[Cyotchemical indices of the protein-synthesizing apparatus of hyperchromic nerve cells].

Cytophotometric, interferometric and autoradiographic methods were applied to evaluate hyperchromic motoneurons (HM) from spinal cord of mice which were allowed to swim for 4 hours. The HM in comparison with the normochromic motor nerve cells are characterized by a higher RNA content and a lower dry weight of perikaria. The autoradiographic data with H3-uridane make it possible to suggest that RNA exchange between the nucleus and cytoplasm of HM is accelerated. The mode of distribution of labelled proteins along the sciatic nerve 6 days after the local injection of H3-leucine in the ventral horn of L3--L4 spinal cord segments allows to conclude that the amount of protein transported with the slow component of axonal flow in the cases connected with the increase of the number of HM in corresponding nuclei is changed.