Higher rates of esophageal cancer cases may be attributed to lifestyle factors such as: diet, obesity, alcohol and tobacco use.Moreover, the presence of oral <i>P. gingivalis</i> and <i>T. forsythia</i> has been found to be associated with an increased risk of esophageal cancer.Our review describes the role of <i>P. gingivalis</i> and <i>T. forsythia</i> in signaling pathways responsible for cancer development.It has been shown that <i>T. forsythia</i> may induce pro-inflammatory cytokines such as IL-1β and IL-6 by CD4 + T helper cells and TNF-α.Moreover, gingipain K produced by <i>P. gingivalis,</i> affects hosts immune system by degradation of immunoglobulins and complement system (C3 and C5 components).
In this study, we evaluated serum preoperative proinflammatory cytokine levels and investigated the correlation between preoperative interleukin-6 (IL-6) and IL-8 levels and survival of patients with esophageal cancer.
IL-6 loss suppressed tumorigenesis in physiologically relevant three-dimensional (3D) organotypic and 3D tumoroid models and murine models of esophageal cancer.
These results suggest that intracellular IL-6 expression in tumor cells may acts as a resistance factor against cisplatin-based treatments for esophageal cancer.