Abstract
The modulatory effect of miR-21 on the proliferation of melanoma cells through stimulation of PTEN (Phosphatase and tensin homologue deleted on chromosome 10) expression was investigated in the current study. PTEN, as a tumor suppressor, is expressed in low levels in melanoma tissues and cell lines. Nevertheless, miR-21 can stimulate cancer development and suppress cell apoptosis. Overexpression of PTEN substantially impaired the proliferation of miR-21-treated melanoma cells. In addition, miR-21 and PTEN were observed to exhibit a combinatorial effect, whereas miR-21 could negatively regulate the expression of PTEN. In conclusion, these findings demonstrate that miR-21 affects melanoma development by targeting PTEN, establishing a new strategy for treating malignant melanoma. Furthermore, in this study, microparticles and nanoparticles were employed as carriers to construct, through the self-assembly method, nanocapsules carrying miR-21 in order to develop an efficient nanocapsule delivery system of miR-21 against melanoma cells.
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