Linked Life Data

11981808

Source:http://linkedlifedata.com/resource/pubmed/id/11981808

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2002-5-23
pubmed:abstractText
Reaction to certain motifs in bacterial DNA is an important function of natural immunity. For example, single stranded oligonucleotides (ODN) containing the motif "not C, unmethylated C, G, not G" are powerful mitogens and apoptosis inhibitors for mouse spleen B cells. But replacing GCGTT or ACGTT with GCGGG or ACGGG converted a stimulatory 15-mer ODN into an inhibitory ODN. All inhibitory ODN had three consecutive G, and a fourth G increased inhibitory activity, but a deazaguanosine substitution to prevent planar stacking did not affect activity. Inhibitory ODN blocked apoptosis protection and cell-cycle entry induced by stimulatory ODN, but not that induced by lipopolysaccharide, anti-CD40 or anti-IgM+IL-4. ODN-driven up-regulation of cyclin D(2), c-Myc, c-Fos, c-Jun and Bcl(XL) and down-regulation of cyclin kinase inhibitor p27(kip1) were all blocked by inhibitory ODN. The relative potency of a series of stimulatory and inhibitory ODN was the same for all readouts measured. Interference with uptake of stimulatory ODN could not account for their inhibitory effects. Even if addition of inhibitory ODN was delayed several hours, partial inhibition of stimulatory ODN effects occurred. Inhibitory ODN hold potential as antidotes for excessive ODN stimulation in the clinical setting and provide an important tool for studying ODN recognition.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0014-2980
pubmed:author
pubmed:issnType
Print
pubmed:volume
32
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1212-22
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Inhibitory oligonucleotides specifically block effects of stimulatory CpG oligonucleotides in B cells.
pubmed:affiliation
Department of Medicine, Iowa City Veterans Administration Medical Center, Iowa City, USA.
pubmed:publicationType
Journal Article, In Vitro, Research Support, U.S. Gov't, Non-P.H.S.