Biological importance of retrograde axonal transport of nerve growth factor in adrenergic neurons
| Autor: | K. Stoeckel, H. Thoenen, U. Paravicini |
|---|---|
| Rok vydání: | 1975 |
| Předmět: |
Male
medicine.medical_specialty Sympathetic Nervous System Tyrosine 3-Monooxygenase Anterior Chamber medicine.medical_treatment Injections Subcutaneous Submandibular Gland Adrenergic Cytochrome c Group Adrenergic Neurons Axonal Transport Injections Iodine Radioisotopes Subcutaneous injection Mice Internal medicine medicine Animals Nerve Growth Factors Molecular Biology Ganglia Autonomic Tyrosine hydroxylase Chemistry General Neuroscience Biological Transport Axons Rats Nerve growth factor Endocrinology medicine.anatomical_structure nervous system Enzyme Induction Cervical ganglia Axoplasmic transport Autonomic Fibers Postganglionic Female Neurology (clinical) Axotomy Colchicine Developmental Biology |
| Zdroj: | Brain research. 84(2) |
| ISSN: | 0006-8993 |
| Popis: | Previous studies have shown that nerve growth factor (NGF) produces a selective induction of tyrosine hydroxylase (TH) in peripheral adrenergic neurons and that NGF is transported retrogradely with a high selectivity from the adrenergic nerve terminals to the perikaryon. In order to investigate the biological importance of retrograde NGF transport, the following experiments have been performed: (a) effect of NGF on TH activity in superior cervical ganglia (SCG) after unilateral injection into the anterior eye chamber and the submaxillary gland; and (b) effect of systemic injection of NGF on TH activity in SCG after blockade of retrograde axonal transport by axotomy. After unilateral injection of NGF into the anterior eye chamber and submaxillary gland of both 8–10-day-old rats and adult mice, the increase in TH activity in the SCG was considerably larger on the injected than on the non-injected side although the adrenergic neurons supplying the two organs do not account for more than 25% of the total number of adrenergic neurons in the SCG. A direct diffusion mechanism could be excluded by the fact that unilateral local injection of [ 125 I]NGF produced no significant side difference in the accumulation of radioactivity in the SCG2 h after injection whereas after 14 h there was a several-fold difference between the injected and non-injected side. Moreover, the nodose ganglia which are located very close to the SCG exhibited no statistically significant difference in the accumulation of radioactivity at any time. Forty-eight hours after subcutaneous injection of 10 mg/kg of NGF the increase in TH activity of the SCG amounted to 154% on the intact side and to 92% on the axotomized side. However, these experiments do not permit decisions about the extent that axotomy, as such, impaired the response to NGF. It is concluded that the biological effect of NGF results to a considerable extent, from the moiety which reaches the cell body by retrograde transport from the nerve terminals. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|