An oligodeoxynucleotide with CCT repeats restrains CpG ODN-induced TLR9 trafficking.

Abstract:

:Toll-like receptor 9 (TLR9) can sense pathogen DNA and CpG ODN or even self-DNA by trafficking assisted by Unc93B1, an endoplasmic reticulum (ER) transmembrane protein, from ER to endolysosomes or cell surface. In previous study, we found that an oligodeoxynucleotide with CCT repeats (SAT05f) could selectively inhibit TLR7/9 activation. However, the mechanism for the inhibitory activity of SAT05f is still unknown. In present research, it was found that SAT05f could inhibit CpG ODN-induced the intracellular trafficking of TLR9 and Unc93B1 with feedback the responses of decreased surface TLR9 and enhanced TLR9 mRNA expression but not influence TLR9 protein level by using human plasmacytoid dendritic cell line CAL-1 cells, suggesting that SAT05f inhibits TLR9 activation by restraining TLR9 trafficking. Since the mitochondrial DNA released from injured tissue can cause systemic inflammatory response syndrome (SIRS), this study may provide valuable data for prevention and treatment of SIRS and rescue severe trauma patients.

journal_name

Curr Pharm Biotechnol

authors

Zhang X,Sun W,Wu X,Wang H,Yan Y,Guo S,Song D,Li H,Gao S,Wang L,Yu Y,Wang L

doi

10.2174/1389201015666141031114708

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

780-9

issue

9

eissn

1389-2010

issn

1873-4316

pii

CPB-EPUB-63173

journal_volume

15

pub_type

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