Large-Scale Profiling of Cellular Metabolic Activities Using Deep ¹³C Labeling Medium

Area of Science:

• Metabolomics
• Systems Biology
• Biochemistry

Background:

• Metabolic activity profiling is crucial for understanding cellular function and disease.
• Isotope tracing offers a powerful approach to study metabolic pathways.
• Existing methods may lack the scale or resolution for comprehensive analysis.

Purpose of the Study:

• To provide a detailed protocol for the deep labeling method in cultured mammalian cells.
• To enable large-scale metabolic profiling using ¹³C-enriched media and mass spectrometry.
• To facilitate the identification of active metabolic pathways and endogenous metabolites.

Main Methods:

• Synthesis of a highly ¹³C enriched culture medium.
• Culturing mammalian cells under deep labeling conditions.
• Metabolite extraction, sample preparation, and liquid chromatography-high resolution mass spectrometry (LC-MS).
• Data analysis workflow using publicly available software.

Main Results:

• Successful implementation of the deep labeling method for comprehensive metabolic profiling.
• Identification of endogenous cellular products and active metabolic pathways.
• Generation of detailed mass spectrometry data sets with observable ¹³C mass isotopomers.

Conclusions:

• The deep labeling method provides a robust platform for large-scale metabolic activity profiling.
• This protocol enables detailed investigation of cellular metabolism in mammalian cell cultures.
• The described workflow supports the analysis of complex metabolic networks.