Effects of a transplantable insulinoma upon regulatory peptide concentrations in the gastrointestinal tract of the rat

Abstract
The rapid growth (0.8±0.3 g/day) of a transplantable insulinoma, which also contained substance P (2.9±2.3 pmol/g) and gastrin-releasing peptide (3.2± 2.1 pmoll/g), resulted in the development of hyperphagia, hyperinsulinaeinia and hypoglycaemia in rats (n=8). After a 14-day growth period, the insulinoma-bearing rats showed an increase (49%; ppppppp<0.05) in the insulinoma rats.