Novel Pol II fusion promoter directs human immunodeficiency virus type 1-inducible coexpression of a short hairpin RNA and protein

Hoshang J. Unwalla, Hai Tang Li, Ingrid Bahner, Ming Jie Li, Donald Kohn, John J. Rossi

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42 Scopus citations


We demonstrate a novel approach for coexpression of a short hairpin RNA (shRNA) with an open reading frame which exploits transcriptional read-through of a minimal polyadenylation signal from a Pol II promoter. We first observed efficient inducible expression of enhanced green fluorescent protein along with an anti-rev shRNA. We took advantage of this observation to test coexpression of the transdominant negative mutant (humanized) of human immunodeficiency type 1 (HIV-1) Rev (huRevM10) along with an anti-rev shRNA via an HIV-1-inducible fusion promoter. The coexpression of the shRNA and transdominant protein resulted in potent, long-term inhibition of HIV-1 gene expression and suppression of shRNA-resistant mutants. This dual expression system has broad-based potential for other shRNA applications, such as cases where simultaneous knockdown of mutant and wild-type transcripts must be accompanied by replacement of the wild-type protein.

Original languageEnglish (US)
Pages (from-to)1863-1873
Number of pages11
JournalJournal of virology
Issue number4
StatePublished - Feb 1 2006


ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

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