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Zhang L, Mao J, Lian Y, Liang Q, Li W, Zhao J, Pan H, Gao Z, Fang L, Yuan W, Chu Y, Shi J. Mass cytometry analysis identifies T cell immune signature of aplastic anemia and predicts the response to cyclosporine. Ann Hematol 2023; 102:529-539. [PMID: 36680600 PMCID: PMC9862246 DOI: 10.1007/s00277-023-05097-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 01/02/2023] [Indexed: 01/22/2023]
Abstract
Aplastic anemia (AA) is an auto-activated T cell-mediated bone marrow failure. Cyclosporine is often used to treat non-severe AA, which demonstrates a more heterogeneous condition than severe AA. The response rate to cyclosporine is only around 50% in non-severe AA. To better predict response to cyclosporine and pinpoint who is the appropriate candidate for cyclosporine, we performed phenotypic and functional T cell immune signature at single cell level by mass cytometry from 30 patients with non-severe AA. Unexpectedly, non-significant differences of T cell subsets were observed between AA and healthy control or cyclosporine-responder and non-responders. Interestingly, when screening the expression of co-inhibitory molecules, T cell trafficking mediators, and cytokines, we found an increase of cytotoxic T lymphocyte antigen 4 (CTLA-4) on T cells in response to cyclosporine and a lower level of CTLA-4 on CD8+ T cells was correlated to hematologic response. Moreover, a decreased expression of sphingosine-1-phosphate receptor 1 (S1P1) on naive T cells and a lower level of interleukin-9 (IL-9) on T helpers also predicted a better response to cyclosporine, respectively. Therefore, the T cell immune signature, especially in CTAL-4, S1P1, and IL-9, has a predictive value for response to cyclosporine. Collectively, our study implies that immune signature analysis of T cell by mass cytometry is a useful tool to make a strategic decision on cyclosporine treatment of AA.
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Affiliation(s)
- Lele Zhang
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 288 Nanjing Road, Heping District, Tianjin, 300020, China
| | - Jin Mao
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 288 Nanjing Road, Heping District, Tianjin, 300020, China
| | - Yu Lian
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 288 Nanjing Road, Heping District, Tianjin, 300020, China
| | - Qian Liang
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 288 Nanjing Road, Heping District, Tianjin, 300020, China
| | - Weiwang Li
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 288 Nanjing Road, Heping District, Tianjin, 300020, China
| | - Jingyu Zhao
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 288 Nanjing Road, Heping District, Tianjin, 300020, China
| | - Hong Pan
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 288 Nanjing Road, Heping District, Tianjin, 300020, China
| | - Zhen Gao
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 288 Nanjing Road, Heping District, Tianjin, 300020, China
| | - Liwei Fang
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 288 Nanjing Road, Heping District, Tianjin, 300020, China
| | - Weiping Yuan
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 288 Nanjing Road, Heping District, Tianjin, 300020, China
| | - Yajing Chu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 288 Nanjing Road, Heping District, Tianjin, 300020, China.
| | - Jun Shi
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 288 Nanjing Road, Heping District, Tianjin, 300020, China.
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Immune Checkpoint Inhibitor-Related Cytopenias: About 68 Cases from the French Pharmacovigilance Database. Cancers (Basel) 2022; 14:cancers14205030. [PMID: 36291814 PMCID: PMC9599380 DOI: 10.3390/cancers14205030] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/04/2022] [Accepted: 10/11/2022] [Indexed: 11/24/2022] Open
Abstract
Simple Summary Data on immune checkpoint inhibitor (ICI)-related cytopenias are scarce. The aim of the study was to further characterize grade ≥ 2 ICI-related cytopenias using the French pharmacovigilance database. Immune thrombocytopenia and autoimmune hemolytic anemia were the most frequently reported ICI-related cytopenias (50.7% and 25.3%, respectively). Nearly half were grade ≥ 4, and 4.4% of patients died from cytopenia-related complications. Using the French pharmacovigilance database, this study provides a comprehensive analysis of ICI-related cytopenias that are rare but potentially life-threatening adverse drug reactions. Early recognition and timely initiation of appropriate treatment are key in their management in clinical practice. Abstract Immune checkpoint inhibitor (ICI)-related cytopenias have been poorly described. This study aimed to further characterize ICI-related cytopenias, using the French pharmacovigilance database. All grade ≥ 2 hematological adverse drug reactions involving at least one ICI coded as suspected or interacting drug according to the World Health Organization criteria and reported up to 31 March 2022, were extracted from the French pharmacovigilance database. Patients were included if they experienced ICI-related grade ≥ 2 cytopenia. We included 68 patients (75 ICI-related cytopenias). Sixty-three percent were male, and the median age was 63.0 years. Seven patients (10.3%) had a previous history of autoimmune disease. Immune thrombocytopenia (ITP) and autoimmune hemolytic anemia (AIHA) were the most frequently reported (50.7% and 25.3%, respectively). The median time to onset of ICI-related cytopenias was 2 months. Nearly half were grade ≥ 4, and three patients died from bleeding complications of refractory ITP and from thromboembolic disease with active AIHA. Out of 61 evaluable responses, complete or partial remission was observed after conventional treatment in 72.1% of ICI-related cytopenias. Among the 10 patients with ICI resumption after grade ≥ 2 ICI-related cytopenia, three relapsed. ICI-related cytopenias are rare but potentially life-threatening. Further studies are needed to identify risk factors of ICI-related cytopenias.
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Michot JM, Lazarovici J, Tieu A, Champiat S, Voisin AL, Ebbo M, Godeau B, Michel M, Ribrag V, Lambotte O. Haematological immune-related adverse events with immune checkpoint inhibitors, how to manage? Eur J Cancer 2019; 122:72-90. [PMID: 31634647 DOI: 10.1016/j.ejca.2019.07.014] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 07/21/2019] [Accepted: 07/23/2019] [Indexed: 01/06/2023]
Abstract
Immune checkpoint inhibitors (ICIs) are changing the treatments of many patients with cancer. These immunotherapies are generally better tolerated than chemotherapy, and their adverse events are immune-related mimicking autoimmune or inflammatory conditions. Although these immune-related adverse events mainly affect the skin, endocrine glands, digestive tract, joints, liver or lungs, all the organs can be theoretically affected, and the haematopoietic system is not spared. This review of the literature will focus on the haematological immune-related adverse events (Haem-irAEs). By reviewing the largest clinical trials of ICIs, we estimate the frequency of Haem-irAEs at 3.6% for all grades and 0.7% for grades III-IV. Frequency of Haem-irAEs of all grades was found to be higher with anti-programmed cell death 1 (4.1%) or anti-programmed cell death ligand 1 (4.7%) than with anti-cytotoxic T-lymphocyte-associated protein 4 (0.5%) (p < 0.0001). From the 63 cases with Haem-irAEs reported in the literature, the mean time to the onset was found to be 10 weeks after ICI initiation, and the large range for occurrence (1-84 weeks) and the regular incidence suggest that Haem-irAEs could occur at any time after ICI therapy. Among the 63 reported cases with Haem-irAEs, the distribution was immune thrombocytopenia (n = 18, 29%), pancytopenia or immune aplastic anaemia (n = 12, 19%), neutropenia (n = 11, 17%), haemolytic anaemia (n = 10, 16%), cytokine release syndrome with haemophagocytic syndrome (n = 7, 11%) and other Haem-irAEs including bicytopenia or pure red cell aplasia (n = 5, 8%). Haem-irAEs are generally highly severe adverse reactions with a mortality rate of Haem-irAEs reported to be 14% (9 deaths among the 63 cases reported). The more severe and life-threatening Haem-irAEs were both cytokine release syndrome with haemophagocytic syndrome and pancytopenia or aplastic anaemia. Haem-irAEs induced by ICIs are potentially life-threatening. By discussing their pathophysiological aspects and clinical picture, we propose in this review clinical guidelines for management.
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Affiliation(s)
- J M Michot
- Gustave Roussy, Université Paris-Saclay, Département des Innovations Thérapeutiques et Essais Précoces, Villejuif, F-94805, France; Assistance Publique - Hôpitaux de Paris, Hôpital Bicêtre, Médecine Interne et Immunologie Clinique, Le Kremlin-Bicêtre, F-94275, France.
| | - J Lazarovici
- Gustave Roussy, Université Paris-Saclay, Département D'Hématologie, Villejuif, F-94805, France
| | - A Tieu
- Assistance Publique - Hôpitaux de Paris, Hôpital Bicêtre, Médecine Interne et Immunologie Clinique, Le Kremlin-Bicêtre, F-94275, France
| | - S Champiat
- Gustave Roussy, Université Paris-Saclay, Département des Innovations Thérapeutiques et Essais Précoces, Villejuif, F-94805, France
| | - A L Voisin
- Gustave Roussy, Université Paris-Saclay, Unité de Pharmacovigilance, Villejuif, F-94805, France
| | - M Ebbo
- Assistance Publique - Hôpitaux de Marseille, Hôpital de La Timone, Médecine Interne, Marseille, F-13005, France
| | - B Godeau
- Assistance Publique - Hôpitaux de Paris, Hôpital Henri Mondor, Médecine Interne, Centre de Référence des Cytopénies Auto-immunes de L'Adulte, Université Paris-Est Créteil, Créteil, F-94010, France
| | - M Michel
- Assistance Publique - Hôpitaux de Paris, Hôpital Henri Mondor, Médecine Interne, Centre de Référence des Cytopénies Auto-immunes de L'Adulte, Université Paris-Est Créteil, Créteil, F-94010, France
| | - V Ribrag
- Gustave Roussy, Université Paris-Saclay, Département des Innovations Thérapeutiques et Essais Précoces, Villejuif, F-94805, France; Gustave Roussy, Université Paris-Saclay, Département D'Hématologie, Villejuif, F-94805, France
| | - O Lambotte
- Assistance Publique - Hôpitaux de Paris, Hôpital Bicêtre, Médecine Interne et Immunologie Clinique, Le Kremlin-Bicêtre, F-94275, France; INSERM U1184, Immunology of Viral Infections and Autoimmune Diseases, Le Kremlin-Bicêtre, F-94276, France; Université Paris Sud, UMR 1184, Le Kremlin-Bicêtre, F-94276, France; CEA, DSV/iMETI, IDMIT, Fontenay-aux-Roses, F-92265, France
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PD-1 deficiency augments bone marrow failure in a minor-histocompatibility antigen mismatch lymphocyte infusion model. Exp Hematol 2018. [PMID: 29524567 DOI: 10.1016/j.exphem.2018.03.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Although PD-1 blockade has revolutionized cancer immunotherapy, immune-related adverse events (irAEs) present life-threatening complications. Recent reports of aplastic anemia (AA) as irAEs implicate PD-1/PD-L1 as important in preventing immune-mediated destruction of the hematopoietic niche. Infusion of PD-1-deficient (PD-1 knockout [KO]) lymph node (LN) cells into minor-antigen mismatched mice resulted in early mortality, as well as more severe bone marrow (BM) hypoplasia, anemia, and BM microarchitecture disruption in PD-1 KO LN-infused mice relative to mice that received B6 LN cell infusion. Mice that received PD-1 KO LN cells had more CD8+ T-cell infiltration of the BM and greater expansion of H60-specific CD8+ T cells than did their B6 LN-infused counterparts. In the spleen, CD8+ T cells were skewed to an effector memory phenotype, suggesting accelerated differentiation of PD-1 KO T cells. Our data suggest that PD-1 dysregulation has a role in murine BM failure and vigilance in irAE monitoring may be desirable to treat early AA and related cytopenias.
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Luo X, Lu H, Xiu B, Wu H, Li B, Li P, Chen Y, Zhou L, Zhang W, Dong Y, Liang A, Ding Y. Efficacy and safety of combined immunosuppressive therapy plus umbilical cord blood infusion in severe aplastic anemia patients: A cohort study. Exp Ther Med 2017; 15:1966-1974. [PMID: 29434791 PMCID: PMC5776653 DOI: 10.3892/etm.2017.5616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 08/22/2017] [Indexed: 12/22/2022] Open
Abstract
The present study aimed to evaluate the efficacy and safety of combined immunosuppressive therapy (IST) plus umbilical cord blood infusion (UCBI) in severe aplastic anemia (SAA) patients. A total of 68 patients with SAA were enrolled in the current prospective cohort study and divided into the IST (n=35; positive control) and IST+UCBI (n=33; experimental) groups according to the treatment conditions. Patients in the IST group were treated with rabbit antithymocyte globulin (r-ATG) at a dose of 2.5 mg/kg through intravenous infusion once a day for five days. This was combined with oral cyclosporine A (CsA) at a dose of 3–5 mg/kg twice a day for 2 years. Patients in the IST+UBCI group were treated with r-ATG and CsA at the same doses and frequencies as the IST group plus one UCBI 1 day after the final treatment with r-ATG. At 6 months post treatment, the complete response and overall response rate (ORR) of the IST+UCBI group were markedly higher compared with those in the IST group. Furthermore, patients in the IST+UCBI group achieved absolute neutrophil count (ANC) and platelet count responses more rapidly as compared with the IST group. However, no difference in the hemoglobin (Hb) response was identified between the two groups. In addition, SAA patients achieved responses in the ANC and platelet count more rapidly in comparison with very severe aplastic anemia (VSAA) patients, while the number of days to Hb responses were similar in the SAA and VSAA patients. Multivariate logistic regression analysis also revealed that IST+UCBI treatment was an independent predicting factor for patients achieving complete response or partial response, whereas VSAA was an independent predictor of a worse ORR. Platelet and reticulocyte were also independent predicting factors. Finally, the survival of patients was similar between the groups, and no difference in the safety of the treatment was observed. In conclusion, combined IST plus UCBI treatment may be applied as an effective and safe therapy for SAA patients.
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Affiliation(s)
- Xiu Luo
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Huina Lu
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Bing Xiu
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Hao Wu
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Bing Li
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Ping Li
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Yuhua Chen
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Lili Zhou
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Wenjun Zhang
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Yan Dong
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Aibin Liang
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Yi Ding
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
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Pouladian M, Ganjalikhani-Hakemi M, Alsahebfosul F, Homayouni V, Khosravi S, Etemadifar M, Mazrouei F, Salehi R. The +4259A>C polymorphism of TIM-3 but not -1637C>T polymorphism of TIM-1 is associated with Multiple sclerosis in Isfahan population. Mult Scler Relat Disord 2017; 18:152-156. [PMID: 29141799 DOI: 10.1016/j.msard.2017.09.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 09/24/2017] [Accepted: 09/27/2017] [Indexed: 02/08/2023]
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Qiao X, Jiang K, Nie J, Fan K, Zheng Z, Wang J, Li J. Increased expression of Tim-3 and its ligand Galectin-9 in rat allografts during acute rejection episodes. Biochem Biophys Res Commun 2014; 445:542-8. [DOI: 10.1016/j.bbrc.2014.01.167] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 01/28/2014] [Indexed: 12/18/2022]
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Abstract
Since their discovery in 2001, the T-cell immunoglobulin mucin (TIM) family members have been shown to play important roles in the regulation of immune responses. The TIM family comprises of eight genes in the mouse, three of which are conserved in humans (TIM-1, TIM-3 and TIM-4). Initially, TIM-1 and TIM-3 were thought to be expressed solely on T cells. However, emerging data suggest a much broader expression pattern where their presence on APCs confers differing functions, including the ability to mediate phagocytosis. In contrast, TIM-4 is exclusively expressed on APCs. Together, the TIM molecules provide a functional repertoire for determining the fate of T-cell activation and differentiation. To date, much of the knowledge about the TIM family members has been garnered from the models of asthma, allergy and autoimmunity. More recently, data from experimental models of transplantation demonstrate that TIM family members also have a key role in alloimmunity. This review will serve to highlight the emerging data regarding this unique family of molecules and to identify their potential in transplantation tolerance.
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Affiliation(s)
- Melissa Y. Yeung
- Transplantation Research Center, Brigham and Women’s Hospital & Children’s Hospital, Harvard Medical School, Boston, MA
| | - Martina McGrath
- Transplantation Research Center, Brigham and Women’s Hospital & Children’s Hospital, Harvard Medical School, Boston, MA
| | - Nader Najafian
- Transplantation Research Center, Brigham and Women’s Hospital & Children’s Hospital, Harvard Medical School, Boston, MA,Address correspondence and reprint requests to: Nader Najafian, M.D., Transplantation Research Center, Brigham and Women’s Hospital & Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA, Phone: (617) 732-5259, FAX: (617) 732-5254,
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Ju Y, Hou N, Meng J, Wang X, Zhang X, Zhao D, Liu Y, Zhu F, Zhang L, Sun W, Liang X, Gao L, Ma C. T cell immunoglobulin- and mucin-domain-containing molecule-3 (Tim-3) mediates natural killer cell suppression in chronic hepatitis B. J Hepatol 2010; 52:322-9. [PMID: 20133006 DOI: 10.1016/j.jhep.2009.12.005] [Citation(s) in RCA: 184] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2009] [Revised: 08/30/2009] [Accepted: 09/09/2009] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS T cell immunoglobulin- and mucin-domain-containing molecule-3 (Tim-3) has been shown to influence autoimmune diseases; however, its function in viral infection has not been well-defined. We therefore investigated the expression and regulatory function of Tim-3 in natural killer (NK) cells in chronic Hepatitis B (CHB) infection. METHODS Seventy-six CHB patients, 38 healthy controls, and 18 patients with fatty liver disease (FLD) were tested for Tim-3 expression on peripheral blood mononuclear cells (PBMCs) and in the liver tissue by flow cytometry and immunohistochemical stainning. The effects of HBV infection on Tim-3 expression in NK cells and the roles of Tim-3 in regulation of NK-cell function were also studied. RESULTS There was a significant increase of Tim-3 expression in PBMCs, circulating NK cells and liver infiltrating lymphocytes (LILs) from CHB patients compared to that of healthy controls and FLD patients. Increased Tim-3 expression was also detected in NK92 cells that had been transfected with a HBV expression vector and NK cells isolated from the liver of HBV transgenic mice. Importantly, blockage of Tim-3 signaling with anti-Tim-3 antibodies or Tim-3-Fc fusion proteins resulted in an increased cytotoxicity for NK92 cells compared to HepG2 and HepG2.2.15 cells, as well as an elevated interferon-gamma (IFN-gamma) production. Similarly, enhanced cytotoxicity was also observed in PBMCs or NK cells from CHB patients treated with the Tim-3 blockade ex vivo. CONCLUSION HBV infection can up-regulate Tim-3 expression in NK cells, which may in turn suppress NK-cell functions in CHB patients.
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Affiliation(s)
- Ying Ju
- Institute of Immunology, Key Laboratory for Experimental Teratology of Ministry of Education, Shandong University School of Medicine, #44 Wenhua Xi Road, Jinan, Shandong, PR China
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Li JP, Zheng CL, Han ZC. Abnormal immunity and stem/progenitor cells in acquired aplastic anemia. Crit Rev Oncol Hematol 2009; 75:79-93. [PMID: 20045349 DOI: 10.1016/j.critrevonc.2009.12.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2009] [Revised: 11/28/2009] [Accepted: 12/09/2009] [Indexed: 10/20/2022] Open
Abstract
Acquired aplastic anemia (AA) is considered as an immune-mediated bone marrow failure syndrome, characterized by hypoplasia and pancytopenia with fatty bone marrow. Abnormal immunity is the major factor mediating the pathogenesis of acquired AA. Activated DCs might promote the polarization to Th1 cells, and activate CD8(+) T cells. A variety of immune molecules including IFN-gamma, TNF-alpha, MIP-1alpha and IL-2, 8, 12, 15, 17, 23, produced by them and stromal cells, compose a cytokine network to destruct stem/progenitor cells as well as hematopoietic stem/progenitor cells, mesenchymal stem cells (MSCs) and angioblasts/endothelial progenitor cells. Inversely, deficient MSCs, CD4(+)CD25(+) T cells, NK cells, NKT cells and early hematopoietic growth factors diminish the capacity of immune regulation and the support of hematopoiesis. As a result, stem/progenitor cells are significantly impaired to be disabled cells with markedly deficient proliferation, differentiation, induced apoptosis and dysfunctional response to growth factor stimuli, together with rare normal ones. Although some patients can be ameliorated by stem-cell transplantation or immunosuppressive therapy, more effective and convenient therapies such as patient-specific pluripotent iPS cells based on definite pathogenesis are expected.
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Affiliation(s)
- Jian Ping Li
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College, 288 Nanjing Road, Tianjin 300020, PR China
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