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. 2013 Oct;57(10):4982–4989. doi: 10.1128/AAC.00712-13

Table 2.

Effect of COBI, emtricitabine, and elvitegravir on the cytotoxicity of TFV in human RPTECs

Compound CC50 [μM]a for:
Cell viability LDH release
TFV >4,000 >4,000
COBI 26.2 ± 5.3 39.4 ± 0.8
Elvitegravir 13.7 ± 0.1 32.7 ± 0.1
Emtricitabine >100 >100
TFV + COBI (2 μM)b >4,000 >4,000
TFV + COBI (2 μM) + elvitegravir (4.5 μM) + emtricitabine (8 μM)b >4,000 >4,000
a

The results represent means ± SD from 4 independent experiments performed in RPTECs from 2 independent donors. CC50 values were determined in parallel from cell viability readout (CellTiter Glo) and from lactate dehydrogenase (LDH) release readout.

b

The tested concentrations of COBI, elvitegravir, and emtricitabine correspond to peak plasma levels (Cmax) in HIV-infected patients treated with a clinical dose of each compound (31, 32).