Table 2

Apical/basolateral 1′-OH MDZ concentration ratios

Time After DoseApical Dose A/B RatioBasolateral Dose A/B Ratio
min
201.82.2
302.82.3
453.82.7
601.62.4
901.62.0
1202.92.0
Mean2.42.3
S.D.0.900.27

Caco-2 monolayers were treated with 3 μM MDZ in either the apical or basolateral compartment. Total 1′-OH MDZ was measured in the apical and basolateral medium after incubating for the indicated period of time. Each ratio represents the result obtained from a single culture.