Abstract
This study was aimed to determine the role and regulation of progranulin (PGRN) in the pathogenesis of inflammatory bowel diseases (IBD). Dextran sulfate sodium (DSS)-, picrylsulfonic acid (TNBS)-induced, bone marrow chimera and CD4+CD45Rb(hi) T cell transfer colitis model were established and analyzed in wild-type and several genetically-modified mice, including PGRN, IL-10 and TNFR2 deficient mice. Elevated levels of PGRN were found in colitis samples from human IBD patients and mouse colitis models in comparison to the corresponding controls. PGRN-deficient mice became highly susceptible to DSS- and TNBS-induced colitis, whereas recombinant PGRN ameliorated the pathology and reduced the histological score in both DSS and TNBS colitis models. In addition, hematopoietic-derived PGRN was critical for protection against DSS-induced colitis, and lack of PGRN signaling in CD4+ T cells also exacerbated experimental colitis. PGRN-mediated protective effect in colitis was compromised in the absence of IL-10 signaling. In addition, PGRN's effect was also largely lost in the TNFR2-deficient colitis model. Collectively, these findings not only provide the new insight into PGRN's anti-inflammatory action in vivo, but may also present PGRN and its derivatives as novel biological agent for treating IBD.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Anti-Inflammatory Agents, Non-Steroidal / metabolism
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Anti-Inflammatory Agents, Non-Steroidal / pharmacology*
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Bone Marrow / immunology
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Bone Marrow / pathology
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CD4-Positive T-Lymphocytes / immunology
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CD4-Positive T-Lymphocytes / metabolism
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CD4-Positive T-Lymphocytes / pathology
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Dextran Sulfate
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Disease Models, Animal
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Disease Progression
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Gene Expression Regulation
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Granulins
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Humans
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Inflammatory Bowel Diseases / chemically induced
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Inflammatory Bowel Diseases / drug therapy
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Inflammatory Bowel Diseases / genetics*
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Inflammatory Bowel Diseases / pathology
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Intercellular Signaling Peptides and Proteins / deficiency
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Intercellular Signaling Peptides and Proteins / genetics*
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Intercellular Signaling Peptides and Proteins / pharmacology
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Interleukin-10 / deficiency
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Interleukin-10 / genetics*
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Mice
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Mice, Knockout
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Progranulins
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Receptors, Tumor Necrosis Factor, Type II / deficiency
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Receptors, Tumor Necrosis Factor, Type II / genetics*
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Recombinant Proteins / genetics
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Recombinant Proteins / metabolism
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Recombinant Proteins / pharmacology
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Signal Transduction
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Transplantation Chimera
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Trinitrobenzenesulfonic Acid
Substances
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Anti-Inflammatory Agents, Non-Steroidal
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Granulins
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Grn protein, mouse
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IL10 protein, mouse
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Intercellular Signaling Peptides and Proteins
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Progranulins
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Receptors, Tumor Necrosis Factor, Type II
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Recombinant Proteins
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Interleukin-10
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Trinitrobenzenesulfonic Acid
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Dextran Sulfate