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2017 ; 114
(37
): E7766-E7775
Nephropedia Template TP
gab.com Text
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English Wikipedia
NLRP3 mutation and cochlear autoinflammation cause syndromic and nonsyndromic
hearing loss DFNA34 responsive to anakinra therapy
#MMPMID28847925
Nakanishi H
; Kawashima Y
; Kurima K
; Chae JJ
; Ross AM
; Pinto-Patarroyo G
; Patel SK
; Muskett JA
; Ratay JS
; Chattaraj P
; Park YH
; Grevich S
; Brewer CC
; Hoa M
; Kim HJ
; Butman JA
; Broderick L
; Hoffman HM
; Aksentijevich I
; Kastner DL
; Goldbach-Mansky R
; Griffith AJ
Proc Natl Acad Sci U S A
2017[Sep]; 114
(37
): E7766-E7775
PMID28847925
show ga
The NLRP3 inflammasome is an intracellular innate immune sensor that is expressed
in immune cells, including monocytes and macrophages. Activation of the NLRP3
inflammasome leads to IL-1? secretion. Gain-of-function mutations of NLRP3 result
in abnormal activation of the NLRP3 inflammasome, and cause the autosomal
dominant systemic autoinflammatory disease spectrum, termed cryopyrin-associated
periodic syndromes (CAPS). Here, we show that a missense mutation, p.Arg918Gln
(c.2753G > A), of NLRP3 causes autosomal-dominant sensorineural hearing loss in
two unrelated families. In family LMG446, hearing loss is accompanied by
autoinflammatory signs and symptoms without serologic evidence of inflammation as
part of an atypical CAPS phenotype and was reversed or improved by IL-1? blockade
therapy. In family LMG113, hearing loss segregates without any other target-organ
manifestations of CAPS. This observation led us to explore the possibility that
resident macrophage/monocyte-like cells in the cochlea can mediate local
autoinflammation via activation of the NLRP3 inflammasome. The NLRP3 inflammasome
can indeed be activated in resident macrophage/monocyte-like cells in the mouse
cochlea, resulting in secretion of IL-1?. This pathway could underlie treatable
sensorineural hearing loss in DFNA34, CAPS, and possibly in a wide variety of
hearing-loss disorders, such as sudden sensorineural hearing loss and Meniere's
disease that are elicited by pathogens and processes that stimulate innate immune
responses within the cochlea.