Original article
Effects of sulodexide on urinary albumin excretion rate and expression of transforming growth factor–β1 in renal tissue of diabetic rats
Ke–yi LIN, Long–yi ZENG, Jiong SHU, Pan–wei MU, Bo–quan JIANG
Published 2009-06-27
Cite as Chin J Diabetes Mellitus, 2009, 01(3): 196-200. DOI: 10.3760/cma.j.issn.1674-5809.2009.03.010
Abstract
ObjectiveTo investigate the effects of sulodexide on 24–h urinary albumin excretion rate (UAER) and the mRNA or protein expression of transforming growth factor–β1 (TGF–β1) in diabetic rats induced by streptozotocin.
MethodsThirty–three healthy eight–week–old male Sprague Dawley (SD) rats were randomly divided into the normal control group (n=11), diabetic group (n=11), and sulodexide intervention group (n=11). The last two groups were injected with streptozotocin (65 mg/kg) at abdominal cavity while the normal control rats were injected with saline after 10 hours' fasting. When fasting blood glucose was >16.7 mmol/L for 72 h, the rats were confirmed to be patterned successfully. Nine rats in the diabetic group and 10 rats in the sulodexide group entered the study. The dose of sulodexide was 10 mg·kg–1·d–1, and the other two groups were administrated with comparative normal saline for 12 weeks. Overnight urine was collected to assess 24–h UAER after 12 weeks' treatment, and the renal sections were handed by immunohistochemical staining and the expression of TGF–β1 mRNA was detected by RT–PCR. One–way analysis of variances and SNK or LSD test were used for data analysis.
Results24–h UAER were average 363 μg/min in the diabetes control group, 151 μg/min in the sulodexide intervention group, and 26 μg/min in the normal control group (F=93.93, P<0.01). The expression of TGF–β1 mRNA were 3.11±0.84 in the diabetic group, 0.99±0.27 in the sulodexide intervention group, and 0.44±0.13 in the normal control group (F=80.43, P<0.01). The expression of TGF–β1 protein was most obvious in the endochylema of the renal tubule epithelium cells in diabetic rats, which was attenuated markedly by sulodexide.
ConclusionsSulodexide may play an important role in renoprotection by decreasing UAER and down–regulating the expression of TGF–β1 mRNA and protein of the renal tissues in diabetic rats.
Key words:
Diabetes mellitus; Albumins; Transforming growth factor beta; Sulodexide
Contributor Information
Ke–yi LIN
Department of Endocrinology, the Third Affiliated Hospital of Sun Yat–sen University, Guangzhou 510630, China
Long–yi ZENG
Jiong SHU
Pan–wei MU
Bo–quan JIANG