Immunologic Research

, Volume 39, Issue 1–3, pp 4–14

Structural requirements and applications of inhibitory oligodeoxyribonucleotides



Synthetic oligodeoxyribonucleotides (ODN) bearing certain sequence characteristics mimic bacterial DNA by activating B cells and dendritic cells through Toll-like receptor (TLR) 9, an event that potentiates both humoral and cell-mediated immunity. ODN sharing some of the sequence characteristics of strong stimulatory (ST-) ODN, but substituting GGG for CGTT, competitively inhibit ST-ODN-driven events. An ODN with the same length and base composition as a strong ST-ODN, but lacking both ST- and IN-sequence requirements, has neither ST- nor IN-activity. Whereas, certain sequence changes strongly influence ST-ODN activity in human cells relative to mouse cells and B cells relative to non B cells, the strongest IN-ODN appear to work well in both species and multiple cell types. Converting from the natural phosphodiester backbone to a nuclease-resistant phosphorothioate backbone increases the sensitivity to ST-ODN about 2 logs and to IN-ODN 3 logs, while increasing the impact of critical base changes in ST-ODN and diminishing it in IN-ODN. Examples where IN-ODN have been used in vivo to interrupt autoimmune and other TLR-9-induced inflammatory states are described.


Inhibitory oligonucleotides TLR9 Stimulatory oligonucleotides Autoimmunity Bacterial DNA 

Copyright information

© Humana Press Inc. 2007

Authors and Affiliations

  1. 1.Graduate Program in Immunology, Carver College of MedicineUniversity of IowaIowa CityUSA
  2. 2.Department of Internal Medicine, Carver College of MedicineUniversity of IowaIowa CityUSA

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