A) Mice with corneal transplants were treated with subconjunctival injections of either endostatin or PBS (control) from postoperative day (POD) 0 to POD30. In the PBS-treated group, the allografts started to be rejected at POD27. By POD40, 6 of 10 allografts in the PBS group had been rejected. In contrast, all allografts in the endostatin-treated group survived through POD40 (p < 0.01, n = 10). (B) All syngeneic grafts survived in both treatment groups. (C) Exogenous endostatin or PBS was administered to mice from POD20, when the allografts were vascularized, to POD50. By POD60, 75% of the allografts had been rejected, and there was no significant difference between the PBS-treated group and the endostatin-treated group (p > 0.05).182 (Adapted from Tan et al with permission)