title: miR-300 promotes proliferation and EMT-mediated colorectal cancer migration and invasion by targeting p53.
abstract: p53 mutations in tumors can induce the loss of wild-type tumor-suppressing p53 function, which results in the increase in proliferation, migration and invasion ability in cancer cells. Studies have shown that the expression of p53 is regulated by several microRNAs (miRNAs). In the present study, we found that miR-300 and p53 were significantly increased in colorectal cancer (CRC) tissues when compared with levels noted in adjacent colorectal tissues. Both miR-300 and p53 were significantly correlated with lymphatic metastasis and TNM stage. Both miR-300 and p53 promoted CRC cell (SW480 and HT29) proliferation, migration, and invasion, respectively, in vitro. In addition, we found that miR-300 is a direct positive regulator of p53 through binding to the binding site in the 3'UTR of the p53 gene in human CRC cells. Moreover, both miR-300 and p53 induced CRC cell epithelial‑mesenchymal transition (EMT) respectively. Taken together, we demonstrated that miR-300 promoted proliferation and EMT-mediated CRC migration and invasion by targeting p53. These findings provide a new theoretical basis and potential therapeutic targets, and thus lays the foundation for exploring the pathogenesis of CRC.
authors: Department of General Surgery and Center of Minimal Invasive Gastrointestinal Surgery, Southwest Hospital, The Third Military Medical University, Shapingba, Chongqing 400038, P.R. China.
authors: Lin
authors: L
authors: Wang
authors: Department of General Surgery and Center of Minimal Invasive Gastrointestinal Surgery, Southwest Hospital, The Third Military Medical University, Shapingba, Chongqing 400038, P.R. China.
authors: Peiwu
authors: P
authors: Yu
mesh_terms: D020413:3' Untranslated Regions; D001483:Base Sequence; D001665:Binding Sites; D045744:Cell Line, Tumor; D002465:Cell Movement; D049109:Cell Proliferation; D015179:Colorectal Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D058750:Epithelial-Mesenchymal Transition; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D057809:HEK293 Cells; D006801:Humans; D008297:Male; D035683:MicroRNAs / Q000502:physiology*; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D034622:RNA Interference; D016159:Tumor Suppressor Protein p53 / Q000235:genetics* / Q000378:metabolism
chemical_list: D020413:3' Untranslated Regions; C000596512:MIRN300 microRNA, human; D035683:MicroRNAs; C495901:TP53 protein, human; D016159:Tumor Suppressor Protein p53