Lamivudine

Lamivudine (Epivir) is a potent nucleoside analog reverse transcriptase inhibitor with an IC50 of 2.7 mM.The pH-driven uptake of TEA by BBMV (pHin = 6.0, pHout = 7.5) was inhibited by lamivudine. The IC50 value (concentration resulting in 50% inhibition) for the concentration-dependent effect of lamivudine on TEA uptake by BBMV after 30 s was 2668 uM whereas IC50 values for cimetidine and trimethoprim were < 2.5 uM and < 25 uM, respectively. The early uptake of TEA by BLMV was also reduced significantly by lamivudine. The IC50 value for the concentration-dependent effect of lamivudine on uptake of TEA by BLMV at 30 s was > 25 mM, whereas the IC50 values for cimetidine and trimethoprim were 2116 uM and 445uM, respectively.