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. 2023 May 19;15(10):2842. doi: 10.3390/cancers15102842

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Principal component analysis of CL profiles extracted from regions of pure tumor cell or normal grey matter analyzed by DESI-FAIMS-MS. (A) Score plot of individuals. S/N of CL species were extracted from DESI-FAIMS-MS pixels corresponding to regions of pure, viable tumor or normal grey matter and averaged on a per-patient basis. Data are centered and log transformed. PC1 and PC2 account for 75.2% and 10.8% of dataset variability, respectively. 90% concentration ellipses are shown. (B) Loading plot showing the direction of contribution of the 10 m/z features with the highest contribution to the PCs. Feature vectors and their corresponding molecular species are colored according to their contribution (%).