Multiple Cellular Signaling Pathways

Multiple Cellular Signaling Pathways refers to the integrated and complex networks of biochemical reactions that allow cells to perceive and respond to their environment (Nature Reviews Molecular Cell Biology, 2012). These pathways, such as the MAPK/ERK, PI3K/Akt/mTOR, and JAK/STAT cascades, involve a series of molecular events—often phosphorylation—that transmit signals from the cell surface to the nucleus to regulate gene expression (Cell, 2018). Dysregulation of these signaling networks is a fundamental driver of various pathologies, most notably in oncology, where aberrant signaling promotes uncontrolled cell growth and survival (Signal Transduction and Targeted Therapy, 2021). While many therapeutic agents are designed to inhibit specific nodes within these pathways, the term itself describes a functional grouping rather than a single druggable target. Consequently, modern drug discovery often focuses on multi-target inhibitors or combination therapies to overcome the redundancy and crosstalk inherent in these systems (Pharmacological Reviews, 2017). Because these pathways are essential for normal physiological functions, broad or non-specific inhibition often results in significant systemic toxicity and therapeutic challenges.

Other names

Signal transduction networksCellular signaling cascadesIntracellular signaling pathwaysSignaling systems

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