Project description:We previously showed that overexpression of the miR-200c/141 cluster in the TNBC cell line MDA-MB-231 significantly reduced proliferation and invasion in vitro and tumor growth and metastasis in vivo. To confirm the effects of miR-200s in another TNBC cell line, MDA-MB-436 cells were created to overexpress both the miR-200c/141 cluster and the miR-200b/200a/429 cluster.
Project description:We have previously shown that transgenic overexpression of the miR-200b/200a/429 cluster prevents mammary tumor development in MTB-IGFIR mice. In this study we evaluated whether the miR-200b/200a/429 cluster could also prevent mammary tumor development from a different oncogene, namely Neu/Erbb2. We found that transgenic overexpression of Neu/Erbb2 in MTB-TAN mice induce rapid mammary tumor development and co-overexpression of the miR-200b/200a/429 cluster with Neu/Erbb2 completely prevent mammary epithelial transformation and tumor development
Project description:The miR-200 family of microRNAs consisting of miR-141, miR-200a, miR-200b, miR-200c and miR-429 are key regulators of breast cancer progression. The miR200 family maintains mammary epithelial identity and downregulation of miR-200 expression drives the epithelial-to-mesenchymal transition. Re-expression of one or more miR-200 family members in tumor cells with mesenchymal characteristics may restore the epithelial phenotype and alter growth and metastatic potential. To test this, the miR-200b/200a/429 cluster was re-expressed in a murine claudin-low mammary tumor cell line, RJ423
Project description:miRNAs are an class of small noncoding RNAs and about 21-25 nucleotides in length. miRNAs inhibit the translation or induce mRNA degradation by binding to the 3’ UTR of target mRNAs and have been identified as the tumor promoters or suppressors regulating the progression of cancers. miR-429, which is a member of an evolutionarily conserved family of miRNAs that includes miR-200b, miR-200a, miR-200c and miR-141, is expressed in various epithelial tissues. Our goal is to search the possible target genes of miR-429 in human liver cancer cell line HCCLM3. We analyzed possible target genes of miR-429 by identifying the shared genes among the down-regulated genes in epithelial cell adhesion molecule (EpCAM) negative HCCLM3 cells which treated with miR-429 mimics and the up-regulated genes in EpCAM positive HCCLM3 cells which treated with Antagomir-429.
Project description:RNA was isolated from mammary glands from 55 day old control mice, mice overexpressing the miR-200b/200a/429 cluster in mammary epithelial cells (MTB-200ba429) mice overexpressing the IGF-IR transgene in mammary epithelial cells (MTB-IGFIR), and mice overexpressing both the miR-200b/200a/429 cluster and the IGF-IR transgene in mammary epithelial cells (MTB-IGFIRba429)
Project description:miRNA sequencing of RJ423 cells expressing an empty vector (RJ423EV) or a vector containing the miR-200b/200a/429 cluster (RJ423ba429)
Project description:RNA sequencing of MDA-MB-231 cells expressing an empty vector (MDA-231EV), a vector containing the miR-200c/141 cluster (MDA-231c141) or a vector containing the miR-200b/200a/429 cluster