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Background  While microRNAs (miRNAs) are known to play a critical role in the progression of colorectal cancer, the role of miR-107 remains unknown. We evaluated its role and explored the underlying mechanism.    Materials & methods  MTT, wound-healing, transwell migration and transwell invasion assays were performed to evaluate the role of miR-107 in SW629 cell proliferation, migration and invasion. Real time-PCR and dual-luciferase reporter gene, TFR1 overexpression and western blotting assays were used to explore the underlying mechanism.    Results  MiR-107 is downregulated in colorectal cancer tissues and several human colorectal cancer cell lines. Low miR-107 expression often indicates a poor survival rate for colorectal cancer patients. MiR-107 suppresses the proliferation, migration and invasion of SW620 cells by negatively regulating transferrin receptor 1 (TFR1).    Conclusion  MiR-107 suppresses the metastasis of colorectal cancer and could be a potential therapy target in colorectal cancer patients.    Electronic supplementary material  The online version of this article (10.1186/s11658-019-0155-z) contains supplementary material, which is available to authorized users.

MiR-107 function as a tumor suppressor gene in colorectal cancer by targeting transferrin receptor 1