Endophilin A2 deficiency protects rodents from autoimmune arthritis by modulating T cell activation

  • Ulrika Norin
  • , Carola Rintisch
  • , Liesu Meng
  • , Florian Forster
  • , Diana Ekman
  • , Jonatan Tuncel
  • , Katrin Klocke
  • , Johan Bäcklund
  • , Min Yang
  • , Michael Y. Bonner
  • , Gonzalo Fernandez Lahore
  • , Jaime James
  • , Klementy Shchetynsky
  • , Maria Bergquist
  • , Inger Gjertsson
  • , Norbert Hubner
  • , Liselotte Bäckdahl
  • , Rikard Holmdahl

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The introduction of the CTLA-4 recombinant fusion protein has demonstrated therapeutic effects by selectively modulating T-cell activation in rheumatoid arthritis. Here we show, using a forward genetic approach, that a mutation in the SH3gl1 gene encoding the endocytic protein Endophilin A2 is associated with the development of arthritis in rodents. Defective expression of SH3gl1 affects T cell effector functions and alters the activation threshold of autoreactive T cells, thereby leading to complete protection from chronic autoimmune inflammatory disease in both mice and rats. We further show that SH3GL1 regulates human T cell signaling and T cell receptor internalization, and its expression is upregulated in rheumatoid arthritis patients. Collectively our data identify SH3GL1 as a key regulator of T cell activation, and as a potential target for treatment of autoimmune diseases.

Original languageEnglish
Article number610
JournalNature Communications
Volume12
Issue number1
DOIs
StatePublished - 1 Dec 2021

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