| NGF | |
|---|---|
| Full Name | Nerve Growth Factor |
| Chromosome | 1p13.1 |
| Gene Type | Protein-coding gene |
| Encoded Protein | NGF (Beta-nerve growth factor) |
| Protein Family | Neurotrophin family |
| Receptor | TrkA (NTRK1), p75NTR (TNFRSF1B) |
| Major Pathways | TrkA signaling, p75NTR signaling, PI3K/Akt, MAPK/ERK, PLC-gamma |
| Primary Disease Links | Alzheimer's Disease, Peripheral Neuropathy, Diabetic Neuropathy |
| External IDs | NCBI Gene 4800; OMIM 162030; UniProt P01138 |
| Allen Brain Atlas | NGF expression |
Nerve Growth Factor (Ngf) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Nerve Growth Factor (NGF) is the founding member of the neurotrophin family of growth factors, essential for the development, survival, and function of specific neuronal populations in the central and peripheral nervous systems. Discovered by Rita Levi-Montalcini and Stanley Cohen in 1956, NGF was the first growth factor ever characterized and remains one of the most extensively studied neurotrophic molecules in neuroscience.1
NGF exerts its biological effects through binding to two distinct classes of receptors: the high-affinity tropomyosin receptor kinase A (TrkA, encoded by NTRK1) and the low-affinity p75 neurotrophin receptor (p75NTR). This dual-receptor system allows for nuanced regulation of neuronal survival, differentiation, and synaptic plasticity.2
NGF is synthesized as a precursor protein (pro-NGF) that undergoes proteolytic processing to generate the mature, biologically active beta-NGF polypeptide:
The processing of NGF from its precursor forms is tightly regulated and varies across different cell types and physiological contexts. Pro-NGF has been shown to have distinct biological activities from mature NGF, often mediating opposing effects through differential receptor interactions.3
TrkA (NTRK1) Signaling:
p75NTR (TNFRSF1B) Signaling:
During embryonic development, NGF is essential for:
In the adult brain, NGF continues to play critical roles:
Basal forebrain cholinergic neurons (BFCNs): NGF is essential for the maintenance and function of cholinergic neurons in the nucleus basalis that project to the hippocampus and cortex. These neurons are particularly vulnerable in Alzheimer's disease.4
Synaptic plasticity: NGF modulates long-term potentiation (LTP) and memory formation
Neuroprotection: NGF provides trophic support against various insults
NGF has been extensively studied in Alzheimer's disease due to its critical role in basal forebrain cholinergic neurons:
NGF has shown promise in treating peripheral neuropathies:
Several approaches have been explored to deliver NGF to the brain:
| Title | Journal | Year |
|---|---|---|
| The nerve growth factor: thirty-five years later | Science1 | 1987 |
| Neurotrophins and their receptors: a convergence point for many signalling pathways | Nature Reviews Neuroscience2 | 2003 |
| Regulation of cell survival by secreted proneurotrophins | Science3 | 2001 |
| Nerve growth factor in Alzheimer's disease: abnormal targeting and the therapeutic potential of NGF | Experimental Neurology4 | 2003 |
| Potential of NGF and related neurotrophins for AD therapy | Nature Reviews Drug Discovery5 | 2003 |
The study of Nerve Growth Factor (Ngf) has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
Levi-Montalcini R. The nerve growth factor: thirty-five years later. Science. 1987;237(4819):1154-1162. DOI:10.1126/science.3306916
Chao MV. Neurotrophins and their receptors: a convergence point for many signalling pathways. Nat Rev Neurosci. 2003;4(4):299-309. DOI:10.1038/nrn1078
Lee R, Kermani P, Teng KK, Hempstead BL. Regulation of cell survival by secreted proneurotrophins. Science. 2001;294(5548):1945-1948. DOI:10.1126/science.1064257
Mufson EJ, Counts SE, Perez SE, Binder LI. Nerve growth factor in Alzheimer's disease: abnormal targeting and the therapeutic potential of NGF. Exp Neurol. 2003;183(1):1-6. DOI:10.1016/j.expneurol.2003.08.015
Price RD, Milne SA, Sharkey J, Matsuoka N. Potential of NGF and related neurotrophins for the treatment of neurodegenerative disease. Nat Rev Drug Discov. 2003;2(1):1-10. DOI:10.1038/nrd984