GRFT + CI at varying HIV inhibition Effectb
50% 75% 95%
b12 mAb 0.84 ± 0.16 0.72 ± 0.11 0.66 ± 0.12 +++
2F5 mAb 1.02 ± 0.10 0.85 ± 0.10 0.80 ± 0.20 ++
2G12 mAb N.A.a N.A.a N.A.a N.A.a
AMD3100 0.60 ± 0.14 0.48 ± 0.12 0.46 ± 0.09 +++
BanLec 0.88 ± 0.02 0.79 ± 0.12 0.98 ± 0.09 Additivity
T20 0.97 ± 0.08 0.72 ± 0.05 0.55 ± 0.05 +++
PRO2000 0.75 ± 0.11 0.72 ± 0.11 0.78 ± 0.17 ++
aN.A.: not applicable
bEffect of drug interaction based at CI95%, whereby CI<0.9 are synergistic; 0.9<CI<1.1 are additive and CI>1.1 are antagonistic. The degree of synergy: 0.85<CI<0.9: + (slight synergy); 0.7<CI<0.85: ++ (moderate synergy); 0.3<CI<0.7: +++ (synergy); 0.1<0.3: ++++ (potent synergy).
Table 2: Combination index (CI) determination of GRFT/entry inhibitor combinations in the HIV-1 induced cell-cell assay (giant cell assay).
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