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Li L, Chen J, Wang Z, Xu Y, Yao H, Lei W, Zhou X, Zheng M. NECA alleviates inflammatory responses in diabetic retinopathy through dendritic cell toll-like receptor signaling pathway. Front Immunol 2024; 15:1415004. [PMID: 38895119 PMCID: PMC11182989 DOI: 10.3389/fimmu.2024.1415004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Accepted: 05/16/2024] [Indexed: 06/21/2024] Open
Abstract
Introduction This study examined the impact of 5'-(N- ethylcarboxamido)adenosine (NECA) in the peripheral blood of healthy individuals, those with diabetes mellitus, diabetic retinopathy (DR), and C57BL/6 mice, both in vivo and in vitro. Methods Enzyme-linked immunosorbent assay (ELISA) and flow cytometry (FCM) were used to evaluate the effects of NECA on dendritic cells (DCs) and mouse bone marrow-derived dendritic cells (BMDCs) and the effects of NECA-treated DCs on Treg and Th17 cells. The effect of NECA on the Toll-like receptor (TLR) pathway in DCs was evaluated using polymerase chain reaction (PCR) and western blotting (WB). Results FCM and ELISA showed that NECA inhibited the expression of surface markers of DCs and BMDCs, increased anti-inflammatory cytokines and decreased proinflammatory cytokines. PCR and WB showed that NCEA decreased mRNA transcription and protein expression in the TLR-4-MyD88-NF-kβ pathway in DCs and BMDCs. The DR severity in streptozocin (STZ) induced diabetic mice was alleviated. NECA-treated DCs and BMDCs were co-cultivated with CD4+T cells, resulting in modulation of Treg and Th17 differentiation, along with cytokine secretion alterations. Conclusion NECA could impair DCs' ability to present antigens and mitigate the inflammatory response, thereby alleviating the severity of DR.
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Affiliation(s)
| | | | | | | | | | | | - Xiyuan Zhou
- *Correspondence: Xiyuan Zhou, ; Minming Zheng,
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Wang X, Wang P. Effect of a protein kinase B (Akt) inhibitor on the angiogenesis of HUVECs and corneal neovascularization. Wien Klin Wochenschr 2024; 136:154-162. [PMID: 37261487 DOI: 10.1007/s00508-023-02208-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 04/11/2023] [Indexed: 06/02/2023]
Abstract
BACKGROUND Corneal neovascularization (CNV) is a vision-threatening disease and an increasing public health concern. It was found that administering an Akt inhibitor in the second phase of retinopathy significantly decreased retinal neovascularization. METHODS This study investigated the effect of an Akt inhibitor on the angiogenesis of human umbilical vein endothelial cells (HUVECs) and its impacts on the degree of CNV and corneal opacity in a rat keratoplasty model. Cell Counting Kit-8 (CCK-8) and 5-ethynyl-2'-deoxyuridine (EdU) assays, tube formation assays, cell scratch experiments, and a fully allogeneic corneal transplant model were performed. RESULTS It was found that an Akt inhibitor inhibited the proliferation, angiogenesis, and migration of HUVECs induced by vascular endothelial growth factor (VEGF). The results showed that both CNV and corneal opacity were decreased in rats after Akt inhibitor administration. CONCLUSION The research illustrates the vital role of Akt inhibitors in mediating CNV. The analysis shows that the Akt inhibitor may provide a novel and feasible therapeutic approach to prevent CNV, but its mechanism needs further investigation.
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Affiliation(s)
- Xing Wang
- Chongqing Key Laboratory of Ophthalmology and Chongqing Eye Institute, The First Affiliated Hospital of Chongqing Medical University, No. 1, Youyi Road, Yuanjiagang, Yuzhong District, 400016, Chongqing, China
| | - Peng Wang
- Chongqing Key Laboratory of Ophthalmology and Chongqing Eye Institute, The First Affiliated Hospital of Chongqing Medical University, No. 1, Youyi Road, Yuanjiagang, Yuzhong District, 400016, Chongqing, China.
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Dong M, Wang X, Li T, Jing Y, Liu Y, Zhao H. miR-27a-3p alleviates lung transplantation-induced bronchiolitis obliterans syndrome (BOS) via suppressing Smad-mediated myofibroblast differentiation and TLR4-induced dendritic cells maturation. Transpl Immunol 2023; 78:101806. [PMID: 36925075 DOI: 10.1016/j.trim.2023.101806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 02/03/2023] [Accepted: 02/21/2023] [Indexed: 03/17/2023]
Abstract
BACKGROUND Bronchiolitis obliterans syndrome (BOS), induced by a chronic rejection, remains a significant obstacle for end-stage lung diseases after lung transplantation. We have previously determined that the small non-coding mRNA (miRNA) miR-27a-3p maintained the immature state of dendritic cells (DCs) via the interleukin 10 (IL-10)-dependent regulatory pathway. Such status helped in preventing rejection and alleviating BOS. The present study explored mechanisms how miR-27a-3p may suppress the fibrosis as well as the maturation of DCs, ultimately attenuating BOS in vitro and in vivo. METHODS/RESULTS In our tracheal transplantation mouse model, the expression of Smad2, Smad4, and αSMA were significantly decreased in the miR-27a-3p-transfected DCs (p < 0.0001, p = 0.0006, and p = 0.0002 respectively). Moreover, the expression of fibrosis markers (α-SMA, collagen I, and Fn) were potently inhibited in the miR-27a-3p-transfected NIH-3 T3 cells (p < 0.0001, p = 0.00148, and p < 0.0001 respectively). At the same time, reversed results were observed in the inhibitor group (p = 0.0002, p < 0.0001, and p < 0.0001 respectively), indicating that miR-27a-3p could directly inhibit myofibroblast differentiation. Furthermore, in the tracheal transplanted mice, the population of Treg cells was significantly decreased (p < 0.0001). In contrast, Th17 cells were down-regulated in the miR-27a-3p-transfected DCs group (p < 0.0001), accompanied by the decreased IL-17 levels (p = 0.0007) and the induction of TGF-β1 and IL-10 (p < 0.0001 and p = 0.0016 respectively). Further mechanistic studies indicated that miR-27a-3p altered the maturation of DCs by targeting TLR4 and IRAK (p < 0.0001 and p = 0.0002 respectively). CONCLUSIONS Our study suggests that miR-27a-3p selectively blocked the TGF-β1/Smad pathways to suppress the myofibroblast differentiation and targeted the TRL4/IRAK4 pathway to restrain DCs maturation, thus attenuating BOS. Our findings suggest that miR-27a-3p is a potential active molecule on BOS management after lung transplantation.
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Affiliation(s)
- Ming Dong
- Department of Lung Cancer Surgery, Tianjin Medical University General Hospital; Anshan Road No.154, Heping District, Tianjin 300052, China.
| | - Xin Wang
- Department of Pediatric Surgery, Tianjin Children's Hospital, No.238 LongYan Road, Tianjin 300134, China
| | - Tong Li
- Department of Lung Cancer Surgery, Tianjin Medical University General Hospital; Anshan Road No.154, Heping District, Tianjin 300052, China
| | - Yaqing Jing
- Department of Genetics, School of Basic Medical Sciences, Tianjin Medical University, Qixiangtai Road, No.22, Heping District, Tianjin 300070, China
| | - Yi Liu
- Department of Genetics, School of Basic Medical Sciences, Tianjin Medical University, Qixiangtai Road, No.22, Heping District, Tianjin 300070, China
| | - Honglin Zhao
- Department of Lung Cancer Surgery, Tianjin Medical University General Hospital; Anshan Road No.154, Heping District, Tianjin 300052, China
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Liu R, Yi R, Chen X, Yi G, Fu M. Lentivirus-mediated PD-L1 overexpression in bone marrow-derived dendritic cells induces immune tolerance in a rat keratoplasty model. Transpl Immunol 2022; 74:101654. [PMID: 35777615 DOI: 10.1016/j.trim.2022.101654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 05/31/2022] [Accepted: 06/22/2022] [Indexed: 10/17/2022]
Abstract
PURPOSE The side effects of immune suppressants on immune rejection have become increasingly apparent after keratoplasty. To find out new alternative immunotherapy strategies, we studied the role of programmed death-1 (PD-1) and its ligand (PD-L1) co-stimulatory pathway in inducing immune tolerance of rat keratoplasty. METHODS The PD-L1 protein was constitutively overexpressed via lentiviral transduction in bone marrow-derived dendritic cells (BMDCs) from rats, then infused via the tail vein into rats before undergoing keratoplasty. Western blot analysis of PD-L1 protein confirmed the effectiveness of lentivirus-mediated. The phenotype of immature BMDC was confirmed by flow cytometry analysis with CD80, CD86, CD11c and MHC-II antibodies. To investigate the mechanism of the immune tolerance induced by BMDCs transfusion, PD-L1, IFN-γ and IL-17 in serum and cell culture supernatant were assessed by ELISA and qPCR. RESULTS After LPS stimulation, immature dendritic cells with over-expression of PD-L1 still showed high expression of PD-L1(p < 0.001), and low expression of IL-17 and IFN-γ (p < 0.001), which reduced neovascularization (p < 0.05), and prolonged the survival after corneal implants. CONCLUSION Immature DC cells with overexpression of PD-L1 have low ability to activate T cells,which is a potential treatment for avoiding graft rejection by promoting natural immunosuppression. This cellular treatment is expected to reduce the use of immune suppressants and the occurrence of side effects.
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Affiliation(s)
- Rubing Liu
- Zhujiang Hospital, Southern Medical University, Guangzhou, China; The Second Clinical School, Southern Medical University, Guangzhou, China
| | - Ruiwen Yi
- Department of Ophthalmology, Maoming People's Hospital, Maoming, China
| | - Xinglu Chen
- Clinical Laboratory, 1st Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, China
| | - Guoguo Yi
- Department of Ophthalmology, The Sixth Affiliated Hospital of Sun Yat Sen University, Guangzhou, China.
| | - Min Fu
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou, China.
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Yu Y, Liu B, Chen S, Wang J, Chen F, Liu T, Jiang N, Chen W, Weng S, Cai X, Xiang D. Trichostatin A inhibits dendritic cell maturation through down-regulating NF-κ B (p65) pathway. Mol Biol Rep 2022; 49:2619-2627. [PMID: 35028853 DOI: 10.1007/s11033-021-07065-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 12/08/2021] [Indexed: 12/31/2022]
Abstract
BACKGROUND Recent evidence suggested that histone deacetylase inhibitor (HDACi) could inhibit dendritic cell (DC) maturation. However, the mechanism is unclear. Here, we aimed to study whether Trichostatin A (TSA), the most widely studied HDACi, inhibits the maturation of DCs by down-regulating NF-κB (p65) pathway. METHODS AND RESULTS Mouse bone marrow-derived DCs were cultured. Lipopolysaccharide (LPS) was applied as stimulation for maturation. Triptolide (TTL) was applied as p65 inhibitor. Microphotography and flow cytometry showed that TSA and p65 inhibitor separately inhibited the maturation of DCs stimulated by LPS from the aspects of cell morphology and cell phenotype. Mixed lymphocyte reaction test and ELISA showed that TSA and p65 inhibitor synergistically inhibited the proliferation of T lymphocytes stimulated by DCs, reduced the secretion of pro-inflammatory cytokine IL-12 and elevated the secretion of anti-inflammatory cytokine IL-10. Western blot and RT-qPCR showed that TSA down-regulated the expression of phosphorylated IκBα, phosphorylated-p65, Ikkβ and Ikkγ, suggesting TSA down-regulates NF-κB (p65) pathway. CONCLUSIONS TSA inhibits DC maturation through down-regulating NF-κB (p65) pathway.
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Affiliation(s)
- Ying Yu
- Department of Ophthalmology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, No.9 Jinsui Road, Guangzhou, 510623, China
| | - Bing Liu
- Department of Ophthalmology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, No.9 Jinsui Road, Guangzhou, 510623, China
| | - Siyan Chen
- Department of Ophthalmology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, No.9 Jinsui Road, Guangzhou, 510623, China
| | - Jianxun Wang
- Department of Ophthalmology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, No.9 Jinsui Road, Guangzhou, 510623, China
| | - Feng Chen
- Department of Ophthalmology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, No.9 Jinsui Road, Guangzhou, 510623, China
| | - Tian Liu
- Department of Ophthalmology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, No.9 Jinsui Road, Guangzhou, 510623, China
| | - Nan Jiang
- Department of Ophthalmology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, No.9 Jinsui Road, Guangzhou, 510623, China
| | - Wensi Chen
- Department of Ophthalmology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, No.9 Jinsui Road, Guangzhou, 510623, China
| | - Shengbei Weng
- Department of Ophthalmology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, No.9 Jinsui Road, Guangzhou, 510623, China
| | - Xiaoxiao Cai
- Department of Ophthalmology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, No.9 Jinsui Road, Guangzhou, 510623, China
| | - Daoman Xiang
- Department of Ophthalmology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, No.9 Jinsui Road, Guangzhou, 510623, China.
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Abstract
As a transparent avascular tissue located at the front of the eyeball, the cornea is an important barrier to external damage. Both epithelial and endothelial cells of the cornea harbor primary cilia, which sense changes in the external environment and regulate intracellular signaling pathways. Accumulating evidence suggests that the primary cilium regulates corneal development in several ways, including participation in corneal epithelial stratification and maintenance of corneal endothelial cell morphology. In addition, the primary cilium has been implicated in the pathogenesis of several corneal diseases. In this review, we discuss recent findings that demonstrate the critical role of the primary cilium in corneal development. We also discuss the link between ciliary dysfunction and corneal diseases, which suggests that the primary cilium could be targeted to treat these diseases.
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Affiliation(s)
- Ting Song
- Institute of Biomedical Sciences, Shandong Provincial Key Laboratory of Animal Resistance Biology, Collaborative Innovation Center of Cell Biology in Universities of Shandong, College of Life Sciences, Shandong Normal University, Jinan, Shandong 250014, China
| | - Jun Zhou
- Institute of Biomedical Sciences, Shandong Provincial Key Laboratory of Animal Resistance Biology, Collaborative Innovation Center of Cell Biology in Universities of Shandong, College of Life Sciences, Shandong Normal University, Jinan, Shandong 250014, China.,State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin 300071, China. E-mail:
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Huang X, Yi S, Hu J, Du Z, Wang Q, Ye Z, Su G, Kijlstra A, Yang P. Linoleic acid inhibits in vitro function of human and murine dendritic cells, CD4 +T cells and retinal pigment epithelial cells. Graefes Arch Clin Exp Ophthalmol 2020; 259:987-998. [PMID: 33079282 DOI: 10.1007/s00417-020-04972-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 09/29/2020] [Accepted: 10/07/2020] [Indexed: 02/07/2023] Open
Abstract
PURPOSE Increased linoleic acid (LA) was observed in acute anterior uveitis (AAU) patient feces in our previous study. To investigate the immunoregulatory effect of LA, we studied the effect of LA on human and murine dendritic cells (DCs), CD4+T cells, and retinal pigment epithelial (RPE) cells in vitro. METHODS The level of LA in feces from AAU patients and healthy individuals was measured by gas chromatography coupled with a mass spectrometer (GC-MS). The immunoregulatory effect of LA on human and murine DCs, CD4+ T cells, and RPE cells was evaluated by enzyme linked immunosorbent assay (ELISA) and flow cytometry (FCM). The effect of LA on DCs was evaluated by Tandem mass tag (TMT)-based proteomics analysis. RESULTS Increased LA was observed in feces from AAU patients (1018.35 ± 900.01 mg/kg) as compared with healthy individuals (472.55 ± 365.49 mg/kg, p = 0.0136). LA attenuated the antigen-presenting function of human and murine DCs by decreasing the expression of CD40, the secretion of IL-6 and IL-12p70, and the ability to shift naïve T cells towards T helper type 1 (Th1) and Th17 cells. LA also inhibited the secretion of MCP-1 and IL-8 from RPE cells. Proteomics analysis showed differential expression of 28 proteins, including squalene epoxidase (SQLE), farnesyl-diphosphate farnesyltransferase 1 (FDFT1), and cytochrome P450 family 51 subfamily A member 1 (CYP51A1), in LA-treated DCs compared with controls. LA also accelerated the apoptosis of DCs from healthy individuals. CONCLUSION LA inhibited the function of human and murine DCs, CD4+T cells, and RPE cells, regulated the expression of proteins, and promoted the apoptosis of human DCs. These results collectively suggest that LA might decrease the function of immune cells in vitro, and further studies are needed to investigate its role in the pathogenesis of AAU.
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Affiliation(s)
- Xinyue Huang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, People's Republic of China
| | - Shenglan Yi
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, People's Republic of China
| | - Jianping Hu
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, People's Republic of China
| | - Ziyu Du
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, People's Republic of China
| | - Qingfeng Wang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, People's Republic of China
| | - Zi Ye
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, People's Republic of China
| | - Guannan Su
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, People's Republic of China
| | - Aize Kijlstra
- University Eye Clinic Maastricht, Maastricht, Netherlands
| | - Peizeng Yang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, People's Republic of China.
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Dong M, Wang X, L T, Wang J, Yang Y, Liu Y, Jing Y, Zhao H, Chen J. Mir-27a-3p attenuates bronchiolitis obliterans in vivo via the regulation of dendritic cells' maturation and the suppression of myofibroblasts' differentiation. Clin Transl Med 2020; 10:e140. [PMID: 32898329 PMCID: PMC7423186 DOI: 10.1002/ctm2.140] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/16/2020] [Accepted: 07/17/2020] [Indexed: 01/02/2023] Open
Abstract
Bronchiolitis obliterans (BO), is a chronic rejection phenotype characterized by chronic small airway fibrous obliteration, hinders the patients who suffer from lung transplanting for surviving longer. Cell-based therapies using dendritic cells (DCs) and T regulatory cells (Tregs) have been developed to regulate allograft rejection, and to induce and maintain immune tolerance. In the present study, the effects of mir-27a-3p on regulating DCs as well as resulting effects on BO attenuation have been investigated. According to our reporter assays, the potential targets of mir-27a-3p were Smad2, sprouty2, and Smad4, respectively. Furthermore, sprouty2 inhibition by mir-27-3p indirectly activated extracellular regulated protein kinases (ERK) and increased IL-10 production in DCs. This led to a positive feedback loop that maintained the immature state of DCs via IL-10/JAK/STAT3 pathway, and caused an increase in Foxp3+ CD4+ T cells amount as well as TGF-β level. Furthermore, mir-27a-3p regulated TGF-β function, inhibited TGF-β/Smad pathway, and suppressed myofibroblast differentiation through influencing the function of Smad2 and Smad4. In short, the study indicated the effect of mir-27a-3p on suppressing DC maturation, which implicated the potential clinical application in treating postlung transplant BO.
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Affiliation(s)
- Ming Dong
- Department of Lung Cancer Surgery, Tianjin Medical University General Hospital, Tianjin, P. R. China
| | - Xin Wang
- Department of Pediatric Surgery, Tianjin Children's Hospital, Tianjin, P. R. China
| | - Tong L
- Department of Lung Cancer Surgery, Tianjin Medical University General Hospital, Tianjin, P. R. China
| | - Jing Wang
- Tianjin Key Laboratory of Lung Cancer Metastasis and Tumor Microenvironment, Tianjin Lung Cancer Institute, Tianjin Medical University General Hospital, Tianjin, P. R. China
| | - Yunwei Yang
- School of Basic Medical Sciences, Tianjin Medical University, Tianjin, P. R. China
| | - Yi Liu
- School of Basic Medical Sciences, Tianjin Medical University, Tianjin, P. R. China
| | - Yaqing Jing
- School of Basic Medical Sciences, Tianjin Medical University, Tianjin, P. R. China
| | - Honglin Zhao
- Department of Lung Cancer Surgery, Tianjin Medical University General Hospital, Tianjin, P. R. China
| | - Jun Chen
- Department of Lung Cancer Surgery, Tianjin Medical University General Hospital, Tianjin, P. R. China
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Huang X, Yi S, Hu J, Du Z, Wang Q, Ye Z, Cao Q, Su G, Yuan G, Zhou C, Wang Y, Kijlstra A, Yang P. Analysis of the role of palmitoleic acid in acute anterior uveitis. Int Immunopharmacol 2020; 84:106552. [PMID: 32422526 DOI: 10.1016/j.intimp.2020.106552] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 04/09/2020] [Accepted: 04/27/2020] [Indexed: 12/19/2022]
Abstract
PURPOSE To study the role of palmitoleic acid (PA) in the pathogenesis of acute anterior uveitis (AAU). METHODS PA levels in feces from AAU patients were measured by gas chromatography coupled with a mass spectrometer (GC-MS) and compared with samples obtained from healthy individuals. Enzyme linked immunosorbent assay (ELISA) and flow cytometry (FCM) were used to assess the effect of PA on dendritic cells (DCs) and CD4+T cells obtained from mice, AAU patients and healthy individuals. C57BL/6 mice were fed with PA or vehicle and experimental autoimmune uveitis (EAU) was induced with a human retinal IRBP651-670 peptide. Disease severity of EAU was evaluated by clinical manifestation and histology. Differentiation of splenic Type 1 helper T cells (Th1) and Th17 cells was evaluated by FCM. Tandem mass tag (TMT)-based proteomics analysis was used to identify differentially expressed proteins following incubation of DCs with PA. RESULTS The fecal concentration of PA was increased in AAU patients as compared with healthy individuals. In vitro, PA promoted apoptosis of DCs and inhibited the secretion of TNF-α from mouse bone-marrow-derived dendritic cells (BMDCs) as well as in DCs from AAU patients and healthy individuals. It only decreased DCs surface marker expression and IL-12p70 secretion in BMDCs and healthy individuals DCs but not in AAU patient DCs. PA-treated BMDCs inhibited Th cell differentiation from mouse naïve CD4+T cells and IL-17 and IFN-γ secretion in co-culture supernatants. PA also inhibited the differentiation of Th cells and secretion of IFN-γ and IL-17 in CD4+T cells from mice, AAU patients and healthy individuals. In vivo, PA-treated EAU mice showed milder clinical and histopathological intraocular manifestations as compared with the control group. PA feeding inhibited differentiation of splenic Th17 cells, whereas Th1 cells were not affected. Up to 30 upregulated and 77 downregulated proteins were identified when comparing PA-treated DCs with controls. CONCLUSION An increased expression of fecal PA was observed in AAU patients. PA was shown to have immunoregulatory effects on DCs and CD4+T cells and attenuated disease severity in EAU mice.
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Affiliation(s)
- Xinyue Huang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, PR China
| | - Shenglan Yi
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, PR China
| | - Jianping Hu
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, PR China
| | - Ziyu Du
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, PR China
| | - Qingfeng Wang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, PR China
| | - Zi Ye
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, PR China
| | - Qingfeng Cao
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, PR China
| | - Guannan Su
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, PR China
| | - Gangxiang Yuan
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, PR China
| | - Chunjiang Zhou
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, PR China
| | - Yao Wang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, PR China
| | - Aize Kijlstra
- University Eye Clinic Maastricht, Maastricht, the Netherlands
| | - Peizeng Yang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, and Chongqing Eye Institute, Chongqing, PR China.
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STAT3 Activation in Combination with NF-KappaB Inhibition Induces Tolerogenic Dendritic Cells with High Therapeutic Potential to Attenuate Collagen-Induced Arthritis. J Immunol Res 2019; 2019:1982570. [PMID: 31355296 PMCID: PMC6636450 DOI: 10.1155/2019/1982570] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 04/02/2019] [Accepted: 06/10/2019] [Indexed: 12/21/2022] Open
Abstract
Dendritic cells (DCs) have the ability to induce tolerance or inflammation in response to self-antigens, which makes them fundamental players in autoimmunity. In this regard, immunogenic DCs produce IL-12 and IL-23 favouring the acquisition of Th1 and Th17 inflammatory phenotypes, respectively, by autoreactive CD4+ T-cells, thus promoting autoimmunity. Conversely, tolerogenic DCs produce IL-10 and TGF-β, inducing the generation of CD4+ T-cells with suppressive activity (Treg), which promote tolerance to self-constituents. Previous studies have shown that STAT3 signalling in DCs attenuates the production of proinflammatory cytokines, whilst NF-κB activation promotes it. In this study, we aimed to generate DCs displaying strong and constitutive tolerogenic profile to be used as immunotherapy in autoimmunity. To this end, we transduced bone marrow-derived DCs with lentiviral particles codifying for a constitutively active version of STAT3 (constitutively active STAT3 (STAT3ca)) or with a constitutive repressor of NF-κB (IκBα superrepressor (IκBαSR)), and their therapeutic potential was evaluated in a mouse model of arthritis induced by collagen (CIA). Our results show that STAT3ca transduction favoured the production of the anti-inflammatory mediator IL-10, whereas IκBαSR transduction attenuated the expression of the proinflammatory cytokine IL-23 in DCs. Moreover, both STAT3ca-transduced and IκBαSR-transduced DCs separately exerted a mild but significant therapeutic effect reducing the severity of CIA development. Furthermore, when DCs were transduced with both STAT3ca and IκBαSR together, they reduced CIA manifestation significantly stronger than when transduced with only STAT3ca or IκBαSR separately. These results show STAT3 and NF-κB as two important and complementary regulators of the tolerogenic behaviour of DCs, which should be considered as molecular targets in the design of DC-based suppressive immunotherapies for the treatment of autoimmune disorders.
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Yu Y, Feng S, Wei S, Zhong Y, Yi G, Chen H, Liang L, Chen H, Lu X. Extracellular ATP activates P2X7R-NF-κB (p65) pathway to promote the maturation of bone marrow-derived dendritic cells of mice. Cytokine 2019; 119:175-181. [PMID: 30952064 DOI: 10.1016/j.cyto.2019.03.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/27/2019] [Accepted: 03/28/2019] [Indexed: 12/23/2022]
Abstract
The maturation state of dendritic cell (DC) plays an important role in immune activities. Previously we had found that NF-κB (p65) pathway could promote DC maturation and subsequent immune effects. But the upstream mechanism of this pathway was still unclear. Extracellular adenosine triphosphate (ATP) activating its receptor P2X7R has recently been considered as the fourth signal to activate T lymphocytes. Here we aimed to find out the connection between P2X7R and NF-κB (p65) pathway in DC maturation. Results showed that the expression of P2X7R and the intracellular ATP levels were increased along with the maturation of DC. P2X7R agonist stimulated the morphological changes of DCs into the appearance of mature DCs, and promoted the expression of NF-κB (p65), as well as the release of IFN-γ and IL-12. Whereas, P2X7R inhibitor had the opposite influences. Co-immunoprecipitation assay confirmed the binding of P2X7R and NF-κB (p65). Our study suggested that extracellular ATP could promote DC maturation and release of inflammatory cytokines through the binding of P2X7R and NF-κB (p65). This is the first study to show the P2X7R-NF-κB (p65) pathway in DC. Interference with this pathway may be able to regulate immune responses in areas like infectious diseases, inflammation, transplantation, tumor and autoimmune diseases. In addition, intracellular ATP level could be a new indicator of the maturation state of DC.
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Affiliation(s)
- Ying Yu
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Songfu Feng
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Shiyu Wei
- Department of Ophthalmology, Liuzhou General Hospital, Liuzhou 545006, China
| | - Yanyan Zhong
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Guoguo Yi
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Haiyan Chen
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Lifang Liang
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Hui Chen
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Xiaohe Lu
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China.
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Lu X, Wu J, Ma M, Wu X, Wen J, Yu J. An integrated deep sequencing analysis of microRNAs in transplanted corneas. Mol Immunol 2018; 101:429-439. [DOI: 10.1016/j.molimm.2018.06.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 04/28/2018] [Accepted: 06/09/2018] [Indexed: 10/28/2022]
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