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Data-independent proteomic screen identifies novel tamoxifen agonist that mediates drug resistance.


ABSTRACT: A label-free quantitative variation of the recently developed data-independent shotgun proteomic method precursor acquisition independent from ion count (PAcIFIC) was used to identify novel proteins implicated in cancer progression and resistance. Specifically, this screen identified the pro-metastatic protein anterior gradient 2 (AGR2) as significantly up-regulated in tamoxifen-treated cells. Highlighting the need for direct proteome profiling methods like PAcIFIC, neither data-dependent gas-phase fractionation nor a transcriptomic screen detected AGR2 protein/transcript at significantly up-regulated levels. Further cell-based experiments using human cancer cell lines and in vivo xenografts confirmed the PAcIFIC hypothesis that AGR2 is up-regulated in MCF-7 cells post tamoxifen treatment and that it is implicated in drug resistance mediation.

SUBMITTER: Hengel SM 

PROVIDER: S-EPMC3242698 | biostudies-literature | 2011 Oct

REPOSITORIES: biostudies-literature

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Data-independent proteomic screen identifies novel tamoxifen agonist that mediates drug resistance.

Hengel Shawna Mae SM   Murray Euan E   Langdon Simon S   Hayward Larry L   O'Donoghue Jean J   Panchaud Alexandre A   Hupp Ted T   Goodlett David R DR  

Journal of proteome research 20110921 10


A label-free quantitative variation of the recently developed data-independent shotgun proteomic method precursor acquisition independent from ion count (PAcIFIC) was used to identify novel proteins implicated in cancer progression and resistance. Specifically, this screen identified the pro-metastatic protein anterior gradient 2 (AGR2) as significantly up-regulated in tamoxifen-treated cells. Highlighting the need for direct proteome profiling methods like PAcIFIC, neither data-dependent gas-ph  ...[more]

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