Ganglion cells in diabetic retinas express several proapoptosis molecules, suggesting that these cells are the most vulnerable population. Glial cells in diabetic retinas are activated and express several antiapoptosis molecules in addition to the cytotoxic effector molecule FasL, suggesting a possible role of glial cells in induction of apoptosis in ganglion cells.

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These results demonstrate an increase in the expression of RANTES, eotaxin, MCP-1, and MCP-3 in the conjunctiva of patients with VKC compared with control subjects. These data suggest a potential role for these chemokines in the pathogenesis of VKC. Antagonists of chemokine receptors may provide new therapeutic modalities in VKC.