Bei Pei1,2, Tongyang Li3, Qi Qian1,2, Wenqiang Fan1,2, Xiao He1,2, Yulan Zhu1,2, Lingyun Xu1,2,3. 1. Changzhou No. 2 People's Hospital, Xinglong Lance, Changzhou, China. 2. Department of Breast Surgery, Changzhou No. 2 People's Hospital, Changzhou 213003, China. 3. Dalian Medical University, Dalian, China.
Abstract
BACKGROUND: Breast cancer metastasis is the main problem that affects the therapy and prognosis of breast cancer patients. Studies have indicated the role of microRNAs in breast cancer regulation, but the mechanisms are largely unknown. METHODS: In this study, we determined the expression of microRNA-30c-5p (miR-30c-5p) and coactosin-like protein 1 (COTL1) gene in breast cancer tissues, and revealed their effects on breast cancer metastasis regulation. Breast cancer and paracancerous tissues were collected. Reverse transcriptase polymerase chain reaction (RT-PCR) was used to analyze the expression of miR-30c-5p and COTL1, and breast cancer cell line (MCF-7) was employed to verify the relationship between miR-30c-5p and COTL1. Western blot analysis and immunofluorescence were used for proteins analysis and microfilament observation, respectively. A dual-luciferase reporter gene was used for microRNA-gene interaction assay. RESULTS: The results showed that the expression of miR-30c-5p decreased, while the expression of COTL1 increased in breast cancer tissues. The results of luciferase reporting gene assay showed that, COTL1 was the target of miR-30c-5p. After miR-30c-5p was upregulated, the expression of COTL1 was reduced, microfilament arrangement was in disorder, and cell migration ability was inhibited. After miR-30c-5p was downregulated, the expression of COTL1 was increased, and the cell migration ability was enhanced. COTL1 protein expression levels were significantly higher in cancer tissues with lymph node metastasis. CONCLUSIONS: These findings indicate that miR-30c-5p/COTL1 pathway regulates breast cancer metastasis and can be used as a potential therapy target. 2020 Gland Surgery. All rights reserved.
BACKGROUND: Breast cancer metastasis is the main problem that affects the therapy and prognosis of breast cancer patients. Studies have indicated the role of microRNAs in breast cancer regulation, but the mechanisms are largely unknown. METHODS: In this study, we determined the expression of microRNA-30c-5p (miR-30c-5p) and coactosin-like protein 1 (COTL1) gene in breast cancer tissues, and revealed their effects on breast cancer metastasis regulation. Breast cancer and paracancerous tissues were collected. Reverse transcriptase polymerase chain reaction (RT-PCR) was used to analyze the expression of miR-30c-5p and COTL1, and breast cancer cell line (MCF-7) was employed to verify the relationship between miR-30c-5p and COTL1. Western blot analysis and immunofluorescence were used for proteins analysis and microfilament observation, respectively. A dual-luciferase reporter gene was used for microRNA-gene interaction assay. RESULTS: The results showed that the expression of miR-30c-5p decreased, while the expression of COTL1 increased in breast cancer tissues. The results of luciferase reporting gene assay showed that, COTL1 was the target of miR-30c-5p. After miR-30c-5p was upregulated, the expression of COTL1 was reduced, microfilament arrangement was in disorder, and cell migration ability was inhibited. After miR-30c-5p was downregulated, the expression of COTL1 was increased, and the cell migration ability was enhanced. COTL1 protein expression levels were significantly higher in cancer tissues with lymph node metastasis. CONCLUSIONS: These findings indicate that miR-30c-5p/COTL1 pathway regulates breast cancer metastasis and can be used as a potential therapy target. 2020 Gland Surgery. All rights reserved.
Entities:
Keywords:
Breast cancer; cell migration ability; coactosin-like protein 1 (COTL1); microRNA-30c-5p (miR-30c-5p); microfilament
Authors: Martine Croset; Francesco Pantano; Casina W S Kan; Edith Bonnelye; Françoise Descotes; Catherine Alix-Panabières; Charles-Henri Lecellier; Richard Bachelier; Nathalie Allioli; Saw-See Hong; Kai Bartkowiak; Klaus Pantel; Philippe Clézardin Journal: Cancer Res Date: 2018-07-24 Impact factor: 12.701