Abstract—
Using electron microscopy, the effect of pronase on nerve ganglia of a mollusk, leech, and frog was studied for the first time. It was revealed that the effect of pronase causes the retraction and removal of glial membranes, as well as denudation of nerve fibers and neuronal bodies with a simultaneous convergence of neuromembranes of these structures, and leads to the formation of gap junctions. This effect of pronase on the membranes belongs to a number of unusual, unexpected functions, and we obtained the observed effect for the first time. Since we previously registered reverberation of a nerve impulse in the ganglia of a frog and a leech under the same conditions, we believe that the obtained morphological data represent an evidence of the formation of electrical synapses under the action of pronase on the nerve ganglia.
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This work was supported by state program 47 SP “Science and Technology Development of the Russian Federation” (2019–2030), topic 0134-2019-0001.
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Statement on the welfare of animals. The experiments were carried according to the requirements of the Council of the European Community (86/609/EEC) 1986 and the decision on the use of laboratory animals of the Commission of the Pavlov Institute of Physiology, Russian Academy of Sciences, on Humane Treatment of Animals no. 26/12 dated December 26, 2019.
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Translated by A. Barkhash
Abbreviations: GJ—gap junction; TJ—tight junction; ES—electrical synapse.
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Sotnikov, O., Sergeeva, S. & Paramonova, N. The Effect of Pronase on Mollusk, Leech, and Frog Nerve Ganglia Causes the Formation of Neuron–Neuronal Gap Junctions. Cell Tiss. Biol. 17, 197–202 (2023). https://doi.org/10.1134/S1990519X23020128
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DOI: https://doi.org/10.1134/S1990519X23020128