STING Signaling and Sterile Inflammation

Area of Science:

• Immunology
• Molecular Biology
• Cell Biology

Background:

• Innate immunity relies on receptors to monitor the environment and maintain host integrity.
• Receptors detect pathogens and aberrant self-molecules, signaling disturbed homeostasis.
• The cyclic GMP-AMP synthase (cGAS)/stimulator of interferon genes (STING) pathway senses self-nucleic acids, indicating cytoplasmic DNA presence.

Purpose of the Study:

• To review recent literature on the role of self-nucleic acid detection via the STING pathway.
• To explore STING's involvement in cell physiology, sterile injury, autoimmunity, and cancer.
• To discuss mechanisms of cytoplasmic DNA sensing.

Main Methods:

• Literature review of recent scientific publications.
• Analysis of studies investigating the cGAS/STING pathway.
• Synthesis of findings on STING's role in various diseases and cellular processes.

Main Results:

• Self-nucleic acid detection through the STING pathway is crucial for numerous biological processes.
• STING plays a significant role in autoimmune diseases, inflammatory conditions, neurodegeneration, and cancer.
• The pathway is linked to autophagy and cell death, with various proposed sources for cytoplasmic DNA.

Conclusions:

• The cGAS/STING pathway is a critical regulator of host defense and homeostasis.
• Dysfunctional STING signaling contributes to various pathologies, including autoimmune and inflammatory diseases.
• Understanding cytoplasmic DNA sources and STING activation is key to developing new therapeutic strategies.