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[16] Primer sequences are available are summarized in the Supporting Information Table S4. http://www.selleckchem.com/products/Maraviroc.html For the mutational screening, tumor DNA was amplified by PCR and sequenced, following previously described protocols.[15] Those exons containing known mutational hotspots or encoding the tyrosine kinase domain of the protein were analyzed: MET (exons 2 and 15�C19), KIT (exons 9, 11�C13 and 17), PDGFRA (exons 12, 14 and 18), FGFR1 (exons 9�C18), FGFR2 (exons 6�C8, 10, 11 and 14), FGFR3 (exons 6, 7, 10, 15 and 16) and IGF1R (exons 16�C21). Primer sequences are available upon request. Categorical variables were described using frequency distributions, and continuous variables were summarized as medians and ranges. Associations between categorical variables were assessed with the ��2 test (or Fisher's exact test for pairs of dichotomous variables). For the comparison of the relative levels of gene expression http://www.selleck.cn/products/Paclitaxel(Taxol).html of FGFR1 and PDGFRA with different gene copy number groups we used the Mann-Whitney U test. Both test were performed with the SPSS statistics software. A nonparametric statistical hypothesis test was used because expression levels do not follow a Gaussian distribution. The median level of gene expression for each group was calculated. First, we determined the copy number of the FGFR1, FGFR2, FGFR3, IGF1R, KIT, MET and PDGFRA genes using FISH analysis. Tumors were assigned to one of four categories on the basis of their gene copy number: (i) normal copy (NC), for 12 copies of the gene per cell. It is important to mention that while MI and HI always depicted individual and countable spots ( http://www.selleckchem.com/products/pirfenidone.html was significantly more frequent in SCCs while MET amplification was found in one AC from a smoker and in one large cell carcinoma. PDGFRA and KIT are located only about 0.35-kb apart on chromosome 4q and, in our tumor set, a GA event always affected both genes and occurred in SCCs and ACs. MI was the only copy number alteration observed for IGF1R, FGFR2 and FGFR3. In the case of IGF1R, MI significantly predominated in SCC. We also determined the ALK translocations and ERBB2 amplification on the basis of protein immunostaining and verification by FISH, because these are known to produce an increase in their respective protein levels.