ncRNA basic information
ncRNA ID:
MI0000298
ncRNA Database:
miRBase
ncRNA Name:
miR-221
ncRNA Type:
miRNA
ncRNA Expression:
up-regulated
ncRNA Method:
qPCR
ncRNA Target Gene:
NA
ncRNA Pathway:
NA
Evidence (ncRNA-drug):
validated
drug basic information
Drug ID:
DB00675 (APRD00123)
Drug Name:
Tamoxifen
Drug Method:
Transmission electron microscopy analysis and nanoparticle tracking analysis were performed to determine the exosomes difference between MCF-7(TamR) (tamoxifen resistant) and MCF-7(wt) (tamoxifen sensitive) cells. PKH67 fluorescent labeling assay was used to detect exosomes derived from MCF-7(TamR) cells entering into MCF-7(wt) cells. The potential function of exosomes on tamoxifen resistance transmission was analyzed with cell viability, apoptosis,and colony formation. MiRNA microarrays and qPCR were used to detect and compare the miRNAs expression levels in the two cells and exosomes. As the targets of miR-221/222, p27 and ERalpha were analyzed with western blot and qPCR.
Drug Response:
resistant
Cancer basic information
Cancer:
breast cancer
Tissue/Cell:
cell line (MCF-7(TamR),MCF-7(wt))
Other information
Title:
Exosomal miR-221/222 enhances tamoxifen resistance in recipient ER-positive breast cancer cells.
Journal:
Breast Cancer Res Treat
Published:
2014
PubMed ID:
25007959