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2015 ; 9
(ä): 6269-74
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Xiaokeping mixture inhibits diabetic nephropathy in streptozotocin-induced rats
through blocking TGF-?1/Smad7 signaling
#MMPMID26664048
Xin C
; Xia Z
; Jiang C
; Lin M
; Li G
Drug Des Devel Ther
2015[]; 9
(ä): 6269-74
PMID26664048
show ga
BACKGROUND: Diabetic nephropathy (DN) is a major cause of chronic kidney failure
and characterized by excessive deposition of extracellular matrix. Evidence have
shown that transforming growth factor-?1 (TGF-?1) is a key mediator in the
development of DN. However, treatment of DN by blocking the TGF-?1/Smad7 pathway
remains limited. Xiaokeping mixture (XKP), a traditional Chinese herbal compound,
has been used for treatment in patients with DN for many years. METHODS: In the
present study, TGF-?1/Smad7 pathway analysis was used to evaluate the therapeutic
effect of XKP on DN rats induced by streptozotocin and to address the underlying
molecular mechanism. Male rats were divided into four groups: normal control,
untreated control group (fed with high fat), irbesartan-treated DN, and
XKP-treated DN, respectively. Levels of serum creatinine, blood urea nitrogen,
urine protein of 24 hours, and triacylglycerol were detected. Pathological
changes of renal tissues were observed by hematoxylin-eosin staining.
Immunohistochemical and Western blot analysis were used to detect the expressions
of TGF-?1 and Smad7. RESULTS: The results demonstrated that XKP can effectively
reduce the levels of glucose, serum creatinine, blood urea nitrogen, urine
protein of 24 hours, and triacylglycerol. Further studies indicated that
inhibition of DN in XKP-treated DN rats was associated with inhibition of
TGF-?1/Smad7 signaling as demonstrated by downregulation of TGF-?1 but
upregulation of Smad7. CONCLUSION: The data obtained from the present study
indicate that XKP may be a therapeutic agent for DN.