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2016 ; 60
(ä): 83-7
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English Wikipedia
PEHO Syndrome May Represent Phenotypic Expansion at the Severe End of the
Early-Onset Encephalopathies
#MMPMID27343026
Gawlinski P
; Posmyk R
; Gambin T
; Sielicka D
; Chorazy M
; Nowakowska B
; Jhangiani SN
; Muzny DM
; Bekiesinska-Figatowska M
; Bal J
; Boerwinkle E
; Gibbs RA
; Lupski JR
; Wiszniewski W
Pediatr Neurol
2016[Jul]; 60
(ä): 83-7
PMID27343026
show ga
BACKGROUND: Progressive encephalopathy with edema, hypsarrhythmia and optic
atrophy (PEHO) syndrome is a distinct neurodevelopmental disorder. Patients
without optic nerve atrophy and brain imaging abnormalities but fulfilling other
PEHO criteria are often described as a PEHO-like syndrome. The molecular bases of
both clinically defined conditions remain unknown in spite of the widespread
application of genome analyses in both clinic and research. METHODS: We enrolled
two patients with a prior diagnosis of PEHO and two individuals with PEHO-like
syndrome. All four individuals subsequently underwent whole-exome sequencing and
comprehensive genomic analysis. RESULTS: We identified disease-causing mutations
in known genes associated with neurodevelopmental disorders including GNAO1 and
CDKL5 in two of four individuals. One patient with PEHO syndrome and a de
novoGNAO1 mutation was found to have an additional de novo mutation in HESX1 that
is associated with optic atrophy. CONCLUSIONS: We hypothesize that PEHO and
PEHO-like syndrome may represent a severe end of the spectrum of the early-onset
encephalopathies and, in some instances, its complex phenotype may result from an
aggregated effect of mutations at two loci.