Effect of dietary environment on the development of impaired glucose tolerance and pancreatic hormone secretion in neonatal streptozocin-treated (NSZ) rats.
The effects of four different diets, a balanced (BD), a high protein (HP), a high fat (HF), and a high carbohydrate (HC) diet on glucose tolerance and pancreatic hormone secretion were compared during the ten-week period immediately after weaning in rats having glucose intolerance induced by streptozocin in the neonatal period (NSZ). Feeding HF or HC produced decrease in calorie intake and a delay in body weight increase. All NSZ rats showed glucose intolerance as adults; the HF rats showed a further deterioration of glucose tolerance and a decreased insulinogenic index after oral glucose loading. Plasma insulin levels of HC rats were lowest. The glucose-induced insulin and somatostatin secretion from the isolated perfused pancreas was almost identical in all four groups. The arginine-induced insulin and glucagon secretion was decreased in HF and HC rats, compared to both HP and BD rats, but somatostatin secretion was not. These results indicate that a high fat or high carbohydrate dietary environment is an important factor in the development of glucose intolerance and in the impairment of pancreatic hormone responsiveness to stimulation.
Seino
Y
Y
Division of Metabolism and Clinical Nutrition, Kyoto University School of Medicine, Japan.
Usami
M
M
Okamoto
Y
Y
Yamamoto
T
T
Ikeda
M
M
Taminato
T
T
Imura
H
H
D000818:Animals; D000831:Animals, Newborn; D001120:Arginine / Q000494:pharmacology; D001786:Blood Glucose / Q000378:metabolism*; D001835:Body Weight; D003921:Diabetes Mellitus, Experimental / Q000097:blood / Q000503:physiopathology*; D004032:Diet; D002149:Energy Intake; D005934:Glucagon / Q000378:metabolism*; D066298:In Vitro Techniques; D007328:Insulin / Q000097:blood / Q000378:metabolism*; D000078790:Insulin Secretion; D010179:Pancreas / Q000187:drug effects / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains; D013004:Somatostatin / Q000378:metabolism*; D014886:Weaning
D001786:Blood Glucose; D007328:Insulin; D013004:Somatostatin; D005934:Glucagon; D001120:Arginine