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2014 ; 40
(4
): 477-89
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Small-molecule ROR?t antagonists inhibit T helper 17 cell transcriptional network
by divergent mechanisms
#MMPMID24745332
Xiao S
; Yosef N
; Yang J
; Wang Y
; Zhou L
; Zhu C
; Wu C
; Baloglu E
; Schmidt D
; Ramesh R
; Lobera M
; Sundrud MS
; Tsai PY
; Xiang Z
; Wang J
; Xu Y
; Lin X
; Kretschmer K
; Rahl PB
; Young RA
; Zhong Z
; Hafler DA
; Regev A
; Ghosh S
; Marson A
; Kuchroo VK
Immunity
2014[Apr]; 40
(4
): 477-89
PMID24745332
show ga
We identified three retinoid-related orphan receptor gamma t (ROR?t)-specific
inhibitors that suppress T helper 17 (Th17) cell responses, including
Th17-cell-mediated autoimmune disease. We systemically characterized ROR?t
binding in the presence and absence of drugs with corresponding whole-genome
transcriptome sequencing. ROR?t acts as a direct activator of Th17 cell signature
genes and a direct repressor of signature genes from other T cell lineages; its
strongest transcriptional effects are on cis-regulatory sites containing the ROR?
binding motif. ROR?t is central in a densely interconnected regulatory network
that shapes the balance of T cell differentiation. Here, the three inhibitors
modulated the ROR?t-dependent transcriptional network to varying extents and
through distinct mechanisms. Whereas one inhibitor displaced ROR?t from its
target loci, the other two inhibitors affected transcription predominantly
without removing DNA binding. Our work illustrates the power of a system-scale
analysis of transcriptional regulation to characterize potential therapeutic
compounds that inhibit pathogenic Th17 cells and suppress autoimmunity.