Chronic administration of pentagastrin. Effects on pancreatic protein and nucleic acid contents and protein synthesis in rats.
Groups of rats were injected with either saline or pentagastrin (0.5, 1 or 2 mg/kg/day) for 14 days. Pancreatic weight, DNA, RNA and protein contents as well as the ability of the pancreatic polyribosomes to synthesize protein in a cell-free system were investigated. In all three pentagastrin-treated groups the weight of the pancreas was found to be significantly higher (33-73%) than in the control. DNA, RNA and protein contents were significantly increased by 47, 98 and 85%, respectively, in the group that received the highest dose of the hormone. With respect to ribosomal protein synthesis, while the pentagastrin dose of 1 and 2 mg/kg/day resulted in 25 and 72% augmentation, respectively, the dose of 0.5 mg/kg had no influence on protein synthesis. It is concluded that chronic administration of pentagastrin (2 mg/kg/day for 14 days) causes hyperplasia and hypertrophy of the pancreas.
D000818:Animals; D004247:DNA / Q000378:metabolism*; D008297:Male; D009929:Organ Size / Q000187:drug effects; D010179:Pancreas / Q000187:drug effects / Q000378:metabolism*; D010418:Pentagastrin / Q000008:administration & dosage / Q000494:pharmacology*; D014176:Protein Biosynthesis; D011506:Proteins / Q000378:metabolism*; D012313:RNA / Q000378:metabolism*; D051381:Rats; D012270:Ribosomes / Q000378:metabolism
D011506:Proteins; D012313:RNA; D004247:DNA; D010418:Pentagastrin