Related Experiment Video
Updated: Jul 13, 2026
07:37
An Adoptive Transfer Model of Rheumatoid Arthritis in Mice
Published on: June 6, 2025
Rheumatoid arthritis and interleukin-32
1Department of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
Cellular and Molecular Life Sciences : CMLS
|July 11, 2007
Summary
Interleukin-32 (IL-32) is a novel cytokine that promotes inflammation in rheumatoid arthritis. Elevated IL-32 levels in patients correlate with disease severity, highlighting its role in arthritis pathogenesis.
Area of Science:
- Immunology
- Rheumatology
- Cytokine Biology
Background:
- Rheumatoid arthritis (RA) pathogenesis involves a complex inflammatory cytokine cascade.
- Interleukin-32 (IL-32) is a recently identified human cytokine implicated in inflammatory processes.
- IL-32 expression is detected in lymphoid tissues, leukocytes, and stimulated cells relevant to joint inflammation.
Purpose of the Study:
- To investigate the role of Interleukin-32 (IL-32) in the pathogenesis of rheumatoid arthritis.
- To determine the correlation between IL-32 expression and disease severity in RA patients.
- To evaluate the effects of IL-32 in experimental arthritis models.
Main Methods:
- Analysis of IL-32 expression in synovial tissues from rheumatoid arthritis patients.
- In vitro and in vivo studies on IL-32's ability to induce inflammatory cytokines (TNF-alpha, IL-1beta, IL-6).
- Assessment of IL-32's impact in experimental mouse models of arthritis, including joint injection and gene overexpression.
Main Results:
- Interleukin-32 (IL-32) is prominently expressed in inflamed synovial tissues of RA patients.
- IL-32 expression levels correlate positively with arthritis severity and the presence of other pro-inflammatory cytokines like TNF-alpha and IL-1.
- Experimental administration of IL-32 induced joint inflammation in mice, and IL-32beta overexpression exacerbated collagen-induced arthritis.
Conclusions:
- Interleukin-32 (IL-32) plays a significant role in the inflammatory mechanisms underlying rheumatoid arthritis.
- IL-32 contributes to RA pathogenesis by inducing key inflammatory cytokines and exacerbating joint inflammation.
- Targeting IL-32 may represent a potential therapeutic strategy for rheumatoid arthritis.
Related Concept Videos
01:24T Cell Types and Functions
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
01:20The JAK-STAT Signaling Pathway
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
01:25Inflammatory Bowel Disease III: Crohn's Disease
Crohn’s disease is a chronic, relapsing form of inflammatory bowel disease characterized by segmental, transmural inflammation that can affect any part of the gastrointestinal tract. Its pathogenesis arises from a combination of genetic susceptibility, environmental exposures, epithelial barrier dysfunction, and immune dysregulation. Together, these factors lead to an exaggerated immune response against components of the gut microbiome.Genetic and Environmental InfluencesMultiple genetic...
01:20Inflammatory Bowel Disease II: Ulcerative Colitis
Ulcerative colitis is a chronic inflammatory disorder of the colon characterized by continuous mucosal inflammation that typically begins in the rectum and extends proximally in a uniform pattern. Its pathogenesis involves a complex interplay of genetic predisposition, immune dysregulation, and environmental influences. These factors converge to impair the colon’s epithelial defenses and promote an exaggerated inflammatory response against luminal contents.Breakdown of the Mucosal BarrierA...
01:24Drugs for Treatment of Crohn's Disease in IBD Using Biologic Agents: Anti-TNF
Tumor Necrosis Factor (TNF), a proinflammatory cytokine, contributes significantly to the inflammation seen in Crohn's disease. It exists as soluble TNF and membrane-bound TNF, with actions mediated through TNF receptors (TNFR). TNFR activation leads to the release of proinflammatory cytokines, T-cell activation, collagen production, and leukocyte migration, all contributing to inflammation in Crohn's disease. Anti-TNF monoclonal antibodies, namely infliximab (Remicade), adalimumab (Humira),...
01:28Inflammatory Response
An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...