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Freeborn RA, Boss AP, Kaiser LM, Gardner EM, Rockwell CE. Trivalent arsenic impairs the effector response of human CD4+ and CD8+ T cells to influenza A virus ex vivo. Food Chem Toxicol 2022; 165:113122. [DOI: 10.1016/j.fct.2022.113122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 04/25/2022] [Accepted: 05/05/2022] [Indexed: 11/16/2022]
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An K, Xue MJ, Zhong JY, Yu SN, Lan TS, Qi ZQ, Xia JJ. Arsenic trioxide ameliorates experimental autoimmune encephalomyelitis in C57BL/6 mice by inducing CD4 + T cell apoptosis. J Neuroinflammation 2020; 17:147. [PMID: 32375831 PMCID: PMC7201567 DOI: 10.1186/s12974-020-01829-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 04/27/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Multiple sclerosis (MS) is an immune-mediated disease of the central nervous system characterized by severe white matter demyelination. Because of its complex pathogenesis, there is no definite cure for MS. Experimental autoimmune encephalomyelitis (EAE) is an ideal animal model for the study of MS. Arsenic trioxide (ATO) is an ancient Chinese medicine used for its therapeutic properties with several autoimmune diseases. It is also used to inhibit acute immune rejection due to its anti-inflammatory and immunosuppressive properties. However, it is unclear whether ATO has a therapeutic effect on EAE, and the underlying mechanisms have not yet been clearly elucidated. In this study, we attempted to assess whether ATO could be used to ameliorate EAE in mice. METHODS ATO (0.5 mg/kg/day) was administered intraperitoneally to EAE mice 10 days post-immunization for 8 days. On day 22 post-immunization, the spinal cord, spleen, and blood were collected to analyze demyelination, inflammation, microglia activation, and the proportion of CD4+ T cells. In vitro, for mechanistic studies, CD4+ T cells were sorted from the spleen of naïve C57BL/6 mice and treated with ATO and then used for an apoptosis assay, JC-1 staining, imaging under a transmission electron microscope, and western blotting. RESULTS ATO delayed the onset of EAE and alleviated the severity of EAE in mice. Treatment with ATO also attenuated demyelination, alleviated inflammation, reduced microglia activation, and decreased the expression levels of IL-2, IFN-γ, IL-1β, IL-6, and TNF-α in EAE mice. Moreover, the number and proportion of CD4+ T cells in the spinal cord, spleen, and peripheral blood were reduced in ATO-treated EAE mice. Finally, ATO induced CD4+ T cell apoptosis via the mitochondrial pathway both in vitro and in vivo. Additionally, the administration of ATO had no adverse effect on the heart, liver, or kidney function, nor did it induce apoptosis in the spinal cord. CONCLUSIONS Overall, our findings indicated that ATO plays a protective role in the initiation and progression of EAE and has the potential to be a novel drug in the treatment of MS.
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Affiliation(s)
- Ke An
- Organ Transplantation Institute of Xiamen University, Fujian Provincial Key Laboratory of Organ and Tissue Regeneration, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Meng-Jiao Xue
- Organ Transplantation Institute of Xiamen University, Fujian Provincial Key Laboratory of Organ and Tissue Regeneration, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Jia-Ying Zhong
- Organ Transplantation Institute of Xiamen University, Fujian Provincial Key Laboratory of Organ and Tissue Regeneration, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Sheng-Nan Yu
- Organ Transplantation Institute of Xiamen University, Fujian Provincial Key Laboratory of Organ and Tissue Regeneration, School of Medicine, Xiamen University, Xiamen, Fujian, China
- Department of Obstetrics and Gynecology, Zhongshan Hospital, Xiamen University, Xiamen, Fujian, China
| | - Tian-Shu Lan
- Key Laboratory of Functional and Clinical Translational Medicine, Fujian Province University, Xiamen Medical College, Xiamen, Fujian, China
| | - Zhong-Quan Qi
- School of Medicine, Guangxi University, Nanning, Guangxi, China.
| | - Jun-Jie Xia
- Organ Transplantation Institute of Xiamen University, Fujian Provincial Key Laboratory of Organ and Tissue Regeneration, School of Medicine, Xiamen University, Xiamen, Fujian, China.
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3
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Ye Y, Gaugler B, Mohty M, Malard F. Old dog, new trick: Trivalent arsenic as an immunomodulatory drug. Br J Pharmacol 2020; 177:2199-2214. [PMID: 32022256 DOI: 10.1111/bph.15011] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 09/19/2019] [Accepted: 01/28/2020] [Indexed: 12/19/2022] Open
Abstract
Trivalent arsenic (As(III)) is recently found to be an immunomodulatory agent. As(III) has therapeutic potential in several autoimmune and inflammatory diseases in vivo. In vitro, it selectively induces apoptosis of immune cells due to different sensitivity. At a non-toxic level, As(III) shows its multifaceted nature by inducing either pro- or anti-inflammatory functions of immune subsets. These effects are exerted by either As(III)-protein interactions or as a consequence of As(III)-induced homeostasis imbalance. The immunomodulatory properties also show synergistic effects of As(III) with cancer immunotherapy. In this review, we summarize the immunomodulatory effects of As(III), focusing on the effects of As(III) on immune subsets in vitro, on mouse models of immune-related diseases, and the role of As(III) in cancer immunotherapy. Updates of the mechanisms of action, the pioneer clinical trials, dosing, and adverse events of therapeutic As(III) are also provided.
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Affiliation(s)
- Yishan Ye
- Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine (CRSA), Paris, France.,Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Béatrice Gaugler
- Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine (CRSA), Paris, France.,AP-HP, Hôpital Saint-Antoine, Service d'Hématologie Clinique et Thérapie Cellulaire, Sorbonne Université, Paris, France
| | - Mohamad Mohty
- Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine (CRSA), Paris, France.,AP-HP, Hôpital Saint-Antoine, Service d'Hématologie Clinique et Thérapie Cellulaire, Sorbonne Université, Paris, France
| | - Florent Malard
- Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine (CRSA), Paris, France.,AP-HP, Hôpital Saint-Antoine, Service d'Hématologie Clinique et Thérapie Cellulaire, Sorbonne Université, Paris, France
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Dai J, Xu M, Zhang X, Niu Q, Hu Y, Li Y, Li S. Bi-directional regulation of TGF-β/Smad pathway by arsenic: A systemic review and meta-analysis of in vivo and in vitro studies. Life Sci 2019; 220:92-105. [PMID: 30703382 DOI: 10.1016/j.lfs.2019.01.042] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 01/18/2019] [Accepted: 01/25/2019] [Indexed: 01/30/2023]
Abstract
BACKGROUND Arsenic exposure can cause fibrosis of organs including the liver, heart and lung. It was reported that TGF-β/Smad pathway played a crucial role in the process of fibrosis. However, the mechanism of arsenic-induced fibrosis through TGF-β/Smad signaling pathway has remained controversial. OBJECTIVE A systematic review and meta-analysis was performed to clarify the relationship between arsenic and TGF-β/Smad pathway, providing a theoretical basis of fibrosis process caused by arsenic. METHODS A meta-analysis was used to reveal a correlation between arsenic and fibrosis markers of TGF-β/Smad pathway, including 47 articles of both in vivo and in vitro studies. (Standardized Mean Difference) SMD was employed to compare and analyze the combined effects. When I2 > was 50%, random effect model was selected and subgroup analysis was used to explore the source of heterogeneity. RESULTS Arsenic exposure up-regulated the expression of TGF-β1, p-Smad2/3, α-SMA, Collagen1/3 and FN. The dose-response relationship showed that low dose (≤5 μmol/L) arsenic exposure up-regulated the expression of TGF-β1, whereas high doses had a tendency to down-regulate that of TGF-β1. Subgroup analysis showed that low or short-term arsenic exposure induced the expression of TGF-β1 and fibrosis markers. CONCLUSION The results indicated that arsenic activates the TGF-β/Smad pathway and induced fibrosis. The mechanism is related to the up-regulation of NADPH oxidase and ROS accumulation. However, high-dose arsenic exposure may inhibit this pathway.
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Affiliation(s)
- Jingyuan Dai
- Department of Public Health, School of Medicine, Shihezi University, Shihezi 832000, Xinjiang, China
| | - Mengchuan Xu
- Department of Public Health, School of Medicine, Shihezi University, Shihezi 832000, Xinjiang, China
| | - Xiaoran Zhang
- Department of Public Health, School of Medicine, Shihezi University, Shihezi 832000, Xinjiang, China
| | - Qiang Niu
- Department of Public Health, School of Medicine, Shihezi University, Shihezi 832000, Xinjiang, China
| | - Yunhua Hu
- Department of Public Health, School of Medicine, Shihezi University, Shihezi 832000, Xinjiang, China
| | - Yu Li
- Department of Public Health, School of Medicine, Shihezi University, Shihezi 832000, Xinjiang, China
| | - Shugang Li
- Department of Public Health, School of Medicine, Shihezi University, Shihezi 832000, Xinjiang, China.
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5
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Rap1 deficiency-provoked paracrine dysfunction impairs immunosuppressive potency of mesenchymal stem cells in allograft rejection of heart transplantation. Cell Death Dis 2018. [PMID: 29515165 PMCID: PMC5842217 DOI: 10.1038/s41419-018-0414-3] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Immunomodulatory activity of mesenchymal stem cells (MSCs) is largely mediated by paracrine factors. Our previous studies showed that activation of nuclear factor-kappa B (NF-κB) regulates cytokine/growth factor secretion by MSCs. This study aimed to elucidate the role of Rap1 (repressor/activator protein), a novel modulator involved in the NF-κB pathway, in regulating the immunomodulatory potency of MSCs in acute allograft rejection of heart transplantation. The immunosuppressive potency of wild-type MSCs (WT-MSCs) or Rap1-deficient MSCs (Rap1−/−-MSCs) was examined in mice with acute allograft rejection following heart transplantation. With a combination of immunosuppressant rapamycin at a dose of 1 mg/kg/d, WT-MSCs notably prolonged the survival of the transplanted heart compared with Rap1−/−-MSCs. Rap1−/−-MSCs displayed a marked insensitivity to inhibit the mixed lymphocyte reaction (MLR) due to impaired cytokine production and a significantly reduced activity of NF-κB signaling in vitro. Finally, transplantation of encapsulated WT-MSCs greatly prolonged the survival of the heart allograft compared with encapsulated Rap1−/−-MSCs. Our results indicate that Rap1 is essential to maintain the immunomodulatory function of MSCs. Deletion of Rap1 results in impaired immunomodulatory function of MSCs.
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6
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Qiu S, Lv D. Triptolide inhibits CD4 + memory T cell-mediated acute rejection and prolongs cardiac allograft survival in mice. Exp Ther Med 2017; 14:2817-2822. [PMID: 28912844 PMCID: PMC5585726 DOI: 10.3892/etm.2017.4867] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 04/07/2017] [Indexed: 12/11/2022] Open
Abstract
There have been numerous investigations into the immunosuppressive effects of triptolide; however, its inhibitory effects on memory T cells remain to be elucidated. Using a cluster of differentiation (CD)4+ memory T-cell transfer model, the aim of the present study was to determine the inhibitory effects of triptolide on CD4+ memory T cell-mediated acute rejection and to determine the potential underlying mechanisms. At 4 weeks after skin transplantation, mouse cervical heart transplantation was performed following the transfer of CD4+ memory T cells. Mice were divided into two groups: A Control [normal saline, 30 ml/kg/day; intraperitoneal injection (ip)] and a triptolide group (triptolide, 3 mg/kg/day; ip). Graft survival, pathological examination and the corresponding International Society for Heart & Lung Transplantation (ISHLT) scores were assessed 5 days following heart transplantation, and levels of interleukin (IL)-2, interferon-γ (IFN-γ), IL-10 and transforming growth factor β1 (TGF-β1) in cardiac grafts and peripheral blood were assessed using reverse transcription-quantitative polymerase chain reaction and ELISA. The duration of cardiac graft survival in the triptolide group was significantly increased compared with the control group (14.3±0.4 vs. 5.3±0.2 days; P<0.001). Further pathological examinations revealed that the infiltration of inflammatory cells and myocardial damage in the cardiac grafts was notably reduced by triptolide, and the corresponding ISHLT scores in the triptolide group were significantly lower than those of the control group (grade 2.08±0.15 vs. 3.67±0.17; P<0.001). In addition, triptolide was able to significantly reduce IL-2 and IFN-γ secretion (P<0.01), significantly increase TGF-β1 secretion in the cardiac grafts and peripheral blood (P<0.01) and increase IL-10 secretion in the cardiac grafts. Therefore, the present study suggests that triptolide inhibits CD4+ memory T cell-mediated acute rejection and prolongs cardiac allograft survival in mice. This effect may be mediated by the inhibition of cytokine secretion by type 1 T helper cells and promotion of regulatory T cell proliferation.
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Affiliation(s)
- Shuiwei Qiu
- Department of Cardiothoracic Surgery, People's Hospital of Quzhou, Quzhou, Zhejiang 324000, P.R. China
| | - Dingliang Lv
- Department of Cardiothoracic Surgery, People's Hospital of Quzhou, Quzhou, Zhejiang 324000, P.R. China
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7
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Dai C, Lu FN, Jin N, Yang B, Gao C, Zhao B, Fu JZ, Hong SF, Liang HT, Chen LH, Chen ZS, Chen J, Qi ZQ. Recombinant IL-33 prolongs leflunomide-mediated graft survival by reducing IFN-γ and expanding CD4(+)Foxp3(+) T cells in concordant heart transplantation. J Transl Med 2016; 96:820-9. [PMID: 27295346 DOI: 10.1038/labinvest.2016.54] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 03/13/2016] [Accepted: 03/29/2016] [Indexed: 11/09/2022] Open
Abstract
Interleukin (IL)-33 is a novel IL-1 family member, and its administration has been associated with promotion of T helper type-2 (Th2) cell activity and cytokines, particularly IL-4 and IL-5 in vivo. Recently, IL-33 was shown to increase CD4(+)Foxp3(+) regulatory T cells (Tregs) and to suppress levels of the Th1-type cytokine IFN-γ in allogeneic heart transplantation in mice. Therefore, we hypothesized that IL-33 and leflunomide (Lef) could prolong graft survival in the concordant mouse-to-rat heart transplantation model. In this model, xenografts undergo acute humoral xenograft rejection (AHXR) typically on day 3 or cell-mediated rejection approximately on day 7 if AHXR is inhibited by Lef treatment. Recipients were treated with Lef (n=6), IL-33 (n=6), IL-33 combined with Lef (n=6), or left untreated (n=6) for survival studies. Heart grafts were monitored until they stopped beating. Mouse heterotopic grafts were performed, and recipients were sacrificed on days 2 and 7 for histological and flow cytometric analyses. The combination of IL-33 and Lef significantly prolonged the grafts from 17.3±2.3 to 2.8±0.4 days, compared to untreated controls. IL-33 administration with Lef, while facilitating Th2-associated cytokines (IL-4 on day 2 but not day 7), also decreased IFN-γ on day 2 and day 7, compared with Lef treatment only. Furthermore, IL-33 with Lef administration caused an expansion of suppressive CD4(+)Foxp3(+) Tregs in rats. The IL-33 and Lef combination therapy resulted in significantly prolonged graft survival, associated with markedly decreased Th1 cells and increased IL-10 levels. In addition, the combination therapy significantly decreased the percentage of CD-45(+) B cells on days 2 and 7, compared with monotherapy. These findings reveal a new immunoregulatory property of IL-33. Specifically, it facilitates regulatory cells, particularly functional CD4(+)Foxp3(+) Tregs that underlie IL-33-mediated cardiac xenograft survival. Moreover, it can decrease Th1 cells and cytokine expression of Th1 T cells in xenograft recipients, for example IFN-γ.
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Affiliation(s)
- Chen Dai
- Institute of Organ Transplantation, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation of the Ministry of Education, Wuhan, Hubei, PR China.,Key Laboratory of Organ Transplantation of the Ministry of Health, Wuhan, Hubei, PR China
| | - Fang-Na Lu
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian, PR China
| | - Ning Jin
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian, PR China
| | - Bo Yang
- Institute of Organ Transplantation, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation of the Ministry of Education, Wuhan, Hubei, PR China.,Key Laboratory of Organ Transplantation of the Ministry of Health, Wuhan, Hubei, PR China
| | - Chang Gao
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian, PR China
| | - Bin Zhao
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian, PR China
| | - Jia-Zhao Fu
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian, PR China
| | - Shi-Fu Hong
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian, PR China
| | - Han-Ting Liang
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian, PR China
| | - Li-Hong Chen
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian, PR China
| | - Zhi-Shui Chen
- Institute of Organ Transplantation, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation of the Ministry of Education, Wuhan, Hubei, PR China.,Key Laboratory of Organ Transplantation of the Ministry of Health, Wuhan, Hubei, PR China
| | - Jie Chen
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian, PR China
| | - Zhong-Quan Qi
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian, PR China
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Jiao ZX, Leng Y, Xia JJ, Wu HQ, Jin N, Fu JZ, Cheng LN, Wang JH, Ni SB, Qi ZQ. As2O3combined with leflunomide prolongs heart xenograft survival via suppressing the response of Th1, Th2, and B cells in a rat model. Xenotransplantation 2016; 23:237-48. [PMID: 27188662 DOI: 10.1111/xen.12238] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 04/11/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Zhi-Xing Jiao
- The Second Department of Urinary Surgery; The First Affiliated Hospital of Harbin Medical University; Harbin City Heilongjiang Province China
| | - Yun Leng
- Organ Transplantation Institute; Medical College; Xiamen University; Xiamen City Fujian Province China
| | - Jun-Jie Xia
- Organ Transplantation Institute; Medical College; Xiamen University; Xiamen City Fujian Province China
| | - Hai-Qiao Wu
- Chenggong Hospital and College of Chemistry and Chemical Engineering; Xiamen University; Xiamen City Fujian Province China
| | - Ning Jin
- Organ Transplantation Institute; Medical College; Xiamen University; Xiamen City Fujian Province China
| | - Jia-Zhao Fu
- Organ Transplantation Institute; Medical College; Xiamen University; Xiamen City Fujian Province China
| | - Lian-Na Cheng
- Organ Transplantation Institute; Medical College; Xiamen University; Xiamen City Fujian Province China
| | - Jin-Hua Wang
- Department of Pharmacy Intravenous Admixture Service; The First Affiliated Hospital of Harbin Medical University; Harbin City Heilongjiang Province China
| | - Shao-Bin Ni
- The Second Department of Urinary Surgery; The First Affiliated Hospital of Harbin Medical University; Harbin City Heilongjiang Province China
| | - Zhong-Quan Qi
- The Second Department of Urinary Surgery; The First Affiliated Hospital of Harbin Medical University; Harbin City Heilongjiang Province China
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9
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Arsenic Trioxide Induces T Cell Apoptosis and Prolongs Islet Allograft Survival in Mice. Transplantation 2015; 99:1796-806. [PMID: 25919768 DOI: 10.1097/tp.0000000000000735] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND T cell-mediated immune rejection is a key barrier to islet transplantation. Preliminary studies have shown that arsenic trioxide (As2O3) can inhibit T cell responses and prolong heart allograft survival. Here, we sought to investigate the possibility of using As2O3 to prolong islet allograft survival in an acute rejection model of Balb/c to C57B/6 mice. METHODS Recipient mice were treated with As2O3 and/or rapamycin after islet allograft transplantation. At day 10 after transplantation, the graft, spleen, lymph nodes, and blood of the recipient mice were recovered for analysis. In vitro, to further examine the mechanism underlying As2O3 protection of islet allografts against T cell-mediated rejection, mixed lymphocyte reaction and apoptosis analyses of T cells were performed. The phosphorylation levels of IκBα and p38 were also evaluated to confirm the proliferation and apoptosis of As2O3-treated T cells. RESULTS We found that As2O3 prolonged islet allograft survival by reducing inflammatory reactions, influencing cytokine synthesis and secretion and T-cell subset proportions, and inhibiting T-cell responses. Furthermore, As2O3 and rapamycin showed a synergistic effect in suppressing islet allotransplant rejection. CONCLUSIONS Arsenic trioxide may prevent allograft rejection by inhibiting T-cell proliferation and inducing T-cell apoptosis.
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10
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Arsenic trioxide inhibits accelerated allograft rejection mediated by alloreactive CD8(+) memory T cells and prolongs allograft survival time. Transpl Immunol 2015; 33:30-6. [PMID: 26044521 DOI: 10.1016/j.trim.2015.05.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 04/28/2015] [Accepted: 05/26/2015] [Indexed: 11/20/2022]
Abstract
CD8(+) memory T (Tm) cells are a significant barrier to transplant tolerance induction in alloantigen-primed recipients, and are insensitive to existing clinical immunosuppressants. Here, we studied the inhibition of CD8(+) Tm cells by arsenic trioxide (As2O3) for the first time. Alloantigen-primed CD8(+) Tm cells were transferred to T cell immunodeficient nude mice. The mice were subjected to heart allotransplantation, and treated with As2O3. The transplant survival time was determined, and the inhibitory effects of As2O3 on CD8(+) Tm cell-mediated immune rejection were assessed through serological studies and inspection of the transplanted heart and lymphoid organs. We found that As2O3 treatment prolonged the mean survival time of the graft and reduced the number of CD8(+) Tm cells in the spleen and lymph nodes. The expression of the genes encoding interleukin (IL)-2, and IFN-γ was reduced, while expression of IL-10 and transforming growth factor-β was increased in the transplant. Our findings show that As2O3 treatment inhibits allograft rejection mediated by alloreactive CD8(+) Tm cells in the mouse heart transplantation model.
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11
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Overexpression of Jagged-1 combined with blockade of CD40 pathway prolongs allograft survival. Immunol Cell Biol 2014; 93:213-7. [PMID: 25287443 DOI: 10.1038/icb.2014.84] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 08/25/2014] [Accepted: 09/03/2014] [Indexed: 02/06/2023]
Abstract
Dendritic cells (DCs) have the tolerogenic potential to regulate adaptive immunity and induce allografts acceptance. Here we investigated whether blockade of the CD40 pathway could enhance the immune tolerance induced by DC2.4 cells modified to express Jagged-1 (JAG1-DC) in heart transplantation. Results showed that JAG1-DC treatment combined with anti-CD40L monoclonal antibody (mAb) administration significantly prolonged cardiac allograft survival in mice, with long-term survival (>110 days) of 50% of the allografts in the recipients. The therapy specifically inhibited the immune response, induced alloantigen-specific T-cell hyporesponsiveness, upregulated transforming growth factor-β synthesis and increased the population of regulatory T cells (Tregs) driven by Jagged-1-Notch activation. These results highlight the potential application of gene therapy to induce alloantigen-specific Tregs effectively by providing the Jagged-1 stimulation.
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12
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Ma PF, Jiang J, Gao C, Cheng PP, Li JL, Huang X, Lin YY, Li Q, Peng YZ, Cai MC, Shao W, Zhu Q, Han S, Qin Q, Xia JJ, Qi ZQ. Immunosuppressive effect of compound K on islet transplantation in an STZ-induced diabetic mouse model. Diabetes 2014; 63:3458-69. [PMID: 24834979 DOI: 10.2337/db14-0012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Islet transplantation is a therapeutic option for type 1 diabetes, but its long-term success is limited by islet allograft survival. Many factors imperil islet survival, especially the adverse effects and toxicity due to clinical immunosuppressants. Compound (Cpd) K is a synthesized analog of highly unsaturated fatty acids from Isatis tinctoria L. (Cruciferae). Here we investigated the therapeutic effect of Cpd K in diabetic mice and found that it significantly prolonged islet allograft survival with minimal adverse effects after 10 days. Furthermore, it reduced the proportion of CD4(+) and CD8(+) T cells in spleen and lymph nodes, inhibited inflammatory cell infiltration in allografts, suppressed serum interleukin-2 and interferon-γ secretion, and increased transforming growth factor-β and Foxp3 mRNA expression. Surprisingly, Cpd K and rapamycin had a synergistic effect. Cpd K suppressed proliferation of naïve T cells by inducing T-cell anergy and promoting the generation of regulatory T cells. In addition, nuclear factor-κB signaling was also blocked. Taken together, these findings indicate that Cpd K may have a potential immunosuppressant effect on islet transplantation.
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Affiliation(s)
- Peng-Fei Ma
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen City, Fujian Province, PR China
| | - Jie Jiang
- Department of Thoracic Surgery, The First Affiliated Hospital of Xiamen University, Xiamen City, Fujian Province, PR China
| | - Chang Gao
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen City, Fujian Province, PR China
| | - Pan-Pan Cheng
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen City, Fujian Province, PR China
| | - Jia-Li Li
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen City, Fujian Province, PR China
| | - Xin Huang
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen City, Fujian Province, PR China
| | - Ying-Ying Lin
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen City, Fujian Province, PR China
| | - Qing Li
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen City, Fujian Province, PR China
| | - Yuan-Zheng Peng
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen City, Fujian Province, PR China
| | - Mei-Chun Cai
- State Key Laboratory of Stress Cell Biology, School of Life Sciences, Xiamen University, Xiamen City, Fujian Province, PR China
| | - Wei Shao
- Department of Pathology, The Affiliated Chenggong Hospital of Xiamen University, Xiamen City, Fujian Province, PR China
| | - Qi Zhu
- Department of Hepatobiliary Internal Medicine Clinic, The Affiliated Fuzhou Second Hospital of Xiamen University, Fuzhou City, Fujian Province, PR China
| | - Sai Han
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen City, Fujian Province, PR China
| | - Qing Qin
- School of Pharmaceutical Sciences, Guangxi Medical University, Nanning City, Guangxi Province, PR China
| | - Jun-Jie Xia
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen City, Fujian Province, PR China
| | - Zhong-Quan Qi
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen City, Fujian Province, PR China
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Yan G, Xi Y, Xu S, Lin Y, Chen J, Dai H, Xia J, Li C, Li Q, Li Z, Qi Z. Inhibition of accelerated rejection mediated by alloreactive CD4⁺ memory T cells and prolonged allograft survival by arsenic trioxide. Immunol Invest 2014; 42:438-54. [PMID: 23802174 DOI: 10.3109/08820139.2013.801986] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The aim of this study was to evaluate and determine the potential mechanisms of As₂O₃ in accelerated rejection mediated by alloreactive CD4⁺ memory T cells. Vascularized heterotopic cardiac transplantation from C57BL/6 mice to nude mice (pre-transferred CD4⁺ memory T cells) was performed on Day 0, and As₂O₃ was administered to recipient mice from Day 0 to 10. As a result, As₂O₃ could reduce the proliferation of allo-primed CD4⁺ memory T cells in vitro in MLR and the baseline rate of proliferation was restored by the addition of exogenous IL-2. In vivo, compared with the control[+] group, the mean survival time of cardiac allografts in the As₂O₃ group was prolonged from 5.8 ± 0.7 to 14.2 ± 2.5 days. Five days after transplantation, the relative gene expression of IL-2, IFN-γ and Foxp3 was reduced in the grafts by As₂O₃ treatment, but the expression of IL-10 and TGF-β was increased. Correspondingly, the proportions of CD4⁺ T cells, CD4⁺ memory T cells and regulatory T cells (Tregs), both in recipient spleens and lymph nodes, were lowered. These results indicate the potential of As2O3 as a novel immunosuppressant targeting CD4⁺ memory T cells.
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Affiliation(s)
- Guoliang Yan
- Basic Medical Department of Medical College, Xiamen University, Xiamen City, Fujian Province, P. R. China
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Li K, Zhang L, Xiang X, Gong S, Ma L, Xu L, Wang G, Liu Y, Ji X, Liu S, Chen P, Zeng H, Li J. Arsenic trioxide alleviates airway hyperresponsiveness and promotes apoptosis of CD4+ T lymphocytes: evidence for involvement of the ER stress-CHOP pathway. Ir J Med Sci 2013; 182:573-83. [PMID: 23494705 DOI: 10.1007/s11845-013-0928-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 02/15/2013] [Indexed: 11/29/2022]
Abstract
BACKGROUND Asthma is a chronic inflammatory disorder of the airway. Arsenic trioxide (ATO) is an ancient Chinese medicine, which is used to treat psoriasis, asthma, and acute promyelocytic leukemia. AIM We wanted to research the effect of arsenic trioxide on asthma. METHODS Using a murine model of asthma, the airway hyperresponsiveness was conducted by the Buxco pulmonary function apparatus. Total cell counts of BALF were counted with a counting chamber. Histopathological analysis of lung tissues was conducted by hematoxylin-eosin or periodic acid-schiff stain. CD4+T cells were purified from the spleen by positive selection, using immunomagnetic beads. Apoptosis measurements were done with Annexin-V/PI staining. Western blot analysis and real time-PCR were performed to assess the expression of C/EBP-homologous protein (CHOP) and glucose-regulated protein 78 (GRP78), respectively. RNA interference was conducted to inhibit the expression of CHOP. RESULTS We found that arsenic trioxide treatment alleviated airway hyperresponsiveness and reduced inflammation of the lung in asthmatic mice. Furthermore, arsenic trioxide treatment promoted apoptosis of CD4+T cells in vivo and in vitro. When CD4+T cells were cultured with arsenic trioxide for 5 h at a concentration of 5 μM, the expression of GRP78 and CHOP was increased. Treatment of CD4+T cells with CHOP siRNA, provided partial resistance to arsenic trioxide-induced apoptosis of CD4+T cells CONCLUSIONS These data demonstrated that arsenic trioxide can reduce the severity of asthma attacks and induce the apoptosis of CD4+ T cell which the ER stress-CHOP pathway involved.
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Affiliation(s)
- K Li
- Department of Respiratory Medicine, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
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