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2018 ; 3
(3
): ä Nephropedia Template TP
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Virus-like infection induces human ? cell dedifferentiation
#MMPMID29415896
Oshima M
; Knoch KP
; Diedisheim M
; Petzold A
; Cattan P
; Bugliani M
; Marchetti P
; Choudhary P
; Huang GC
; Bornstein SR
; Solimena M
; Albagli-Curiel O
; Scharfmann R
JCI Insight
2018[Feb]; 3
(3
): ä PMID29415896
show ga
Type 1 diabetes (T1D) is a chronic disease characterized by an
autoimmune-mediated destruction of insulin-producing pancreatic ? cells.
Environmental factors such as viruses play an important role in the onset of T1D
and interact with predisposing genes. Recent data suggest that viral infection of
human islets leads to a decrease in insulin production rather than ? cell death,
suggesting loss of ? cell identity. We undertook this study to examine whether
viral infection could induce human ? cell dedifferentiation. Using the functional
human ? cell line EndoC-?H1, we demonstrate that polyinosinic-polycytidylic acid
(PolyI:C), a synthetic double-stranded RNA that mimics a byproduct of viral
replication, induces a decrease in ? cell-specific gene expression. In parallel
with this loss, the expression of progenitor-like genes such as SOX9 was
activated following PolyI:C treatment or enteroviral infection. SOX9 was induced
by the NF-?B pathway and also in a paracrine non-cell-autonomous fashion through
the secretion of IFN-?. Lastly, we identified SOX9 targets in human ? cells as
potentially new markers of dedifferentiation in T1D. These findings reveal that
inflammatory signaling has clear implications in human ? cell dedifferentiation.