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Yang QQ, Zhang HY, Duan XH, Li MH, Sun J, Tian LX, Dong JC, Kong LW. Astragaloside IV targeting autophagy of T cells improves inflammation of asthma. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2024; 26:699-713. [PMID: 38213072 DOI: 10.1080/10286020.2023.2294069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 12/03/2023] [Indexed: 01/13/2024]
Abstract
Astragaloside IV (AST) has been confirmed to have antiasthmatic effects. However, the underline mechanism is unclear. The study aimed to explore the treatment mechanism of AST based on autophagy of memory T cells. AST treatment significantly decreased the number of T effector cells in asthma mice blood and the nude mice that received AST-treated TCMs had relieved inflammation compared with the untreated group; meanwhile, we found that AST significantly decreased the autophagy level and inhibited OX40/OX40L signal pathway of lymphocytes. The results highlighted that AST regulated autophagy to inhibit differentiation of effector T-cell phenotype.
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Affiliation(s)
- Qing-Qing Yang
- Shanghai Public Health Clinical Center Affiliated to Fudan University, Shanghai 200040, China
| | - Hong-Ying Zhang
- Institute of Integrated Traditional Chinese and Western Medicine, Huashan Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Xiao-Hong Duan
- Institute of Integrated Traditional Chinese and Western Medicine, Huashan Hospital Affiliated to Fudan University, Shanghai 200040, China
- Department of Integrated Traditional Chinese and Western Medicine, Huashan Hospital Affiliated to Fudan University, Shanghai 201508, China
| | - Mi-Hui Li
- Institute of Integrated Traditional Chinese and Western Medicine, Huashan Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Jing Sun
- Institute of Integrated Traditional Chinese and Western Medicine, Huashan Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Li-Xia Tian
- Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai 201508, China
| | - Jing-Cheng Dong
- Institute of Integrated Traditional Chinese and Western Medicine, Huashan Hospital Affiliated to Fudan University, Shanghai 200040, China
- Department of Integrated Traditional Chinese and Western Medicine, Huashan Hospital Affiliated to Fudan University, Shanghai 201508, China
| | - Ling-Wen Kong
- Institute of Integrated Traditional Chinese and Western Medicine, Huashan Hospital Affiliated to Fudan University, Shanghai 200040, China
- Department of Integrated Traditional Chinese and Western Medicine, Huashan Hospital Affiliated to Fudan University, Shanghai 201508, China
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Fu Y, Huang FY, Dai SZ, Wang L, Zhou X, Zheng ZY, Wang CC, Tan GH, Li Q. Penicilazaphilone C alleviates allergic airway inflammation and improves the immune microenvironment by hindering the NLRP3 inflammasome. Biomed Pharmacother 2024; 175:116788. [PMID: 38772153 DOI: 10.1016/j.biopha.2024.116788] [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: 12/13/2023] [Revised: 05/17/2024] [Accepted: 05/17/2024] [Indexed: 05/23/2024] Open
Abstract
AIMS Penicilazaphilone C (PAC) is hypothesized to potentially serve as a therapeutic treatment for allergic airway inflammation by inhibiting the NLRP3 inflammasome and reducing oxidative stress. METHODS An allergic asthma model was induced in female BALB/c mice of the OVA, OVA+PAC, OVA+PAC+LPS, and OVA+Dex groups by sensitizing and subsequently challenging them with OVA. The OVA+PAC and Normal+PAC groups were treated with PAC, while the OVA+PAC+LPS group also received LPS. The OVA+Dex group was given dexamethasone (Dex). Samples of serum, bronchoalveolar lavage fluid (BALF), and lung tissue were collected for histological and cytological analysis. RESULTS Allergic mice treated with PAC or Dex showed inhibited inflammation and mucus production in the lungs. There was a decrease in the number of inflammatory cells in the BALF, lower levels of inflammatory cytokines in the serum and BALF, and a reduction in the protein expression of NLRP3, ASC, cleaved caspase-1, IL-1β, activated gasdermin D, MPO, Ly6G, and ICAM-1. Additionally, oxidative stress was reduced, as shown by a decrease in MDA and DCF, but an increase in SOD and GSH. Treatment with PAC also resulted in a decrease in pulmonary memory CD4+ T cells and an increase in regulatory T cells. However, the positive effects seen in the PAC-treated mice were reversed when the NLRP3 inflammasome was activated by LPS, almost returning to the levels of the Sham-treated mice. SIGNIFICANCE PAC acts in a similar way to anti-allergic inflammation as Dex, suggesting it may be a viable therapeutic option for managing allergic asthma inflammation.
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Affiliation(s)
- Yongshu Fu
- Department of Respiratory Medicine, The First Affiliated Hospital of Hainan Medical University & Hainan Province Clinical Medical Center of Respiratory Disease, Haikou 570102, China
| | - Feng-Ying Huang
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine & The Second Affiliated Hospital, Hainan Medical University, Haikou, China.
| | - Shu-Zhen Dai
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine & The Second Affiliated Hospital, Hainan Medical University, Haikou, China
| | - Lin Wang
- Department of Respiratory Medicine, The First Affiliated Hospital of Hainan Medical University & Hainan Province Clinical Medical Center of Respiratory Disease, Haikou 570102, China
| | - Xiangdong Zhou
- Department of Respiratory Medicine, The First Affiliated Hospital of Hainan Medical University & Hainan Province Clinical Medical Center of Respiratory Disease, Haikou 570102, China
| | - Zhen-You Zheng
- Department of Ophthalmology, The First Affiliated Hospital of Hainan Medical University, Haikou 570102, China
| | - Cai-Chun Wang
- Department of Respiratory Medicine, The First Affiliated Hospital of Hainan Medical University & Hainan Province Clinical Medical Center of Respiratory Disease, Haikou 570102, China
| | - Guang-Hong Tan
- NHC Key Laboratory of Tropical Disease Control, School of Tropical Medicine & The Second Affiliated Hospital, Hainan Medical University, Haikou, China.
| | - Qi Li
- Department of Respiratory Medicine, The First Affiliated Hospital of Hainan Medical University & Hainan Province Clinical Medical Center of Respiratory Disease, Haikou 570102, China.
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Zhang J, Huang FY, Dai SZ, Wang L, Zhou X, Zheng ZY, Li Q, Tan GH, Wang CC. Toxicarioside H-mediated modulation of the immune microenvironment attenuates ovalbumin-induced allergic airway inflammation by inhibiting NETosis. Int Immunopharmacol 2024; 136:112329. [PMID: 38815351 DOI: 10.1016/j.intimp.2024.112329] [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: 01/13/2024] [Revised: 05/03/2024] [Accepted: 05/20/2024] [Indexed: 06/01/2024]
Abstract
PURPOSE Our team identified a new cardiac glycoside, Toxicarioside H (ToxH), in a tropical plant. Previous research has indicated the potential of cardenolides in mitigating inflammation, particularly in the context of NETosis. Therefore, this study sought to examine the potential of ToxH in attenuating allergic airway inflammation by influencing the immune microenvironment. METHODS An OVA-induced airway inflammation model was established in BALB/c mice. After the experiment was completed, serum, bronchoalveolar lavage fluid (BALF), and lung tissue samples were collected and further examined using H&E and PAS staining, flow cytometry, immunofluorescence observation, and Western blot analysis. RESULTS Treatment with ToxH was found to be effective in reducing airway inflammation and mucus production. This was accompanied by an increase in Th1 cytokines (IFN-γ, IL-2, and TNF-β), and the Th17 cytokine IL-17, while levels of Th2 cytokines (IL-4, IL-5, and IL-13) and Treg cytokines (IL-10 and TGF-β1) were decreased in both the bronchoalveolar lavage fluid (BALF) and the CD45+ immune cells in the lungs. Additionally, ToxH inhibited the infiltration of inflammatory cells and decreased the number of pulmonary CD44+ memory T cells, while augmenting the numbers of Th17 and Treg cells. Furthermore, the neutrophil elastase inhibitor GW311616A was observed to suppress airway inflammation and mucus production, as well as alter the secretion of immune Th1, Th2, Th17, and Treg cytokines in the lung CD45+ immune cells. Moreover, our study also demonstrated that treatment with ToxH efficiently inhibited ROS generation, thereby rectifying the dysregulation of immune cells in the immune microenvironment in OVA-induced allergic asthma. CONCLUSIONS Our findings indicate that ToxH could serve as a promising therapeutic intervention for allergic airway inflammation and various other inflammatory disorders. Modulating the balance of Th1/Th2 and Treg/Th17 cells within the pulmonary immune microenvironment may offer an effective strategy for controlling allergic airway inflammation.
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Affiliation(s)
- Jiaqi Zhang
- Department of Respiratory Medicine, The First Affiliated Hospital of Hainan Medical University & Hainan Province Clinical Medical Center of Respiratory Disease, Haikou 570102, China
| | - Feng-Ying Huang
- Key Laborato1y of Tropical Translational Medicine of Ministry of Education & School of Tropical Medicine, Hainan Medical University, Haikou 571199, China
| | - Shu-Zhen Dai
- Department of Respiratory Medicine, The First Affiliated Hospital of Hainan Medical University & Hainan Province Clinical Medical Center of Respiratory Disease, Haikou 570102, China
| | - Lin Wang
- Department of Respiratory Medicine, The First Affiliated Hospital of Hainan Medical University & Hainan Province Clinical Medical Center of Respiratory Disease, Haikou 570102, China; Key Laborato1y of Tropical Translational Medicine of Ministry of Education & School of Tropical Medicine, Hainan Medical University, Haikou 571199, China
| | - Xiangdong Zhou
- Department of Respiratory Medicine, The First Affiliated Hospital of Hainan Medical University & Hainan Province Clinical Medical Center of Respiratory Disease, Haikou 570102, China
| | - Zhen-You Zheng
- Department of Ophthalmology, The First Affiliated Hospital of Hainan Medical University, Haikou 570102, China
| | - Qi Li
- Department of Respiratory Medicine, The First Affiliated Hospital of Hainan Medical University & Hainan Province Clinical Medical Center of Respiratory Disease, Haikou 570102, China.
| | - Guang-Hong Tan
- Key Laborato1y of Tropical Translational Medicine of Ministry of Education & School of Tropical Medicine, Hainan Medical University, Haikou 571199, China.
| | - Cai-Chun Wang
- Department of Respiratory Medicine, The First Affiliated Hospital of Hainan Medical University & Hainan Province Clinical Medical Center of Respiratory Disease, Haikou 570102, China.
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Mitra S, Malik R, Wong W, Rahman A, Hartemink AJ, Pritykin Y, Dey KK, Leslie CS. Single-cell multi-ome regression models identify functional and disease-associated enhancers and enable chromatin potential analysis. Nat Genet 2024; 56:627-636. [PMID: 38514783 PMCID: PMC11018525 DOI: 10.1038/s41588-024-01689-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 02/14/2024] [Indexed: 03/23/2024]
Abstract
We present a gene-level regulatory model, single-cell ATAC + RNA linking (SCARlink), which predicts single-cell gene expression and links enhancers to target genes using multi-ome (scRNA-seq and scATAC-seq co-assay) sequencing data. The approach uses regularized Poisson regression on tile-level accessibility data to jointly model all regulatory effects at a gene locus, avoiding the limitations of pairwise gene-peak correlations and dependence on peak calling. SCARlink outperformed existing gene scoring methods for imputing gene expression from chromatin accessibility across high-coverage multi-ome datasets while giving comparable to improved performance on low-coverage datasets. Shapley value analysis on trained models identified cell-type-specific gene enhancers that are validated by promoter capture Hi-C and are 11× to 15× and 5× to 12× enriched in fine-mapped eQTLs and fine-mapped genome-wide association study (GWAS) variants, respectively. We further show that SCARlink-predicted and observed gene expression vectors provide a robust way to compute a chromatin potential vector field to enable developmental trajectory analysis.
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Affiliation(s)
- Sneha Mitra
- Computational and Systems Biology Program, Memorial Sloan Kettering Cancer Center, New York City, NY, USA
| | | | - Wilfred Wong
- Computational and Systems Biology Program, Memorial Sloan Kettering Cancer Center, New York City, NY, USA
- Tri-Institutional Training Program in Computational Biology and Medicine, New York City, NY, USA
| | - Afsana Rahman
- Hunter College, City University of New York, New York City, NY, USA
| | - Alexander J Hartemink
- Department of Computer Science, Duke University, Durham, NC, USA
- Program in Computational Biology and Bioinformatics, Duke University, Durham, NC, USA
- Center for Genomic and Computational Biology, Duke University, Durham, NC, USA
| | - Yuri Pritykin
- Computational and Systems Biology Program, Memorial Sloan Kettering Cancer Center, New York City, NY, USA
- Department of Computer Science, Princeton University, Princeton, NJ, USA
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA
| | - Kushal K Dey
- Computational and Systems Biology Program, Memorial Sloan Kettering Cancer Center, New York City, NY, USA.
| | - Christina S Leslie
- Computational and Systems Biology Program, Memorial Sloan Kettering Cancer Center, New York City, NY, USA.
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Sha J, Zhang M, Feng J, Shi T, Li N, Jie Z. Promyelocytic leukemia zinc finger controls type 2 immune responses in the lungs by regulating lineage commitment and the function of innate and adaptive immune cells. Int Immunopharmacol 2024; 130:111670. [PMID: 38373386 DOI: 10.1016/j.intimp.2024.111670] [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: 12/28/2023] [Revised: 01/31/2024] [Accepted: 02/06/2024] [Indexed: 02/21/2024]
Abstract
Type 2 immune responses are critical for host defense, mediate allergy and Th2-high asthma. The transcription factor, promyelocytic leukemia zinc finger (PLZF), has emerged as a significant regulator of type 2 inflammation in the lung; however, its exact mechanism remains unclear. In this review, we summarized recent findings regarding the ability of PLZF to control the development and function of innate lymphoid cells (ILCs), iNKT cells, memory T cells, basophils, and other immune cells that drive type 2 responses. We discussed the important role of PLZF in the pathogenesis of Th2-high asthma. Collectively, prior studies have revealed the critical role of PLZF in the regulation of innate and adaptive immune cells involved in type 2 inflammation in the lung. Therefore, targeting PLZF signaling represents a promising therapeutic approach to suppress Th2-high asthma.
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Affiliation(s)
- Jiafeng Sha
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Meng Zhang
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Jingjing Feng
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Tianyun Shi
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Na Li
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Zhijun Jie
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China; Center of Community-Based Health Research, Fudan University, Shanghai, China.
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Li N, Shi T, Zhang M, He Y, Feng J, Mei Z, Su X, Jie Z. PLZF promotes the development of asthma tolerance via affecting memory phenotypes of immune cells. Int Immunopharmacol 2023; 114:109559. [PMID: 36525795 DOI: 10.1016/j.intimp.2022.109559] [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: 10/09/2022] [Revised: 12/02/2022] [Accepted: 12/05/2022] [Indexed: 12/15/2022]
Abstract
Clarifying the pathogenesis of asthma and/or identifying the specific pathway underlying oral asthma tolerance (OT) would be of great significance. In our previous study, promyelocytic leukemia zinc finger (PLZF), which reportedly regulates memory phenotypes, was found to promote ovalbumin (OVA)-induced OT. Therefore, this study aimed to explore the regulatory effects of PLZF on memory phenotypes in asthma and OT mouse models. We found that Zbtb16 (encoding PLZF) and PLZF+ cells were highly increased in OT lungs compared with asthmatic lungs. PLZF was co-expressed with GATA3, and IL-4+PLZF+ cells were significantly lower in OT lungs than in asthmatic lungs. Notably, memory cells were decreased in OT mice, and these mice had PLZF+ cells that expressed lower levels of CD44 than those of asthmatic mice. When Zbtb16 was overexpressed in splenic lymphocytes, the number of CD44+ cells decreased. There were increased memory cells in splenic lymphocytes after treatment with the supernatant of OVA-treated airway epithelial cells; however, this was reversed by Zbtb16 overexpression. Early respiratory syncytial virus infection increased memory cells and reduced PLZF+ cells in the OT mice. Collectively, these results indicate that PLZF may reduce the proportion of memory cells, thereby, promoting the establishment of OT.
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Affiliation(s)
- Na Li
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China; Department of Medicine, Respiratory, Emergency and Intensive Care Medicine, The Affiliated Dushu Lake Hospital of Soochow University, Suzhou, China
| | - Tianyun Shi
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Meng Zhang
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Yanchao He
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Jingjing Feng
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Zhoufang Mei
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Xiao Su
- Unit of Respiratory Infection and Immunity, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China.
| | - Zhijun Jie
- Department of Pulmonary and Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China.
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Li M, Zhu W, Saeed U, Sun S, Fang Y, Wang C, Luo Z. Identification of the molecular subgroups in asthma by gene expression profiles: airway inflammation implications. BMC Pulm Med 2022; 22:29. [PMID: 35000593 PMCID: PMC8742931 DOI: 10.1186/s12890-022-01824-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 12/24/2021] [Indexed: 11/21/2022] Open
Abstract
Background Asthma is a heterogeneous disease and different phenotypes based on clinical parameters have been identified. However, the molecular subgroups of asthma defined by gene expression profiles of induced sputum have been rarely reported. Methods We re-analyzed the asthma transcriptional profiles of the dataset of GSE45111. A deep bioinformatics analysis was performed. We classified 47 asthma cases into different subgroups using unsupervised consensus clustering analysis. Clinical features of the subgroups were characterized, and their biological function and immune status were analyzed using Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) and single sample Gene Set Enrichment Analysis (ssGSEA). Weighted gene co-expression network analysis (WGCNA) and protein–protein interaction (PPI) network were performed to identify key gene modules and hub genes. Results Unsupervised consensus clustering of gene expression profiles in asthma identified two distinct subgroups (Cluster I/II), which were significantly associated with eosinophilic asthma (EA) and paucigranulocytic asthma (PGA). The differentially expressed genes (DEGs) between the two subgroups were primarily enriched in immune response regulation and signal transduction. The ssGSEA suggested the different immune infiltration and function scores between the two clusters. The WGCNA and PPI analysis identified three hub genes: THBS1, CCL22 and CCR7. ROC analysis further suggested that the three hub genes had a good ability to differentiate the Cluster I from the Cluster II. Conclusions Based on the gene expression profiles of the induced sputum, we identified two asthma subgroups, which revealed different clinical characteristics, gene expression patterns, biological functions and immune status. The transcriptional classification confirms the molecular heterogeneity of asthma and provides a framework for more in-depth research on the mechanisms of asthma. Supplementary Information The online version contains supplementary material available at 10.1186/s12890-022-01824-3.
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Affiliation(s)
- Min Li
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Kunming Medical University, Kunming, 650000, People's Republic of China
| | - Wenye Zhu
- Department of Pharmacy, First Affiliated Hospital of Kunming Medical University, Kunming, People's Republic of China
| | - Ummair Saeed
- Department of Dermatology, National Orthopedic and General Hospital, Bahawalpur, Pakistan
| | - Shibo Sun
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Kunming Medical University, Kunming, 650000, People's Republic of China
| | - Yan Fang
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Kunming Medical University, Kunming, 650000, People's Republic of China
| | - Chu Wang
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Kunming Medical University, Kunming, 650000, People's Republic of China
| | - Zhuang Luo
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Kunming Medical University, Kunming, 650000, People's Republic of China.
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Min Z, Zeng Y, Zhu T, Cui B, Mao R, Jin M, Chen Z. Lipopolysaccharide-Activated Bone Marrow-Derived Dendritic Cells Suppress Allergic Airway Inflammation by Ameliorating the Immune Microenvironment. Front Immunol 2021; 12:595369. [PMID: 34093516 PMCID: PMC8171252 DOI: 10.3389/fimmu.2021.595369] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Accepted: 04/27/2021] [Indexed: 12/20/2022] Open
Abstract
Background Previous studies have shown that lipopolysaccharide (LPS)-activated bone marrow-derived dendritic cells (DClps) might induce tolerance in autoimmune and cancer models in vivo, whereas it remains unclear whether DClps could play a role in allergic disease model. Herein, we aimed to elucidate the potential effects of DClps on OVA-sensitized/challenged airway inflammation in a mouse model, which may help facilitate the application of specific tolerogenic dendritic cells (tolDC) in allergic asthma in the future. Methods The phenotype and function of immature DC (DCia), DClps or IL-10-activated-DC (DC10) were determined. OVA-sensitized/challenged mice were treated with OVA-pulsed DCia or DClps or DC10. We assessed the changes of histopathology, serum total IgE level, pulmonary signal transducers and activators of transcription (STAT), pulmonary regulatory T cells (Tregs), and airway recall responses to OVA rechallenge, including proliferation and cytokine secretory function of pulmonary memory CD4+ T cells in the treated mice. Results DClps exhibited low levels of CD80 and MHCII and increased levels of anti-inflammatory cytokines such as IL-10 and TGF-β. Additionally, DClps treatment dramatically diminished infiltration of inflammatory cells, eosinophilia, serum IgE and STAT6 phosphorylation level, increased the number of pulmonary Tregs. In addition, DClps treatment decreased the proliferation of pulmonary memory CD4+ T cells, which further rendered the downregulation of Th2 cytokines in vitro. Conclusion LPS stimulation may lead to a tolerogenic phenotype on DC, and thereby alleviated the Th2 immune response of asthmatic mice, possibly by secreting anti-inflammatory cytokines, inhibiting pulmonary memory CD4+ T cells, downregulating pulmonary STAT6 phosphorylation level and increasing pulmonary Tregs.
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Affiliation(s)
- Zhihui Min
- Research Center of Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yuzhen Zeng
- Department of Pulmonary and Critical Care Medicine, Shanghai Institute of Respiratory Disease, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Tao Zhu
- Department of Respiratory Medicine, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Bo Cui
- Department of Pulmonary and Critical Care Medicine, Shanghai Institute of Respiratory Disease, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ruolin Mao
- Department of Pulmonary and Critical Care Medicine, Shanghai Institute of Respiratory Disease, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Meiling Jin
- Department of Pulmonary and Critical Care Medicine, Shanghai Institute of Respiratory Disease, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhihong Chen
- Department of Pulmonary and Critical Care Medicine, Shanghai Institute of Respiratory Disease, Zhongshan Hospital, Fudan University, Shanghai, China
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