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Therapeutic potential of valproic acid for retinitis pigmentosa

Therapeutic potential of valproic acid for retinitis pigmentosa,10.1136/bjo.2009.175356,British Journal of Ophthalmology,C. M. Clemson,R. Tzekov,M. Kr

Therapeutic potential of valproic acid for retinitis pigmentosa   (Citations: 4)
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Background/aimTo examine the efficacy and safety of valproic acid (VPA) in patients with retinitis pigmentosa (RP).MethodsThirteen eyes were examined before and after brief treatment (average 4 months) with VPA. Visual fields (VF) for each eye were defined using digitised Goldmann Kinetic Perimetry tracings. VF areas were log-transformed and VF loss/gain relative to baseline was calculated. Visual acuity was measured using a Snellen chart at a distance of 20 feet (6.1 m). Values were converted to the logarithm of the minimum angle of resolution (logMAR) score.ResultsNine eyes had improved VF with treatment, two eyes had decreased VF and two eyes experienced no change, with an overall average increase of 11%. Assuming typical loss in VF area without treatment, this increase in VF was statistically significant (p<0.02). An average decrease (0.172) in the logMAR scores was seen in these 13 eyes, which translates to a positive change in Snellen score of approximately 20/47 to 20/32, which was significant (p<0.02) assuming no loss in acuity without treatment. Side effects were mild and well tolerated.ConclusionTreatment with VPA is suggestive of a therapeutic benefit to patients with RP. A placebo-controlled clinical trial will be necessary to assess the efficacy and safety of VPA for RP rigorously.
Journal: British Journal of Ophthalmology - BRIT J OPHTHALMOL , vol. 95, no. 1, pp. 89-93, 2010
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