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Title: Statistical detection of differentially abundant ions in mass spectrometry-based imaging experiments with complex designs

Journal Article · · International Journal of Mass Spectrometry

Mass Spectrometry Imaging (MSI) characterizes changes in chemical composition between regions of biological samples such as tissues. This translates into a statistical goal of class comparison, i.e. determining analytes that change in abundance between conditions more systematically than as expected by random variation. To reach accurate and reproducible conclusions, statistical analysis must appropriately reflect the initial research question, the design of the MSI experiment, and all the associated sources of variation. This manuscript highlights the importance of following these general statistical principles. Using the example of two case studies with complex experimental designs, and with dierent strategies of data acquisition, we demonstrate the extent to which choices made at key points of this workflow impact the results, and provide suggestions for appropriate design and analysis of MSI experiments that aim at detecting dierentially abundant analytes.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1501645
Report Number(s):
PNNL-SA-128968
Journal Information:
International Journal of Mass Spectrometry, Vol. 437, Issue C; ISSN 1387-3806
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

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