Abstract
The effect of splenectomy on hepatic ornithine decarboxylase (ODC) induction, DNA synthesis, and mitosis of hepatocytes was studied in rat liver after partial hepatectomy. ODC activity markedly increased in the early stages of liver regeneration, and the increase in the activity was significantly enhanced in splenectomized rats. Splenectomy specifically induced ODC since tyrosine aminotransferase and general protein synthesis were not affected. Splenectomy also enhanced increase in hepatic polyamines, DNA synthesis, and mitosis in regenerating liver. The results suggest that splenectomy affects liver regeneration after partial hepatectomy by enhancing induction of ODC activity, which is an important biochemical event in the early stage of liver regeneration.
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