In the negative ion mode, central carbon metabolism in cancer, protein digestion and absorption, pyrimidine metabolism, choline metabolism in cancer, pantothenate and CoA biosynthesis, prolactin signaling pathways, bile secretion, and various amino acid metabolic pathways (including tyrosine metabolism, ABC transporters, arginine biosynthesis, hydrogen acid, silk hydrogen acid, and Sue hydrogen acid metabolism) are closely related to HSV1 infection. Here, PRL is linked to cancer.