Cellular survival signaling

Cellular survival signaling refers to a complex network of intracellular biochemical pathways that promote cell viability and actively inhibit programmed cell death, or apoptosis. These pathways, most notably the PI3K/Akt/mTOR and Ras/Raf/MEK/ERK cascades, integrate extracellular signals from growth factors and cytokines to regulate fundamental processes such as protein synthesis, metabolism, and cell cycle progression (Source: NIH, PMC4481112). In a physiological context, these signals are tightly regulated to maintain tissue homeostasis; however, their dysregulation is a hallmark of many diseases, particularly cancer, where constitutive activation allows malignant cells to survive under stress and evade therapeutic intervention (Source: Hanahan & Weinberg, Cell). While 'Cellular survival signaling' is a critical therapeutic concept, it is not a single molecular target but rather a collection of pathways containing numerous druggable enzymes and receptors (Source: Nature Reviews Molecular Cell Biology). Drugs targeting these pathways, such as kinase inhibitors or Bcl-2 antagonists, aim to restore normal apoptotic sensitivity in diseased cells (Source: StatPearls). Challenges in targeting these processes include significant systemic toxicity due to the pathways' roles in normal cell function and the rapid emergence of drug resistance via compensatory signaling mechanisms.

Other names

Cell survival pathwaysPro-survival signalingAnti-apoptotic signaling cascadesCell viability pathways

Inhibition of specific signaling nodes such as kinases (e.g., PI3K, Akt, mTOR, MEK) or anti-apoptotic proteins (e.g., Bcl-2) to disrupt survival signals and induce apoptosis in pathological cells.