Recent studies show that most patients with X-linked hyper IgM syndrome have defects in the gene for CD40 ligand. We evaluated 17 unrelated males suspected of having X-linked hyper IgM syndrome. Activated T cells from 13 of the 17 patients failed to bind a soluble CD40 construct. In these patients, the sequence of CD40 ligand demonstrated mutations. By contrast, T cells from the remaining four ...

BACKGROUND CD40 ligand is expressed on platelets and released from them on activation. We investigated the predictive value of soluble CD40 ligand as a marker for clinical outcome and the therapeutic effect of glycoprotein IIb/IIIa receptor inhibition in patients with acute coronary syndromes. METHODS Serum levels of soluble CD40 ligand were measured in 1088 patients with acute coronary syndr...

negative control antibody. The CD40 ligand antibody completely abrogated the induction of PGE2. At 1/200 dilution, platelet concentrate supernatants still induced PGE2 production. High concentrations of bioactive CD40 ligand in platelet transfusions, perhaps in concert with other mediators, might explain the persistence of transfusion reactions even when white blood cells are removed before pla...

blocking antibodies are valuable tools for inhibiting the specific receptor- ligand interactions. the interaction of co-stimulatory molecules on the antigen presenting cells with their ligands on t cells is an essential step for t cell activation. in the present study, the effect of blocking antibody against cd40 on its t cell stimulatory potential is investigated. the dcs (dendritic cells) wer...

CD40 is a member of the tumor necrosis factor (TNF) receptor family of cell surface proteins and was originally described as a B cell restricted antigen. Treatment of primary human monocytes with granulocyte/macrophage colony-stimulating factor (GM-CSF), interleukin 3 (IL-3), or interferon gamma (IFN-gamma) resulted in the induction of CD40 mRNA and enhancement of cell surface protein expressio...

The CD40 ligand/CD40 pathway is widely recognized for its prominent role in immune regulation and homeostasis. CD40, a member of the tumor necrosis factor receptor family, is expressed by antigen-presenting cells, as well as non-immune cells and tumors. The engagement of the CD40 and CD40 ligands, which are transiently expressed on T cells and other non-immune cells under inflammatory condition...