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2016 ; 18
(6
): 769-781
Nephropedia Template TP
gab.com Text
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English Wikipedia
Identification and Correction of Mechanisms Underlying Inherited Blindness in
Human iPSC-Derived Optic Cups
#MMPMID27151457
Parfitt DA
; Lane A
; Ramsden CM
; Carr AF
; Munro PM
; Jovanovic K
; Schwarz N
; Kanuga N
; Muthiah MN
; Hull S
; Gallo JM
; da Cruz L
; Moore AT
; Hardcastle AJ
; Coffey PJ
; Cheetham ME
Cell Stem Cell
2016[Jun]; 18
(6
): 769-781
PMID27151457
show ga
Leber congenital amaurosis (LCA) is an inherited retinal dystrophy that causes
childhood blindness. Photoreceptors are especially sensitive to an intronic
mutation in the cilia-related gene CEP290, which causes missplicing and premature
termination, but the basis of this sensitivity is unclear. Here, we generated
differentiated photoreceptors in three-dimensional optic cups and retinal pigment
epithelium (RPE) from iPSCs with this common CEP290 mutation to investigate
disease mechanisms and evaluate candidate therapies. iPSCs differentiated
normally into RPE and optic cups, despite abnormal CEP290 splicing and cilia
defects. The highest levels of aberrant splicing and cilia defects were observed
in optic cups, explaining the retinal-specific manifestation of this CEP290
mutation. Treating optic cups with an antisense morpholino effectively blocked
aberrant splicing and restored expression of full-length CEP290, restoring normal
cilia-based protein trafficking. These results provide a mechanistic
understanding of the retina-specific phenotypes in CEP290 LCA patients and
potential strategies for therapeutic intervention.