TLR2 is reported to enhance the expression of costimulatory molecules on the antigenpresentingcell, however the regulatory mechanisms are still unclear.
They are found in a perivascular network and may serve as the antigenpresentingcell which initiates immune responses to antigens delivered through the circulation.
它们位于血管网周围,可以起到抗原递呈细胞的作用。抗原递呈细胞启动针对抗原的免疫反应并释放入血。
3
T cell can only recognize specific antigenic peptide-MHC complex on antigen-presentingcell. This is MHC restriction in antigen recognition of t cell.