is there a canonical gene expression signature for a 'mesenchymal' breast tumor type versus a 'basal' breast tumor type? unsupervised gene expression clustering in primary breast tumors using PAM50 gene set often reveals five tumor subtypes (basal, her2, luminal a, luminal b and normal-like) but it's not clear how similar or dissimilar basal tumors would be to mesenchymal tumors (i.e. tumors with high vimentin/fibronectin1/snail/twist and low epithelial markers like ecadherin). Is there a canonical gene list for both types and perhaps associated paper that tries to use gene expression to answer what the differences between the two types are?
I could only find (http://www.ncbi.nlm.nih.gov/pubmed/20021961) which does not use genome wide expression analysis and is not conclusive