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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+Interferon+Cytokine+Res
2017 ; 37
(5
): 214-219
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MDA5-Associated Neuroinflammation and the Singleton-Merten Syndrome: Two Faces of
the Same Type I Interferonopathy Spectrum
#MMPMID28475458
Buers I
; Rice GI
; Crow YJ
; Rutsch F
J Interferon Cytokine Res
2017[May]; 37
(5
): 214-219
PMID28475458
show ga
In 1973, Singleton and Merten described a new syndrome in 2 female probands with
aortic and cardiac valve calcifications, early loss of secondary dentition, and
widened medullary cavities of the phalanges. In 1984, Aicardi and Goutières
defined a phenotype resembling congenital viral infection with basal ganglia
calcification and increased protein content in the cerebrospinal fluid. Between
2006 and 2012, mutations in 6 different genes were described to be associated
with Aicardi-Goutières syndrome, specifically-TREX1, RNASEH2A, RNASEH2B,
RNASEH2C, ADAR, and SAMHD1. More recently, mutations in IFIH1 were reported in a
variety of neuroimmunological phenotypes, including Aicardi-Goutières syndrome,
while a specific Arg822Gln mutation in IFIH1 was described in 3 discrete families
with Singleton-Merten syndrome (SMS). IFIH1 encodes for melanoma
differentiation-associated gene 5 (MDA5), and all mutations identified to date
have been associated with an enhanced interferon response in affected
individuals. In this study, we present a male child demonstrating recurrent
febrile episodes, spasticity, and basal ganglia calcification suggestive of
Aicardi-Goutières syndrome, who carries the same Arg822Gln mutation in IFIH1
previously associated with SMS. We conclude that both diseases are part of the
interferonopathy grouping and that the Arg822Gln mutation in IFIH1 can cause a
spectrum of disease, including neurological involvement.