Elevated levels of IL-33 induce the production of autoantibodies through an unknown mechanism. Here, the authors show that IL-33 disrupts splenic architecture and germinal center organization, causing an expansion of antibody-secreting plasmablasts and plasma cells. In multiple mouse models of inflammation, administration of IL-33 exacerbates the pathology, increasing the production of autoantibodies, whereas IL-33 blockade reverses autoantibody production in a model of lung inflammation.
- Eva Conde
- Seblewongel Asrat
- Jamie M. Orengo