Checkmate: Metabolic flexibility with a STING in its tail

Area of Science:

• Biochemistry
• Immunology
• Oncology

Background:

• Cancer cells rely on specific metabolic pathways for survival and proliferation.
• Tumor microenvironments in immunotherapy-resistant cancers present unique challenges for T cell activity.
• ATP citrate lyase (ACLY) is a key enzyme in cellular metabolism, linking carbohydrate and lipid synthesis.

Purpose of the Study:

• To investigate the impact of inhibiting ATP citrate lyase (ACLY) on T cell function within the context of immunotherapy-resistant tumors.
• To explore ACLY as a potential therapeutic target for enhancing anti-tumor immunity.

Main Methods:

• Utilized genetic or pharmacological inhibition of ACLY in preclinical cancer models.
• Assessed T cell activation, proliferation, and cytotoxic function in tumor microenvironments.
• Analyzed metabolic profiles of cancer cells and infiltrating T cells.

Main Results:

• ACLY inhibition in cancer cells altered the tumor microenvironment.
• Inhibition of ACLY modulated T cell function, leading to improved anti-tumor responses.
• Metabolic reprogramming by ACLY inhibition created a more favorable environment for T cell activity.

Conclusions:

• Targeting ACLY represents a promising strategy to overcome resistance to cancer immunotherapy.
• Modulating cancer cell metabolism via ACLY inhibition can enhance anti-tumor T cell immunity.