Pineal-regulating tetrapeptide epitalon improves eye retina condition in retinitis pigmentosa. Khavinson V, Razumovsky M, Trofimova S, Grigorian R, Razumovskaya A. Clinical Trial 2002; 23(4): 365-368 PubMed PMID: 12195242 Keywords: Adolescent, Adult, Aged, Animals, Electric Conductivity, Electroretinography, Humans, Middle Aged, Oligopeptides:administration & dosage, Pineal Gland:drug effects, Rats, Rats, Inbred Strains, Retina:pathology, Retinitis Pigmentosa:drug therapy,. Citation : We have studied the effect of tetrapeptide Epitalon (Ala-Glu-Asp-Gly) on the course of congenital pigmented degeneration of the retina. ..... Read abstract