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2017 ; 2
(6
): e91782
Nephropedia Template TP
gab.com Text
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English Wikipedia
Intranasal siRNA administration reveals IGF2 deficiency contributes to impaired
cognition in Fragile X syndrome mice
#MMPMID28352664
Pardo M
; Cheng Y
; Velmeshev D
; Magistri M
; Eldar-Finkelman H
; Martinez A
; Faghihi MA
; Jope RS
; Beurel E
JCI Insight
2017[Mar]; 2
(6
): e91782
PMID28352664
show ga
Molecular mechanisms underlying learning and memory remain imprecisely
understood, and restorative interventions are lacking. We report that intranasal
administration of siRNAs can be used to identify targets important in cognitive
processes and to improve genetically impaired learning and memory. In mice
modeling the intellectual deficiency of Fragile X syndrome, intranasally
administered siRNA targeting glycogen synthase kinase-3? (GSK3?), histone
deacetylase-1 (HDAC1), HDAC2, or HDAC3 diminished cognitive impairments. In WT
mice, intranasally administered brain-derived neurotrophic factor (BDNF) siRNA or
HDAC4 siRNA impaired learning and memory, which was partially due to reduced
insulin-like growth factor-2 (IGF2) levels because the BDNF siRNA- or HDAC4
siRNA-induced cognitive impairments were ameliorated by intranasal IGF2
administration. In Fmr1(-/-) mice, hippocampal IGF2 was deficient, and learning
and memory impairments were ameliorated by IGF2 intranasal administration.
Therefore intranasal siRNA administration is an effective means to identify
mechanisms regulating cognition and to modulate therapeutic targets.
|Administration, Intranasal
[MESH]
|Animals
[MESH]
|Cognition Disorders/*genetics/psychology
[MESH]
|Fragile X Mental Retardation Protein/genetics
[MESH]