GOT1 Inhibition Induces Extracellular Matrix Remodeling in Pancreatic Cancer

Area of Science:

• Oncology
• Cancer Metabolism
• Tumor Microenvironment (TME) Research

Background:

• Pancreatic cancer cells depend on glutamine for survival within the challenging tumor microenvironment (TME).
• Targeting glutamine metabolism via glutamic-oxaloacetic transaminase 1 (GOT1) inhibition is a potential therapeutic strategy.
• The impact of GOT1 inhibition on cellular and extracellular TME components remains largely unexplored.

Purpose of the Study:

• To investigate the effects of GOT1 inhibition on the pancreatic TME.
• To elucidate the metabolic crosstalk between cancer cells and stromal cells within the TME.
• To understand how TME elements modulate cancer cell responses to GOT1 inhibition.

Main Methods:

• Engineered a pancreatic TME model 'on a dish' to simulate tissue-like conditions and metabolic interactions.
• Analyzed cellular and extracellular matrix remodeling in response to GOT1 inhibition.
• Assessed changes in metabolic programs, cell viability, proliferation, and matrix organization.

Main Results:

• Stromal cells within the TME remodeled the extracellular matrix and upregulated key metabolic pathways.
• GOT1 inhibition reduced pancreatic cancer cell viability and proliferation specifically under tissue-like conditions.
• GOT1 inhibition altered matrix organization by upregulating matrix-related proteins but did not improve responses to cytotoxic drugs.

Conclusions:

• Metabolic crosstalk within the TME significantly influences cancer cell responses to GOT1 inhibition.
• GOT1 inhibition directly impacts stromal components of the pancreatic TME, affecting matrix organization.
• Targeting cancer metabolism offers a novel approach to modulate the TME in pancreatic cancer.