|Figure 1: Fold of MDR1A/B gene expression in A) NRK-52E, B) Non-Rifampin treated LL-CPK1 and
C) Rifampin-treated LL-CPK1 cells. Cells were exposed to either medium-only or 20%
NL or 20% HL serum for 24 h (Fed), then serum was removed and cells were starved for
24 h (Starved). Two-way analysis of variance followed by Holm-Sidak test was used
to assess differences in MDR1A/B mRNA. Groups under the same line are statistically
equivalent, $ indicate significant difference from the respective serum-fed cells,
and different letters indicate significant difference between different sera.