T Cell-Specific siRNA Delivery Suppresses HIV-1 Infection in Humanized Mice

Priti Kumar, Hong Seok Ban, Sang Soo Kim, Haoquan Wu, Todd Pearson, Dale L. Greiner, Amale Laouar, Jiahong Yao, Viraga Haridas, Katsuyoshi Habiro, Yong Guang Yang, Ji Hoon Jeong, Kuen Yong Lee, Yong Hee Kim, Sung Wan Kim, Matthias Peipp, Georg H. Fey, N. Manjunath, Leonard D. Shultz, Sang Kyung LeePremlata Shankar

Research output: Contribution to journalArticlepeer-review

Abstract

Evaluation of the therapeutic potential of RNAi for HIV infection has been hampered by the challenges of siRNA delivery and lack of suitable animal models. Using a delivery method for T cells, we show that siRNA treatment can dramatically suppress HIV infection. A CD7-specific single-chain antibody was conjugated to oligo-9-arginine peptide (scFvCD7-9R) for T cell-specific siRNA delivery in NOD/SCIDIL2rγ-/- mice reconstituted with human lymphocytes (Hu-PBL) or CD34+ hematopoietic stem cells (Hu-HSC). In HIV-infected Hu-PBL mice, treatment with anti-CCR5 (viral coreceptor) and antiviral siRNAs complexed to scFvCD7-9R controlled viral replication and prevented the disease-associated CD4 T cell loss. This treatment also suppressed endogenous virus and restored CD4 T cell counts in mice reconstituted with HIV+ peripheral blood mononuclear cells. Moreover, scFvCD7-9R could deliver antiviral siRNAs to naive T cells in Hu-HSC mice and effectively suppress viremia in infected mice. Thus, siRNA therapy for HIV infection appears to be feasible in a preclinical animal model.

Original languageEnglish (US)
Pages (from-to)577-586
Number of pages10
JournalCell
Volume134
Issue number4
DOIs
StatePublished - Aug 22 2008
Externally publishedYes

Keywords

  • CELLIMMUNO
  • HUMDISEASE

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology

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