Abstracts tagged "T cells"

Abstract Number: 2724 • 2013 ACR/ARHP Annual Meeting
cAMP Responsive Element Modulator (CREM)α Governs CD8 Expression and Contributes to the Generation of CD3⁺CD4^–CD8^– T Cells in Lupus
Christian M. Hedrich¹, José C. Crispín¹, Thomas Rauen¹, Christina Ioannidis¹, Tomohiro Koga², Noe Rodriguez Rodriguez², Sokratis A. Apostolidis³, Vasileios C. Kyttaris² and George C. Tsokos¹, ¹Medicine/Rheumatology, BIDMC, Harvard Medical School, Boston, MA, ²Medicine/Rheumatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, ³Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
Background/Purpose: CD3+CD4-CD8- "double negative" T cells are expanded in the peripheral blood of patients with systemic lupus erythematosus (SLE) and lupus-prone mice. Double negative T…
Abstract Number: 1643 • 2013 ACR/ARHP Annual Meeting
Ex Vivo Suppression Of RA Effector T Cells (Teff) By Mapc Media Is Synergistic With Treg
Gali Malul¹, David Soler², Donald D. Anthony³, Hillard M. Lazarus⁴, Nicholas Lehman⁵, Thomas McCormick², Julia M. Sugalski⁶, Anthony E. Ting⁵ and Nora G. Singer⁷, ¹Rheumatology, MetroHealth Medical Center, Cleveland, OH, ²Dermatology, Case Medical Center, Cleveland, OH, ³Medicine, Case Western Reserve University, Cleveland, OH, ⁴Comprehensive Cancer Center, Case Medical Center, Cleveland, OH, ⁵Athersys, Inc., Cleveland, OH, ⁶Medicine/infectious disease, Case Western Reserve University, Cleveland, OH, ⁷Medicine, Division of Rheumatology, MetroHealth Medical Center, Cleveland, OH
Background/Purpose: Use of mesenchymal/multipotent stem cells (MSCs/MAPCs) is an emerging immune modulatory therapeutic strategy promising for a number of human diseases. Multipotent adult progenitor cells…
Abstract Number: 728 • 2013 ACR/ARHP Annual Meeting
Unraveling The Identity Of FoxP3⁺ Regulatory T-Cells In Gpa-Patients
WH Abdulahad¹, Coen A. Stegeman², MG Huitema¹, Pieter C. Limburg³, Abraham Rutgers¹, Peter Heeringa⁴ and Cees G.M. Kallenberg¹, ¹Rheumatology and Clinical Immunology, University Medical Center Groningen, Groningen, Netherlands, ²Nephrology, University Medical Center Groningen, Groningen, Netherlands, ³Department of Laboratory Medicine, University Medical Center Groningen, Groningen, Netherlands, ⁴Pathology and Medical Biology, University Medical Center Groningen, Groningen, Netherlands
Background/Purpose: Human FoxP3+ Th-cells are heterogeneous in function and include not only suppressive cells (TRegs) but also non-suppressive cells that abundantly secrete proinflammatory cytokines. We…
Abstract Number: 531 • 2013 ACR/ARHP Annual Meeting
Influenza Infection Of MHC-I Transgenic Mice Reveals That Erap Is Necessary and Sufficient For Generation Of The B27-Specific Immunodominant Epitope
Ali Akram¹ and Robert Inman², ¹Institute of Medical Science and Department of Immunology, University of Toronto and University Health Network (UHN), Toronto, ON, Canada, ²Immunlogy and Institute of Medical Science, University of Toronto and Toronto Western Hospital, Toronto, ON, Canada
Background/Purpose: Although HLA-B27 and ERAP are known to confer susceptibility to spondyloarthritis (SpA), the role of these elements in modulating host response to infection is…
Abstract Number: 2725 • 2013 ACR/ARHP Annual Meeting
Regulation Of Aberrant CD4 T Cell Activation By Suppressor Of Cytokine Signaling-1 (SOCS1) Mimetic Peptide, Has Relevance To Human Systemic Lupus Erythematosus
Tenisha Wilson¹, Cristina Armbruster², Simone Bedoya², Howard M. Johnson², Westley H. Reeves³, Yi Li⁴, Ying Yi Zheng⁵, Laurence Morel⁶ and Joseph Larkin III², ¹Division of Rheumatology & Clinical Immunology, University of Florida, Gainesville, FL, ²Microbiology and Cell Science, University of Florida, Gainesville, FL, ³Rheumatology & Clinical Imm, University of Florida, Gainesville, FL, ⁴Medicine, University of Florida, Gainesville, FL, ⁵Pathology, University of Florida, Gainesville, FL, ⁶Pathology/Immunology/Lab Medical, University of Florida, Gainesville, FL
Background/Purpose: Systemic lupus erythematosus (SLE) is an autoimmune disease, mediated by aberrantly activated CD4 T cells. Notably, suppressor of cytokine signaling-1 (SOCS1) regulates CD4 T…
Abstract Number: 1645 • 2013 ACR/ARHP Annual Meeting
Circulating CD4+CD161+ T Lymphocytes Are Increased In Seropositive Arthralgia Patients But Decreased In Patients With Newly Diagnosed Rheumatoid Arthritis
Paulina Chalan¹, Bart-Jan Kroesen², Kornelis S.M. van der Geest¹, Minke G. Huitema¹, Wayel H. Abdulahad³, Elisabeth Brouwer¹ and Annemieke M.H. Boots⁴, ¹Dept. of Rheumatology and Clinical Immunology, University Medical Center Groningen, Groningen, Netherlands, ²Dept. of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, Netherlands, ³Rheumatology and Clinical Immunology, University Medical Center Groningen, Groningen, Netherlands, ⁴Dept. of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
Background/Purpose: Improved understanding of the immune events discriminating between seropositive arthralgia and clinical synovitis is of key importance in rheumatology research. Ample evidence suggests a…
Abstract Number: 711 • 2013 ACR/ARHP Annual Meeting
1,25(OH)₂D₃ Inhibits Th17 Cytokine Production and RORγt Expression Through GATA3/IL4-Dependent and -Independent Mechanisms
Wendy Dankers¹, Jan Piet van Hamburg^2,3, Anne-Marie Mus¹, Patrick S. Asmawidjaja¹, Johannes van Leeuwen⁴, Rudi W. Hendriks⁵, Louis Boon⁶, Edgar Colin⁷ and Erik Lubberts^1,8, ¹Rheumatology, Erasmus MC, University Medical Center, Rotterdam, Netherlands, ²Rheumatology, Erasmus MC, Rotterdam, Netherlands, ³Immunology, Erasmus MC, University Medical Center, Rotterdam, Netherlands, ⁴Internal Medicine, Erasmus MC, University Medical Center, Rotterdam, Netherlands, ⁵Pulmonary Medicine, Erasmus MC, University Medical Center, Rotterdam, Netherlands, ⁶Bioceros, Utrecht, Netherlands, ⁷Department of Rheumatology, ZGT, Almelo, Netherlands, ⁸Erasmus Medical Center, Rheumatology, Rotterdam, Netherlands
Background/Purpose: Vitamin D has suppressive effects on autoimmune diseases, such as rheumatoid arthritis (RA). One important mechanism of disease suppression by vitamin D is inhibition…
Abstract Number: 540 • 2013 ACR/ARHP Annual Meeting
Exploration Of a Novel Therapeutic Target In a Murine Model Of Systemic Lupus Erythematosus: Targeting Sphingosine-1-Phosphate (S1P) Receptors
Christopher Tracy¹, Jess Edison², S. Frattalone² and C. Moratz³, ¹Internal Medicine-Rheumatology, Walter Reed National Military Medical Center, Bethesda, MD, ²Department of Rheumatology, Walter Reed National Military Medical Center, Bethesda, MD, ³Department of Medicine, Uniformed Services University of Health Sciences, Bethesda, MD
Background/Purpose: Systemic lupus erythematous (SLE) is an autoimmune disease characterized by symptomatic flares that often result in terminal organ failure. The pathogenesis is characterized by…
Abstract Number: 2504 • 2012 ACR/ARHP Annual Meeting
SOCS1 Is One of the Key Molecules to Prevent the Plasticity of Regulatory T Cells and the Development of Autoimmunity
Reiko Takahashi¹, Kenji Itoh¹, Fumihiko Kimura¹ and Akihiko Yoshimura², ¹Division of Rheumatology, Department of Internal Medicine, National Defense Medical College, Tokorozawa, Japan, ²Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo, Japan
Background/Purpose: Suppression of autoimmunity or inflamation by regulatory T cells (Tregs) is now well established, recently, natural Foxp3+T cells have been shown to be a…
Abstract Number: 2343 • 2012 ACR/ARHP Annual Meeting
The Therapeutic Antibody Tregalizumab (BT-061) Induces Activation of Regulatory T Cells by Engaging a Unique CD4 Mediated Signaling That Strongly Differs From Signaling Events Induced by Standard Anti-CD4 Antibodies
Bianca Helling¹, Benjamin Daelken¹, Holger Wallmeier², Silke Aigner¹, Chantal Zuber¹, Martin Koenig¹, Andre Engling¹, Frank Osterroth¹, Niklas Czeloth³ and Christoph Uherek¹, ¹Biotest AG, Dreieich, Germany, ²Condor Scientific Computing & Consulting, Sulzbach, Germany, ³Global Research Immunology, Biotest AG, Dreieich, Germany
Background/Purpose: The humanized CD4 specific monoclonal antibody (mAb) tregalizumab is currently being tested in phase II clinical trials in Rheumatoid Arthritis. In contrast to other…
Abstract Number: 1793 • 2012 ACR/ARHP Annual Meeting
The Cyclooxygenase/Prostaglandin-E₂ Pathway Is Critical for Autocrine IL-17A Production by Th17 Cells Upon Synovial Fibroblast Interaction
Sandra M.J. Paulissen¹, Jan Piet van Hamburg², Nadine Davelaar³, Patrick S. Asmawidjaja³, Johanna M.W. Hazes⁴ and Erik Lubberts³, ¹Immunology, Erasmus Medical Center, Immunology, Rotterdam, Netherlands, ²Rheumatology, Erasmus MC, Rotterdam, Netherlands, ³Rheumatology, Erasmus MC, University Medical Center, Rotterdam, Netherlands, ⁴Rheumatology, Erasmus University Medical Center, Rotterdam, Netherlands
Background/Purpose: Recently, we have shown that Th17, but not Th1 cells, from patients with early rheumatoid arthritis (RA) are potent activators of RA synovial fibroblasts…
Abstract Number: 857 • 2012 ACR/ARHP Annual Meeting
Impairment of the Inhibitory PD-1-PD-L1 Axis in Giant Cell Arteritis (GCA)
Mazen Nasrallah¹, Augusto Vaglio², Shalini Mohan¹, Bjorn Hartmann³, Joyce Liao⁴, Kenneth J. Warrington⁵, Jorg J. Goronzy³ and Cornelia M. Weyand⁶, ¹Medicine: Immunology and Rheumatology, Stanford University, Stanford, CA, ²Unit of Nephrology, University Hospital of Parma, Parma, Italy, ³Medicine: Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA, ⁴Byers Eye Institute at Stanford, Stanford University, Palo Alto, CA, ⁵Division of Rheumatology, Mayo Clinic, Rochester, MN, ⁶Medicine, Stanford University School of Medicine, Stanford, CA
Background/Purpose: Giant cell arteritis (GCA) is an autoimmune syndrome characterized by granuloma formation in the media of medium and large arteries. In a healthy immune…
Abstract Number: 2325 • 2012 ACR/ARHP Annual Meeting
PD-1 Signaling Promotes Suppressive Function of CD4⁺ Regulatory T Cells in (New Zealand Black x New Zealand White )F₁ Lupus-Prone Mice in a Dose-Dependent Manner
Maida Wong¹, Antonio La Cava² and Bevra H. Hahn³, ¹Internal Medicine/Rheumatology, University of California, Los Angeles, Los Angeles, CA, ²Internal Medicine/Rheumatology, UCLA David Geffen School of Medicine, Los Angeles, CA, ³Rheumatology, UCLA David Geffen School of Medicine, Los Angeles, CA
Background/Purpose: Programmed death-1 (PD-1) has been regarded as a negative regulatory signal in T cells. Our laboratory has shown that PD-1 is important in T…
Abstract Number: 2344 • 2012 ACR/ARHP Annual Meeting
Transcriptional Regulation of Garp Expression
Sonja Haupt¹, Qihui Zhou¹, Johannes Thomas Kreuzer¹, Simon Herrmann¹, Hendrik Schulze-Koops¹ and Alla Skapenko², ¹Division of Rheumatology and Clinical Immunology, Med.Klinik und Poliklinik IV, University of Munich, Munich, Germany, ²Division of Rheumatology and Clinical Immunology, University of Munich, Munich, Germany
Background/Purpose: Regulatory T cells (Tregs) contribute to immune tolerance and play a pivotal role in the prevention of autoimmune diseases such as rheumatoid arthritis (RA).…
Abstract Number: 1624 • 2012 ACR/ARHP Annual Meeting
Deletion of HLA-B27 T Cells Underlies the Immunodominant Response to Influenza Infection On Class I MHC Transgenic Mice
Ali Akram¹ and Robert D. Inman², ¹Institute of Medical Science and Department of Immunology, University of Toronto and University Health Network (UHN), Toronto, ON, Canada, ²Dept of Medicine/Rheumatology, Toronto Western Research Institute, University Health Network and University of Toronto, Toronto, ON, Canada
Background/Purpose: The role of HLA-B27 in modulating host response to infection is undefined, yet has important implications for the mechanism whereby B27 confers susceptibility to…

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