Abolition of hCAR-dependent cell tropism using fiber knobs of Atadenovirus serotypes

Laurence Renaut, Morvane Colin, José P.G. Leite, Maria Benko, Jean Claude D'Halluin

Research output: Contribution to journalArticle

20 Citations (Scopus)


Most adenoviral vectors use in gene therapy protocols derive from species C. However, expression of the primary receptor (human Coxsackievirus and Adenovirus receptor, hCAR) for these AdV is variable on cancer cells. In vivo targeting of a therapeutic gene to specific cells has then become a major issue in gene therapy. The Ad fiber protein largely determines viral tropism through interaction with specific receptors. Hereto, we constructed a set of HAdV5 vectors carrying chimeric fibers with knob domains from nonhuman AdV, namely from the FAdV-1 (Aviadenovirus), DAdV-1, and BAdV-4 (Atadenovirus). Correspondents viruses were produced using an established new HEK293 cell line, which express the HAdV2 fiber. Recombinant HAdV harboring chimeric fibers constituted of the N-terminal domain of HAdV2, and knob domain of bovine adenovirus type 4 (BAdV-4) demonstrated the greatest reduction in fiber-mediated gene transfer into human cells expressing the hCAR. Moreover, this vector infects with a better efficiency than vector with wild-type fiber, the Chinese Hamster Ovarian (CHO) and SKOV3 cell lines, both from ovarian origin, hamster and human, respectively. These studies support the concept that changing the fiber knob domain to ablate hCAR interaction should result in a de- or retargeted adenoviral vector. The adenoviral vector with the chimeric HAdV2/BAdV-4 fiber lacking hCAR interaction and with an ovarian cell tropism could be a nice candidate to elaborate vectors for ovarian tumor therapy.

Original languageEnglish
Pages (from-to)189-204
Number of pages16
Issue number2
Publication statusPublished - Apr 10 2004



  • Adenovirus
  • Chimeric fiber
  • Gene therapy
  • Ovary
  • Receptor
  • Serotype
  • Tropism
  • hCAR

ASJC Scopus subject areas

  • Virology

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