Project description:A Kinase Anchoring Proteins (AKAPs) that coordinate spatiotemporal signaling are increasingly implicated in cancer. Elevated AKAP2 protein correlates with an invasive phenotype in triple-negative breast cancer cell lines. A combination of biochemical, cellular, and omics approaches show that AKAP2 cytoskeleton and focal adhesion associated scaffolds contribute to the progression of basal-like triple-negative breast cancer. Proximity proteomics identifies AKAP2 as an element of focal adhesions in MDA-MB-231 cells. Molecular and immunofluorescent microscopy studies demonstrate that AKAP2 indirectly constrains focal adhesion kinase (FAK). Gene silencing of AKAP2 not only decreases FAK levels but also attenuates the phosphorylation of the cell motility adapter protein paxillin on Tyr118. Cell-derived xenograft studies in mice establish that AKAP2 is required for triple-negative breast cancer growth and metastasis, phenotypes that are linked to FAK action. These findings discover a new role for focal adhesion-associated AKAP2 in triple-negative breast cancer pathology.
2025-11-25 | GSE311243 | GEO
Project description:Genomic characteristics of triple negative apocrine carcinoma: a comparison to triple negative breast cancer
Project description:To define the molecular regulators of metastasis of triple-negative breast cancer, we conducted a rigorous characterization of four populations of MDA-MB-231 human triple-negative breast cancer cells that display a range of intrinsic spontaneous metastatic capacities in immuno-deficient mice, from non-metastatic to highly metastatic to lung, liver, spleen and spine. PAT-Seq gene expression profiling of primary tumor cells identified the fibroblast growth factor homologous factor, FGF13, as a candidate metastatic virulence gene highly upregulated in aggressively metastatic MDA-MB-231HM tumors.
Project description:Identification of genes up-regulated in ALK-positive and EGFR/KRAS/ALK-negative lung adenocarcinomas. To elucidate molecular characteristics of lung adenocarcinomas (ADCs) with ALK mutations and those without EGFR, KRAS and ALK mutations, 226 primary lung ADCs of pathological stage I-II, examined for the status of EGFR, KRAS and ALK mutations, were subjected to genome-wide expression profiling, and genes up-regulated in lung ADCs with ALK mutations and those without EGFR, KRAS and ALK mutations were identified. One hundred and seventy-four genes, including ALK, were selected as being up-regulated specifically in 79 lung ADCs without EGFR and KRAS mutations. These 79 cases were divided into: 11 cases of ALK-positive ADCs, 36 cases of group A triple-negative ADCs, and 32 cases of group B triple-negative ADCs, by unsupervised clustering according to the expression of the 174 genes. In ALK-positive ADCs, 30 genes, including ALK itself and GRIN2A, were significantly overexpressed. Group A triple-negative ADC cases showed significantly worse prognoses for relapse and death than ADC cases with EGFR, KRAS or ALK mutations and group B triple-negative ADC cases. Nine genes were identified as being significantly up-regulated in group A triple-negative ADC cases and critical for predicting their prognosis. The nine genes included DEPDC1, which had been identified as a candidate diagnostic and therapeutic target in bladder and breast cancers. Genes discriminating this group of ADCs will be useful for selection of patients who will benefit from adjuvant chemotherapy after surgical resection of stage I-II triple-negative ADCs and also informative for the development of molecular targeting therapies for these patients. Expression profiles in of 226 lung adenocarcinomas (127 with EGFR mutation, 20 with KRAS mutation, 11 with EML4-ALK fusion and 68 triple negative cases).