In-vitro Hydrolysis, Permeability, and Ocular Uptake of Prodrugs of <i>N</i>-[4-(Benzoylamino)phenylsulfonyl]glycine, a Novel Aldose Reductase Inhibitor
作者:Gangadhar Sunkara、Jack DeRuiter、C Randall Clark、Uday B Kompella
DOI:10.1211/0022357001774877
日期:2010.2.18
218.9 x 10(-3) h(-1) for the methyl ester and from 3.14 to 4.45 x 10(-3) h(-1) for the isopropyl ester. At all pH conditions, the isopropyl ester was more stable when compared with the methyl ester. A change in buffer concentration at pH 7.4 did not influence the stability of the prodrugs. The prodrugs were rapidly hydrolysed in the tissue homogenates, with the rate constants for hydrolysis ranging
为了增强N- [4-(苯甲酰基氨基)苯基磺酰基]甘氨酸(BAPSG)的眼吸收能力,合成了两种酯(甲基和异丙基)前药并评估了它们在各种缓冲液(pH 1-9)中的稳定性,在兔眼中的水解组织(角膜,结膜,虹膜睫状体,晶状体,房水和玻璃体液),跨角膜和结膜的运输以及局部给药后的体内摄取。在1-9的pH范围内,甲基丙烯酸酯的降解速率常数为5.67至218.9 x 10(-3)h(-1),而甲基丙烯酸酯的降解速率常数为3.14至4.45 x 10(-3)h(-1)用于异丙酯。在所有pH条件下,与甲基酯相比,异丙酯都更稳定。pH 7.4时缓冲液浓度的变化不会影响前药的稳定性。前药在组织匀浆中迅速水解,甲酯的水解速率常数范围为1.98至7.2x 10(-3)min(-1),异丙酯的水解速率常数范围为3.32至6.53 x 10(-3)min(-1)。甲酯在角膜和结膜中的体外渗透性小于母体药物。即使在4小时