ABSTRACT
Meshed pigmented iris epithelium along with neural retina of tadpoles of the frog Euphlyctis cyanophlyctis were found to undergo dedifferentiation and subsequently transdifferentiate into lens in culture medium. During lag period, depigmentation (dedifferentiation) occurred in many cells. When culture became confluent 3-4 weeks after seeding tiny lens like structures differentiated from foci of cultured pigmented iris epithelium cells. The percentage of lens formation was higher in vitamin A treated cases. The culture system appears to be a suitable for investigating the changes occurred during trans-differentiation of pigmented epithelial cells into lens.
Subject(s)
Animals , Cell Transdifferentiation/drug effects , Iris/cytology , Iris/drug effects , Larva/cytology , Larva/growth & development , Lens, Crystalline/cytology , Lens, Crystalline/drug effects , Lens, Crystalline/growth & development , Pigment Epithelium of Eye/cytology , Pigment Epithelium of Eye/drug effects , Ranidae/anatomy & histology , Ranidae/growth & development , Tissue Culture Techniques , Vitamin A/pharmacologyABSTRACT
Emblica officinalis (Amla) accelerated cell proliferation and dedifferentiation of pigmented epithelial cells of dorsal iris and consequently induced lens regeneration in R. cyanophlyctis. Further it enhanced the percentage of lens regeneration not only in young tadpoles but also is adult frogs. Lens regeneration ability declined with the age of animals in both control as well as treated groups.