these results , together with previous evidence of the presence of ia antigens and an antigen-presenting ability of vascular endothelial cells , suggest that the attachment of lymphocytes to the vascular endothelial cells in the early course of gvhd may represent an in situ morphologic representation of antigen presentation by endothelial cells to helper t cells .
C0003315
antigen-presenting
C0206431
antigen presentation