Modulating expression of an endogenous cellular gene in a cell comprises contacting a first target site in the endogenous cellular gene with a first zinc finger protein (ZFP). ACTIVITY : Cytostatic; vasotropic; antidiabetic; antirheumatic; antiarthritic; antipsoriatic; virucide; antianemia; nootropic; neuroprotective; anti-cystic fibrosis; cerebroprotective. No biological data given. MECHANISM OF ACTION : Gene therapy.