cGAS-STING signaling in ischemic diseases

Area of Science:

• Immunology
• Molecular Biology
• Cell Biology

Background:

• Double-stranded DNA (dsDNA) acts as a damage-associated molecular pattern (DAMP), initiating innate immune responses.
• The cyclic GMP-AMP (cGAMP) synthase (cGAS)-stimulator of interferon gene (STING) pathway is a key sensor of dsDNA, leading to type I interferon (IFN) synthesis.
• This pathway intricately links with various cell death modalities, including apoptosis, pyroptosis, and necroptosis.

Purpose of the Study:

• To provide an overview of studies investigating the cGAS-STING signaling pathway in conjunction with cell death.
• To summarize the role and findings of the cGAS-STING pathway in the context of ischemia or ischemia/reperfusion (I/R) injury across multiple organs.

Main Methods:

• Literature review and synthesis of existing research on cGAS-STING signaling, cell death, and I/R injury.
• Analysis of studies examining the impact of self-DNA (nuclear and mitochondrial) in activating the cGAS-STING pathway.

Main Results:

• The cGAS-STING pathway is activated by self-DNA released from damaged cells, particularly after ischemic events.
• This activation contributes to various injury-related consequences in organs such as the heart, brain, liver, kidney, and intestine.
• The interplay between cGAS-STING signaling and cell death mechanisms is a significant factor in I/R injury.

Conclusions:

• The cGAS-STING pathway plays a critical role in the pathogenesis of ischemia/reperfusion injury by mediating inflammatory responses and cell death.
• Understanding the cGAS-STING pathway's interaction with cell death is vital for developing therapeutic strategies against organ damage.
• Further research into this pathway could uncover novel targets for treating ischemic diseases.