Abstract
Activation of the high-affinity nerve growth factor (NGF) receptor Trk occurs through multiple processes consisted of translocation and clustering within the plasma membrane lipid rafts, dimerization and autophosphorylation. Here we found that a nonprotein extract of inflamed rabbit skin inoculated with vaccinia virus (Neurotropin®) enhanced efficiency of NGF signaling. In rat pheochromocytoma PC12 cells overexpressing Trk (PCtrk cells), Neurotropin augmented insufficient neurite outgrowth observed at suboptimal concentration of NGF (2 ng/mL) in a manner depending on Trk kinase activity. Cellular exposure to Neurotropin resulted in an accumulation of Trk-GM1 complexes without affecting dimerization or phosphorylation states of Trk. Following NGF stimulation, Neurotropin significantly facilitated the time course of NGF-induced Trk autophosphorylation. These observations provide a unique mechanism controlling efficiency of NGF signaling, and raise the therapeutic potential of Neurotropin for various neurological conditions associated with neurotrophin dysfunction.
| Original language | English |
|---|---|
| Pages (from-to) | 13-21 |
| Number of pages | 9 |
| Journal | Brain Research |
| Volume | 1596 |
| DOIs | |
| Publication status | Published - 30-01-2015 |
All Science Journal Classification (ASJC) codes
- General Neuroscience
- Molecular Biology
- Clinical Neurology
- Developmental Biology