BioDrugs

, Volume 23, Issue 6, pp 361–375

CpG Oligodeoxynucleotides as TLR9 Agonists

Therapeutic Applications in Cancer
  • Yanal M. Murad
  • Timothy M. Clay
Review Article

DOI: 10.2165/11316930-000000000-00000

Cite this article as:
Murad, Y.M. & Clay, T.M. BioDrugs (2009) 23: 361. doi:10.2165/11316930-000000000-00000

Abstract

Toll-like receptors (TLRs) are part of the innate immune system, and they belong to the pattern recognition receptors (PRR) family. The PRR family is designed to recognize and bind conserved pathogen-associated molecular patterns, which are not generated by the host and are restricted and essential to microorganisms. TLR9, which recognizes unmethylated CpG (cytosine guanosine dinucleotide), is a very promising target for therapeutic activation. Stimulation of TLR9 activates human plasmacytoid dendritic cells and B cells, and results in potent T helper-1 (Th1)-type immune responses and antitumor responses in mouse tumor models and in patients.

Several pharmaceutical companies, such as Pfizer, Idera, and Dynavax, are developing CpG oligodeoxynucleotides (ODNs) for the treatment of cancer, along with other conditions, such as infections and allergy. CpG ODNs have shown promising results as vaccine adjuvants and in combination with cancer immunotherapy. Several TLR9 agonists are being developed and have entered clinical trials to evaluate their safety and efficacy for the treatment of several hematopoietic and solid tumors. In this review, we discuss the use of CpG ODNs in several phase I and II clinical trials for the treatment of NHL, renal cell carcinoma, melanoma, and non-small cell lung cancer, either alone or in combination with other agents.

Copyright information

© Adis Data Information BV 2009

Authors and Affiliations

  • Yanal M. Murad
    • 1
  • Timothy M. Clay
    • 1
  1. 1.Department of Surgery, Program in Molecular Therapeutics, Comprehensive Cancer CenterDuke University Medical CenterDurhamUSA

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