Methods for the treatment and prevention of age-related retinal dysfunction
A method of treating or preventing age-related retinal dysfunction involves administering to a patient a pharmaceutically effective amount of a synthetic retinal derivative repeatedly over a duration of at least about 3 months. Effective synthetic retinal derivatives include 9-cis-retinyl esters, 11-cis-retinyl esters, derivatives and congeners thereof, and combinations thereof. Suitable ester substituents include carboxylates of C 1 -C 10 monocarboxylic acids and C 2 -C 22 polycarboxylic acids.
1. A method of treating age-related impairment in rod-mediated dark adaptation after light exposure, comprising:
administering to a subject in need thereof a pharmaceutically effective amount of a synthetic retinal derivative, wherein said synthetic retinal derivative is administered intermittently about once a month over a period of at least four months, and wherein the synthetic retinal derivative has a structure represented by Formula I:
wherein A is CH 2 OR, wherein R is the ester forming portion of a C 1 to C 10 monocarboxylic acid or a C 2 to C 22 polycarboxylic acid.
2. The method of claim 1 , wherein said synthetic retinal derivative is administered to said subject over a period of at least six months.
3. The method of claim 1 , wherein said retinal derivative is administered to said subject about once a month over a period of at least ten months.
4. The method of claim 1 , wherein said ester substituent is a carboxylate radical of a polycarboxylic acid of C 3 to C 10 .
5. The method of claim 1 , wherein said synthetic retinal derivative is selected from the group consisting of 9-cis-retinyl acetate, 9-cis-retinyl succinate, 9-cis-retinyl citrate, 9-cis-retinyl ketoglutarate, 9-cis-retinyl fumarate, 9-cis-retinyl malate and 9-cis-retinyl oxaloacetate.
6. The method of claim 5 , wherein said synthetic retinal derivative is 9-cis-retinyl acetate.
7. The method of claim 1 , wherein said subject is a human.
8. The method of claim 1 , wherein said synthetic retinal derivative is orally administered.
9. The method of claim 1 , wherein said synthetic retinal derivative is locally administered to the subject's eye.
10. The method of claim 9 , wherein said synthetic retinal derivative is administered via eye drops, an intraocular injectable solution or a periocular injectable solution.
11. The method of claim 1 , wherein the administering comprises administering a dosage greater than an effective daily dose.
12. The method of claim 5 , wherein said synthetic retinal derivative is 9-cis-retinyl succinate.
13. The method of claim 8 , wherein the synthetic retinal derivative administered per dose is between about 0.1 to about 1000 mg.
14. The method of claim 8 , wherein the synthetic retinal derivative administered per dose is about 1.0 to about 300 mg.
15. The method of claim 8 , wherein the synthetic retinal derivative administered per dose is between about 0.1 mg/kg to 10 mg/kg, wherein mg/kg is mg of the synthetic retinal derivative per kg body weight of the subject.
16. The method of claim 10 , wherein said administering comprises administration as eye drops wherein a single dose per administration provides between about 0.01 mg to about 90 mg of the synthetic retinal derivative.
17. The method of claim 10 , wherein said administering comprises administration of an intraocular injectable solution wherein each injection provides between about 0.0001 mg to about 500 mg of the synthetic retinal derivative.
18. The method of claim 10 , wherein said administering comprises administration of a periocular injectable solution, wherein each injection provides between about 0.0001 mg to about 500 mg of the synthetic retinal derivative.