RNA in the ganglia of Mollusca in normal conditions and following nerve damage (a histochemical study)

Salánki, János and Gubicza, András (1967) RNA in the ganglia of Mollusca in normal conditions and following nerve damage (a histochemical study). A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 34. pp. 73-83. ISSN 0365-3005

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Abstract

Applying malachite green pyronine staining on the ganglia of Anodonta cygnea the following observations were made: 1. Under normal conditions the cytoplasm of the nerve cells contains various amounts of RNA. In certain cells the cytoplasm is completely filled with RNA which is localized on rough granules (“pyroninophilous cells”). 2. Both nuclei and nucleoli of the “pyroninophilous cells” are significantly smaller than those of non-pyroninophilous cells of similar size. 3. Following the intersection of nerves a fine granular perinuclear RNA appears in some cells. The nucleoli of these cells are about 3 times as great as those of control cells. 4. On the 7th day following nerve damages some groups of cells in the glia contain numerous RNA and on the 9th day RNA is demonstrable also in the protrusions of glia. At that time strong vacuolization is observable in some cells. The perinuclear RNA ring is a regeneration phenomenon, and might be useful in localization studies. It is questionable, however, whether the strong increase of RNA content in the gha and vacuolization are related to regeneration or to degeneration processes of the nerve cells.

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