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. Author manuscript; available in PMC: 2013 Feb 15.
Published in final edited form as: J Am Chem Soc. 2011 Sep 9;134(6):2976–2980. doi: 10.1021/ja206867t

Table 1.

Inhibition of P-gp-mediated efflux in 12D7 T-cells and P-gp substrate binding competition in vitro

Compound IC50 (µM)
12D7-MDR
(Calcein-AM)
IC50 (µM)
12D7-MDR
(NBD-Aba)
IC50
[125I]IAAP
competition
abacavir > 500 > 500 >100 µM
AbaS2 4.8 ± 0.1 4.9 ± 0.4 170 ± 42 nM
AbaS2Me2 2.4 ± 0.1 2.1 ± 0.2 62 ± 24 nM
AbaS2Me4 0.6 ± 0.1 0.7 ± 0.1 65 ± 28 nM