M. Zangi and H. Ofoghi
J Qazvin Univ Med Sci. ( JQUMS), Vol.20, No.6, 2017

The mammalian neurotrophin family proteins, nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), neurotrophin-3 (NT-3) and neurotrophin-4/5 (NT-4/5) are known as neuronal survival factors. NGF, one of the most important cytokines, is composed of 118 amino acids. NGF is involved in the growth and differentiation of neural cells of the vertebrate peripheral sympathetic nerve as well as basal forebrain cholinergic neurons which degenerate in Alzheimer’s disease. In addition, it is implicated in the regulation of synaptic transmission and synaptogenesis in the central nervous system. NGF is produced by a variety of immune cells, including B cells, T cells, monocytes and mast cells as well as nervous system and binds through two distinct receptors, TrkA and p75NTR which signaling through them leads to the neuronal differentiation and cell death respectively. Considering the importance of this protein as a drug, NGF has been proposed for the treatment of neuron degenerative diseases such as Alzheimer's, Parkinson's and multiple sclerosis. To produce enough protein for research and clinical applications, genetic engineering techniques are used to produce recombinant forms. To date, there are no reports about the systems for production of the recombinant human NGF in an effective, low cost, with industrial production. Plants as a safe host generally offer major advantages such as free of animal pathogens, low costs, the ability to produce a protein similar to natural protein, and industrial production in large scale. Then they are suitable for the production of recombinant human NGF

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