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The original was posted on /r/science by /u/CUAnschutzMed on 2025-07-02 17:53:05+00:00.

Original Title: A new study by scientists at the University of Colorado Anschutz Medical Campus reveals that joint tissue from patients with early-stage rheumatoid arthritis often have high levels of a protein called granzyme used by the immune system to attack pathogens.