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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Curtis, R. Acheson, A. Funakoshi, H. Yancopoulos, G. D. Glass, D. Tobkes, N. J. Ilag, L. L. Lindsay, R. M. Persson, H. Ryan, T. E. |
| Description | Author Affiliation: Ilag LL ( Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm, Sweden.); |
| Abstract | Pan-neurotrophin 1 (PNT-1) is a synthetic trophic factor engineered by combining active domains of the neurotrophins nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), and neurotrophin 3 (NT-3) into an NT-3 backbone. This molecule was produced in transiently transfected COS cells or in baculovirus-infected insect cells transfected COS cells or in baculovirus-infected insect cells and subsequently purified to homogeneity. Saturation binding in embryonic spinal sensory neurons demonstrated a greater number of high-affinity binding sites for PNT-1 than for its parental molecule NT-3. PNT-1 was shown to efficiently block the chemical crosslinking of NGF, BDNF, and NT-3 to their cognate Trk receptors and to the low-affintiy NGF receptor expressed on neuronal and nonneuronal cells. PNT-1 stimulated survival and proliferation of MG87 fibroblasts expressing either TrkA, TrkB, or TrkC. PNT-1 also promoted survival of a greater number of embryonic dorsal root ganglion neurons than any of the other neurotrophins alone, and its effects were equivalent to a combination of NGF, BDNF, and NT-3. Analysis of receptor-specific neurotrophic activities demonstrated that PNT-1 efficiently rescued TrkA mRNA-containing sympathetic neurons and TrkB and TrkC mRNA-containing sensory neurons from the dorsal root and nodose ganglia. Finally, PNT-1 showed robust retrograde transport to DRG neurons in vivo after injection into the sciatic nerve. Radiolabeled PNT-1 accumulated in small-, medium-, and large-sized neurons. Coinjection with different unlabeled neurotrophins inhibited PNT-1 transport in distinct subpopulations of neurons of different sizes, suggesting that this molecule affects sensory neurons of different modalities. These results indicate that PNT-1 is a potent and multispecific neurotrophic factor that may be useful in the treatment of peripheral neurophathies and nerve damage. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 2 |
| Volume Number | 92 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1995-02-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Nerve Growth Factors Genetics Metabolism Pharmacology Neurons Peripheral Nerves Recombinant Fusion Proteins Animals Autoradiography Biological Transport Brain-Derived Neurotrophic Factor Cell Survival Cells, Cultured Ganglia, Spinal Cytology Iodine Radioisotopes Isotope Labeling Lumbosacral Region Nerve Tissue Proteins Neurotrophin 3 Protein Engineering Receptors, Nerve Growth Factor Classification Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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