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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/18883

Title: Comparing Tyrosine Phosphorylation Changes after Erlotinib Treatment betweem Drug Sensitive and Drug Resistant Non-small Cell Lung Cancer Lines by Mass Spectrometry
Authors: Shih, Warren
Advisor: Tsao, Ming-Sound
Department: Laboratory Medicine and Pathobiology
Keywords: EGFR
Non-Small Cell Lung Cancer
Erlotinib/Tarceva
Proteomics
Cell Signaling
Issue Date: 15-Feb-2010
Abstract: Non-Small-Cell-Lung Cancer (NSCLC) patients with mutations in EGFR have greater response rates and survival when treated with the tyrosine kinase inhibitor erlotinib. To elucidate how erlotinib inhibits EGFR, this study included: 1) inhibiting an EGFR mutant cell line to reveal EGFR regulated phosphotyrosine (pY) sites; 2) comparing erlotinib sensitive and insensitive cell lines to reveal functionally important pY sites; 3) revealing novel pY sites. Observations were collected using the LTQ-Orbitrap mass spectrometer. This study identified five new EGFR regulated pY sites and five pY sites that correlated with erlotinib sensitivity; the majority of them are related to cell-cell interactions. By comparing all observed pY sites to the Phosphosite and PhosphoELM database, our results included 67 unregistered sites. This study has identified novel biomarkers and potential therapeutic targets, many of which were associated with cell migration and adhesion function. Further functional validation is necessary.
URI: http://hdl.handle.net/1807/18883
Appears in Collections:Master
Department of Laboratory Medicine and Pathobiology - Master theses

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