A double transdominant fusion gene (trev) designed to inhibit two esse
ntial HIV functions simultaneously was constructed by linking tar and
rev transdominant mutants. Trev independently inhibited both Tai and R
ev functions, localized within the nucleus and cells transfected with
trev showed a stable inhibition of HIV-1-mediated cytopathicity. A ret
roviral vector of trev was made and shown also to confer protection fr
om HIV cytopathic effects. Simultaneous inhibition of two essential vi
ral genes presents significant advantages for potential gene therapy t
reatment of HIV infection over conventional single effect molecules.