期刊
NEOPLASIA
卷 23, 期 8, 页码 823-834出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.neo.2021.05.015
关键词
Melanoma; miR-138-5p; Trp53; Metastasis; Aggressiveness
类别
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo [2010/18484-6, 2012/08776-5, 2014/13663-0, 2018/20775-0]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior [2867/10]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico [473139/2009-0]
The deregulation of miRNAs plays a role in the development of various types of cancer, including melanoma. In a study on mice melanoma cells, overexpression of miR-138-5p was found to induce an aggressive phenotype, leading to increased proliferation, migration, and stress resistance. Furthermore, the overexpression of miR-138-5p was linked to the direct suppression of the tumor suppressor Trp53, contributing to melanoma metastasis.
Deregulation of miRNAs contributes to the development of distinct cancer types, including melanoma, an aggressive form of skin cancer characterized by high metastatic potential and poor prognosis. The expression of a set of 580 miRNAs was investigated in a model of murine melanoma progression, comprising non-metastatic (4C11-) and metastatic melanoma (4C11+) cells. A significant increase in miR-138-5p expression was found in the metastatic 4C11+ melanoma cells compared to 4C11-, which prompted us to investigate its role in melanoma aggressiveness. Functional assays, including anoikis resistance, colony formation, collective migration, serum-deprived growth capacity, as well as in vivo tumor growth and experimental metastasis were performed in 4C11- cells stably overexpressing miR-138-5p. miR-138-5p induced an aggressive phenotype in mouse melanoma cell lines leading to increased proliferation, migration and cell viability under stress conditions. Moreover, by overexpressing miR-138-5p, low-growing and non-metastatic 4C11- cells became highly proliferative and metastatic in vivo, similar to the metastatic 4C11+ cells. Luciferase reporter analysis identified the tumor suppressor Trp53 as a direct target of miR-138-5p. Using data sets from independent melanoma cohorts, miR-138-5p and P53 expression were also found deregulated in human melanoma samples, with their levels negatively and positively correlated with prognosis, respectively. Our data shows that the overexpression of miR-138-5p contributes to melanoma metastasis through the direct suppression of Trp53.
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