Abstract
Administration of glucocorticoids induces transient cataract in 15-day-old chick embryos within 48 hr, and the opaque lens again becomes clear within the subsequent 48 hr. Oxidative stress is likely to be involved in the process of cataract formation, resulting in the appearance of numerous vacuoles around the perinuclear region. Chick lens contained low amounts of glycosphingolipids, which mainly consists of GM3, GD3, sialyl-LewisXgangliosides and glucosylceramide. Most lens gangliosides were immunohistochemically detected in lens epithelia, annular pads and developing fibers, but not in perinuclear and nuclear regions. Since cell surface gangliosides, for example GM3 and sialyl-LewisXgangliosides, are involved in cell adhesion, weak cell-to-cell interactions in the perinuclear and nuclear regions may allow vacuole formation in steroid-induced cataractogenesis.
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