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Yan C, Chen J, Wang B, Wang J, Luo M, Tong J, Xu X, Zhang Q, Wang X. PD-L1 Expression Is Increased in LPS-Induced Acute Respiratory Distress Syndrome by PI3K-AKT-Egr-1/C/EBPδ Signaling Pathway. Inflammation 2024:10.1007/s10753-024-01988-6. [PMID: 38376609 DOI: 10.1007/s10753-024-01988-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 01/19/2024] [Accepted: 02/08/2024] [Indexed: 02/21/2024]
Abstract
The role of programmed death ligand 1 (PD-L1) has been extensively investigated in adaptive immune system. However, increasing data show that innate immune responses are also affected by the immune checkpoint molecule. It has been demonstrated that regulation of PD-L1 signaling in macrophages may be a potential therapeutic method for acute respiratory distress syndrome (ARDS). However, the PD-L1 expression pattern in local macrophages and whole lung tissues remains mysterious, hindering optimization of the potential treatment program. Therefore, we aim to determine the PD-L1 expression pattern during ARDS. Our findings show that PD-L1 levels are markedly increased in lipopolysaccharide (LPS)-stimulated lung tissues, which might be attributable to an increase in the gene expression by immune cells, including macrophages and neutrophils. In vitro experiments are performed to explore the mechanism involved in LPS-induced PD-L1 production. We find that PD-L1 generation is controlled by transcription factors early growth response 1 (Egr-1) and CCAAT/enhancer binding protein delta (C/EBPδ). Strikingly, PD-L1 production is enhanced by phosphoinositide-3 kinase (PI3K)-protein kinase B (AKT) signaling pathway via up-regulation of Egr-1 and C/EBPδ expressions. Additionally, we observe that expressions of Egr-1 and C/EBPδ mutually reinforce each other. Moreover, we observe that PD-L1 is protective for ARDS due to its regulatory role in macrophage-associated inflammatory response. In summary, during LPS-induced ARDS, PD-L1 expression, which is beneficial for the disease, is increased via the PI3K-AKT1-Egr-1/C/EBPδ signaling pathway, providing theoretical basis for application of methods controlling PD-L1 signaling in macrophages for ARDS treatment in clinic.
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Affiliation(s)
- Chunguang Yan
- Department of Pathogenic Biology and Immunology, Medical School of Southeast University, Nanjing, 210009, China.
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Zhongda Hospital of Southeast University, Nanjing, 210009, China.
- Tianjin Key Laboratory of Acute Abdomen Disease Associated Organ Injury and ITCWM Repair, Institute of Integrative Medicine for Acute Abdominal Diseases, Integrated Chinese and Western Medicine Hospital, Tianjin University, Tianjin, 300100, China.
| | - Jing Chen
- Department of Pathogenic Biology and Immunology, Medical School of Southeast University, Nanjing, 210009, China
| | - Botao Wang
- Tianjin Key Laboratory of Acute Abdomen Disease Associated Organ Injury and ITCWM Repair, Institute of Integrative Medicine for Acute Abdominal Diseases, Integrated Chinese and Western Medicine Hospital, Tianjin University, Tianjin, 300100, China
| | - Jingya Wang
- Department of Pathogenic Biology and Immunology, Medical School of Southeast University, Nanjing, 210009, China
| | - Ming Luo
- Department of Pathogenic Biology and Immunology, Medical School of Southeast University, Nanjing, 210009, China
| | - Jingru Tong
- Department of Pathogenic Biology and Immunology, Medical School of Southeast University, Nanjing, 210009, China
| | - Xuanli Xu
- Department of Respiratory, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China
| | - Qi Zhang
- Tianjin Key Laboratory of Acute Abdomen Disease Associated Organ Injury and ITCWM Repair, Institute of Integrative Medicine for Acute Abdominal Diseases, Integrated Chinese and Western Medicine Hospital, Tianjin University, Tianjin, 300100, China.
| | - Ximo Wang
- Tianjin Key Laboratory of Acute Abdomen Disease Associated Organ Injury and ITCWM Repair, Institute of Integrative Medicine for Acute Abdominal Diseases, Integrated Chinese and Western Medicine Hospital, Tianjin University, Tianjin, 300100, China.
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2
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Abou Harb M, Meckes DG, Sun L. Epstein-Barr virus LMP1 enhances levels of large extracellular vesicle-associated PD-L1. J Virol 2023; 97:e0021923. [PMID: 37702487 PMCID: PMC10617501 DOI: 10.1128/jvi.00219-23] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 06/13/2023] [Indexed: 09/14/2023] Open
Abstract
IMPORTANCE A growing body of evidence has supported the notion that viruses utilize EVs and associated pathways to incorporate viral products. This allows for the evasion of an immune response while enabling viral spread within the host. Given that viral proteins often elicit strong antigenic peptides that are recognized by T cells, the regulation of the PD-L1 pathway through the overexpression of lEV-associated PD-L1 may serve as a strategy for immune evasion by viruses. The discovery that EBV LMP1 increases the secretion of PD-L1 in larger EVs identifies a new potential target for immune blockade therapy in EBV-associated cancers. Our findings may help to clarify the mechanism of LMP1-mediated enhancement of PD-L1 packaging into lEVs and may lead to the identification of more specific targets for treatment. Additionally, the identification of lEV biomarkers that predict a viral origin of disease could allow for more targeted therapies to be developed.
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Affiliation(s)
- Monica Abou Harb
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, Florida, USA
| | - David G. Meckes
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, Florida, USA
| | - Li Sun
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, Florida, USA
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3
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Li S, Hao L, Zhang J, Deng J, Hu X. Focus on T cell exhaustion: new advances in traditional Chinese medicine in infection and cancer. Chin Med 2023; 18:76. [PMID: 37355637 DOI: 10.1186/s13020-023-00785-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 06/16/2023] [Indexed: 06/26/2023] Open
Abstract
In chronic infections and cancers, T lymphocytes (T cells) are exposed to persistent antigen or inflammatory signals. The condition is often associated with a decline in T-cell function: a state called "exhaustion". T cell exhaustion is a state of T cell dysfunction characterized by increased expression of a series of inhibitory receptors (IRs), decreased effector function, and decreased cytokine secretion, accompanied by transcriptional and epigenetic changes and metabolic defects. The rise of immunotherapy, particularly the use of immune checkpoint inhibitors (ICIs), has dramatically changed the clinical treatment paradigm for patients. However, its low response rate, single target and high immunotoxicity limit its clinical application. The multiple immunomodulatory potential of traditional Chinese medicine (TCM) provides a new direction for improving the treatment of T cell exhaustion. Here, we review recent advances that have provided a clearer molecular understanding of T cell exhaustion, revealing the characteristics and causes of T cell exhaustion in persistent infections and cancers. In addition, this paper summarizes recent advances in improving T cell exhaustion in infectious diseases and cancer with the aim of providing a comprehensive and valuable source of information on TCM as an experimental study and their role in collaboration with ICIs therapy.
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Affiliation(s)
- Shenghao Li
- Hospital of Chengdu University of Traditional Chinese Medicine, No. 39 Shi-Er-Qiao Road, Chengdu, 610072, Sichuan Province, People's Republic of China
- Chengdu University of Traditional Chinese Medicine, No. 37 Shi-Er-Qiao Road, Chengdu, 610075, Sichuan Province, People's Republic of China
| | - Liyuan Hao
- Hospital of Chengdu University of Traditional Chinese Medicine, No. 39 Shi-Er-Qiao Road, Chengdu, 610072, Sichuan Province, People's Republic of China
- Chengdu University of Traditional Chinese Medicine, No. 37 Shi-Er-Qiao Road, Chengdu, 610075, Sichuan Province, People's Republic of China
| | - Junli Zhang
- Hospital of Chengdu University of Traditional Chinese Medicine, No. 39 Shi-Er-Qiao Road, Chengdu, 610072, Sichuan Province, People's Republic of China
- Chengdu University of Traditional Chinese Medicine, No. 37 Shi-Er-Qiao Road, Chengdu, 610075, Sichuan Province, People's Republic of China
| | - Jiali Deng
- Hospital of Chengdu University of Traditional Chinese Medicine, No. 39 Shi-Er-Qiao Road, Chengdu, 610072, Sichuan Province, People's Republic of China
- Chengdu University of Traditional Chinese Medicine, No. 37 Shi-Er-Qiao Road, Chengdu, 610075, Sichuan Province, People's Republic of China
| | - Xiaoyu Hu
- Hospital of Chengdu University of Traditional Chinese Medicine, No. 39 Shi-Er-Qiao Road, Chengdu, 610072, Sichuan Province, People's Republic of China.
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Shen DD, Bi YP, Pang JR, Zhao LJ, Zhao LF, Gao Y, Wang B, Liu HM, Liu Y, Wang N, Zheng YC, Liu HM. Generation, secretion and degradation of cancer immunotherapy target PD-L1. Cell Mol Life Sci 2022; 79:413. [PMID: 35819633 PMCID: PMC11073444 DOI: 10.1007/s00018-022-04431-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 06/06/2022] [Accepted: 06/14/2022] [Indexed: 02/06/2023]
Abstract
Cancer immunotherapy is a rapidly developing and effective method for the treatment of a variety of malignancies in recent years. As a significant immune checkpoint, programmed cell death 1 ligand 1 (PD-L1) and its receptor programmed cell death protein 1 (PD-1) play the most significant role in cancer immune escape and cancer immunotherapy. Though PD-L1 have become an important target for drug development and there have been various approved drugs and clinic trials targeting it, and various clinical response rate and adverse reactions prevent many patients from benefiting from it. In recent years, combination trials have become the main direction of PD-1/PD-L1 antibodies development. Here, we summarized PD-L1 biofunctions and key roles in various cancers along with the development of PD-L1 inhibitors. The regulators that are involved in controlling PD-L1 expression including post-translational modification, mRNA level regulation as well as degradation and exosome secretory pathway of PD-L1 were focused. This systematic summary may provide comprehensive understanding of different regulations on PD-L1 as well as a broad prospect for the search of the important regulator of PD-L1. The regulatory factors of PD-L1 can be potential targets for immunotherapy and increase strategies of immunotherapy in combination.
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Affiliation(s)
- Dan-Dan Shen
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou Key Laboratory of Endometrial Disease Prevention and Treatment Zhengzhou China, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China; Key Laboratory of Henan Province for Drug Quality and Evaluation; Institute of Drug Discovery and Development; School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China
| | - Ya-Ping Bi
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China; Key Laboratory of Henan Province for Drug Quality and Evaluation; Institute of Drug Discovery and Development; School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China
| | - Jing-Ru Pang
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China; Key Laboratory of Henan Province for Drug Quality and Evaluation; Institute of Drug Discovery and Development; School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China
| | - Li-Juan Zhao
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China; Key Laboratory of Henan Province for Drug Quality and Evaluation; Institute of Drug Discovery and Development; School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China
- State Key Laboratory of Esophageal Cancer Prevention & Treatment; Academy of Medical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China
| | - Long-Fei Zhao
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China; Key Laboratory of Henan Province for Drug Quality and Evaluation; Institute of Drug Discovery and Development; School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China
| | - Ya Gao
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China; Key Laboratory of Henan Province for Drug Quality and Evaluation; Institute of Drug Discovery and Development; School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China
| | - Bo Wang
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China; Key Laboratory of Henan Province for Drug Quality and Evaluation; Institute of Drug Discovery and Development; School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China
| | - Hui-Min Liu
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China; Key Laboratory of Henan Province for Drug Quality and Evaluation; Institute of Drug Discovery and Development; School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China
| | - Ying Liu
- The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Ning Wang
- The School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Yi-Chao Zheng
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou Key Laboratory of Endometrial Disease Prevention and Treatment Zhengzhou China, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China.
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China; Key Laboratory of Henan Province for Drug Quality and Evaluation; Institute of Drug Discovery and Development; School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China.
- State Key Laboratory of Esophageal Cancer Prevention & Treatment; Academy of Medical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China.
| | - Hong-Min Liu
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China; Key Laboratory of Henan Province for Drug Quality and Evaluation; Institute of Drug Discovery and Development; School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China.
- State Key Laboratory of Esophageal Cancer Prevention & Treatment; Academy of Medical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450052, Henan, China.
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5
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Wang F, Wu L, Yin L, Shi H, Gu Y, Xing N. Combined treatment with anti-PSMA CAR NK-92 cell and anti-PD-L1 monoclonal antibody enhances the antitumour efficacy against castration-resistant prostate cancer. Clin Transl Med 2022; 12:e901. [PMID: 35696531 PMCID: PMC9191826 DOI: 10.1002/ctm2.901] [Citation(s) in RCA: 18] [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: 01/25/2022] [Revised: 04/19/2022] [Accepted: 05/11/2022] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND The chimeric antigen receptor NK-92 (CAR NK-92) cell targeting the prostate-specific membrane antigen (PSMA) has shown antitumour effects in castration-resistant prostate cancer (CRPC). However, the expression changes of programmed death ligand 1 (PD-L1) and its mechanisms on CAR NK-92 and CRPC cells and the effect of the anti-PD-L1 monoclonal antibody (mAb) on PD-L1 expressed on CAR NK-92 cells remain unknown. METHODS Human dendritic cells and CD8+ T cells were acquired from blood samples of healthy donors and cocultured with C4-2 cells. Changes in PD-L1 expression were detected by flow cytometry. Differential gene expressions were investigated by RNA sequence analysis, while the regulation of PD-L1 molecular signaling was explored using western blotting. In vitro cytotoxicity was evaluated using the Cell Counting Kit-8 assay and the bioluminescent intensity (BLI) of green fluorescent protein-labelled C4-2 cells. CRPC growth in vivo was monitored using callipers and BLI in male NOD/SCID mice subcutaneously injected with C4-2 cells and treated intravenously with anti-PD-L1/PD-1 mAb, CAR NK-92 or cocultured CD8+ T cells. RESULTS Significantly upregulated expression of PD-L1k was observed in cocultured C4-2 and CAR NK-92 cells. In addition, upregulation of PD-L1 expression was dependent on interferon-γ in C4-2 cells, while it was dependent on direct cell-to-cell interaction via the NK group 2 member D/ phosphatidylinositol 3-kinase/AKT pathway in CAR NK-92 cells. The anti-PD-L1 mAb directly acted on PD-L1 expressed on CAR NK-92 cells and augmented the cytotoxicity of CAR NK-92 cells against C4-2 and CRPC cells from one patient in vitro. Anti-PD-L1 mAb significantly enhanced the antitumour effect of CAR NK-92 cells against CRPC cells in vivo when compared to treatment with CAR NK-92 cells or combined with anti-PD-1 mAb in the absence or presence of cocultured CD8+ T cells. CONCLUSION Combined treatment with CAR NK-92 and anti-PD-L1 mAb improved the antitumour efficacy against CRPC, which is of extraordinary translational value in the clinical treatment of CRPC.
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MESH Headings
- Animals
- Antibodies, Monoclonal/metabolism
- Antibodies, Monoclonal/pharmacology
- Antibodies, Monoclonal/therapeutic use
- B7-H1 Antigen/genetics
- B7-H1 Antigen/metabolism
- B7-H1 Antigen/therapeutic use
- CD8-Positive T-Lymphocytes/metabolism
- Cell Line, Tumor
- Humans
- Killer Cells, Natural/metabolism
- Male
- Mice
- Mice, Inbred NOD
- Mice, SCID
- Prostatic Neoplasms, Castration-Resistant/drug therapy
- Receptors, Chimeric Antigen/metabolism
- Receptors, Chimeric Antigen/therapeutic use
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Affiliation(s)
- Fangming Wang
- State Key Laboratory of Molecular OncologyNational Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
- Department of UrologyNational Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
| | - Liyuan Wu
- State Key Laboratory of Molecular OncologyNational Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
- Department of UrologyNational Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
| | - Le Yin
- R&D departmentAllife Medicine INCBeijingChina
| | - Hui Shi
- R&D departmentAllife Medicine INCBeijingChina
- Molecular Pharmacology LaboratoryInstitute of Molecular MedicinePeking UniversityBeijingChina
| | - Yuchun Gu
- R&D departmentAllife Medicine INCBeijingChina
- Molecular Pharmacology LaboratoryInstitute of Molecular MedicinePeking UniversityBeijingChina
- Translation Medicine Research Group (TMRG)Aston Medical SchoolAston UniversityBirminghamUK
| | - Nianzeng Xing
- State Key Laboratory of Molecular OncologyNational Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
- Department of UrologyNational Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
- Department of UrologyShanxi Province Cancer Hospital/Shanxi Hospital Affiliated to Cancer HospitalChinese Academy of Medical Sciences/Cancer Hospital Affiliated to Shanxi Medical UniversityTaiyuanChina
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6
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Wang M, Bai Y, Pei J, Li D, Pu X, Zhu W, Xia L, Qi C, Jiang H, Ning Y. β-Glucan Combined With PD-1/PD-L1 Checkpoint Blockade for Immunotherapy in Patients With Advanced Cancer. Front Pharmacol 2022; 13:887457. [PMID: 35548349 PMCID: PMC9084312 DOI: 10.3389/fphar.2022.887457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 04/06/2022] [Indexed: 12/18/2022] Open
Abstract
Programmed death-1 (PD-1)/PD-ligand 1 (PD-L1) checkpoint blocking antibodies have been shown to be a powerful immune checkpoint blockade (ICB) therapy for patients with cancer. However, patients quickly develop resistance to immunotherapy. β-glucan, an immune adjuvant, has been found to stimulate innate and adaptive immune responses. In this study, we assessed the use of whole glucan particle (WGP) β-glucan in combination with PD-1/PD-L1–blocking antibodies to slow down the resistance to immunotherapy. Results from a tumor mouse model demonstrated that administration of WGP β-glucan plus PD-1/PD-L1–blocking antibodies led to increased recruitment of immune-associated cells, improved regulation of the balance between T-cell activation and immune tolerance, and delayed tumor progression. This combination therapy was also found to improve progression-free survival in patients with advanced cancer who had previously discontinued anti-PD-1/PD-L1 because of disease progression. These findings suggest that β-glucan could be used as an immune adjuvant to reverse anti-PD-1/PD-L1 resistance by regulating the immune system.
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Affiliation(s)
- Mengjie Wang
- Department of Oncology, The Affiliated Hospital of Nanjing Medical University, Changzhou No. 2 People’s Hospital, Changzhou, China
| | - Yu Bai
- Medical Research Center, The Affiliated Hospital of Nanjing Medical University, Changzhou No. 2 People’s Hospital, Changzhou, China
| | - Jiaxin Pei
- Department of Oncology, Graduate School of Dalian Medical University, Dalian, China
| | - Dongqing Li
- Department of Oncology, The Affiliated Hospital of Nanjing Medical University, Changzhou No. 2 People’s Hospital, Changzhou, China
| | - Xiaolin Pu
- Department of Oncology, The Affiliated Hospital of Nanjing Medical University, Changzhou No. 2 People’s Hospital, Changzhou, China
| | - Wenyu Zhu
- Department of Oncology, The Affiliated Hospital of Nanjing Medical University, Changzhou No. 2 People’s Hospital, Changzhou, China
| | - Lei Xia
- Department of Oncology, The Affiliated Hospital of Nanjing Medical University, Changzhou No. 2 People’s Hospital, Changzhou, China
| | - Chunjian Qi
- Medical Research Center, The Affiliated Hospital of Nanjing Medical University, Changzhou No. 2 People’s Hospital, Changzhou, China
| | - Hua Jiang
- Department of Oncology, The Affiliated Hospital of Nanjing Medical University, Changzhou No. 2 People’s Hospital, Changzhou, China
- *Correspondence: Hua Jiang, ; Yongling Ning,
| | - Yongling Ning
- Medical Research Center, The Affiliated Hospital of Nanjing Medical University, Changzhou No. 2 People’s Hospital, Changzhou, China
- *Correspondence: Hua Jiang, ; Yongling Ning,
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7
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Pasquereau S, Herbein G. CounterAKTing HIV: Toward a “Block and Clear” Strategy? Front Cell Infect Microbiol 2022; 12:827717. [PMID: 35186800 PMCID: PMC8856111 DOI: 10.3389/fcimb.2022.827717] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 01/18/2022] [Indexed: 11/20/2022] Open
Abstract
The protein kinase B or Akt is a central regulator of survival, metabolism, growth and proliferation of the cells and is known to be targeted by various viral pathogens, including HIV-1. The central role of Akt makes it a critical player in HIV-1 pathogenesis, notably by affecting viral entry, latency and reactivation, cell survival, viral spread and immune response to the infection. Several HIV proteins activate the PI3K/Akt pathway, to fuel the progression of the infection. Targeting Akt could help control HIV-1 entry, viral latency/replication, cell survival of infected cells, HIV spread from cell-to-cell, and the immune microenvironment which could ultimately allow to curtail the size of the HIV reservoir. Beside the “shock and kill” and “block and lock” strategies, the use of Akt inhibitors in combination with latency inducing agents, could favor the clearance of infected cells and be part of new therapeutic strategies with the goal to “block and clear” HIV.
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Affiliation(s)
- Sébastien Pasquereau
- Laboratory Pathogens & Inflammation-Epigenetics of Viral Infections and Inflammatory Diseases Laboratory (EPILAB), University of Franche-Comté, Bourgogne Franche-Comté University Bourgogne Franche-Comté (UBFC), Besançon, France
| | - Georges Herbein
- Laboratory Pathogens & Inflammation-Epigenetics of Viral Infections and Inflammatory Diseases Laboratory (EPILAB), University of Franche-Comté, Bourgogne Franche-Comté University Bourgogne Franche-Comté (UBFC), Besançon, France
- Laboratory of Virology, Centre Hospitalier Universitaire (CHU) Besançon University Hospital, Besançon, France
- *Correspondence: Georges Herbein,
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8
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Liu Y, Wu C, Chen N, Li Y, Fan C, Zhao S, Bai T, Zhao Z, Chen J, Su S, Zhang Z, Zhou Y, Zhu Z. PD-1 Blockade Restores the Proliferation of Peripheral Blood Lymphocyte and Inhibits Lymphocyte Apoptosis in a BALB/c Mouse Model of CP BVDV Acute Infection. Front Immunol 2021; 12:727254. [PMID: 34552590 PMCID: PMC8450576 DOI: 10.3389/fimmu.2021.727254] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 08/19/2021] [Indexed: 01/08/2023] Open
Abstract
Acute infection of bovine viral diarrhea virus (BVDV) is associated with immune dysfunction and can cause peripheral blood lymphopenia and lymphocyte apoptosis. Our previous study has confirmed that programmed death-1 (PD-1) blockade inhibits peripheral blood lymphocytes (PBL) apoptosis and restores proliferation and anti-viral immune functions of lymphocytes after BVDV infection in vitro. However, the situation in vivo remains to be further studied and confirmed. Therefore, in this study, we established a BALB/c mouse model of acute BVDV infection with cytopathic (CP) BVDV (strain NADL) and non-cytopathic (NCP) BVDV (strain NY-1). Then, we examined the mRNA and protein levels of PD-1 and programmed death-ligand 1 (PD-L1) in peripheral blood mononuclear cells (PBMC) from BVDV-infected mice and analyzed the effects of PD-1 blockade on the proportions of CD3+, CD4+, and CD8+ T cell subsets, the apoptosis and proliferation of PBL, and the production of IL-2 and IFN-γ. We found that leukopenia, lymphocytopenia, and thrombocytopenia were developed in both CP and NCP BVDV-infected mice at day 7 of post-infection. The mRNA and protein expression of PD-1 and PD-L1 were significantly upregulated in CP and NCP BVDV-infected mice. Moreover, PD-1/PD-L1 upregulation was accompanied by leukopenia and lymphopenia. Additionally, PD-1 blockade inhibited PBL apoptosis and virus replication, restored the proportions of CD3+, CD4+, and CD8+ T cell subsets, and increased IFN-γ production and p-ERK expression in BVDV-infected mice. However, blocking PD-1 did not significantly affect PBL proliferation and IL-2 production in NCP BVDV-infected mice. Our findings further confirmed the immunomodulatory role of PD-1 in peripheral blood lymphocytopenia in vivo and provided a scientific basis for exploring the molecular mechanism of immune dysfunction caused by acute BVDV infection.
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Affiliation(s)
- Yu Liu
- College of Animal Science and Veterinary Medicine, HeiLongJiang BaYi Agricultural University, Daqing, China
- Heilongjiang Provincial Engineering Research Center for Prevention and Control of Cattle Diseases, HeiLongJiang BaYi Agricultural University, Daqing, China
- Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, HeiLongJiang BaYi Agricultural University, Daqing, China
| | - Chenhua Wu
- College of Animal Science and Veterinary Medicine, HeiLongJiang BaYi Agricultural University, Daqing, China
| | - Nannan Chen
- College of Animal Science and Veterinary Medicine, HeiLongJiang BaYi Agricultural University, Daqing, China
| | - Yang Li
- Heilongjiang Provincial Engineering Research Center for Prevention and Control of Cattle Diseases, HeiLongJiang BaYi Agricultural University, Daqing, China
- College of Engineering, HeiLongJiang BaYi Agricultural University, Daqing, China
| | - Chunling Fan
- College of Animal Science and Veterinary Medicine, HeiLongJiang BaYi Agricultural University, Daqing, China
| | - Shangqi Zhao
- College of Animal Science and Veterinary Medicine, HeiLongJiang BaYi Agricultural University, Daqing, China
| | - Tongtong Bai
- College of Animal Science and Veterinary Medicine, HeiLongJiang BaYi Agricultural University, Daqing, China
| | - Zhibo Zhao
- College of Animal Science and Veterinary Medicine, HeiLongJiang BaYi Agricultural University, Daqing, China
| | - Jinwei Chen
- College of Animal Science and Veterinary Medicine, HeiLongJiang BaYi Agricultural University, Daqing, China
| | - Siyu Su
- College of Animal Science and Veterinary Medicine, HeiLongJiang BaYi Agricultural University, Daqing, China
| | - Zecai Zhang
- College of Animal Science and Veterinary Medicine, HeiLongJiang BaYi Agricultural University, Daqing, China
- Heilongjiang Provincial Engineering Research Center for Prevention and Control of Cattle Diseases, HeiLongJiang BaYi Agricultural University, Daqing, China
| | - Yulong Zhou
- College of Animal Science and Veterinary Medicine, HeiLongJiang BaYi Agricultural University, Daqing, China
- Heilongjiang Provincial Engineering Research Center for Prevention and Control of Cattle Diseases, HeiLongJiang BaYi Agricultural University, Daqing, China
| | - Zhanbo Zhu
- College of Animal Science and Veterinary Medicine, HeiLongJiang BaYi Agricultural University, Daqing, China
- Heilongjiang Provincial Engineering Research Center for Prevention and Control of Cattle Diseases, HeiLongJiang BaYi Agricultural University, Daqing, China
- Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, HeiLongJiang BaYi Agricultural University, Daqing, China
- Heilongjiang Province Cultivating Collaborative Innovation Center for The Beidahuang Modern Agricultural Industry Technology, HeiLongJiang BaYi Agricultural University, Daqing, China
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9
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Moon J, Oh YM, Ha SJ. Perspectives on immune checkpoint ligands: expression, regulation, and clinical implications. BMB Rep 2021. [PMID: 34078531 PMCID: PMC8411045 DOI: 10.5483/bmbrep.2021.54.8.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In the tumor microenvironment, immune checkpoint ligands (ICLs) must be expressed in order to trigger the inhibitory signal via immune checkpoint receptors (ICRs). Although ICL expression frequently occurs in a manner intrinsic to tumor cells, extrinsic factors derived from the tumor microenvironment can fine-tune ICL expression by tumor cells or prompt non-tumor cells, including immune cells. Considering the extensive interaction between T cells and other immune cells within the tumor microenvironment, ICL expression on immune cells can be as significant as that of ICLs on tumor cells in promoting anti-tumor immune responses. Here, we introduce various regulators known to induce or suppress ICL expression in either tumor cells or immune cells, and concise mechanisms relevant to their induction. Finally, we focus on the clinical significance of understanding the mechanisms of ICLs for an optimized immunotherapy for individual cancer patients.
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Affiliation(s)
- Jihyun Moon
- Department of Biochemistry, College of Life Science & Biotechnology, Yonsei University, Seoul 03722, Korea
- Brain Korea 21 (BK21) FOUR Program, Yonsei Education & Research Center for Biosystems, Yonsei University, Seoul 03722, Korea
| | - Yoo Min Oh
- Department of Biochemistry, College of Life Science & Biotechnology, Yonsei University, Seoul 03722, Korea
- Brain Korea 21 (BK21) FOUR Program, Yonsei Education & Research Center for Biosystems, Yonsei University, Seoul 03722, Korea
| | - Sang-Jun Ha
- Department of Biochemistry, College of Life Science & Biotechnology, Yonsei University, Seoul 03722, Korea
- Brain Korea 21 (BK21) FOUR Program, Yonsei Education & Research Center for Biosystems, Yonsei University, Seoul 03722, Korea
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10
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Chaput L, Jordheim LP. [Current landscape of biomarker development for immune checkpoint inhibitors targeting PD-1/PD-L1 pathway in oncology]. Therapie 2021; 76:597-615. [PMID: 34332787 DOI: 10.1016/j.therap.2021.06.005] [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: 01/07/2021] [Revised: 05/25/2021] [Accepted: 06/29/2021] [Indexed: 12/26/2022]
Abstract
The immune checkpoints inhibitors targeting PD-1 or PD-L1 represent a new paradigm in the cancer treatment strategy. However, some populations of patients do not benefit from these agents. The identification of predictive biomarkers appears as an essential step for the treatment pathway, to guarantee the access to an evidence-based medicine accounting for the potential toxicity profile, the cost for the healthcare system and the clinical benefit eventually provided by these new drugs. In this review, we propose, based on scientific literature and industrial communications, an overview of the current landscape of predictive biomarkers related to PD-1 or PD-L1 inhibitors efficacy, validated or under development, their evidence level, and limits accounting for identified or potential confounding factors. Our paper shows that, despite the important amount of work performed in this field, there is not yet a validated and efficient solution for the prediction of the activity and/or the toxicity of anti-PD-1 and anti-PD-L1 antibodies.
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Affiliation(s)
- Lisa Chaput
- Université Lyon, université Claude-Bernard Lyon 1, faculté de pharmacie de Lyon, ISPB, 69008 Lyon, France
| | - Lars Petter Jordheim
- Université Lyon, université Claude-Bernard Lyon 1, faculté de pharmacie de Lyon, ISPB, 69008 Lyon, France; Université Lyon, université Claude-Bernard Lyon 1, INSERM 1052, CNRS 5286, centre Léon-Bérard, centre de recherche en cancérologie de Lyon, 69008 Lyon, France.
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11
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Comparison of miRNA Expression Profiles between HIV-1 and HIV-2 Infected Monocyte-Derived Macrophages (MDMs) and Peripheral Blood Mononuclear Cells (PBMCs). Int J Mol Sci 2020; 21:ijms21186970. [PMID: 32971935 PMCID: PMC7556008 DOI: 10.3390/ijms21186970] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 09/17/2020] [Accepted: 09/17/2020] [Indexed: 12/13/2022] Open
Abstract
During the progression of HIV-1 infection, macrophage tropic HIV-1 that use the CCR5 co-receptor undergoes a change in co-receptor use to CXCR4 that is predominately T cell tropic. This change in co-receptor preference makes the virus able to infect T cells. HIV-2 is known to infect MDMs and T cells and is dual tropic. The aim of this study was to elucidate the differential expression profiles of host miRNAs and their role in cells infected with HIV-1/HIV-2. To achieve this goal, a comparative global miRNA expression profile was determined in human PBMCs and MDMs infected with HIV-1/HIV-2. Differentially expressed miRNAs were identified in HIV-1/HIV-2 infected PBMCs and MDMs using the next-generation sequencing (NGS) technique. A comparative global miRNA expression profile in infected MDMs and PBMCs with HIV-1 and HIV-2 identified differential expression of several host miRNAs. These differentially expressed miRNAs are likely to be involved in many signaling pathways, like the p53 signaling pathway, PI3K-Akt signaling pathways, MAPK signaling pathways, FoxO signaling pathway, and viral carcinogenesis. Thus, a comparative study of the differential expression of host miRNAs in MDMs and T cell in response to HIV-1 and HIV-2 infection will help us to identify unique biomarkers that can differentiate HIV-1 and HIV-2 infection.
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12
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Humanized Mice as an Effective Evaluation System for Peptide Vaccines and Immune Checkpoint Inhibitors. Int J Mol Sci 2019; 20:ijms20246337. [PMID: 31888191 PMCID: PMC6940818 DOI: 10.3390/ijms20246337] [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: 11/05/2019] [Revised: 12/06/2019] [Accepted: 12/12/2019] [Indexed: 12/16/2022] Open
Abstract
Peptide vaccination was developed for the prevention and therapy of acute and chronic infectious diseases and cancer. However, vaccine development is challenging, because the patient immune system requires the appropriate human leukocyte antigen (HLA) recognition with the peptide. Moreover, antigens sometimes induce a low response, even if the peptide is presented by antigen-presenting cells and T cells recognize it. This is because the patient immunity is dampened or restricted by environmental factors. Even if the immune system responds appropriately, newly-developed immune checkpoint inhibitors (ICIs), which are used to increase the immune response against cancer, make the immune environment more complex. The ICIs may activate T cells, although the ratio of responsive patients is not high. However, the vaccine may induce some immune adverse effects in the presence of ICIs. Therefore, a system is needed to predict such risks. Humanized mouse systems possessing human immune cells have been developed to examine human immunity in vivo. One of the systems which uses transplanted human peripheral blood mononuclear cells (PBMCs) may become a new diagnosis strategy. Various humanized mouse systems are being developed and will become good tools for the prediction of antibody response and immune adverse effects.
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13
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Shen X, Zhang L, Li J, Li Y, Wang Y, Xu ZX. Recent Findings in the Regulation of Programmed Death Ligand 1 Expression. Front Immunol 2019; 10:1337. [PMID: 31258527 PMCID: PMC6587331 DOI: 10.3389/fimmu.2019.01337] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 05/28/2019] [Indexed: 12/11/2022] Open
Abstract
With the recent approvals for the application of monoclonal antibodies that target the well-characterized immune checkpoints, immune therapy shows great potential against both solid and hematologic tumors. The use of these therapeutic monoclonal antibodies elicits inspiring clinical results with durable objective responses and improvements in overall survival. Agents targeting programmed cell death protein 1 (PD-1; also known as PDCD1) and its ligand (PD-L1) achieve a great success in immune checkpoints therapy. However, the majority of patients fail to respond to PD-1/PD-L1 axis inhibitors. Expression of PD-L1 on the membrane of tumor and immune cells has been shown to be associated with enhanced objective response rates to PD-1/PD-L1 inhibition. Thus, an improved understanding of how PD-L1 expression is regulated will enable us to better define its role as a predictive marker. In this review, we summarize recent findings in the regulation of PD-L1 expression.
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Affiliation(s)
- Xiangfeng Shen
- Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, Changchun, China
| | - Lihong Zhang
- Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, Changchun, China
| | - Jicheng Li
- Department of Physiology, College of Basic Medical Sciences, Jilin University, Changchun, China
| | - Yulin Li
- Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, Changchun, China
| | - Yishu Wang
- Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, Changchun, China
| | - Zhi-Xiang Xu
- Key Laboratory of Pathobiology, Ministry of Education, Norman Bethune College of Medicine, Jilin University, Changchun, China
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14
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Li CW, Chen BS. Investigating HIV-Human Interaction Networks to Unravel Pathogenic Mechanism for Drug Discovery: A Systems Biology Approach. Curr HIV Res 2019; 16:77-95. [PMID: 29468972 DOI: 10.2174/1570162x16666180219155324] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 01/18/2018] [Accepted: 02/14/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND Two big issues in the study of pathogens are determining how pathogens infect hosts and how the host defends itself against infection. Therefore, investigating host-pathogen interactions is important for understanding pathogenicity and host defensive mechanisms and treating infections. METHODS In this study, we used omics data, including time-course data from high-throughput sequencing, real-time polymerase chain reaction, and human microRNA (miRNA) and protein-protein interaction to construct an interspecies protein-protein and miRNA interaction (PPMI) network of human CD4+ T cells during HIV-1 infection through system modeling and identification. RESULTS By applying a functional annotation tool to the identified PPMI network at each stage of HIV infection, we found that repressions of three miRNAs, miR-140-5p, miR-320a, and miR-941, are involved in the development of autoimmune disorders, tumor proliferation, and the pathogenesis of T cells at the reverse transcription stage. Repressions of miR-331-3p and miR-320a are involved in HIV-1 replication, replicative spread, anti-apoptosis, cell proliferation, and dysregulation of cell cycle control at the integration/replication stage. Repression of miR-341-5p is involved in carcinogenesis at the late stage of HIV-1 infection. CONCLUSION By investigating the common core proteins and changes in specific proteins in the PPMI network between the stages of HIV-1 infection, we obtained pathogenic insights into the functional core modules and identified potential drug combinations for treating patients with HIV-1 infection, including thalidomide, oxaprozin, and metformin, at the reverse transcription stage; quercetin, nifedipine, and fenbendazole, at the integration/replication stage; and staurosporine, quercetin, prednisolone, and flufenamic acid, at the late stage.
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Affiliation(s)
- Cheng-Wei Li
- Laboratory of Control and Systems Biology, Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Bor-Sen Chen
- Laboratory of Control and Systems Biology, Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan
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15
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Sun C, Mezzadra R, Schumacher TN. Regulation and Function of the PD-L1 Checkpoint. Immunity 2018; 48:434-452. [PMID: 29562194 PMCID: PMC7116507 DOI: 10.1016/j.immuni.2018.03.014] [Citation(s) in RCA: 1365] [Impact Index Per Article: 227.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 03/06/2018] [Accepted: 03/06/2018] [Indexed: 12/14/2022]
Abstract
Expression of programmed death-ligand 1 (PD-L1) is frequently observed in human cancers. Binding of PD-L1 to its receptor PD-1 on activated T cells inhibits anti-tumor immunity by counteracting T cell-activating signals. Antibody-based PD-1-PD-L1 inhibitors can induce durable tumor remissions in patients with diverse advanced cancers, and thus expression of PD-L1 on tumor cells and other cells in the tumor microenviroment is of major clinical relevance. Here we review the roles of the PD-1-PD-L1 axis in cancer, focusing on recent findings on the mechanisms that regulate PD-L1 expression at the transcriptional, posttranscriptional, and protein level. We place this knowledge in the context of observations in the clinic and discuss how it may inform the design of more precise and effective cancer immune checkpoint therapies.
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Affiliation(s)
- Chong Sun
- Division of Molecular Oncology & Immunology, Oncode Institute, the Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, the Netherlands
| | - Riccardo Mezzadra
- Division of Molecular Oncology & Immunology, Oncode Institute, the Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, the Netherlands
| | - Ton N Schumacher
- Division of Molecular Oncology & Immunology, Oncode Institute, the Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, the Netherlands.
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16
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Posttranscriptional Control of PD-L1 Expression by 17β-Estradiol via PI3K/Akt Signaling Pathway in ERα-Positive Cancer Cell Lines. Int J Gynecol Cancer 2018; 27:196-205. [PMID: 27870715 DOI: 10.1097/igc.0000000000000875] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE Estrogen is a well-known oncogenic driver in endometrial (ECs) and breast cancers (BCs). Programmed cell death protein 1 (PD-1) and its ligands PD-1 Ligand 1 (PD-L1) and PD-L2 have been shown to mediate immune evasion of the tumor cells. The purpose of the present study was to assess the effects of estrogen on PD-L1 and PD-L2 expression in EC and BC cell lines. METHODS 17β-Estradiol (E2)-induced expression of PD-L1 and PD-L2 and possible signaling pathway were investigated in EC and BC cells. Coculture of T cells and cancer cells with E2 stimulation was performed to assess the functions of T cells. RESULTS We found that E2 increased expression of PD-L1, but not PD-L2, protein via activation of phosphoinositide 3-kinase (PI3K)/Akt pathway in Ishikawa and Michigan Cancer Foundation-7 (MCF-7) cells. Phosphoinositide 3-kinase and Akt inhibitors could block E2's effects. 17β-Estradiol did not increase PD-L1 mRNA transcription, but stabilized PD-L1 mRNA. 17β-Estradiol's effects were only observed in estrogen receptor α (ERα)-positive Ishikawa and MCF-7 cells, but not in ERα-negative MDA-MB-231 cells. Coculture of Ishikawa or MCF-7 cells with T cells inhibited expression of interferon-γ and interleukin-2 and increased BCL-2-interacting mediator of cell death expression in the presence of E2. CONCLUSIONS This study provides the first evidence that estrogen upregulates PD-L1 protein expression in ERα-positive EC and BC cells to suppress immune functions of T cells in the tumor microenvironment, demonstrating a new mechanism of how estrogen drives cancer progression.
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17
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Cao X, Zhao Y, Wang J, Dai B, Gentile E, Lin J, Pu X, Ji L, Wu S, Meraz I, Majidi M, Roth JA. TUSC2 downregulates PD-L1 expression in non-small cell lung cancer (NSCLC). Oncotarget 2017; 8:107621-107629. [PMID: 29296193 PMCID: PMC5746095 DOI: 10.18632/oncotarget.22581] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 11/01/2017] [Indexed: 12/21/2022] Open
Abstract
Expression of the TUSC2 tumor-suppressor gene in TUSC2-deficient NSCLC cells decreased PD-L1 expression and inhibited mTOR activity. Overexpressing TUSC2 or treatment with rapamycin resulted in similar inhibition of PD-L1 expression. Both TUSC2 and rapamycin decreased p70 and SK6 phosphorylation, suggesting that TUSC2 and rapamycin share the same mTOR target. Microarray mRNA expression analysis using TUSC2-inducible H1299 showed that genes that negatively regulate the mTOR pathway were significantly upregulated by TUSC2 compared with control. The presence of IFN-γ significantly increased PD-L1 expression in lung cancer cell lines, but overexpressing TUSC2 in these cell lines prevented PD-L1 from increasing in the presence of IFN-γ. Taken together, these findings show that TUSC2 can decrease PD-L1 expression in lung cancer cells. This ability to modify the tumor microenvironment suggests that TUSC2 could be added to checkpoint inhibitors to improve the treatment of lung cancer.
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Affiliation(s)
- Xiaobo Cao
- Department of Thoracic and Cardiovascular Surgery, Section of Thoracic Molecular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Yang Zhao
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jing Wang
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Bingbing Dai
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Emanuela Gentile
- Department of Thoracic and Cardiovascular Surgery, Section of Thoracic Molecular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jing Lin
- Department of Thoracic and Cardiovascular Surgery, Section of Thoracic Molecular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Xingxiang Pu
- Department of Thoracic Medical Oncology, Hunan Cancer Hospital, Changsha, China
| | - Lin Ji
- Department of Thoracic and Cardiovascular Surgery, Section of Thoracic Molecular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Shuhong Wu
- Department of Thoracic and Cardiovascular Surgery, Section of Thoracic Molecular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Ismail Meraz
- Department of Thoracic and Cardiovascular Surgery, Section of Thoracic Molecular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Mourad Majidi
- Department of Thoracic and Cardiovascular Surgery, Section of Thoracic Molecular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jack A Roth
- Department of Thoracic and Cardiovascular Surgery, Section of Thoracic Molecular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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18
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Oteiza A, Mechti N. FoxO4 negatively controls Tat-mediated HIV-1 transcription through the post-transcriptional suppression of Tat encoding mRNA. J Gen Virol 2017; 98:1864-1878. [PMID: 28699853 DOI: 10.1099/jgv.0.000837] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The connection between the repression of human immunodeficiency virus type 1(HIV-1) transcription and the resting CD4+ T cell state suggests that the host transcription factors involved in the active maintenance of lymphocyte quiescence are likely to repress the viral transactivator, Tat, thereby restricting HIV-1 transcription. In this study, we analysed the interplay between Tat and the forkhead box transcription factors, FoxO1 and FoxO4. We show that FoxO1 and FoxO4 antagonize Tat-mediated transactivation of HIV-1 promoter through the repression of Tat protein expression. No effect was observed on the expression of two HIV-1 accessory proteins, Vif and Vpr. Unexpectedly, we found that FoxO1 and FoxO4 expression causes a strong dose-dependent post-transcriptional suppression of Tat mRNA, indicating that FoxO should effectively inhibit HIV-1 replication by destabilizing Tat mRNA and suppressing Tat-mediated HIV-1 transcription. In accordance with this, we observed that the Tat mRNA half-life is reduced by FoxO4 expression. The physiological relevance of our findings was validated using the J-Lat 10.6 model of latently infected cells. We demonstrated that the overexpression of a constitutively active FoxO4-TM mutant antagonized HIV-1 transcription reactivation in response to T cell activators, such as TNF-α or PMA. Altogether, our findings demonstrate that FoxO factors can control HIV-1 transcription and provide new insights into their potential role during the establishment of HIV-1 latency.
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Affiliation(s)
- Alexandra Oteiza
- CNRS UMR5235, DIMNP, Université de Montpellier, Bat 24, CC107, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
| | - Nadir Mechti
- CNRS UMR5235, DIMNP, Université de Montpellier, Bat 24, CC107, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
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19
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Wang X, Yang L, Huang F, Zhang Q, Liu S, Ma L, You Z. Inflammatory cytokines IL-17 and TNF-α up-regulate PD-L1 expression in human prostate and colon cancer cells. Immunol Lett 2017; 184:7-14. [PMID: 28223102 DOI: 10.1016/j.imlet.2017.02.006] [Citation(s) in RCA: 225] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 01/25/2017] [Accepted: 02/10/2017] [Indexed: 02/05/2023]
Abstract
Programmed cell death protein 1 (PD-1) acts on PD-1 ligands (PD-L1 and PD-L2) to suppress activation of cytotoxic T lymphocytes. Interleukin-17 (IL-17) and tumor necrosis factor-α (TNF-α) are co-expressed by T helper 17 (TH17) cells in many tumors. The purpose of this study was to test if IL-17 and TNF-α may synergistically induce PD-L1 expression in human prostate cancer LNCaP and human colon cancer HCT116 cell lines. We found that IL-17 did not induce PD-L1 mRNA expression, but up-regulated PD-L1 protein expression in HCT116 and LNCaP cells. TNF-α induced PD-L1 mRNA and protein expression in both cell lines. Neither IL-17 nor TNF-α induced PD-L2 mRNA or protein expression. IL-17 and TNF-α acted individually rather than cooperatively in induction of PD-L1 expression. IL-17 and/or TNF-α activated AKT, nuclear factor-κB (NF-κB), and extracellular signal-regulated kinases 1/2 (ERK1/2) signaling pathways in HCT116 cells, whereas only NF-κB signaling was activated in LNCaP cells. NF-κB inhibitor could diminish PD-L1 protein expression induced by IL-17 and/or TNF-α in both HCT116 and LNCaP cell lines. ERK1/2 inhibitor could also reduce PD-L1 protein expression induced by IL-17 and/or TNF-α in HCT116 cells, while AKT inhibitor could abolish PD-L1 protein expression induced by IL-17 and/or TNF-α in LNCaP cells. These results suggest that IL-17 and TNF-α act individually rather than cooperatively through activation of NF-κB and ERK1/2 signaling to up-regulate PD-L1 expression in HCT116 cells, while the two inflammatory cytokines act through activation of NF-κB signaling, in the presence of AKT activity, to up-regulate PD-L1 expression in LNCaP cells.
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Affiliation(s)
- Xun Wang
- Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, LA 70112, USA; Department of Gastroenterology, Wuchang Hospital, Wuhan 430063, China.
| | - Lingyun Yang
- Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, LA 70112, USA; Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, China.
| | - Feng Huang
- Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, LA 70112, USA; Department of Clinical Medicine, The First Affiliated Hospital, Shanxi University of Chinese Medicine, Xianyang 712046, China.
| | - Qiuyang Zhang
- Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, LA 70112, USA.
| | - Sen Liu
- Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, LA 70112, USA.
| | - Lin Ma
- Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, LA 70112, USA; Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China.
| | - Zongbing You
- Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, LA 70112, USA; Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, LA 70112, USA.
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20
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Lastwika KJ, Wilson W, Li QK, Norris J, Xu H, Ghazarian SR, Kitagawa H, Kawabata S, Taube JM, Yao S, Liu LN, Gills JJ, Dennis PA. Control of PD-L1 Expression by Oncogenic Activation of the AKT-mTOR Pathway in Non-Small Cell Lung Cancer. Cancer Res 2015; 76:227-38. [PMID: 26637667 DOI: 10.1158/0008-5472.can-14-3362] [Citation(s) in RCA: 545] [Impact Index Per Article: 60.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 09/20/2015] [Indexed: 12/30/2022]
Abstract
Alterations in EGFR, KRAS, and ALK are oncogenic drivers in lung cancer, but how oncogenic signaling influences immunity in the tumor microenvironment is just beginning to be understood. Immunosuppression likely contributes to lung cancer, because drugs that inhibit immune checkpoints like PD-1 and PD-L1 have clinical benefit. Here, we show that activation of the AKT-mTOR pathway tightly regulates PD-L1 expression in vitro and in vivo. Both oncogenic and IFNγ-mediated induction of PD-L1 was dependent on mTOR. In human lung adenocarcinomas and squamous cell carcinomas, membranous expression of PD-L1 was significantly associated with mTOR activation. These data suggest that oncogenic activation of the AKT-mTOR pathway promotes immune escape by driving expression of PD-L1, which was confirmed in syngeneic and genetically engineered mouse models of lung cancer where an mTOR inhibitor combined with a PD-1 antibody decreased tumor growth, increased tumor-infiltrating T cells, and decreased regulatory T cells.
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Affiliation(s)
- Kristin J Lastwika
- Department of Oncology, Johns Hopkins University, Baltimore, Maryland. The George Washington University, Institute for Biomedical Sciences, Washington, DC
| | - Willie Wilson
- Cancer Biology and Genetics Branch, Center for Cancer Research, National Institutes of Health, Bethesda, Maryland
| | - Qing Kay Li
- Department of Pathology, Johns Hopkins University, Baltimore, Maryland
| | - Jeffrey Norris
- Department of Oncology, Johns Hopkins University, Baltimore, Maryland
| | - Haiying Xu
- Department of Dermatology, Johns Hopkins University, Baltimore, Maryland
| | - Sharon R Ghazarian
- Biostatistics, Epidemiology and Data Management Core, Johns Hopkins University, Baltimore, Maryland
| | - Hiroshi Kitagawa
- Department of Oncology, Johns Hopkins University, Baltimore, Maryland
| | - Shigeru Kawabata
- Department of Oncology, Johns Hopkins University, Baltimore, Maryland
| | - Janis M Taube
- Department of Dermatology, Johns Hopkins University, Baltimore, Maryland
| | - Sheng Yao
- Amplimmune, Inc., Gaithersburg, Maryland
| | | | - Joell J Gills
- Department of Oncology, Johns Hopkins University, Baltimore, Maryland
| | - Phillip A Dennis
- Department of Oncology, Johns Hopkins University, Baltimore, Maryland.
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21
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Velu V, Shetty RD, Larsson M, Shankar EM. Role of PD-1 co-inhibitory pathway in HIV infection and potential therapeutic options. Retrovirology 2015; 12:14. [PMID: 25756928 PMCID: PMC4340294 DOI: 10.1186/s12977-015-0144-x] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 01/18/2015] [Indexed: 02/07/2023] Open
Abstract
Virus-specific CD8+ T cells play an important role in controlling viral infections including human immunodeficiency virus (HIV) infection. However, during chronic HIV infection, virus-specific CD8+ T cells undergo functional exhaustion, lose effector functions and fail to control viral infection. HIV-specific CD8 T cells expressing high levels of co-inhibitory molecule programmed death-1 (PD-1) during the chronic infection and are characterized by lower proliferation, cytokine production, and cytotoxic abilities. Although, antiretroviral therapy has resulted in dramatic decline in HIV replication, there is no effective treatment currently available to eradicate viral reservoirs or restore virus-specific T or B-cell functions that may complement ART in order to eliminate the virus. In recent years, studies in mice and non-human primate models of HIV infection demonstrated the functional exhaustion of virus-specific T and B cells could be reversed by blockade of interaction between PD-1 and its cognate ligands (PD-L1 and PD-L2). In this review, we discuss recent advances in our understanding of PD-1 pathway in HIV/SIV infection and discuss the beneficial effects of PD-1 blockade during chronic HIV/SIV infection and its potential role as immunotherapy for HIV/AIDS.
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Co-Administration of Molecular Adjuvants Expressing NF-Kappa B Subunit p65/RelA or Type-1 Transactivator T-bet Enhance Antigen Specific DNA Vaccine-Induced Immunity. Vaccines (Basel) 2014; 2:196-215. [PMID: 26344618 PMCID: PMC4494262 DOI: 10.3390/vaccines2020196] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 01/31/2014] [Accepted: 02/28/2014] [Indexed: 12/26/2022] Open
Abstract
DNA vaccine-induced immunity can be enhanced by the co-delivery of synthetic gene-encoding molecular adjuvants. Many of these adjuvants have included cytokines, chemokines or co-stimulatory molecules that have been demonstrated to enhance vaccine-induced immunity by increasing the magnitude or type of immune responses and/or protective efficacy. In this way, through the use of adjuvants, immune responses can be highly customizable and functionally tailored for optimal efficacy against pathogen specific (i.e., infectious agent) or non-pathogen (i.e., cancer) antigens. In the novel study presented here, we examined the use of cellular transcription factors as molecular adjuvants. Specifically the co-delivery of (a) RelA, a subunit of the NF-κB transcription complex or (b) T-bet, a Th1-specific T box transcription factor, along with a prototypical DNA vaccine expressing HIV-1 proteins was evaluated. As well, all of the vaccines and adjuvants were administered to mice using in vivo electroporation (EP), a technology demonstrated to dramatically increase plasmid DNA transfection and subsequent transgene expression with concomitant enhancement of vaccine induced immune responses. As such, this study demonstrated that co-delivery of either adjuvant resulted in enhanced T and B cell responses, specifically characterized by increased T cell numbers, IFN-γ production, as well as enhanced antibody responses. This study demonstrates the use of cellular transcription factors as adjuvants for enhancing DNA vaccine-induced immunity.
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HIV-1 Env DNA vaccine plus protein boost delivered by EP expands B- and T-cell responses and neutralizing phenotype in vivo. PLoS One 2013; 8:e84234. [PMID: 24391921 PMCID: PMC3877240 DOI: 10.1371/journal.pone.0084234] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 11/13/2013] [Indexed: 02/07/2023] Open
Abstract
An effective HIV vaccine will most likely require the induction of strong T-cell responses, broadly neutralizing antibodies (bNAbs), and the elicitation of antibody-dependent cellular cytotoxicity (ADCC). Previously, we demonstrated the induction of strong HIV/SIV cellular immune responses in macaques and humans using synthetic consensus DNA immunogens delivered via adaptive electroporation (EP). However, the ability of this improved DNA approach to prime for relevant antibody responses has not been previously studied. Here, we investigate the immunogenicity of consensus DNA constructs encoding gp140 sequences from HIV-1 subtypes A, B, C and D in a DNA prime-protein boost vaccine regimen. Mice and guinea pigs were primed with single- and multi-clade DNA via EP and boosted with recombinant gp120 protein. Sera were analyzed for gp120 binding and induction of neutralizing antibody activity. Immunization with recombinant Env protein alone induced low-titer binding antibodies with limited neutralization breath. In contrast, the synthetic DNA prime-protein boost protocol induced significantly higher antibody binding titers. Furthermore, sera from DNA prime-protein boost groups were able to neutralize a broader range of viruses in a panel of tier 1 clade B viruses as well as multiple tier 1 clade A and clade C viruses. Further investigation of synthetic DNA prime plus adaptive EP plus protein boost appears warranted.
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Muthumani K, Flingai S, Wise M, Tingey C, Ugen KE, Weiner DB. Optimized and enhanced DNA plasmid vector based in vivo construction of a neutralizing anti-HIV-1 envelope glycoprotein Fab. Hum Vaccin Immunother 2013; 9:2253-62. [PMID: 24045230 DOI: 10.4161/hv.26498] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Monoclonal antibody preparations have demonstrated considerable clinical utility in the treatment of specific malignancies, as well as inflammatory and infectious diseases. Antibodies are conventionally delivered by passive administration, typically requiring costly large-scale laboratory development and production. Additional limitations include the necessity for repeat administrations, and the length of in vivo potency. Therefore, the development of methods to generate therapeutic antibodies and antibody like molecules in vivo, distinct from an active antigen-based immunization strategy, would have considerable clinical utility. In fact, adeno-associated viral (AAV) vector mediated delivery of immunoglobulin genes with subsequent generation of functional antibodies has recently been developed. As well, anon-viral vector mediated nucleic acid based delivery technology could permit the generation of therapeutic/prophylactic antibodies in vivo, obviating potential safety issues associated with viral vector based gene delivery. This delivery strategy has limitations as well, mainly due to very low in vivo production and expression of protein from the delivered gene. In the study reported here we have constructed an "enhanced and optimized" DNA plasmid technology to generate immunoglobulin heavy and light chains (i.e., Fab fragments) from an established neutralizing anti-HIV envelope glycoprotein monoclonal antibody (VRC01). This "enhanced" DNA (E-DNA) plasmid technology includes codon/RNA optimization, leader sequence utilization, as well as targeted potentiation of delivery and expression of the Fab immunoglobulin genes through use of "adaptive" in vivo electroporation. The results demonstrate that delivery by this method of a single administration of the optimized Fab expressing constructs resulted in generation of Fab molecules in mouse sera possessing high antigen specific binding and HIV neutralization activity for at least 7 d after injection, against diverse HIV isolates. Importantly, this delivery strategy resulted in a rapid increase (i.e., in as little as 48 h) in Fab levels when compared with protein-based immunization. The active generation of functional Fab molecules in vivo has important conceptual and practical advantages over conventional ex vivo generation, purification and passive delivery of biologically active antibodies. Further study of this technique for the rapid generation and delivery of immunoglobulin and immunoglobulin like molecules is highly relevant and timely.
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Affiliation(s)
- Kar Muthumani
- Department of Pathology and Laboratory Medicine; University of Pennsylvania School of Medicine; Philadelphia, PA USA
| | - Seleeke Flingai
- Department of Pathology and Laboratory Medicine; University of Pennsylvania School of Medicine; Philadelphia, PA USA
| | - Megan Wise
- Department of Pathology and Laboratory Medicine; University of Pennsylvania School of Medicine; Philadelphia, PA USA
| | - Colleen Tingey
- Department of Pathology and Laboratory Medicine; University of Pennsylvania School of Medicine; Philadelphia, PA USA
| | - Kenneth E Ugen
- Department of Molecular Medicine; University of South Florida Morsani College of Medicine; Tampa, FL USA; Center for Molecular Delivery; University of South Florida; Tampa, FL USA
| | - David B Weiner
- Department of Pathology and Laboratory Medicine; University of Pennsylvania School of Medicine; Philadelphia, PA USA
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Abstract
Some of the most successful pathogens of human, such as Mycobacterium tuberculosis (Mtb), HIV, and Leishmania donovani not only establish chronic infections but also remain a grave global threat. These pathogens have developed innovative strategies to evade immune responses such as antigenic shift and drift, interference with antigen processing/presentation, subversion of phagocytosis, induction of immune regulatory pathways, and manipulation of the costimulatory molecules. Costimulatory molecules expressed on the surface of various cells play a decisive role in the initiation and sustenance of immunity. Exploitation of the “code of conduct” of costimulation pathways provides evolutionary incentive to the pathogens and thereby abates the functioning of the immune system. Here we review how Mtb, HIV, Leishmania sp., and other pathogens manipulate costimulatory molecules to establish chronic infection. Impairment by pathogens in the signaling events delivered by costimulatory molecules may be responsible for defective T-cell responses; consequently organisms grow unhindered in the host cells. This review summarizes the convergent devices that pathogens employ to tune and tame the immune system using costimulatory molecules. Studying host-pathogen interaction in context with costimulatory signals may unveil the molecular mechanism that will help in understanding the survival/death of the pathogens. We emphasize that the very same pathways can potentially be exploited to develop immunotherapeutic strategies to eliminate intracellular pathogens.
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Abstract
Major advances in Antiretroviral Therapy (ART) have resulted in a dramatic decline in HIV-related deaths. However, no current treatment regimen leads to viral eradication or restoration of HIV-specific immune responses capable of durable viral control after cessation of ART. Thus, there is a need for novel interventions that could complement ART in order to eliminate virus or reach a state of "functional cure." It has been shown in murine models and humans that the negative co-signaling molecule programmed-death 1 (PD-1) plays an active and reversible role in mediating T-cell exhaustion in chronic infections. This review summarizes recent advances in our understanding of the PD-1 pathway in HIV infection, and the lessons learned from studies in the SIV model and cancer. We discuss the potential of immunotherapeutic interventions targeting PD-1 in order to augment immune responses or facilitate viral eradication. We also present the challenges to therapies targeting immunoregulatory networks.
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Affiliation(s)
- Filippos Porichis
- Ragon Institute of MGH, MIT, and Harvard, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
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Ahmed Z, Czubala M, Blanchet F, Piguet V. HIV impairment of immune responses in dendritic cells. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 762:201-38. [PMID: 22975877 DOI: 10.1007/978-1-4614-4433-6_8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Dendritic cells and their subsets are diverse populations of immune cells in the skin and mucous membranes that possess the ability to sense the presence of microbes and orchestrate an efficient and adapted immune response. Dendritic cells (DC) have the unique ability to act as a bridge between the innate and adaptive immune responses. These cells are composed of a number of subsets behaving with preferential and specific features depending on their location and surrounding environment. Langerhans cells (LC) or dermal DC (dDC) are readily present in mucosal areas. Other DC subsets such as plasmacytoid DC (pDC), myeloid DC (myDC), or monocyte-derived DC (MDDC) are thought to be recruited or differentiated in sites of pathogenic challenge. Upon HIV infection, DC and their subsets are likely among the very first immune cells to encounter incoming pathogens and initiate innate and adaptive immune responses. However, as evidenced during HIV infection, some pathogens have evolved subtle strategies to hijack key cellular machineries essential to generate efficient antiviral responses and subvert immune responses for spread and survival.In this chapter, we review recent research aimed at investigating the involvement of DC subtypes in HIV transmission at mucosal sites, concentrating on HIV impact on cellular signalling and trafficking pathways in DC leading to DC-mediated immune response alterations and viral immune evasion. We also address some aspects of DC functions during the chronic immune pathogenesis and conclude with an overview of the current and novel therapeutic and prophylactic strategies aimed at improving DC-mediated immune responses, thus to potentially tackle the early events of mucosal HIV infection and spread.
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Affiliation(s)
- Zahra Ahmed
- Department of Dermatology and Wound Healing, Cardiff University School of Medicine, Cardiff, Wales, UK
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