Expression of Glut-1 and HK-II in Pancreatic Cancer and Their Impact on Prognosis and FDG Accumulation1

OBJECTIVE The purpose of this article is to analyze the expression of Glut-1 and HK-II, the association between their expression and 18F-FDG accumulation in pancreatic cancer. METHODS Fifty patients with histologically proven pancreatic cancer were included in this preliminary study, all of whom received 18F-FDG PET/CT performance before surgery. Immunohistochemical staining of tumor tissue and adjacent normal tissue was performed for Glut-1 and HK-II. By combining proportions and intensity of immunochemical staining, we obtained the modified immunohistological scores for Glut-1 and HK-II respectively. The relationship between expression of Glut-1, HK-II and series of parameters was analyzed, i.e. clinicopathological characteristics, prognosis of patients and SUVmax of PET-CT. RESULTS Compared with normal tissue, the Glut-1 and HK-II expression in pancreatic cancer tissue was significantly increased (P<.001). There was no correlation between expression of Glut-1, HK-II and age, gender, tumor size, tumor location, tumor histological type, tumor differentiation, the nerve infiltration, vascular invasion, local infiltration, lymph node metastasis or tumor staging in pancreatic cancer (P>.05). During the follow-up period, the survival curves of low Glut-1 group and high Glut-1 group were statistically different (P=.049). Multivariate analysis (Cox regression) revealed that Glut-1 expression was not associated with mortality (P>.05). No statistical difference was found in the survival curves of negative HK-II group and positive HK-II group (P=.545). There was no correlation between 18F-FDG uptake and expression of Glut-1 and HK-II(P>.05). CONCLUSION The Glut-1 and HK-II expression in pancreatic cancer tissue was significantly increased. There was no correlation between expression of Glut-1, HK-II and clinicopathological characteristics, prognosis and 18F-FDG uptake.