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A mathematical framework for spectroscopy data analysis to characterize chemical-induced alterations in the SHE assay

Research output: Contribution to journalMeeting abstract

Published

Journal publication date11/2010
JournalMutagenesis
Journal number6
Volume25
Number of pages1
Pages658-658
Original languageEnglish

Abstract

Acquisition of IR spectra often generates complex datasets that are not readily interpretable for the purposes of deriving biomarkers. From a computational perspective, this raises the question of what multi-step processing is required and, whether there is a well-defined sequence of steps that can be applied to
objectively shed insight into a biological question. To generate a dataset to investigate this, we set up an in vitro transformation assay (pH 6.7) using Syrian hamster embryo (SHE) cells (1). SHE cells were interrogated by ATR-FTIR spectroscopy.
Derived mid-IR spectra (nspectra @14,000) were inputted into a computational framework designed for outlier removal, multivariate analysis and validation of the robustness of analysis, and biomarker identification. Biomarker identification
methods were independently applied and compared to identify common discriminating chemical entities. Stable biomarkers of chemical-induced alterations or transformation were identified and confirmed. The analysis framework was implemented in the form of a user-friendly graphical user interface using a programming toolkit designed for research on computational
methods. The database platform developed to store our dataset is scalable and can facilitate a data-sharing inter-laboratory process towards end-user applications for IR spectroscopy.