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TranscriptomicsExpression of miR-200c in claudin-low breast cancer alters stem cell functionality, enhances chemosensitivity and reduces metastatic potential
Claudin-low tumors are a highly aggressive breast cancer subtype with no targeted treatments and a clinically documented resistance to chemotherapy. They are significantly enriched in cancer stem cells (CSCs), which makes claudin-low tumor models particularly attractive for studying CSC behavior and...
ORGANISM(S): Mus musculus 
2015-06-22 | E-GEOD-62230 | biostudies-arrayexpress
TranscriptomicsConditional loss of ErbB3 delays mammary gland hyperplasias induced by mutant PIK3CA but does not affect mammary tumor latency, gene expression or signaling
Mutations in PIK3CA, the gene encoding the p110α subunit of PI3K, induce transformation of mammary epithelial cells (MEC). Studies suggest the transforming action of mutant PIK3CA requires binding to activated receptor tyrosine kinases or adaptors. We examined in transgenic mice if ErbB3, a powerful...
ORGANISM(S): Mus musculus 
2013-06-20 | E-GEOD-43037 | biostudies-arrayexpress
TranscriptomicsLKB1/STK11 Inactivation Leads to Expansion of Pro-Metastatic Tumor Sub-Population in Melanoma
Germline mutations in LKB1 (STK11) are associated with the Peutz–Jeghers syndrome (PJS), which includes aberrant mucocutaneous pigmentation, and somatic LKB1 mutations occur in 10% of cutaneous melanoma. By somatically inactivating Lkb1 with K-Ras activation (+/- p53 loss) in murine melanocytes, we ...
ORGANISM(S): Mus musculus 
2012-06-24 | E-GEOD-34866 | biostudies-arrayexpress
TranscriptomicsMutant PI3K cooperates with HER2 to promote mammary tumor formation and induces trastuzumab resistance in vivo
HER2 (ERBB2) gene amplification and PIK3CA mutations often co-occur in breast cancer, and aberrant activation of the PI3K pathway has been implicated in resistance to HER2-directed therapies. We have created a mouse model of HER2-overexpressing (HER2+), PIK3CAH1047R-mutant breast cancer. Mice expres...
ORGANISM(S): Mus musculus 
2013-09-03 | E-GEOD-41118 | biostudies-arrayexpress
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