Redox regulation of focal adhesions.

Focal adhesions (FAs), multi-protein complexes that link the extracellular matrix to the intracellular cytoskeleton, are key mediators of cell adhesion, migration, and proliferation. These dynamic structures act as mechanical sensors, transmitting stimuli from the extracellular to intracellular environment activating in this way signaling pathways and enabling cells to adapt to environmental changes. As such, FAs are critical for tissue organization and serve as hubs governing cell spatial arrangement within the organism. The assembly, reactivity, and functional regulation of FAs are tightly controlled by post-translational modifications, including redox modulation by reactive oxygen and nitrogen species. Increasing evidence suggests that redox signaling plays a pivotal role in both the physiological and pathological functions of FAs and their downstream processes. Redox regulation affects various components of the FA complex, including integrins, focal adhesion kinase 1 (FAK1), SRC, adapter proteins, and cytoskeletal elements. In this review, we provide an updated overview of the complex interplay between redox signaling and post-translational modifications in FAs. We explore how redox reactions influence the structure, dynamics, and function of FAs, shedding light on their broader implications in health and disease.