Biomarker Accessible and Chemically Addressable Mechanistic Subtypes of BRAF Melanoma
dc.contributor.advisor | DeBerardinis, Ralph J. | en |
dc.contributor.committeeMember | White, Michael A. | en |
dc.contributor.committeeMember | Brekken, Rolf A. | en |
dc.contributor.committeeMember | Cobb, Melanie H. | en |
dc.creator | Eskiocak, Banu | en |
dc.date.accessioned | 2018-08-24T20:38:12Z | |
dc.date.available | 2018-08-24T20:38:12Z | |
dc.date.created | 2016-08 | |
dc.date.issued | 2016-06-23 | |
dc.date.submitted | August 2016 | |
dc.date.updated | 2018-08-24T20:31:42Z | |
dc.description.abstract | Genomic diversity and adaptive plasticity of melanoma tumors limit durable control with conventional and targeted therapies. Nevertheless, pathological activation of the ERK1/2 regulatory system is a linchpin tumorigenic mechanism associated with the majority of both primary and recurrent disease. To avoid common resistance mechanisms associated with perdurance of ERK1/2 signaling, we sought to identify therapeutic targets that are selectively required for tumorigenicity in the presence of pathological ERK1/2 signaling. Such targets could be leveraged in jiu jitsu fashion to breach selective pressure to engage any of the many BRAF-independent ERK1/2 pathway activation mechanisms. By integration of multi-genome chemical and genetic screens; recurrent architectural variants in melanoma tumor genomes; and patient outcome data; we identified 2 mechanistic subtypes of BRAF(V600) melanoma that inform new cancer cell biology and offer new therapeutic opportunities. Subtype membership defines sensitivity to clinical MEK inhibitors versus TBK1/IKBKE inhibitors. Importantly, subtype membership can be predicted using a robust quantitative 5-feature genetic biomarker. This biomarker, or the mechanistic relationships linked to it, can identify a cohort of best responders to clinical MEK inhibitors (detectable in 25% of melanoma patients) and identify a cohort of TBK1/IKBKE inhibitor-sensitive disease among non-responders to current targeted therapy (detectable in 9.9% of melanomas). | en |
dc.format.mimetype | application/pdf | en |
dc.identifier.oclc | 1049807458 | |
dc.identifier.uri | https://hdl.handle.net/2152.5/5733 | |
dc.language.iso | en | en |
dc.subject | Biomarkers | en |
dc.subject | DNA Copy Number Variations | en |
dc.subject | MAP Kinase Signaling System | en |
dc.subject | Melanoma | en |
dc.subject | Skin Neoplasms | en |
dc.title | Biomarker Accessible and Chemically Addressable Mechanistic Subtypes of BRAF Melanoma | en |
dc.type | Thesis | en |
dc.type.material | text | en |
thesis.degree.department | Graduate School of Biomedical Sciences | en |
thesis.degree.discipline | Cancer Biology | en |
thesis.degree.grantor | UT Southwestern Medical Center | en |
thesis.degree.level | Doctoral | en |
thesis.degree.name | Doctor of Philosophy | en |