objectives the aim of this study was to investigate the possible associations between co-stimulatory molecule gene polymorphisms and viral infections in kidney transplant patients. results cmv active infection was found in 31 of 172 (18.02%) kidney transplant patients. hcv infection was only found in two of the 172 (1.16%) studied patients. significant associations were found between tt and tc ...

In this study, we investigated whether CD4 and CD8 autoreactive T cells have different costimulatory requirements for their activation in vitro by testing the effect of a panel of Abs specific for various costimulatory molecules. Our results showed that CD8 interphotoreceptor retinoid-binding protein-specific T cells are more dependent on costimulatory molecules for activation than their CD4 co...

The full activation of T cells necessitates the concomitant activation of two signals, the engagement of T-cell receptor by peptide/major histocompatibility complex II and an additional signal delivered by costimulatory molecules. The best characterized costimulatory molecules belong to B7/CD28 and TNF/TNFR families and play crucial roles in the modulation of immune response and improvement of ...