The effect of pancreatic and intestinal venous blood on hepatic atrophy and compensatory hyperplasia in the rat.
Hepatotrophic effect of pancreatic and intestinal venous blood was studied in rats with mesocaval or distal splenocaval shunt following ligation of a branch of the portal vein supplying 70% of liver mass. Because 2/3 of liver mass was deprived of portal flow the nonligated liver lobes were not hypoperfused due to shunt procedure. During the first three postoperative days the DNA synthesis, mitotic index, and changes in relative weights were measured in both ligated (atrophied) and nonligated (compensatory hyperplasia) parts of the liver. It was found, that the restorative capacity of the liver existed in rats with selective portasystemic shunts. The stimulus to growth was greater in lobes supplied by intestinal venous blood compared to those perfused by pancreatic effluent. The increase in DNA synthesis occurred in lobes undergoing atrophy and the intensity of this response was also dependent on type of shunt since recirculation of intestinal blood by way of the hepatic artery inhibited atrophy to a greater extent than pancreatic venous effluent. Although the patency of arterial branches was confirmed the ligated lobes showed necrotic lesions. Systemic recirculation of intestinal venous blood far more inhibited necrosis than pancreatic venous blood.
Rózga
J
J
Department of General Surgery and Liver Disease, School of Medicine, Warsaw.
Jeppsson
B
B
Bengmark
S
S
D000818:Animals; D001284:Atrophy; D006965:Hyperplasia; D007422:Intestines / Q000098:blood supply*; D007511:Ischemia / Q000209:etiology / Q000473:pathology*; D008099:Liver / Q000098:blood supply* / Q000473:pathology; D008297:Male; D008642:Mesenteric Veins / Q000601:surgery; D010179:Pancreas / Q000098:blood supply*; D011169:Portal Vein / Q000601:surgery; D011170:Portasystemic Shunt, Surgical / Q000009:adverse effects*; D051381:Rats; D011919:Rats, Inbred Strains; D014682:Vena Cava, Inferior / Q000601:surgery