Abstracts tagged "T cells"

Abstract Number: 2330 • 2012 ACR/ARHP Annual Meeting
Mucosal-Associated Invariant T Cells Are Inactivated by IFNα and Reduced in Systemic Lupus Erythematosus
Asako Chiba¹, Naoto Tamura², Ran Matsudaira³, Takashi Yamamura¹, Yoshinari Takasaki² and Sachiko Miyake¹, ¹Department of Immunology, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan, ²Internal Medicine and Rheumatology, Juntendo University School of Medicine, Tokyo, Japan, ³Department of Internal Medicine and Rheumatology, Juntendo University School of Medicine, Tokyo, Japan
Background/Purpose: Mucosal-associated invariant T (MAIT) cells are a subset of innate-like lymphocytes which are restricted by the MHC-related molecule-1 (MR1) and express an invariant TCRα…
Abstract Number: 2317 • 2012 ACR/ARHP Annual Meeting
Protein Phosphatase 5 (PP5) Regulates Methylation Sensitive Gene Expression in CD4+ T Cells
Dipak R. Patel, Gabriela Gorelik and Bruce C. Richardson, Internal Medicine, University of Michigan, Ann Arbor, MI
Background/Purpose: CD4+CD28- T cells are enriched in chronic inflammatory diseases like rheumatoid arthritis (RA) and lupus. They are cytotoxic and resistant to apoptosis. Compared to…
Abstract Number: 1442 • 2012 ACR/ARHP Annual Meeting
IRF-1 Deficient Lupus-Prone MRL/Lpr Mice Show Reduced Glomerulonephritis but Develop Severe Interstitial Nephritis, Renal Vasculitis and Pulmonary Granulomas with Propensity for Th2 Polarity
Hidemaru Sekine¹, Takeshi Machida¹, Natsumi Sakamoto¹, Eiji Suzuki², Xian Zhang³, Christopher Reilly⁴ and Gary S. Gilkeson⁵, ¹Immunology, Fukushima Medical University School of Medicine, Fukushima, Japan, ²Medicine, Medical University of South Carolina, Charleston, SC, ³Medicine, Medical University of South Carolina and Ralph H. Johnson VA Medical Center, Charleston, SC, ⁴Virginia Tech, Blacksburg, VA, ⁵Department of Medicine, Division of Rheumatology, Medical University of South Carolina, Charleston, SC
Background/Purpose: The transcription factor interferon regulatory factor-4 (IRF-4) and -1 (IRF-1) are members of the IRF family of transcription regulators and involved in the development…
Abstract Number: 519 • 2012 ACR/ARHP Annual Meeting
Sex-Specific Regulatory T Cell Dysfunction in a Mouse Model of Sjögren Syndrome
Scott M. Lieberman¹, Portia A. Kreiger² and Gary A. Koretzky³, ¹Pediatrics, Div Rheumatology, The Children's Hospital of Philadelphia, Philadelphia, PA, ²Pathology, Nemours/A.I. DuPont Hospital for Children, Wilmington, DE, ³Medicine, University Pennsylvania, Philadelphia, PA
Background/Purpose: CD4+Foxp3+ regulatory T cells (Tregs) are a specialized population of lymphocytes which prevent autoimmunity in normal hosts. Treg dysfunction has been implicated in autoimmunity; however results…
Abstract Number: 2331 • 2012 ACR/ARHP Annual Meeting
The Effects of Anti–Tumor Necrosis Factor Agents On the Expansion of T Helper-Type 17 Cells Driven by Lipopolysaccharide-Stimulated Monocytes
Gianluca Fossati¹, Louise Healy¹ and Andrew Nesbitt², ¹UCB Pharma, Slough, United Kingdom, ²UCB Pharma, SLough, United Kingdom
Background/Purpose: T helper-type 17 (Th17) cells are proinflammatory CD4+ cells characterized by the production of Interleukin-17 (IL-17).There is evidence that IL-17 and other cytokines which…
Abstract Number: 2320 • 2012 ACR/ARHP Annual Meeting
Superantigen Induces IL-17 Production From Extremely Polarized Th1 Clones
Kentaro Yomogida¹, Yuan K. Chou¹ and Cong-Qiu Chu², ¹Division of Arthritis and Rheumatic Diseases, Oregon Health & Science University, Portland, OR, ²Rheumatology, Oregon Health & Science Univ and Portland VA Medical Center, Portland, OR
Background/Purpose: Differentiation of naïve CD4+ T cells is considered to be an irreversible event and, in particular, the plasticity is thought to be completely lost…
Abstract Number: 1447 • 2012 ACR/ARHP Annual Meeting
A Synthetic Triterpenoid CDDO-Me Prevents and Reverses Murine Lupus Nephritis
Tianfu Wu¹, Yujin Ye¹, Mei Yan¹, Xin J. Zhou², Michael Andreef³ and Chandra Mohan¹, ¹Division of Rheumatology/Internal Medicine, University of Texas, Southwestern Medical Center at Dallas, Dallas, TX, ²Internal Medicine - Rheumatic Diseases, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, ³Department of Stem Cell Transplantation and Cellular Therapy, The University of Texas M. D. Anderson Cancer Center, Houston, TX
Background/Purpose: Current treatment options for lupus are far from optimal. Previously, we have reported that PI3K/AKT/mTOR, MEK1/Erk1,2, p38, STAT3, STAT5, NF-κB, multiple Bcl-2 family members,…
Abstract Number: 521 • 2012 ACR/ARHP Annual Meeting
Differences in Genome-Wide DNA Methylation Profiles Across Multiple Cell and Tissue Types in Sjögren’s Syndrome (SS)
Lindsey A. Criswell¹, Diana Quach², Hong L. Quach², Emon Elboudwarej² and Lisa F. Barcellos², ¹Rosalind Russell Medical Research Center for Arthritis, Department of Medicine, Division of Rheumatology, University of California San Francisco, San Francisco, CA, ²Epidemiology, University of California, Berkeley, Berkeley, CA
Background/Purpose: Increasing evidence supports a role for epigenetic factors, including DNA methylation status, in autoimmune disease risk and severity. Our goal is to characterize DNA…
Abstract Number: 2332 • 2012 ACR/ARHP Annual Meeting
Suppression of PP2Ac Causes DNA Hypermethylation Through Enhanced Pmek/Perk Activity in T Cells
Katsue S. Watanabe¹, Kamalpreet Nagpal² and George C. Tsokos³, ¹Department of Medicine and Clinical Science, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan, ²Medicine/Rheumatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, ³Medicine/Rheumatology, BIDMC, Harvard Medical School, Boston, MA
Background/Purpose: Although many reports have focused on the impaired MEK-ERK signaling pathway in T cells from systemic lupus erythematosus (SLE) patients which results in suppression…
Abstract Number: 2322 • 2012 ACR/ARHP Annual Meeting
Dynamic Regulation of T Follicular Helper Cell Differentiation Through STAT Signaling
Shingo Nakayamada¹, Yuka Kanno², Golnaz Vahedi², John J. O'Shea² and Yoshiya Tanaka¹, ¹First Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan, ²National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH, Bethesda, MD
Background/Purpose: T follicular helper (Tfh) cells are a new subset of T cells that regulate B cell function and exert an important role in the…
Abstract Number: 1453 • 2012 ACR/ARHP Annual Meeting
Estrogen Receptor Alpha Impacts Th17 Expansion in Murine Lupus
Melissa A. Cunningham¹, Osama S. Naga², Jackie G. Eudaly³ and Gary S. Gilkeson⁴, ¹Med/Rheumatology, MUSC, Charleston, SC, ²Medicine/Rheumatology, Medical University of South Carolina, Charleston, SC, ³Med/Rheumatology, Medical University of SC, Charleston, SC, ⁴Department of Medicine, Division of Rheumatology, Medical University of South Carolina, Charleston, SC
Background/Purpose: Systemic lupus erythematosus is a disease that disproportionately affects females. The mechanisms underlying the female predominance in this disease are largely unknown. We previously…
Abstract Number: 509 • 2012 ACR/ARHP Annual Meeting
IL-7 and Toll-Like Receptor 7 Synergistically Increase Th1/Th17/Th22 Cytokine Secretion and Activity of B Cells
A. Bikker¹, A.a. Kruize¹, F. Redegeld², W. de Jager³, F.P.J.G. Lafeber⁴ and J.A.G. van Roon⁵, ¹Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht, Netherlands, ²Dept Pharmacology UU, Utrecht, Netherlands, ³Dept Immunology, UMC Utrecht, Utrecht, Netherlands, ⁴Rheumatology & Clinical Immunology, University Medical Center Utrecht, Utrecht, Netherlands, ⁵Rheumatology & Clinical Immunology/Lab Translational Immunology, University Medical Center Utrecht, Utrecht, Netherlands
Background/Purpose: IL-7 is a potent T cell activating cytokine that has been shown to cause proliferation, survival and differentiation of T cells as well as…
Abstract Number: 2333 • 2012 ACR/ARHP Annual Meeting
A Novel Subset of CD4 T Cells That Provides Help for Human Memory B Cell Responses
Sang T. Kim, Jin Young Choi, Begona Lainez and Joseph E. Craft, Internal Medicine, Section of Rheumatology, Yale University School of Medicine, New Haven, CT
Background/Purpose: Follicular helper T (Tfh) cells provide help to B cells in germinal centers (GCs) of secondary lymphoid organs (SLOs) following primary antigen (Ag) challenge,…
Abstract Number: 2323 • 2012 ACR/ARHP Annual Meeting
A Genetic Polymorphism on New Zealand Black Chromosome 1 Is Associated with Abnormal Dendritic Cell Function Leading to Expansion of T_H1, T_H17 and T Follicular Helper (T_FH) Cells
Nafiseh Talaei¹, Carolina Landolt-Marticorena², Babak Noamani¹, Evelyn Pau³, Nan-Hua Chang⁴ and Joan E. Wither⁵, ¹Genetics and developmental biology, Toronto Western Research Institute, University Health Network, Toronto, ON, Canada, ²Rheumatology, University Health Network, Toronto, ON, Canada, ³Toronto Western Research Institute, University Health Network, Toronto, ON, Canada, ⁴Genetics and Development, Toronto Western Research Institute, Toronto Western Hospital, Toronto, ON, Canada, ⁵1E420/Div of Rheumatology, Toronto Western Research Institute, Toronto Western Hospital, University of Toronto, Toronto, ON, Canada
Background/Purpose: We have previously shown that B6 mice with an introgressed homozygous New Zealand Black chromosome (c) 1 interval (70 to 100 cM) develop high titres…
Abstract Number: 1195 • 2012 ACR/ARHP Annual Meeting
Identification of Follicular Helper T Cells As a Novel Cell Population Potentially Involved in the Pathogenesis of Rheumatoid Arthritis
Sharon Ing¹, Anika Alarakhia¹, Elvira Lindwall¹, Austin Fraser¹, Jerald M. Zakem¹, William E. Davis¹, Tamika A. Webb-Detiege¹, Robert Quinet¹ and Xin Zhang², ¹Rheumatology, Ochsner Medical Center, New Orleans, LA, ²Institute of Translational Research, Ochsner Medical Center, New Orleans, LA
Background/Purpose: Rheumatoid Arthritis (RA) is an autoimmune disease characterized by chronic inflammation of the synovium, causing progressive joint destruction and reduction in quality of life…

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