Trophic factor pathways

Trophic factor pathways represent a complex network of signaling cascades that are fundamental to the survival, growth, and functional maintenance of cells, particularly neurons within the central and peripheral nervous systems (NIH, 2008; University of Minnesota, 2023). These pathways are primarily driven by neurotrophins, such as Nerve Growth Factor (NGF) and Brain-Derived Neurotrophic Factor (BDNF), which exert their effects by binding to high-affinity Tropomyosin receptor kinases (TrkA, TrkB, and TrkC) and the low-affinity p75 neurotrophin receptor (ACS, 1992; Google Patents, 2019). Activation of these receptors triggers critical downstream signaling mediators, including the PI3K/Akt, MAPK/ERK, and PLC-gamma pathways, which collectively promote anti-apoptotic programs and synaptic plasticity (NIH, 2007; MDPI, 2023). Dysregulation of trophic factor signaling is a key pathological feature in neurodegenerative diseases like Alzheimer's and Parkinson's, as well as in psychiatric disorders such as major depressive disorder (Frontiers in Pharmacology, 2023). In the context of oncology, genetic alterations such as NTRK gene fusions lead to constitutive activation of these pathways, serving as potent oncogenic drivers (ACS, 1992). Therapeutic interventions targeting these pathways include Trk inhibitors for cancer treatment and neurotrophic mimetics or recombinant factors aimed at neuroprotection and pain management (Frontiers in Pharmacology, 2023; MDPI, 2023).

Other names

Neurotrophic factor signalingGrowth factor signaling pathwaysNeurotrophin signaling pathwaysSurvival signaling pathways

Modulation of neurotrophic signaling through receptor inhibition, ligand sequestration, or mimetic activation of Trk receptors to regulate cell survival and growth.