Abstract: The present invention pertains to a method for identifying a subject suffering from cancer as a responder or non-responder to fibroblast growth factor receptor 1 (FGFR1) inhibitor therapy. The method involves the determination of the presence or absence of a genetic alteration of the FGFR1 gene, wherein the genetic variation is a copy number variation caused by a Breakage-Fusion-Bridge-like (BFB-like) mechanism wherein the break is located within, or within close proximity of, the ORF of the FGFR1 gene. These breaks associate with FGFR inhibitor sensitivity, and intra-chromosomal tail-to-tail breaks in FGFR1 may work as a predictive therapeutic marker for an FGFR inhibitor therapy in cancer that can be used to stratify patients for FGFR-inhibitor therapy. Furthermore, provided are inhibitors of FGFR1 for use in the treatment of cancer, and a method for identifying a genetic biomarker associated with a disorder, such as cancer.

Abstract: The present invention relates to a method for predicting the responsiveness of cancer cells to FGFR1 inhibitors, which comprises the evaluation of the status of FGFR1 gene and the status of MYC. A kit useful for carrying out the method is also provided. In addition, a method of treating cancer such as lung cancer is also provided which includes determining the status of FGFR1 gene and the status of MYC gene, and administering to the cancer patient an FGFR1 inhibitor if the tumor tissue or cells exhibit an increased expression or amplification of the FGFR1 gene, as well as an increased expression or amplification of the MYC gene.

Abstract: The present invention relates to a method for predicting the responsiveness of cancer cells to FGFR1 inhibitors, which comprises the evaluation of the status of FGFR1 gene and the status of MYC. A kit useful for carrying out the method is also provided. In addition, a method of treating cancer such as lung cancer is also provided which includes determining the status of FGFR1 gene and the status of MYC gene, and administering to the cancer patient an FGFR1 inhibitor if the tumor tissue or cells exhibit an increased expression or amplification of the FGFR1 gene, as well as an increased expression or amplification of the MYC gene.