NGF

NGF Full Name

Nerve growth factor

NGF Introduction

Nerve Growth Factor (NGF) is one of the earliest discovered neurotrophins and remains a central target in neuroscience and translational medicine due to its essential role in neuronal survival, differentiation, and maintenance. NGF exerts its biological effects primarily by binding to high-affinity TrkA receptors and the low-affinity p75NTR receptor, forming a tightly regulated signaling system that determines whether a cell undergoes survival or apoptosis. In healthy physiology, NGF supports neuronal growth and synaptic plasticity, while its precursor form, pro-NGF, can activate distinct receptor complexes involving p75NTR and sortilin, often triggering opposing outcomes such as apoptosis. This delicate balance is increasingly recognized as a critical vulnerability in multiple disease states, where disrupted NGF maturation, transport, or receptor expression can shift signaling away from neuroprotection toward neurodegeneration or pathological remodeling.

Beyond the nervous system, NGF signaling is deeply involved in inflammatory regulation, vascular biology, and tissue remodeling, making it a pleiotropic factor in human health and disease. Activation of TrkA downstream pathways such as PI3K/Akt and Ras/MAPK promotes cell survival, angiogenesis, proliferation, and migration, while p75NTR-mediated NF-κB signaling can amplify inflammatory and pro-survival or pro-apoptotic responses depending on cellular context. In acute and chronic injury settings, NGF contributes to neuroprotection by suppressing inflammatory cascades (including NF-κB and JNK pathways), stabilizing mitochondrial function, and supporting neurogenesis and angiogenic recovery. However, dysregulation of NGF/pro-NGF balance can exacerbate pathological signaling, highlighting why simply increasing NGF levels is often insufficient without restoring receptor-level and intracellular signaling equilibrium.

Clinically, NGF dysregulation has been implicated across a wide spectrum of diseases, including neurodegenerative disorders, cancer, bone diseases, and traumatic injury. In Alzheimer's disease, impaired NGF transport and reduced TrkA signaling—combined with excessive p75NTR-mediated apoptotic signaling—are strongly associated with cholinergic neuron degeneration and cognitive decline, explaining why NGF-based therapies require precise delivery strategies rather than systemic supplementation. In oncology, NGF and pro-NGF signaling can promote tumor progression through enhanced proliferation, invasion, angiogenesis, and anti-apoptotic pathways, particularly via NF-κB and MAPK activation in tumor microenvironments such as breast cancer. Meanwhile, emerging evidence also links NGF to bone remodeling, osteogenesis, and fracture repair, as well as to recovery processes following brain injury, where it helps counteract excitotoxicity, inflammation, and neuronal loss. Together, these findings position NGF as a high-value but context-sensitive therapeutic target, where successful intervention depends on fine-tuning receptor signaling rather than simple ligand modulation.

Alternate Names for NGF

NGF; Beta-NGF; HSAN5; NGFB; PG110; ABT-110

• 1.Bruno F, et al.; Expression and Signaling Pathways of Nerve Growth Factor (NGF) and Pro-NGF in Breast Cancer: A Systematic Review. Curr Oncol. 2022, 29(11):8103-8120.
  2.Koya PC, et al.; Potential of Nerve Growth Factor (NGF)- and Brain-Derived Neurotrophic Factor (BDNF)-Targeted Gene Therapy for Alzheimer's Disease: A Narrative Review. Cureus. 2025, 17(6):e85814.