Researchers discover a major driver of inflammatory pathology in autoimmune and chronic inflammatory diseases

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EurekAlert! highlighted groundbreaking research findings from Foundation-funded investigators at Mass General who have discovered that a protein called granzyme K (GZMK) may be a key driver of inflammation and tissue damage in autoimmune diseases. This finding could pave the way for treatments that reduce harmful inflammation—without weakening the immune system’s ability to fight infections.

What This Means for Patients:

  • Potential for safer, more effective treatments
  • Therapies that target inflammation without increasing the risk of infection
  • A step toward better disease management and improved quality of life

This work was partly supported by the Rheumatology Research Foundation. Michael B. Brenner, MD, a 2023 Innovative Research Awardee (two-year award), led a project titled CD8 T Cell-Derived Granzyme K Activates Complement That Drives Synovial Fibroblast Inflammation. Anna Helena Jonsson, MD, PhD, a 2021 Investigator Awardee (three year project), led a project titled Roles of Granzyme K+ CD8 T cell Subsets Expanded in Rheumatoid Arthritis.

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