Dose Escalation Study of Cyclophosphamide in HIV-Infected Subjects on HAART Receiving SB-728-T

Infusion will be 5 to 30 billion ZFN modified CD4+ T cells 1 day following IV cyclophosphamide 200 mg

Infusion will be 5 to 30 billion ZFN modified CD4+ T cells up to 3 days following IV cyclophosphamide 0.5 g/m2

Infusion will be 5 to 30 billion ZFN modified CD4+ T cells up to 3 days following IV cyclophosphamide 1.0 g/m2

Infusion will be 5 to 30 billion ZFN modified CD4+ T cells up to 3 days following IV cyclophosphamide 2.0 g/m2

Infusion will be 5 to 30 billion ZFN modified CD4+ T cells up to 3 days following IV cyclophosphamide 1.5 g/m2