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Tumor samples were collected from both the primary and metastatic sites of nonsmall cell lung cancer, breast cancer and melanoma from patients in locations worldwide, and these were submitted to Caris Life Sciences for tumor multiplatform analysis, including gene sequencing (Sanger and next\u2010generation sequencing with a targeted 47\u2010gene panel), protein expression (assayed by immunohistochemistry) and gene amplification (assayed by in situ hybridization). The data analysis considered differential protein expression, gene amplification and mutations among brain metastases, extracranial metastases and primary tumors. The analyzed population included: 16,999 unmatched primary tumor and\/or metastasis samples: 8,178 nonsmall cell lung cancers (5,098 primaries; 2,787 systemic metastases; 293 brain metastases), 7,064 breast cancers (3,496 primaries; 3,469 systemic metastases; 99 brain metastases) and 1,757 melanomas (660 primaries; 996 systemic metastases; 101 brain metastases). TOP2A expression was increased in brain metastases from all 3 cancers, and brain metastases overexpressed multiple proteins clustering around functions critical to DNA synthesis and repair and implicated in chemotherapy resistance, including RRM1, TS, ERCC1 and TOPO1. cMET was overexpressed in melanoma brain metastases relative to primary skin specimens. Brain metastasis patients may particularly benefit from therapeutic targeting of enzymes associated with DNA synthesis, replication and\/or repair.<\/jats:p>","DOI":"10.1002\/ijc.31624","type":"journal-article","created":{"date-parts":[[2018,6,20]],"date-time":"2018-06-20T05:41:31Z","timestamp":1529473291000},"page":"3019-3026","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":40,"title":["Profiles of brain metastases: Prioritization of therapeutic targets"],"prefix":"10.1002","volume":"143","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6344-0615","authenticated-orcid":false,"given":"Sherise D.","family":"Ferguson","sequence":"first","affiliation":[{"name":"Departments of Neurosurgery The University of Texas MD Anderson Cancer Center  Houston TX"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Siyuan","family":"Zheng","sequence":"additional","affiliation":[{"name":"Departments of Genome Medicine The 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