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2016 ; 5
(ä): ä Nephropedia Template TP
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Trisomy 21 consistently activates the interferon response
#MMPMID27472900
Sullivan KD
; Lewis HC
; Hill AA
; Pandey A
; Jackson LP
; Cabral JM
; Smith KP
; Liggett LA
; Gomez EB
; Galbraith MD
; DeGregori J
; Espinosa JM
Elife
2016[Jul]; 5
(ä): ä PMID27472900
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Although it is clear that trisomy 21 causes Down syndrome, the molecular events
acting downstream of the trisomy remain ill defined. Using complementary genomics
analyses, we identified the interferon pathway as the major signaling cascade
consistently activated by trisomy 21 in human cells. Transcriptome analysis
revealed that trisomy 21 activates the interferon transcriptional response in
fibroblast and lymphoblastoid cell lines, as well as circulating monocytes and T
cells. Trisomy 21 cells show increased induction of interferon-stimulated genes
and decreased expression of ribosomal proteins and translation factors. An shRNA
screen determined that the interferon-activated kinases JAK1 and TYK2 suppress
proliferation of trisomy 21 fibroblasts, and this defect is rescued by
pharmacological JAK inhibition. Therefore, we propose that interferon activation,
likely via increased gene dosage of the four interferon receptors encoded on
chromosome 21, contributes to many of the clinical impacts of trisomy 21, and
that interferon antagonists could have therapeutic benefits.