Patent ID: 7537891

Claim:
A method of identifying breast cancer cells that are either resistant or sensitive to inhibition of cellular proliferation by a protein tyrosine kinase inhibitor comprising the steps of: (a) determining the expression profile of a plurality of informative genes from said breast cancer cells by measuring the gene expression products of said plurality of informative genes; (b) normalizing the values of the expression profile of said plurality of informative genes to an internal control gene that is GADPH or an other housekeeping gene; (c) comparing the normalized values of said expression profile of said plurality of informative genes to the average normalized expression value of said plurality of informative genes in a panel of control breast cancer cells, wherein said panel of control breast cancer cells consist of a plurality of breast cancer cells that are sensitive and a plurality of breast cancer cells that are resistant to said protein tyrosine kinase inhibitor; and (d) predicting whether said breast cancer cells are resistant or sensitive to inhibition of cellular proliferation by the protein tyrosine kinase inhibitor, wherein said plurality of informative genes consists of: EphA2; caveolin 1; caveolin 2; annexin A2; polymerase I and transcript release factor; and insulin-like growth factor binding protein 2, wherein said protein tyrosine kinase inhibitor is an inhibitor of Src, Fgr, Fyn, Yes, Blk, Hck Lck, Lyn, BCR-ABL, PDGFR, c-Kit, and EphA2, and wherein an expression level of one or more of said gene expression products from EphA2; caveolin 1; caveolin 2; annexin A2; or polymerase I and transcript release factor in said breast cancer cells that is higher, relative to the average expression level of said gene expression product in said panel of control breast cancer cells, or wherein an expression level of insulin-like growth factor binding protein 2 in said breast cancer cells that is lower, relative to the average expression level of said gene expression product in said panel of control breast cancer cells, is indicative of sensitivity to the protein tyrosine kinase inhibitor, while an expression level of one or more of said gene expression products from EphA2; caveolin 1; caveolin 2; annexin A2; or polymerase I and transcript release factor in said breast cancer cancer that is lower, relative to the average expression level of said gene expression product in said panel of control breast cancer cells, or wherein an expression level of insulin-like growth factor binding protein 2 in said breast cancer cells that is higher, relative to the average expression level of said gene expression product in said panel of control breast cancer cells, is indicative of resistance to the protein tyrosine kinase inhibitor.