Objective:To investigate the effect of Shuangdan Mingmu capsules on the mRNA expression of Akt and en- dothelial nitric oxide synthase (eNOS) in a rat model of diabetic retinopathy. Methods:A total of 33 GK rats were used to establish a model of diabetic retinopathy and then they were randomly divided into positive drug control group, Shuangdan Mingmu capsule group (12.5 ml/kg) ,and model group,with 11 rats in each group. Another 11 healthy Wistar rats were included in blank group. The rats were treated with the drug by gavage since one w...