[Combined ultrastructural morphometric and biochemical investigations on the rat liver after ligation of the bile duct (author's transl)].

In the present study an ultrastructural morphometric analysis of the rat liver 1, 3 and 7 days after bile duct ligation was performed. Corresponding biochemical investigations included the determination of the cytochrom P 450 contents in the microsomal fraction. In the serum of the rats the activities of GOT and GPT were determined. The quantitative results have shown that the decreased P 450 contents of the microsomal fraction coincided with a considerable increasement of the surface of the smooth endoplasmic reticulum. The smooth endoplasmic reticulum was significantly increased from 1.83 m2/cm3 hepatocytes to 3.49 m2/cm3 hepatocytes after 3 days and remained on this level after 7 days. These results may be considered as quantitative evidence for the term hyperplastic, hypoactive endoplasmic reticulum. - As a second important result our quantitative investigations have shown that the increasement of GLDH activity in the serum especially 1 day after ligation of the bile duct coincided with a signficantly increased mitochondrial volume at this time.