Cell Intrinsic Immunity Spreads Via Intercellular cGAMP Transfer

An author correction published in Nature on August 14, 2026, clarifies a key mechanism by which cellular intrinsic immunity can spread to neighboring, uninfected cells. The correction specifically addresses the intercellular transfer of cyclic GMP-AMP (cGAMP), a second messenger molecule, as the means by which this immune signaling propagates. This finding has significant implications for understanding innate immune responses and the development of novel therapeutic strategies against infectious diseases and cancer.

Previously, research had established that cells possess intrinsic defense mechanisms that can be activated upon detecting pathogens or cellular stress. However, the precise pathways through which these protective signals are communicated to adjacent cells, particularly those not directly experiencing the initial threat, remained an area of active investigation. The author correction in Nature, associated with the publication doi:10.1038/s41586-026-11023-3, pinpoints the intercellular transfer of cGAMP as a critical component of this communication process. cGAMP is known to activate the STING (Stimulator of Interferon Genes) pathway, a central regulator of innate immunity that promotes the production of type I interferons and other antiviral and anti-tumor mediators.

The intercellular transfer of cGAMP allows a cell that has initiated an intrinsic immune response to effectively 'warn' its neighbors. This transfer can occur through various mechanisms, including gap junctions or the release of extracellular vesicles, although the specific modes of transfer may vary depending on the cell type and context. By transferring cGAMP, the activated cell primes bystander cells to mount a more robust and rapid defense should they subsequently encounter the same threat. This coordinated response enhances the overall resilience of tissues and organs against pathogens and oncogenic transformations.

This clarification by the authors of the Nature study provides a more complete picture of how innate immunity operates at a multicellular level. It suggests that targeting the intercellular transfer of cGAMP could be a viable strategy for boosting immune responses. For instance, in the context of viral infections, enhancing cGAMP transfer could lead to a more effective and widespread antiviral state within infected tissues. Similarly, in cancer immunotherapy, promoting cGAMP transfer could help activate anti-tumor immune responses in the tumor microenvironment, making it more susceptible to immune attack or therapeutic intervention. The research underscores the sophisticated communication networks that exist within the immune system and highlights the potential for manipulating these pathways for therapeutic benefit.