Genomics

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Identification of pro-metastatic pathways and molecules in mouse models with reduced expression or signaling of the insulin-like growth factor type 1 receptor


ABSTRACT: We performed single-cell RNA sequencing of multiple IGF-1R loss-of function mouse mammary tumor models to uncover how IGF-1R signaling regulates intrinsic epithelial cell signaling to suppress metastasis. We identify key pathways necessary for promoting metastasis, determined IGF-1R is required to maintain a metastatic suppressive tumor microenvironment and demonstrate that attenuated epithelial IGF-1R signaling in the MMTV-Wnt1 mouse tumor model is sufficient for metastatic invasion. We further show that adherence between luminal and basal tumor cells is necessary for tumor growth at the secondary site and that reduced IGF-1R signaling in tumor epithelial cells inhibits secondary tumor epithelial cell growth due to dysregulated E-cadherin and P-cadherin and loss of cell-cell adhesion.

ORGANISM(S): Mus musculus

PROVIDER: GSE182236 | GEO | 2022/11/21

REPOSITORIES: GEO

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