complex(p(HGNC:NGF), p(HGNC:NTRK1))

Components

• p(HGNC:NGF)
• p(HGNC:NTRK1)

NGF is synthesized as a precursor (proNGF) molecule that is proteolytically cleaved to a mature biologically active neurotrophin peptide [49]. Mature NGF binds to the TrkA receptor, which stimulates signal transduction pathways mediating the majority of the survival and growth effects of NGF [50], and to the p75NTR receptor, which is a positive modulator of NGF/TrkA binding [50]. However, p75NTR has multiple functions, including apoptotic or cell death actions [51–56], which are dependent upon its interaction with various receptor chaperones [57–59]. PubMed:18986241

NGF is synthesized as a precursor (proNGF) molecule that is proteolytically cleaved to a mature biologically active neurotrophin peptide [49]. Mature NGF binds to the TrkA receptor, which stimulates signal transduction pathways mediating the majority of the survival and growth effects of NGF [50], and to the p75NTR receptor, which is a positive modulator of NGF/TrkA binding [50]. However, p75NTR has multiple functions, including apoptotic or cell death actions [51–56], which are dependent upon its interaction with various receptor chaperones [57–59]. PubMed:18986241

In this regard, immunoblotting studies demonstrated that proNGF is the predominant form of NGF present in the cortex of aged cognitively intact humans [60]. ProNGF levels are increased in the cortex of subjects diagnosed with MCI or mild AD compared to those with NCI [61]. The biological consequences of proNGF are controversial, as is the function of its accumulation in the cortex during the prodromal stages of AD. Emerging literature suggests that recombinant proNGF binds TrkA and promotes neuronal survival and neurite outgrowth similar to mature NGF, but is approximately fivefold less active than the mature NGF peptide [62,63]. PubMed:18986241