Authors: Rupeng Zhang Hui Liu Fangxuan Li Hui Li Jinpu Yu Xiubao Ren
Publish Date: 2013/08/25
Volume: 58, Issue: 12, Pages: 3494-3502
Abstract
Immunohistochemical staining for IDO expression in gastric cancer tissues n = 50 was carried out Tumorinfiltrating memory Tm cells were counted by flow cytometry The association between IDO expression and the subsets of tumor infiltrating Tm are discussedThe higher IDO expressions were significantly associated with deeper invasion P = 0016 and higher frequencies P = 0038 of lymph node metastasis The lower tumorinfiltrating CD4+Tm were significantly associated with the advanced clinical stage P = 0026 and lymph node metastasis P = 0016 The lower percentages of CD8+Tm were significantly related to undifferentiated histological type P = 0042 and lymph node metastasis P = 0037 However the lower percentage of CD8+Tem was significantly correlated to differentiated histological type P = 0017 lower frequencies of lymph node metastasis P = 0014 and earlier clinical stage P = 0008 The higher IDO expression patients had significantly lower percentages of CD4+Tm P = 0012 and CD8+Tm P = 0033 Nevertheless it was confirmed that the higher level of IDO expression correlated with higher percentages of CD8+Tm cells in univariate and multivariate analysis P = 0011IDO overexpression and Tm in tumor microenvironments were correlated with the disease stage and histological type of gastric cancer Higher IDO expression was related to the lower percentage of CD4+Tm and CD8+Tm whereas the higher level of IDO expression related with a higher percentage of CD8+Tem
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