In this report the influence of several glucocorticoids on fasting blood sugar level, urinary glucose excretion, body weight and glucose tolerance were studied in rats with experimental steroid diabetes.
Steroids used in this experiment were cortisone, prednisolone, dexamethasone, and betamethasone. The doses were 10 mg, 2.0 mg, 0.4 mg, and 0.4 mg, respectively.
The experimental period was two weeks. The rats were fed with high carbohyrate diet for 6 days the experiment began and then corticosteroids were administered.
The glucose tolerance was measured just before and on the last day of the experiment.
The results are summarized as folllows :
1) Fasting blood sugar level was highest in rats administered with prednisolone, and was followed by rats treated with cortisone, dexamethasone, betamethasone, respectively.
2) Urinary glucose excretion was most remarkable in rats administered with dexamethasone, and was followed by those given prednisolone, betamethasone, cortisone, respectively.
3). The rats treated with prednisolone showed the lowest glucose tolerance, and were followed by those given dexamethasone, cortisone and betamethasone in that order.
4) The decrease in body weight of rats treated with dexamethasone was most remarkale, and was followed in those treated with betamethasone, cortisone, prednisolone in lesser degrees, sespectively.
5) Parallel relationship between urinary glucose excretion and glucose tolerance was seen. However, inverse relationship was seen between rise of fasting blood sugar level and decrease of body weight.
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