Tag

Cgas

All articles tagged with #cgas

health-and-science1 year ago

"Discovery of Immune System 'Switch' Prevents Attack on Healthy Cells"

Scientists have identified a "switch" that deactivates a sensor of foreign DNA, preventing the immune system from attacking healthy cells. This switch, a protein complex named CRL5–SPSB3, marks the enzyme cGAS for disposal when no immune response is required, providing insight into immune system regulation. Understanding this process could lead to potential therapeutic developments for autoimmune disorders, as it sheds light on how the immune system controls malfunction in conditions like type 1 diabetes and inflammatory bowel disease.

medical-research2 years ago

"Collaborative DNA Repair System Unlocks Potential Breast Cancer Prevention"

A study investigates how tumors adapt to tolerate DNA damage caused by replication stress through alterations in DNA damage response (DDR) genes. The findings suggest that MRE11, a DNA repair protein, plays a crucial role in suppressing breast tumorigenesis driven by MYC overexpression and p53 deficiency by promoting cGAS activation and initiating downstream innate immune responses. MRE11 was found to stimulate cGAS activation by antagonizing nucleosome sequestration, leading to the suppression of tumor growth and increased proliferation despite heightened genome instability. This study provides insights into the mechanisms involved in transducing DNA damage signals to activate cGAS and initiate innate immune responses during tumorigenesis.