Defining Metabolic Rewiring in Lung Squamous Cell Carcinoma

Area of Science:

• Biochemistry
• Oncology
• Metabolomics

Background:

• Lung Squamous Cell Carcinoma (SCC) is a major subtype of Non-Small Cell Lung Cancers (NSCLCs) with poor prognosis.
• Metabolomics offers a snapshot of cellular metabolism, crucial for understanding cancer progression.

Purpose of the Study:

• To investigate metabolic rewiring in lung SCC using untargeted metabolomics.
• To identify novel metabolic biomarkers for SCC diagnosis and prognosis.

Main Methods:

• Untargeted flow infusion electrospray ionization high-resolution mass spectrometry (FIE-HRMS) was employed for metabolite profiling.
• Statistical analyses including t-tests and principal component analysis (PCA) were performed.
• Pathway analysis utilized the mummichog algorithm and Metabolite Set Enrichment Analysis (MSEA).

Main Results:

• Identified metabolic rewiring networks, including suppressed oxidative pentose pathway.
• Observed decoupling of the tricarboxylic acid (TCA) cycle from glycolysis and glutamine reductive carboxylation.
• Detected novel alterations in SCC, such as increased Vitamin B cofactors, serotonin, and reduced gamma-aminobutyric acid (GABA).

Conclusions:

• FIE-HRMS is a valuable high-throughput screening tool for lung SCC metabolomics.
• Metabolic alterations in SCC involve significant rewiring of central carbon metabolism.
• Findings highlight potential for FIE-HRMS in clinical applications for lung cancer detection.