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Updated: May 26, 2026

Adoptive Immunotherapy of iNKT Cells in Glucose-6-Phosphate Isomerase (G6PI)-Induced RA Mice
Published on: January 31, 2020
[Autoimmunity to glycolytic enzyme in rheumatoid arthritis]
Isao Matsumoto1, Keiichi Iwanami, Yoko Tanaka
1Division of Clinical Immunology, Graduate School of Comprehensive Human Science, University of Tsukuba, Japan.
Abstract:
Prognosis of rheumatoid arthritis (RA) patients has significantly improved with the recent use of biologics targeting TNFα, IL-6, and co-stimulatory molecule. In US and Europe, clear therapeutic benefit of anti-CD20 antibodies is also confirmed. As a disease specific marker, rheumatoid factor and anti-citrullinated protein antibody are crucial in RA, although the pathology of them is not defined. Here we focus on glycolytic enzyme such as glucose-6-phospate isomerase, that is confirmed as arthritogenic in two different mouse models, and discuss about pathogenic relevance to RA.
Insights
Rheumatoid arthritis (RA) prognosis improves with biologics. Glucose-6-phosphate isomerase, a glycolytic enzyme, shows arthritogenic potential relevant to RA pathogenesis.
Area of Science:
- Immunology and Rheumatology
- Molecular Biology
- Biochemistry
Context:
- Rheumatoid arthritis (RA) patient outcomes have improved with targeted biologics (anti-TNFα, anti-IL-6, anti-co-stimulatory molecules).
- Anti-CD20 antibodies demonstrate clear therapeutic benefits in RA in US and European clinical practice.
- Rheumatoid factor and anti-citrullinated protein antibodies are key RA markers, but their pathological roles remain unclear.
Purpose:
- To explore the pathogenic relevance of the glycolytic enzyme glucose-6-phosphate isomerase (GPI) in rheumatoid arthritis.
- To investigate GPI's role as an arthritogenic factor, building on evidence from mouse models.
Summary:
- Biologics targeting TNFα, IL-6, and co-stimulatory molecules have improved RA prognosis.
- Glucose-6-phosphate isomerase (GPI), a glycolytic enzyme, has been confirmed as arthritogenic in murine models.
- This study discusses the pathogenic relevance of GPI in rheumatoid arthritis, complementing known disease markers.
Impact:
- Highlights a potential novel therapeutic target (GPI) for rheumatoid arthritis.
- Advances understanding of RA pathogenesis beyond established autoantibodies.
- Provides a molecular target for future RA drug development and research.
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