Abstract：
:X-linked juvenile retinoschisis (XLRS) is a neurodevelopmental abnormality caused by retinoschisin gene mutations. XLRS is characterized by splitting through the retinal layers and impaired synaptic transmission of visual signals resulting in impaired acuity and a propensity to retinal detachment. Several groups have treated murine retinoschisis models successfully using adeno-associated virus (AAV) vectors. Owing to the fragile nature of XLRS retina, translating this therapy to the clinic may require an alternative to invasive subretinal vector administration. Here we show that all layers of the retinoschisin knockout (Rs1-KO) mouse retina can be transduced efficiently with AAV vectors administered by simple vitreous injection. Retinoschisin expression was restricted to the neuroretina using a new vector that uses a 3.5-kb human retinoschisin promoter and an AAV type 8 capsid. Intravitreal administration to Rs1-KO mice resulted in robust retinoschisin expression with a retinal distribution similar to that observed in wild-type retina, including the expression by the photoreceptors lying deep in the retina. No off-target expression was observed. Rs1-KO mice treated with this vector showed a decrease in the schisis cavities and had improved retinal signaling evaluated by recording the electroretinogram 11-15 weeks after the application.
journal_name
Gene Therjournal_title
Gene therapyauthors
Park TK,Wu Z,Kjellstrom S,Zeng Y,Bush RA,Sieving PA,Colosi Pdoi
10.1038/gt.2009.61subject
Has Abstractpub_date
2009-07-01 00:00:00pages
916-26issue
7eissn
0969-7128issn
1476-5462pii
gt200961journal_volume
16pub_type
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