Nucleus ultrastructure of dog dorsal root ganglia cells after partial ischemia

The partial ischemia of the adult dogs, both males and females was induced by the ligature of aorta abdominalis above the branching of arteria coeliaca within 80 minutes and 120 minutes duration with the following preparation of L6 und L7 dorsal root ganglia. The nuclei and nucleoli of the dorsal root ganglia nerve cells were studied by the usual standard transmission electron microscopic procedures. Comparing the control and ischemized material we have observed the different reaction of the nuclei and nucleoli to the ischemia. Some of these structures remained unchanged, the others demonstrated a various degree of the alteration. After the partial ischemia some nucleoli were more compact, some nucleolonemata were less distinct but no karyoplasmic changes were noted. The nucleolar interstitial vacuoles were occasionally enlarged and the satellite bodies were observed scarcely in the proximity of the nucleolus.