Two genes with down-regulated expressions are closely related to the T cell mediated immunity according to GO analysis (with high value of Enrichment). These results reveal that T cell mediated immunity has been declined markedly in PE patients. The declined T cell receptor complex displayed as significanlly diminished mRNA expression of CD3G, CD3D, CD247, ZAP-70, T cell granzyme A and B, which will result in loss of functions of cytotoxic T cells.