Snail augments fatty acid oxidation by suppression of mitochondrial ACC2 during cancer progression

Area of Science:

• Oncology
• Cancer Metabolism
• Molecular Biology

Background:

• Mitochondrial fatty acid oxidation (FAO) is crucial in cancer metabolism, but its mechanisms and therapeutic targeting remain unclear.
• The transcriptional repressor Snail (SNAI1) is linked to epithelial-mesenchymal transition and cancer progression.

Purpose of the Study:

• To elucidate the role of Snail in regulating FAO in breast cancer.
• To investigate the potential of targeting Snail-mediated metabolic reprogramming for cancer therapy.

Main Methods:

• Analysis of Snail's regulation of mitochondrial enzymes, including ACC2.
• Assessment of malonyl-CoA levels and carnitine palmitoyltransferase 1 (CPT1) activity.
• In vivo studies using combinatorial pharmacologic inhibition of pentose phosphate pathway and FAO.

Main Results:

• Snail suppresses mitochondrial ACC2, reducing malonyl-CoA levels and activating CPT1-dependent FAO.
• This metabolic reprogramming enhances ATP production and survival in starved breast cancer cells.
• Combined inhibition of pentose phosphate pathway and FAO reversed metabolic changes and suppressed metastasis in vivo.

Conclusions:

• Snail links epithelial-mesenchymal transition to catabolic rewiring, promoting cancer cell survival.
• Targeting FAO and pentose phosphate pathway represents a promising, novel catabolism-based therapeutic strategy for breast cancer.
• This study provides a mechanistic basis for developing new anti-cancer treatments focused on metabolic vulnerabilities.