An oligonucleotide blocks interferon-gamma signal transduction.
Transplantation
; 62(9): 1297-301, 1996 Nov 15.
Article
in En
| MEDLINE
| ID: mdl-8932275
ABSTRACT
Interferon (IFN)-gamma is an important mediator of transplant graft rejection. It induces endothelial cell expression of HLA-DR and intercellular adhesion molecule-1, which render transplant grafts more susceptible to rejection by the host. Oligonucleotide 5'-GGG GTT GGT TGT GTT GGG TGT TGT GT-RNH2 (oligo I) blocks multiple IFN-gamma effects in human K562 cell cultures. A systematic approach revealed that oligo I has a novel, and potentially important, mode of action--it blocks the binding of IFN-gamma to its receptor, thus preventing activation of the IFN-gamma signal transduction pathway. The results are consistent with an aptamer mechanism of action, because oligo I exerts its inhibitory effects by interacting with protein, not intracellular nucleic acid targets, such as mRNA or genomic DNA.
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Database:
MEDLINE
Main subject:
Oligonucleotides
/
Signal Transduction
/
Interferon-gamma
/
Receptors, Interferon
Limits:
Humans
Language:
En
Year:
1996
Type:
Article