Warpgroup

Warpgroup improves processing of hydrophilic interaction liquid chromatography (HILIC) LC-MS data by detecting peak subregions, determining consensus integration bounds, and performing intelligent missing-value imputation to increase analyte coverage in metabolomics analyses.

Key Features:

• Peak Subregion Detection: Detects chromatographic peak subregions to improve peak identification and quantification in complex LC-MS datasets.
• Consensus Integration Bound Determination: Determines consensus integration bounds across samples to reduce variability in integration regions and improve consistency of quantification.
• Intelligent Missing-Value Imputation: Implements an imputation strategy that rescues signals otherwise lost by naive approaches, increasing analyte coverage.
• XCMS Compatibility: Provides compatibility wrappers for XCMS to integrate Warpgroup processing with existing XCMS-based workflows.

Scientific Applications:

• HILIC LC-MS Metabolomics: Improves detection and quantification in HILIC LC-MS metabolomics datasets, including analyses of Escherichia coli extracts.
• Reduction of Technical Variability: Empirical testing reported halving the coefficient of variation by 19% across replicate injections.
• Increased Analyte Coverage: Refined integration regions and imputation rescue signals and expand coverage in processed datasets.

Methodology:

Implements peak subregion detection, consensus integration bound determination, and intelligent missing-value imputation; implemented in R with compatibility wrappers for XCMS.