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- W3028501472 abstract "Free fatty acids (FA) are a vital component of cells and are critical to cellular structure and function, so much so that alterations in FA are often associated with cell malfunction and disease. Analysis of FA from biological samples can be achieved by mass spectrometry (MS), but these analyses are often not capable of distinguishing the fine structural alterations within FA isomers and often limited to global profiling of lipids without spatial resolution. Here, we present the use of ultraviolet photodissociation (UVPD) for the characterization of double bond positional isomers of charge inverted dication·FA complexes and the subsequent implementation of this method for online desorption electrospray ionization (DESI) MS imaging of FA isomers from human tissue sections. This method allows relative quantification of FA isomers from heterogeneous biological tissue sections, yielding spatially resolved information about alterations in double bond isomers within these samples. Applying this method to the analysis of the monounsaturated FA 18:1 within breast cancer subtypes uncovered a correlation between double bond positional isomer abundance and the hormone receptor status of the tissue sample, an important factor in the prognosis and treatment of breast cancer patients. This result further validates similar studies that suggest FA synthase activity and FA isomer abundances are significantly altered within breast cancer tissue." @default.
- W3028501472 created "2020-05-29" @default.
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- W3028501472 date "2020-05-18" @default.
- W3028501472 modified "2023-10-18" @default.
- W3028501472 title "Double Bond Characterization of Free Fatty Acids Directly from Biological Tissues by Ultraviolet Photodissociation" @default.
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- W3028501472 doi "https://doi.org/10.1021/acs.analchem.0c00970" @default.
- W3028501472 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7433749" @default.
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