Abstract
The term neuronotrophic factor (NTF) designates a biological macromolecule that is required for the maintenance and general growth capabilities of selected nerve cells (Varon, 1977; Varon and Adler, 1980). The prototype for such factors has been nerve growth factor (NGF), a protein discovered some 30 years ago that acts both in vivo and in vitro on sensory and sympathetic peripheral neurons (e.g., Levi-Montalcini and Angeletti 1968; Varon, 1975a; Green and Shooter, 1980; Thoenen and Barde, 1980; Varon and Skaper, 1983a,b). Virtually all the NGF studies have relied on the use of tissue-culture techniques for the quantitative measure and monitoring of its biological activities.
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Varon, S., Manthorpe, M. (1984). Trophic and Neurite-Promoting Factors for Cholinergic Neurons. In: Black, I.B. (eds) Cellular and Molecular Biology of Neuronal Development. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2717-2_17
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