CD40LG and esophageal cancer: In our previous studies we found that the cytotoxicity of oxLDL on vascular endothelial cells line was lower than that on esophageal cancer cell and leukemia cell lines, as well as in patients with squamous cell esophageal carcinoma with a higher level of the oxLDL-IgM antibody titer and lower level of the oxLDL-IgG antibody titer, comparing with the normal persons [15, 18, 20].