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Novel immunostimulatory phosphodiester oligodeoxynucleotides with CpT sequences instead of CpG motifs.
MedLine Citation:
PMID:  21529949     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The innate immune system recognizes bacterial DNA as a nonself to induce rapid immune activation. TLR9 recognizes synthetic oligodeoxynucleotides (ODNs) and bacterial DNA containing unmethylated CpG dinucleotides in the context of specific base sequences (CpG-DNA). Here, we demonstrate that phosphorothioate backbone CT-ODN (PS-CT-ODN), a derivative of phosphorothioate backbone CpG-DNA (PS-ODN) with CT sequences substituted for the CG sequences, stimulates IL-8 promoter activation and gene expression. Furthermore, we identified an immunostimulatory phosphodiester bond CT-ODN (PO-CT-ODN) from Staphylococcus aureus chromosomal DNA and found that the PO-CT-ODN induces cytokine production in a TLR9-dependent manner when encapsulated with a proper liposome. Our experimental analyses also demonstrate that the immunostimulatory PO-CT-ODN can act as an adjuvant for the induction of Ag-driven IgG production. Further investigation of the functional role of PO-CT-ODN may support the future application of PO-CT-ODN in immunotherapeutics.
Authors:
Dongbum Kim; Jinwon Jung; Younghee Lee; Hyung-Joo Kwon
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-27
Journal Detail:
Title:  Molecular immunology     Volume:  -     ISSN:  1872-9142     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-5-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7905289     Medline TA:  Mol Immunol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
Affiliation:
Department of Microbiology, College of Medicine, Hallym University, Gangwon-do 200-702, Republic of Korea.
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