[Gastrin changes in the gastric antrum G-cells and in serum gastrin levels after 80% jejunoileal resection in rats].

A study was made of the changes in the cell population producing gastrin of the gastric antrum in rats submitted to resection of 80% of jejunum-ileum. Ninety days after surgery, the animals were killed after a 12 hour nightly fast and the gastric antrum was removed with the objective of specific histological preparations (PAP method) in order to count the G-cells and the blood was taken for serum doses of gastrin. An optical microscope was used to count the cells using a histometric integraded ocular of 42 points and the counting of 10 fields of each histological cut, and the radioimmunoassay method of double antibody was used for the seric dosing of gastrin. Histometry showed a significant drop in the G-cell population of the antrum of enterectomized animals when compared to the control group. Average percentage of G-cells found were 17.55% in the control group and 7.99% in the enterectomized ones. Blood dosing of hormone showed a significant increase of gastrin in the enterectomized animals when compared to controls. Average value of gastrin dosing the control group was 110 Pg/ml and 170 Pg/ml in enterectomized animals. Therefore, the present study permits to conclude that after resection of 80% of jejunum-ileum, there was a decrease in the G-cell population with gastrin in the gastric antrum even in the presence of increased serum gastrin.