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Critical proinflammatory role of thymic stromal lymphopoietin and its receptor in experimental autoimmune arthritis. 2011

S A Y Hartgring, and C R Willis, and C E Dean, and F Broere, and W van Eden, and J W J Bijlsma, and F P J G Lafeber, and J A G van Roon
University Medical Center Utrecht, Utrecht, The Netherlands.

OBJECTIVE The interleukin-7 (IL-7)-related cytokine thymic stromal lymphopoietin (TSLP) is a potent activator of myeloid dendritic cells, enhancing Th2-mediated hypersensitivity, and it has been implicated in the pathogenesis of atopic diseases. Although intraarticular concentrations of TSLP have been shown to be increased in patients with rheumatoid arthritis (RA), the functional capacities of TSLP in arthritis are poorly studied. The purpose of this study was to investigate the effects of TSLP administration and TSLP receptor deficiency on immune activation, arthritis severity, and tissue destruction in T cell-driven arthritis models of RA. METHODS Immunopathology was studied in arthritic mice that were given multiple injections of murine recombinant TSLP and in mice that were deficient in the TSLP receptor (TSLPR(-/-)). Arthritis severity and incidence were determined by visual examination of the paws. Joint destruction was determined by assessing radiographs and the immunohistochemistry of ankle joints. Total cellularity and numbers of T cell subsets were assessed. Proinflammatory mediators were measured by multianalyte profiling of serum or paw protein extracts. RESULTS Administration of TSLP significantly exacerbated the severity of collagen-induced arthritis and the joint damage that was associated with increased T cell activation. Furthermore, TSLPR(-/-) mice had less severe arthritis than did wild-type mice. TSLPR(-/-) mice had diminished concentrations of local proinflammatory and catabolic mediators, including IL-17, IL-1β, IL-6, basic fibroblast growth factor, and matrix metalloproteinase 9, while levels of the regulatory cytokines IL-10 and IL-13 were increased. CONCLUSIONS TSLP and its receptor enhance Th17-driven arthritis and tissue destruction in experimental arthritis. The increased expression of TSLP as well as the increased number of TSLPR-expressing cells in the joints of patients with RA suggest that TSLP and its receptor constitute novel therapeutic targets in RA.

UI MeSH Term Description Entries
D007136 Immunoglobulins Multi-subunit proteins which function in IMMUNITY. They are produced by B LYMPHOCYTES from the IMMUNOGLOBULIN GENES. They are comprised of two heavy (IMMUNOGLOBULIN HEAVY CHAINS) and two light chains (IMMUNOGLOBULIN LIGHT CHAINS) with additional ancillary polypeptide chains depending on their isoforms. The variety of isoforms include monomeric or polymeric forms, and transmembrane forms (B-CELL ANTIGEN RECEPTORS) or secreted forms (ANTIBODIES). They are divided by the amino acid sequence of their heavy chains into five classes (IMMUNOGLOBULIN A; IMMUNOGLOBULIN D; IMMUNOGLOBULIN E; IMMUNOGLOBULIN G; IMMUNOGLOBULIN M) and various subclasses. Globulins, Immune,Immune Globulin,Immune Globulins,Immunoglobulin,Globulin, Immune
D007249 Inflammation A pathological process characterized by injury or destruction of tissues caused by a variety of cytologic and chemical reactions. It is usually manifested by typical signs of pain, heat, redness, swelling, and loss of function. Innate Inflammatory Response,Inflammations,Inflammatory Response, Innate,Innate Inflammatory Responses
D011859 Radiography Examination of any part of the body for diagnostic purposes by means of X-RAYS or GAMMA RAYS, recording the image on a sensitized surface (such as photographic film). Radiology, Diagnostic X-Ray,Roentgenography,X-Ray, Diagnostic,Diagnostic X-Ray,Diagnostic X-Ray Radiology,X-Ray Radiology, Diagnostic,Diagnostic X Ray,Diagnostic X Ray Radiology,Diagnostic X-Rays,Radiology, Diagnostic X Ray,X Ray Radiology, Diagnostic,X Ray, Diagnostic,X-Rays, Diagnostic
D005434 Flow Cytometry Technique using an instrument system for making, processing, and displaying one or more measurements on individual cells obtained from a cell suspension. Cells are usually stained with one or more fluorescent dyes specific to cell components of interest, e.g., DNA, and fluorescence of each cell is measured as it rapidly transverses the excitation beam (laser or mercury arc lamp). Fluorescence provides a quantitative measure of various biochemical and biophysical properties of the cell, as well as a basis for cell sorting. Other measurable optical parameters include light absorption and light scattering, the latter being applicable to the measurement of cell size, shape, density, granularity, and stain uptake. Cytofluorometry, Flow,Cytometry, Flow,Flow Microfluorimetry,Fluorescence-Activated Cell Sorting,Microfluorometry, Flow,Cell Sorting, Fluorescence-Activated,Cell Sortings, Fluorescence-Activated,Cytofluorometries, Flow,Cytometries, Flow,Flow Cytofluorometries,Flow Cytofluorometry,Flow Cytometries,Flow Microfluorometries,Flow Microfluorometry,Fluorescence Activated Cell Sorting,Fluorescence-Activated Cell Sortings,Microfluorimetry, Flow,Microfluorometries, Flow,Sorting, Fluorescence-Activated Cell,Sortings, Fluorescence-Activated Cell
D000094632 Thymic Stromal Lymphopoietin A pleiotropic cytokine involved in INFLAMMATION and immunoregulation. Thymic stromal lymphopoietin can activate MAST CELLS; DENDRITIC CELLS; and T-LYMPHOCYTES, and is produced by various cell types, including epithelial and dendritic cells.. TSLP Cytokine,Cytokine, TSLP,Lymphopoietin, Thymic Stromal,Stromal Lymphopoietin, Thymic
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000843 Ankle Joint The joint that is formed by the inferior articular and malleolar articular surfaces of the TIBIA; the malleolar articular surface of the FIBULA; and the medial malleolar, lateral malleolar, and superior surfaces of the TALUS. Ankle Syndesmosis,Articulatio talocruralis,Distal Tibiofibular Joint,Inferior Tibiofibular Joint,Talocrural Joint,Tibiofibular Ankle Syndesmosis,Tibiofibular Syndesmosis,Ankle Joints,Ankle Syndesmoses,Ankle Syndesmosis, Tibiofibular,Distal Tibiofibular Joints,Inferior Tibiofibular Joints,Joint, Ankle,Joints, Ankle,Syndesmosis, Ankle,Talocrural Joints,Tibiofibular Ankle Syndesmoses,Tibiofibular Joint, Distal,Tibiofibular Syndesmoses
D001169 Arthritis, Experimental ARTHRITIS that is induced in experimental animals. Immunological methods and infectious agents can be used to develop experimental arthritis models. These methods include injections of stimulators of the immune response, such as an adjuvant (ADJUVANTS, IMMUNOLOGIC) or COLLAGEN. Adjuvant Arthritis,Arthritis, Adjuvant-Induced,Arthritis, Collagen-Induced,Arthritis, Adjuvant,Collagen Arthritis,Arthritides, Collagen,Arthritis, Collagen,Collagen Arthritides,Collagen-Induced Arthritides,Collagen-Induced Arthritis
D015851 Interleukin-7 A cytokine produced by bone marrow stromal cells that promotes the growth of B-LYMPHOCYTE precursors and is co-mitogenic with INTERLEUKIN-2 for mature T-LYMPHOCYTE activation. IL-7,IL7,Lymphopoietin-1,Interleukin 7,Lymphopoietin 1
D016207 Cytokines Non-antibody proteins secreted by inflammatory leukocytes and some non-leukocytic cells, that act as intercellular mediators. They differ from classical hormones in that they are produced by a number of tissue or cell types rather than by specialized glands. They generally act locally in a paracrine or autocrine rather than endocrine manner. Cytokine

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