Capicua deficiency induces autoimmunity and promotes follicular helper T cell differentiation via derepression of ETV5.
Sungjun ParkSeungwon LeeChoong-Gu LeeGuk Yeol ParkHyebeen HongJeon-Soo LeeYoung Min KimSung Bae LeeDaehee HwangYoun Soo ChoiJohn D FryerSin-Hyeog ImSeung-Woo LeeYoontae LeePublished in: Nature communications (2017)
High-affinity antibody production through the germinal centre (GC) response is a pivotal process in adaptive immunity. Abnormal development of follicular helper T (TFH) cells can induce the GC response to self-antigens, subsequently leading to autoimmunity. Here we show the transcriptional repressor Capicua/CIC maintains peripheral immune tolerance by suppressing aberrant activation of adaptive immunity. CIC deficiency induces excessive development of TFH cells and GC responses in a T-cell-intrinsic manner. ETV5 expression is derepressed in Cic null TFH cells and knockdown of Etv5 suppresses the enhanced TFH cell differentiation in Cic-deficient CD4+ T cells, suggesting that Etv5 is a critical CIC target gene in TFH cell differentiation. Furthermore, we identify Maf as a downstream target of the CIC-ETV5 axis in this process. These data demonstrate that CIC maintains T-cell homeostasis and negatively regulates TFH cell development and autoimmunity.
Keyphrases
- induced apoptosis
- acute lymphoblastic leukemia
- cell cycle arrest
- signaling pathway
- dendritic cells
- poor prognosis
- regulatory t cells
- cell death
- endoplasmic reticulum stress
- electronic health record
- gene expression
- transcription factor
- physical activity
- genome wide
- body mass index
- mass spectrometry
- dna methylation
- big data
- high resolution
- gas chromatography