Transfer RNA Fragments in Diseases of Sensory Organs.

Transfer RNA-derived fragments (tRFs) have been recently recognized for their multiple roles in gene expression, including modulation of translation, mRNA stability, and cellular signaling pathways. Sensory organs, such as the eyes, skin, and oral cavity, are continuously exposed to environmental stressors, including oxidative stress, ultraviolet radiation, microbial challenges, and mechanical stimuli, making them particularly susceptible to dysregulation of RNA-mediated processes. This review comprehensively summarizes current evidence on the role of tRFs in sensory organ physiology and pathology with a focus on their involvement in key processes, such as angiogenesis, inflammation, immune regulation, and fibrosis. tRFs have been shown to influence critical signaling pathways that are central to diseases such as retinal neovascularization, inflammatory skin conditions, wound healing, tissue remodeling, etc. Despite these advances, the field remains limited by a lack of experimentally validated tRF-target interactions, as most available data rely on computational predictions. The findings from the literature emphasize the need for rigorous functional validation in disease-relevant models of tRFs in biofluids, such as saliva and serum, to support their potential as minimally invasive biomarkers. Further translational studies are required to fully elucidate their biological roles and explore their potential in diagnostic and therapeutic applications.