Further evidence that glycosaminoglycan specific to cholinergic synaptic vesicles recycles during electrical stimulation of the electric organ of Torpedo marmorata

1982 ◽  
Vol 224 (3) ◽  
Author(s):  
R.Theresa Jones ◽  
J.H. Walker ◽  
H. Stadler ◽  
V.P. Whittaker
Keyword(s):  
Electrical Stimulation ◽  
Synaptic Vesicles ◽  
Electric Organ ◽  
Torpedo Marmorata ◽  
Stimulation Of

scholarly journals Phospholipid turnover in Torpedo marmorata electric organ during discharge in vivo

1976 ◽  
Vol 158 (3) ◽  
pp. 557-565 ◽  
Author(s):  
J E Bleasdale ◽  
J N Hawthorne ◽  
L Widlund ◽  
E Heilbronn
Keyword(s):  
Electrical Stimulation ◽  
Density Gradient ◽  
Synaptic Vesicles ◽  
Electric Organ ◽  
The Other ◽  
Torpedo Marmorata ◽  
Phospholipid Turnover ◽  
Unstimulated Control ◽  
The Brain

One electric organ of anaesthetized Torpedo marmorata was stimulated through electrodes placed on the electric lobe of the brain. Nerves to the other electric organ were cut to provide an unstimulated control. Glucose 6-[32P]phosphate was injected into each organ 16h before electrical stimulation. After stimulation for 10 min at 5 Hz, the organs were removed homogenized and centrifuged on a density gradient for the preparation of subcellular fractions. Stimulation increased the incorporation of 32P into phosphatidate, phosphatidylinositol and phosphatidylcholine. The increased phosphatidate labelling, but not that of the other two lipids, was seen in fractions rich in synaptic vesicles. Stimulation had no effect on ATP labelling. The phosphatidate content of most fractions fell slightly after stimulation, but amounts of other phospholipids were not affected.

scholarly journals Submicroscopic Changes of the Nerve Endings in the Adrenal Medulla after Stimulation of the Splanchnic Nerve

1957 ◽  
Vol 3 (4) ◽  
pp. 611-614 ◽  
Author(s):  
Eduardo De Robertis ◽  
Alberto Vaz Ferreira
Keyword(s):  
Electrical Stimulation ◽  
Electron Microscope ◽  
Adrenal Medulla ◽  
Synaptic Vesicles ◽  
Splanchnic Nerve ◽  
The Other ◽  
Nerve Endings ◽  
The Mean ◽  
Increased Activity ◽  
Stimulation Of

The nerve endings of the adrenal medulla of the rabbit were studied under the electron microscope in the normal condition and after prolonged electrical stimulation of the splanchnic nerve. With a stimulus of 100 pulses per second for 10 minutes, there is an increase in the number of synaptic vesicles in the nerve ending. The mean number is of 82.6 vesicles per square micron in the normal and of 132.7 per square micron in the stimulated glands. With a stimulus of 400 pulses per second for 10 minutes, there is a considerable depletion of synaptic vesicles and other changes occur in the nerve endings. The mean number of vesicles is of 29.2 per square micron. These results are interpreted as indicative of an increased activity of the ending in one case, and as a diminished activity and fatigue of the synaptic junction in the other.

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