Somatomedin-C in the kidney of streptozotocin diabetic rats.
To evaluate the possible role of somatomedin-C, insulin-like growth factor I, in renal hypertrophy in early diabetes, kidney tissue SmC concentrations were measured in streptozotocin-induced (80 mg/kg ip) diabetic rats. Body weight, liver weight, plasma SmC concentration, and SmC concentration in the liver of diabetic rats were significantly lower than those of controls. Seven days after induction of diabetes, the kidney weight (898 +/- 95 mg) in diabetic rats was significantly greater than that in controls (755 +/- 69 mg), while SmC concentration in the kidney of diabetic rats (1.7 +/- 0.3 U/g kidney) was significantly lower than that of control rats (5.4 +/- 0.6 U/g kidney). These results suggest that renal SmC may not have an important role in renal hypertrophy in early stages of diabetes and that renal production of SmC may be impaired by insulin deficiency in rats.
Ikeda
T
T
First Department of Internal Medicine, Tottori University School of Medicine, Yonago, Japan.
Takeuchi
T
T
Honda
M
M
Mokuda
O
O
Tominaga
M
M
Mashiba
H
H
D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D003921:Diabetes Mellitus, Experimental / Q000378:metabolism*; D006454:Hemoglobins / Q000032:analysis; D007328:Insulin / Q000097:blood; D007334:Insulin-Like Growth Factor I / Q000032:analysis* / Q000097:blood; D007668:Kidney / Q000032:analysis*; D008099:Liver / Q000032:analysis; D008297:Male; D011863:Radioimmunoassay; D051381:Rats; D011919:Rats, Inbred Strains; D012016:Reference Values; D013002:Somatomedins / Q000032:analysis*
D001786:Blood Glucose; D006454:Hemoglobins; D007328:Insulin; D013002:Somatomedins; D007334:Insulin-Like Growth Factor I