Primary tumor MOGAT2 protein level negatively correlates with poorer mammary tumor patient survival. (a) Eight tissue arrays consisting of 147 triple-negative breast cancer samples were constructed and immunohistochemically stained with a MOGAT2 antibody, followed by an assessment including the percentage of positively stained tumor cells and the intensity of staining on a 13-point scale. (b) Survival analyses showed that in the group with an elevated MOGAT2 protein level in the tumor, breast cancer patients had a poorer overall survival (OS) probability. (c) The analyses of TCGA data showed MOGAT2 mRNA level was reduced along with the triple-negative breast adenocarcinoma progressed from early clinical stages to late stages. (d) Survival analyses of TCGA data showed that in the group with an elevated MOGAT2 RNA level in the tumor, TNBC patients had a poorer OS (optimized cut-off values) and DFS (median value as cut-off value).