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Yu J, Yang K, Cheng YJ, Shen JL, Ouyang W, Zhang W, Zhang JH, Xie CH. [Impact of the depth of remission by induction chemotherapy on the prognosis of limited stage small cell lung cancer]. Zhonghua Zhong Liu Za Zhi 2023; 45:621-626. [PMID: 37462019 DOI: 10.3760/cma.j.cn112152-20220107-00019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Objective: To evaluate the effect of depth of remission of induction chemotherapy on the overall prognosis of limited stage small cell lung cancer (L-SCLC). Methods: The study was a retrospective, L-SCLC patients who contained complete imaging data and underwent consecutive standardized treatments at the Department of Thoracic Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University between January 2013 and June 2021 were included. To delineate the volume of tumor before and after induction chemotherapy and to calculate the depth of remission caused by the induced chemotherapy. The time receiver operating characteristic (timeROC) method was used to determine the optimal predictors for prognosis, multi-factor analysis using Cox risk proportional model. Results: A total of 104 patients were included in this study. The median PFS and OS of this cohort were 13.7 months and 20.9 months, respectively. It was observed by timeROC analysis that residual tumor volume after induction chemotherapy had the optimal predictive value of PFS at 1 year (AUC=0.86, 95% CI: 0.78~0.94) and OS at 2 years (AUC=0.76, 95% CI: 0.65~0.87). Multivariate analysis showed residual tumor volume after induction chemotherapy was the independent prognostic factor to PFS (HR=1.006, 95% CI: 1.003~1.009, P<0.01) and OS (HR=1.009, 95% CI: 1.005~1.012, P<0.001). For those whose residual tumor volume remitted to less than 10 cm(3) after induction chemotherapy, the favorable long-term outcomes could be achieved, regardless of their initial tumor load. Conclusion: The depth of remission of induction chemotherapy could be a promising prognostic predictor to the L-SCLC and provide the individualized treatment guidance.
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Affiliation(s)
- J Yu
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Key Laboratory of Tumor Biological Behavior, Hubei Cancer Clinical Study Center, Wuhan 430071, China
| | - K Yang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Key Laboratory of Tumor Biological Behavior, Hubei Cancer Clinical Study Center, Wuhan 430071, China
| | - Y J Cheng
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Key Laboratory of Tumor Biological Behavior, Hubei Cancer Clinical Study Center, Wuhan 430071, China
| | - J L Shen
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Key Laboratory of Tumor Biological Behavior, Hubei Cancer Clinical Study Center, Wuhan 430071, China
| | - W Ouyang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Key Laboratory of Tumor Biological Behavior, Hubei Cancer Clinical Study Center, Wuhan 430071, China
| | - W Zhang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Key Laboratory of Tumor Biological Behavior, Hubei Cancer Clinical Study Center, Wuhan 430071, China
| | - J H Zhang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Key Laboratory of Tumor Biological Behavior, Hubei Cancer Clinical Study Center, Wuhan 430071, China
| | - C H Xie
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Key Laboratory of Tumor Biological Behavior, Hubei Cancer Clinical Study Center, Wuhan 430071, China
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Yang W, Su S, Ouyang W, Ma Z, Chen X, Li H, Lu B. To Evaluate the Efficiency and Safety of Nab-paclitaxel Plus Cisplatin and Concomitant Thoracic Radiotherapy in Locally Advanced Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.1290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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3
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Ren W, Yu Y, He Z, Mao L, Chen Y, Ouyang W, Tan Y, Li C, Chen K, Ouyang J, Hu Q, Xie C, Yao H. 133P Magnetic resonance imaging radiomics predicts high and low recurrence risk and is associated with LncRNAs in early-stage invasive breast cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Yu J, Ouyang W, Huang Z, Chen G, Zhou Y, Mao YL, Zhang JH, Xie CH. [Outcomes and the role of adjuvant therapy of limited stage small cell lung cancer undergoing surgical treatment]. Zhonghua Zhong Liu Za Zhi 2020; 42:336-339. [PMID: 32375451 DOI: 10.3760/cma.j.cn112152-20190626-00397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the outcomes of limited stage small cell lung cancer (L-SCLC) undergoing surgical therapy and to explore the value of adjuvant therapy for those patients. Methods: A retrospective analysis was initialed for the L-SCLC patients who underwent the surgical treatment in the Zhongnan Hospital of Wuhan University from January 2012 to December 2018. The median disease-free survival (DFS) and overall survival (OS) were calculated by Kaplan-Meier method. Cox regression was used to explore the prognostic factors. Results: A total of 44 patients were included in our study. The median DFS was 25 months, 1- and 2-year DFS rate were 70.2% and 51.9%, respectively. The median OS was 41 months, 1- and 2- year OS rate were 88.4% and 69.9%, respectively. Multivariate analysis showed male (RR=6.56, P=0.03), T3-4 (RR=6.23, P=0.01), pathological lymph node metastasis (RR=6.52, P=0.03) and adjuvant radiotherapy (RR=0.13, P=0.002) were associated with disease relapse significantly. Moreover, pathological lymph node metastasis (RR=3.62, P=0.01) coupled with sufficient adjuvant chemotherapy (≥4 cycles) (RR=0.12, P=0.01) were independent prognostic factors of OS. Conclusions: Surgical therapy may be an alternative primary treatment for L-SCLC. Additional adjuvant radiotherapy can reduce the risk of recurrence. Giving sufficient course of adjuvant chemotherapy can improve OS.
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Affiliation(s)
- J Yu
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors, Hubei Cancer Clinical Study Center, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - W Ouyang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors, Hubei Cancer Clinical Study Center, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Z Huang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors, Hubei Cancer Clinical Study Center, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - G Chen
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors, Hubei Cancer Clinical Study Center, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Y Zhou
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors, Hubei Cancer Clinical Study Center, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Y L Mao
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors, Hubei Cancer Clinical Study Center, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - J H Zhang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors, Hubei Cancer Clinical Study Center, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - C H Xie
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors, Hubei Cancer Clinical Study Center, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
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5
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Wang H, Xue W, Ouyang W, Jiang X, Jiang X. miR-23a-3p/SIX1 regulates glucose uptake and proliferation through GLUT3 in head and neck squamous cell carcinomas. J Cancer 2020; 11:2529-2539. [PMID: 32201523 PMCID: PMC7066005 DOI: 10.7150/jca.30995] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 01/15/2020] [Indexed: 02/06/2023] Open
Abstract
SIX1 overexpression has been reported in several cancers. However, its involvement in head and neck squamous cell carcinoma (HNSCC) remains unclear. In this study we investigated the clinical significance and biological roles of SIX1 in HNSCC. SIX1 expression was upregulated in HNSCC and correlated with TNM stage and nodal metastasis. Analysis of TCGA dataset demonstrated that high SIX1 expression correlated with poor patient prognosis. Overexpression of SIX1 in the Fadu cell line upregulated cell proliferation, colony formation, glucose uptake and ATP production. In contrast, SIX1 depletion in the Detroit562 cell line downregulated cell proliferation, colony formation, glucose uptake and ATP production. We analyzed a series of genes involved in glucose metabolism and found that SIX1 overexpression upregulated GLUT3, an important glucose transporter, at both mRNA and protein levels. Using the TRANSFAC database, we found that SIX1 had potential binding sites on the GLUT3 promoter, which was validated by chromatin immunoprecipitation (ChIP) assays. Next, we focused on miR-23a-3p, which could target SIX1 in HNSCC cells. The miR-23a-3p mimic downregulated SIX1 expression while the miR-23a-3p inhibitor upregulated SIX1 expression. The binding of miR-23a-3p to the 3'-UTR of SIX1 was confirmed using the luciferase reporter assay. Analysis of TCGA dataset showed a negative correlation between the miR-23a-3p and SIX1. Furthermore, the miR-23a-3p mimic inhibited cell proliferation, ATP production and glucose uptake, which could be rescued by transfection with the SIX1 plasmid. In summary, our study demonstrated that SIX1 facilitated HNSCC cell growth through regulation of GLUT3 and glucose uptake. miR-23a-3p targeted the SIX1/GLUT3 axis and suppressed glucose uptake and proliferation in HNSCC.
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Affiliation(s)
- Hongming Wang
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Weishuang Xue
- Department of Neurology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Wunyu Ouyang
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xiaoze Jiang
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xuejun Jiang
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
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Yu J, Ouyang W, Hu J, Zhang J, Xie C. Value of post-radiotherapy for limited stage small cell lung cancer on basis of a prognostic scoring model. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz071.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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7
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Yu J, Li C, Ouyang W, Xu Y, Zhang J, Xie C. EP-1406 Mapping Pattern of LNMs for Postoperative Radiotherapy in TESCC: Defining the Clinical Target Volume. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31826-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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8
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Pesce M, Critto A, Torresan S, Giubilato E, Santini M, Zirino A, Ouyang W, Marcomini A. Modelling climate change impacts on nutrients and primary production in coastal waters. Sci Total Environ 2018; 628-629:919-937. [PMID: 30045581 DOI: 10.1016/j.scitotenv.2018.02.131] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 02/11/2018] [Accepted: 02/11/2018] [Indexed: 06/08/2023]
Abstract
There is high confidence that the anthropogenic increase of atmospheric greenhouse gases (GHGs) is causing modifications in the Earth's climate. Coastal waterbodies such as estuaries, bays and lagoons are among those most affected by the ongoing changes in climate. Being located at the land-sea interface, such waterbodies are subjected to the combined changes in the physical-chemical processes of atmosphere, upstream land and coastal waters. Particularly, climate change is expected to alter phytoplankton communities by changing their environmental drivers (especially climate-related), thus exacerbating the symptoms of eutrophication events, such as hypoxia, harmful algal blooms (HAB) and loss of habitat. A better understanding of the links between climate-related drivers and phytoplankton is therefore necessary for projecting climate change impacts on aquatic ecosystems. Here we present the case study of the Zero river basin in Italy, one of the main contributors of freshwater and nutrient to the salt-marsh Palude di Cona, a coastal waterbody belonging to the lagoon of Venice. To project the impacts of climate change on freshwater inputs, nutrient loadings and their effects on the phytoplankton community of the receiving waterbody, we formulated and applied an integrated modelling approach made of: climate simulations derived by coupling a General Circulation Model (GCM) and a Regional Climate Model (RCM) under alternative emission scenarios, the hydrological model Soil and Water Assessment Tool (SWAT) and the ecological model AQUATOX. Climate projections point out an increase of precipitations in the winter period and a decrease in the summer months, while temperature shows a significant increase over the whole year. Water discharge and nutrient loads simulated by SWAT show a tendency to increase (decrease) in the winter (summer) period. AQUATOX projects changes in the concentration of nutrients in the salt-marsh Palude di Cona, and variations in the biomass and species of the phytoplankton community.
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Affiliation(s)
- M Pesce
- University Ca' Foscari of Venice, Italy
| | - A Critto
- University Ca' Foscari of Venice, Italy; Centro Euro-Mediterraneo sui Cambiamenti Climatici, Italy.
| | - S Torresan
- University Ca' Foscari of Venice, Italy; Centro Euro-Mediterraneo sui Cambiamenti Climatici, Italy
| | | | - M Santini
- Centro Euro-Mediterraneo sui Cambiamenti Climatici, Italy
| | - A Zirino
- Scripps Institution of Oceanography, CA, USA
| | - W Ouyang
- Beijing Normal University, China
| | - A Marcomini
- University Ca' Foscari of Venice, Italy; Centro Euro-Mediterraneo sui Cambiamenti Climatici, Italy
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Yang C, Yu Z, Zhang W, Cao L, Ouyang W, Hu F, Zhang P, Bai X, Ruan C. A novel missense mutation, p.Phe360Cys, in FIX gene results in haemophilia B in a female patient with skewed X-inactivation. Haemophilia 2018; 24:e68-e70. [PMID: 29405493 DOI: 10.1111/hae.13423] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/20/2017] [Indexed: 11/30/2022]
Affiliation(s)
- C. Yang
- Jiangsu Institute of Hematology; Key Laboratory of Thrombosis and Hemostasis/Ministry of Health; The First Affiliated Hospital of Soochow University; Suzhou China
- Collaborative Innovation Center of Hematology; Soochow University; Suzhou China
| | - Z. Yu
- Jiangsu Institute of Hematology; Key Laboratory of Thrombosis and Hemostasis/Ministry of Health; The First Affiliated Hospital of Soochow University; Suzhou China
- Collaborative Innovation Center of Hematology; Soochow University; Suzhou China
| | - W. Zhang
- Jiangsu Institute of Hematology; Key Laboratory of Thrombosis and Hemostasis/Ministry of Health; The First Affiliated Hospital of Soochow University; Suzhou China
- Collaborative Innovation Center of Hematology; Soochow University; Suzhou China
| | - L. Cao
- Jiangsu Institute of Hematology; Key Laboratory of Thrombosis and Hemostasis/Ministry of Health; The First Affiliated Hospital of Soochow University; Suzhou China
- Collaborative Innovation Center of Hematology; Soochow University; Suzhou China
| | - W. Ouyang
- Jiangsu Institute of Hematology; Key Laboratory of Thrombosis and Hemostasis/Ministry of Health; The First Affiliated Hospital of Soochow University; Suzhou China
- Collaborative Innovation Center of Hematology; Soochow University; Suzhou China
| | - F. Hu
- Jiangsu Institute of Hematology; Key Laboratory of Thrombosis and Hemostasis/Ministry of Health; The First Affiliated Hospital of Soochow University; Suzhou China
- Collaborative Innovation Center of Hematology; Soochow University; Suzhou China
| | - P. Zhang
- Jiangsu Institute of Hematology; Key Laboratory of Thrombosis and Hemostasis/Ministry of Health; The First Affiliated Hospital of Soochow University; Suzhou China
- Collaborative Innovation Center of Hematology; Soochow University; Suzhou China
| | - X. Bai
- Jiangsu Institute of Hematology; Key Laboratory of Thrombosis and Hemostasis/Ministry of Health; The First Affiliated Hospital of Soochow University; Suzhou China
- Collaborative Innovation Center of Hematology; Soochow University; Suzhou China
| | - C. Ruan
- Jiangsu Institute of Hematology; Key Laboratory of Thrombosis and Hemostasis/Ministry of Health; The First Affiliated Hospital of Soochow University; Suzhou China
- Collaborative Innovation Center of Hematology; Soochow University; Suzhou China
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10
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Haque T, Chen H, Ouyang W, Martoni C, Lawuyi B, Urbanska AM, Urbanska A, Prakash S. Investigation of a New Microcapsule Membrane Combining Alginate, Chitosan, Polyethylene Glycol and Poly-L-Lysine for Cell Transplantation Applications. Int J Artif Organs 2018; 28:631-7. [PMID: 16015573 DOI: 10.1177/039139880502800612] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Microencapsulation of living cells may serve as an alternative therapy for patients requiring organ transplants. One of the limiting factors in the progress of such therapy is attaining a biocompatible and mechanically stable polymer. The current study investigates the potential of a novel membrane combining alginate, chitosan, polyethylene glycol (PEG) and poly-L-lysine (PLL) with the objective of proposing a membrane suitable for cell entrapment that may overcome some of the shortcomings of the widely studied alginate-poly-L-lysine-alginate (APA) capsules. The novel microcapsule was formulated using a 1.5% alginate solution coated with 0.05% chitosan, 0.1% PEG and 0.05% poly-L-lysine with a final layer of 0.1% alginate. Microcapsules having a diameter of 450 ± 30 μm were prepared. Upon citrate treatment, the membrane remained intact and retained its spherical structure. The membrane was able to support liver cell proliferation and the encapsulated cells were capable of secreting proteins. The study demonstrated that the new membrane can be used for cell entrapment. However, further investigations are needed to assess its potential for long term transplantation and usage in the development of bioartificial organs.
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Affiliation(s)
- T Haque
- Biomedical Technology and Cell Therapy Research Laboratory, Department of Biomedical Engineering, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
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Moyat M, Bouzourene H, Ouyang W, Iovanna J, Renauld JC, Velin D. IL-22-induced antimicrobial peptides are key determinants of mucosal vaccine-induced protection against H. pylori in mice. Mucosal Immunol 2017; 10:271-281. [PMID: 27143303 DOI: 10.1038/mi.2016.38] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 03/16/2016] [Indexed: 02/06/2023]
Abstract
Despite the recent description of the mucosal vaccine-induced reduction of Helicobacter pylori natural infection in a phase 3 clinical trial, the absence of immune correlates of protection slows the final development of the vaccine. In this study, we evaluated the role of interleukin (IL)-22 in mucosal vaccine-induced protection. Gastric IL-22 levels were increased in mice intranasally immunized with urease+cholera toxin and challenged with H. felis, as compared with controls. Flow cytometry analysis showed that a peak of CD4+IL-22+IL-17+ T cells infiltrating the gastric mucosa occurred in immunized mice in contrast to control mice. The inhibition of the IL-22 biological activity prevented the vaccine-induced reduction of H. pylori infection. Remarkably, anti-microbial peptides (AMPs) extracted from the stomachs of vaccinated mice, but not from the stomachs of non-immunized or immunized mice, injected with anti-IL-22 antibodies efficiently killed H. pylori in vitro. Finally, H. pylori infection in vaccinated RegIIIβ-deficient mice was not reduced as efficiently as in wild-type mice. These results demonstrate that IL-22 has a critical role in vaccine-induced protection, by promoting the expression of AMPs, such as RegIIIβ, capable of killing Helicobacter. Therefore, it can be concluded that urease-specific memory Th17/Th22 cells could constitute immune correlates of vaccine protection in humans.
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Affiliation(s)
- M Moyat
- Service of Gastroenterology and Hepatology, Department of Medicine, Lausanne University Hospital, Lausanne, Switzerland
| | - H Bouzourene
- UNISciences, University of Lausanne, UniLabs, Lausanne, Switzerland
| | - W Ouyang
- Department of Immunology, Genentech, South San Francisco, California, USA
| | - J Iovanna
- Centre de Recherche en Cancérologie de Marseille (CRCM), INSERM U1068, CNRS UMR 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, France
| | - J-C Renauld
- Ludwig Institute for Cancer Research, Brussels Branch, Brussels, Belgium
| | - D Velin
- Service of Gastroenterology and Hepatology, Department of Medicine, Lausanne University Hospital, Lausanne, Switzerland
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Luo A, Xie W, Luo J, Ouyang W. Public Perception of Cadaver Organ Donation in Hunan Province, China. Transplant Proc 2016; 48:2571-2576. [DOI: 10.1016/j.transproceed.2016.07.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 06/23/2016] [Accepted: 07/05/2016] [Indexed: 10/20/2022]
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13
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Yu X, Zhai Z, Yan J, Ouyang W. Abstract PR579. Anesth Analg 2016. [DOI: 10.1213/01.ane.0000492960.70010.e3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Abstract
System lupus erythematosus (SLE) is an autoimmune disease with multicellular pathogeneic components.Recent studiessuggestan importantrole for interferon-a (IFN) in the immunopathogenesis of SLE. Data demonstrating a correlationbetween IFN-a and SLE disease severity range from elevated IFN-a levels in patients’serum and induction of IFN-regulated genes in peripheral blood mononuclear cells, to drug induced lupus disease in hepatitis C or cancer patients treated with recombinant IFN-a. In addition, mouse models of lupus in which the IFNR is deleted fail to develop disease manifestations. Thus, targetingIFN-a promises to be therapeuticallyefficacious for SLE.
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Affiliation(s)
- K N Schmidt
- Department of Immunology, Genentech Inc., San Francisco 94080, USA.
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Hedskog C, Dvory-Sobol H, Gontcharova V, Martin R, Ouyang W, Han B, Gane EJ, Brainard D, Hyland RH, Miller MD, Mo H, Svarovskaia E. Evolution of the HCV viral population from a patient with S282T detected at relapse after sofosbuvir monotherapy. J Viral Hepat 2015; 22:871-81. [PMID: 25784085 DOI: 10.1111/jvh.12405] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 02/06/2015] [Indexed: 12/12/2022]
Abstract
Clinical phase II/III studies of the nucleotide analogue HCV NS5B inhibitor sofosbuvir (SOF) have demonstrated high efficacy in HCV-infected patients in combination therapy. To date, resistance to SOF (S282T in NS5B) has rarely been detected in patients. In this study, we investigated the evolution of S282T viral variants detected in one HCV genotype 2b-infected patient who relapsed following 12 weeks of SOF monotherapy. Deep sequencing of the NS5B gene was performed on longitudinal plasma samples at baseline, days 2 and 3 on SOF, and longitudinal samples post-SOF treatment through week 48. Intrapatient HCV evolution was analysed by maximum-likelihood phylogenetic analysis. Deep sequencing analysis revealed a low level pre-existence of S282T at 0.05% of viral sequences (4/7755 reads) at baseline and 0.03% (6/23 415 reads) at day 2 on SOF. Viral relapse was detected at week 4 post-treatment where 99.8% of the viral population harboured S282T. Follow-up analysis determined that S282T levels diminished post-treatment reaching undetectable levels 24-48 weeks post-SOF. Phylogenetic analysis together with the persistence of unique post-treatment mutations in all post-SOF samples suggested that growth of wild type resulted from reversion of the S282T mutant to a wild type and not outgrowth of the baseline wild-type population. Our data suggest that a very low level of pre-existing S282T at baseline in this patient was enriched and transiently detected following SOF monotherapy. Despite relapse with drug resistance to SOF, this patient was successfully retreated with SOF plus ribavirin for 12 weeks and is now cured from HCV infection.
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Affiliation(s)
- C Hedskog
- Gilead Sciences Inc., Foster City, CA, USA
| | | | | | - R Martin
- Gilead Sciences Inc., Foster City, CA, USA
| | - W Ouyang
- Gilead Sciences Inc., Foster City, CA, USA
| | - B Han
- Gilead Sciences Inc., Foster City, CA, USA
| | - E J Gane
- New Zealand Liver Transplant Unit, Auckland City Hospital, Auckland, New Zealand
| | - D Brainard
- Gilead Sciences Inc., Foster City, CA, USA
| | - R H Hyland
- Gilead Sciences Inc., Foster City, CA, USA
| | - M D Miller
- Gilead Sciences Inc., Foster City, CA, USA
| | - H Mo
- Gilead Sciences Inc., Foster City, CA, USA
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Purtell K, Gingrich KJ, Ouyang W, Herold KF, Hemmings HC. Activity-dependent depression of neuronal sodium channels by the general anaesthetic isoflurane. Br J Anaesth 2015; 115:112-21. [PMID: 26089447 DOI: 10.1093/bja/aev203] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The mechanisms by which volatile anaesthetics such as isoflurane alter neuronal function are poorly understood, in particular their presynaptic mechanisms. Presynaptic voltage-gated sodium channels (Na(v)) have been implicated as a target for anaesthetic inhibition of neurotransmitter release. We hypothesize that state-dependent interactions of isoflurane with Na(v) lead to increased inhibition of Na(+) current (I(Na)) during periods of high-frequency neuronal activity. METHODS The electrophysiological effects of isoflurane, at concentrations equivalent to those used clinically, were measured on recombinant brain-type Na(v)1.2 expressed in ND7/23 neuroblastoma cells and on endogenous Na(v) in isolated rat neurohypophysial nerve terminals. Rate constants determined from experiments on the recombinant channel were used in a simple model of Na(v) gating. RESULTS At resting membrane potentials, isoflurane depressed peak I(Na) and shifted steady-state inactivation in a hyperpolarizing direction. After membrane depolarization, isoflurane accelerated entry (τ(control)=0.36 [0.03] ms compared with τ(isoflurane)=0.33 [0.05] ms, P<0.05) and slowed recovery (τ(control)=6.9 [1.1] ms compared with τ(isoflurane)=9.0 [1.9] ms, P<0.005) from apparent fast inactivation, resulting in enhanced depression of I(Na), during high-frequency stimulation of both recombinant and endogenous nerve terminal Na(v). A simple model of Na(v) gating involving stabilisation of fast inactivation, accounts for this novel form of activity-dependent block. CONCLUSIONS Isoflurane stabilises the fast-inactivated state of neuronal Na(v) leading to greater depression of I(Na) during high-frequency stimulation, consistent with enhanced inhibition of fast firing neurones.
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Affiliation(s)
- K Purtell
- Department of Pharmacology, Weill Cornell Medical College, New York, NY 10065, USA
| | - K J Gingrich
- Department of Anesthesiology, University of Texas Southwestern Medical Center, Dallas, TX 75235, USA
| | - W Ouyang
- Department of Anesthesiology, Weill Cornell Medical College, New York, NY 10065, USA Present address: College of Physical Education and Health Sciences, Zhejiang Normal University, Jinhua, Zhejiang, China
| | - K F Herold
- Department of Anesthesiology, Weill Cornell Medical College, New York, NY 10065, USA
| | - H C Hemmings
- Department of Pharmacology, Weill Cornell Medical College, New York, NY 10065, USA Department of Anesthesiology, Weill Cornell Medical College, New York, NY 10065, USA
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Feng HJ, Ouyang W, Liu JH, Sun YG, Hu R, Huang LH, Xian JL, Jing CF, Zhou MJ. Global microRNA profiles and signaling pathways in the development of cardiac hypertrophy. ACTA ACUST UNITED AC 2014; 47:361-8. [PMID: 24728214 PMCID: PMC4075303 DOI: 10.1590/1414-431x20142937] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Accepted: 01/21/2014] [Indexed: 11/22/2022]
Abstract
Hypertrophy is a major predictor of progressive heart disease and has an adverse
prognosis. MicroRNAs (miRNAs) that accumulate during the course of cardiac
hypertrophy may participate in the process. However, the nature of any interaction
between a hypertrophy-specific signaling pathway and aberrant expression of miRNAs
remains unclear. In this study, Spague Dawley male rats were treated with transverse
aortic constriction (TAC) surgery to mimic pathological hypertrophy. Hearts were
isolated from TAC and sham operated rats (n=5 for each group at 5, 10, 15, and 20
days after surgery) for miRNA microarray assay. The miRNAs dysexpressed during
hypertrophy were further analyzed using a combination of bioinformatics algorithms in
order to predict possible targets. Increased expression of the target genes
identified in diverse signaling pathways was also analyzed. Two sets of miRNAs were
identified, showing different expression patterns during hypertrophy. Bioinformatics
analysis suggested the miRNAs may regulate multiple hypertrophy-specific signaling
pathways by targeting the member genes and the interaction of miRNA and mRNA might
form a network that leads to cardiac hypertrophy. In addition, the multifold changes
in several miRNAs suggested that upregulation of rno-miR-331*, rno-miR-3596b,
rno-miR-3557-5p and downregulation of rno-miR-10a, miR-221, miR-190, miR-451 could be
seen as biomarkers of prognosis in clinical therapy of heart failure. This study
described, for the first time, a potential mechanism of cardiac hypertrophy involving
multiple signaling pathways that control up- and downregulation of miRNAs. It
represents a first step in the systematic discovery of miRNA function in
cardiovascular hypertrophy.
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Affiliation(s)
- H J Feng
- Zhujiang Hospital, Department of Nuclear Medicine, Southern Medical University, Guangzhou, China
| | - W Ouyang
- Zhujiang Hospital, Department of Nuclear Medicine, Southern Medical University, Guangzhou, China
| | - J H Liu
- Zhujiang Hospital, Department of Nuclear Medicine, Southern Medical University, Guangzhou, China
| | - Y G Sun
- Zhujiang Hospital, Department of Nuclear Medicine, Southern Medical University, Guangzhou, China
| | - R Hu
- Zhujiang Hospital, Department of Nuclear Medicine, Southern Medical University, Guangzhou, China
| | - L H Huang
- Zhujiang Hospital, Department of Nuclear Medicine, Southern Medical University, Guangzhou, China
| | - J L Xian
- Zhujiang Hospital, Department of Nuclear Medicine, Southern Medical University, Guangzhou, China
| | - C F Jing
- National Engineering Research Center, South China Sea Marine Biotechnology, Sun Yat-Sen University, Guangzhou, China
| | - M J Zhou
- National Engineering Research Center, South China Sea Marine Biotechnology, Sun Yat-Sen University, Guangzhou, China
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18
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Lu B, Su S, Hu Y, Ouyang W, Ma Z, Li Q, Li H, Geng Y. Concurrent Chemoradiation Therapy for Stage IV Non-Small Cell Lung Cancer: Results of a Prospective, Single-Center Study. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Su S, Lu B, Ouyang W, Li Q, Hu Y, Ma Z, Li H. The Role of Thoracic 3-Dimensional Radiation Therapy for Non-Small Cell Lung Cancer Patients With Bone Oligometastases. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Gong L, Dong C, Ouyang W, Qin Q. Regulatory T cells: A possible promising approach to cancer recurrence induced by morphine. Med Hypotheses 2013; 80:308-10. [DOI: 10.1016/j.mehy.2012.12.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Accepted: 12/07/2012] [Indexed: 11/24/2022]
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Wang SY, Duan KM, Li Y, Mei Y, Sheng H, Liu H, Mei X, Ouyang W, Zhou HH, Liu ZQ. Effect of quercetin on P-glycoprotein transport ability in Chinese healthy subjects. Eur J Clin Nutr 2013; 67:390-4. [DOI: 10.1038/ejcn.2013.5] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Zuo Z, Ouyang W, Li J, Costa M, Huang C. Cyclooxygenase-2 (COX-2) mediates arsenite inhibition of UVB-induced cellular apoptosis in mouse epidermal Cl41 cells. Curr Cancer Drug Targets 2012; 12:607-16. [PMID: 22463588 DOI: 10.2174/156800912801784802] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 02/24/2012] [Accepted: 02/24/2012] [Indexed: 12/29/2022]
Abstract
Inorganic arsenic is an environmental human carcinogen, and has been shown to act as a co-carcinogen with solar ultraviolet (UV) radiation in mouse skin tumor induction even at low concentrations. However, the precise mechanism of its co-carcinogenic action is largely unknown. Apoptosis plays an essential role as a protective mechanism against neoplastic development in the organism by eliminating genetically damaged cells. Thus, suppression of apoptosis is thought to contribute to carcinogenesis. It is known that cyclooxygenase-2 (COX-2) can promote carcinogenesis by inhibiting cell apoptosis under stress conditions; and our current studies investigated the potential contribution of COX-2 to the inhibitory effect of arsenite in UV-induced cell apoptosis in mouse epidermal Cl41 cells. We found that treatment of cells with low concentration (5 μM) arsenite attenuated cellular apoptosis upon UVB radiation accompanied with a coinductive effect on COX-2 expression and nuclear factor-κB (NFκB) transactivation. Our results also showed that the COX-2 induction by arsenite and UVB depended on an NFκB pathway because COX-2 co-induction could be attenuated in either p65-deficient or p50-deficient cells. Moreover, UVB-induced cell apoptosis could be dramatically reduced by the introduction of exogenous COX-2 expression, whereas the inhibitory effect of arsenite on UVB-induced cell apoptosis could be impaired in COX-2 knockdown C141 cells. Our results indicated that COX-2 mediated the anti-apoptotic effect of arsenite in UVB radiation through an NFκB-dependent pathway. Given the importance of apoptosis evasion during carcinogenesis, we anticipated that COX-2 induction might be at least partially responsible for the co-carcinogenic effect of arsenite on UVB-induced skin carcinogenesis.
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Affiliation(s)
- Z Zuo
- Nelson Institute of Environmental Medicine, New York University School of Medicine, Tuxedo, 10987, USA
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Choi S, McAleer J, Zheng M, DeLeo F, Ouyang W, Hooper L, Qin S, Reinhart T, Kolls J. Acute alcohol inhibits STAT3 induction of Reg3γ in MRSA pneumonia. Alcohol 2012. [DOI: 10.1016/j.alcohol.2011.09.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Cox JH, Kljavin NM, Ota N, Leonard J, Roose-Girma M, Diehl L, Ouyang W, Ghilardi N. Opposing consequences of IL-23 signaling mediated by innate and adaptive cells in chemically induced colitis in mice. Mucosal Immunol 2012; 5:99-109. [PMID: 22089030 DOI: 10.1038/mi.2011.54] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The interleukin-23 (IL-23) pathway has emerged as a promising therapeutic target for inflammatory bowel disease. Although the pathogenic role of IL-23 receptor (IL-23R) on T lymphocytes is well established, its function on innate immune cells has not been thoroughly examined. Here we investigate the consequence of IL-23R deletion in dextran sulfate sodium (DSS)-induced colitis. In IL23R(-/-) and IL23p19(-/-) mice, we observed decreased weight loss and reduced leukocyte infiltrate following DSS exposure. Surprisingly, when the IL-23R(-/-) allele was crossed into Rag2(-/-) mice, we observed exacerbated disease, increased epithelial damage, reduced pSTAT3 in the epithelium, and delayed recovery of IL23R(-/-)Rag2(-/-) mice. This phenotype was rescued with exogenous IL22-Fc, and epithelial pSTAT3 was restored. Depletion of Thy1(+) innate lymphoid cells eliminated the majority of IL-22 production in the colon lamina propria of DSS-treated Rag2(-/-) mice, suggesting that these are the major IL-23 responsive innate cells in this context. In summary, we provide evidence for opposing consequences of IL-23R on innate and adaptive lymphoid cells in murine colitis.
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Affiliation(s)
- J H Cox
- Department of Molecular Biology, Genentech, South San Francisco, California, USA
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25
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Song K, Li Y, Ouyang W, Hao F, Wei X. Manure Nutrients of Pig Excreta Relative to the Capacity of Cropland to Assimilate Nutrients in China. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.proenv.2012.01.178] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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26
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Rao J, Ji X, Ouyang W, Zhao X, Lai X. Dilemma Analysis of China Agricultural Non-point Source Pollution Based on Peasants’ Household Surveys. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.proenv.2012.01.206] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Xu Y, Li Y, Ouyang W, Hao F, Ding Z, Wang D. The impact of long-term agricultural development on the wetlands landscape pattern in Sanjiang Plain. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.proenv.2012.01.186] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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28
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Corneth O, Mus AM, Asmawidjaja P, Ouyang W, Kil L, Hendriks R, Lubberts E. Impaired B cell immunity in IL-22 knock-out mice in collagen induced arthritis. Ann Rheum Dis 2011. [DOI: 10.1136/ard.2010.149005.3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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29
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Müller M, Ouyang W, Kessler B. Dichroic ATR-FTIR spectroscopy on oriented α-helical poly(l-lysine) multilayered with polyanions. Spectrochim Acta A Mol Biomol Spectrosc 2010; 77:709-716. [PMID: 20833103 DOI: 10.1016/j.saa.2010.05.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Revised: 05/21/2010] [Accepted: 05/24/2010] [Indexed: 05/29/2023]
Abstract
The preparation and spectroscopic and microscopic characterization of oriented polyelectrolyte multilayers (PEM) interesting for defined nanostructured functional materials and surfaces are reviewed. Oriented PEM were generated by consecutively adsorbing α-helical poly(l-lysine) (PLL) and oppositely charged polyanions like poly(vinylsulfate) (PVS) or poly(styrene sulfonate) (PSS) at silicon substrates texturized by parallel nanoscopic surface grooves, respectively. Dichroic Attenuated Total Reflexion Fourier Transform Infrared (ATR-FTIR) spectroscopy was used to study the conformation and macromolecular order of stiff polyelectrolytes within PEM. High order parameters up to S=0.82 (S=1 for high, S=0 for low order) were obtained from the dichroic ratios of the Amide I and Amide II bands suggesting a significant alignment of charged α-helical polypeptides in PEM. For PEM consisting of PLL/polyanion the S values significantly increased with increasing molecular weight of PLL and with decreasing molecular weight of the polyanion. These spectroscopic findings were supported by SFM images on PEM-PLL/PVS with high molecular PLL and PEM-PLL/PSS with low molecular PSS, which both showed anisotropically oriented worm-like structures, while PEM-PLL/PVS with low molecular PLL and PEM-PLL/PSS with high molecular PSS showed no orientation features.
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Affiliation(s)
- M Müller
- Leibniz Institute of Polymer Research Dresden e.V. (IPF), Hohe Strasse 6, D-01069 Dresden, Germany.
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Zhou Y, Xia L, He ZS, Ouyang W, Z H, Xie CH. Modulation of matrix metalloproteinase-9 and tissue inhibitor of metalloproteinase-1 in RAW264.7 cells by irradiation. Mol Med Rep 2010; 3:809-13. [PMID: 21472318 DOI: 10.3892/mmr.2010.326] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Accepted: 06/02/2010] [Indexed: 11/05/2022] Open
Abstract
Radiation-induced pulmonary injury is a severe complication affecting the quality of life of patients. Although the pathophysiology of the process is not fully understood, we hypothesized that it is potentially related to macrophages and their secretion of matrix metalloproteinase-9 (MMP-9). Macrophages are a type of inflammatory cell that synthesize hundreds of bioactive substances and enzymes. MMP-9 is closely involved in the maintenance of the basilar membrane, and leads to increased extracellular matrix deposition within the lung, which is a characteristic feature of radiation-induced lung fibrosis. We examined the role of ionizing radiation in modulating the production of MMP-9 in a macrophage cell line. RAW264.7 cells were irradiated with various doses of γ-rays, and then MMP-9 and tissue inhibitor of metalloproteinase-1 (TIMP-1) levels were determined at several time points. RT-PCR revealed a marked increase in the levels of MMP-9 mRNA, which peaked at 24 h post-irradiation and had begun to decline by 48 h. By contrast, TIMP-1 mRNA experienced only a slight increase at 24 h post-irradiation, reaching significance at 48 h post-irradiation. Western blot analysis demonstrated an increased expression of MMP-9 protein in the irradiated cells, while TIMP-1 protein levels were not notably changed. Dexamethasone inhibited the increased expression of MMP-9 protein induced by ionizing radiation. These results indicate that MMP-9 expression by RAW264.7 cells, and an imbalance between MMP-9 and TIMP-1, may be involved in radiation-induced lung injury.
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Affiliation(s)
- Y Zhou
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Hubei 430071, P.R. China
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31
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Hu Y, Ouyang W, Wu F, Cao CH, Wang K, Liao ZK, Zhong YH, Zhou FX, Liu SQ, Xia L, Zhou YF, Xie CH. Enhanced radiosensitivity of SW480 cells via TRAIL up-regulation mediated by Egr-1 promoter. Oncol Rep 2009; 22:765-71. [PMID: 19724854 DOI: 10.3892/or_00000498] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Radiosensitization of cancer cells to irradiation could improve the efficacy of radiotherapy. The early transcriptional factor (Egr-1) promoter induced expression of downstream genes after irradiation. TNF-related apoptosis-inducing ligand (TRAIL) is known to induce apoptosis in malignant cells, but displayed little or no toxicity on normal cells. In this study, we constructed pcDNA3.1-Egr-1-TRAIL (pEgr.1-TRAIL) recombinant plasmid and evaluated its effect on human colon cancer cell line SW480. pEgr.1-TRAIL transfection combined with radiotherapy caused dramatically elevation of TRAIL expression both in mRNA and protein levels, much lower radiobiological parameters in clonogenic assays, accompanied by remarkably increase in apoptosis ratio. Furthermore, pEgr.1-TRAIL transfected cells displayed higher proportion in G0/G1 phase. Our results suggested that pEgr.1-TRAIL can sensitize SW480 cells to radiation, and the radiosensitization is related to cell cycle changes and apoptosis mediated by up-regulation of TRAIL expression. These findings support the potential future application of genetic radiotherapy against carcinoma.
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Affiliation(s)
- Y Hu
- Department of Radiation and Medical Oncology, Wuhan University, Wuhan, 430071, P.R. China
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Abstract
In-situ ATR FTIR spectroscopy was used to study protein adsorption at polyelectrolyte multilayers (PEM). PEM were fabricated by consecutively adsorbing poly(ethyleneimine) (PEI) and poly(acrylic acid) (PAC) analogously to the technique introduced by Decher at silicon internal reflection elements in an in-situ ATR cell. The thickness of PEM of PEI/PAC could be varied by pH value, concentration and number of adsorption steps. At this PEM system adsorption of human serum albumin was studied under electrostatically attractive conditions in dependence of the thickness. Evidence was found, that HSA was predominantly bound in the uncompensated outermost layer region rather than in the bulk phase of the PEM.
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Abstract
Recent studies in infectious disease and autoimmune disease models have revealed that interleukin (IL)-22 might have both proinflammatory and anti-inflammatory functions. There is, however, lack of evidence for IL-22 directly repressing immune responses of leukocytes. We propose that IL-22 promotes innate immunity of tissues, as well as repairing and healing mechanisms during inflammation. Consequently, the restoration of tissue homeostasis helps to attenuate the inflammatory responses involving various immune cells.
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Affiliation(s)
- W Ouyang
- Department of Immunology, South San Francisco, California, USA.
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Müller M, Ouyang W, Starchenko V, Keßler B. Polyelektrolytkomplex-Nanopartikel mit enger Größenverteilung: Präparation und Proteinbindung. CHEM-ING-TECH 2007. [DOI: 10.1002/cite.200750048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abstract
Oral administration of microcapsules containing live bacterial cells has potential as an alternative therapy for several diseases. This article evaluates the suitability of the alginate-poly-L-lysine-alginate (APA) microcapsules for oral delivery of live bacterial cells, in-vitro, using a dynamic simulated human gastro-intestinal (GI) model. Results showed that the APA microcapsules were morphologically stable in the simulated stomach conditions, but did not retain their structural integrity after a 3-day exposure in simulated human GI media. The microbial populations of the tested bacterial cells and the activities of the tested enzymes in the simulated human GI suspension were not substantially altered by the presence of the APA microcapsules, suggesting that there were no significant adverse effects of oral administration of the APA microcapsules on the flora of the human gastrointestinal tract. When the APA microcapsules containing Lactobacillus plantarum 80 (LP80) were challenged in the simulated gastric medium (pH = 2.0), 80.0% of the encapsulated cells remained viable after a 5-min incubation; however, the viability decreased considerably (8.3%) after 15 min and dropped to 2.6% after 30 min and lower than 0.2% after 60 min, indicating the limitations of the currently obtainable APA membrane for oral delivery of live bacteria. Further in-vivo studies are required before conclusions can be made concerning the inadequacy of APA microcapsules for oral delivery of live bacterial cells.
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Affiliation(s)
- H Chen
- Biomedical Technology and Cell Therapy Research Laboratory, Department of Biomedical Engineering and Physiology, Artificial Cells and Organs Research Centre, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
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Abbas AR, Baldwin D, Ma Y, Ouyang W, Gurney A, Martin F, Fong S, van Lookeren Campagne M, Godowski P, Williams PM, Chan AC, Clark HF. Immune response in silico (IRIS): immune-specific genes identified from a compendium of microarray expression data. Genes Immun 2005; 6:319-31. [PMID: 15789058 DOI: 10.1038/sj.gene.6364173] [Citation(s) in RCA: 286] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Immune cell-specific expression is one indication of the importance of a gene's role in the immune response. We have compiled a compendium of microarray expression data for virtually all human genes from six key immune cell types and their activated and differentiated states. Immune Response In Silico (IRIS) is a collection of genes that have been selected for specific expression in immune cells. The expression pattern of IRIS genes recapitulates the phylogeny of immune cells in terms of the lineages of their differentiation. Gene Ontology assignments for IRIS genes reveal significant involvement in inflammation and immunity. Genes encoding CD antigens, cytokines, integrins and many other gene families playing key roles in the immune response are highly represented. IRIS also includes proteins of unknown function and expressed sequence tags that may not represent genes. The predicted cellular localization of IRIS proteins is evenly distributed between cell surface and intracellular compartments, indicating that immune specificity is important at many points in the signaling pathways of the immune response. IRIS provides a resource for further investigation into the function of the immune system and immune diseases.
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Affiliation(s)
- A R Abbas
- Department of Bioinformatics, Genentech, Inc., South San Francisco, CA 94080, USA
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Müller M, Reihs T, Ouyang W. Needlelike and spherical polyelectrolyte complex nanoparticles of poly(l-lysine) and copolymers of maleic acid. Langmuir 2005; 21:465-469. [PMID: 15620340 DOI: 10.1021/la0483257] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We report on the bulk and surface properties of dispersions consisting of nonstoichiometric polyelectrolyte complex (PEC) nanoparticles. PEC nanoparticles were prepared by mixing poly(l-lysine) (PLL) or poly(diallyldimethylammonium chloride) (PDADMAC) with poly(maleic acid-co-alpha-methylstyrene) (PMA-MS) or poly(maleic acid-co-propylene) (PMA-P). The monomolar mixing ratio was n-/n+ = 0.6, and the concentration ranged from 1 to 6 mmol/L. Subsequent centrifugation enabled the separation of the excess polycation, resulting in a stable coacervate phase further used in the experiments. The bulk phase parameters turbidity and hydrodynamic radius (R(h)) of the PEC nanoparticles showed a linear dependence on the total polymer content independently of the mixed polyelectrolytes. This can be interpreted by the increased collision probability of the polyelectrolyte chains when the overlap concentration is approached or exceeded. Different morphologies of the cationic PEC nanoparticles, which were solution-cast onto Si supports, were obtained by atomic force microscopy (AFM). The combinations of PLL/PMA-MS and PDADMAC/PMA-MS revealed more or less hemispherical particle shapes, whereas that of PLL/PMA-P revealed an elongated needlelike particle shape. Circular dichroism and attenuated total reflection Fourier transform infrared (ATR-FTIR) measurements proved the alpha-helical conformation for the PEC PLL/PMA-P and the random coil conformation for the PEC PLL/PMA-MS. We conclude that stiff alpha-helical PLL induces anisotropic elongated PEC nanoparticles, whereas randomly coiled PLL forms isotropic spherical PEC nanoparticles.
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Affiliation(s)
- M Müller
- Leibniz Institute of Polymer Research Dresden, Hohe Str. 6, D-01069 Dresden, Germany.
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Jones ML, Martoni C, Chen H, Ouyang W, Metz T, Prakash S. Deconjugation of bile acids with immobilized genetically engineeredLactobacillus plantarum80 (pCBH1). Appl Bionics Biomech 2005. [DOI: 10.1533/abbi.2004.0018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Qiu H, Zhu H, Ouyang W, Wang Z, Sun H. Clinical effects and mechanism of chanlibao in accelerating second stage of labor. J Tongji Med Univ 2003; 19:141-4. [PMID: 12840859 DOI: 10.1007/bf02886896] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To observe the clinical effects and the mechanism of Chanlibao (CLB, a preparation of Chinese herbal medicine) in accelerating second stage of labor, primiparae were divided into 3 groups at random. CLB or oxytocin (OTC) was given to the CLB group (n = 80) and the OTC group (n = 52) respectively. The third group served as controls (n = 29). The control group consisted of women experiencing natural labor and to whom no drug was given. The time of second stage of labor and prognosis of mother and newborn of different groups were observed and compared. And intrauterine pressure and fetal heart rate were monitored by means of electronic monitoring. Isolated uterine muscular tissue was used to observe the reactivity to CLB. The results showed that the time of second stage of labor and postpartum hemorrhage in the CLB group were less than those in the control group and the average intrauterine pressure in the former was higher than that in latter, so was the contraction strength of isolated uterine muscle, but with no difference as compared with the OTC group. No side effect of CLB was found. It is concluded that CLB could obviously strengthen uterine contraction and accelerate second stage of labor. Moreover, it is inexpensive, convenient and free of side effect. It can be used as a new, safe and effective alternative for improving prognosis of mother and newborn, especially those not indicated for oxytocin or profuse infusion.
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Affiliation(s)
- H Qiu
- Department of Obstetrics and Gynecology, Xiehe Hospital, Tongji Medical University, Wuhan 430022
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40
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Abstract
The development of naive CD4+ T cells into a T helper (Th) 2 subset capable of producing interleukin (IL)-4, IL-5, and IL-13 involves a signal transducer and activator of transcription (Stat)6-dependent induction of GATA-3 expression, followed by Stat6-independent GATA-3 autoactivation. The friend of GATA (FOG)-1 protein regulates GATA transcription factor activity in several stages of hematopoietic development including erythrocyte and megakaryocyte differentiation, but whether FOG-1 regulates GATA-3 in T cells is uncertain. We show that FOG-1 can repress GATA-3-dependent activation of the IL-5 promoter in T cells. Also, FOG-1 overexpression during primary activation of naive T cells inhibited Th2 development in CD4+ T cells. FOG-1 fully repressed GATA-3-dependent Th2 development and GATA-3 autoactivation, but not Stat6-dependent induction of GATA-3. FOG-1 overexpression repressed development of Th2 cells from naive T cells, but did not reverse the phenotype of fully committed Th2 cells. Thus, FOG-1 may be one factor capable of regulating the Th2 development.
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Affiliation(s)
- M Zhou
- Department of Pathology and Immunology, Department of Medicine, Washington University School of Medicine, 660 S. Euclid Ave., St. Louis, MO 63110, USA
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Zhu H, Yang J, Murphy TL, Ouyang W, Wagner F, Saparov A, Weaver CT, Murphy KM. Unexpected characteristics of the IFN-gamma reporters in nontransformed T cells. J Immunol 2001; 167:855-65. [PMID: 11441092 DOI: 10.4049/jimmunol.167.2.855] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Analysis of the IFN-gamma promoter has primarily been conducted by transient expression of reporter constructs in transformed cells. However, the activity of cis elements may differ when expressed transiently compared with their activity within native chromatin. Furthermore, the transcription factors and signaling mechanisms in transformed cells may differ from those in normal T cells. To analyze IFN-gamma promoter regulation in normal T cells, we developed a novel retroviral bottom-strand reporter system to allow the chromatin integration of promoter regions in primary developing T cells. As controls, both the IL-2 and IL-4 promoters were inducible in this system, with the IL-4 reporter having Th2-specific activity. Strikingly, the IFN-gamma promoter exhibited constitutive activity in both Th1 and Th2 subsets, in contrast to the behavior of the endogenous IFN-gamma gene, which is inducible only in Th1 cells. In mapping this activity, we found that the AP-1/GM-CSF site in the distal promoter element is the most critical element for the constitutive activity. Transgenic reporter lines for the IFN-gamma promoter confirmed the constitutive behavior of the isolated IFN-gamma promoter. This constitutive activity was resistant to inhibition by cyclosporin A and was independent of Stat4 and p38 mitogen-activated protein kinase. These results suggest that IFN-gamma promoter regulation may require cis elements residing either downstream or >3.4 kb upstream of the transcriptional start site, involving repression of constitutive activity.
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Affiliation(s)
- H Zhu
- Department of Pathology and Immunology, Howard Hughes Medical Institute, Washington University School of Medicine, St. Louis, MO 63110, USA
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Murphy KM, Ouyang W, Ranganath S, Murphy TL. Bi-stable transcriptional circuitry and GATA-3 auto-activation in Th2 commitment. Cold Spring Harb Symp Quant Biol 2001; 64:585-8. [PMID: 11232335 DOI: 10.1101/sqb.1999.64.585] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- K M Murphy
- Pathology Department, Washington University School of Medicine, Howard Hughes Medical Institute, St. Louis, Missouri 63110, USA
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Yang J, Zhu H, Murphy TL, Ouyang W, Murphy KM. IL-18-stimulated GADD45 beta required in cytokine-induced, but not TCR-induced, IFN-gamma production. Nat Immunol 2001; 2:157-64. [PMID: 11175814 DOI: 10.1038/84264] [Citation(s) in RCA: 207] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Interleukin-12 (IL-12) and IL-18 induce synergistic transcription of interferon gamma (IFN-gamma) that is T cell receptor (TCR)-independent, not inhibited by cyclosporin A and requires new protein synthesis. To characterize this pathway, we screened for genes that are induced in IL-12- and IL-18-treated T helper type 1 cells. GADD45 beta, which activates mitogen-activated protein kinase (MAPK)-extracellular signal-regulated kinase kinase 4 (MEKK4), was induced by IL-18 and augmented by IL-12. GADD45 beta expression in naïve CD4+ T cells activated p38 MAPK and selectively increased cytokine-induced, but not TCR-induced, IFN-gamma production. Kinase-inactive MEKK4 and inhibition of the p38 MAPK pathway both selectively inhibit cytokine-induced, but not TCR-induced, IFN-gamma production. Thus, the synergy between IL-12 and IL-18 may involve GADD45 beta induction, which can maintain the MEKK4 and p38 MAPK activation that is necessary for cytokine-induced, but not TCR-induced, IFN-gamma production.
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Affiliation(s)
- J Yang
- Department of Pathology and Immunology, Howard Hughes Medical Institute, Washington University School of Medicine, 660 South Euclid Ave., St. Louis, MO 63110, USA
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44
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Abstract
The recognition of polarized T cell subsets defined by cytokine production was followed by a search to define the factors controlling this phenomenon. Suitable in vitro systems allowed the development of cytokine "recipes" that induced rapid polarization of naïve T cells into Th1 or Th2 populations. The next phase of work over the past several years has begun to define the intracellular processes set into motion during Th1/Th2 development, particularly by the strongly polarizing cytokines IL-12 and IL-4. Although somewhat incomplete, what has emerged is a richly detailed tapestry of signaling and transcription, controlling an important T cell developmental switch. In addition several new mediators of control have emerged, including IL-18, the intriguing Th2-selective T1/ST2 product, and heterogeneity in dendritic cells capable of directing cytokine-independent Th development.
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Affiliation(s)
- K M Murphy
- Department of Pathology, and Howard Hughes Medical Institute, Washington University School of Medicine, St. Louis, MO 63110, USA.
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Abstract
The effects of norepinephrine (NE) on the electrophysiological activities of single hypothalamic arcuate neurons were studied using extracellular recording of 385 neurons from 169 brain slices in rats. The results showed that: (1) of 236 neurons selected randomly and tested with NE application, 137 (58.0%) were excited, 67 (28.4%) were inhibited, and 32 (13.6%) failed to respond; (2) substitution of low Ca(2+)-high Mg(2+) artificial cerebrospinal fluid (ACSF) for normal ACSF abolished the NE-induced inhibitory effect but failed to abolish the excitatory effect; (3) both the NE-induced excitatory and inhibitory effects were antagonized partly by phentolamine, prazosin, and propranolol but not by yohimbine; (4) naloxone and glibenclamide, a blocker of adenosine triphosphate-sensitive (K(ATP)) channels, blocked the NE-induced inhibitory effect; and (5) neurons that were inhibited by NE were also inhibited by morphine and cromakalim, an agonist of K(ATP) channels, and moreover, the morphine-induced inhibitory effect could be blocked by glibenclamide, while the cromakalim-induced inhibitory effect was not blocked by naloxone. These results imply that: (a) NE excites arcuate neurons through a mechanism that is insensitive to lowering the extracellular Ca(2+) suggesting a direct postsynaptic response through alpha(1)- and beta-adrenergic receptors, while NE inhibits cells through at least an inhibitory interneuron in arcuate and so is dependent on a Ca(2+)-sensitive presynaptic release mechanism; and (b) the inhibitory interneuron may be opioidergic, being excited first through alpha(1)- and beta-adrenergic receptors, after which the released opioids inhibit the neurons being recorded with an involvement of activation of K(ATP) channels. This possibility needs to be substantiated in much more detail.
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Affiliation(s)
- Y M Kang
- Department of Neurobiology, Shanxi Medical University, Shanxi 030001, Taiyuan, People's Republic of China
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Ouyang W, Li Y, Liu Z. [Effect caused by uptake of different levels of calcium to enamel fluorosis in rats]. Zhonghua Kou Qiang Yi Xue Za Zhi 2000; 35:47-9. [PMID: 11831964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To study the effects caused by uptake of different levels of calcium to dental fluorosis in rats. METHODS Weanling rats were raised on water containing 0.1 mol/L fluoride and food containing low, normal and high levels of calcium for 2 months. The concentration of fluoride in enamel was analysed by F-ion-selective electrode. The microradiographic examination and light-density analysis were performed. The enamel structure was examined under SEM. RESULTS The more calcium was ingested, the lower level of fluoride amount in enamel was observed (P < 0.01). With increasing food calcium ingestion, the light density value was decreasing, and the level of enamel mineralization was increasing (P < 0.01). CONCLUSIONS With increasing food calcium ingestion during the development of teeth, the level of dental fluorosis is decreasing. The calcium supply is effective in protection from fluoride toxicity to a certain extent.
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Affiliation(s)
- W Ouyang
- Research Institute of Stomatology, Beijing Stomatological Hospital, Beijing 100050, China
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47
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Ouyang W, Löhning M, Gao Z, Assenmacher M, Ranganath S, Radbruch A, Murphy KM. Stat6-independent GATA-3 autoactivation directs IL-4-independent Th2 development and commitment. Immunity 2000; 12:27-37. [PMID: 10661403 DOI: 10.1016/s1074-7613(00)80156-9] [Citation(s) in RCA: 530] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The initial source of IL-4-inducing Th2 development and the mechanism of stable Th2 commitment remain obscure. We found the reduced level of IL-4 production in Stat6-deficient T cells to be significantly higher than in Th1 controls. Using a novel cell surface affinity matrix technique, we found that IL-4-secreting Stat6-deficient T cells stably expressed GATA-3 and Th2 phenotype. Introducing GATA-3 into Stat6-deficient T cells completely restored Th2 development, inducing c-Maf, Th2-specific DNase I hypersensitive sites in the IL-4 locus, and Th2 cytokine expression. The fact that GATA-3 fully reconstitutes Th2 development in Stat6-deficient T cells indicates it is a master switch in Th2 development. Finally, GATA-3 exerts Stat6-independent autoactivation, creating a feedback pathway stabilizing Th2 commitment.
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Affiliation(s)
- W Ouyang
- Department of Pathology and Center for Immunology, Howard Hughes Medical Institute, Washington University School of Medicine, St. Louis, Missouri 63110, USA
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48
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Ouyang W, Jacobson NG, Bhattacharya D, Gorham JD, Fenoglio D, Sha WC, Murphy TL, Murphy KM. The Ets transcription factor ERM is Th1-specific and induced by IL-12 through a Stat4-dependent pathway. Proc Natl Acad Sci U S A 1999; 96:3888-93. [PMID: 10097133 PMCID: PMC22390 DOI: 10.1073/pnas.96.7.3888] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Interleukin 12 (IL-12)-induced T helper 1 (Th1) development requires Stat4 activation. However, antigen-activated Th1 cells can produce interferon gamma (IFN-gamma) independently of IL-12 and Stat4 activation. Thus, in differentiated Th1 cells, factors regulated by IL-12 and Stat4 may be involved in IFN-gamma production. Using subtractive cloning, we identified ERM, an Ets transcription factor, to be a Th1-specific, IL-12-induced gene. IL-12-induction of ERM occurred in wild-type and Stat1-deficient, but not Stat4-deficient, T cells, suggesting ERM is Stat4-inducible. Retroviral expression of ERM did not restore IFN-gamma production in Stat4-deficient T cells, but augmented IFN-gamma expression in Stat4-heterozygous T cells. Ets factors frequently regulate transcription via cooperative interactions with other transcription factors, and ERM has been reported to cooperate with c-Jun. However, in the absence of other transcription factors, ERM augmented expression of an IFN-gamma reporter by only 2-fold. Thus, determining the requirement for ERM in Th1 development likely will require gene targeting.
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Affiliation(s)
- W Ouyang
- Department of Pathology and Center for Immunology, Howard Hughes Medical Institute, Washington University School of Medicine, St. Louis, MO 63110, USA
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49
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Murphy KM, Ouyang W, Szabo SJ, Jacobson NG, Guler ML, Gorham JD, Gubler U, Murphy TL. T helper differentiation proceeds through Stat1-dependent, Stat4-dependent and Stat4-independent phases. Curr Top Microbiol Immunol 1999; 238:13-26. [PMID: 10087648 DOI: 10.1007/978-3-662-09709-0_2] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Much of our focus in understanding Th1/Th2 development has been on the signals delivered by IL-12 and IL-4 as final determinants of terminal T cell differentiation. Because extinction of IL-12 signaling in early Th2 development could potentially be important in imprinting a more permanent Th2 phenotype on a population of T cells, we have also examined various parameters regulating the IL-12 signaling pathway. Whereas IL-4 appears to repress functional IL-12 signaling through inhibition of IL-12R beta 2 expression, IFN-gamma in the mouse, and IFN-alpha in the human appear to induce IL-12R beta 2 expression and promote IL-12 responsiveness. We propose that Th1 development can be considered in two stages, capacitance and development. Capacitance would simply involve expression of IL-12R beta 1 and beta 2 subunits, regulated by TCR, IL-4 and IFNs. The second stage, development, we propose is the true IL-12 induced developmental stage, involving expression of Stat4 inducible proteins. In the human, this may also occur via IFN-alpha, which is able to activate Stat4. It is perhaps possible that all of Stat4 actions on Th1 development may be exert directly by Stat4 at the IFN-gamma gene, however we suggest that, more likely, Stat4 may act to induce Th1 development through the induction of other non-cytokine genes, whose stable expression maintains the transcriptional state of a Th1 cell.
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MESH Headings
- Animals
- Antigens, Differentiation, T-Lymphocyte/physiology
- Cell Differentiation
- DNA-Binding Proteins/physiology
- Humans
- Immunologic Factors/metabolism
- Interferon-alpha/physiology
- Interferon-gamma/metabolism
- Interleukin-12/pharmacology
- Interleukin-12/physiology
- Interleukin-4/pharmacology
- Lymphocyte Activation
- Mice
- Mice, Inbred BALB C
- Mice, Inbred DBA
- Mice, Transgenic
- Phenotype
- Receptors, Interleukin/antagonists & inhibitors
- Receptors, Interleukin/metabolism
- Receptors, Interleukin-12
- STAT1 Transcription Factor
- STAT4 Transcription Factor
- Signal Transduction
- T-Lymphocytes, Helper-Inducer/drug effects
- T-Lymphocytes, Helper-Inducer/immunology
- Trans-Activators/physiology
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Affiliation(s)
- K M Murphy
- Howard Hughes Medical Institute, Department of Pathology, Center for Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
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50
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Abstract
IFN-gamma produced by CD4+ T helper 1 (Th1) cells promotes protection against intracellular pathogens. Antigen activation of Th1 cells is an important mode of IFN-gamma induction, but here we analyze a second, antigen-nonspecific pathway capable of inducing full IFN-gamma transcription. IL-12 or IL-18 alone do not induce IFN-gamma mRNA, and only modestly augment antigen-induced IFN-gamma mRNA from Th1 cells. However, IL-12 and IL-18 together fully induce IFN-gamma transcription independently of TCR-activated signals, by a mechanism that does not simply involve Stat4 and NF-kappaB activation, but requires additional protein synthesis. Cyclosporin A inhibits TCR-induced IFN-gamma production, but not IL-12/IL-18-induced IFN-gamma production, biochemically discriminating between these pathways. These results suggest that the two pathways induce IFN-gamma production through functionally segregated but spatially overlapping cis-acting elements, similar to other genes under the control of two or more promoters.
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Affiliation(s)
- J Yang
- Department of Pathology and Center for Immunology, Howard Hughes Medical Institute, Washington University School of Medicine, St. Louis, MO 63110, USA
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