MiR-449b-5p modifies glycolysis by lactate dehydrogenase A in gastric cancer

摘要

Purpose: To investigate the role of miR-449b-5p in gastric cancer (GC) metabolism. Methods: Human GC samples and their corresponding normal tissues were used in this study. Cell survival ability was evaluated using a commercial MTT kit. Glucose uptake, lactate production and ATP content were assessed using commercial kits. The ex pression levels of miRNAs were assessed by stem-loop reverse transcription-polymerase chain reaction (RT-PCR). Results: MiR-449b-5p ex pression decreased in both GC tissues and cells. When the cells with low level of miR-449b-5p were transfected with miR-449b-5p mimics, glycolysis was inhibited (p 0.05). Lactate dehydrogenase A (LDHA) was predicted as a target gene of miR-449b-5p and verified using luciferase reporter assay. MiR-449b-5p ex pression was up-regulated in GC cells (p 0.05). Furthermore, miR-449b-5p ex pression was related to long overall survival time in patients with GC. Conclusion: The findings demonstrate that miR-449b-5p reverses the glycolytic state of GC cells by targeting LDHA ex pression, and thus, it can potentially be developed for the treatment of gastric cancer.