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Updated: Jul 7, 2025

An Adoptive Transfer Model of Rheumatoid Arthritis in Mice
Published on: June 6, 2025
B7-H3 promotes angiogenesis in rheumatoid arthritis
Jie Yang1, Jian Xiong1, Yuling Sun1
1Institute of Medical Biotechnology Suzhou Vocational Health College, Suzhou 215009, China.
Objective:
The primary pathological changes of rheumatoid arthritis (RA) include chronic synovial inflammation, bone destruction, and aggressive pannus formation on cartilage, in which angiogenesis plays a critical role. B7-H3, an important immune checkpoint molecule, represents a novel target in tumor therapy and plays a significant role in the pathogenesis of autoimmune diseases. However, its biological mechanism in RA remains unclear.
Methods:
Hematoxylin-eosin (HE) staining and immunohistochemistry were used to explore the histological characteristics and expression of B7-H3, CD34, and vascular endothelial growth factor (VEGF) in patients with RA and collagen-induced arthritis (CIA) mice. ELISA was used to detect VEGF, soluble B7-H3, and disease markers in the peripheral blood of patients. A monoclonal anti-B7-H3 antibody was used to treat CIA mice by blocking B7-H3-mediated signaling.
Results:
The ELISA and HE staining results showed a positive correlation between the expression of B7-H3 and the degree of joint cavity destruction and pannus formation. B7-H3 expression also correlated with increased expression of the vessel biomarkers CD34 and VEGF. Anti-B7-H3 effectively reduced pannus formation in CIA mice.
Conclusion:
B7-H3 modulates angiogenic activity in the joint synovium, demonstrating its therapeutic value in the context of RA.
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