Chromatin changes in frog neurons after eighth nerve transection.

Basic and applied histochemistry Pub Date : 1989-01-01
G Bernocchi, S Giacometti, E Scherini, P Valli
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Abstract

Fourteen days after unilateral eighth nerve transection in the frog, Purkinje neurons of the lobus vestibulolateralis and corpus of the cerebellum and medium-sized neurons of the vestibular nuclear complex showed changes in metabolic activity. In the ipsilateral parts, and to a lesser extent in the contralateral parts, of operated frogs, the Feulgen-DNA values were higher and the nuclear areas larger, associated with decondensation of chromatin. The cytoplasmic basophilia was also less. These changes could be due to anabolic responses of the neuronal populations during regeneration. The anabolic reaction of the corpus cerebelli and contralateral vestibular nuclear complex is only partially non-specific and ascribable to the surgical trauma (comparison between sham-operated and unoperated frogs). The results indicate clear patterns of connection between the ipsilateral and contralateral parts and between the cerebellar and vestibular nuclear complex neurons.

第八次神经横断后青蛙神经元的染色质变化。
横断蛙单侧第八神经14天后,前庭外侧叶、小脑体浦肯野神经元和前庭核复合体中等神经元的代谢活性发生变化。在手术青蛙的同侧部分,以及在较小程度上的对侧部分,Feulgen-DNA值更高,核区域更大,与染色质去浓缩有关。细胞质嗜碱性也较少。这些变化可能是由于再生过程中神经元群的合成代谢反应。小脑体和对侧前庭核复合体的合成代谢反应仅部分非特异性,可归因于手术创伤(假手术和未手术青蛙的比较)。结果表明,同侧和对侧部分以及小脑和前庭核复合体神经元之间存在明显的连接模式。
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