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JCI Insight. 2019 May 16;4(10). pii: 127745. doi: 10.1172/jci.insight.127745. eCollection 2019 May 16.

Polycomb repressive complex 2 is a critical mediator of allergic inflammation.

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The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.
Department of Medical Biology, The University of Melbourne, Parkville, Victoria, Australia.
Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and the University of Newcastle, Newcastle, Australia.
Centre for Inflammation, Centenary Institute and University of Technology Sydney, Sydney, Australia.


Strategies that intervene with the development of immune-mediated diseases are urgently needed, as current treatments mostly focus on alleviating symptoms rather than reversing the disease. Targeting enzymes involved in epigenetic modifications to chromatin represents an alternative strategy that has the potential to perturb the function of the lymphocytes that drive the immune response. Here, we report that 2 major epigenetic silencing pathways are increased after T cell activation. By specific inactivation of these molecules in the T cell compartment in vivo, we demonstrate that the polycomb repressive complex 2 (PRC2) is essential for the generation of allergic responses. Furthermore, we show that small-molecule inhibition of the PRC2 methyltransferase, enhancer of zeste homolog 2 (Ezh2), reduces allergic inflammation in mice. Therefore, by systematically surveying the pathways involved in epigenetic gene silencing we have identified Ezh2 as a target for the suppression of allergic disease.


Allergy; Epigenetics; Immunology; Inflammation; T cells

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