The kinase LRRK2 is a regulator of the transcription factor NFAT that modulates the severity of inflammatory bowel disease

  • Liu Z
  • Lee J
  • Krummey S
 et al. 
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Leucine-rich repeat kinase 2 (LRRK2) has been identified by genome-wide association studies as being encoded by a major susceptibility gene for Crohn's disease. Here we found that LRRK2 deficiency conferred enhanced susceptibility to experimental colitis in mice. Mechanistic studies showed that LRRK2 was a potent negative regulator of the transcription factor NFAT and was a component of a complex that included the large noncoding RNA NRON (an NFAT repressor). Furthermore, the risk-associated allele encoding LRRK2 Met2397 identified by a genome-wide association study for Crohn's disease resulted in less LRRK2 protein post-translationally. Severe colitis in LRRK2-deficient mice was associated with enhanced nuclear localization of NFAT1. Thus, our study defines a new step in the control of NFAT activation that involves an immunoregulatory function of LRRK2 and has important implications for inflammatory bowel disease.

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  • Zhihua Liu

  • Jinwoo Lee

  • Scott Krummey

  • Wei Lu

  • Huaibin Cai

  • Michael J. Lenardo

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