| First Author | Yang YJ | Year | 2009 |
| Journal | J Exp Med | Volume | 206 |
| Issue | 1 | Pages | 195-207 |
| PubMed ID | 19124655 | Mgi Jnum | J:144026 |
| Mgi Id | MGI:3829805 | Doi | 10.1084/jem.20081140 |
| Citation | Yang YJ, et al. (2009) Rcan1 negatively regulates Fc epsilonRI-mediated signaling and mast cell function. J Exp Med 206(1):195-207 |
| abstractText | Aggregation of the high affinity IgE receptor (Fc epsilonRI) activates a cascade of signaling events leading to mast cell activation. Subsequently, inhibitory signals are engaged for turning off activating signals. We identified that regulator of calcineurin (Rcan) 1 serves as a negative regulator for turning off Fc epsilonRI-mediated mast cell activation. Fc epsilonRI-induced Rcan1 expression was identified by suppression subtractive hybridization and verified by real-time quantitative polymerase chain reaction and Western blotting. Deficiency of Rcan1 led to increased calcineurin activity, increased nuclear factor of activated T cells and nuclear factor kappaB activation, increased cytokine production, and enhanced immunoglobulin E-mediated late-phase cutaneous reactions. Forced expression of Rcan1 in wild-type or Rcan1-deficient mast cells reduced Fc epsilonRI-mediated cytokine production. Rcan1 deficiency also led to increased Fc epsilonRI-mediated mast cell degranulation and enhanced passive cutaneous anaphylaxis. Analysis of the Rcan1 promoter identified a functional Egr1 binding site. Biochemical and genetic evidence suggested that Egr1 controls Rcan1 expression. Our results identified Rcan1 as a novel inhibitory signal in Fc epsilonRI-induced mast cell activation and established a new link of Egr1 and Rcan1 in Fc epsilonRI signaling. |
