Abstract
An UV spectrophotometric method and a high-performance liquid chromatographic (HPLC) method were developed for the determination of tolrestat, a novel aldose reductase inhibitor, in serum. The limits of detection of the methods are 15 and 0.2 .mu.g/ml, respectively. With human serum, a modification of the HPLC method provides sensitivity to 25 ng/ml. The specificity of the methods were compared. The HPLC method can be applied to the lens and the sciatic nerve. [Tolrestat can effectively reduce the accumulation of dulcitol in the lens and sciatic nerve of galactosemic rats, and can also reduce tissue levels of sorbitol in streptozotocin diabetic rats.].

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