Decoding Cell Signaling: Pathways, Mechanisms, and Clinical Insights provides a comprehensive guide to the principles and mechanisms of cell signaling, covering both foundational and advanced topics. It explores diverse signaling mechanisms, including G-protein coupled receptors, receptor tyrosine kinases, and steroid hormone signaling. The book delves into key intracellular pathways like MAPK/ERK and PI3K/Akt/mTOR, illuminating their roles in processes such as growth and immune regulation. It also links these pathways to physiological functions in human organs and discusses cutting-edge techniques like mass spectrometry and single-cell analysis. The book concludes with clinical implications and future research directions, making it a valuable resource for students, researchers, and professionals.