Insulin-like immunoreactivity in human retinoblastoma Y79 cell line

Cells from the Y79 human retinoblastoma cell line were examined by immunofluorescence immunocytochemistry using an antiserum against insulin. All the cells showed intense staining, indicating the presence of insulin-like immunoreactivity in these cells. Our observations suggest that insulin may play an important role in the metabolism of retinoblastoma cells and that it may be possible to use this cell line as an in vitro model for studies on the action of insulin in the metabolism of human retinal cells.