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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Invest+Dermatol
2016 ; 136
(11
): 2251-2259
Nephropedia Template TP
gab.com Text
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English Wikipedia
AP1S3 Mutations Cause Skin Autoinflammation by Disrupting Keratinocyte Autophagy
and Up-Regulating IL-36 Production
#MMPMID27388993
Mahil SK
; Twelves S
; Farkas K
; Setta-Kaffetzi N
; Burden AD
; Gach JE
; Irvine AD
; Képíró L
; Mockenhaupt M
; Oon HH
; Pinner J
; Ranki A
; Seyger MMB
; Soler-Palacin P
; Storan ER
; Tan ES
; Valeyrie-Allanore L
; Young HS
; Trembath RC
; Choon SE
; Szell M
; Bata-Csorgo Z
; Smith CH
; Di Meglio P
; Barker JN
; Capon F
J Invest Dermatol
2016[Nov]; 136
(11
): 2251-2259
PMID27388993
show ga
Prominent skin involvement is a defining characteristic of autoinflammatory
disorders caused by abnormal IL-1 signaling. However, the pathways and cell types
that drive cutaneous autoinflammatory features remain poorly understood. We
sought to address this issue by investigating the pathogenesis of pustular
psoriasis, a model of autoinflammatory disorders with predominant cutaneous
manifestations. We specifically characterized the impact of mutations affecting
AP1S3, a disease gene previously identified by our group and validated here in a
newly ascertained patient resource. We first showed that AP1S3 expression is
distinctively elevated in keratinocytes. Because AP1S3 encodes a protein
implicated in autophagosome formation, we next investigated the effects of gene
silencing on this pathway. We found that AP1S3 knockout disrupts keratinocyte
autophagy, causing abnormal accumulation of p62, an adaptor protein mediating
NF-?B activation. We showed that as a consequence, AP1S3-deficient cells
up-regulate IL-1 signaling and overexpress IL-36?, a cytokine that is emerging as
an important mediator of skin inflammation. These abnormal immune profiles were
recapitulated by pharmacological inhibition of autophagy and verified in patient
keratinocytes, where they were reversed by IL-36 blockade. These findings show
that keratinocytes play a key role in skin autoinflammation and identify
autophagy modulation of IL-36 signaling as a therapeutic target.
|*Mutation
[MESH]
|*Up-Regulation
[MESH]
|Adaptor Proteins, Signal Transducing/*genetics/metabolism
[MESH]