Increased expression of costimulatory markers CD134 and CD80 on interleukin-17 producing T cells in patients with systemic lupus erythematosus
- Sebastian Dolff†1, 2,
- Daniel Quandt†1,
- Benjamin Wilde1,
- Thorsten Feldkamp1,
- Fan Hua1,
- Xin Cai1,
- Christof Specker3,
- Andreas Kribben1,
- Cees GM Kallenberg2 and
- Oliver Witzke1Email author
© Dolff et al.; licensee BioMed Central Ltd. 2010
Received: 24 February 2010
Accepted: 23 July 2010
Published: 23 July 2010
There is growing evidence that interleukin 17 (IL-17) producing T cells are involved in the pathogenesis of systemic lupus erythematosus (SLE). Previous studies showed that increased percentages of T-cell subsets expressing the costimulatory molecules CD80 and CD134 are associated with disease activity and renal involvement in SLE. The aim of this study was to investigate the distribution and phenotypical characteristics of IL-17 producing T-cells in SLE, in particular in patients with lupus nephritis, with emphasis on the expression of CD80 and CD134.
Thirty-four patients (3 male, 31 female, mean age 41 ± 15 years) fulfilling at least four of the American College of Rheumatology (ACR) revised criteria for the diagnosis of SLE and 24 healthy controls were enrolled. T-cells from the peripheral blood were analysed by fluorescence activated cell sorting (FACS) for their expression levels of CD80, CD134 and CCR6. In vitro stimulated CD3+IL17+ cells were also investigated for the expression of these costimulatory markers. Finally, renal biopsies from SLE patients were evaluated for the presence of CD134 expressing T-cells.
Percentages of IL-17 expressing T-cells were significantly increased in patients with active disease as compared to healthy controls (1.46 ± 0.58% versus 0.93 ± 0.30%, P = 0.007). The percentage of IL-17 producing T-cells was correlated with disease activity as assessed by systemic lupus erythematosus disease activity index (SLEDAI) (r = 0.53, P = 0.003). In patients, most of the IL-17 producing T-cells were confined to the CCR6 + T-cell subset (80 ± 13%). Expression of CD80 and CD134 on the IL-17 producing T-cell subset was higher in SLE than in healthy controls (HC) (CD134: 71.78 ± 14.51% versus 51.45 ± 16.58%, P = 0.002; CD80: 25.5 ± 14.99% versus 14.99 ± 5.74%, P = 0.02). Also, patients with lupus nephritis expressed higher levels of CD134 + on CD3+IL-17+ cells as compared to HC (72.69 ± 11.54% versus 51.45 ± 16.58%, P = 0.006). Furthermore, renal biopsies of lupus nephritis patients showed infiltration of CD134+ T cells.
Percentages of IL-17 expressing T-cells correlate with disease activity. Further, these cells show increased expression of costimulatory markers such as CD134 and CD80. The presence of CD134+ T-cells in renal biopsies of lupus nephritis patients suggest that these cells migrate to the kidney and might contribute to inflammatory processes through IL-17 secretion.
Systemic lupus erythematosus (SLE) is a multiorgan autoimmune disease characterized by an imbalanced T cell homeostasis with a shift towards activated effector T-cell subsets. Two major subsets of CD4+ T helper cells, Th1 and Th2, have been shown to be involved in the pathogenesis of SLE. Th1 cells secrete interferon gamma (INF-γ) and are induced by IL-12, whereas Th2 cells secrete IL-4, IL-5 and IL-13 and are induced by IL-4 [1, 2].
More recently, another subset of cytokine producing T-cells, so called Th17 cells producing the cytokine IL-17, were described. IL-17 exerts its function through recruiting neutrophils and monocytes, upregulating local chemokine expression, facilitating T cell migration into tissues, and inducing immune responses [3–6]. There is increasing evidence that IL-17-producing T-cells play an important role in various autoimmune diseases including multiple sclerosis, psoriasis, rheumatoid arthritis, inflammatory bowel disease, ANCA associated vasculitis and systemic lupus erythematosus [7–11].
Recent studies demonstrated the importance of IL-17 produced by different T-cell subsets such as CD4+ T-cells, CD8+ T cells, CD3+CD4-CD8- T-cells, and γδ T-cells in human SLE [12, 13]. Furthermore, Yang et al. reported an association of IL17-producing T-cells and clinical features as disease activity assessed by systemic lupus erythematosus disease activity index (SLEDAI) . Studies investigating the role of IL-17-producing T-cells in the pathogenesis of lupus nephritis (LN) are rare. However, studies in mice support the idea that IL-17 may contribute to renal disease, in particular lupus nephritis [14–17]. Crispin et al. demonstrated infiltration of IL-17+ double negative T-cell in kidneys of lupus nephritis patients . More recently, single-cell analysis of laser-microdissected lupus nephritis sections showed a skewing towards IL-17 . Further evidence comes from urine analysis in lupus nephritis patients where IL-17 gene expression was inversely correlated with disease activity . These studies demonstrated the pivotal role of IL-17 cells in the pathogenesis of lupus nephritis. In humans an overwhelming amount of IL-17 cells express the chemokine receptor CCR6 . Therefore, CCR6 might be a useful phenotypic marker for the analysis of IL-17 T-cells.
Previously, we reported an association of increased levels of costimulatory markers on CD4+ cells with lupus nephritis . Especially, expression of CD134 was associated with disease activity and renal involvement, but a functional analysis of these CD134 expressing cells is still lacking. As a member of the tumour necrosis factor (TNF) superfamily, CD134 (OX40) provides co-stimulatory signals upon ligation to the CD134Ligand. Moreover, it is possible that CD134+ T cells infiltrate kidneys and cause inflammation after ligation with CD134L which has been shown to be present on glomerular endothelial cells in SLE patients . Thus, CD134 might be a pivotal surface marker to enable effector cell migration towards the kidney. The significance of CD134 for effector functions has been shown by the observation that treatment with a stimulatory anti-CD134 antibody enhances T cell expansion and differentiation to effector cells in mice [22, 23]. This stimulation, apparently, promotes the secretion of IFN-γ and the upregulation of various interleukin (IL)-receptors which might lead subsequently to cytokine-mediated kidney cell damage . Remarkably, increased percentages of CD134 expressing T-cells as well as Th17 cells have been found amongst effector cells in several autoimmune diseases such as Wegener's granulomatosis, rheumatoid arthritis and myasthenia gravis [7, 25–28].
To elucidate the role and phenotype of IL-17 producing effector T-cells in patients with systemic lupus erythematosus, in particular with lupus nephritis, we investigated their presence and phenotypic characteristics in the present study. We analysed not only peripheral blood but also tissue from patients with lupus nephritis. We tested the hypothesis that increased expression of costimulatory molecules on these cells may promote their infiltrations into the kidney due to interaction with ligands on resident renal cells.
Materials and methods
Thirty-four patients (3 male, 31 female, mean age 41 ± 15 years) fulfilling at least four of the American College of Rheumatology (ACR) revised criteria for the diagnosis of SLE and 24 healthy controls (mean age 46 ± 14 years) were enrolled in the study. Thirteen patients had lupus nephritis (WHO Class II: two patients, Class III: one patient, Class IV: five patients, Class V: four patients, unclassified: two patients) while 22 patients had no clinical evidence of lupus nephritis (absence of proteinuria and/or glomerular hematuria). Clinical disease activity at the time of measurement was assessed according to the systemic lupus erythematosus disease activity index (SLEDAI) (mean SLEDAI 4 ± 5). Patients with a SLEDAI ≥4 were defined as active; 19 active and 15 inactive patients were included in the study. A total of 26 patients were treated with prednisone (mean 27 ± 91 mg/d), 8 patients did not receive prednisone, and 23 patients were on a constant dose of immunomodulating drugs (azathioprin (n = 8), mycophenolate mofetil (n = 10), cyclosporin A (n = 2), hydroxychloroquin (n = 9), leflunomide (n = 1), rituximab (n = 2)), 2 patients had no medication at the time of the study. Thirteen patients had been treated with cyclophosphamide (mean dose: 2,003 ± 4,193 mg) during their disease course. Consecutive patients were included from the University Hospital of Essen and the Medical Center Essen-Süd. The study protocol was approved by the institutional review board. All patients gave informed consent for participation in this study.
Expression level of the surface molecules on lymphocytes was assessed by four-colour surface staining. Phycoerythrin (PE), fluorenscein isothiocyanate (FITC), peridin chlorophyll protein (PerCP) and Allophycocyanin (APC)-labelled antibodies were used: CD3 (mouse IgG1, PerCP), CD4 (mouse IgG1, PerCP), CD8 (mouse IgG1 FITC), CCR6 (mouse igG1, FITC), CD134 (mouse IgG1, PE), CD80 (mouse IgG1, PE, R&D Systems, Wiesbaden, Germany) and IL-17 (mouse IgG1, APC). All antibodies were purchased from Becton Dickinson, Heidelberg, Germany, except for IL-17, which was purchased from eBioscience, San Diego, CA, USA, and CCR6 purchased from R&D Systems, Minneapolis, MN, USA. Appropriate isotype controls (Becton Dickinson) were used. Briefly, peripheral blood was stained with labelled monoclonal antibodies for 20 minutes in the dark at room temperature. The cell suspension was incubated with lysis buffer for 15 minutes and prepared as indicated. Analysis was performed with a fluorescence activated cell sorter (FACS) Calibur™ from Becton Dickinson.
Immunostaining for intracellular cytokines
Peripheral blood mononuclear cells (PBMCs) of patients were separated by standard Ficoll-Paque density gradient centrifugation. The cells were resuspended in RPMI 1640 medium (Gibco BRL, Karlsruhe, Germany) supplemented with 10% heat inactivated fetal calf serum (Biochrom, Berlin, Germany). The cells were cultured in the absence or presence of PMA (5 ng/ml) and Ionomycin (1 μM) (Sigma-Aldrich, Seelze, Germany) for five hours. Cytokine secretion was inhibited by Brefeldin A (Ebioscience, Frankfurt, Germany). Then surface staining was performed with CD3, CD134, CD80, CCR6 and appropriate isotype controls. Cells were fixed and permeabilized by using a Cytofix/Cytoperm kit purchased from Becton Dickinson. Finally, the samples were intracellulary stained with IL-17 or an appropriate isotype control.
Renal biopsies were provided by the Institute of Pathology University Hospital of Essen. Specimens were fixed in 10% neutral buffered formaline and paraffin-embedded. Sections 5 μm thick were deparaffinized in xylene and rehydrated in a series of ethanol with different concentrations (100%, 95%, 70% and 50%). Citrate buffer pH 6.0 (Zytomed, Berlin, Germany) was applied for heat induced epitope retrieval, followed by neutralization of endogenous peroxidase with 0.3% H2O2. Primary antibodies (CD3 obtained from DCS, Hamburg, Germany and CD134 obtained from Becton Dickinson) and HRP-conjugated secondary antibodies (Zytomed) were incubated on slides (each for 30 minutes) at room temperature. Washing with PBS was performed after each incubation step. A DAB substrate Kit (Zytomed) was used for visualization. Finally, the slides were slightly counterstained with hematoxylin.
Immunofluorescence double staining
Tissues were fixed, embedded in paraffin and sectioned as indicated above. Epitope retrieval was performed with citrate buffer pH 6.0 (Zytomed). Primary antibodies against CD3 (rabbit IgG1, DCS) and CD134 (mouse IgG1, Becton Dickinson) were used and incubated for 60 minutes at room temperature simultaneously. Secondary antibodies conjugated to Cy2 and Cy3 (Dianova, Hamburg) were applied for 30 minutes. Finally, the slides were mounted with Immu Mount™ (Thermo Fisher, Kehl, Germany).
All values are expressed as mean ± SD. Significance for the differences between groups was determined by the Mann-Whitney U-test. Spearman's rank correlation test was applied for detecting correlations between different study parameters. A P-value less than 0.05 was considered significant.
Expression of CCR6 and phenotypic features of CCR6+ peripheral blood CD4+cells
In order to characterise IL-17 producing cells with a suitable marker expressed on the surface we analysed T cells for the expression of CCR6 . Peripheral blood circulating CD4+CCR6+ cells were analysed in 28 patients and 11 healthy individuals. There were no differences in the percentages of CD4+CCR6+ cells between patients with SLE and healthy controls (19.74 ± 8.5% vs. 16.97 ± 5.6%, P = 0.34). Furthermore, there were no significant differences between active (n = 10) and inactive (n = 18) patients (18.63 ± 8.01% vs. 20.36 ± 9.04%, P = 0.46) or between patients with or without lupus nephritis (22.39 ± 8.0% vs. 17.86 ± 8.08%, P = 0.24). There were also no differences in of CCR6 expression between patients with and without lupus nephritis and healthy controls (22.39 ± 8.05% vs. 16.97 ± 5.67% and 17.86 ± 8.08% vs. 16.97 ± 5.67%, P = 0.08 and P = 0.76, respectively). Active and inactive patients showed no difference in levels of CCR6 + cells as compared to healthy controls (18.63 ± 8.01% vs. 16.97 ± 5.67% and 20.36 ± 9.04% vs. 16.97 ± 5.67%, P = 0.6 and P = 0.31, respectively).
The CCR6+ subset was analysed for the expression of costimulatory markers CD80 and CD134. Remarkably, percentages of CD134 and CD80 expressing CCR6 + cells were significantly increased in patients with SLE in comparison to healthy controls (CD134: 67.87 ± 12.23% vs. 59.27 ± 8.18%, P = 0.02; CD80: 26.46 ± 12.28% vs. 13.86 ± 3.82%, P = 0.001).
Expression of costimulatory markers CD134 and CD80 on CD4+CCR6+cells in active and inactive patients and patients with and without lupus nephritis
Patients with and without active disease, as assessed by SLEDAI, and patients with and without lupus nephritis, proven by renal biopsy, were analysed for CD80 expression on CD4+CCR6+ cells. The percentages of CD80 expressing on CD4+CCR6+ cells showed no difference between active and inactive patients (23.58 ± 13.41% vs. 28.06 ± 11.07%, P = 0.37). There was a significant difference between inactive SLE patients and healthy controls (28.06 ± 11.07% vs. 13.86 ± 3.82%, P = 0.0006). Expression of CD80 on CD4+CCR6+ cells in active patients tended to be increased as compared to healthy controls (23.58 ± 13.41% vs. 13.86 ± 3.82%, P = 0.062). Patients with lupus nephritis showed significantly higher levels of CD80 expression on CD4+CCR6+ cells in comparison to healthy controls (22.13 ± 10.58% vs. 18.86 ± 3.82%, P = 0.02). The same applied for patients without lupus nephritis (30.66 ± 12.75% vs. 18.86 ± 3.82%, P = 0.0009). Comparing patients with lupus nephritis and patients without lupus nephritis no difference could be observed (22.13 ± 10.58% vs. 30.66 ± 12.75%, P = 0.11).
Expression of CD134 on CD4+CCR6+ cells was significantly higher in patients with inactive disease compared to healthy controls (70.89 ± 10.35% vs. 59.27 ± 8.18%, P = 0.0097) but not different from active patients (70.89 ± 10.35% vs. 62.14 ± 14.16%, P = 0.17). Patients with lupus nephritis expressed higher levels of CD134 on peripheral blood CD4+ T-cells as compared to HC (68.08 ± 7.52% vs. 59.27 ± 8.18%, P = 0.027). Patients without lupus nephritis showed no difference in comparison to patients with lupus nephritis and healthy individuals (67.75 ± 13.46% vs. 68.08 ± 7.52%, P = 0.91; 67.75 ± 13.46% vs. 59.27 ± 8.18%, P = 0.05).
SLE patients with active disease show increased levels of IL-17 producing T-cells in peripheral blood
Ex vivo IL-17 production of CD3+cells correlates with disease activity and is independent of renal involvement
Phenotypic features of IL-17+T-cells in patients with SLE
Expression of costimulatory markers CD134 and CD80 on IL17-producing T-cells in active and inactive patients and patients with and without lupus nephritis
Patients with and without active disease were analysed for CD80 expression on IL-17 producing T-cells. The percentages of CD80 expressing IL-17 producing T cells showed no differences between active and inactive patients (25.02 ± 16.01% vs. 25.97 ± 14.46%, P = 0.87). There was a significant difference between inactive SLE patients and healthy controls (25.97 ± 14.46% vs. 14.99 ± 5.74%, P = 0.02). Expression of CD80 on IL-17 producing T cells in active patients tended to be increased as compared to healthy controls (25.02 ± 16.01% vs. 14.99 ± 5.74%, P = 0.07). Patients were further analysed based on the presence of lupus nephritis. Patients with and without lupus nephritis showed significantly higher levels of CD80 expression on IL17+ cells as compared to healthy controls (26.71 ± 15.85% and 26.90 ± 15.06% vs. 14.99 ± 5.74%, P = 0.04 and P = 0.02, respectively).There was no difference in the expression of CD80 on IL17+ cells between patients with and without lupus nephritis (26.71 ± 15.85% vs. 26.90 ± 15.06%, P = 0.85) (Figure 3c and 3d). No significant difference could be observed comparing the expression of CD80 on IL-17 producing T-cells in patients with class IV and V lupus nephritis (36.25 ± 18.66% vs. 21.93 ± 9.18%, P = 0.63). Interestingly, there was a correlation between CD80 expression on IL-17 producing T-cells and anti-dsDNA titres and decreased C3 levels, respectively (r = 0.6, P = 0.0003 and r = -0.5, P = 0.01).
Expression of CD134 on IL-17 producing T cells was significantly higher in patients with active disease as compared to healthy controls (74.87 ± 10.64% vs. 51.54 ± 16.58%, P = 0.0009). Also in patients with inactive disease expression of CD134 on IL-17 producing T-cells was higher as compared to healthy controls (68.69 ± 17.39% vs. 51.45 ± 16.58%, P = 0.0382), but it did not differ from active patients (68.69 ± 17.39% vs. 74.87 ± 10.64%, P = 0.34). Patients with lupus nephritis expressed higher levels of CD134 on peripheral T cells as compared to healthy controls (72.69 ± 11.54% vs. 51.45 ± 16.58%, P = 0.0056). Patients without lupus nephritis also showed higher levels of CD134 on IL-17 producing T cells in comparison to healthy individuals (70.27 ± 17.18% vs. 51.45 ± 16.58%, P = 0.01). No difference could be observed between patients with and without lupus nephritis (72.69 ± 11.54% vs.70.27 ± 17.18%, P = 0.91) (Figure 3d). Further, expression of CD134 on IL-17 producing T-cells showed no significant differences between class IV and V lupus nephritis (69.05 ± 10.97% vs. 78.27 ± 6.51%, P = 0.23).
Immunohistochemistry (IHC) staining for CD134 in inflamed tissue
The results of this study suggest that IL-17 producing cells play a pivotal role in the pathogenesis of systemic lupus erythematosus. In vitro stimulated CD3+ cells from active SLE patients produced significantly higher levels of IL-17 as compared to healthy controls. Remarkably, only T cells isolated from active patients produced higher levels of IL-17 than controls. The association between IL-17 production and disease activity was further supported by a significant correlation of IL-17 expression and disease activity as assessed by SLEDAI. These findings are in accordance with a large previous study by Yang et al. in which 50 patients were enrolled . In addition, Wong et al. demonstrated increased circulating plasma concentrations of IL-17 in SLE patients as compared to healthy controls. In contrast to our study a correlation of plasma levels of IL-17 and disease activity could only be found in patients without renal disease . Both studies lack a detailed subanalysis of patients with and without lupus nephritis. Therefore, a subanalysis was performed on the presence of lupus nephritis in this study. Patients with biopsy proven lupus nephritis were compared to patients without renal involvement. However, a significant difference in the amount of IL17-producing peripheral CD3+ cells could not be found between these groups which could be related to the rather small size and heterogeneous composition of this group of biopsy proven lupus nephritis patients. Moreover, the impact of immunosuppressive drugs remains uncertain although we found no difference in patients on prednisone versus patients with a combination of immunosuppressive drugs regarding either IL-17 expression or expression of costimulatory molecules (data not shown). There is growing evidence in murine models that IL-17 plays a crucial role in the pathogenesis of renal diseases such as lupus nephritis [16, 17]. These results can be explained by the hypothetical migration of IL-17 cells into inflamed kidneys.
The present study reveals that IL-17 cells express significantly higher amounts of the costimulatory markers CD80 and CD134. Ex vivo stimulation has been shown to upregulate the expression of CD134 over time but the significant difference between active patients and controls seem to be associated with disease activity according to our findings . In addition, we detected CD134+ T-cells in lupus nephritis biopsies. These findings have been confirmed by Zhou et al. in a larger analysis 40 kidney biopsies . Possibly, in humans these CD134+ T-cells infiltrate the kidney after ligation with CD134L expressed by endothelial cells which could subsequently lead to IL-17 mediated renal injury. Blocking CD134/CD134Ligand interaction as a therapeutic intervention has been successfully used in lupus mice . However, the role of IL-17 has not been investigated in that study. Interestingly, a recent report investigating the influence of CD134/CD134Ligand interaction on IL-17 cytokine production suggests that IL-17 production is downregulated after ligation of CD134 . This could be interpreted as a negative feedback loop for the effector function of CD134+ cells but the detailed mechanisms remain unclear. An important regulatory role of Th17 cells through the CD28/CD80 pathway was also discussed in a murine model .
Taken together we demonstrated that IL-17 producing cells are closely linked to disease activity in SLE patients and express high levels of the costimulatory markers CD80 and CD134. These new subsets of IL-17 cells might be important in human lupus nephritis.
The presence of CD134+ T-cells in renal biopsies of lupus nephritis patients suggest that these cells migrate to the kidney and might contribute to inflammatory processes through IL-17 secretion. Further studies are necessary to dissect pathogenic role of IL-17 in lupus in order to establish IL-17 as a therapeutic target in SLE.
American College of Rheumatology
fluorescence activated cell sorting
phosphate buffered saline
peridin chlorophyll protein
peripheral blood mononuclear cell
systemic lupus erythematosus
systemic lupus erythematosus disease activity index.
This study was supported by a grant from the Deutsche Forschungsgemeinschaft (DFG), DO 1419/1-1 (S.D.) and by an IFORES grant of the Medical Faculty of the University Duisburg-Essen.
- Abbas AK, Murphy KM, Sher A: Functional diversity of helper T lymphocytes. Nature. 1996, 383: 787-793. 10.1038/383787a0.View ArticlePubMedGoogle Scholar
- Viallard JF, Pellegrin JL, Ranchin V, Schaeverbeke T, Dehais J, Longy-Boursier M, Ragnaud JM, Leng B, Moreau JF: Th1 (IL-2, interferon-gamma (IFN-gamma)) and Th2 (IL-10, IL-4) cytokine production by peripheral blood mononuclear cells (PBMC) from patients with systemic lupus erythematosus (SLE). Clin Exp Immunol. 1999, 115: 189-195. 10.1046/j.1365-2249.1999.00766.x.PubMed CentralView ArticlePubMedGoogle Scholar
- Annunziato F, Cosmi L, Santarlasci V, Maggi L, Liotta F, Mazzinghi B, Parente E, Fili L, Ferri S, Frosali F, Giudici F, Romagnani P, Parronchi P, Tonelli F, Maggi E, Romagnani S: Phenotypic and functional features of human Th17 cells. J Exp Med. 2007, 204: 1849-1861. 10.1084/jem.20070663.PubMed CentralView ArticlePubMedGoogle Scholar
- Laan M, Cui ZH, Hoshino H, Lotvall J, Sjostrand M, Gruenert DC, Skoogh BE, Linden A: Neutrophil recruitment by human IL-17 via C-X-C chemokine release in the airways. J Immunol. 1999, 162: 2347-2352.PubMedGoogle Scholar
- Witowski J, Pawlaczyk K, Breborowicz A, Scheuren A, Kuzlan-Pawlaczyk M, Wisniewska J, Polubinska A, Friess H, Gahl GM, Frei U, Jörres A: IL-17 stimulates intraperitoneal neutrophil infiltration through the release of GRO alpha chemokine from mesothelial cells. J Immunol. 2000, 165: 5814-5821.View ArticlePubMedGoogle Scholar
- Woltman AM, de Haij S, Boonstra JG, Gobin SJ, Daha MR, van Kooten C: Interleukin-17 and CD40-ligand synergistically enhance cytokine and chemokine production by renal epithelial cells. J Am Soc Nephrol. 2000, 11: 2044-2055.PubMedGoogle Scholar
- Abdulahad WH, Stegeman CA, Limburg PC, Kallenberg CG: Skewed distribution of Th17 lymphocytes in patients with Wegener's granulomatosis in remission. Arthritis Rheum. 2008, 58: 2196-2205. 10.1002/art.23557.View ArticlePubMedGoogle Scholar
- Fitch E, Harper E, Skorcheva I, Kurtz SE, Blauvelt A: Pathophysiology of psoriasis: recent advances on IL-23 and Th17 cytokines. Curr Rheumatol Rep. 2007, 9: 461-467. 10.1007/s11926-007-0075-1.PubMed CentralView ArticlePubMedGoogle Scholar
- Kebir H, Kreymborg K, Ifergan I, Dodelet-Devillers A, Cayrol R, Bernard M, Giuliani F, Arbour N, Becher B, Prat A: Human TH17 lymphocytes promote blood-brain barrier disruption and central nervous system inflammation. Nat Med. 2007, 13: 1173-1175. 10.1038/nm1651.View ArticlePubMedGoogle Scholar
- Schmechel S, Konrad A, Diegelmann J, Glas J, Wetzke M, Paschos E, Lohse P, Goke B, Brand S: Linking genetic susceptibility to Crohn's disease with Th17 cell function: IL-22 serum levels are increased in Crohn's disease and correlate with disease activity and IL23R genotype status. Inflamm Bowel Dis. 2008, 14: 204-212. 10.1002/ibd.20315.View ArticlePubMedGoogle Scholar
- Shen H, Goodall JC, Hill Gaston JS: Frequency and phenotype of peripheral blood Th17 cells in ankylosing spondylitis and rheumatoid arthritis. Arthritis Rheum. 2009, 60: 1647-1656. 10.1002/art.24568.View ArticlePubMedGoogle Scholar
- Crispin JC, Oukka M, Bayliss G, Cohen RA, Van Beek CA, Stillman IE, Kyttaris VC, Juang YT, Tsokos GC: Expanded double negative T cells in patients with systemic lupus erythematosus produce IL-17 and infiltrate the kidneys. J Immunol. 2008, 181: 8761-8766.PubMed CentralView ArticlePubMedGoogle Scholar
- Crispin JC, Tsokos GC: Human TCR-alpha beta+ CD4- CD8- T cells can derive from CD8+ T cells and display an inflammatory effector phenotype. J Immunol. 2009, 183: 4675-4681. 10.4049/jimmunol.0901533.PubMed CentralView ArticlePubMedGoogle Scholar
- Yang J, Chu Y, Yang X, Gao D, Zhu L, Yang X, Wan L, Li M: Th17 and natural Treg cell population dynamics in systemic lupus erythematosus. Arthritis Rheum. 2009, 60: 1472-1483. 10.1002/art.24499.View ArticlePubMedGoogle Scholar
- Aten J, Roos A, Claessen N, Schilder-Tol EJ, Ten Berge IJ, Weening JJ: Strong and selective glomerular localization of CD134 ligand and TNF receptor-1 in proliferative lupus nephritis. J Am Soc Nephrol. 2000, 11: 1426-1438.PubMedGoogle Scholar
- Paust HJ, Turner JE, Steinmetz OM, Peters A, Heymann F, Holscher C, Wolf G, Kurts C, Mittrucker HW, Stahl RA, Panzer U: The IL-23/Th17 axis contributes to renal injury in experimental glomerulonephritis. J Am Soc Nephrol. 2009, 20: 969-979. 10.1681/ASN.2008050556.PubMed CentralView ArticlePubMedGoogle Scholar
- Zhang Z, Kyttaris VC, Tsokos GC: The role of IL-23/IL-17 axis in lupus nephritis. J Immunol. 2009, 183: 3160-3169. 10.4049/jimmunol.0900385.PubMed CentralView ArticlePubMedGoogle Scholar
- Wang Y, Ito S, Chino Y, Goto D, Matsumoto I, Murata H, Tsutsumi A, Hayashi T, Uchida K, Usui J, Yamagata K, Sumida T: Laser microdissection-based analysis of cytokine balance in the kidneys of patients with lupus nephritis. Clin Exp Immunol. 2010, 159: 1-10. 10.1111/j.1365-2249.2009.04031.x.PubMed CentralView ArticlePubMedGoogle Scholar
- Kwan BC, Tam LS, Lai KB, Lai FM, Li EK, Wang G, Chow KM, Li PK, Szeto CC: The gene expression of type 17 T-helper cell-related cytokines in the urinary sediment of patients with systemic lupus erythematosus. Rheumatology (Oxford). 2009, 48: 1491-1497. 10.1093/rheumatology/kep255.View ArticleGoogle Scholar
- Singh SP, Zhang HH, Foley JF, Hedrick MN, Farber JM: Human T cells that are able to produce IL-17 express the chemokine receptor CCR6. J Immunol. 2008, 180: 214-221.View ArticlePubMedGoogle Scholar
- Patschan S, Dolff S, Kribben A, Durig J, Patschan D, Wilde B, Specker C, Philipp T, Witzke O: CD134 expression on CD4+ T cells is associated with nephritis and disease activity in patients with systemic lupus erythematosus. Clin Exp Immunol. 2006, 145: 235-242. 10.1111/j.1365-2249.2006.03141.x.PubMed CentralView ArticlePubMedGoogle Scholar
- Lathrop SK, Huddleston CA, Dullforce PA, Montfort MJ, Weinberg AD, Parker DC: A signal through OX40 (CD134) allows anergic, autoreactive T cells to acquire effector cell functions. J Immunol. 2004, 172: 6735-6743.View ArticlePubMedGoogle Scholar
- Huddleston CA, Weinberg AD, Parker DC: OX40 (CD134) engagement drives differentiation of CD4+ T cells to effector cells. Eur J Immunol. 2006, 36: 1093-1103. 10.1002/eji.200535637.View ArticlePubMedGoogle Scholar
- Williams CA, Murray SE, Weinberg AD, Parker DC: OX40-mediated differentiation to effector function requires IL-2 receptor signaling but not CD28, CD40, IL-12Rbeta2, or T-bet. J Immunol. 2007, 178: 7694-7702.View ArticlePubMedGoogle Scholar
- Wilde B, Dolff S, Cai X, Specker C, Becker J, Totsch M, Costabel U, Durig J, Kribben A, Tervaert JW, Schmid KW, Witzke O: CD4+CD25+ T-cell populations expressing CD134 and GITR are associated with disease activity in patients with Wegener's granulomatosis. Nephrol Dial Transplant. 2009, 24: 161-171. 10.1093/ndt/gfn461.View ArticlePubMedGoogle Scholar
- Xiaoyan Z, Pirskanen R, Malmstrom V, Lefvert AK: Expression of OX40 (CD134) on CD4+ T-cells from patients with myasthenia gravis. Clin Exp Immunol. 2006, 143: 110-116. 10.1111/j.1365-2249.2005.02955.x.PubMed CentralView ArticlePubMedGoogle Scholar
- Giacomelli R, Passacantando A, Perricone R, Parzanese I, Rascente M, Minisola G, Tonietti G: T lymphocytes in the synovial fluid of patients with active rheumatoid arthritis display CD134-OX40 surface antigen. Clin Exp Rheumatol. 2001, 19: 317-320.PubMedGoogle Scholar
- Chabaud M, Durand JM, Buchs N, Fossiez F, Page G, Frappart L, Miossec P: Human interleukin-17: A T cell-derived proinflammatory cytokine produced by the rheumatoid synovium. Arthritis Rheum. 1999, 42: 963-970. 10.1002/1529-0131(199905)42:5<963::AID-ANR15>3.0.CO;2-E.View ArticlePubMedGoogle Scholar
- Wong CK, Lit LC, Tam LS, Li EK, Wong PT, Lam CW: Hyperproduction of IL-23 and IL-17 in patients with systemic lupus erythematosus: implications for Th17-mediated inflammation in auto-immunity. Clin Immunol. 2008, 127: 385-393. 10.1016/j.clim.2008.01.019.View ArticlePubMedGoogle Scholar
- Zhou YB, Ye RG, Li YJ, Xie CM: Targeting the CD134-CD134L interaction using anti-CD134 and/or rhCD134 fusion protein as a possible strategy to prevent lupus nephritis. Rheumatol Int. 2009, 29: 417-425. 10.1007/s00296-008-0697-2.View ArticlePubMedGoogle Scholar
- Zhou Y, Wu Y, Ye R, Li Y, Xie C: Expression and role of CD134 and NF-KB in renal tissue of lupus nephritis. Ann Rheum Dis. 2007, 66 (Suppl II): 318-(abstract)Google Scholar
- Li J, Li L, Shang X, Benson J, Merle Elloso M, Schantz A, Bracht M, Orlovsky Y, Sweet R: Negative regulation of IL-17 production by OX40/OX40L interaction. Cell Immunol. 2008, 253: 31-37. 10.1016/j.cellimm.2008.04.010.View ArticlePubMedGoogle Scholar
- Bouguermouh S, Fortin G, Baba N, Rubio M, Sarfati M: CD28 co-stimulation down regulates Th17 development. PLoS One. 2009, 4: e5087-10.1371/journal.pone.0005087.PubMed CentralView ArticlePubMedGoogle Scholar
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