Malignant epithelia and tumor-associated stroma of PABC and Non-PABC were isolated by laser capture microdissection and gene expression profiled. Additionally, normal breast epithelia and stroma adjacent to the two tumor types were profiled.
Genomic signatures of pregnancy-associated breast cancer epithelia and stroma and their regulation by estrogens and progesterone.
Specimen part, Subject
View SamplesThe floxed insulin receptor was specifically targetted for deletion in the mammary gland using a mouse strain bearing Cre recombinase under the BLG promoter.
The insulin receptor plays an important role in secretory differentiation in the mammary gland.
Specimen part
View SamplesCancer incidence increases in the elderly, although the underlying reasons for this association are unknown. We show that B-progenitors in old mice exhibit profound signaling and metabolic defects, and that expression of BCR-ABL, NRASV12 and MYC reverses these fitness defects, leading to selection of oncogenically-initiated cells and leukemogenesis in old hematopoietic backgrounds. Aging is associated with increased inflammation in the BM microenvironment, and inducing inflammation in young mice phenocopies aging B-lymphopoiesis. Importantly, reducing inflammation in aged mice preserves the function of B-progenitors and prevents NRasV12-mediated oncogenesis. We conclude that chronic microenvironments in old age lead to reductions in the fitness of hematopoietic stem and progenitor cell populations. This reduced progenitor pool fitness leads to selection for cells harboring oncogenic mutations in part due to their ability to correct aging-associated functional defects.
Aging-associated inflammation promotes selection for adaptive oncogenic events in B cell progenitors.
Age, Specimen part
View SamplesA subset of our SLNs would be upregulated by Nutlin-3 and down-regulated by 5-FU and that this differential regulation could potentially explain how cell fate choice is determined
ATM and MET kinases are synthetic lethal with nongenotoxic activation of p53.
Cell line, Treatment
View Samples