| 主权项 |
1. An isolated cell population produced by:
harvesting human retinal tissue at a stage after which the retina is formed but before photoreceptor outer segments are fully formed throughout the retina and before retinal vascularization substantially completed or completed, wherein the tissues are harvested from a human retina at a gestational age between about 12 weeks to about 28 weeks; dissociating the harvested tissues mechanically and enzymatically to generate a dissociated suspension of cells and cell clusters; and culturing the dissociated suspension of cells at atmospheric oxygen level or at low oxygen conditions that mimic oxygen levels of a developing fetal retina during gestation, or under hypoxic conditions, in serum free culture medium in culture flasks or plates coated with a xeno-free fibronectin, an ornithine, a polylysine, a laminin, or an equivalent thereof, for about 10 to 30 passages: wherein after the culturing the human retinal progenitor cells express one or more markers selected from the group consisting of nestin, Sox2, Ki-67, MHC Class I, and Fas/CD95, wherein nestin is expressed by greater than 90% of the cells in the population, wherein Sox2 is expressed by greater than 80% of the cells in the population, wherein Ki-67 is expressed by greater than 30% of the cells in the population, wherein MHC Class I is expressed by greater than 70% of the cells in the population, and wherein Fas/CD95 is expressed by greater than 30% of the cells in the population, thereby making an isolated cell population wherein cells in the population express one or more markers selected from the group consisting of nestin, Sox2, Ki-67, MHC Class I, and Fas/CD95. |
