Intracellular signaling pathways

Intracellular signaling pathways represent the complex networks of molecular interactions that transmit signals from a cell's surface to its interior, ultimately regulating various cellular processes (StatPearls: Signal Transduction). These pathways typically involve a cascade of events, including the activation of receptors, the generation of second messengers, and the sequential phosphorylation of proteins by kinases (NIH: Cell Signaling). They are essential for maintaining cellular homeostasis and allowing cells to respond appropriately to environmental cues such as hormones and growth factors. Dysregulation of these pathways is a primary driver in numerous pathologies, including oncogenesis, where aberrant signaling promotes survival and proliferation (Nature: Intracellular signaling). While these pathways are not single therapeutic targets, they contain numerous specific proteins—such as kinases and phosphatases—that serve as critical points for pharmacological intervention. The complexity of these networks, including significant crosstalk between different pathways, presents both opportunities and challenges for modern drug development (PubMed: Signaling Crosstalk).

Other names

Signal transduction pathwaysIntracellular signaling cascadesCell signaling pathwaysSignal transduction

Not applicable as this refers to a broad biological category of processes rather than a specific molecular target.