Cysteine and Folate Metabolism Are Targetable Vulnerabilities of Metastatic Colorectal Cancer

Area of Science:

• Oncology
• Cancer Metabolism
• Molecular Biology

Background:

• Metastatic colorectal cancer (mCRC) is a leading cause of cancer-related mortality.
• Understanding metabolic adaptations in mCRC is critical for developing effective therapies.
• Metabolic vulnerabilities specific to metastatic progression remain largely undefined.

Purpose of the Study:

• To identify targetable metabolic vulnerabilities in metastatic colorectal cancer.
• To elucidate metabolic differences between primary and metastatic colorectal cancer cells.

Main Methods:

• Metabolic characterization of matched primary (SW480) and metastatic (SW620, SW620-LiM2) colorectal cancer cell lines.
• Utilized a novel multi-omics integration workflow to identify specific metabolic vulnerabilities.
• Assessed the impact of inhibiting cystine import and folate metabolism pathways.

Main Results:

• Metastatic colorectal cancer cell lines exhibit selective vulnerability to inhibition of cystine import and folate metabolism.
• These pathways are crucial for maintaining redox homeostasis in metastatic cells.
• Identified system xCT and MTHFD1 as key genes and potential therapeutic targets.

Conclusions:

• Inhibition of cystine import and folate metabolism represents a promising therapeutic strategy for mCRC.
• Targeting system xCT and MTHFD1, individually or in combination, could combat metastatic colorectal cancer.
• Elucidation of metabolic adaptations provides novel targets for improving patient survival in mCRC.