STING: a master regulator in the cancer-immunity cycle

Area of Science:

• Immunology
• Oncology
• Molecular Biology

Background:

• Aberrant cytoplasmic DNA activates cGAS-cGAMP-STING signaling, inducing type I interferons crucial for innate and adaptive immunity.
• STING activation and type I interferon production are vital for anticancer immune responses.
• Emerging evidence highlights STING's role in anticancer immunity independent of type I interferons.

Purpose of the Study:

• To review the multifaceted roles of STING in the cancer-immune response.
• To elucidate STING's involvement in the cancer-immunity cycle.
• To discuss both beneficial and detrimental effects of STING activation in cancer.

Main Methods:

• Literature review of studies on STING signaling and cancer immunity.
• Analysis of STING's type I interferon-dependent and independent mechanisms.
• Examination of STING's impact on various stages of the cancer-immunity cycle.

Main Results:

• STING activation induces cell death and cancer antigen release.
• STING enhances antigen presentation, T-cell priming, infiltration, and tumor cell killing.
• STING also exhibits negative effects and non-immune roles in cancer.

Conclusions:

• STING plays a complex role in anticancer immunity, acting through both interferon-dependent and independent pathways.
• Understanding STING's diverse functions is critical for developing novel cancer immunotherapies.
• Further research is needed to fully elucidate STING's non-immune roles and potential negative impacts in cancer.