The influence of Roux-Y versus Longmire-Gütgemann reconstruction on the composition of pancreatic juice.

Both methods of reconstruction after gastrectomy lead more or less to an insufficiency of pancreas. Therefore investigations on rats should further clarify which defects are obvious after both operation methods. Wistar rats were divided into 3 groups. In 2 groups a gastrectomy was performed while one was reconstructed according to the method of Roux-Y, the other was treated according to the method of Longmire-Gütgemann. The first group was a sham operated control group. 3 months after this operation pancreatic juice was collected over the time of 6 hours. Volume and protein content were determined as well as a differentiation of the proteins by means of the 2D electrophoresis which separates the molecules according to isoelectric focus and the molecular weight. The results show a significant increase of the volume of pancreatic juice after both operations. Whereas the protein content is also altered the number of proteins is significantly decreased. Especially proteins with an alkaline isoelectric focus are significantly diminished. The molecular weight of the proteins is also changed. Low molecular protein fragments which were not observed in the sham operated group are increased especially in the Roux-Y group. This means that the production of enzymes is changed after both operations. The pH optimum as well as the viability of the protein enzymes is shifted. Since the changes are more pronounced after Roux-Y operation signs of pancreatic insufficiency should be expected more frequently after this operation.