RNA Modifications in Health and Disease.

RNA modifications, including N6-methyladenosine (m6A), 5-methylcytosine, and pseudouridine, serve as pivotal regulators of gene expression with significant implications for human health and disease. These dynamic modifications influence RNA stability, splicing, translation, and interactions, thereby orchestrating critical biological processes such as embryonic development, immune response, and cellular homeostasis. Dysregulation of RNA modifications is closely associated with a variety of pathologies. This review systematically synthesizes recent advances in understanding how dynamic RNA modifications orchestrate health and disease. We critically review the m6A modifications, the most abundant RNA methylation, its association with diseases, and regulations by post translation. We evaluate three interconnected themes: disease mechanisms, where dysregulated m6A drives oncogenesis (e.g., METTL3-mediated hypermethylation in breast cancer) and contributes to neuropsychiatric/cardiovascular disorders; homeostatic functions, spanning embryogenesis (maternal-to-zygotic transition), tissue regeneration (YTHDF1 in muscle), and immune regulation; therapeutic frontiers, including enzyme-targeting strategies (FTO inhibitors, METTL3 stabilizers) and diagnostic approaches. Our analysis reveals that context-dependent RNA modification networks operate as biological "switches" whose dysregulation creates pathogenic cascades. We further propose a novel framework for targeting these networks using multiomics integration. This review establishes RNA modifications as central targets for precision medicine, while highlighting critical challenges in clinical translation that demand interdisciplinary collaboration.