, Irbid, 22110, Jordan
| | - Homa Darmani
- Department of Applied Biology, Faculty of Science and Arts, Jordan University of Science and Technology, Irbid, 22110, Jordan
| | - Ammar Daoud
- Department of Internal Medicine, Faculty of Medicine, Jordan University of Science and Technology, Irbid, 22110, Jordan
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10
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Chen L, Hu L, Zhu X, Wang Y, Li Q, Ma J, Li H. MALAT1 overexpression attenuates AS by inhibiting ox-LDL-stimulated dendritic cell maturation via miR-155-5p/NFIA axis. Cell Cycle 2020; 19:2472-2485. [PMID: 32840181 DOI: 10.1080/15384101.2020.1807094] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
MALAT1 is associated with dendritic cells (DCs) maturation in Atherosclerosis (AS). This article aims to demystify the role of MALAT1 in AS. We separated immature DCs (iDCs) from healthy volunteers or ApoE-/- mice. And iDCs were treated with oxidized low density lipoprotein (ox-LDL) to induce DCs maturation. We found that ox-LDL promoted the levels of DCs maturation markers including CD83, CD86, IL-12 and IL-6. MALAT1 and NFIA were down-regulated, whereas miR-155-5p was up-regulated in the ox-LDL-treated iDCs. Furthermore, DCs maturation was notably suppressed by MALAT1 overexpression, NFIA overexpression or miR-155-5p knockdown. Moreover, MALAT1 functioned as a competing endogenous RNA to repress miR-155-5p, which controlled its down-stream target, NFIA. In addition, MALAT1 overexpression inhibited ox-LDL-stimulated DCs maturation by regulating miR-155-5p/NFIA axis. In AS mice, MALAT1 overexpression attenuated ox-LDL-stimulated DCs maturation and reduced atherosclerotic plaque area. In summary, our study demonstrates that MALAT1 overexpression attenuates AS by inhibiting ox-LDL-stimulated DCs maturation via miR-155-5p/NFIA axis. Thus, MALAT1/miR-155-5p/NFIA axis can potentially be used in the treatment of AS.
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Affiliation(s)
- Li Chen
- Department of Gerontology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China; Anhui Provincial Hospital, Anhui Medical University , Hefei Anhui, 230001, P.R.China
| | - Liqun Hu
- Department of Gerontology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China; Anhui Provincial Hospital, Anhui Medical University , Hefei Anhui, 230001, P.R.China
| | - Xiang Zhu
- Department of Gerontology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China; Anhui Provincial Hospital, Anhui Medical University , Hefei Anhui, 230001, P.R.China
| | - Yan Wang
- Department of Gerontology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China; Anhui Provincial Hospital, Anhui Medical University , Hefei Anhui, 230001, P.R.China
| | - Qing Li
- The Central Laboratory of Medical Research Center, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China; Anhui Provincial Hospital, Anhui Medical University , Hefei Anhui, 230001, P.R.China
| | - Jian Ma
- Department of Cardiology, Department of Cardiology, Shanghai Sixth People's Hospital, Shanghai Jiaotong University , Shanghai, China
| | - Hongqi Li
- Department of Gerontology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China; Anhui Provincial Hospital, Anhui Medical University , Hefei Anhui, 230001, P.R.China
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11
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Understanding the Differentiation, Expansion, Recruitment and Suppressive Activities of Myeloid-Derived Suppressor Cells in Cancers. Int J Mol Sci 2020; 21:ijms21103599. [PMID: 32443699 PMCID: PMC7279333 DOI: 10.3390/ijms21103599] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 02/28/2020] [Accepted: 03/13/2020] [Indexed: 12/15/2022] Open
Abstract
There has been a great interest in myeloid-derived suppressor cells (MDSCs) due to their biological functions in tumor-mediated immune escape by suppressing antitumor immune responses. These cells arise from altered myelopoiesis in response to the tumor-derived factors. The most recognized function of MDSCs is suppressing anti-tumor immune responses by impairing T cell functions, and these cells are the most important players in cancer dissemination and metastasis. Therefore, understanding the factors and the mechanism of MDSC differentiation, expansion, and recruitment into the tumor microenvironment can lead to its control. However, most of the studies only defined MDSCs with no further characterization of granulocytic and monocytic subsets. In this review, we discuss the mechanisms by which specific MDSC subsets contribute to cancers. A better understanding of MDSC subset development and the specific molecular mechanism is needed to identify treatment targets. The understanding of the specific molecular mechanisms responsible for MDSC accumulation would enable more precise therapeutic targeting of these cells.
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12
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Tong DL, Kempsell KE, Szakmany T, Ball G. Development of a Bioinformatics Framework for Identification and Validation of Genomic Biomarkers and Key Immunopathology Processes and Controllers in Infectious and Non-infectious Severe Inflammatory Response Syndrome. Front Immunol 2020; 11:380. [PMID: 32318053 PMCID: PMC7147506 DOI: 10.3389/fimmu.2020.00380] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 02/17/2020] [Indexed: 12/12/2022] Open
Abstract
Sepsis is defined as dysregulated host response caused by systemic infection, leading to organ failure. It is a life-threatening condition, often requiring admission to an intensive care unit (ICU). The causative agents and processes involved are multifactorial but are characterized by an overarching inflammatory response, sharing elements in common with severe inflammatory response syndrome (SIRS) of non-infectious origin. Sepsis presents with a range of pathophysiological and genetic features which make clinical differentiation from SIRS very challenging. This may reflect a poor understanding of the key gene inter-activities and/or pathway associations underlying these disease processes. Improved understanding is critical for early differential recognition of sepsis and SIRS and to improve patient management and clinical outcomes. Judicious selection of gene biomarkers suitable for development of diagnostic tests/testing could make differentiation of sepsis and SIRS feasible. Here we describe a methodologic framework for the identification and validation of biomarkers in SIRS, sepsis and septic shock patients, using a 2-tier gene screening, artificial neural network (ANN) data mining technique, using previously published gene expression datasets. Eight key hub markers have been identified which may delineate distinct, core disease processes and which show potential for informing underlying immunological and pathological processes and thus patient stratification and treatment. These do not show sufficient fold change differences between the different disease states to be useful as primary diagnostic biomarkers, but are instrumental in identifying candidate pathways and other associated biomarkers for further exploration.
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Affiliation(s)
- Dong Ling Tong
- Artificial Intelligence Laboratory, Faculty of Engineering and Computing, First City University College, Petaling Jaya, Malaysia.,School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Karen E Kempsell
- Public Health England, National Infection Service, Porton Down, Salisbury, United Kingdom
| | - Tamas Szakmany
- Department of Anaesthesia Intensive Care and Pain Medicine, Division of Population Medicine, Cardiff University, Cardiff, United Kingdom
| | - Graham Ball
- School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
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13
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Wang W, Xia X, Mao L, Wang S. The CCAAT/Enhancer-Binding Protein Family: Its Roles in MDSC Expansion and Function. Front Immunol 2019; 10:1804. [PMID: 31417568 PMCID: PMC6684943 DOI: 10.3389/fimmu.2019.01804] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 07/17/2019] [Indexed: 12/20/2022] Open
Abstract
Immunosuppressive cells have been highlighted in research due to their roles in tumor progression and treatment failure. Myeloid-derived suppressor cells (MDSCs) are among the major immunosuppressive cell populations in the tumor microenvironment, and transcription factors (TFs) are likely involved in MDSC expansion and activation. As key regulatory TFs, members of the CCAAT/enhancer-binding protein (C/EBP) family possibly modulate many biological processes, including cell growth, differentiation, metabolism, and death. Current evidence suggests that C/EBPs maintain critical regulation of MDSCs and are involved in the differentiation and function of MDSCs within the tumor microenvironment. To better understand the MDSC-associated transcriptional network and identify new therapy targets, we herein review recent findings about the C/EBP family regarding their participation in the expansion and function of MDSCs.
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Affiliation(s)
- Wenxin Wang
- Department of Laboratory Medicine, The Affiliated People's Hospital, Jiangsu University, Zhenjiang, China
- Jiangsu Key Laboratory of Laboratory Medicine, Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Xueli Xia
- Department of Laboratory Medicine, The Affiliated People's Hospital, Jiangsu University, Zhenjiang, China
- Jiangsu Key Laboratory of Laboratory Medicine, Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Lingxiang Mao
- Jiangsu Key Laboratory of Laboratory Medicine, Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Shengjun Wang
- Department of Laboratory Medicine, The Affiliated People's Hospital, Jiangsu University, Zhenjiang, China
- Jiangsu Key Laboratory of Laboratory Medicine, Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, China
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Ligation of CD180 contributes to endotoxic shock by regulating the accumulation and immunosuppressive activity of myeloid-derived suppressor cells through STAT3. Biochim Biophys Acta Mol Basis Dis 2019; 1865:535-546. [DOI: 10.1016/j.bbadis.2018.12.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 11/06/2018] [Accepted: 12/11/2018] [Indexed: 12/22/2022]
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Schrijver IT, Théroude C, Roger T. Myeloid-Derived Suppressor Cells in Sepsis. Front Immunol 2019; 10:327. [PMID: 30873175 PMCID: PMC6400980 DOI: 10.3389/fimmu.2019.00327] [Citation(s) in RCA: 143] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 02/08/2019] [Indexed: 12/16/2022] Open
Abstract
Myeloid-derived suppressor cells (MDSCs) are immature myeloid cells characterized by their immunosuppressive functions. MDSCs expand during chronic and acute inflammatory conditions, the best described being cancer. Recent studies uncovered an important role of MDSCs in the pathogenesis of infectious diseases along with sepsis. Here we discuss the mechanisms underlying the expansion and immunosuppressive functions of MDSCs, and the results of preclinical and clinical studies linking MDSCs to sepsis pathogenesis. Strikingly, all clinical studies to date suggest that high proportions of blood MDSCs are associated with clinical worsening, the incidence of nosocomial infections and/or mortality. Hence, MDSCs are attractive biomarkers and therapeutic targets for sepsis, especially because these cells are barely detectable in healthy subjects. Blocking MDSC-mediated immunosuppression and trafficking or depleting MDSCs might all improve sepsis outcome. While some key aspects of MDSCs biology need in depth investigations, exploring these avenues may participate to pave the way toward the implementation of personalized medicine and precision immunotherapy for patients suffering from sepsis.
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Affiliation(s)
- Irene T Schrijver
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, Epalinges, Switzerland
| | - Charlotte Théroude
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, Epalinges, Switzerland
| | - Thierry Roger
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, Epalinges, Switzerland
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